/* roulang page: index */
:root {
            --color-primary: #1E1830;
            --color-primary-light: #2A2338;
            --color-primary-lighter: #251C3A;
            --color-accent: #FF4D5E;
            --color-accent-hover: #E63A4B;
            --color-secondary: #00C9A7;
            --color-gold: #F5B841;
            --color-bg: #FAF7F2;
            --color-card: #FFFFFF;
            --color-text: #1A1423;
            --color-text-muted: #5A5560;
            --color-text-light: #8A8490;
            --color-border: #E8E2DA;
            --color-border-light: rgba(255, 255, 255, 0.06);
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-pill: 50px;
            --shadow-card: 0 4px 12px rgba(26, 20, 35, 0.05);
            --shadow-card-hover: 0 12px 28px rgba(26, 20, 35, 0.12);
            --shadow-dark: 0 8px 20px rgba(0, 0, 0, 0.25);
            --shadow-hero: 0 16px 40px rgba(0, 0, 0, 0.35);
            --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
            --font-numeric: "Inter", "Roboto", system-ui, sans-serif;
            --section-padding: 72px;
            --section-padding-mobile: 48px;
            --container-max: 1200px;
            --transition-base: all 0.25s ease;
            --transition-smooth: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--color-text);
            background-color: var(--color-bg);
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition-base);
        }

        a:hover {
            color: var(--color-accent);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input {
            font-family: inherit;
            font-size: inherit;
        }

        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        section {
            padding: var(--section-padding) 0;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.5px;
            color: var(--color-secondary);
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-text);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .section-desc {
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text-muted);
            max-width: 720px;
            margin-bottom: 32px;
        }

        .section-desc.light {
            color: rgba(255, 255, 255, 0.75);
        }

        .btn-kuaizhibo {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            border: none;
            cursor: pointer;
            transition: var(--transition-base);
            text-decoration: none;
            white-space: nowrap;
        }

        .btn-kuaizhibo:focus-visible {
            outline: 2px solid var(--color-secondary);
            outline-offset: 2px;
        }

        .btn-primary-kuaizhibo {
            background-color: var(--color-accent);
            color: #fff;
            box-shadow: 0 4px 12px rgba(255, 77, 94, 0.3);
        }

        .btn-primary-kuaizhibo:hover {
            background-color: var(--color-accent-hover);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(255, 77, 94, 0.4);
        }

        .btn-primary-kuaizhibo:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(255, 77, 94, 0.3);
        }

        .btn-secondary-kuaizhibo {
            background-color: transparent;
            color: var(--color-text);
            border: 1.5px solid var(--color-text);
        }

        .btn-secondary-kuaizhibo:hover {
            background-color: var(--color-text);
            color: #fff;
            transform: translateY(-1px);
        }

        .btn-secondary-kuaizhibo.light {
            border-color: rgba(255, 255, 255, 0.7);
            color: #fff;
        }

        .btn-secondary-kuaizhibo.light:hover {
            background-color: #fff;
            color: var(--color-primary);
            border-color: #fff;
        }

        .btn-outline-kuaizhibo {
            background-color: transparent;
            color: var(--color-text);
            border: 1.5px solid var(--color-border);
        }

        .btn-outline-kuaizhibo:hover {
            border-color: var(--color-text);
            color: var(--color-text);
        }

        .btn-lg-kuaizhibo {
            padding: 14px 32px;
            font-size: 16px;
        }

        .btn-sm-kuaizhibo {
            padding: 8px 16px;
            font-size: 13px;
        }

        .card-kuaizhibo {
            background: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition-smooth);
            height: 100%;
        }

        .card-kuaizhibo:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .card-dark {
            background: var(--color-primary-light);
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-dark);
        }

        .card-dark:hover {
            border-color: rgba(255, 255, 255, 0.2);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
        }

        .card-cover {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            border-radius: var(--radius-card) var(--radius-card) 0 0;
            display: block;
        }

        .card-body-pad {
            padding: 24px;
        }

        .card-title {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.4;
            color: var(--color-text);
            margin-bottom: 8px;
        }

        .card-text {
            font-size: 14px;
            line-height: 1.7;
            color: var(--color-text-muted);
            margin-bottom: 16px;
        }

        .badge-kuaizhibo {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 600;
            line-height: 1.5;
            background-color: rgba(0, 201, 167, 0.1);
            color: #00876F;
        }

        .badge-accent {
            background-color: rgba(255, 77, 94, 0.1);
            color: var(--color-accent);
        }

        .badge-gold {
            background-color: rgba(245, 184, 65, 0.15);
            color: #B8860B;
        }

        .badge-dark {
            background-color: rgba(255, 255, 255, 0.08);
            color: #fff;
        }

        .stat-number {
            font-family: var(--font-numeric);
            font-size: 48px;
            font-weight: 800;
            line-height: 1.1;
            letter-spacing: -1px;
            color: var(--color-text);
        }

        .stat-number.light {
            color: #fff;
        }

        .stat-number.accent {
            color: var(--color-accent);
        }

        .stat-label {
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text-muted);
        }

        .stat-label.light {
            color: rgba(255, 255, 255, 0.7);
        }

        /* Header / Navigation */
        .top-promo-bar {
            background-color: var(--color-primary);
            color: #fff;
            font-size: 12px;
            height: 36px;
            display: flex;
            align-items: center;
            position: relative;
            z-index: 1030;
        }

        .top-promo-bar .promo-content {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .top-promo-bar .promo-link {
            color: #fff;
            text-decoration: underline;
            font-size: 12px;
            transition: var(--transition-base);
        }

        .top-promo-bar .promo-link:hover {
            color: var(--color-secondary);
        }

        .main-header {
            background-color: #fff;
            height: 72px;
            box-shadow: 0 1px 0 var(--color-border);
            position: sticky;
            top: 0;
            z-index: 1020;
            transition: var(--transition-base);
        }

        .main-header .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .logo-wrapper {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: linear-gradient(135deg, var(--color-accent), #FF7D8A);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 18px;
            font-weight: 800;
            letter-spacing: -0.5px;
        }

        .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: -0.5px;
            line-height: 1;
        }

        .nav-menu-desktop {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-menu-desktop li a {
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text);
            padding: 8px 0;
            position: relative;
            transition: var(--transition-base);
        }

        .nav-menu-desktop li a:hover {
            color: var(--color-accent);
        }

        .nav-menu-desktop li a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--color-secondary);
            transition: var(--transition-base);
        }

        .nav-menu-desktop li a:hover::after {
            width: 100%;
        }

        .nav-menu-desktop li a.active {
            color: var(--color-accent);
            font-weight: 600;
        }

        .nav-menu-desktop li a.active::after {
            width: 100%;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }

        .header-icon-btn {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 1px solid var(--color-border);
            background: none;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-text);
            cursor: pointer;
            transition: var(--transition-base);
            font-size: 16px;
        }

        .header-icon-btn:hover {
            border-color: var(--color-accent);
            color: var(--color-accent);
            background-color: rgba(255, 77, 94, 0.05);
        }

        .hamburger-btn {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 8px;
            border: 1px solid var(--color-border);
            background: none;
            color: var(--color-text);
            font-size: 20px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: var(--transition-base);
        }

        .hamburger-btn:hover {
            border-color: var(--color-accent);
            color: var(--color-accent);
        }

        .mobile-drawer-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 1040;
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .mobile-drawer-overlay.show {
            opacity: 1;
        }

        .mobile-drawer {
            position: fixed;
            top: 0;
            right: -320px;
            width: 300px;
            height: 100vh;
            background: var(--color-primary);
            z-index: 1050;
            transition: right 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            padding: 24px;
            overflow-y: auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .mobile-drawer.open {
            right: 0;
        }

        .mobile-drawer .drawer-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 16px;
        }

        .mobile-drawer .drawer-logo {
            color: #fff;
            font-size: 20px;
            font-weight: 700;
        }

        .mobile-drawer .drawer-close {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.3);
            background: none;
            color: #fff;
            font-size: 18px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .mobile-drawer .drawer-menu {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .mobile-drawer .drawer-menu li a {
            display: block;
            padding: 14px 0;
            color: #fff;
            font-size: 16px;
            font-weight: 500;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition-base);
        }

        .mobile-drawer .drawer-menu li a:hover {
            color: var(--color-secondary);
            padding-left: 6px;
        }

        /* Hero */
        .hero-section {
            background-color: var(--color-primary);
            background-image: linear-gradient(160deg, #1E1830 0%, #251C3A 50%, #1E1830 100%);
            position: relative;
            overflow: hidden;
            padding: 80px 0 96px;
            min-height: 600px;
            display: flex;
            align-items: center;
        }

        .hero-section .hero-img-bg {
            position: absolute;
            top: 0;
            right: 0;
            width: 55%;
            height: 100%;
            background-image: url('/assets/images/2af5c4744226cd50.jpg');
            background-size: cover;
            background-position: center;
            opacity: 0.25;
            z-index: 1;
            pointer-events: none;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 55%;
            height: 100%;
            background: linear-gradient(to left, rgba(30, 24, 48, 0.85), rgba(30, 24, 48, 0.2) 60%, transparent);
            z-index: 2;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 3;
            max-width: 680px;
        }

        .hero-live-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 77, 94, 0.2);
            color: var(--color-accent);
            padding: 6px 16px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 20px;
            border: 1px solid rgba(255, 77, 94, 0.3);
        }

        .hero-live-badge .live-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--color-accent);
            animation: pulse-dot 1.5s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.5;
                transform: scale(1.4);
            }
        }

        .hero-title {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.25;
            color: #fff;
            letter-spacing: -1px;
            margin-bottom: 20px;
        }

        .hero-subtitle {
            font-size: 18px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 32px;
            max-width: 560px;
        }

        .hero-cta-group {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        .hero-stats-row {
            display: flex;
            gap: 32px;
            margin-top: 40px;
            flex-wrap: wrap;
        }

        .hero-stat-item {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .hero-stat-item .hs-number {
            font-family: var(--font-numeric);
            font-size: 32px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.5px;
        }

        .hero-stat-item .hs-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.65);
            font-weight: 500;
        }

        .hero-stat-item .hs-number.accent {
            color: var(--color-gold);
        }

        /* Section backgrounds */
        .section-muted {
            background-color: #F3EDE6;
            border-radius: 24px;
            margin: 0 12px;
        }

        .section-dark {
            background-color: var(--color-primary);
            padding: 64px 0;
        }

        .section-dark .section-title {
            color: #fff;
        }

        .section-dark .section-desc {
            color: rgba(255, 255, 255, 0.7);
        }

        .section-plain {
            background-color: var(--color-bg);
        }

        .section-white {
            background-color: #fff;
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }

        /* Pain point cards */
        .pain-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            padding: 24px;
            height: 100%;
            transition: var(--transition-smooth);
            position: relative;
        }

        .pain-card:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .pain-card .pain-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            background-color: rgba(255, 77, 94, 0.1);
            color: var(--color-accent);
            margin-bottom: 16px;
        }

        .pain-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
        }

        .pain-card p {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* FAQ */
        .faq-wrapper {
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition-base);
        }

        .faq-item:hover {
            border-color: var(--color-secondary);
        }

        .faq-question {
            padding: 18px 24px;
            display: flex;
            align-items: flex-start;
            gap: 12px;
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-text);
            transition: var(--transition-base);
        }

        .faq-question:hover {
            color: var(--color-accent);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background-color: rgba(0, 201, 167, 0.1);
            color: var(--color-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 700;
        }

        .faq-answer {
            padding: 0 24px 20px 64px;
            font-size: 15px;
            line-height: 1.7;
            color: var(--color-text-muted);
            display: none;
        }

        .faq-item.active .faq-answer {
            display: block;
        }

        .faq-item.active .faq-question {
            color: var(--color-accent);
        }

        /* News cards */
        .news-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            padding: 20px 24px;
            transition: var(--transition-smooth);
            height: 100%;
        }

        .news-card:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .news-date {
            font-size: 13px;
            font-weight: 500;
            color: var(--color-text-light);
            margin-bottom: 8px;
        }

        .news-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.4;
            margin-bottom: 8px;
        }

        .news-excerpt {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-bottom: 12px;
        }

        .link-arrow {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            color: var(--color-accent);
            font-size: 14px;
            font-weight: 600;
            transition: var(--transition-base);
        }

        .link-arrow:hover {
            color: var(--color-accent-hover);
            gap: 8px;
        }

        /* Timeline / steps */
        .step-flow {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .step-item {
            position: relative;
            padding: 24px;
            text-align: center;
            background: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            transition: var(--transition-smooth);
        }

        .step-item:hover {
            border-color: var(--color-secondary);
            box-shadow: var(--shadow-card-hover);
        }

        .step-number {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--color-accent);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            margin: 0 auto 12px;
            font-family: var(--font-numeric);
        }

        .step-item h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 6px;
        }

        .step-item p {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* Resource cards */
        .resource-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            padding: 24px;
            border: 1px solid var(--color-border);
            transition: var(--transition-smooth);
            height: 100%;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .resource-card:hover {
            border-color: var(--color-gold);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .resource-card .rc-icon {
            width: 48px;
            height: 48px;
            border-radius: 10px;
            background-color: rgba(245, 184, 65, 0.12);
            color: #B8860B;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 16px;
        }

        .resource-card h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 6px;
        }

        .resource-card p {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* CTA form */
        .form-input {
            height: 48px;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-btn);
            padding: 0 16px;
            font-size: 15px;
            color: var(--color-text);
            background-color: #fff;
            transition: var(--transition-base);
            width: 100%;
        }

        .form-input:focus {
            outline: none;
            border-color: var(--color-secondary);
            box-shadow: 0 0 0 3px rgba(0, 201, 167, 0.1);
        }

        .form-input.error {
            border-color: var(--color-accent);
        }

        .form-group {
            margin-bottom: 16px;
        }

        .form-error-text {
            font-size: 13px;
            color: var(--color-accent);
            margin-top: 6px;
        }

        /* Footer */
        .site-footer {
            background-color: var(--color-primary);
            color: rgba(255, 255, 255, 0.75);
            padding: 64px 0 32px;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 32px;
            margin-bottom: 40px;
        }

        .site-footer .footer-brand {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }

        .site-footer .footer-desc {
            font-size: 13px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.55);
            max-width: 280px;
        }

        .site-footer h5 {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .site-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .site-footer ul li {
            margin-bottom: 10px;
        }

        .site-footer ul li a {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition-base);
        }

        .site-footer ul li a:hover {
            color: var(--color-secondary);
        }

        .site-footer .footer-divider {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }

        .site-footer .footer-copyright {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }

        .site-footer .footer-bottom-links {
            display: flex;
            gap: 20px;
            font-size: 13px;
        }

        .site-footer .footer-bottom-links a {
            color: rgba(255, 255, 255, 0.6);
        }
        .site-footer .footer-bottom-links a:hover {
            color: var(--color-secondary);
        }

        /* Responsive */
        @media (max-width: 992px) {
            .nav-menu-desktop {
                display: none;
            }
            .hamburger-btn {
                display: flex;
            }
            .hero-title {
                font-size: 32px;
            }
            .hero-section {
                padding: 64px 0 72px;
            }
            .step-flow {
                grid-template-columns: repeat(2, 1fr);
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            section {
                padding: var(--section-padding-mobile) 0;
            }
        }

        @media (max-width: 768px) {
            .hero-section .hero-img-bg {
                width: 100%;
                opacity: 0.15;
            }
            .hero-section::before {
                width: 100%;
                background: linear-gradient(to top, rgba(30, 24, 48, 0.9), rgba(30, 24, 48, 0.6));
            }
            .hero-title {
                font-size: 28px;
                letter-spacing: -0.5px;
            }
            .hero-subtitle {
                font-size: 16px;
            }
            .hero-stats-row {
                gap: 20px;
            }
            .hero-stat-item .hs-number {
                font-size: 24px;
            }
            .stat-number {
                font-size: 36px;
            }
            .section-title {
                font-size: 26px;
            }
            .step-flow {
                grid-template-columns: 1fr;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-divider {
                flex-direction: column;
                align-items: flex-start !important;
            }
            .faq-answer {
                padding-left: 24px;
                padding-right: 24px;
            }
            .faq-question {
                padding: 16px 20px;
            }
        }

        @media (max-width: 576px) {
            .hero-title {
                font-size: 24px;
                line-height: 1.3;
            }
            .hero-cta-group {
                flex-direction: column;
                gap: 12px;
            }
            .hero-cta-group .btn-kuaizhibo {
                width: 100%;
            }
            .hero-stats-row {
                gap: 16px;
                margin-top: 28px;
            }
            .stat-number {
                font-size: 28px;
            }
            .section-title {
                font-size: 22px;
            }
            .card-body-pad {
                padding: 18px;
            }
            .news-card {
                padding: 16px 18px;
            }
            .btn-kuaizhibo {
                padding: 10px 18px;
                font-size: 14px;
            }
            .btn-lg-kuaizhibo {
                padding: 12px 24px;
                font-size: 15px;
            }
        }

        /* Utility */
        .text-accent {
            color: var(--color-accent);
        }
        .text-secondary {
            color: var(--color-secondary);
        }
        .text-gold {
            color: var(--color-gold);
        }
        .bg-primary-soft {
            background-color: rgba(30, 24, 48, 0.03);
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .mt-0 {
            margin-top: 0;
        }
        .gap-16 {
            gap: 16px;
        }
        .gap-24 {
            gap: 24px;
        }
        .img-rounded {
            border-radius: var(--radius-card);
            overflow: hidden;
        }

/* roulang page: category3 */
:root {
  --color-primary: #1E1830;
  --color-primary-light: #2A2338;
  --color-primary-lighter: #251C3A;
  --color-accent: #FF4D5E;
  --color-accent-hover: #E63A4B;
  --color-secondary: #00C9A7;
  --color-gold: #F5B841;
  --color-bg: #FAF7F2;
  --color-card: #FFFFFF;
  --color-text: #1A1423;
  --color-text-muted: #5A5560;
  --color-text-light: #8A8490;
  --color-border: #E8E2DA;
  --color-border-light: rgba(255, 255, 255, 0.06);
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-pill: 50px;
  --shadow-card: 0 4px 12px rgba(26, 20, 35, 0.05);
  --shadow-card-hover: 0 12px 28px rgba(26, 20, 35, 0.12);
  --shadow-dark: 0 8px 20px rgba(0, 0, 0, 0.25);
  --shadow-hero: 0 16px 40px rgba(0, 0, 0, 0.35);
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-numeric: "Inter", "Roboto", system-ui, sans-serif;
  --section-padding: 72px;
  --section-padding-mobile: 48px;
  --container-max: 1200px;
  --transition-base: all 0.25s ease;
  --transition-smooth: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
}
a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition-base);
}
a:hover {
  color: var(--color-accent);
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
button, input {
  font-family: inherit;
  font-size: inherit;
}
.container-custom {
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
section {
  padding: var(--section-padding) 0;
}
.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: var(--color-secondary);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.section-title {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text);
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.section-desc {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text-muted);
  max-width: 720px;
  margin-bottom: 32px;
}
.section-desc.light {
  color: rgba(255, 255, 255, 0.75);
}
.btn-kuaizhibo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  border: none;
  cursor: pointer;
  transition: var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
}
.btn-kuaizhibo:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
}
.btn-primary-kuaizhibo {
  background-color: var(--color-accent);
  color: #fff;
  box-shadow: 0 4px 12px rgba(255, 77, 94, 0.3);
}
.btn-primary-kuaizhibo:hover {
  background-color: var(--color-accent-hover);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(255, 77, 94, 0.4);
}
.btn-primary-kuaizhibo:active {
  transform: translateY(0);
  box-shadow: 0 2px 6px rgba(255, 77, 94, 0.3);
}
.btn-secondary-kuaizhibo {
  background-color: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-text);
}
.btn-secondary-kuaizhibo:hover {
  background-color: var(--color-text);
  color: #fff;
  transform: translateY(-1px);
}
.btn-secondary-kuaizhibo.light {
  border-color: rgba(255, 255, 255, 0.7);
  color: #fff;
}
.btn-secondary-kuaizhibo.light:hover {
  background-color: #fff;
  color: var(--color-primary);
  border-color: #fff;
}
.btn-outline-kuaizhibo {
  background-color: transparent;
  color: var(--color-text);
  border: 1.5px solid var(--color-border);
}
.btn-outline-kuaizhibo:hover {
  border-color: var(--color-text);
  color: var(--color-text);
}
.btn-lg-kuaizhibo {
  padding: 14px 32px;
  font-size: 16px;
}
.btn-sm-kuaizhibo {
  padding: 8px 16px;
  font-size: 13px;
}
.card-kuaizhibo {
  background: var(--color-card);
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: var(--transition-smooth);
}
.card-kuaizhibo:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}
/* Header / Nav */
.main-header {
  position: sticky;
  top: 0;
  z-index: 1030;
  background: #fff;
  box-shadow: 0 1px 0 var(--color-border), 0 2px 8px rgba(26,20,35,0.03);
}
.top-promo-bar {
  height: 36px;
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: #fff;
  letter-spacing: 0.3px;
}
.top-promo-bar a {
  color: var(--color-gold);
  margin-left: 8px;
  font-weight: 600;
}
.top-promo-bar a:hover {
  color: var(--color-secondary);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 16px;
}
.logo-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 18px;
  line-height: 1;
}
.logo-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.3px;
}
.nav-menu-desktop {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-menu-desktop li a {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  padding: 8px 0;
  position: relative;
  display: inline-block;
}
.nav-menu-desktop li a:hover {
  color: var(--color-accent);
}
.nav-menu-desktop li a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--color-secondary);
  transition: var(--transition-base);
}
.nav-menu-desktop li a:hover::after,
.nav-menu-desktop li a.active::after {
  width: 100%;
}
.nav-menu-desktop li a.active {
  color: var(--color-accent);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.header-icon-btn {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  color: var(--color-text);
  font-size: 18px;
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition-base);
}
.header-icon-btn:hover {
  background: var(--color-bg);
  color: var(--color-accent);
}
.hamburger-btn {
  width: 44px;
  height: 44px;
  display: none;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-size: 20px;
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition-base);
}
.hamburger-btn:hover {
  background: var(--color-bg);
  color: var(--color-accent);
}
/* Mobile drawer */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: -320px;
  width: 300px;
  height: 100vh;
  background: var(--color-primary);
  z-index: 1050;
  transition: right 0.3s cubic-bezier(0.25,0.46,0.45,0.94);
  padding: 24px;
  display: flex;
  flex-direction: column;
  box-shadow: -8px 0 30px rgba(0,0,0,0.25);
}
.mobile-drawer.open {
  right: 0;
}
.mobile-drawer-close {
  align-self: flex-end;
  width: 44px;
  height: 44px;
  background: rgba(255,255,255,0.08);
  border: none;
  color: #fff;
  font-size: 20px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-base);
}
.mobile-drawer-close:hover {
  background: rgba(255,255,255,0.15);
}
.mobile-drawer-menu {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.mobile-drawer-menu a {
  color: #fff;
  font-size: 18px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.mobile-drawer-menu a:hover {
  color: var(--color-secondary);
}
.mobile-drawer .btn-kuaizhibo {
  margin-top: 24px;
}
.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 1040;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-base);
}
.drawer-overlay.open {
  opacity: 1;
  visibility: visible;
}
/* Breadcrumb */
.breadcrumb-kuaizhibo {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  font-size: 14px;
  color: var(--color-text-muted);
}
.breadcrumb-kuaizhibo li {
  display: flex;
  align-items: center;
  gap: 8px;
}
.breadcrumb-kuaizhibo li + li::before {
  content: "/";
  color: var(--color-text-light);
  font-size: 13px;
}
.breadcrumb-kuaizhibo a {
  color: var(--color-text-muted);
}
.breadcrumb-kuaizhibo a:hover {
  color: var(--color-accent);
}
.breadcrumb-kuaizhibo .active {
  color: var(--color-text);
  font-weight: 600;
}
/* Page header */
.page-header-section {
  padding: 48px 0 32px;
  background: var(--color-bg);
}
.page-header-section .section-title {
  font-size: 36px;
  margin-bottom: 12px;
}
.page-header-section .section-desc {
  max-width: 820px;
  margin-bottom: 0;
}
.search-docs-form {
  display: flex;
  gap: 12px;
  max-width: 520px;
  margin-top: 20px;
}
.search-docs-form input {
  flex: 1;
  height: 48px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-btn);
  padding: 0 16px;
  font-size: 15px;
  outline: none;
  background: #fff;
  transition: var(--transition-base);
}
.search-docs-form input:focus {
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px rgba(0,201,167,0.1);
}
.search-docs-form .btn-kuaizhibo {
  height: 48px;
  padding: 0 28px;
}
/* Docs cards */
.docs-section {
  padding-bottom: var(--section-padding);
}
.docs-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.docs-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}
.docs-card-image {
  aspect-ratio: 16/9;
  overflow: hidden;
  position: relative;
}
.docs-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-smooth);
}
.docs-card:hover .docs-card-image img {
  transform: scale(1.04);
}
.docs-card-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 4px 12px;
  background: var(--color-accent);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--radius-pill);
  line-height: 1.5;
  z-index: 1;
}
.docs-card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.docs-card-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-secondary);
  letter-spacing: 0.4px;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.docs-card-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.4;
  margin-bottom: 12px;
}
.docs-card-excerpt {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 16px;
}
.docs-card-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition-base);
}
.docs-card-link i {
  font-size: 13px;
  transition: transform 0.2s ease;
}
.docs-card-link:hover {
  color: var(--color-accent-hover);
}
.docs-card-link:hover i {
  transform: translateX(4px);
}
/* API/SDK section */
.api-sdk-section {
  background: var(--color-card);
}
.api-sdk-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 12px;
}
.api-sdk-item {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 24px;
  text-align: center;
  transition: var(--transition-smooth);
}
.api-sdk-item:hover {
  border-color: var(--color-secondary);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}
.api-sdk-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  background: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-secondary);
  font-size: 22px;
}
.api-sdk-item h4 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-text);
}
.api-sdk-item p {
  font-size: 13px;
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.6;
}
/* Architecture section */
.architecture-section {
  background: var(--color-primary);
  position: relative;
  overflow: hidden;
}
.architecture-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, #1E1830 0%, #251C3A 100%);
  z-index: 0;
}
.architecture-section .container-custom {
  position: relative;
  z-index: 1;
}
.architecture-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.architecture-visual {
  position: relative;
  border-radius: var(--radius-card);
  overflow: hidden;
  min-height: 360px;
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: var(--shadow-dark);
}
.architecture-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  inset: 0;
}
.architecture-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(26,20,35,0.35);
}
.architecture-visual .arch-overlay-text {
  position: absolute;
  bottom: 24px;
  left: 24px;
  z-index: 2;
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.4px;
}
.architecture-content h3 {
  font-size: 26px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  line-height: 1.35;
}
.architecture-content p {
  color: rgba(255,255,255,0.75);
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 20px;
}
.arch-layers {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.arch-layers li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(255,255,255,0.85);
  font-size: 14px;
  padding: 10px 16px;
  background: rgba(255,255,255,0.05);
  border-radius: 8px;
  border-left: 3px solid var(--color-secondary);
}
.arch-layers li i {
  color: var(--color-secondary);
  font-size: 15px;
  flex-shrink: 0;
}
/* Compatibility section */
.compat-section {
  background: var(--color-bg);
}
.compat-table-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
  background: #fff;
  box-shadow: var(--shadow-card);
}
.compat-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 680px;
}
.compat-table th,
.compat-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  font-size: 14px;
}
.compat-table th {
  background: var(--color-primary);
  color: #fff;
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.3px;
  white-space: nowrap;
}
.compat-table tr:last-child td {
  border-bottom: none;
}
.compat-table td:first-child {
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
}
.compat-table tbody tr:hover {
  background: #faf7f2;
}
.compat-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
}
.compat-badge.full {
  background: rgba(0,201,167,0.1);
  color: #00a087;
}
.compat-badge.partial {
  background: rgba(245,184,65,0.1);
  color: #c98a1e;
}
.compat-badge.no {
  background: rgba(255,77,94,0.1);
  color: var(--color-accent);
}
/* CTA section */
.cta-section {
  background: var(--color-primary);
  position: relative;
}
.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta-inner h2 {
  font-size: 28px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
  line-height: 1.3;
}
.cta-inner p {
  color: rgba(255,255,255,0.75);
  font-size: 15px;
  margin: 0;
  max-width: 480px;
}
.cta-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
/* Footer */
.site-footer {
  background: var(--color-primary);
  padding: 56px 0 24px;
  color: rgba(255,255,255,0.7);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}
.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,0.55);
}
.footer-grid h5 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}
.footer-grid ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-grid ul a {
  color: rgba(255,255,255,0.6);
  font-size: 14px;
  transition: var(--transition-base);
}
.footer-grid ul a:hover {
  color: var(--color-secondary);
}
.footer-divider {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-copyright {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
}
.footer-bottom-links {
  display: flex;
  gap: 20px;
}
.footer-bottom-links a {
  font-size: 13px;
  color: rgba(255,255,255,0.6);
  transition: var(--transition-base);
}
.footer-bottom-links a:hover {
  color: var(--color-secondary);
}
/* Responsive */
@media (max-width: 992px) {
  .nav-menu-desktop {
    display: none;
  }
  .hamburger-btn {
    display: flex;
  }
  .header-actions .btn-kuaizhibo.d-md-inline-flex {
    display: none !important;
  }
  .docs-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .api-sdk-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .architecture-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .architecture-visual {
    min-height: 280px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}
@media (max-width: 768px) {
  .section-title {
    font-size: 26px;
  }
  .page-header-section .section-title {
    font-size: 28px;
  }
  section {
    padding: var(--section-padding-mobile) 0;
  }
  .docs-grid {
    grid-template-columns: 1fr;
  }
  .api-sdk-grid {
    grid-template-columns: 1fr 1fr;
    gap: 14px;
  }
  .api-sdk-item {
    padding: 16px;
  }
  .cta-inner {
    flex-direction: column;
    align-items: flex-start;
  }
  .cta-actions {
    flex-direction: column;
    width: 100%;
  }
  .cta-actions .btn-kuaizhibo {
    width: 100%;
    justify-content: center;
  }
  .search-docs-form {
    flex-direction: column;
  }
  .search-docs-form .btn-kuaizhibo {
    width: 100%;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-divider {
    flex-direction: column;
    text-align: center;
  }
  .footer-bottom-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}
@media (max-width: 576px) {
  .container-custom {
    padding-left: 16px;
    padding-right: 16px;
  }
  .section-title {
    font-size: 24px;
    letter-spacing: -0.3px;
  }
  .page-header-section .section-title {
    font-size: 24px;
  }
  .page-header-section {
    padding: 32px 0 20px;
  }
  .api-sdk-grid {
    grid-template-columns: 1fr;
  }
  .architecture-visual {
    min-height: 200px;
  }
  .header-actions .header-icon-btn:nth-child(2) {
    display: none;
  }
  .cta-inner h2 {
    font-size: 22px;
  }
  .top-promo-bar {
    font-size: 11px;
    text-align: center;
    padding: 0 12px;
  }
}

/* roulang page: category1 */
:root {
            --color-primary: #1E1830;
            --color-primary-light: #2A2338;
            --color-primary-lighter: #251C3A;
            --color-accent: #FF4D5E;
            --color-accent-hover: #E63A4B;
            --color-secondary: #00C9A7;
            --color-gold: #F5B841;
            --color-bg: #FAF7F2;
            --color-card: #FFFFFF;
            --color-text: #1A1423;
            --color-text-muted: #5A5560;
            --color-text-light: #8A8490;
            --color-border: #E8E2DA;
            --color-border-light: rgba(255, 255, 255, 0.06);
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-pill: 50px;
            --shadow-card: 0 4px 12px rgba(26, 20, 35, 0.05);
            --shadow-card-hover: 0 12px 28px rgba(26, 20, 35, 0.12);
            --shadow-dark: 0 8px 20px rgba(0, 0, 0, 0.25);
            --shadow-hero: 0 16px 40px rgba(0, 0, 0, 0.35);
            --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
            --font-numeric: "Inter", "Roboto", system-ui, sans-serif;
            --section-padding: 72px;
            --section-padding-mobile: 48px;
            --container-max: 1200px;
            --transition-base: all 0.25s ease;
            --transition-smooth: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--color-text);
            background-color: var(--color-bg);
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--color-accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input {
            font-family: inherit;
            font-size: inherit;
        }
        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        section {
            padding: var(--section-padding) 0;
        }
        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.5px;
            color: var(--color-secondary);
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-text);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .section-desc {
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text-muted);
            max-width: 720px;
            margin-bottom: 32px;
        }
        .section-desc.light {
            color: rgba(255, 255, 255, 0.75);
        }
        .btn-kuaizhibo {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            border: none;
            cursor: pointer;
            transition: var(--transition-base);
            text-decoration: none;
            white-space: nowrap;
        }
        .btn-kuaizhibo:focus-visible {
            outline: 2px solid var(--color-secondary);
            outline-offset: 2px;
        }
        .btn-primary-kuaizhibo {
            background-color: var(--color-accent);
            color: #fff;
            box-shadow: 0 4px 12px rgba(255, 77, 94, 0.3);
        }
        .btn-primary-kuaizhibo:hover {
            background-color: var(--color-accent-hover);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(255, 77, 94, 0.4);
        }
        .btn-primary-kuaizhibo:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(255, 77, 94, 0.3);
        }
        .btn-secondary-kuaizhibo {
            background-color: transparent;
            color: var(--color-text);
            border: 1.5px solid var(--color-text);
        }
        .btn-secondary-kuaizhibo:hover {
            background-color: var(--color-text);
            color: #fff;
            transform: translateY(-1px);
        }
        .btn-secondary-kuaizhibo.light {
            border-color: rgba(255, 255, 255, 0.7);
            color: #fff;
        }
        .btn-secondary-kuaizhibo.light:hover {
            background-color: #fff;
            color: var(--color-primary);
            border-color: #fff;
        }
        .btn-outline-kuaizhibo {
            background-color: transparent;
            color: var(--color-text);
            border: 1.5px solid var(--color-border);
        }
        .btn-outline-kuaizhibo:hover {
            border-color: var(--color-text);
            color: var(--color-text);
        }
        .btn-lg-kuaizhibo {
            padding: 14px 32px;
            font-size: 16px;
        }
        .btn-sm-kuaizhibo {
            padding: 8px 16px;
            font-size: 13px;
        }
        .card-kuaizhibo {
            background: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition-smooth);
            height: 100%;
        }
        .card-kuaizhibo:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .card-kuaizhibo .card-img {
            aspect-ratio: 16/9;
            overflow: hidden;
            background-color: var(--color-primary-lighter);
        }
        .card-kuaizhibo .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition-base);
        }
        .card-kuaizhibo:hover .card-img img {
            transform: scale(1.04);
        }
        .card-kuaizhibo .card-body {
            padding: 24px;
        }
        .card-kuaizhibo .card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
            line-height: 1.35;
        }
        .card-kuaizhibo .card-text {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
            margin-bottom: 12px;
        }
        .badge-kuaizhibo {
            display: inline-block;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.3px;
            line-height: 1.5;
        }
        .badge-accent {
            background-color: rgba(255, 77, 94, 0.12);
            color: var(--color-accent);
        }
        .badge-secondary {
            background-color: rgba(0, 201, 167, 0.12);
            color: var(--color-secondary);
        }
        .badge-gold {
            background-color: rgba(245, 184, 65, 0.15);
            color: var(--color-gold);
        }
        .badge-dark {
            background-color: var(--color-primary);
            color: #fff;
        }

        /* Header / Nav */
        .main-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: #fff;
            border-bottom: 1px solid var(--color-border);
        }
        .promo-bar {
            background: var(--color-primary);
            color: rgba(255, 255, 255, 0.85);
            font-size: 12px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            letter-spacing: 0.3px;
        }
        .promo-bar a {
            color: #fff;
            text-decoration: underline;
            font-weight: 600;
            margin-left: 8px;
        }
        .promo-bar a:hover {
            color: var(--color-gold);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }
        .logo-wrapper {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--color-primary);
            color: #fff;
            font-weight: 700;
            font-size: 18px;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: -0.3px;
        }
        .nav-menu-desktop {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-menu-desktop a {
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text);
            padding: 8px 0;
            position: relative;
            white-space: nowrap;
        }
        .nav-menu-desktop a:hover {
            color: var(--color-accent);
        }
        .nav-menu-desktop a.active {
            color: var(--color-accent);
        }
        .nav-menu-desktop a.active::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 2px;
            background: var(--color-secondary);
            border-radius: 2px;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .header-icon-btn {
            width: 40px;
            height: 40px;
            border-radius: 8px;
            border: 1px solid var(--color-border);
            background: #fff;
            color: var(--color-text);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition-base);
            font-size: 16px;
        }
        .header-icon-btn:hover {
            border-color: var(--color-accent);
            color: var(--color-accent);
        }
        .hamburger-btn {
            width: 44px;
            height: 44px;
            border-radius: 8px;
            border: 1px solid var(--color-border);
            background: #fff;
            color: var(--color-text);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition-base);
            font-size: 18px;
        }
        .hamburger-btn:hover {
            border-color: var(--color-accent);
            color: var(--color-accent);
        }
        .drawer-menu {
            position: fixed;
            top: 0;
            right: 0;
            bottom: 0;
            width: 280px;
            background: var(--color-primary);
            z-index: 1100;
            transform: translateX(100%);
            transition: transform 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            padding: 24px;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .drawer-menu.open {
            transform: translateX(0);
        }
        .drawer-menu .drawer-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
        }
        .drawer-menu .drawer-close {
            background: rgba(255, 255, 255, 0.1);
            border: none;
            color: #fff;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            cursor: pointer;
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition-base);
        }
        .drawer-menu .drawer-close:hover {
            background: rgba(255, 255, 255, 0.2);
        }
        .drawer-menu a {
            color: rgba(255, 255, 255, 0.85);
            font-size: 16px;
            font-weight: 500;
            padding: 10px 4px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .drawer-menu a:hover,
        .drawer-menu a.active {
            color: var(--color-accent);
        }
        .drawer-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 1050;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s ease;
        }
        .drawer-overlay.show {
            opacity: 1;
            pointer-events: auto;
        }

        /* Breadcrumb */
        .breadcrumb-kuaizhibo {
            background: transparent;
            padding: 16px 0 0;
            margin: 0;
            font-size: 14px;
        }
        .breadcrumb-kuaizhibo .breadcrumb-item a {
            color: var(--color-text-muted);
        }
        .breadcrumb-kuaizhibo .breadcrumb-item a:hover {
            color: var(--color-accent);
        }
        .breadcrumb-kuaizhibo .breadcrumb-item.active {
            color: var(--color-text);
            font-weight: 600;
        }
        .breadcrumb-kuaizhibo .breadcrumb-item+.breadcrumb-item::before {
            content: '/';
            color: var(--color-text-light);
            margin: 0 8px;
        }

        /* Hero-type page header */
        .page-header-section {
            background: var(--color-primary);
            padding: 56px 0 48px;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .page-header-section::after {
            content: '';
            position: absolute;
            top: -60%;
            right: -20%;
            width: 70%;
            height: 220%;
            background: radial-gradient(ellipse at center, rgba(255, 77, 94, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }
        .page-header-section .breadcrumb-kuaizhibo {
            margin-bottom: 20px;
            padding: 0;
        }
        .page-header-section .breadcrumb-kuaizhibo .breadcrumb-item a,
        .page-header-section .breadcrumb-kuaizhibo .breadcrumb-item.active {
            color: rgba(255, 255, 255, 0.7);
        }
        .page-header-section .breadcrumb-kuaizhibo .breadcrumb-item a:hover {
            color: var(--color-accent);
        }
        .page-header-section .breadcrumb-kuaizhibo .breadcrumb-item.active {
            color: #fff;
            font-weight: 600;
        }
        .page-header-section .breadcrumb-kuaizhibo .breadcrumb-item+.breadcrumb-item::before {
            color: rgba(255, 255, 255, 0.4);
        }
        .page-header-section h1 {
            font-size: 40px;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
            line-height: 1.25;
        }
        .page-header-section .page-header-desc {
            font-size: 16px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.75);
            max-width: 760px;
        }

        /* Section patterns */
        .section-alt {
            background: #fff;
        }
        .section-dark {
            background: var(--color-primary);
            color: #fff;
        }
        .section-dark .section-title {
            color: #fff;
        }
        .section-dark .section-desc {
            color: rgba(255, 255, 255, 0.7);
        }

        /* Scheme cards */
        .scheme-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition-smooth);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .scheme-card:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .scheme-card .scheme-img {
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--color-primary-lighter);
            position: relative;
        }
        .scheme-card .scheme-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition-base);
        }
        .scheme-card:hover .scheme-img img {
            transform: scale(1.04);
        }
        .scheme-card .scheme-body {
            padding: 24px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        .scheme-card .scheme-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
            line-height: 1.35;
        }
        .scheme-card .scheme-text {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
            flex-grow: 1;
        }
        .scheme-card .scheme-badge {
            margin-bottom: 12px;
        }

        /* Protocol comparison */
        .protocol-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .protocol-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            padding: 28px 24px;
            text-align: center;
            transition: var(--transition-base);
        }
        .protocol-card:hover {
            border-color: var(--color-secondary);
            box-shadow: var(--shadow-card-hover);
        }
        .protocol-card .protocol-icon {
            width: 52px;
            height: 52px;
            border-radius: 12px;
            background: rgba(0, 201, 167, 0.1);
            color: var(--color-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            font-size: 22px;
        }
        .protocol-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 4px;
        }
        .protocol-card .protocol-sub {
            font-size: 12px;
            color: var(--color-text-light);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
        }
        .protocol-card p {
            font-size: 13px;
            color: var(--color-text-muted);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* Metrics */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .metric-item {
            text-align: center;
            padding: 32px 20px;
            background: var(--color-primary-light);
            border: 1px solid var(--color-border-light);
            border-radius: var(--radius-card);
            transition: var(--transition-base);
        }
        .metric-item:hover {
            border-color: rgba(255, 255, 255, 0.2);
            transform: translateY(-2px);
        }
        .metric-number {
            font-family: var(--font-numeric);
            font-size: 42px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            letter-spacing: -1px;
        }
        .metric-number .unit {
            font-size: 20px;
            font-weight: 600;
            color: var(--color-accent);
            margin-left: 2px;
        }
        .metric-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.65);
            margin-top: 8px;
            font-weight: 500;
        }

        /* FAQ */
        .faq-kuaizhibo .accordion-item {
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card) !important;
            background: var(--color-card);
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
        }
        .faq-kuaizhibo .accordion-item:hover {
            border-color: var(--color-secondary);
        }
        .faq-kuaizhibo .accordion-button {
            font-weight: 600;
            font-size: 16px;
            color: var(--color-text);
            padding: 18px 20px;
            background: transparent;
            border: none;
            box-shadow: none;
            display: flex;
            align-items: center;
            gap: 12px;
            line-height: 1.4;
        }
        .faq-kuaizhibo .accordion-button:focus {
            box-shadow: none;
            border-color: transparent;
        }
        .faq-kuaizhibo .accordion-button:not(.collapsed) {
            background: transparent;
            color: var(--color-accent);
            box-shadow: none;
        }
        .faq-kuaizhibo .accordion-button::after {
            display: none;
        }
        .faq-kuaizhibo .faq-icon {
            color: var(--color-secondary);
            font-size: 18px;
            flex-shrink: 0;
        }
        .faq-kuaizhibo .accordion-button:not(.collapsed) .faq-icon {
            color: var(--color-accent);
        }
        .faq-kuaizhibo .accordion-body {
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.7;
            padding: 0 20px 18px 50px;
        }
        .faq-kuaizhibo .accordion-button .fa-chevron-down {
            margin-left: auto;
            font-size: 13px;
            color: var(--color-text-light);
            transition: transform 0.3s ease;
        }
        .faq-kuaizhibo .accordion-button:not(.collapsed) .fa-chevron-down {
            transform: rotate(180deg);
            color: var(--color-accent);
        }

        /* CTA section */
        .cta-section {
            background: var(--color-primary);
            padding: 64px 0;
            color: #fff;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -40%;
            left: 50%;
            transform: translateX(-50%);
            width: 80%;
            height: 180%;
            background: radial-gradient(ellipse at center, rgba(0, 201, 167, 0.1) 0%, transparent 65%);
            pointer-events: none;
        }
        .cta-section h2 {
            font-size: 32px;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .cta-section p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.7);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .cta-section .btn-kuaizhibo {
            font-size: 16px;
            padding: 14px 36px;
        }

        /* Footer */
        .site-footer {
            background: var(--color-primary);
            color: rgba(255, 255, 255, 0.8);
            padding: 56px 0 32px;
            font-size: 14px;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .site-footer .footer-brand {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .site-footer .footer-desc {
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            margin-bottom: 0;
            font-size: 13px;
        }
        .site-footer h5 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.2px;
        }
        .site-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer ul li {
            margin-bottom: 10px;
        }
        .site-footer ul a {
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition-base);
        }
        .site-footer ul a:hover {
            color: var(--color-accent);
        }
        .site-footer .footer-divider {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }
        .site-footer .footer-copyright {
            color: rgba(255, 255, 255, 0.5);
            font-size: 13px;
        }
        .site-footer .footer-bottom-links {
            display: flex;
            gap: 20px;
            align-items: center;
        }
        .site-footer .footer-bottom-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 13px;
            transition: var(--transition-base);
        }
        .site-footer .footer-bottom-links a:hover {
            color: var(--color-accent);
        }

        /* Responsive */
        @media (max-width: 992px) {
            .nav-menu-desktop {
                display: none;
            }
            .header-actions .btn-kuaizhibo.d-none.d-md-inline-flex {
                display: none !important;
            }
            .hamburger-btn {
                display: flex;
            }
            .protocol-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .site-footer .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px;
            }
        }
        @media (min-width: 993px) {
            .hamburger-btn {
                display: none;
            }
        }
        @media (max-width: 768px) {
            section {
                padding: var(--section-padding-mobile) 0;
            }
            .page-header-section {
                padding: 40px 0 36px;
            }
            .page-header-section h1 {
                font-size: 30px;
            }
            .section-title {
                font-size: 26px;
            }
            .scheme-card .scheme-body {
                padding: 20px;
            }
            .protocol-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .protocol-card {
                padding: 20px 16px;
            }
            .metrics-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .metric-number {
                font-size: 32px;
            }
            .cta-section h2 {
                font-size: 26px;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .site-footer .footer-divider {
                flex-direction: column;
                text-align: center;
                align-items: center;
            }
        }
        @media (max-width: 576px) {
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
            .page-header-section h1 {
                font-size: 26px;
            }
            .page-header-section .page-header-desc {
                font-size: 14px;
            }
            .section-title {
                font-size: 22px;
            }
            .scheme-card .scheme-img {
                aspect-ratio: 16/9;
            }
            .protocol-grid {
                grid-template-columns: 1fr;
            }
            .metrics-grid {
                grid-template-columns: 1fr 1fr;
            }
            .metric-number {
                font-size: 28px;
            }
            .cta-section {
                padding: 48px 0;
            }
            .cta-section h2 {
                font-size: 22px;
            }
            .btn-kuaizhibo {
                width: auto;
            }
            .cta-section .btn-kuaizhibo {
                width: 100%;
            }
            .header-inner {
                height: 64px;
            }
            .logo-text {
                font-size: 18px;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 16px;
            }
            .header-icon-btn {
                width: 36px;
                height: 36px;
            }
            .hamburger-btn {
                width: 40px;
                height: 40px;
            }
        }

/* roulang page: category2 */
:root {
            --color-primary: #1E1830;
            --color-primary-light: #2A2338;
            --color-primary-lighter: #251C3A;
            --color-accent: #FF4D5E;
            --color-accent-hover: #E63A4B;
            --color-secondary: #00C9A7;
            --color-gold: #F5B841;
            --color-bg: #FAF7F2;
            --color-card: #FFFFFF;
            --color-text: #1A1423;
            --color-text-muted: #5A5560;
            --color-text-light: #8A8490;
            --color-border: #E8E2DA;
            --color-border-light: rgba(255, 255, 255, 0.06);
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-pill: 50px;
            --shadow-card: 0 4px 12px rgba(26, 20, 35, 0.05);
            --shadow-card-hover: 0 12px 28px rgba(26, 20, 35, 0.12);
            --shadow-dark: 0 8px 20px rgba(0, 0, 0, 0.25);
            --shadow-hero: 0 16px 40px rgba(0, 0, 0, 0.35);
            --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
            --font-numeric: "Inter", "Roboto", system-ui, sans-serif;
            --section-padding: 72px;
            --section-padding-mobile: 48px;
            --container-max: 1200px;
            --transition-base: all 0.25s ease;
            --transition-smooth: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--color-text);
            background-color: var(--color-bg);
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--color-accent);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input {
            font-family: inherit;
            font-size: inherit;
        }

        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        section {
            padding: var(--section-padding) 0;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.5px;
            color: var(--color-secondary);
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-text);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .section-desc {
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text-muted);
            max-width: 720px;
            margin-bottom: 32px;
        }
        .section-desc.light {
            color: rgba(255, 255, 255, 0.75);
        }

        .btn-kuaizhibo {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            border: none;
            cursor: pointer;
            transition: var(--transition-base);
            text-decoration: none;
            white-space: nowrap;
        }
        .btn-kuaizhibo:focus-visible {
            outline: 2px solid var(--color-secondary);
            outline-offset: 2px;
        }
        .btn-primary-kuaizhibo {
            background-color: var(--color-accent);
            color: #fff;
            box-shadow: 0 4px 12px rgba(255, 77, 94, 0.3);
        }
        .btn-primary-kuaizhibo:hover {
            background-color: var(--color-accent-hover);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(255, 77, 94, 0.4);
        }
        .btn-primary-kuaizhibo:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(255, 77, 94, 0.3);
        }
        .btn-secondary-kuaizhibo {
            background-color: transparent;
            color: var(--color-text);
            border: 1.5px solid var(--color-text);
        }
        .btn-secondary-kuaizhibo:hover {
            background-color: var(--color-text);
            color: #fff;
            transform: translateY(-1px);
        }
        .btn-secondary-kuaizhibo.light {
            border-color: rgba(255, 255, 255, 0.7);
            color: #fff;
        }
        .btn-secondary-kuaizhibo.light:hover {
            background-color: #fff;
            color: var(--color-primary);
            border-color: #fff;
        }
        .btn-outline-kuaizhibo {
            background-color: transparent;
            color: var(--color-text);
            border: 1.5px solid var(--color-border);
        }
        .btn-outline-kuaizhibo:hover {
            border-color: var(--color-text);
            color: var(--color-text);
        }
        .btn-lg-kuaizhibo {
            padding: 14px 32px;
            font-size: 16px;
        }
        .btn-sm-kuaizhibo {
            padding: 8px 16px;
            font-size: 13px;
        }

        .card-kuaizhibo {
            background: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .card-kuaizhibo:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .card-kuaizhibo .card-img-wrapper {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16/9;
            background-color: var(--color-primary);
        }
        .card-kuaizhibo .card-img-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .card-kuaizhibo:hover .card-img-wrapper img {
            transform: scale(1.04);
        }
        .card-kuaizhibo .card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-kuaizhibo .card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
            line-height: 1.35;
        }
        .card-kuaizhibo .card-text {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }
        .card-kuaizhibo .card-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--color-accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .card-kuaizhibo .card-link:hover {
            color: var(--color-accent-hover);
        }
        .card-kuaizhibo .badge-scene {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--color-accent);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            letter-spacing: 0.3px;
        }

        .badge-soft {
            display: inline-block;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 600;
            background-color: rgba(0, 201, 167, 0.1);
            color: var(--color-secondary);
        }
        .badge-gold {
            display: inline-block;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 600;
            background-color: rgba(245, 184, 65, 0.15);
            color: #B8860B;
        }

        /* Header */
        .main-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: #fff;
            box-shadow: 0 1px 0 var(--color-border);
        }
        .top-promo-bar {
            background: var(--color-primary);
            color: rgba(255, 255, 255, 0.9);
            font-size: 12px;
            padding: 6px 0;
            text-align: center;
            letter-spacing: 0.3px;
        }
        .top-promo-bar a {
            color: #fff;
            font-weight: 600;
            margin-left: 8px;
        }
        .top-promo-bar a:hover {
            color: var(--color-gold);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 16px;
        }
        .logo-wrapper {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-wrapper:hover {
            color: var(--color-text);
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--color-primary);
            color: #fff;
            font-size: 18px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            letter-spacing: -1px;
        }
        .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: -0.5px;
        }
        .nav-menu-desktop {
            display: flex;
            align-items: center;
            list-style: none;
            margin: 0;
            padding: 0;
            gap: 8px;
        }
        .nav-menu-desktop li a {
            display: inline-block;
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text);
            border-radius: 6px;
            position: relative;
            transition: var(--transition-base);
            white-space: nowrap;
        }
        .nav-menu-desktop li a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--color-secondary);
            border-radius: 1px;
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.3s ease;
        }
        .nav-menu-desktop li a:hover {
            color: var(--color-accent);
        }
        .nav-menu-desktop li a:hover::after,
        .nav-menu-desktop li a.active::after {
            transform: scaleX(1);
        }
        .nav-menu-desktop li a.active {
            color: var(--color-accent);
            font-weight: 600;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .header-icon-btn {
            width: 40px;
            height: 40px;
            border: none;
            background: transparent;
            color: var(--color-text);
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            cursor: pointer;
            transition: var(--transition-base);
        }
        .header-icon-btn:hover {
            background: var(--color-bg);
            color: var(--color-accent);
        }
        .hamburger-btn {
            display: none;
            width: 44px;
            height: 44px;
            border: none;
            background: transparent;
            color: var(--color-text);
            font-size: 20px;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            cursor: pointer;
            transition: var(--transition-base);
        }
        .hamburger-btn:hover {
            background: var(--color-bg);
        }

        /* Mobile drawer */
        .mobile-drawer {
            position: fixed;
            top: 0;
            right: -320px;
            width: 300px;
            height: 100vh;
            background: var(--color-primary);
            z-index: 1045;
            transition: right 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            padding: 24px 20px;
            overflow-y: auto;
            box-shadow: -4px 0 20px rgba(0, 0, 0, 0.3);
        }
        .mobile-drawer.open {
            right: 0;
        }
        .mobile-drawer-close {
            width: 44px;
            height: 44px;
            border: none;
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            cursor: pointer;
            margin-bottom: 20px;
            transition: var(--transition-base);
        }
        .mobile-drawer-close:hover {
            background: rgba(255, 255, 255, 0.2);
        }
        .mobile-drawer ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .mobile-drawer ul li {
            margin-bottom: 4px;
        }
        .mobile-drawer ul li a {
            display: block;
            padding: 14px 12px;
            color: #fff;
            font-size: 16px;
            font-weight: 500;
            border-radius: 8px;
            transition: var(--transition-base);
        }
        .mobile-drawer ul li a:hover,
        .mobile-drawer ul li a.active {
            background: rgba(255, 255, 255, 0.1);
            color: var(--color-gold);
        }
        .drawer-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 1040;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s ease;
        }
        .drawer-overlay.show {
            opacity: 1;
            pointer-events: auto;
        }

        /* Breadcrumb */
        .breadcrumb-kuaizhibo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--color-text-muted);
            list-style: none;
            margin: 0;
            padding: 16px 0;
            flex-wrap: wrap;
        }
        .breadcrumb-kuaizhibo li {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .breadcrumb-kuaizhibo li a {
            color: var(--color-text-muted);
        }
        .breadcrumb-kuaizhibo li a:hover {
            color: var(--color-accent);
        }
        .breadcrumb-kuaizhibo li:not(:last-child)::after {
            content: '/';
            color: var(--color-text-light);
            margin-left: 4px;
        }
        .breadcrumb-kuaizhibo li:last-child {
            color: var(--color-text);
            font-weight: 600;
        }

        /* Page header (not hero) */
        .page-header-scenes {
            background: var(--color-primary);
            padding: 48px 0 56px;
            position: relative;
            overflow: hidden;
        }
        .page-header-scenes::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(255, 77, 94, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .page-header-scenes .h1-scenes {
            font-size: 36px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
            line-height: 1.3;
        }
        .page-header-scenes .lead-scenes {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 720px;
            line-height: 1.8;
        }
        .page-header-scenes .breadcrumb-kuaizhibo {
            padding: 0 0 20px;
            color: rgba(255, 255, 255, 0.6);
        }
        .page-header-scenes .breadcrumb-kuaizhibo li a {
            color: rgba(255, 255, 255, 0.7);
        }
        .page-header-scenes .breadcrumb-kuaizhibo li a:hover {
            color: var(--color-gold);
        }
        .page-header-scenes .breadcrumb-kuaizhibo li:not(:last-child)::after {
            color: rgba(255, 255, 255, 0.4);
        }
        .page-header-scenes .breadcrumb-kuaizhibo li:last-child {
            color: #fff;
        }

        /* Scene cards grid */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .scene-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition-base);
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        .scene-card:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .scene-card .scene-img {
            aspect-ratio: 16/9;
            overflow: hidden;
            position: relative;
            background: var(--color-primary);
        }
        .scene-card .scene-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .scene-card:hover .scene-img img {
            transform: scale(1.04);
        }
        .scene-card .scene-body {
            padding: 20px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .scene-card .scene-name {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
            line-height: 1.35;
        }
        .scene-card .scene-desc {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
            flex: 1;
        }
        .scene-card .scene-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-top: 12px;
        }

        /* Compare table */
        .compare-table-wrapper {
            overflow-x: auto;
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            background: var(--color-card);
            box-shadow: var(--shadow-card);
        }
        .compare-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 720px;
            margin: 0;
        }
        .compare-table th,
        .compare-table td {
            padding: 16px 20px;
            text-align: left;
            border-bottom: 1px solid var(--color-border);
            font-size: 14px;
            line-height: 1.6;
        }
        .compare-table th {
            background: var(--color-primary);
            color: #fff;
            font-weight: 600;
            font-size: 14px;
            letter-spacing: 0.3px;
            white-space: nowrap;
        }
        .compare-table th:first-child {
            border-radius: 12px 0 0 0;
        }
        .compare-table th:last-child {
            border-radius: 0 12px 0 0;
        }
        .compare-table tr:last-child td {
            border-bottom: none;
        }
        .compare-table td:first-child {
            font-weight: 600;
            color: var(--color-text);
            white-space: nowrap;
        }
        .compare-table tr:hover td {
            background: var(--color-bg);
        }
        .compare-check {
            color: var(--color-secondary);
            font-size: 16px;
        }
        .compare-dash {
            color: var(--color-text-light);
        }

        /* Testimonial cards */
        .testimonial-scene-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            padding: 28px;
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .testimonial-scene-card .quote-icon {
            font-size: 28px;
            color: var(--color-secondary);
            margin-bottom: 12px;
            opacity: 0.7;
        }
        .testimonial-scene-card .quote-text {
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text);
            font-weight: 500;
            flex: 1;
            margin-bottom: 16px;
        }
        .testimonial-scene-card .client-info {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .testimonial-scene-card .client-avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            object-fit: cover;
        }
        .testimonial-scene-card .client-name {
            font-size: 15px;
            font-weight: 700;
            color: var(--color-text);
        }
        .testimonial-scene-card .client-role {
            font-size: 13px;
            color: var(--color-text-muted);
        }
        .testimonial-scene-card .badge-scene-tag {
            display: inline-block;
            font-size: 11px;
            font-weight: 600;
            color: var(--color-accent);
            background: rgba(255, 77, 94, 0.08);
            padding: 3px 10px;
            border-radius: var(--radius-pill);
            margin-bottom: 12px;
            align-self: flex-start;
        }

        /* Adaptation section */
        .adapt-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .adapt-list li {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 16px 0;
            border-bottom: 1px solid var(--color-border);
        }
        .adapt-list li:last-child {
            border-bottom: none;
        }
        .adapt-list .adapt-icon {
            width: 40px;
            height: 40px;
            flex-shrink: 0;
            background: rgba(0, 201, 167, 0.1);
            color: var(--color-secondary);
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
        }
        .adapt-list .adapt-content h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 4px;
        }
        .adapt-list .adapt-content p {
            font-size: 14px;
            color: var(--color-text-muted);
            margin: 0;
            line-height: 1.7;
        }

        /* FAQ */
        .faq-accordion .accordion-item {
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card) !important;
            overflow: hidden;
            margin-bottom: 12px;
            background: var(--color-card);
            box-shadow: var(--shadow-card);
        }
        .faq-accordion .accordion-button {
            background: var(--color-card);
            color: var(--color-text);
            font-weight: 600;
            font-size: 15px;
            padding: 18px 20px;
            border: none;
            box-shadow: none;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .faq-accordion .accordion-button::after {
            margin-left: auto;
            flex-shrink: 0;
            filter: none;
            width: 16px;
            height: 16px;
            background-size: 16px;
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            background: var(--color-card);
            color: var(--color-text);
            box-shadow: none;
        }
        .faq-accordion .accordion-button:focus {
            box-shadow: 0 0 0 2px var(--color-secondary);
            border-radius: var(--radius-card);
        }
        .faq-accordion .accordion-button .faq-q-icon {
            color: var(--color-secondary);
            font-size: 18px;
            flex-shrink: 0;
        }
        .faq-accordion .accordion-body {
            font-size: 15px;
            color: var(--color-text-muted);
            line-height: 1.7;
            padding: 0 20px 18px 50px;
        }

        /* CTA section */
        .cta-section-scenes {
            background: var(--color-primary);
            position: relative;
            overflow: hidden;
        }
        .cta-section-scenes::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 201, 167, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-panel-scenes {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }
        .cta-panel-scenes .cta-title {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
            line-height: 1.3;
        }
        .cta-panel-scenes .cta-desc {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.75);
            margin: 0;
            max-width: 500px;
            line-height: 1.7;
        }
        .cta-panel-scenes .cta-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            flex-shrink: 0;
        }

        /* Footer */
        .site-footer {
            background: var(--color-primary);
            color: rgba(255, 255, 255, 0.8);
            padding: 56px 0 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 32px;
            margin-bottom: 36px;
        }
        .footer-brand {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 300px;
        }
        .site-footer h5 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .site-footer ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .site-footer ul li {
            margin-bottom: 10px;
        }
        .site-footer ul li a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
            transition: var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .site-footer ul li a:hover {
            color: var(--color-gold);
        }
        .footer-divider {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-copyright {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom-links {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
        .footer-bottom-links a {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition-base);
        }
        .footer-bottom-links a:hover {
            color: var(--color-gold);
        }

        /* Responsive */
        @media (max-width: 991.98px) {
            .nav-menu-desktop {
                display: none;
            }
            .hamburger-btn {
                display: flex;
            }
            .header-actions .btn-primary-kuaizhibo.d-none.d-md-inline-flex {
                display: none !important;
            }
            .scene-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 767.98px) {
            section {
                padding: var(--section-padding-mobile) 0;
            }
            .section-title {
                font-size: 26px;
            }
            .scene-grid {
                grid-template-columns: 1fr;
            }
            .page-header-scenes .h1-scenes {
                font-size: 28px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-divider {
                flex-direction: column;
                align-items: flex-start;
            }
            .cta-panel-scenes {
                flex-direction: column;
                align-items: flex-start;
            }
            .cta-panel-scenes .cta-actions {
                width: 100%;
            }
            .cta-panel-scenes .cta-actions .btn-kuaizhibo {
                width: 100%;
                justify-content: center;
            }
        }

        @media (max-width: 575.98px) {
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
            .page-header-scenes .h1-scenes {
                font-size: 24px;
            }
            .page-header-scenes .lead-scenes {
                font-size: 14px;
            }
            .section-title {
                font-size: 22px;
            }
            .card-kuaizhibo .card-body,
            .scene-card .scene-body {
                padding: 18px;
            }
            .btn-kuaizhibo {
                width: 100%;
                justify-content: center;
            }
            .cta-actions .btn-kuaizhibo {
                width: 100%;
            }
        }

/* roulang page: category6 */
:root {
            --color-primary: #1E1830;
            --color-primary-light: #2A2338;
            --color-primary-lighter: #251C3A;
            --color-accent: #FF4D5E;
            --color-accent-hover: #E63A4B;
            --color-secondary: #00C9A7;
            --color-gold: #F5B841;
            --color-bg: #FAF7F2;
            --color-card: #FFFFFF;
            --color-text: #1A1423;
            --color-text-muted: #5A5560;
            --color-text-light: #8A8490;
            --color-border: #E8E2DA;
            --color-border-light: rgba(255, 255, 255, 0.06);
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-pill: 50px;
            --shadow-card: 0 4px 12px rgba(26, 20, 35, 0.05);
            --shadow-card-hover: 0 12px 28px rgba(26, 20, 35, 0.12);
            --shadow-dark: 0 8px 20px rgba(0, 0, 0, 0.25);
            --shadow-hero: 0 16px 40px rgba(0, 0, 0, 0.35);
            --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
            --font-numeric: "Inter", "Roboto", system-ui, sans-serif;
            --section-padding: 72px;
            --section-padding-mobile: 48px;
            --container-max: 1200px;
            --transition-base: all 0.25s ease;
            --transition-smooth: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--color-text);
            background-color: var(--color-bg);
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--color-accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        section {
            padding: var(--section-padding) 0;
        }
        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.5px;
            color: var(--color-secondary);
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-text);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .section-desc {
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text-muted);
            max-width: 720px;
            margin-bottom: 32px;
        }
        .section-desc.light {
            color: rgba(255, 255, 255, 0.75);
        }
        .btn-kuaizhibo {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            border: none;
            cursor: pointer;
            transition: var(--transition-base);
            text-decoration: none;
            white-space: nowrap;
        }
        .btn-kuaizhibo:focus-visible {
            outline: 2px solid var(--color-secondary);
            outline-offset: 2px;
        }
        .btn-primary-kuaizhibo {
            background-color: var(--color-accent);
            color: #fff;
            box-shadow: 0 4px 12px rgba(255, 77, 94, 0.3);
        }
        .btn-primary-kuaizhibo:hover {
            background-color: var(--color-accent-hover);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(255, 77, 94, 0.4);
        }
        .btn-primary-kuaizhibo:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(255, 77, 94, 0.3);
        }
        .btn-secondary-kuaizhibo {
            background-color: transparent;
            color: var(--color-text);
            border: 1.5px solid var(--color-text);
        }
        .btn-secondary-kuaizhibo:hover {
            background-color: var(--color-text);
            color: #fff;
            transform: translateY(-1px);
        }
        .btn-secondary-kuaizhibo.light {
            border-color: rgba(255, 255, 255, 0.7);
            color: #fff;
        }
        .btn-secondary-kuaizhibo.light:hover {
            background-color: #fff;
            color: var(--color-primary);
            border-color: #fff;
        }
        .btn-outline-kuaizhibo {
            background-color: transparent;
            color: var(--color-text);
            border: 1.5px solid var(--color-border);
        }
        .btn-outline-kuaizhibo:hover {
            border-color: var(--color-text);
            color: var(--color-text);
        }
        .btn-lg-kuaizhibo {
            padding: 14px 32px;
            font-size: 16px;
        }
        .btn-sm-kuaizhibo {
            padding: 8px 16px;
            font-size: 13px;
        }
        .card-kuaizhibo {
            background: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition-smooth);
        }
        .card-kuaizhibo:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .badge-kuaizhibo {
            display: inline-block;
            padding: 4px 10px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            line-height: 1.4;
            letter-spacing: 0.3px;
        }
        .badge-primary {
            background-color: rgba(255, 77, 94, 0.12);
            color: var(--color-accent);
        }
        .badge-secondary {
            background-color: rgba(0, 201, 167, 0.12);
            color: var(--color-secondary);
        }
        .badge-gold {
            background-color: rgba(245, 184, 65, 0.18);
            color: #C88400;
        }
        .badge-dark {
            background-color: var(--color-primary);
            color: #fff;
        }
        .header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: #fff;
        }
        .header-top-bar {
            background: var(--color-primary);
            height: 36px;
            display: flex;
            align-items: center;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.85);
        }
        .header-top-bar .container-custom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }
        .header-top-links a {
            color: rgba(255, 255, 255, 0.7);
            margin-left: 16px;
            font-size: 12px;
        }
        .header-top-links a:hover {
            color: #fff;
        }
        .main-header {
            background: #fff;
            box-shadow: 0 1px 0 var(--color-border);
            height: 72px;
            display: flex;
            align-items: center;
        }
        .main-header .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .logo-wrapper {
            display: flex;
            align-items: center;
            gap: 8px;
            text-decoration: none;
            color: var(--color-primary);
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: var(--color-accent);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 20px;
        }
        .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: -0.5px;
        }
        .nav-menu-desktop {
            list-style: none;
            display: flex;
            align-items: center;
            gap: 28px;
            margin: 0;
            padding: 0;
        }
        .nav-menu-desktop li a {
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text);
            padding: 8px 0;
            position: relative;
        }
        .nav-menu-desktop li a:hover {
            color: var(--color-accent);
        }
        .nav-menu-desktop li a.active {
            color: var(--color-accent);
        }
        .nav-menu-desktop li a.active::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            height: 2px;
            background: var(--color-secondary);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .header-icon-btn {
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: none;
            background: transparent;
            color: var(--color-text);
            font-size: 18px;
            cursor: pointer;
            border-radius: 8px;
            transition: var(--transition-base);
        }
        .header-icon-btn:hover {
            background: var(--color-bg);
        }
        .hamburger-btn {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            border: none;
            background: transparent;
            color: var(--color-text);
            font-size: 22px;
            cursor: pointer;
            border-radius: 8px;
        }
        .mobile-menu {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(26, 20, 35, 0.98);
            z-index: 2000;
            display: none;
            flex-direction: column;
            padding: 24px;
        }
        .mobile-menu.active {
            display: flex;
        }
        .mobile-menu .mobile-menu-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 40px;
        }
        .mobile-menu .mobile-menu-header .logo-text {
            color: #fff;
        }
        .mobile-menu .mobile-menu-close {
            background: transparent;
            border: none;
            color: #fff;
            font-size: 24px;
            cursor: pointer;
        }
        .mobile-menu ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .mobile-menu ul li a {
            display: block;
            color: #fff;
            font-size: 20px;
            padding: 20px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .breadcrumb-kuaizhibo {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: var(--color-text-muted);
            margin-bottom: 16px;
        }
        .breadcrumb-kuaizhibo a {
            color: var(--color-text-muted);
        }
        .breadcrumb-kuaizhibo a:hover {
            color: var(--color-accent);
        }
        .breadcrumb-separator {
            color: var(--color-text-light);
        }
        .page-hero {
            padding: 48px 0 32px;
            background: #fff;
            border-bottom: 1px solid var(--color-border);
        }
        .page-hero h1 {
            font-size: 40px;
            font-weight: 800;
            letter-spacing: -1px;
            color: var(--color-text);
            margin-bottom: 12px;
        }
        .page-hero .lead {
            font-size: 18px;
            color: var(--color-text-muted);
            max-width: 760px;
        }
        .resource-card {
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition-smooth);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .resource-card:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .resource-card .card-img {
            height: 160px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .resource-card .card-body {
            padding: 20px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .resource-card .card-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-text);
        }
        .resource-card .card-desc {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
            flex: 1;
        }
        .resource-card .card-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 16px;
            padding-top: 16px;
            border-top: 1px solid var(--color-border);
        }
        .resource-card .btn-text {
            color: var(--color-accent);
            font-size: 14px;
            font-weight: 600;
            text-decoration: none;
        }
        .resource-card .btn-text:hover {
            color: var(--color-accent-hover);
        }
        .featured-download {
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            padding: 32px;
        }
        .featured-download-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid var(--color-border);
        }
        .featured-download-item:last-child {
            border-bottom: none;
        }
        .featured-download-icon {
            width: 48px;
            height: 48px;
            border-radius: 10px;
            background: rgba(0, 201, 167, 0.1);
            color: var(--color-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            flex-shrink: 0;
        }
        .tool-card {
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            padding: 24px;
            transition: var(--transition-base);
            height: 100%;
        }
        .tool-card:hover {
            border-color: var(--color-secondary);
            box-shadow: var(--shadow-card-hover);
        }
        .tool-card .tool-icon {
            font-size: 28px;
            color: var(--color-secondary);
            margin-bottom: 12px;
        }
        .tool-card h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .tool-card p {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
        }
        .subscribe-section {
            background: var(--color-primary);
            border-radius: var(--radius-card);
            padding: 48px;
            text-align: center;
            color: #fff;
        }
        .subscribe-section h2 {
            color: #fff;
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .subscribe-section p {
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 24px;
        }
        .subscribe-form {
            display: flex;
            gap: 12px;
            justify-content: center;
            max-width: 520px;
            margin: 0 auto;
        }
        .subscribe-form input[type="email"] {
            flex: 1;
            height: 48px;
            border-radius: var(--radius-btn);
            border: 1px solid rgba(255, 255, 255, 0.2);
            background: rgba(255, 255, 255, 0.1);
            padding: 0 16px;
            color: #fff;
            font-size: 15px;
        }
        .subscribe-form input[type="email"]::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }
        .subscribe-form input[type="email"]:focus {
            border-color: var(--color-secondary);
            box-shadow: 0 0 0 3px rgba(0, 201, 167, 0.2);
        }
        .cta-section {
            text-align: center;
            padding: 64px 0;
        }
        .cta-section h2 {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: var(--color-text-muted);
            margin-bottom: 24px;
        }
        .site-footer {
            background: var(--color-primary);
            color: #fff;
            padding: 48px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .footer-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
        }
        .footer-grid h5 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-grid ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-grid ul li {
            margin-bottom: 8px;
        }
        .footer-grid ul li a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
        }
        .footer-grid ul li a:hover {
            color: #fff;
        }
        .footer-divider {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 16px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-copyright {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom-links {
            display: flex;
            gap: 16px;
        }
        .footer-bottom-links a {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
        }
        .footer-bottom-links a:hover {
            color: #fff;
        }
        @media (max-width: 991.98px) {
            .nav-menu-desktop {
                display: none;
            }
            .header-actions .d-none.d-md-inline-flex {
                display: none !important;
            }
            .hamburger-btn {
                display: flex;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 767.98px) {
            section {
                padding: var(--section-padding-mobile) 0;
            }
            .section-title {
                font-size: 26px;
            }
            .page-hero h1 {
                font-size: 32px;
            }
            .subscribe-section {
                padding: 32px 20px;
            }
            .subscribe-form {
                flex-direction: column;
            }
            .subscribe-form input[type="email"] {
                width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        @media (max-width: 575.98px) {
            .page-hero h1 {
                font-size: 28px;
            }
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
            .resource-card .card-img {
                height: 140px;
            }
            .featured-download-item {
                flex-direction: column;
                align-items: flex-start;
            }
            .featured-download-icon {
                margin-bottom: 8px;
            }
            .btn-kuaizhibo {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category5 */
:root {
            --color-primary: #1E1830;
            --color-primary-light: #2A2338;
            --color-primary-lighter: #251C3A;
            --color-accent: #FF4D5E;
            --color-accent-hover: #E63A4B;
            --color-secondary: #00C9A7;
            --color-gold: #F5B841;
            --color-bg: #FAF7F2;
            --color-card: #FFFFFF;
            --color-text: #1A1423;
            --color-text-muted: #5A5560;
            --color-text-light: #8A8490;
            --color-border: #E8E2DA;
            --color-border-light: rgba(255, 255, 255, 0.06);
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-pill: 50px;
            --shadow-card: 0 4px 12px rgba(26, 20, 35, 0.05);
            --shadow-card-hover: 0 12px 28px rgba(26, 20, 35, 0.12);
            --shadow-dark: 0 8px 20px rgba(0, 0, 0, 0.25);
            --shadow-hero: 0 16px 40px rgba(0, 0, 0, 0.35);
            --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
            --font-numeric: "Inter", "Roboto", system-ui, sans-serif;
            --section-padding: 72px;
            --section-padding-mobile: 48px;
            --container-max: 1200px;
            --transition-base: all 0.25s ease;
            --transition-smooth: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--color-text);
            background-color: var(--color-bg);
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--color-accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input {
            font-family: inherit;
            font-size: inherit;
        }
        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        section {
            padding: var(--section-padding) 0;
        }
        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.5px;
            color: var(--color-secondary);
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-text);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .section-desc {
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text-muted);
            max-width: 720px;
            margin-bottom: 32px;
        }
        .section-desc.light {
            color: rgba(255, 255, 255, 0.75);
        }
        .btn-kuaizhibo {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            border: none;
            cursor: pointer;
            transition: var(--transition-base);
            text-decoration: none;
            white-space: nowrap;
        }
        .btn-kuaizhibo:focus-visible {
            outline: 2px solid var(--color-secondary);
            outline-offset: 2px;
        }
        .btn-primary-kuaizhibo {
            background-color: var(--color-accent);
            color: #fff;
            box-shadow: 0 4px 12px rgba(255, 77, 94, 0.3);
        }
        .btn-primary-kuaizhibo:hover {
            background-color: var(--color-accent-hover);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(255, 77, 94, 0.4);
        }
        .btn-primary-kuaizhibo:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(255, 77, 94, 0.3);
        }
        .btn-secondary-kuaizhibo {
            background-color: transparent;
            color: var(--color-text);
            border: 1.5px solid var(--color-text);
        }
        .btn-secondary-kuaizhibo:hover {
            background-color: var(--color-text);
            color: #fff;
            transform: translateY(-1px);
        }
        .btn-secondary-kuaizhibo.light {
            border-color: rgba(255, 255, 255, 0.7);
            color: #fff;
        }
        .btn-secondary-kuaizhibo.light:hover {
            background-color: #fff;
            color: var(--color-primary);
            border-color: #fff;
        }
        .btn-outline-kuaizhibo {
            background-color: transparent;
            color: var(--color-text);
            border: 1.5px solid var(--color-border);
        }
        .btn-outline-kuaizhibo:hover {
            border-color: var(--color-text);
            color: var(--color-text);
        }
        .btn-lg-kuaizhibo {
            padding: 14px 32px;
            font-size: 16px;
        }
        .btn-sm-kuaizhibo {
            padding: 8px 16px;
            font-size: 13px;
        }
        .card-kuaizhibo {
            background: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition-base);
        }
        .card-kuaizhibo:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .badge-kuaizhibo {
            display: inline-block;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.3px;
            line-height: 1.5;
            background-color: rgba(0, 201, 167, 0.12);
            color: #008F75;
        }
        .badge-accent {
            background-color: rgba(255, 77, 94, 0.1);
            color: var(--color-accent);
        }
        .badge-gold {
            background-color: rgba(245, 184, 65, 0.15);
            color: #B88317;
        }
        .text-accent {
            color: var(--color-accent);
        }
        .text-secondary {
            color: var(--color-secondary);
        }
        .text-gold {
            color: var(--color-gold);
        }

        /* Header / Navigation */
        .main-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: #fff;
            box-shadow: 0 1px 0 var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 20px;
        }
        .logo-wrapper {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: var(--color-primary);
            color: #fff;
            font-weight: 700;
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            letter-spacing: -0.5px;
        }
        .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: -0.3px;
        }
        .nav-menu-desktop {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-menu-desktop li {
            margin: 0;
        }
        .nav-menu-desktop a {
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text);
            padding: 4px 0;
            position: relative;
            white-space: nowrap;
        }
        .nav-menu-desktop a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--color-secondary);
            transition: var(--transition-base);
            border-radius: 1px;
        }
        .nav-menu-desktop a:hover {
            color: var(--color-accent);
        }
        .nav-menu-desktop a:hover::after,
        .nav-menu-desktop a.active::after {
            width: 100%;
        }
        .nav-menu-desktop a.active {
            color: var(--color-accent);
            font-weight: 600;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .header-icon-btn {
            width: 40px;
            height: 40px;
            border-radius: 8px;
            border: none;
            background: transparent;
            color: var(--color-text);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition-base);
            font-size: 16px;
        }
        .header-icon-btn:hover {
            background: rgba(26, 20, 35, 0.05);
            color: var(--color-accent);
        }
        .hamburger-btn {
            width: 44px;
            height: 44px;
            border-radius: 8px;
            border: none;
            background: transparent;
            color: var(--color-text);
            display: none;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-size: 20px;
            transition: var(--transition-base);
        }
        .hamburger-btn:hover {
            background: rgba(26, 20, 35, 0.05);
        }
        .mobile-drawer {
            display: none;
            background: var(--color-primary);
            padding: 16px 24px 24px;
            border-radius: 0 0 12px 12px;
        }
        .mobile-drawer.open {
            display: block;
        }
        .mobile-drawer ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .mobile-drawer li {
            margin: 0;
        }
        .mobile-drawer a {
            display: block;
            padding: 12px 0;
            color: rgba(255, 255, 255, 0.85);
            font-size: 16px;
            font-weight: 500;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: var(--transition-base);
        }
        .mobile-drawer a:hover {
            color: #fff;
            padding-left: 8px;
        }
        .mobile-drawer a.active {
            color: var(--color-accent);
            font-weight: 600;
        }

        /* Breadcrumb */
        .breadcrumb-kuaizhibo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--color-text-muted);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }
        .breadcrumb-kuaizhibo a {
            color: var(--color-text-muted);
            transition: var(--transition-base);
        }
        .breadcrumb-kuaizhibo a:hover {
            color: var(--color-accent);
        }
        .breadcrumb-kuaizhibo .sep {
            color: var(--color-text-light);
            font-size: 11px;
        }
        .breadcrumb-kuaizhibo .current {
            color: var(--color-accent);
            font-weight: 600;
        }

        /* Hero-like section for category header */
        .category-header {
            background: var(--color-primary);
            padding: 56px 0 48px;
            position: relative;
            overflow: hidden;
        }
        .category-header::after {
            content: '';
            position: absolute;
            bottom: 0;
            right: 0;
            width: 420px;
            height: 280px;
            background: radial-gradient(ellipse at center, rgba(0, 201, 167, 0.12), transparent 70%);
            pointer-events: none;
        }
        .category-header .breadcrumb-kuaizhibo a,
        .category-header .breadcrumb-kuaizhibo .sep {
            color: rgba(255, 255, 255, 0.6);
        }
        .category-header .breadcrumb-kuaizhibo .current {
            color: var(--color-secondary);
        }
        .category-header h1 {
            font-size: 36px;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.5px;
            margin-bottom: 14px;
            line-height: 1.3;
        }
        .category-header .header-desc {
            font-size: 16px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.78);
            max-width: 760px;
            margin-bottom: 0;
        }

        /* Case cards */
        .case-card {
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .case-card:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .case-card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            border-radius: 0;
        }
        .case-card-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .case-card-badge {
            display: inline-block;
            padding: 3px 10px;
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 600;
            background: rgba(0, 201, 167, 0.1);
            color: #008F75;
            margin-bottom: 12px;
            width: fit-content;
        }
        .case-card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 10px;
            line-height: 1.35;
        }
        .case-card-metrics {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 12px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--color-border);
        }
        .case-metric {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .case-metric-num {
            font-family: var(--font-numeric);
            font-size: 20px;
            font-weight: 700;
            color: var(--color-accent);
            line-height: 1.2;
        }
        .case-metric-label {
            font-size: 12px;
            color: var(--color-text-muted);
            line-height: 1.3;
        }
        .case-card-desc {
            font-size: 14px;
            line-height: 1.7;
            color: var(--color-text-muted);
            flex: 1;
            margin-bottom: 0;
        }

        /* Data showcase */
        .data-showcase {
            background: var(--color-primary);
            border-radius: var(--radius-card);
            padding: 40px 32px;
            position: relative;
            overflow: hidden;
        }
        .data-showcase::before {
            content: '';
            position: absolute;
            top: -60px;
            left: -60px;
            width: 220px;
            height: 220px;
            background: radial-gradient(circle, rgba(255, 77, 94, 0.15), transparent 70%);
            pointer-events: none;
        }
        .data-showcase::after {
            content: '';
            position: absolute;
            bottom: -60px;
            right: -60px;
            width: 220px;
            height: 220px;
            background: radial-gradient(circle, rgba(0, 201, 167, 0.12), transparent 70%);
            pointer-events: none;
        }
        .data-showcase-inner {
            position: relative;
            z-index: 1;
        }
        .data-showcase h2 {
            color: #fff;
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .data-showcase p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 15px;
            line-height: 1.7;
            max-width: 680px;
            margin-bottom: 28px;
        }
        .data-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .data-item {
            text-align: center;
            padding: 16px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: 10px;
            border: 1px solid rgba(255, 255, 255, 0.06);
            transition: var(--transition-base);
        }
        .data-item:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.12);
        }
        .data-item-num {
            font-family: var(--font-numeric);
            font-size: 30px;
            font-weight: 700;
            color: var(--color-gold);
            line-height: 1.3;
        }
        .data-item-label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.65);
            margin-top: 6px;
            line-height: 1.4;
        }

        /* Logo wall */
        .logo-wall {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: center;
            gap: 24px 36px;
        }
        .logo-item {
            font-size: 18px;
            font-weight: 600;
            color: var(--color-text-muted);
            padding: 18px 28px;
            border: 1px solid var(--color-border);
            border-radius: 10px;
            background: #fff;
            transition: var(--transition-base);
            white-space: nowrap;
            letter-spacing: -0.2px;
        }
        .logo-item:hover {
            border-color: var(--color-accent);
            color: var(--color-text);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        /* Testimonial cards */
        .testimonial-card {
            background: #fff;
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            padding: 28px;
            transition: var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .testimonial-card:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-card-hover);
        }
        .testimonial-quote {
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text);
            margin-bottom: 20px;
            flex: 1;
            font-style: italic;
            position: relative;
            padding-left: 20px;
        }
        .testimonial-quote::before {
            content: '\201C';
            position: absolute;
            left: 0;
            top: -4px;
            font-size: 40px;
            color: var(--color-accent);
            font-style: normal;
            font-weight: 700;
            line-height: 1;
        }
        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .testimonial-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 600;
            font-size: 18px;
            flex-shrink: 0;
            font-family: var(--font-numeric);
        }
        .testimonial-info h5 {
            font-size: 15px;
            font-weight: 600;
            margin: 0 0 2px;
            color: var(--color-text);
        }
        .testimonial-info span {
            font-size: 13px;
            color: var(--color-text-muted);
        }
        .testimonial-tag {
            display: inline-block;
            padding: 3px 10px;
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 600;
            background: rgba(245, 184, 65, 0.15);
            color: #B88317;
            margin-bottom: 12px;
            width: fit-content;
        }

        /* CTA section */
        .cta-section {
            padding: 0;
        }
        .cta-box {
            background: var(--color-primary);
            border-radius: 16px;
            padding: 48px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -40px;
            width: 280px;
            height: 280px;
            background: radial-gradient(circle, rgba(255, 77, 94, 0.18), transparent 70%);
            pointer-events: none;
        }
        .cta-box::after {
            content: '';
            position: absolute;
            bottom: -60px;
            left: -40px;
            width: 240px;
            height: 240px;
            background: radial-gradient(circle, rgba(0, 201, 167, 0.12), transparent 70%);
            pointer-events: none;
        }
        .cta-box-inner {
            position: relative;
            z-index: 1;
        }
        .cta-box h2 {
            color: #fff;
            font-size: 30px;
            font-weight: 700;
            margin-bottom: 16px;
            letter-spacing: -0.3px;
        }
        .cta-box p {
            color: rgba(255, 255, 255, 0.72);
            font-size: 16px;
            line-height: 1.7;
            max-width: 580px;
            margin: 0 auto 28px;
        }
        .cta-box .btn-kuaizhibo {
            font-size: 16px;
            padding: 14px 32px;
        }

        /* Footer */
        .site-footer {
            background: var(--color-primary);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 28px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 36px;
            margin-bottom: 40px;
        }
        .footer-brand {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: -0.3px;
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 300px;
            margin: 0;
        }
        .site-footer h5 {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .site-footer ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .site-footer li {
            margin-bottom: 9px;
        }
        .site-footer a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            transition: var(--transition-base);
        }
        .site-footer a:hover {
            color: #fff;
        }
        .footer-divider {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-copyright {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }
        .footer-bottom-links {
            display: flex;
            gap: 18px;
            align-items: center;
        }
        .footer-bottom-links a {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom-links a:hover {
            color: #fff;
        }

        /* Responsive */
        @media (max-width: 992px) {
            .nav-menu-desktop {
                display: none;
            }
            .hamburger-btn {
                display: flex;
            }
            .header-actions .btn-kuaizhibo {
                display: none !important;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .data-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-header h1 {
                font-size: 28px;
            }
            .section-title {
                font-size: 26px;
            }
            section {
                padding: var(--section-padding-mobile) 0;
            }
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .data-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .logo-wall {
                gap: 14px 18px;
            }
            .logo-item {
                padding: 12px 18px;
                font-size: 15px;
            }
            .cta-box {
                padding: 36px 24px;
            }
            .cta-box h2 {
                font-size: 24px;
            }
            .category-header {
                padding: 40px 0 36px;
            }
            .category-header h1 {
                font-size: 24px;
            }
            .case-card-body {
                padding: 18px;
            }
        }
        @media (max-width: 576px) {
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
            .header-inner {
                height: 60px;
                gap: 10px;
            }
            .logo-text {
                font-size: 17px;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 16px;
            }
            .section-title {
                font-size: 22px;
            }
            .category-header h1 {
                font-size: 22px;
            }
            .data-item-num {
                font-size: 24px;
            }
            .case-card-metrics {
                gap: 10px;
            }
            .case-metric-num {
                font-size: 17px;
            }
            .footer-divider {
                flex-direction: column;
                text-align: center;
            }
            .footer-bottom-links {
                flex-wrap: wrap;
                justify-content: center;
            }
        }

/* roulang page: category4 */
:root {
            --color-primary: #1E1830;
            --color-primary-light: #2A2338;
            --color-primary-lighter: #251C3A;
            --color-accent: #FF4D5E;
            --color-accent-hover: #E63A4B;
            --color-secondary: #00C9A7;
            --color-gold: #F5B841;
            --color-bg: #FAF7F2;
            --color-card: #FFFFFF;
            --color-text: #1A1423;
            --color-text-muted: #5A5560;
            --color-text-light: #8A8490;
            --color-border: #E8E2DA;
            --color-border-light: rgba(255, 255, 255, 0.06);
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-pill: 50px;
            --shadow-card: 0 4px 12px rgba(26, 20, 35, 0.05);
            --shadow-card-hover: 0 12px 28px rgba(26, 20, 35, 0.12);
            --shadow-dark: 0 8px 20px rgba(0, 0, 0, 0.25);
            --shadow-hero: 0 16px 40px rgba(0, 0, 0, 0.35);
            --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
            --font-numeric: "Inter", "Roboto", system-ui, sans-serif;
            --section-padding: 72px;
            --section-padding-mobile: 48px;
            --container-max: 1200px;
            --transition-base: all 0.25s ease;
            --transition-smooth: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--color-text);
            background-color: var(--color-bg);
            overflow-x: hidden;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition-base);
        }

        a:hover {
            color: var(--color-accent);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input {
            font-family: inherit;
            font-size: inherit;
        }

        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        section {
            padding: var(--section-padding) 0;
        }

        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.5px;
            color: var(--color-secondary);
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-text);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .section-desc {
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text-muted);
            max-width: 720px;
            margin-bottom: 32px;
        }

        .section-desc.light {
            color: rgba(255, 255, 255, 0.75);
        }

        .btn-kuaizhibo {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            border: none;
            cursor: pointer;
            transition: var(--transition-base);
            text-decoration: none;
            white-space: nowrap;
        }

        .btn-kuaizhibo:focus-visible {
            outline: 2px solid var(--color-secondary);
            outline-offset: 2px;
        }

        .btn-primary-kuaizhibo {
            background-color: var(--color-accent);
            color: #fff;
            box-shadow: 0 4px 12px rgba(255, 77, 94, 0.3);
        }

        .btn-primary-kuaizhibo:hover {
            background-color: var(--color-accent-hover);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(255, 77, 94, 0.4);
        }

        .btn-primary-kuaizhibo:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(255, 77, 94, 0.3);
        }

        .btn-secondary-kuaizhibo {
            background-color: transparent;
            color: var(--color-text);
            border: 1.5px solid var(--color-text);
        }

        .btn-secondary-kuaizhibo:hover {
            background-color: var(--color-text);
            color: #fff;
            transform: translateY(-1px);
        }

        .btn-secondary-kuaizhibo.light {
            border-color: rgba(255, 255, 255, 0.7);
            color: #fff;
        }

        .btn-secondary-kuaizhibo.light:hover {
            background-color: #fff;
            color: var(--color-primary);
            border-color: #fff;
        }

        .btn-outline-kuaizhibo {
            background-color: transparent;
            color: var(--color-text);
            border: 1.5px solid var(--color-border);
        }

        .btn-outline-kuaizhibo:hover {
            border-color: var(--color-text);
            color: var(--color-text);
        }

        .btn-lg-kuaizhibo {
            padding: 14px 32px;
            font-size: 16px;
        }

        .btn-sm-kuaizhibo {
            padding: 8px 16px;
            font-size: 13px;
        }

        .card-kuaizhibo {
            background: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition-smooth);
        }

        .card-kuaizhibo:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
        }

        .badge-kuaizhibo {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.3px;
            background-color: rgba(0, 201, 167, 0.1);
            color: #00A187;
        }

        .badge-kuaizhibo.accent {
            background-color: rgba(255, 77, 94, 0.1);
            color: var(--color-accent);
        }

        .badge-kuaizhibo.gold {
            background-color: rgba(245, 184, 65, 0.15);
            color: #C9972A;
        }

        /* Header / Navigation */
        .promo-bar {
            background-color: var(--color-primary);
            color: #fff;
            font-size: 12px;
            padding: 8px 0;
            text-align: center;
            letter-spacing: 0.3px;
        }

        .promo-bar a {
            color: var(--color-gold);
            font-weight: 600;
            margin-left: 12px;
        }

        .promo-bar a:hover {
            color: #FFD166;
        }

        .main-header {
            background: #fff;
            border-bottom: 1px solid var(--color-border);
            position: sticky;
            top: 0;
            z-index: 1050;
            box-shadow: 0 1px 0 var(--color-border);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }

        .logo-wrapper {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            min-width: 0;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--color-primary);
            color: #fff;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 18px;
        }

        .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: -0.5px;
            white-space: nowrap;
        }

        .nav-menu-desktop {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-menu-desktop li a {
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text);
            padding: 6px 0;
            position: relative;
            display: inline-block;
            white-space: nowrap;
            text-decoration: none;
        }

        .nav-menu-desktop li a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--color-secondary);
            transition: width 0.25s ease;
            border-radius: 2px;
        }

        .nav-menu-desktop li a:hover {
            color: var(--color-accent);
        }

        .nav-menu-desktop li a:hover::after {
            width: 100%;
        }

        .nav-menu-desktop li a.active {
            color: var(--color-accent);
            font-weight: 700;
        }

        .nav-menu-desktop li a.active::after {
            width: 100%;
            background-color: var(--color-accent);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .header-icon-btn {
            width: 40px;
            height: 40px;
            border: none;
            background: transparent;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            color: var(--color-text);
            transition: var(--transition-base);
            font-size: 16px;
        }

        .header-icon-btn:hover {
            background-color: var(--color-bg);
            color: var(--color-accent);
        }

        .header-icon-btn:focus-visible {
            outline: 2px solid var(--color-secondary);
            outline-offset: 2px;
        }

        .hamburger-btn {
            display: none;
            width: 44px;
            height: 44px;
            border: none;
            background: transparent;
            border-radius: 8px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--color-text);
            transition: var(--transition-base);
        }

        .hamburger-btn:hover {
            background-color: var(--color-bg);
            color: var(--color-accent);
        }

        /* Mobile drawer */
        .drawer-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(26, 20, 35, 0.6);
            z-index: 1060;
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .drawer-overlay.active {
            display: block;
            opacity: 1;
        }

        .drawer-menu {
            position: fixed;
            top: 0;
            right: -320px;
            width: 280px;
            height: 100vh;
            background: var(--color-primary);
            z-index: 1070;
            padding: 24px 20px;
            transition: right 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            box-shadow: -8px 0 30px rgba(0, 0, 0, 0.35);
        }

        .drawer-menu.active {
            right: 0;
        }

        .drawer-menu .drawer-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 28px;
        }

        .drawer-menu .drawer-logo {
            color: #fff;
            font-size: 18px;
            font-weight: 700;
        }

        .drawer-menu .drawer-close {
            width: 40px;
            height: 40px;
            border: none;
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            border-radius: 8px;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            transition: var(--transition-base);
        }

        .drawer-menu .drawer-close:hover {
            background: rgba(255, 255, 255, 0.2);
        }

        .drawer-menu ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .drawer-menu ul li a {
            color: rgba(255, 255, 255, 0.8);
            font-size: 15px;
            padding: 12px 16px;
            border-radius: 8px;
            display: block;
            transition: var(--transition-base);
            text-decoration: none;
        }

        .drawer-menu ul li a:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }

        .drawer-menu ul li a.active {
            background: rgba(255, 77, 94, 0.2);
            color: #FF6B7A;
            font-weight: 700;
        }

        /* Breadcrumb */
        .breadcrumb-kuaizhibo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--color-text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .breadcrumb-kuaizhibo a {
            color: var(--color-text-muted);
            text-decoration: none;
            transition: var(--transition-base);
        }

        .breadcrumb-kuaizhibo a:hover {
            color: var(--color-accent);
        }

        .breadcrumb-kuaizhibo .separator {
            color: var(--color-border);
            font-size: 12px;
        }

        .breadcrumb-kuaizhibo .current {
            color: var(--color-accent);
            font-weight: 600;
        }

        /* Page hero (category header) */
        .page-header-kuaizhibo {
            padding: 56px 0 36px;
            background: linear-gradient(180deg, #FFFFFF 0%, var(--color-bg) 100%);
        }

        .page-header-kuaizhibo h1 {
            font-size: 40px;
            font-weight: 800;
            line-height: 1.25;
            color: var(--color-text);
            letter-spacing: -1px;
            margin-bottom: 16px;
        }

        .page-header-kuaizhibo .page-desc {
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text-muted);
            max-width: 780px;
        }

        /* Featured News */
        .featured-news-card {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            min-height: 380px;
            display: flex;
            align-items: flex-end;
            box-shadow: var(--shadow-dark);
            transition: var(--transition-smooth);
            text-decoration: none;
            color: #fff;
        }

        .featured-news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hero);
            color: #fff;
        }

        .featured-news-card .featured-bg {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            z-index: 0;
        }

        .featured-news-card .featured-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(26, 20, 35, 0.1) 0%, rgba(26, 20, 35, 0.85) 70%, rgba(26, 20, 35, 0.95) 100%);
            z-index: 1;
        }

        .featured-news-card .featured-content {
            position: relative;
            z-index: 2;
            padding: 32px;
            width: 100%;
        }

        .featured-news-card .featured-date {
            font-size: 13px;
            color: var(--color-gold);
            font-weight: 600;
            margin-bottom: 10px;
            display: block;
        }

        .featured-news-card .featured-title {
            font-size: 24px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 12px;
            color: #fff;
        }

        .featured-news-card .featured-excerpt {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.75);
            max-width: 640px;
            margin-bottom: 16px;
        }

        .featured-news-card .featured-link {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition-base);
        }

        .featured-news-card .featured-link:hover {
            color: var(--color-gold);
        }

        /* News list */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .news-list-item {
            background: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            padding: 24px;
            display: flex;
            gap: 20px;
            align-items: flex-start;
            transition: var(--transition-smooth);
            text-decoration: none;
            color: var(--color-text);
        }

        .news-list-item:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-1px);
            color: var(--color-text);
        }

        .news-list-item .news-thumb {
            flex-shrink: 0;
            width: 160px;
            height: 100px;
            border-radius: 8px;
            overflow: hidden;
            background-color: var(--color-bg);
        }

        .news-list-item .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .news-list-item .news-body {
            flex: 1;
            min-width: 0;
        }

        .news-list-item .news-date {
            font-size: 13px;
            color: var(--color-text-light);
            font-weight: 500;
            margin-bottom: 6px;
            display: block;
        }

        .news-list-item .news-title {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.4;
            color: var(--color-text);
            margin-bottom: 8px;
        }

        .news-list-item .news-excerpt {
            font-size: 14px;
            line-height: 1.7;
            color: var(--color-text-muted);
            margin-bottom: 10px;
        }

        .news-list-item .news-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--color-accent);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: var(--transition-base);
        }

        .news-list-item .news-link:hover {
            color: var(--color-accent-hover);
        }

        /* Tags */
        .tags-nav {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag-pill {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 500;
            background: var(--color-card);
            border: 1px solid var(--color-border);
            color: var(--color-text-muted);
            cursor: default;
            transition: var(--transition-base);
            text-decoration: none;
        }

        .tag-pill:hover {
            border-color: var(--color-secondary);
            color: #00A187;
            background: rgba(0, 201, 167, 0.05);
        }

        .tag-pill.featured {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
            font-weight: 600;
        }

        .tag-pill.featured:hover {
            background: var(--color-primary-light);
            color: #fff;
            border-color: var(--color-primary-light);
        }

        /* Subscribe */
        .subscribe-section-kuaizhibo {
            background: var(--color-primary);
            border-radius: var(--radius-card);
            padding: 40px;
            color: #fff;
        }

        .subscribe-section-kuaizhibo .section-title {
            color: #fff;
        }

        .subscribe-section-kuaizhibo .section-desc {
            color: rgba(255, 255, 255, 0.7);
        }

        .subscribe-form {
            display: flex;
            gap: 12px;
            max-width: 520px;
            flex-wrap: wrap;
        }

        .subscribe-form .form-input {
            flex: 1;
            min-width: 240px;
            height: 48px;
            padding: 0 16px;
            border-radius: var(--radius-btn);
            border: 1.5px solid rgba(255, 255, 255, 0.25);
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            font-size: 14px;
            outline: none;
            transition: var(--transition-base);
        }

        .subscribe-form .form-input::placeholder {
            color: rgba(255, 255, 255, 0.5);
        }

        .subscribe-form .form-input:focus {
            border-color: var(--color-secondary);
            box-shadow: 0 0 0 3px rgba(0, 201, 167, 0.15);
        }

        .subscribe-form .btn-primary-kuaizhibo {
            height: 48px;
            padding: 0 28px;
            white-space: nowrap;
        }

        .form-error {
            color: #FF8A94;
            font-size: 13px;
            margin-top: 6px;
            display: none;
        }

        .form-error.visible {
            display: block;
        }

        /* Tech articles */
        .tech-article-card {
            background: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition-smooth);
            text-decoration: none;
            color: var(--color-text);
            display: block;
            height: 100%;
        }

        .tech-article-card:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-2px);
            color: var(--color-text);
        }

        .tech-article-card .tech-thumb {
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--color-bg);
        }

        .tech-article-card .tech-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .tech-article-card:hover .tech-thumb img {
            transform: scale(1.03);
        }

        .tech-article-card .tech-body {
            padding: 20px;
        }

        .tech-article-card .tech-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--color-secondary);
            margin-bottom: 8px;
        }

        .tech-article-card .tech-title {
            font-size: 17px;
            font-weight: 700;
            line-height: 1.45;
            margin-bottom: 8px;
            color: var(--color-text);
        }

        .tech-article-card .tech-excerpt {
            font-size: 13px;
            line-height: 1.65;
            color: var(--color-text-muted);
            margin-bottom: 12px;
        }

        .tech-article-card .tech-link {
            font-size: 13px;
            font-weight: 600;
            color: var(--color-accent);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* CTA section */
        .cta-section-kuaizhibo {
            background: var(--color-primary);
            border-radius: var(--radius-card);
            padding: 48px 40px;
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }

        .cta-section-kuaizhibo .cta-content {
            flex: 1;
            min-width: 280px;
        }

        .cta-section-kuaizhibo .cta-title {
            font-size: 26px;
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: 10px;
            color: #fff;
        }

        .cta-section-kuaizhibo .cta-desc {
            font-size: 15px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.7);
        }

        .cta-section-kuaizhibo .cta-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            flex-shrink: 0;
        }

        /* Footer */
        .site-footer {
            background: var(--color-primary);
            color: rgba(255, 255, 255, 0.8);
            padding: 56px 0 24px;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .footer-brand {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.55);
            max-width: 320px;
        }

        .site-footer h5 {
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
            text-transform: uppercase;
        }

        .site-footer ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .site-footer ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            text-decoration: none;
            transition: var(--transition-base);
        }

        .site-footer ul li a:hover {
            color: #fff;
        }

        .footer-divider {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-copyright {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }

        .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 20px;
        }

        .footer-bottom-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 13px;
            text-decoration: none;
            transition: var(--transition-base);
        }

        .footer-bottom-links a:hover {
            color: #fff;
        }

        /* Section backgrounds */
        .section-light {
            background: #FFFFFF;
        }

        .section-tinted {
            background: var(--color-bg);
        }

        /* Responsive */
        @media (max-width: 992px) {
            .nav-menu-desktop {
                display: none;
            }
            .hamburger-btn {
                display: flex;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .page-header-kuaizhibo h1 {
                font-size: 34px;
            }
            .news-list-item .news-thumb {
                width: 120px;
                height: 80px;
            }
            .cta-section-kuaizhibo {
                padding: 36px 28px;
            }
            .subscribe-section-kuaizhibo {
                padding: 32px 24px;
            }
        }

        @media (max-width: 768px) {
            section {
                padding: var(--section-padding-mobile) 0;
            }
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
            .section-title {
                font-size: 26px;
            }
            .page-header-kuaizhibo h1 {
                font-size: 28px;
            }
            .page-header-kuaizhibo {
                padding: 36px 0 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-divider {
                flex-direction: column;
                align-items: flex-start;
            }
            .news-list-item {
                flex-direction: column;
                padding: 18px;
            }
            .news-list-item .news-thumb {
                width: 100%;
                height: 160px;
            }
            .featured-news-card {
                min-height: 280px;
            }
            .featured-news-card .featured-content {
                padding: 20px;
            }
            .featured-news-card .featured-title {
                font-size: 20px;
            }
            .cta-section-kuaizhibo {
                flex-direction: column;
                align-items: flex-start;
            }
            .subscribe-form {
                flex-direction: column;
            }
            .subscribe-form .form-input {
                min-width: 100%;
            }
        }

        @media (max-width: 576px) {
            .section-title {
                font-size: 22px;
            }
            .page-header-kuaizhibo h1 {
                font-size: 24px;
            }
            .btn-lg-kuaizhibo {
                padding: 12px 20px;
                font-size: 14px;
                width: 100%;
                justify-content: center;
            }
            .btn-kuaizhibo {
                padding: 10px 18px;
                font-size: 14px;
            }
            .cta-section-kuaizhibo .cta-title {
                font-size: 22px;
            }
            .tags-nav {
                gap: 8px;
            }
            .tag-pill {
                padding: 6px 14px;
                font-size: 12px;
            }
            .header-inner {
                height: 60px;
                gap: 12px;
            }
            .logo-text {
                font-size: 17px;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 15px;
            }
            .header-icon-btn {
                width: 36px;
                height: 36px;
                font-size: 14px;
            }
            .hamburger-btn {
                width: 40px;
                height: 40px;
                font-size: 18px;
            }
            .promo-bar {
                font-size: 11px;
                padding: 6px 0;
            }
        }

/* roulang page: category7 */
:root {
            --color-primary: #1E1830;
            --color-primary-light: #2A2338;
            --color-primary-lighter: #251C3A;
            --color-accent: #FF4D5E;
            --color-accent-hover: #E63A4B;
            --color-secondary: #00C9A7;
            --color-gold: #F5B841;
            --color-bg: #FAF7F2;
            --color-card: #FFFFFF;
            --color-text: #1A1423;
            --color-text-muted: #5A5560;
            --color-text-light: #8A8490;
            --color-border: #E8E2DA;
            --color-border-light: rgba(255, 255, 255, 0.06);
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-pill: 50px;
            --shadow-card: 0 4px 12px rgba(26, 20, 35, 0.05);
            --shadow-card-hover: 0 12px 28px rgba(26, 20, 35, 0.12);
            --shadow-dark: 0 8px 20px rgba(0, 0, 0, 0.25);
            --shadow-hero: 0 16px 40px rgba(0, 0, 0, 0.35);
            --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
            --font-numeric: "Inter", "Roboto", system-ui, sans-serif;
            --section-padding: 72px;
            --section-padding-mobile: 48px;
            --container-max: 1200px;
            --transition-base: all 0.25s ease;
            --transition-smooth: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

        /* Reset & Base */
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.75;
            color: var(--color-text);
            background-color: var(--color-bg);
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--color-accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, input, textarea {
            font-family: inherit;
            font-size: inherit;
        }
        .container-custom {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        section {
            padding: var(--section-padding) 0;
        }
        .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.5px;
            color: var(--color-secondary);
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-text);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .section-desc {
            font-size: 16px;
            line-height: 1.8;
            color: var(--color-text-muted);
            max-width: 720px;
            margin-bottom: 32px;
        }
        .section-desc.light {
            color: rgba(255, 255, 255, 0.75);
        }
        .section-head {
            margin-bottom: 40px;
        }

        /* Buttons */
        .btn-kuaizhibo {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            border: none;
            cursor: pointer;
            transition: var(--transition-base);
            text-decoration: none;
            white-space: nowrap;
        }
        .btn-kuaizhibo:focus-visible {
            outline: 2px solid var(--color-secondary);
            outline-offset: 2px;
        }
        .btn-primary-kuaizhibo {
            background-color: var(--color-accent);
            color: #fff;
            box-shadow: 0 4px 12px rgba(255, 77, 94, 0.3);
        }
        .btn-primary-kuaizhibo:hover {
            background-color: var(--color-accent-hover);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(255, 77, 94, 0.4);
        }
        .btn-primary-kuaizhibo:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(255, 77, 94, 0.3);
        }
        .btn-secondary-kuaizhibo {
            background-color: transparent;
            color: var(--color-text);
            border: 1.5px solid var(--color-text);
        }
        .btn-secondary-kuaizhibo:hover {
            background-color: var(--color-text);
            color: #fff;
            transform: translateY(-1px);
        }
        .btn-secondary-kuaizhibo.light {
            border-color: rgba(255, 255, 255, 0.7);
            color: #fff;
        }
        .btn-secondary-kuaizhibo.light:hover {
            background-color: #fff;
            color: var(--color-primary);
            border-color: #fff;
        }
        .btn-outline-kuaizhibo {
            background-color: transparent;
            color: var(--color-text);
            border: 1.5px solid var(--color-border);
        }
        .btn-outline-kuaizhibo:hover {
            border-color: var(--color-text);
            color: var(--color-text);
        }
        .btn-lg-kuaizhibo {
            padding: 14px 32px;
            font-size: 16px;
        }
        .btn-sm-kuaizhibo {
            padding: 8px 16px;
            font-size: 13px;
        }
        .btn-link-kuaizhibo {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--color-accent);
            font-weight: 600;
            font-size: 15px;
            padding: 0;
            background: none;
            border: none;
            transition: var(--transition-base);
        }
        .btn-link-kuaizhibo:hover {
            color: var(--color-accent-hover);
            gap: 10px;
        }
        .btn-link-kuaizhibo i {
            font-size: 13px;
        }

        /* Cards */
        .card-kuaizhibo {
            background: var(--color-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition-smooth);
        }
        .card-kuaizhibo:hover {
            border-color: var(--color-accent);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }

        /* Header */
        .main-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: #fff;
            box-shadow: 0 1px 0 var(--color-border);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }
        .logo-wrapper {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-wrapper:hover {
            color: var(--color-text);
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--color-primary);
            color: #fff;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 20px;
            line-height: 1;
        }
        .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: -0.3px;
        }
        .nav-menu-desktop {
            display: flex;
            align-items: center;
            list-style: none;
            margin: 0;
            padding: 0;
            gap: 28px;
        }
        .nav-menu-desktop li {
            position: relative;
        }
        .nav-menu-desktop a {
            font-size: 14px;
            font-weight: 500;
            color: var(--color-text);
            padding: 6px 0;
            position: relative;
            white-space: nowrap;
        }
        .nav-menu-desktop a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 0;
            height: 2px;
            background: var(--color-secondary);
            transition: var(--transition-base);
        }
        .nav-menu-desktop a:hover::after,
        .nav-menu-desktop a.active::after {
            width: 100%;
        }
        .nav-menu-desktop a:hover {
            color: var(--color-accent);
        }
        .nav-menu-desktop a.active {
            color: var(--color-accent);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .header-icon-btn {
            width: 40px;
            height: 40px;
            border: none;
            background: none;
            color: var(--color-text);
            font-size: 18px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            cursor: pointer;
            transition: var(--transition-base);
        }
        .header-icon-btn:hover {
            background: rgba(26, 20, 35, 0.06);
            color: var(--color-accent);
        }
        .hamburger-btn {
            width: 44px;
            height: 44px;
            border: none;
            background: none;
            color: var(--color-text);
            font-size: 20px;
            display: none;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            cursor: pointer;
            transition: var(--transition-base);
        }
        .hamburger-btn:hover {
            background: rgba(26, 20, 35, 0.06);
            color: var(--color-accent);
        }

        /* Mobile Drawer */
        .mobile-drawer {
            position: fixed;
            top: 0;
            right: -100%;
            width: 280px;
            height: 100vh;
            background: var(--color-primary);
            z-index: 1050;
            transition: right 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            padding: 24px 20px;
            overflow-y: auto;
            box-shadow: -8px 0 30px rgba(0,0,0,0.3);
        }
        .mobile-drawer.open {
            right: 0;
        }
        .drawer-close {
            background: none;
            border: none;
            color: #fff;
            font-size: 32px;
            line-height: 1;
            cursor: pointer;
            margin-left: auto;
            display: block;
            margin-bottom: 32px;
            transition: var(--transition-base);
        }
        .drawer-close:hover {
            color: var(--color-accent);
        }
        .drawer-menu {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .drawer-menu a {
            color: #fff;
            font-size: 16px;
            font-weight: 500;
            padding: 8px 0;
            border-bottom: 1px solid rgba(255,255,255,0.08);
            display: block;
        }
        .drawer-menu a:hover,
        .drawer-menu a.active {
            color: var(--color-accent);
        }
        .drawer-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.5);
            z-index: 1040;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition-base);
        }
        .drawer-overlay.show {
            opacity: 1;
            visibility: visible;
        }

        /* Page Hero (内页头部，区别于首页Hero) */
        .page-hero {
            background: var(--color-primary);
            padding: 48px 0 56px;
            position: relative;
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            right: -120px;
            top: -120px;
            width: 420px;
            height: 420px;
            border-radius: 50%;
            background: rgba(0,201,167,0.06);
            pointer-events: none;
        }
        .page-hero .breadcrumb-kuaizhibo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: rgba(255,255,255,0.6);
            margin-bottom: 24px;
            position: relative;
            z-index: 1;
        }
        .breadcrumb-kuaizhibo a {
            color: rgba(255,255,255,0.6);
        }
        .breadcrumb-kuaizhibo a:hover {
            color: var(--color-secondary);
        }
        .breadcrumb-kuaizhibo span {
            color: rgba(255,255,255,0.4);
        }
        .page-hero-title {
            font-size: 40px;
            font-weight: 700;
            line-height: 1.25;
            color: #fff;
            letter-spacing: -0.5px;
            margin-bottom: 20px;
            position: relative;
            z-index: 1;
        }
        .page-hero-desc {
            font-size: 16px;
            line-height: 1.8;
            color: rgba(255,255,255,0.75);
            max-width: 720px;
            position: relative;
            z-index: 1;
        }
        .page-hero-image {
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-dark);
            transform: rotate(2deg);
            transition: var(--transition-smooth);
            max-width: 360px;
            margin-left: auto;
            position: relative;
            z-index: 1;
        }
        .page-hero-image img {
            width: 100%;
            height: 260px;
            object-fit: cover;
        }

        /* Timeline */
        .timeline {
            position: relative;
            padding-left: 32px;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 10px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: var(--color-border);
        }
        .timeline-item {
            position: relative;
            padding-bottom: 36px;
        }
        .timeline-item:last-child {
            padding-bottom: 0;
        }
        .timeline-dot {
            position: absolute;
            left: -27px;
            top: 4px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: var(--color-secondary);
            box-shadow: 0 0 0 4px rgba(0,201,167,0.15);
        }
        .timeline-year {
            font-family: var(--font-numeric);
            font-size: 18px;
            font-weight: 700;
            color: var(--color-accent);
            margin-bottom: 6px;
        }
        .timeline-content {
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 20px 24px;
            box-shadow: var(--shadow-card);
        }
        .timeline-content h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--color-text);
        }
        .timeline-content p {
            font-size: 14px;
            color: var(--color-text-muted);
            margin: 0;
            line-height: 1.7;
        }

        /* Core Abilities */
        .ability-card {
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            box-shadow: var(--shadow-card);
            transition: var(--transition-smooth);
            height: 100%;
        }
        .ability-card:hover {
            border-color: var(--color-secondary);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .ability-icon {
            width: 52px;
            height: 52px;
            border-radius: 12px;
            background: rgba(0,201,167,0.12);
            color: var(--color-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 20px;
        }
        .ability-card h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--color-text);
        }
        .ability-card p {
            font-size: 14px;
            color: var(--color-text-muted);
            margin: 0;
            line-height: 1.7;
        }

        /* Partners */
        .partners-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
            gap: 16px;
        }
        .partner-logo {
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 20px 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            color: var(--color-text-muted);
            text-align: center;
            min-height: 80px;
            transition: var(--transition-base);
        }
        .partner-logo:hover {
            border-color: var(--color-accent);
            color: var(--color-text);
            box-shadow: var(--shadow-card-hover);
        }
        .badge-cert {
            display: inline-block;
            background: rgba(0,201,167,0.12);
            color: #0a8f7a;
            border-radius: var(--radius-pill);
            padding: 6px 16px;
            font-size: 13px;
            font-weight: 500;
            margin: 0 8px 8px 0;
        }

        /* News */
        .news-item-card {
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 24px;
            box-shadow: var(--shadow-card);
            transition: var(--transition-smooth);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .news-item-card:hover {
            border-color: var(--color-secondary);
            box-shadow: var(--shadow-card-hover);
        }
        .news-date {
            font-size: 13px;
            color: var(--color-text-light);
            margin-bottom: 10px;
            font-family: var(--font-numeric);
        }
        .news-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 12px;
            line-height: 1.4;
        }
        .news-summary {
            font-size: 14px;
            color: var(--color-text-muted);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }
        .news-more {
            margin-top: auto;
        }

        /* FAQ */
        .faq-kuaizhibo .accordion-item {
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .faq-kuaizhibo .accordion-button {
            background: var(--color-card);
            color: var(--color-text);
            font-weight: 600;
            font-size: 16px;
            padding: 20px 24px;
            border: none;
            box-shadow: none;
            border-radius: var(--radius-card);
        }
        .faq-kuaizhibo .accordion-button:not(.collapsed) {
            background: var(--color-card);
            color: var(--color-text);
            box-shadow: none;
            border-bottom: 1px solid var(--color-border);
        }
        .faq-kuaizhibo .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--color-secondary);
            outline-offset: -2px;
        }
        .faq-kuaizhibo .accordion-button::after {
            background-size: 16px;
            width: 16px;
            height: 16px;
        }
        .faq-kuaizhibo .accordion-body {
            padding: 20px 24px;
            color: var(--color-text-muted);
            font-size: 15px;
            line-height: 1.7;
        }
        .faq-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: rgba(255,77,94,0.1);
            color: var(--color-accent);
            font-size: 13px;
            margin-right: 12px;
            flex-shrink: 0;
        }

        /* Contact CTA */
        .contact-cta {
            background: var(--color-primary);
            border-radius: var(--radius-card);
            padding: 48px 40px;
            position: relative;
            overflow: hidden;
            color: #fff;
        }
        .contact-cta::after {
            content: '';
            position: absolute;
            right: -60px;
            top: -60px;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            background: rgba(255,77,94,0.08);
            pointer-events: none;
        }
        .contact-cta h2 {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }
        .contact-cta p {
            font-size: 15px;
            color: rgba(255,255,255,0.7);
            margin-bottom: 24px;
            position: relative;
            z-index: 1;
            max-width: 560px;
        }
        .contact-cta .form-inline {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }
        .contact-cta .form-control {
            background: rgba(255,255,255,0.1);
            border: 1px solid rgba(255,255,255,0.2);
            color: #fff;
            border-radius: var(--radius-btn);
            padding: 12px 16px;
            height: 48px;
            min-width: 240px;
            flex: 1;
            transition: var(--transition-base);
        }
        .contact-cta .form-control::placeholder {
            color: rgba(255,255,255,0.5);
        }
        .contact-cta .form-control:focus {
            outline: none;
            border-color: var(--color-secondary);
            box-shadow: 0 0 0 0.2rem rgba(0,201,167,0.15);
            background: rgba(255,255,255,0.15);
        }

        /* Map Section */
        .map-address-card {
            background: var(--color-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            box-shadow: var(--shadow-card);
            height: 100%;
        }
        .map-address-card h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 20px;
            color: var(--color-text);
        }
        .address-line {
            display: flex;
            gap: 12px;
            margin-bottom: 16px;
            align-items: flex-start;
            font-size: 15px;
            color: var(--color-text-muted);
        }
        .address-line i {
            color: var(--color-secondary);
            font-size: 18px;
            margin-top: 3px;
            width: 20px;
            text-align: center;
            flex-shrink: 0;
        }
        .map-embed-placeholder {
            background: var(--color-primary);
            border-radius: var(--radius-card);
            height: 100%;
            min-height: 320px;
            position: relative;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255,255,255,0.6);
            font-weight: 500;
            background-image: linear-gradient(135deg, #1E1830 0%, #251C3A 100%);
        }
        .map-embed-placeholder i {
            font-size: 48px;
            color: rgba(255,255,255,0.2);
            margin-bottom: 12px;
        }

        /* Footer */
        .site-footer {
            background: var(--color-primary);
            padding: 48px 0 24px;
            color: rgba(255,255,255,0.7);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255,255,255,0.55);
            max-width: 300px;
            margin: 0;
        }
        .site-footer h5 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .site-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer ul li {
            margin-bottom: 10px;
        }
        .site-footer ul li a {
            color: rgba(255,255,255,0.55);
            font-size: 14px;
            transition: var(--transition-base);
        }
        .site-footer ul li a:hover {
            color: var(--color-accent);
        }
        .footer-divider {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer-copyright {
            font-size: 13px;
            color: rgba(255,255,255,0.45);
        }
        .footer-bottom-links {
            display: flex;
            gap: 20px;
        }
        .footer-bottom-links a {
            font-size: 13px;
            color: rgba(255,255,255,0.45);
        }
        .footer-bottom-links a:hover {
            color: var(--color-secondary);
        }

        /* Responsive */
        @media (max-width: 992px) {
            .nav-menu-desktop {
                display: none;
            }
            .hamburger-btn {
                display: inline-flex;
            }
            .header-actions .btn-sm-kuaizhibo {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .page-hero-title {
                font-size: 34px;
            }
        }
        @media (max-width: 768px) {
            section {
                padding: var(--section-padding-mobile) 0;
            }
            .section-title {
                font-size: 26px;
            }
            .page-hero {
                padding: 32px 0 40px;
            }
            .page-hero-title {
                font-size: 28px;
            }
            .page-hero-image {
                display: none;
            }
            .timeline {
                padding-left: 24px;
            }
            .timeline::before {
                left: 6px;
            }
            .timeline-dot {
                left: -21px;
                width: 12px;
                height: 12px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .contact-cta {
                padding: 32px 24px;
            }
            .contact-cta h2 {
                font-size: 24px;
            }
            .contact-cta .form-control {
                min-width: 100%;
            }
            .map-embed-placeholder {
                min-height: 240px;
            }
        }
        @media (max-width: 576px) {
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }
            .header-inner {
                height: 64px;
            }
            .logo-text {
                font-size: 18px;
            }
            .page-hero-title {
                font-size: 26px;
            }
            .section-title {
                font-size: 24px;
            }
            .btn-kuaizhibo {
                padding: 10px 18px;
                font-size: 14px;
                width: 100%;
                text-align: center;
            }
            .btn-link-kuaizhibo {
                width: auto;
                padding: 0;
            }
            .partners-grid {
                grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
            }
            .footer-divider {
                flex-direction: column;
                align-items: flex-start;
            }
        }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}