/* roulang page: index */
:root {
            --primary: #0F766E;
            --primary-dark: #134E4A;
            --primary-light: #E9EFEC;
            --accent: #F59E0B;
            --accent-hover: #D97706;
            --bg: #F8F7F4;
            --card-bg: #FFFFFF;
            --text: #1F2937;
            --text-secondary: #6B7280;
            --border: #E5E7EB;
            --success: #10B981;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-btn: 8px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 8px 24px rgba(15, 118, 110, 0.10);
            --container-max: 1200px;
            --font-family: system-ui, -apple-system, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .25s;
        }

        a:hover {
            color: var(--primary-dark);
        }

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

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

        .section {
            padding: 88px 0;
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 8px;
        }

        .section-subtitle {
            color: var(--text-secondary);
            font-size: 16px;
            margin-bottom: 32px;
        }

        .section-divider {
            width: 40px;
            height: 4px;
            background: var(--primary);
            border-radius: 2px;
            margin-bottom: 20px;
        }

        /* ===== Buttons ===== */
        .btn {
            border-radius: var(--radius-btn);
            font-weight: 600;
            transition: all .3s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 16px;
            line-height: 1.5;
            border: 1.5px solid transparent;
            cursor: pointer;
        }

        .btn:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.18);
        }

        .btn-primary-custom {
            background: var(--accent);
            color: #1F2937;
            font-weight: 800;
            border-color: var(--accent);
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.25);
        }

        .btn-primary-custom:hover {
            background: var(--accent-hover);
            color: #111827;
            border-color: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(217, 119, 6, 0.28);
        }

        .btn-primary-custom:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(217, 119, 6, 0.3);
        }

        .btn-outline-custom {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
            font-weight: 600;
        }

        .btn-outline-custom:hover {
            background: rgba(15, 118, 110, 0.08);
            color: var(--primary-dark);
            border-color: var(--primary-dark);
        }

        .btn-header {
            background: rgba(15, 118, 110, 0.08);
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            padding: 8px 20px;
            border: 1.5px solid rgba(15, 118, 110, 0.3);
            border-radius: 6px;
        }

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

        .btn-lg {
            padding: 16px 36px;
            font-size: 17px;
        }

        .btn-sm {
            padding: 6px 14px;
            font-size: 13px;
        }

        /* ===== Header ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1040;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border);
            transition: box-shadow .3s;
            height: 68px;
        }

        .site-header.scrolled {
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 24px;
        }

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

        .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 14px;
            letter-spacing: .5px;
        }

        .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: .3px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-link {
            font-size: 15px;
            color: #4B5563;
            font-weight: 500;
            position: relative;
            padding: 6px 0;
            transition: color .25s;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--primary);
        }

        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }

        .header-cta {
            margin-left: auto;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            width: 36px;
            height: 36px;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: all .3s;
        }

        /* ===== Page Hero ===== */
        .page-hero {
            padding: 120px 0 64px;
            background: var(--bg);
            position: relative;
            overflow: hidden;
        }

        .page-hero .hero-inner {
            display: grid;
            grid-template-columns: 1.05fr 0.95fr;
            gap: 56px;
            align-items: center;
        }

        .hero-content {
            position: relative;
            z-index: 2;
        }

        .hero-content h1 {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            color: var(--text);
            letter-spacing: -0.5px;
        }

        .hero-content h1 .highlight {
            color: var(--accent);
        }

        .hero-sub {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 28px;
            max-width: 520px;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 20px;
        }

        .hero-meta {
            font-size: 13px;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 8px;
            font-variant-numeric: tabular-nums;
        }

        .hero-meta .dot {
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--success);
            display: inline-block;
        }

        .hero-visual {
            position: relative;
            z-index: 1;
        }

        .hero-image-wrap {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-hover);
            border: 1px solid rgba(255, 255, 255, 0.6);
            position: relative;
            aspect-ratio: 16/10;
            background: var(--primary-light);
        }

        .hero-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }

        .hero-badge {
            position: absolute;
            top: 16px;
            left: 16px;
            z-index: 3;
            background: var(--success);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 999px;
            display: flex;
            align-items: center;
            gap: 6px;
            box-shadow: 0 2px 8px rgba(16, 185, 129, 0.35);
        }

        .hero-badge svg {
            width: 14px;
            height: 14px;
        }

        .hero-decor {
            position: absolute;
            top: -40px;
            right: -60px;
            width: 400px;
            height: 400px;
            background: var(--primary-light);
            border-radius: 50%;
            z-index: 0;
            opacity: 0.6;
        }

        .hero-dots {
            position: absolute;
            bottom: 30px;
            right: 30px;
            width: 120px;
            height: 80px;
            background-image: radial-gradient(rgba(15, 118, 110, 0.2) 1px, transparent 1px);
            background-size: 12px 12px;
            z-index: 0;
            opacity: 0.5;
            border-radius: var(--radius-md);
        }

        /* ===== Metrics Bar ===== */
        .metrics-bar {
            background: var(--card-bg);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            padding: 28px 0;
        }

        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0;
        }

        .metric-item {
            text-align: center;
            padding: 8px 16px;
            border-right: 1px solid var(--border);
        }

        .metric-item:last-child {
            border-right: none;
        }

        .metric-value {
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
            font-variant-numeric: tabular-nums;
            margin-bottom: 2px;
        }

        .metric-label {
            font-size: 13px;
            color: var(--text-secondary);
        }

        /* ===== Features Cards ===== */
        .features-section {
            background: var(--bg);
            padding: 88px 0;
        }

        .features-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin-top: 32px;
        }

        .feature-card {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            padding: 28px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: transform .3s, box-shadow .3s;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }

        .feature-card .icon-box {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            margin-bottom: 4px;
        }

        .feature-card .icon-box svg {
            width: 24px;
            height: 24px;
        }

        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin: 0;
        }

        .feature-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
            flex: 1;
        }

        .feature-card.feature-lg {
            grid-row: span 2;
            background: var(--primary-dark);
            color: #fff;
            border-color: transparent;
        }

        .feature-card.feature-lg .icon-box {
            background: rgba(255, 255, 255, 0.1);
            color: #5EEAD4;
        }

        .feature-card.feature-lg h3 {
            color: #fff;
            font-size: 20px;
        }

        .feature-card.feature-lg p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 15px;
        }

        .feature-card.feature-lg .feature-list {
            list-style: none;
            padding: 0;
            margin: 8px 0 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .feature-card.feature-lg .feature-list li {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.85);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .feature-card.feature-lg .feature-list li svg {
            width: 16px;
            height: 16px;
            color: #5EEAD4;
            flex-shrink: 0;
        }

        /* ===== Carousel ===== */
        .carousel-section {
            background: var(--primary-light);
            padding: 88px 0;
        }

        .carousel-wrap {
            background: transparent;
            border-radius: var(--radius-lg);
            padding: 20px;
            position: relative;
        }

        .carousel-panel {
            background: #fff;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
        }

        .carousel-window {
            background: #fff;
            border-radius: var(--radius-md);
            overflow: hidden;
        }

        .carousel-window .window-bar {
            background: #F3F4F6;
            border-bottom: 1px solid var(--border);
            padding: 10px 16px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .carousel-window .window-bar span {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            display: inline-block;
        }

        .carousel-window .window-bar span:nth-child(1) {
            background: #F87171;
        }

        .carousel-window .window-bar span:nth-child(2) {
            background: #FBBF24;
        }

        .carousel-window .window-bar span:nth-child(3) {
            background: #34D399;
        }

        .carousel-window .window-content {
            padding: 0;
        }

        .carousel-window .window-content img {
            width: 100%;
            aspect-ratio: 21/10;
            object-fit: cover;
            display: block;
        }

        .carousel-caption-custom {
            padding: 24px 32px 32px;
            text-align: center;
        }

        .carousel-caption-custom h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .carousel-caption-custom p {
            font-size: 14px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
        }

        .carousel-indicators-custom {
            display: flex;
            justify-content: center;
            gap: 8px;
            margin-top: 20px;
            margin-bottom: 0;
        }

        .carousel-indicators-custom button {
            width: 10px;
            height: 10px;
            border-radius: 999px;
            border: none;
            background: rgba(15, 118, 110, 0.3);
            transition: all .3s;
            padding: 0;
        }

        .carousel-indicators-custom button.active {
            width: 28px;
            background: var(--primary);
        }

        .carousel-control-custom {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(15, 118, 110, 0.15);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            transition: all .3s;
            border: none;
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            z-index: 5;
        }

        .carousel-control-custom:hover {
            background: var(--primary);
            color: #fff;
        }

        .carousel-control-prev-custom {
            left: 10px;
        }

        .carousel-control-next-custom {
            right: 10px;
        }

        /* ===== System Requirements ===== */
        .sys-section {
            background: var(--primary-dark);
            padding: 88px 0;
            color: #fff;
        }

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

        .sys-section .section-subtitle {
            color: rgba(255, 255, 255, 0.7);
        }

        .sys-section .section-divider {
            background: #5EEAD4;
        }

        .sys-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 40px;
        }

        .sys-card {
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-md);
            padding: 24px;
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: background .3s, transform .3s;
        }

        .sys-card:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-3px);
        }

        .sys-card .platform-icon {
            width: 44px;
            height: 44px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
        }

        .sys-card .platform-icon svg {
            width: 22px;
            height: 22px;
            color: #5EEAD4;
        }

        .sys-card h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 12px;
            color: #fff;
        }

        .sys-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .sys-card ul li {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.75);
            display: flex;
            justify-content: space-between;
        }

        .sys-card ul li .value {
            color: #5EEAD4;
            font-weight: 500;
        }

        /* ===== Testimonials ===== */
        .testi-section {
            background: var(--bg);
            padding: 88px 0;
        }

        .testi-grid {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 24px;
            margin-top: 40px;
        }

        .testi-card {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            padding: 28px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: box-shadow .3s, transform .3s;
            display: flex;
            flex-direction: column;
        }

        .testi-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }

        .testi-card.featured {
            border-color: rgba(15, 118, 110, 0.4);
            box-shadow: 0 8px 32px rgba(15, 118, 110, 0.12);
        }

        .testi-stars {
            display: flex;
            gap: 2px;
            margin-bottom: 14px;
        }

        .testi-stars svg {
            width: 16px;
            height: 16px;
            color: var(--accent);
        }

        .testi-card blockquote {
            font-size: 15px;
            color: var(--text);
            line-height: 1.8;
            margin: 0 0 20px;
            flex: 1;
            border-left: 3px solid var(--primary-light);
            padding-left: 12px;
        }

        .testi-user {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .testi-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-weight: 700;
            font-size: 14px;
        }

        .testi-user .name {
            font-size: 14px;
            font-weight: 600;
        }

        .testi-user .role {
            font-size: 12px;
            color: var(--text-secondary);
        }

        /* ===== Download Section ===== */
        .download-section {
            background: var(--card-bg);
            padding: 88px 0;
            text-align: center;
        }

        .download-section .section-divider {
            margin-left: auto;
            margin-right: auto;
        }

        .version-tabs {
            display: flex;
            justify-content: center;
            gap: 12px;
            flex-wrap: wrap;
            margin: 32px 0 28px;
        }

        .version-tab {
            background: var(--primary-light);
            color: var(--primary);
            border: none;
            padding: 8px 22px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 500;
            cursor: pointer;
            transition: all .3s;
        }

        .version-tab.active {
            background: var(--primary);
            color: #fff;
        }

        .version-tab:hover {
            background: rgba(15, 118, 110, 0.25);
        }

        .download-main-btn {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 24px;
        }

        .download-meta {
            display: flex;
            justify-content: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        .meta-badge {
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 500;
            padding: 6px 16px;
            border-radius: 999px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-variant-numeric: tabular-nums;
        }

        /* ===== News List ===== */
        .news-section {
            background: var(--bg);
            padding: 88px 0;
        }

        .news-header {
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            margin-bottom: 24px;
        }

        .news-list {
            border-radius: var(--radius-md);
            overflow: hidden;
        }

        .news-item {
            display: flex;
            align-items: center;
            background: var(--card-bg);
            padding: 20px 24px;
            border-bottom: 1px solid var(--border);
            transition: background .25s;
            text-decoration: none;
            color: var(--text);
            gap: 20px;
        }

        .news-item:last-child {
            border-bottom: none;
        }

        .news-item:hover {
            background: rgba(15, 118, 110, 0.03);
            text-decoration: none;
        }

        .news-thumb {
            width: 96px;
            height: 64px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--primary-light);
        }

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

        .news-content {
            flex: 1;
            min-width: 0;
        }

        .news-content h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 4px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            color: var(--text);
            transition: color .25s;
        }

        .news-item:hover .news-content h3 {
            color: var(--primary);
        }

        .news-content p {
            font-size: 14px;
            color: var(--text-secondary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            margin: 0;
        }

        .news-meta {
            display: flex;
            flex-direction: column;
            align-items: flex-end;
            gap: 6px;
            flex-shrink: 0;
        }

        .news-meta .tag {
            font-size: 12px;
            color: var(--primary);
            background: var(--primary-light);
            padding: 2px 10px;
            border-radius: 999px;
            font-weight: 500;
        }

        .news-meta .time {
            font-size: 13px;
            color: var(--text-secondary);
            font-variant-numeric: tabular-nums;
        }

        /* Empty State */
        .empty-state {
            background: var(--primary-light);
            border-radius: var(--radius-md);
            padding: 48px 24px;
            text-align: center;
        }

        .empty-state svg {
            width: 64px;
            height: 64px;
            color: var(--primary);
            opacity: 0.5;
            margin-bottom: 16px;
        }

        .empty-state p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 20px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--card-bg);
            padding: 88px 0;
        }

        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }

        .faq-item {
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 16px;
            overflow: hidden;
            transition: border-color .25s;
        }

        .faq-item:hover {
            border-color: rgba(15, 118, 110, 0.3);
        }

        .faq-question {
            background: var(--card-bg);
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            border: none;
            width: 100%;
            text-align: left;
            color: var(--text);
            transition: background .25s;
        }

        .faq-question:hover {
            background: rgba(15, 118, 110, 0.03);
        }

        .faq-question .icon {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            color: var(--primary);
            transition: transform .3s;
        }

        .faq-item.open .faq-question .icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            display: none;
        }

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

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary-light);
            padding: 64px 0;
            text-align: center;
        }

        .cta-section h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .cta-section p {
            color: var(--text-secondary);
            font-size: 16px;
            margin-bottom: 28px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

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

        .site-footer::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), transparent);
            opacity: 0.6;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 48px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-brand .brand-icon {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
        }

        .footer-brand .brand-text {
            color: #fff;
            font-size: 18px;
        }

        .footer-desc {
            font-size: 13px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 280px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }

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

        .footer-col ul li a {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            transition: color .25s;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 20px 0;
            text-align: center;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.5);
        }

        /* ===== Mobile Bottom Tab ===== */
        .bottom-tabbar {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: 56px;
            background: #fff;
            border-top: 1px solid var(--border);
            z-index: 1050;
            padding-bottom: env(safe-area-inset-bottom);
        }

        .tabbar-inner {
            display: flex;
            height: 56px;
        }

        .tab-item {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 2px;
            color: #9CA3AF;
            font-size: 11px;
            text-decoration: none;
            transition: color .25s;
        }

        .tab-item svg {
            width: 20px;
            height: 20px;
        }

        .tab-item.active {
            color: var(--primary);
        }

        .tab-item:hover {
            color: var(--primary);
        }

        .tab-download .tab-icon-wrap {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .tab-download .tab-icon-wrap svg {
            width: 16px;
            height: 16px;
            color: #fff;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1199.98px) {
            .features-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 991.98px) {
            .main-nav {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .header-cta {
                margin-left: 0;
            }

            .page-hero .hero-inner {
                grid-template-columns: 1fr;
                gap: 40px;
                padding-top: 24px;
            }

            .hero-content h1 {
                font-size: 36px;
            }

            .hero-visual {
                max-width: 560px;
            }

            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .metric-item {
                border-right: none;
                border-bottom: 1px solid var(--border);
                padding: 12px;
            }

            .metric-item:nth-child(3),
            .metric-item:nth-child(4) {
                border-bottom: none;
            }

            .sys-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .testi-grid {
                grid-template-columns: 1fr;
                max-width: 480px;
                margin-left: auto;
                margin-right: auto;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .bottom-tabbar {
                display: block;
            }

            body {
                padding-bottom: 56px;
            }

            .section {
                padding: 64px 0;
            }

            .features-section {
                padding: 64px 0;
            }

            .carousel-section {
                padding: 64px 0;
            }

            .sys-section {
                padding: 64px 0;
            }

            .testi-section {
                padding: 64px 0;
            }

            .download-section {
                padding: 64px 0;
            }

            .news-section {
                padding: 64px 0;
            }

            .faq-section {
                padding: 64px 0;
            }

            .cta-section {
                padding: 48px 0;
            }

            .site-footer {
                padding-top: 48px;
            }

            .page-hero {
                padding: 100px 0 48px;
            }
        }

        @media (max-width: 767.98px) {
            .section-title {
                font-size: 26px;
            }

            .hero-content h1 {
                font-size: 30px;
            }

            .hero-sub {
                font-size: 16px;
            }

            .features-grid {
                grid-template-columns: 1fr;
            }

            .feature-card.feature-lg {
                grid-row: auto;
            }

            .sys-grid {
                grid-template-columns: 1fr;
            }

            .news-item {
                flex-wrap: wrap;
                padding: 16px;
            }

            .news-thumb {
                width: 80px;
                height: 56px;
            }

            .news-meta {
                flex-direction: row;
                align-items: center;
                width: 100%;
                justify-content: space-between;
            }

            .download-main-btn {
                flex-direction: column;
                align-items: center;
            }

            .btn-lg {
                width: 100%;
                max-width: 320px;
            }

            .version-tabs {
                gap: 8px;
            }

            .version-tab {
                padding: 6px 16px;
                font-size: 13px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .header-cta .btn-header {
                display: none;
            }

            .brand-text {
                font-size: 16px;
            }

            .carousel-caption-custom {
                padding: 16px 12px 24px;
            }

            .carousel-caption-custom h3 {
                font-size: 16px;
            }

            .carousel-control-custom {
                width: 32px;
                height: 32px;
                font-size: 14px;
            }

            .news-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
        }

        @media (max-width: 519.98px) {
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .metrics-grid {
                grid-template-columns: 1fr;
            }

            .metric-item {
                border-bottom: 1px solid var(--border);
            }

            .metric-item:last-child {
                border-bottom: none;
            }

            .cta-actions {
                flex-direction: column;
                align-items: center;
            }

            .cta-actions .btn {
                width: 100%;
                max-width: 280px;
            }
        }

        @media (min-width: 992px) {
            .bottom-tabbar {
                display: none !important;
            }

            body {
                padding-bottom: 0;
            }
        }

/* roulang page: article */
:root {
            --primary: #0F766E;
            --primary-dark: #134E4A;
            --primary-light: #E9EFEC;
            --accent: #F59E0B;
            --accent-hover: #D97706;
            --accent-soft: #FEF3C7;
            --page-bg: #F8F7F4;
            --card-bg: #FFFFFF;
            --text-main: #1F2937;
            --text-secondary: #6B7280;
            --border-color: #E5E7EB;
            --success: #10B981;
            --white: #FFFFFF;
            --radius-small: 6px;
            --radius-card: 12px;
            --radius-panel: 16px;
            --radius-btn: 8px;
            --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 8px 24px rgba(15, 118, 110, 0.10);
            --shadow-nav: 0 4px 12px rgba(0, 0, 0, 0.06);
            --transition-base: all 0.25s ease;
            --font-family: system-ui, -apple-system, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--page-bg);
            color: var(--text-main);
            line-height: 1.75;
            font-size: 16px;
            padding-bottom: 56px;
            -webkit-font-smoothing: antialiased;
        }

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

        a:hover {
            color: var(--primary-dark);
        }

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

        button {
            font-family: var(--font-family);
            cursor: pointer;
        }

        input,
        textarea {
            font-family: var(--font-family);
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        @media (min-width: 992px) {
            body {
                padding-bottom: 0;
            }
        }

        /* ========== Header 导航 ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition-base);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-nav);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 20px;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            flex-shrink: 0;
        }

        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: var(--white);
            border-radius: 50%;
            font-weight: 800;
            font-size: 14px;
            letter-spacing: 0.02em;
        }

        .brand-text {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: 0.01em;
        }

        .main-nav {
            display: none;
            align-items: center;
            gap: 32px;
        }

        .main-nav .nav-link {
            font-size: 15px;
            color: #4B5563;
            font-weight: 500;
            padding: 6px 0;
            position: relative;
            text-decoration: none;
            transition: var(--transition-base);
        }

        .main-nav .nav-link::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: var(--primary);
            border-radius: 999px;
            transition: var(--transition-base);
        }

        .main-nav .nav-link:hover {
            color: var(--primary);
        }

        .main-nav .nav-link:hover::after {
            width: 100%;
        }

        .main-nav .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }

        .main-nav .nav-link.active::after {
            width: 100%;
        }

        .header-cta {
            display: none;
            flex-shrink: 0;
        }

        .btn-header {
            background: transparent;
            border: 1.5px solid var(--primary);
            color: var(--primary);
            font-weight: 600;
            font-size: 14px;
            padding: 8px 20px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
        }

        .btn-header:hover {
            background: rgba(15, 118, 110, 0.08);
            color: var(--primary-dark);
            transform: translateY(-1px);
        }

        .nav-toggle {
            display: flex;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-small);
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-main);
            border-radius: 2px;
            transition: var(--transition-base);
        }

        .nav-toggle:hover span {
            background: var(--primary);
        }

        @media (min-width: 992px) {
            .main-nav {
                display: flex;
            }
            .header-cta {
                display: block;
            }
            .nav-toggle {
                display: none;
            }
        }

        /* ========== 移动端底部 Tab ========== */
        .mobile-bottom-tabs {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: var(--white);
            border-top: 1px solid var(--border-color);
            display: flex;
            height: 56px;
            padding-bottom: env(safe-area-inset-bottom);
        }

        .mobile-bottom-tabs .tab-item {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 2px;
            color: #9CA3AF;
            font-size: 11px;
            text-decoration: none;
            transition: var(--transition-base);
        }

        .mobile-bottom-tabs .tab-item i {
            font-size: 20px;
            line-height: 1;
        }

        .mobile-bottom-tabs .tab-item.active {
            color: var(--primary);
        }

        .mobile-bottom-tabs .tab-item.active i {
            color: var(--primary);
        }

        .mobile-bottom-tabs .tab-item .tab-download {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 24px;
            background: rgba(245, 158, 11, 0.15);
            border-radius: 999px;
        }

        .mobile-bottom-tabs .tab-item .tab-download i {
            font-size: 15px;
            color: var(--accent);
        }

        @media (min-width: 992px) {
            .mobile-bottom-tabs {
                display: none;
            }
        }

        /* ========== 面包屑 ========== */
        .breadcrumb-bar {
            background: var(--primary-light);
            padding: 14px 0;
            border-bottom: 1px solid rgba(0, 0, 0, 0.03);
        }

        .breadcrumb-bar .breadcrumb {
            margin: 0;
            font-size: 13px;
            --bs-breadcrumb-divider: "/";
        }

        .breadcrumb-bar .breadcrumb a {
            color: var(--text-secondary);
            text-decoration: none;
        }

        .breadcrumb-bar .breadcrumb a:hover {
            color: var(--primary);
        }

        .breadcrumb-bar .breadcrumb .active {
            color: var(--primary);
            font-weight: 600;
        }

        /* ========== 文章主体 ========== */
        .article-section {
            padding: 56px 0;
        }

        .article-wrapper {
            max-width: 820px;
            margin: 0 auto;
        }

        .article-header {
            margin-bottom: 36px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 12px 20px;
            margin-top: 18px;
            font-size: 13px;
            color: var(--text-secondary);
        }

        .article-meta .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta .meta-item i {
            font-size: 15px;
            color: var(--primary);
        }

        .article-category {
            display: inline-flex;
            align-items: center;
            padding: 4px 14px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .article-title {
            font-size: 30px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-main);
            margin: 12px 0 8px;
        }

        @media (min-width: 768px) {
            .article-title {
                font-size: 40px;
                line-height: 1.25;
            }
        }

        .article-content {
            background: var(--card-bg);
            border-radius: var(--radius-panel);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-color);
            padding: 32px 28px;
            font-size: 16px;
            line-height: 1.85;
            color: var(--text-main);
            word-break: break-word;
        }

        @media (min-width: 768px) {
            .article-content {
                padding: 48px 52px;
            }
        }

        .article-content h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-main);
            margin: 36px 0 16px;
            position: relative;
            padding-bottom: 12px;
        }

        .article-content h2::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 4px;
            background: var(--primary);
            border-radius: 999px;
        }

        .article-content h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            margin: 28px 0 12px;
        }

        .article-content p {
            margin-bottom: 20px;
            color: #374151;
        }

        .article-content img {
            border-radius: 8px;
            border: 1px solid var(--border-color);
            margin: 24px 0;
            max-width: 100%;
            height: auto;
        }

        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 16px 20px;
            margin: 24px 0;
            border-radius: 0 var(--radius-card) var(--radius-card) 0;
            color: var(--text-secondary);
        }

        .article-content ul,
        .article-content ol {
            margin: 0 0 20px 20px;
            color: #374151;
        }

        .article-content li {
            margin-bottom: 8px;
        }

        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }

        .article-content a:hover {
            color: var(--primary-dark);
        }

        .article-tags {
            margin-top: 36px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
        }

        .article-tags .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .article-tags .tag-item {
            display: inline-block;
            padding: 4px 14px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            text-decoration: none;
            transition: var(--transition-base);
            border: 1px solid rgba(15, 118, 110, 0.15);
        }

        .article-tags .tag-item:hover {
            background: var(--primary);
            color: var(--white);
        }

        .article-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 36px;
            align-items: center;
            justify-content: space-between;
        }

        .btn-back-list {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--text-secondary);
            font-size: 14px;
            text-decoration: none;
        }

        .btn-back-list:hover {
            color: var(--primary);
        }

        .btn-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: var(--white);
            font-weight: 600;
            font-size: 14px;
            padding: 10px 24px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            text-decoration: none;
            border: none;
        }

        .btn-home:hover {
            background: var(--primary-dark);
            color: var(--white);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(15, 118, 110, 0.25);
        }

        /* 文章未找到 */
        .article-not-found {
            text-align: center;
            padding: 80px 24px;
            background: var(--card-bg);
            border-radius: var(--radius-panel);
            border: 1px solid var(--border-color);
        }

        .article-not-found .nf-icon {
            font-size: 56px;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .article-not-found h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
        }

        .article-not-found p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        .btn-notfound-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: var(--white);
            font-weight: 600;
            font-size: 15px;
            padding: 12px 30px;
            border-radius: var(--radius-btn);
            text-decoration: none;
            transition: var(--transition-base);
        }

        .btn-notfound-home:hover {
            background: var(--primary-dark);
            color: var(--white);
        }

        /* ========== 相关推荐 ========== */
        .related-section {
            padding: 48px 0 80px;
        }

        .related-title {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 28px;
            position: relative;
            display: inline-block;
            padding-bottom: 10px;
        }

        .related-title::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 4px;
            background: var(--primary);
            border-radius: 999px;
        }

        .related-card {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(15, 118, 110, 0.3);
        }

        .related-card .card-img-wrap {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--primary-light);
        }

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

        .related-card:hover .card-img-wrap img {
            transform: scale(1.04);
        }

        .related-card .card-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .related-card .card-tag {
            display: inline-block;
            align-self: flex-start;
            padding: 3px 10px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 10px;
        }

        .related-card .card-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.4;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .card-title a {
            color: inherit;
            text-decoration: none;
        }

        .related-card .card-title a:hover {
            color: var(--primary);
        }

        .related-card .card-excerpt {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .card-meta {
            margin-top: auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: var(--text-secondary);
        }

        .related-card .card-meta .time {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* ========== CTA 区 ========== */
        .article-cta {
            padding: 64px 0;
            background: var(--primary-dark);
            position: relative;
            overflow: hidden;
        }

        .article-cta::before {
            content: "";
            position: absolute;
            top: 0;
            right: 0;
            width: 40%;
            height: 100%;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.1;
        }

        .article-cta .cta-content {
            text-align: center;
            color: var(--white);
            position: relative;
            z-index: 1;
        }

        .article-cta .cta-content h2 {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 16px;
        }

        .article-cta .cta-content p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 15px;
            max-width: 600px;
            margin: 0 auto 28px;
        }

        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent);
            color: #1F2937;
            font-weight: 800;
            font-size: 16px;
            padding: 14px 40px;
            border-radius: var(--radius-btn);
            transition: var(--transition-base);
            text-decoration: none;
            border: none;
        }

        .btn-cta:hover {
            background: var(--accent-hover);
            color: #1F2937;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(245, 158, 11, 0.3);
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 64px 0 0;
            position: relative;
        }

        .site-footer::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent), transparent);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 40px;
            margin-bottom: 48px;
        }

        @media (min-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (min-width: 992px) {
            .footer-grid {
                grid-template-columns: 1.2fr 0.8fr 0.8fr 1fr;
                gap: 32px;
            }
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-brand .brand-icon {
            background: rgba(255, 255, 255, 0.15);
            color: var(--white);
        }

        .footer-brand .brand-text {
            color: var(--white);
            font-size: 18px;
        }

        .footer-desc {
            font-size: 13px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.65);
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 8px;
        }

        .footer-col h4::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 24px;
            height: 2px;
            background: var(--accent);
            border-radius: 999px;
        }

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

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

        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 13px;
            text-decoration: none;
            transition: var(--transition-base);
        }

        .footer-col ul li a:hover {
            color: var(--white);
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding: 20px 0;
            text-align: center;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.45);
        }

        /* ========== FAQ ========== */
        .faq-section {
            padding: 56px 0;
        }

        .faq-title {
            font-size: 26px;
            font-weight: 800;
            color: var(--text-main);
            text-align: center;
            margin-bottom: 40px;
            position: relative;
        }

        .faq-title::after {
            content: "";
            position: absolute;
            bottom: -12px;
            left: 50%;
            transform: translateX(-50%);
            width: 40px;
            height: 4px;
            background: var(--primary);
            border-radius: 999px;
        }

        .faq-item {
            background: var(--card-bg);
            border-radius: var(--radius-card);
            padding: 20px 24px;
            margin-bottom: 14px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
        }

        .faq-item .question {
            font-weight: 600;
            font-size: 16px;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .faq-item .question::before {
            content: "Q";
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 24px;
            height: 24px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 6px;
            font-size: 12px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .faq-item .answer {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 12px;
            padding-left: 34px;
            line-height: 1.8;
        }

/* roulang page: category1 */
:root {
            --primary: #0F766E;
            --primary-dark: #134E4A;
            --primary-light: #E9EFEC;
            --accent: #F59E0B;
            --accent-dark: #D97706;
            --bg: #F8F7F4;
            --card-bg: #FFFFFF;
            --text: #1F2937;
            --text-secondary: #6B7280;
            --border: #E5E7EB;
            --success: #10B981;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 24px rgba(15, 118, 110, 0.10);
            --font-family: system-ui, -apple-system, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.75;
            font-size: 16px;
            padding-bottom: 56px;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }

        a:hover {
            color: var(--primary-dark);
        }

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

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section {
            padding: 88px 0;
        }

        .section-title {
            font-size: 36px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 12px;
            position: relative;
        }

        .section-title::after {
            content: "";
            display: block;
            width: 40px;
            height: 4px;
            background: var(--primary);
            border-radius: 2px;
            margin-top: 12px;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 48px;
            max-width: 640px;
        }

        .btn {
            border-radius: 8px;
            font-weight: 600;
            padding: 12px 28px;
            transition: all 0.2s ease;
            border: 1.5px solid transparent;
        }

        .btn-lg {
            padding: 14px 36px;
            font-size: 16px;
        }

        .btn-accent {
            background: var(--accent);
            color: var(--text);
            border-color: var(--accent);
            font-weight: 700;
        }

        .btn-accent:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(245, 158, 11, 0.25);
        }

        .btn-accent:active {
            transform: translateY(0);
            box-shadow: none;
        }

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

        .btn-outline-primary:hover {
            background: rgba(15, 118, 110, 0.08);
            color: var(--primary-dark);
            border-color: var(--primary);
        }

        .btn-primary {
            background: var(--primary) !important;
            border-color: var(--primary) !important;
            color: #fff !important;
        }

        .btn-primary:hover {
            background: var(--primary-dark) !important;
            border-color: var(--primary-dark) !important;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(15, 118, 110, 0.2);
        }

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: 68px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border);
            transition: box-shadow 0.3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }

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

        .brand-icon {
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: #fff;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 16px;
            letter-spacing: 0.5px;
        }

        .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            white-space: nowrap;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-link {
            font-size: 15px;
            color: var(--text-secondary);
            position: relative;
            padding: 6px 0;
            white-space: nowrap;
            transition: color 0.2s;
        }

        .nav-link:hover {
            color: var(--primary);
        }

        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }

        .nav-link.active::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }

        .header-cta {
            flex-shrink: 0;
        }

        .btn-header {
            background: var(--primary);
            color: #fff;
            padding: 8px 20px;
            font-size: 14px;
            font-weight: 600;
            border-radius: 8px;
        }

        .btn-header:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-1px);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            padding: 8px;
            cursor: pointer;
        }

        .nav-toggle span {
            width: 24px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: all 0.3s;
        }

        /* Page Hero */
        .page-hero {
            padding: 140px 0 64px;
            position: relative;
            background: linear-gradient(135deg, var(--bg) 0%, #f1f5f2 100%);
        }

        .page-hero::before {
            content: "";
            position: absolute;
            top: 0;
            right: 0;
            width: 50%;
            height: 100%;
            background: var(--primary-light);
            border-radius: 0 0 0 40px;
            z-index: 0;
        }

        .page-hero .container {
            position: relative;
            z-index: 1;
        }

        .breadcrumb-wrap {
            margin-bottom: 32px;
        }

        .breadcrumb {
            background: transparent;
            padding: 0;
            margin: 0;
            font-size: 13px;
        }

        .breadcrumb a {
            color: var(--text-secondary);
        }

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

        .breadcrumb-item.active {
            color: var(--primary);
            font-weight: 600;
        }

        .breadcrumb-item+.breadcrumb-item::before {
            content: "/";
            color: var(--text-secondary);
            padding: 0 8px;
        }

        .hero-row {
            align-items: center;
        }

        .hero-text {
            padding-right: 48px;
        }

        .hero-text h1 {
            font-size: 48px;
            font-weight: 800;
            line-height: 1.2;
            color: var(--text);
            margin-bottom: 20px;
        }

        .hero-text h1 span {
            color: var(--accent);
        }

        .hero-subtitle {
            font-size: 17px;
            color: var(--text-secondary);
            margin-bottom: 32px;
            max-width: 460px;
            line-height: 1.7;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 24px;
        }

        .hero-meta {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .meta-badge {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 4px 14px;
            font-size: 12px;
            color: var(--text-secondary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-variant-numeric: tabular-nums;
        }

        .meta-badge svg {
            width: 14px;
            height: 14px;
        }

        .hero-visual {
            position: relative;
        }

        .hero-panel {
            background: var(--card-bg);
            border-radius: 16px;
            box-shadow: var(--shadow-md);
            overflow: hidden;
            position: relative;
            aspect-ratio: 4 / 3;
        }

        .hero-panel img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .official-badge {
            position: absolute;
            top: 16px;
            left: 16px;
            background: var(--primary);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 999px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            box-shadow: 0 4px 12px rgba(15, 118, 110, 0.3);
        }

        .official-badge svg {
            width: 14px;
            height: 14px;
        }

        /* Trust Bar */
        .trust-bar {
            background: var(--card-bg);
            border-bottom: 1px solid var(--border);
            padding: 24px 0;
        }

        .trust-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 0;
        }

        .trust-item {
            text-align: center;
            padding: 12px 16px;
            position: relative;
        }

        .trust-item+.trust-item::before {
            content: "";
            position: absolute;
            left: 0;
            top: 20%;
            height: 60%;
            width: 1px;
            background: var(--border);
        }

        .trust-num {
            display: block;
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
            font-variant-numeric: tabular-nums;
        }

        .trust-label {
            display: block;
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        /* Platform Cards */
        .platform-section {
            background: var(--bg);
        }

        .platform-grid {
            row-gap: 24px;
        }

        .platform-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            height: 100%;
            transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
            display: flex;
            flex-direction: column;
        }

        .platform-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-sm);
            border-color: rgba(15, 118, 110, 0.3);
        }

        .platform-icon {
            width: 44px;
            height: 44px;
            background: var(--primary-light);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
        }

        .platform-icon svg {
            width: 22px;
            height: 22px;
            stroke: var(--primary);
        }

        .platform-card h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .platform-card ul {
            list-style: none;
            padding: 0;
            margin: 0 0 24px;
            flex: 1;
        }

        .platform-card ul li {
            font-size: 14px;
            color: var(--text-secondary);
            padding: 6px 0;
            border-bottom: 1px solid #f3f4f6;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .platform-card ul li:last-child {
            border-bottom: none;
        }

        .platform-card ul li::before {
            content: "";
            width: 5px;
            height: 5px;
            background: var(--primary);
            border-radius: 50%;
            flex-shrink: 0;
        }

        .platform-card .btn {
            width: 100%;
        }

        .platform-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 999px;
            margin-bottom: 12px;
        }

        /* Reasons */
        .reasons-section {
            background: var(--primary-dark);
            color: #fff;
            position: relative;
            overflow: hidden;
        }

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

        .reasons-section .section-title::after {
            background: var(--accent);
        }

        .reasons-section .section-subtitle {
            color: rgba(255, 255, 255, 0.75);
        }

        .reason-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .reason-card {
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            transition: background 0.2s ease;
        }

        .reason-card:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        .reason-icon {
            width: 44px;
            height: 44px;
            background: rgba(255, 255, 255, 0.12);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
        }

        .reason-icon svg {
            width: 22px;
            height: 22px;
            stroke: #5EEAD4;
        }

        .reason-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
            color: #fff;
        }

        .reason-card p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.6;
        }

        /* Steps */
        .steps-section {
            background: var(--bg);
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            position: relative;
        }

        .steps-grid::before {
            content: "";
            position: absolute;
            top: 40px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: var(--primary-light);
            z-index: 0;
        }

        .step-item {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 24px;
        }

        .step-num {
            width: 56px;
            height: 56px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            margin: 0 auto 20px;
            box-shadow: 0 4px 12px rgba(15, 118, 110, 0.2);
        }

        .step-item h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .step-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* System Requirements */
        .sysreq-section {
            background: var(--primary-dark);
            color: #fff;
        }

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

        .sysreq-section .section-subtitle {
            color: rgba(255, 255, 255, 0.7);
        }

        .sysreq-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .sysreq-card {
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-md);
            padding: 32px 24px;
        }

        .sysreq-platform {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 20px;
        }

        .sysreq-platform svg {
            width: 28px;
            height: 28px;
            stroke: #5EEAD4;
        }

        .sysreq-platform span {
            font-size: 18px;
            font-weight: 600;
            color: #fff;
        }

        .sysreq-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .sysreq-list li {
            display: flex;
            justify-content: space-between;
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 13px;
        }

        .sysreq-list li:last-child {
            border-bottom: none;
        }

        .sysreq-label {
            color: rgba(255, 255, 255, 0.6);
        }

        .sysreq-value {
            color: #5EEAD4;
            font-weight: 600;
            font-variant-numeric: tabular-nums;
        }

        /* FAQ */
        .faq-section {
            background: var(--bg);
        }

        .faq-list {
            max-width: 760px;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color 0.2s;
        }

        .faq-item.open {
            border-color: rgba(15, 118, 110, 0.3);
        }

        .faq-question {
            width: 100%;
            background: transparent;
            border: none;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }

        .faq-question svg {
            width: 18px;
            height: 18px;
            stroke: var(--primary);
            flex-shrink: 0;
            transition: transform 0.3s ease;
        }

        .faq-item.open .faq-question svg {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* CTA */
        .cta-section {
            padding: 80px 0;
            background: var(--card-bg);
            border-top: 1px solid var(--border);
        }

        .cta-inner {
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
        }

        .cta-inner h2 {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .cta-inner p {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 32px;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 24px;
        }

        .cta-badges {
            display: flex;
            justify-content: center;
            gap: 10px;
            flex-wrap: wrap;
        }

        .cta-badges .meta-badge {
            background: var(--primary-light);
            color: var(--primary);
            border: none;
        }

        /* Footer */
        .site-footer {
            background: var(--primary-dark);
            color: #fff;
            padding: 64px 0 32px;
            position: relative;
        }

        .site-footer::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), transparent);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr 1.2fr;
            gap: 48px;
            margin-bottom: 48px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-brand .brand-icon {
            background: rgba(255, 255, 255, 0.15);
        }

        .footer-brand .brand-text {
            color: #fff;
            font-size: 18px;
            font-weight: 700;
        }

        .footer-desc {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            max-width: 260px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }

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

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

        .footer-col ul li a {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            transition: color 0.2s;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            text-align: center;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.5);
        }

        /* Bottom Tab */
        .bottom-tab {
            display: none;
        }

        /* Responsive */
        @media (min-width: 992px) {
            .bottom-tab {
                display: none !important;
            }

            body {
                padding-bottom: 0;
            }
        }

        @media (max-width: 991.98px) {
            .main-nav {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 16px 24px;
                border-bottom: 1px solid var(--border);
                gap: 8px;
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
            }

            .main-nav.open {
                display: flex;
            }

            .nav-toggle {
                display: flex;
            }

            .header-cta {
                display: none;
            }

            .section {
                padding: 64px 0;
            }

            .section-title {
                font-size: 28px;
            }

            .page-hero {
                padding: 120px 0 48px;
            }

            .hero-row {
                flex-direction: column;
                gap: 40px;
            }

            .hero-text {
                padding-right: 0;
            }

            .hero-text h1 {
                font-size: 36px;
            }

            .hero-visual {
                width: 100%;
            }

            .trust-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .trust-item+.trust-item::before {
                display: none;
            }

            .trust-item:nth-child(odd) {
                border-right: 1px solid var(--border);
            }

            .trust-item:nth-child(3)::before {
                content: "";
                position: absolute;
                right: 0;
                top: 20%;
                height: 60%;
                width: 1px;
                background: var(--border);
            }

            .reason-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .steps-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .steps-grid::before {
                display: none;
            }

            .sysreq-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .bottom-tab {
                display: flex;
            }
        }

        @media (max-width: 767.98px) {
            .section {
                padding: 48px 0;
            }

            .section-title {
                font-size: 24px;
            }

            .section-subtitle {
                font-size: 14px;
                margin-bottom: 32px;
            }

            .page-hero {
                padding: 100px 0 40px;
            }

            .hero-text h1 {
                font-size: 30px;
            }

            .hero-subtitle {
                font-size: 15px;
            }

            .hero-actions {
                flex-direction: column;
                gap: 12px;
            }

            .hero-actions .btn {
                width: 100%;
                text-align: center;
            }

            .trust-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .trust-num {
                font-size: 18px;
            }

            .trust-label {
                font-size: 12px;
            }

            .platform-grid {
                grid-template-columns: 1fr;
            }

            .platform-card {
                padding: 24px;
            }

            .reason-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .reason-card {
                padding: 24px;
            }

            .steps-grid {
                gap: 24px;
            }

            .sysreq-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .sysreq-card {
                padding: 24px;
            }

            .cta-inner h2 {
                font-size: 28px;
            }

            .cta-actions {
                flex-direction: column;
                gap: 12px;
            }

            .cta-actions .btn {
                width: 100%;
                text-align: center;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .footer-desc {
                max-width: 100%;
            }

            /* Bottom Tab */
            .bottom-tab {
                position: fixed;
                bottom: 0;
                left: 0;
                right: 0;
                height: 56px;
                background: #fff;
                border-top: 1px solid var(--border);
                display: flex;
                align-items: center;
                justify-content: space-around;
                z-index: 1000;
                padding-bottom: env(safe-area-inset-bottom);
            }

            .tab-item {
                display: flex;
                flex-direction: column;
                align-items: center;
                gap: 2px;
                font-size: 11px;
                color: #9CA3AF;
                padding: 4px 8px;
                transition: color 0.2s;
            }

            .tab-item:hover {
                color: var(--primary);
            }

            .tab-item.active {
                color: var(--primary);
            }

            .tab-item svg {
                width: 20px;
                height: 20px;
                stroke: currentColor;
            }

            .tab-item.tab-cta svg {
                background: var(--primary);
                color: #fff;
                border-radius: 50%;
                padding: 4px;
            }

            .tab-item.tab-cta.active svg {
                background: var(--primary-dark);
            }

            .faq-question {
                font-size: 15px;
                padding: 16px 20px;
            }

            .faq-answer-inner {
                padding: 0 20px 16px;
                font-size: 14px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #0F766E;
            --primary-dark: #134E4A;
            --primary-light: #E9EFEC;
            --accent: #F59E0B;
            --accent-hover: #D97706;
            --bg: #F8F7F4;
            --card-bg: #FFFFFF;
            --text: #1F2937;
            --text-muted: #6B7280;
            --border: #E5E7EB;
            --success: #10B981;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 24px rgba(15, 118, 110, 0.10);
            --shadow-lg: 0 12px 32px rgba(15, 118, 110, 0.16);
            --space-xs: 8px;
            --space-sm: 16px;
            --space-md: 24px;
            --space-lg: 48px;
            --space-xl: 88px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
            background: var(--bg);
            color: var(--text);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            padding-bottom: 60px;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s ease;
        }

        a:hover {
            color: var(--primary-dark);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section-head {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-head .section-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 4px 16px;
            border-radius: 999px;
            margin-bottom: 12px;
            letter-spacing: .5px;
        }

        .section-head h2 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 12px;
            color: var(--text);
        }

        .section-head h2::after {
            content: "";
            display: block;
            width: 40px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 14px auto 0;
        }

        .section-head p {
            color: var(--text-muted);
            font-size: 16px;
            max-width: 560px;
            margin: 16px auto 0;
        }

        section {
            padding-top: var(--space-xl);
            padding-bottom: var(--space-xl);
        }

        /* ========== Buttons ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 15px;
            line-height: 1.4;
            border: none;
            transition: all .25s ease;
            cursor: pointer;
            text-decoration: none;
        }

        .btn svg {
            width: 18px;
            height: 18px;
            stroke-width: 2;
        }

        .btn-accent {
            background: var(--accent);
            color: #1F2937;
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.28);
        }

        .btn-accent:hover {
            background: var(--accent-hover);
            color: #1F2937;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(245, 158, 11, 0.35);
        }

        .btn-accent:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(245, 158, 11, 0.25);
        }

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

        .btn-outline:hover {
            background: rgba(15, 118, 110, 0.08);
            color: var(--primary-dark);
            border-color: var(--primary-dark);
        }

        .btn-light-outline {
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.6);
        }

        .btn-light-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            border-color: #fff;
        }

        .btn-lg {
            padding: 18px 44px;
            font-size: 17px;
            border-radius: 10px;
        }

        .btn-header {
            padding: 9px 20px;
            font-size: 14px;
            font-weight: 600;
            background: none;
            border: 1.5px solid var(--primary);
            color: var(--primary);
            border-radius: 8px;
        }

        .btn-header:hover {
            background: rgba(15, 118, 110, 0.08);
            transform: none;
            box-shadow: none;
        }

        /* ========== Header ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border);
            transition: box-shadow .3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 24px;
        }

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

        .brand-icon {
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: 800;
            letter-spacing: .5px;
        }

        .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            white-space: nowrap;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
            margin-left: auto;
        }

        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-muted);
            text-decoration: none;
            padding: 8px 0;
            border-bottom: 3px solid transparent;
            transition: all .2s ease;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--primary);
        }

        .nav-link.active {
            color: var(--primary);
            border-bottom-color: var(--primary);
            font-weight: 600;
        }

        .header-cta {
            flex-shrink: 0;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }

        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: all .3s;
        }

        /* ========== Mobile Tabbar ========== */
        .mobile-tabbar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: #fff;
            border-top: 1px solid var(--border);
            display: none;
            z-index: 1060;
            padding-bottom: env(safe-area-inset-bottom);
        }

        .tabbar-inner {
            display: flex;
            align-items: center;
            justify-content: space-around;
            height: 100%;
        }

        .tab-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 3px;
            color: #9CA3AF;
            font-size: 11px;
            text-decoration: none;
            flex: 1;
            height: 100%;
            transition: color .2s;
        }

        .tab-item svg {
            width: 20px;
            height: 20px;
        }

        .tab-item.active {
            color: var(--primary);
        }

        .tab-item .tab-download {
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            margin-top: -8px;
        }

        .tab-item .tab-download svg {
            width: 16px;
            height: 16px;
        }

        /* ========== Page Hero ========== */
        .page-hero {
            position: relative;
            padding-top: 80px;
            padding-bottom: 88px;
            background: var(--bg);
            overflow: hidden;
        }

        .page-hero::before {
            content: "";
            position: absolute;
            top: 0;
            right: 0;
            width: 48%;
            height: 100%;
            background: var(--primary-light);
            border-radius: 0 0 0 60px;
            z-index: 0;
        }

        .page-hero::after {
            content: "";
            position: absolute;
            top: 24px;
            right: 6%;
            width: 180px;
            height: 180px;
            background-image: radial-gradient(rgba(15, 118, 110, 0.16) 1.5px, transparent 1.5px);
            background-size: 16px 16px;
            border-radius: 24px;
            z-index: 0;
        }

        .page-hero .container {
            position: relative;
            z-index: 2;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 999px;
            margin-bottom: 16px;
        }

        .hero-badge svg {
            width: 14px;
            height: 14px;
        }

        .page-hero h1 {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 18px;
            color: var(--text);
        }

        .page-hero h1 .highlight {
            color: var(--accent);
        }

        .page-hero .lead {
            font-size: 17px;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 540px;
            margin-bottom: 28px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 24px;
        }

        .version-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 13px;
            color: var(--text-muted);
            font-variant-numeric: tabular-nums;
        }

        .version-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .version-meta span::before {
            content: "";
            width: 6px;
            height: 6px;
            background: var(--success);
            border-radius: 50%;
            display: inline-block;
        }

        .hero-visual {
            position: relative;
            padding-top: 40px;
        }

        .hero-visual .visual-frame {
            background: var(--primary-light);
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--shadow-md);
            aspect-ratio: 4 / 3;
        }

        .hero-visual .visual-frame img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 16px;
        }

        .official-badge {
            position: absolute;
            top: 20px;
            left: 20px;
            background: var(--primary);
            color: #fff;
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            box-shadow: 0 4px 16px rgba(15, 118, 110, 0.3);
        }

        .official-badge svg {
            width: 14px;
            height: 14px;
        }

        /* ========== Timeline ========== */
        .timeline-section {
            background: #fff;
        }

        .timeline-list {
            position: relative;
        }

        .timeline-list::before {
            content: "";
            position: absolute;
            top: 0;
            bottom: 0;
            left: 28px;
            width: 2px;
            background: var(--primary-light);
            border-radius: 2px;
        }

        .timeline-item {
            position: relative;
            padding-left: 80px;
            margin-bottom: 32px;
        }

        .timeline-item:last-child {
            margin-bottom: 0;
        }

        .timeline-dot {
            position: absolute;
            left: 21px;
            top: 28px;
            width: 16px;
            height: 16px;
            background: var(--primary);
            border-radius: 50%;
            border: 4px solid #fff;
            box-shadow: 0 0 0 2px var(--primary);
        }

        .timeline-dot.current {
            background: var(--accent);
            box-shadow: 0 0 0 2px var(--accent);
        }

        .timeline-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            transition: box-shadow .3s ease, transform .3s ease;
        }

        .timeline-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .timeline-card .row {
            align-items: center;
        }

        .timeline-card img {
            width: 100%;
            height: 100%;
            min-height: 140px;
            object-fit: cover;
            border-radius: 8px;
        }

        .timeline-header {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 12px;
        }

        .timeline-header h3 {
            font-size: 22px;
            font-weight: 700;
            margin: 0;
            color: var(--text);
        }

        .version-date {
            font-size: 13px;
            color: var(--text-muted);
            background: var(--primary-light);
            padding: 3px 12px;
            border-radius: 999px;
            font-variant-numeric: tabular-nums;
        }

        .badge-current {
            background: var(--accent);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 3px 12px;
            border-radius: 999px;
        }

        .timeline-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .timeline-card ul li {
            padding: 5px 0;
            padding-left: 20px;
            position: relative;
            font-size: 15px;
            color: var(--text);
            line-height: 1.6;
        }

        .timeline-card ul li::before {
            content: "";
            position: absolute;
            left: 0;
            top: 13px;
            width: 8px;
            height: 8px;
            background: var(--primary);
            border-radius: 50%;
            opacity: 0.7;
        }

        .version-tag {
            display: inline-block;
            font-size: 12px;
            color: var(--primary);
            background: var(--primary-light);
            padding: 2px 10px;
            border-radius: 999px;
            margin-top: 8px;
        }

        /* ========== Highlights ========== */
        .highlights-section {
            background: var(--bg);
        }

        .highlight-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 32px;
            height: 100%;
            box-shadow: var(--shadow-sm);
            transition: box-shadow .3s, transform .3s;
        }

        .highlight-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .highlight-main {
            background: var(--primary-dark);
            color: #fff;
            border-color: transparent;
            display: flex;
            flex-direction: column;
            justify-content: center;
            min-height: 300px;
        }

        .highlight-main:hover {
            box-shadow: var(--shadow-lg);
        }

        .highlight-icon {
            width: 48px;
            height: 48px;
            background: rgba(255, 255, 255, 0.12);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
        }

        .highlight-icon svg {
            width: 24px;
            height: 24px;
            stroke: #fff;
        }

        .highlight-main .highlight-icon {
            background: rgba(245, 158, 11, 0.2);
        }

        .highlight-main .highlight-icon svg {
            stroke: var(--accent);
        }

        .highlight-main h3 {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .highlight-main p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 15px;
            line-height: 1.7;
        }

        .highlight-main .metric {
            font-size: 36px;
            font-weight: 800;
            color: var(--accent);
            margin-top: 18px;
            font-variant-numeric: tabular-nums;
            line-height: 1;
        }

        .highlight-main .metric-label {
            color: rgba(255, 255, 255, 0.7);
            font-size: 13px;
            margin-top: 6px;
        }

        .highlight-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text);
        }

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

        .highlight-card.small {
            display: flex;
            flex-direction: column;
        }

        .highlight-card .mini-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 12px;
        }

        .highlight-card .mini-icon svg {
            width: 18px;
            height: 18px;
            stroke: var(--primary);
        }

        /* ========== Process ========== */
        .process-section {
            background: #fff;
        }

        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .process-step {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            position: relative;
            transition: box-shadow .3s, transform .3s;
        }

        .process-step:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .step-num {
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
            margin-bottom: 16px;
        }

        .process-step h3 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .process-step p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
        }

        /* ========== Requirements ========== */
        .requirements-section {
            background: var(--primary-dark);
            color: #fff;
        }

        .requirements-section .section-head h2 {
            color: #fff;
        }

        .requirements-section .section-head h2::after {
            background: var(--accent);
        }

        .requirements-section .section-head p {
            color: rgba(255, 255, 255, 0.7);
        }

        .req-card {
            background: rgba(255, 255, 255, 0.07);
            border-radius: var(--radius-md);
            padding: 28px;
            height: 100%;
            transition: background .3s;
        }

        .req-card:hover {
            background: rgba(255, 255, 255, 0.12);
        }

        .req-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
        }

        .req-icon svg {
            width: 22px;
            height: 22px;
            stroke: #5EEAD4;
        }

        .req-card h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 14px;
            color: #fff;
        }

        .req-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .req-list li {
            display: flex;
            justify-content: space-between;
            padding: 6px 0;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.8);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            gap: 12px;
        }

        .req-list li:last-child {
            border-bottom: none;
        }

        .req-list li .req-value {
            color: #5EEAD4;
            white-space: nowrap;
            font-variant-numeric: tabular-nums;
        }

        /* ========== FAQ ========== */
        .faq-section {
            background: var(--bg);
        }

        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: box-shadow .3s;
        }

        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }

        .faq-item h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 10px;
            display: flex;
            align-items: flex-start;
            gap: 8px;
        }

        .faq-item h3::before {
            content: "Q";
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 6px;
            width: 24px;
            height: 24px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 800;
            flex-shrink: 0;
            margin-top: 2px;
        }

        .faq-item p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            margin: 0;
            padding-left: 32px;
        }

        /* ========== CTA ========== */
        .cta-download {
            background: #fff;
            text-align: center;
            padding-top: 88px;
            padding-bottom: 88px;
        }

        .cta-download h2 {
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 12px;
        }

        .cta-download p {
            color: var(--text-muted);
            font-size: 16px;
            max-width: 480px;
            margin: 0 auto 28px;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 14px;
            margin-bottom: 24px;
        }

        .cta-meta {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
        }

        .cta-meta .badge-item {
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            padding: 5px 16px;
            border-radius: 999px;
            font-variant-numeric: tabular-nums;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.8);
            padding-top: 64px;
            position: relative;
        }

        .site-footer::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), var(--primary), transparent);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 48px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 14px;
        }

        .footer-brand .brand-icon {
            background: var(--accent);
            color: #1F2937;
        }

        .footer-brand .brand-text {
            color: #fff;
            font-size: 18px;
            font-weight: 700;
        }

        .footer-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            margin-bottom: 0;
            max-width: 280px;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 16px;
        }

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

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

        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            text-decoration: none;
            transition: color .2s;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            padding-bottom: 24px;
            text-align: center;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.4);
        }

        /* ========== Responsive ========== */
        @media (max-width: 991.98px) {
            .main-nav {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: flex-start;
                padding: 20px 24px;
                gap: 16px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-md);
            }

            .main-nav.open {
                display: flex;
            }

            .nav-toggle {
                display: flex;
            }

            .mobile-tabbar {
                display: block;
            }

            .page-hero {
                padding-top: 48px;
                padding-bottom: 56px;
            }

            .page-hero::before {
                width: 60%;
                border-radius: 0 0 0 40px;
            }

            .page-hero h1 {
                font-size: 36px;
            }

            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }

            .highlights-section .row>[class^="col-"] {
                margin-bottom: 24px;
            }

            .hero-visual {
                margin-top: 32px;
            }
        }

        @media (max-width: 767.98px) {
            body {
                padding-bottom: 56px;
            }

            section {
                padding-top: 56px;
                padding-bottom: 56px;
            }

            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .page-hero {
                padding-top: 36px;
                padding-bottom: 48px;
            }

            .page-hero::before {
                display: none;
            }

            .page-hero h1 {
                font-size: 30px;
                line-height: 1.25;
            }

            .page-hero .lead {
                font-size: 15px;
            }

            .hero-actions .btn {
                width: 100%;
            }

            .hero-visual {
                padding-top: 24px;
            }

            .section-head h2 {
                font-size: 26px;
            }

            .timeline-list::before {
                left: 16px;
            }

            .timeline-item {
                padding-left: 52px;
            }

            .timeline-dot {
                left: 10px;
                width: 14px;
                height: 14px;
            }

            .timeline-card {
                padding: 18px;
            }

            .timeline-card .row {
                row-gap: 16px;
            }

            .highlight-main {
                min-height: 240px;
            }

            .process-grid {
                grid-template-columns: 1fr;
            }

            .faq-grid {
                grid-template-columns: 1fr;
            }

            .cta-actions .btn {
                width: 100%;
                margin-bottom: 8px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .brand-text {
                font-size: 16px;
            }

            .header-cta {
                display: none;
            }
        }

        @media (min-width: 992px) {
            .mobile-tabbar {
                display: none !important;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #0F766E;
            --primary-dark: #134E4A;
            --accent: #F59E0B;
            --accent-dark: #D97706;
            --bg: #F8F7F4;
            --card-bg: #FFFFFF;
            --panel: #E9EFEC;
            --text: #1F2937;
            --text-muted: #6B7280;
            --border: #E5E7EB;
            --success: #10B981;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 8px 24px rgba(15, 118, 110, 0.10);
            --font-main: system-ui, -apple-system, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-main);
            background: var(--bg);
            color: var(--text);
            line-height: 1.75;
            font-size: 16px;
            padding-bottom: 56px;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }

        a:hover {
            color: var(--primary-dark);
        }

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

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

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section {
            padding: 88px 0;
        }

        .section-header {
            margin-bottom: 40px;
            max-width: 680px;
        }

        .section-header .eyebrow {
            font-size: 13px;
            color: var(--primary);
            font-weight: 700;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            display: block;
        }

        .section-header h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--text);
            line-height: 1.3;
            margin-top: 8px;
        }

        .section-header h2::after {
            content: '';
            display: block;
            width: 40px;
            height: 4px;
            background: var(--primary);
            border-radius: 2px;
            margin-top: 14px;
        }

        .section-header p {
            color: var(--text-muted);
            margin-top: 12px;
            font-size: 15px;
            line-height: 1.7;
        }

        .section-header.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .section-header.center h2::after {
            margin-left: auto;
            margin-right: auto;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 700;
            border: 2px solid transparent;
            cursor: pointer;
            transition: all 0.2s ease;
            line-height: 1.2;
        }

        .btn-primary {
            background: var(--accent);
            color: #1F2937;
            border-color: var(--accent);
        }

        .btn-primary:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            color: #1F2937;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(245, 158, 11, 0.25);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 4px 12px rgba(245, 158, 11, 0.2);
        }

        .btn-outline {
            background: transparent;
            border-color: var(--primary);
            color: var(--primary);
        }

        .btn-outline:hover {
            background: rgba(15, 118, 110, 0.08);
            transform: translateY(-2px);
        }

        .btn-outline:active {
            transform: translateY(0);
        }

        .btn-lg {
            padding: 16px 40px;
            font-size: 16px;
        }

        .btn svg {
            width: 20px;
            height: 20px;
        }

        .badge {
            display: inline-block;
            padding: 5px 16px;
            background: var(--panel);
            border-radius: 999px;
            font-size: 13px;
            color: var(--primary);
            font-weight: 500;
            line-height: 1.4;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border);
            height: 68px;
            transition: box-shadow 0.3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }

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

        .brand-icon {
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 14px;
            letter-spacing: -0.02em;
        }

        .brand-text {
            font-size: 18px;
            font-weight: 800;
            color: var(--text);
            white-space: nowrap;
        }

        .main-nav {
            display: flex;
            gap: 32px;
            align-items: center;
        }

        .nav-link {
            font-size: 15px;
            color: var(--text-muted);
            font-weight: 500;
            position: relative;
            padding: 22px 0 20px;
            transition: color 0.2s ease;
        }

        .nav-link:hover {
            color: var(--primary);
        }

        .nav-link.active {
            color: var(--primary);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--primary);
            border-radius: 3px 3px 0 0;
        }

        .header-cta .btn-header {
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 8px 22px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all 0.2s ease;
        }

        .header-cta .btn-header:hover {
            background: var(--primary-dark);
            color: #fff;
            box-shadow: 0 4px 12px rgba(15, 118, 110, 0.2);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            width: 40px;
            height: 40px;
            cursor: pointer;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            padding: 8px;
        }

        .nav-toggle span {
            display: block;
            height: 2px;
            width: 100%;
            background: var(--text);
            border-radius: 2px;
        }

        .mobile-tabbar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: 56px;
            background: #fff;
            border-top: 1px solid var(--border);
            display: none;
            z-index: 1000;
            padding-bottom: env(safe-area-inset-bottom);
        }

        .tabbar-inner {
            display: flex;
            height: 100%;
        }

        .tabbar-link {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 2px;
            color: #9CA3AF;
            font-size: 11px;
            font-weight: 500;
            transition: color 0.2s ease;
        }

        .tabbar-link svg {
            width: 20px;
            height: 20px;
        }

        .tabbar-link:hover {
            color: var(--primary);
        }

        .tabbar-link.active {
            color: var(--primary);
        }

        .tabbar-link.download-tab .tab-icon-wrap {
            width: 32px;
            height: 32px;
            background: rgba(245, 158, 11, 0.15);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .hero {
            position: relative;
            padding: 84px 0 72px;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            right: -5%;
            top: 0;
            width: 55%;
            height: 92%;
            background: var(--panel);
            border-radius: 36px;
            z-index: 0;
        }

        .hero::after {
            content: '';
            position: absolute;
            right: 10%;
            bottom: 10%;
            width: 240px;
            height: 240px;
            background-image: radial-gradient(circle, rgba(15, 118, 110, 0.12) 1px, transparent 1px);
            background-size: 16px 16px;
            z-index: 0;
            border-radius: 24px;
        }

        .hero .container {
            position: relative;
            z-index: 1;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 56px;
            align-items: center;
        }

        .hero h1 {
            font-size: 46px;
            font-weight: 800;
            line-height: 1.2;
            color: var(--text);
            letter-spacing: -0.02em;
        }

        .hero h1 .highlight {
            color: var(--accent);
        }

        .hero-sub {
            font-size: 17px;
            color: var(--text-muted);
            margin-top: 18px;
            max-width: 480px;
            line-height: 1.7;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            margin-top: 28px;
            flex-wrap: wrap;
        }

        .hero-meta {
            display: flex;
            gap: 12px;
            margin-top: 26px;
            flex-wrap: wrap;
        }

        .hero-visual {
            position: relative;
        }

        .hero-img-wrap {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            aspect-ratio: 4 / 3;
            background: var(--panel);
        }

        .hero-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .hero-verify {
            position: absolute;
            top: -12px;
            left: -12px;
            background: var(--success);
            color: #fff;
            padding: 6px 18px;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
            box-shadow: var(--shadow-sm);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .hero-verify svg {
            width: 14px;
            height: 14px;
        }

        .topics-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .topic-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: all 0.25s ease;
            position: relative;
        }

        .topic-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(15, 118, 110, 0.35);
        }

        .topic-card:first-child {
            grid-column: span 2;
        }

        .topic-card:last-child {
            grid-column: span 2;
        }

        .topic-icon {
            width: 48px;
            height: 48px;
            background: var(--panel);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            margin-bottom: 16px;
        }

        .topic-icon svg {
            width: 24px;
            height: 24px;
        }

        .topic-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
        }

        .topic-card p {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 8px;
            line-height: 1.7;
        }

        .topic-card .topic-tag {
            display: inline-block;
            font-size: 12px;
            color: var(--primary);
            background: rgba(15, 118, 110, 0.08);
            padding: 2px 10px;
            border-radius: 999px;
            margin-top: 12px;
        }

        .path-section {
            background: var(--primary-dark);
            color: #fff;
            padding: 88px 0;
        }

        .path-section .section-header h2 {
            color: #fff;
        }

        .path-section .section-header h2::after {
            background: var(--accent);
        }

        .path-section .section-header p {
            color: rgba(255, 255, 255, 0.75);
        }

        .path-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 48px;
        }

        .path-card {
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-md);
            padding: 30px;
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all 0.25s ease;
        }

        .path-card:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-4px);
        }

        .path-num {
            font-size: 13px;
            font-weight: 800;
            color: var(--accent);
            letter-spacing: 0.12em;
            text-transform: uppercase;
        }

        .path-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-top: 10px;
            color: #fff;
        }

        .path-card p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            margin-top: 12px;
            line-height: 1.7;
        }

        .path-line {
            width: 32px;
            height: 2px;
            background: var(--accent);
            border-radius: 1px;
            margin: 16px 0 0;
        }

        .scene-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .scene-card {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: all 0.25s ease;
        }

        .scene-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: rgba(15, 118, 110, 0.3);
        }

        .scene-img {
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--panel);
        }

        .scene-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }

        .scene-card:hover .scene-img img {
            transform: scale(1.03);
        }

        .scene-body {
            padding: 20px 22px 24px;
        }

        .scene-body h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
        }

        .scene-body p {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 8px;
            line-height: 1.65;
        }

        .scene-body .scene-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            margin-top: 14px;
        }

        .scene-body .scene-link svg {
            width: 14px;
            height: 14px;
            transition: transform 0.2s ease;
        }

        .scene-body .scene-link:hover svg {
            transform: translateX(4px);
        }

        .highlights-section {
            background: var(--panel);
            padding: 72px 0;
        }

        .highlights-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }

        .highlight-item {
            display: flex;
            gap: 14px;
            align-items: flex-start;
        }

        .highlight-icon {
            width: 42px;
            height: 42px;
            background: var(--card-bg);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            flex-shrink: 0;
        }

        .highlight-icon svg {
            width: 20px;
            height: 20px;
        }

        .highlight-item h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
        }

        .highlight-item p {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 4px;
            line-height: 1.6;
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            margin-bottom: 12px;
            transition: border-color 0.2s ease;
        }

        .faq-item.open {
            border-color: rgba(15, 118, 110, 0.4);
        }

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            user-select: none;
            gap: 16px;
        }

        .faq-toggle {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--panel);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            flex-shrink: 0;
            transition: transform 0.3s ease;
        }

        .faq-item.open .faq-toggle {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }

        .faq-toggle svg {
            width: 16px;
            height: 16px;
        }

        .faq-answer {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 12px;
            line-height: 1.75;
            display: none;
            border-top: 1px solid var(--border);
            padding-top: 14px;
        }

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

        .cta-section {
            padding: 72px 0;
        }

        .cta-box {
            background: var(--panel);
            border-radius: var(--radius-lg);
            padding: 56px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-box::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), transparent);
        }

        .cta-box h2 {
            font-size: 30px;
            font-weight: 800;
            color: var(--text);
        }

        .cta-box p {
            color: var(--text-muted);
            margin-top: 12px;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
            font-size: 15px;
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            margin-top: 28px;
            flex-wrap: wrap;
        }

        .site-footer {
            background: var(--primary-dark);
            color: #fff;
            padding: 56px 0 0;
            position: relative;
        }

        .site-footer::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), transparent);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-brand .brand-icon {
            background: var(--primary);
        }

        .footer-brand .brand-text {
            color: #fff;
            font-weight: 800;
        }

        .footer-desc {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 14px;
            max-width: 260px;
            line-height: 1.7;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul li {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 13px;
            transition: color 0.2s ease;
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 20px 0;
            text-align: center;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.7);
        }

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

        @media (max-width: 991.98px) {
            .main-nav {
                display: none;
            }

            .header-cta {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .mobile-tabbar {
                display: block;
            }

            .hero-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .hero::before {
                width: 100%;
                right: 0;
                border-radius: 0 0 36px 36px;
                height: 50%;
            }

            .hero h1 {
                font-size: 38px;
            }

            .topics-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .topic-card:first-child,
            .topic-card:last-child {
                grid-column: span 1;
            }

            .path-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .scene-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .highlights-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 767.98px) {
            body {
                padding-bottom: 56px;
            }

            .section {
                padding: 56px 0;
            }

            .container {
                padding-left: 20px;
                padding-right: 20px;
            }

            .site-header {
                height: 60px;
            }

            .header-inner {
                height: 60px;
            }

            .brand-icon {
                width: 32px;
                height: 32px;
                font-size: 12px;
                border-radius: 8px;
            }

            .brand-text {
                font-size: 16px;
            }

            .hero {
                padding: 48px 0 56px;
            }

            .hero h1 {
                font-size: 28px;
                line-height: 1.25;
            }

            .hero-sub {
                font-size: 15px;
                margin-top: 12px;
            }

            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .hero-actions .btn {
                justify-content: center;
            }

            .hero-img-wrap {
                border-radius: 12px;
            }

            .hero-verify {
                top: -8px;
                left: 8px;
                font-size: 12px;
                padding: 4px 12px;
            }

            .section-header h2 {
                font-size: 24px;
            }

            .section-header p {
                font-size: 14px;
            }

            .topics-grid {
                grid-template-columns: 1fr;
            }

            .topic-card {
                padding: 22px;
            }

            .path-section {
                padding: 56px 0;
            }

            .path-grid {
                grid-template-columns: 1fr;
                margin-top: 32px;
            }

            .scene-grid {
                grid-template-columns: 1fr;
            }

            .highlights-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .cta-box {
                padding: 40px 24px;
            }

            .cta-box h2 {
                font-size: 24px;
            }

            .cta-actions {
                flex-direction: column;
                align-items: stretch;
            }

            .cta-actions .btn {
                justify-content: center;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .footer-desc {
                max-width: none;
            }
        }