/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #60a5fa;
            --primary-gradient: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
            --secondary: #06b6d4;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --bg-white: #ffffff;
            --bg-light: #f8fafc;
            --bg-dark: #0f172a;
            --bg-card: #ffffff;
            --text-primary: #1e293b;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --text-white: #ffffff;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 24px rgba(0,0,0,0.06);
            --shadow-md: 0 8px 32px rgba(0,0,0,0.08);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
            --shadow-hover: 0 20px 56px rgba(37,99,235,0.15);
            --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
            --font-sans: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Helvetica Neue, Arial, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== 基础 Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text-primary);
            background: var(--bg-light);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        button { cursor: pointer; font-family: inherit; font-size: inherit; border: none; background: none; }
        input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
        h2 { font-size: clamp(1.5rem, 3.5vw, 2.4rem); }
        h3 { font-size: clamp(1.1rem, 2vw, 1.5rem); }
        h4 { font-size: 1.125rem; }
        p { margin-bottom: 0.5rem; color: var(--text-secondary); }

        /* ===== 容器 ===== */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container { padding: 0 16px; }
        }

        /* ===== 通用板块 ===== */
        .section { padding: 80px 0; }
        .section-dark { background: var(--bg-dark); }
        .section-light { background: var(--bg-light); }
        .section-white { background: var(--bg-white); }
        .section-gradient { background: var(--primary-gradient); }
        .section-title {
            text-align: center;
            margin-bottom: 16px;
            font-weight: 800;
            letter-spacing: -0.02em;
        }
        .section-subtitle {
            text-align: center;
            max-width: 640px;
            margin: 0 auto 48px;
            color: var(--text-secondary);
            font-size: 1.1rem;
            line-height: 1.7;
        }
        .section-dark .section-title { color: var(--text-white); }
        .section-dark .section-subtitle { color: rgba(255,255,255,0.7); }
        .section-gradient .section-title { color: var(--text-white); }
        .section-gradient .section-subtitle { color: rgba(255,255,255,0.85); }

        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(37,99,235,0.1);
            color: var(--primary);
            border: 1px solid rgba(37,99,235,0.15);
            margin-bottom: 16px;
        }
        .section-dark .badge { background: rgba(255,255,255,0.12); color: var(--text-white); border-color: rgba(255,255,255,0.2); }
        .section-gradient .badge { background: rgba(255,255,255,0.15); color: var(--text-white); border-color: rgba(255,255,255,0.25); }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            border: 2px solid transparent;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(37,99,235,0.3);
        }
        .btn-primary:focus-visible { outline: 3px solid var(--primary-light); outline-offset: 2px; }
        .btn-secondary {
            background: transparent;
            color: var(--text-white);
            border-color: rgba(255,255,255,0.4);
        }
        .btn-secondary:hover {
            background: rgba(255,255,255,0.12);
            border-color: rgba(255,255,255,0.7);
            transform: translateY(-2px);
        }
        .btn-secondary:focus-visible { outline: 3px solid rgba(255,255,255,0.5); outline-offset: 2px; }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: var(--text-white);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37,99,235,0.2);
        }
        .btn-outline:focus-visible { outline: 3px solid var(--primary-light); outline-offset: 2px; }
        .btn-lg { padding: 16px 36px; font-size: 1.05rem; }
        .btn-sm { padding: 8px 20px; font-size: 0.85rem; }
        .btn .fa-arrow-right { transition: transform 0.3s ease; }
        .btn:hover .fa-arrow-right { transform: translateX(4px); }

        /* ===== 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
        }
        .header.scrolled { box-shadow: 0 2px 32px rgba(0,0,0,0.06); }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--text-primary);
            letter-spacing: -0.02em;
        }
        .header-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--primary-gradient);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .header-logo .logo-text { white-space: nowrap; }
        .header-logo .logo-text-short { display: none; }
        @media (max-width: 640px) {
            .header-logo .logo-text { display: none; }
            .header-logo .logo-text-short { display: inline; }
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .header-nav a {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 6px 0;
            position: relative;
            transition: var(--transition);
        }
        .header-nav a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
        }
        .header-nav a:hover { color: var(--text-primary); }
        .header-nav a:hover::after { width: 100%; }
        .header-nav a.active { color: var(--primary); font-weight: 600; }
        .header-nav a.active::after { width: 100%; }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .header-actions .search-toggle {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            background: var(--bg-light);
            transition: var(--transition);
            font-size: 1rem;
        }
        .header-actions .search-toggle:hover { background: var(--border); color: var(--text-primary); }
        .header-actions .btn-header {
            padding: 8px 20px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.85rem;
            background: var(--primary);
            color: var(--text-white);
            border: 2px solid var(--primary);
            transition: var(--transition);
        }
        .header-actions .btn-header:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 8px 24px rgba(37,99,235,0.25);
        }

        /* 移动端菜单按钮 */
        .menu-toggle {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            font-size: 1.3rem;
            background: var(--bg-light);
            transition: var(--transition);
        }
        .menu-toggle:hover { background: var(--border); }

        /* 移动端导航抽屉 */
        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: rgba(255,255,255,0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            padding: 20px 24px;
            box-shadow: 0 16px 48px rgba(0,0,0,0.08);
            z-index: 999;
            transform: translateY(-10px);
            opacity: 0;
            pointer-events: none;
            transition: var(--transition);
        }
        .mobile-menu.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-menu a {
            display: block;
            padding: 12px 0;
            font-size: 1rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .mobile-menu a:last-child { border-bottom: none; }
        .mobile-menu a:hover { color: var(--primary); padding-left: 8px; }
        .mobile-menu a.active { color: var(--primary); font-weight: 600; }
        .mobile-menu .btn-mobile {
            display: block;
            text-align: center;
            padding: 14px;
            margin-top: 12px;
            border-radius: 50px;
            background: var(--primary);
            color: var(--text-white);
            font-weight: 600;
            border: none;
        }
        .mobile-menu .btn-mobile:hover { background: var(--primary-dark); padding-left: 0; color: var(--text-white); }

        @media (max-width: 768px) {
            .header-nav { display: none; }
            .header-actions .btn-header { display: none; }
            .menu-toggle { display: flex; }
            .mobile-menu { display: block; }
        }

        /* ===== Hero / 首屏 ===== */
        .hero {
            position: relative;
            min-height: 90vh;
            display: flex;
            align-items: center;
            background: var(--bg-dark);
            overflow: hidden;
            margin-top: var(--header-height);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            mix-blend-mode: overlay;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,23,42,0.92) 0%, rgba(15,23,42,0.7) 50%, rgba(6,182,212,0.15) 100%);
        }
        .hero .container {
            position: relative;
            z-index: 2;
            padding-top: 40px;
            padding-bottom: 40px;
        }
        .hero-content {
            max-width: 720px;
        }
        .hero-badge {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            background: rgba(37,99,235,0.2);
            color: var(--primary-light);
            border: 1px solid rgba(37,99,235,0.25);
            margin-bottom: 24px;
            letter-spacing: 0.3px;
        }
        .hero h1 {
            font-size: clamp(2.2rem, 6vw, 3.6rem);
            font-weight: 900;
            color: var(--text-white);
            line-height: 1.1;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
        }
        .hero h1 .highlight {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: clamp(1rem, 2vw, 1.2rem);
            color: rgba(255,255,255,0.75);
            max-width: 560px;
            line-height: 1.7;
            margin-bottom: 32px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
            margin-top: 56px;
            padding-top: 32px;
            border-top: 1px solid rgba(255,255,255,0.1);
        }
        .hero-stat h4 {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.02em;
        }
        .hero-stat h4 span { color: var(--primary-light); }
        .hero-stat p {
            font-size: 0.85rem;
            color: rgba(255,255,255,0.55);
            margin-top: 2px;
        }
        @media (max-width: 640px) {
            .hero { min-height: 80vh; }
            .hero-stats { gap: 24px; }
            .hero-stat h4 { font-size: 1.4rem; }
        }

        /* ===== 优势板块 ===== */
        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .advantage-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            border: 1px solid var(--border);
            transition: var(--transition);
            text-align: center;
        }
        .advantage-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(37,99,235,0.15);
        }
        .advantage-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: rgba(37,99,235,0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 1.5rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .advantage-card:hover .advantage-icon {
            background: var(--primary);
            color: var(--text-white);
            transform: scale(1.05);
        }
        .advantage-card h3 { font-size: 1.1rem; margin-bottom: 10px; }
        .advantage-card p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.6; }
        @media (max-width: 1024px) {
            .advantages-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 520px) {
            .advantages-grid { grid-template-columns: 1fr; }
        }

        /* ===== 功能板块 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 24px;
            border: 1px solid var(--border);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            align-items: flex-start;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(37,99,235,0.12);
        }
        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            background: var(--primary-gradient);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.2rem;
            margin-bottom: 18px;
        }
        .feature-card h3 { font-size: 1.05rem; margin-bottom: 8px; }
        .feature-card p { font-size: 0.88rem; color: var(--text-muted); line-height: 1.6; }
        @media (max-width: 768px) {
            .features-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 520px) {
            .features-grid { grid-template-columns: 1fr; }
        }

        /* ===== 流程板块 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            border: 1px solid var(--border);
            text-align: center;
            position: relative;
            transition: var(--transition);
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-number {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary-gradient);
            color: white;
            font-weight: 800;
            font-size: 1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
        }
        .step-card h3 { font-size: 1.05rem; margin-bottom: 8px; }
        .step-card p { font-size: 0.88rem; color: var(--text-muted); line-height: 1.6; }
        .step-connector { display: none; }
        @media (max-width: 1024px) {
            .steps-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
        }
        @media (max-width: 520px) {
            .steps-grid { grid-template-columns: 1fr; }
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            text-align: center;
        }
        .stat-item h3 {
            font-size: 2.4rem;
            font-weight: 900;
            color: var(--text-white);
            letter-spacing: -0.02em;
        }
        .stat-item h3 span { color: var(--primary-light); }
        .stat-item p {
            font-size: 0.95rem;
            color: rgba(255,255,255,0.6);
            margin-top: 4px;
        }
        .stat-divider { width: 40px; height: 3px; background: var(--primary-gradient); margin: 12px auto; border-radius: 4px; }
        @media (max-width: 768px) {
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
            .stat-item h3 { font-size: 1.8rem; }
        }
        @media (max-width: 520px) {
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
        }

        /* ===== 分类入口 ===== */
        .category-card {
            display: flex;
            align-items: center;
            gap: 40px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            padding: 40px;
            transition: var(--transition);
        }
        .category-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(37,99,235,0.12);
        }
        .category-image {
            flex-shrink: 0;
            width: 280px;
            height: 180px;
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--bg-light);
        }
        .category-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .category-card:hover .category-image img { transform: scale(1.05); }
        .category-info { flex: 1; }
        .category-info .cat-label {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(37,99,235,0.08);
            color: var(--primary);
            margin-bottom: 12px;
        }
        .category-info h3 { font-size: 1.3rem; margin-bottom: 10px; }
        .category-info p { font-size: 0.92rem; color: var(--text-muted); margin-bottom: 18px; line-height: 1.7; }
        @media (max-width: 768px) {
            .category-card { flex-direction: column; padding: 24px; gap: 20px; }
            .category-image { width: 100%; height: 200px; }
        }

        /* ===== 最新资讯 (CMS) ===== */
        .posts-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .post-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .post-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(37,99,235,0.12);
        }
        .post-thumb {
            height: 180px;
            background: var(--bg-light);
            overflow: hidden;
        }
        .post-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .post-card:hover .post-thumb img { transform: scale(1.05); }
        .post-body { padding: 20px; flex: 1; display: flex; flex-direction: column; }
        .post-cat {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(37,99,235,0.08);
            color: var(--primary);
            margin-bottom: 10px;
            align-self: flex-start;
        }
        .post-body h4 {
            font-size: 1rem;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 8px;
            flex: 1;
        }
        .post-body h4 a { color: var(--text-primary); }
        .post-body h4 a:hover { color: var(--primary); }
        .post-body p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.8rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border-light);
            padding-top: 12px;
            margin-top: auto;
        }
        .post-meta .fa-regular { margin-right: 4px; }
        .empty-posts {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-muted);
            font-size: 1rem;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
        }
        @media (max-width: 1024px) {
            .posts-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 520px) {
            .posts-grid { grid-template-columns: 1fr; }
            .post-thumb { height: 200px; }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 720px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: rgba(37,99,235,0.15); }
        .faq-question {
            width: 100%;
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            background: none;
            text-align: left;
            transition: var(--transition);
        }
        .faq-question:hover { color: var(--primary); }
        .faq-question .fa-chevron-down {
            font-size: 0.85rem;
            color: var(--text-muted);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question .fa-chevron-down { transform: rotate(180deg); color: var(--primary); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }
        .faq-answer p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-box {
            background: var(--primary-gradient);
            border-radius: var(--radius-lg);
            padding: 64px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: rgba(255,255,255,0.05);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-box::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: -10%;
            width: 300px;
            height: 300px;
            background: rgba(255,255,255,0.04);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-box .container { position: relative; z-index: 1; }
        .cta-box h2 {
            color: var(--text-white);
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            margin-bottom: 12px;
        }
        .cta-box p {
            color: rgba(255,255,255,0.8);
            font-size: 1.05rem;
            max-width: 520px;
            margin: 0 auto 28px;
        }
        .cta-box .btn-white {
            background: var(--text-white);
            color: var(--primary);
            border-color: var(--text-white);
        }
        .cta-box .btn-white:hover {
            background: rgba(255,255,255,0.9);
            border-color: rgba(255,255,255,0.9);
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(0,0,0,0.15);
        }
        .cta-box .btn-outline-white {
            background: transparent;
            color: var(--text-white);
            border-color: rgba(255,255,255,0.5);
        }
        .cta-box .btn-outline-white:hover {
            background: rgba(255,255,255,0.12);
            border-color: rgba(255,255,255,0.8);
            transform: translateY(-2px);
        }
        .cta-actions { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }
        @media (max-width: 640px) {
            .cta-box { padding: 40px 24px; }
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-dark);
            padding: 60px 0 32px;
            border-top: 1px solid rgba(255,255,255,0.06);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.2rem;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .footer-brand .footer-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--primary-gradient);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.1rem;
        }
        .footer-brand p {
            font-size: 0.88rem;
            color: rgba(255,255,255,0.5);
            line-height: 1.7;
            max-width: 300px;
        }
        .footer-col h4 {
            color: var(--text-white);
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.5);
            font-size: 0.88rem;
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--primary-light); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
        }
        .footer-bottom p {
            font-size: 0.82rem;
            color: rgba(255,255,255,0.35);
        }
        .footer-bottom a { color: rgba(255,255,255,0.4); }
        .footer-bottom a:hover { color: var(--primary-light); }
        .footer-socials {
            display: flex;
            gap: 12px;
        }
        .footer-socials a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255,255,255,0.4);
            font-size: 0.95rem;
            transition: var(--transition);
        }
        .footer-socials a:hover {
            background: var(--primary);
            color: var(--text-white);
            transform: translateY(-2px);
        }
        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ===== 回到顶部 ===== */
        .back-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: 0 8px 24px rgba(37,99,235,0.3);
            opacity: 0;
            transform: translateY(20px);
            pointer-events: none;
            transition: var(--transition);
            z-index: 100;
        }
        .back-top.visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
        .back-top:hover { background: var(--primary-dark); transform: translateY(-4px); box-shadow: 0 12px 32px rgba(37,99,235,0.4); }

        /* ===== 响应式微调 ===== */
        @media (max-width: 1024px) {
            .section { padding: 60px 0; }
        }
        @media (max-width: 768px) {
            .section { padding: 48px 0; }
            .section-subtitle { margin-bottom: 32px; font-size: 1rem; }
        }
        @media (max-width: 520px) {
            .section { padding: 40px 0; }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #3b82f6;
            --primary-bg: #eff6ff;
            --secondary: #0f172a;
            --secondary-light: #1e293b;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --bg-dark: #0f172a;
            --text: #1e293b;
            --text-light: #64748b;
            --text-white: #f1f5f9;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 24px rgba(0,0,0,0.06);
            --shadow-md: 0 8px 40px rgba(0,0,0,0.10);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.12);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== 基础 Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--secondary); }
        h1 { font-size: 2.75rem; }
        h2 { font-size: 2.25rem; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.125rem; }
        p { margin-bottom: 1rem; }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container { padding: 0 16px; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.75rem; }
            h3 { font-size: 1.25rem; }
        }
        @media (max-width: 520px) {
            h1 { font-size: 1.75rem; }
            h2 { font-size: 1.5rem; }
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            line-height: 1.4;
            background: var(--primary);
            color: #fff;
        }
        .btn:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(37,99,235,0.30); }
        .btn:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(37,99,235,0.20); }
        .btn:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover { background: var(--primary); color: #fff; border-color: var(--primary); }
        .btn-accent { background: var(--accent); color: #fff; }
        .btn-accent:hover { background: var(--accent-dark); box-shadow: 0 8px 24px rgba(245,158,11,0.35); }
        .btn-sm { padding: 8px 18px; font-size: 0.85rem; }
        .btn-lg { padding: 16px 36px; font-size: 1.05rem; }
        @media (max-width: 520px) {
            .btn { padding: 10px 20px; font-size: 0.9rem; }
            .btn-lg { padding: 14px 28px; font-size: 1rem; }
        }

        /* ===== 标签/徽章 ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--primary-bg);
            color: var(--primary);
            border: 1px solid rgba(37,99,235,0.15);
            white-space: nowrap;
        }
        .badge-accent { background: #fef3c7; color: var(--accent-dark); border-color: rgba(245,158,11,0.2); }
        .badge-green { background: #ecfdf5; color: #059669; border-color: rgba(5,150,105,0.15); }

        /* ===== 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-height);
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            transition: var(--transition);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--secondary);
            font-weight: 800;
            font-size: 1.35rem;
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }
        .header-logo .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 1.1rem;
        }
        .header-logo:hover { color: var(--secondary); }
        .header-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .header-nav a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            color: var(--text-light);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            position: relative;
        }
        .header-nav a:hover { color: var(--primary); background: var(--primary-bg); }
        .header-nav a.active { color: var(--primary); background: var(--primary-bg); font-weight: 600; }
        .header-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .header-search {
            display: flex;
            align-items: center;
            background: var(--bg-alt);
            border-radius: 50px;
            padding: 0 16px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .header-search:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,0.10); }
        .header-search input {
            border: none;
            background: transparent;
            padding: 8px 0;
            font-size: 0.9rem;
            color: var(--text);
            width: 160px;
            outline: none;
        }
        .header-search input::placeholder { color: var(--text-light); }
        .header-search button {
            background: none;
            border: none;
            color: var(--text-light);
            cursor: pointer;
            padding: 6px;
            font-size: 0.95rem;
            transition: var(--transition);
        }
        .header-search button:hover { color: var(--primary); }
        .header-mobile-toggle { display: none; background: none; border: none; font-size: 1.6rem; color: var(--secondary); cursor: pointer; padding: 4px; }
        @media (max-width: 1024px) {
            .header-search input { width: 120px; }
        }
        @media (max-width: 768px) {
            .header-nav { display: none; position: absolute; top: var(--header-height); left: 0; width: 100%; background: rgba(255,255,255,0.98); backdrop-filter: blur(16px); border-bottom: 1px solid var(--border); flex-direction: column; padding: 16px 24px; gap: 4px; }
            .header-nav.open { display: flex; }
            .header-nav a { width: 100%; padding: 12px 16px; }
            .header-nav a.active::after { display: none; }
            .header-nav a.active { background: var(--primary-bg); border-left: 3px solid var(--primary); }
            .header-search { display: none; }
            .header-actions .btn { padding: 8px 16px; font-size: 0.85rem; }
            .header-mobile-toggle { display: block; }
        }
        @media (max-width: 520px) {
            .header-logo { font-size: 1.1rem; }
            .header-logo .logo-icon { width: 32px; height: 32px; font-size: 0.95rem; }
        }

        /* ===== 页面 Banner ===== */
        .page-banner {
            padding: 140px 0 80px;
            background: var(--secondary);
            position: relative;
            overflow: hidden;
            min-height: 360px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25;
            mix-blend-mode: overlay;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,23,42,0.88) 0%, rgba(30,41,59,0.70) 100%);
        }
        .page-banner .container { position: relative; z-index: 2; text-align: center; }
        .page-banner .badge { margin-bottom: 16px; }
        .page-banner h1 { color: #fff; margin-bottom: 16px; font-size: 3rem; letter-spacing: -0.5px; }
        .page-banner p { color: rgba(255,255,255,0.75); font-size: 1.15rem; max-width: 720px; margin: 0 auto 28px; line-height: 1.7; }
        .page-banner .banner-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
        .page-banner .btn { font-size: 1rem; padding: 14px 32px; }
        @media (max-width: 768px) {
            .page-banner { padding: 120px 0 60px; min-height: 300px; }
            .page-banner h1 { font-size: 2.2rem; }
            .page-banner p { font-size: 1rem; }
            .page-banner .btn { padding: 12px 24px; font-size: 0.95rem; }
        }
        @media (max-width: 520px) {
            .page-banner { padding: 100px 0 48px; min-height: 260px; }
            .page-banner h1 { font-size: 1.8rem; }
            .page-banner p { font-size: 0.95rem; }
            .page-banner .banner-actions { flex-direction: column; align-items: center; }
        }

        /* ===== 板块通用 ===== */
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-alt); }
        .section-dark { background: var(--bg-dark); color: var(--text-white); }
        .section-dark h2, .section-dark h3, .section-dark h4 { color: #fff; }
        .section-dark .text-light { color: rgba(255,255,255,0.6); }
        .section-header { text-align: center; margin-bottom: 52px; }
        .section-header .badge { margin-bottom: 12px; }
        .section-header h2 { margin-bottom: 12px; }
        .section-header p { color: var(--text-light); font-size: 1.1rem; max-width: 640px; margin: 0 auto; }
        .section-dark .section-header p { color: rgba(255,255,255,0.6); }
        @media (max-width: 768px) {
            .section { padding: 56px 0; }
            .section-header { margin-bottom: 36px; }
            .section-header p { font-size: 1rem; }
        }
        @media (max-width: 520px) {
            .section { padding: 40px 0; }
        }

        /* ===== 网格 ===== */
        .grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
        .grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 28px; }
        .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        @media (max-width: 1024px) {
            .grid-4 { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; gap: 24px; }
        }

        /* ===== 卡片 ===== */
        .card {
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 28px;
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }
        .card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .card-img { border-radius: var(--radius-sm); overflow: hidden; margin-bottom: 18px; }
        .card-img img { width: 100%; height: 200px; object-fit: cover; transition: var(--transition); }
        .card:hover .card-img img { transform: scale(1.03); }
        .card .badge { margin-bottom: 10px; }
        .card h3 { margin-bottom: 10px; font-size: 1.25rem; }
        .card h3 a { color: var(--secondary); }
        .card h3 a:hover { color: var(--primary); }
        .card p { color: var(--text-light); font-size: 0.95rem; margin-bottom: 16px; }
        .card .card-meta { display: flex; align-items: center; gap: 16px; font-size: 0.85rem; color: var(--text-light); border-top: 1px solid var(--border); padding-top: 16px; margin-top: 8px; }
        .card .card-link { font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; font-size: 0.95rem; }
        .card .card-link:hover { gap: 10px; }
        .card-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: #fff;
            margin-bottom: 16px;
            background: var(--primary);
        }
        .card-icon.green { background: #059669; }
        .card-icon.accent { background: var(--accent); }
        .card-icon.purple { background: #7c3aed; }
        .card-icon.rose { background: #e11d48; }
        .card-list { list-style: none; margin-top: 12px; }
        .card-list li { display: flex; align-items: flex-start; gap: 10px; padding: 8px 0; font-size: 0.95rem; color: var(--text); border-bottom: 1px solid var(--border-light); }
        .card-list li:last-child { border-bottom: none; }
        .card-list li i { color: var(--primary); margin-top: 3px; flex-shrink: 0; }
        .section-dark .card { background: var(--secondary-light); border-color: rgba(255,255,255,0.06); }
        .section-dark .card h3, .section-dark .card h3 a { color: #fff; }
        .section-dark .card p { color: rgba(255,255,255,0.65); }
        .section-dark .card .card-meta { border-color: rgba(255,255,255,0.08); color: rgba(255,255,255,0.5); }
        @media (max-width: 520px) {
            .card { padding: 20px; }
            .card-img img { height: 160px; }
        }

        /* ===== 图文区块 ===== */
        .split-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .split-block.reverse { direction: rtl; }
        .split-block.reverse > * { direction: ltr; }
        .split-block .visual {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .split-block .visual img { width: 100%; height: 400px; object-fit: cover; }
        .split-block .content .badge { margin-bottom: 12px; }
        .split-block .content h2 { margin-bottom: 16px; }
        .split-block .content p { color: var(--text-light); font-size: 1.05rem; }
        .split-block .content .feature-list { margin-top: 20px; }
        .split-block .content .feature-list li { display: flex; align-items: center; gap: 12px; padding: 8px 0; font-size: 1rem; }
        .split-block .content .feature-list li i { color: var(--primary); font-size: 1.1rem; width: 20px; }
        @media (max-width: 768px) {
            .split-block { grid-template-columns: 1fr; gap: 32px; }
            .split-block.reverse { direction: ltr; }
            .split-block .visual img { height: 260px; }
        }
        @media (max-width: 520px) {
            .split-block { gap: 24px; }
            .split-block .visual img { height: 200px; }
        }

        /* ===== 统计数字 ===== */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .stat-card { text-align: center; padding: 32px 16px; background: rgba(255,255,255,0.04); border-radius: var(--radius); border: 1px solid rgba(255,255,255,0.08); }
        .stat-card .number { font-size: 2.8rem; font-weight: 800; color: #fff; line-height: 1.2; }
        .stat-card .number span { color: var(--accent); }
        .stat-card .label { color: rgba(255,255,255,0.6); font-size: 0.95rem; margin-top: 8px; }
        @media (max-width: 768px) {
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .stat-card .number { font-size: 2.2rem; }
        }
        @media (max-width: 520px) {
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .stat-card { padding: 20px 12px; }
            .stat-card .number { font-size: 1.8rem; }
        }

        /* ===== 步骤/流程 ===== */
        .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
        .step-card { background: #fff; border-radius: var(--radius); padding: 28px 24px; box-shadow: var(--shadow); border: 1px solid var(--border-light); position: relative; transition: var(--transition); }
        .step-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .step-card::before { counter-increment: step; content: "0" counter(step); position: absolute; top: 16px; right: 20px; font-size: 2.8rem; font-weight: 800; color: var(--border); line-height: 1; }
        .step-card .step-icon { width: 48px; height: 48px; border-radius: 50%; display: flex; align-items: center; justify-content: center; background: var(--primary-bg); color: var(--primary); font-size: 1.2rem; margin-bottom: 16px; }
        .step-card h4 { margin-bottom: 8px; font-size: 1.1rem; }
        .step-card p { color: var(--text-light); font-size: 0.92rem; margin-bottom: 0; }
        .section-dark .step-card { background: var(--secondary-light); border-color: rgba(255,255,255,0.06); }
        .section-dark .step-card h4 { color: #fff; }
        .section-dark .step-card p { color: rgba(255,255,255,0.6); }
        .section-dark .step-card::before { color: rgba(255,255,255,0.08); }
        .section-dark .step-card .step-icon { background: rgba(37,99,235,0.2); color: var(--primary-light); }
        @media (max-width: 768px) {
            .steps { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 520px) {
            .steps { grid-template-columns: 1fr; }
            .step-card { padding: 20px 18px; }
            .step-card::before { font-size: 2.2rem; top: 12px; right: 16px; }
        }

        /* ===== FAQ ===== */
        .faq-list { max-width: 820px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item { background: #fff; border-radius: var(--radius); border: 1px solid var(--border); overflow: hidden; transition: var(--transition); }
        .faq-item:hover { border-color: var(--primary); box-shadow: 0 2px 12px rgba(37,99,235,0.06); }
        .faq-question { display: flex; align-items: center; justify-content: space-between; padding: 20px 24px; cursor: pointer; font-weight: 600; font-size: 1.05rem; color: var(--secondary); background: none; border: none; width: 100%; text-align: left; transition: var(--transition); gap: 16px; }
        .faq-question:hover { color: var(--primary); }
        .faq-question i { font-size: 1.1rem; color: var(--text-light); transition: var(--transition); flex-shrink: 0; }
        .faq-item.active .faq-question i { transform: rotate(180deg); color: var(--primary); }
        .faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease; padding: 0 24px; }
        .faq-item.active .faq-answer { max-height: 300px; padding: 0 24px 20px; }
        .faq-answer p { color: var(--text-light); font-size: 0.95rem; margin-bottom: 0; line-height: 1.7; }
        .section-dark .faq-item { background: var(--secondary-light); border-color: rgba(255,255,255,0.08); }
        .section-dark .faq-question { color: #fff; }
        .section-dark .faq-question i { color: rgba(255,255,255,0.5); }
        .section-dark .faq-answer p { color: rgba(255,255,255,0.65); }
        @media (max-width: 520px) {
            .faq-question { padding: 16px 18px; font-size: 0.95rem; }
            .faq-item.active .faq-answer { padding: 0 18px 16px; }
        }

        /* ===== CTA ===== */
        .cta {
            padding: 72px 0;
            text-align: center;
            background: var(--secondary);
            position: relative;
            overflow: hidden;
        }
        .cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.10;
            mix-blend-mode: overlay;
        }
        .cta .container { position: relative; z-index: 2; }
        .cta h2 { color: #fff; margin-bottom: 12px; }
        .cta p { color: rgba(255,255,255,0.65); font-size: 1.1rem; max-width: 600px; margin: 0 auto 28px; }
        .cta .btn { font-size: 1.05rem; padding: 16px 36px; }
        @media (max-width: 520px) {
            .cta { padding: 48px 0; }
            .cta .btn { padding: 14px 28px; font-size: 0.95rem; }
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-dark);
            color: var(--text-white);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.3rem;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-logo .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            border-radius: var(--radius-sm);
            color: #fff;
            font-size: 1rem;
        }
        .footer-brand p { color: rgba(255,255,255,0.5); font-size: 0.92rem; line-height: 1.7; max-width: 320px; }
        .footer-col h4 { color: #fff; font-size: 1rem; margin-bottom: 16px; font-weight: 600; }
        .footer-col a { display: block; color: rgba(255,255,255,0.5); font-size: 0.92rem; padding: 5px 0; transition: var(--transition); }
        .footer-col a:hover { color: var(--primary-light); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0;
            gap: 16px;
            flex-wrap: wrap;
        }
        .footer-bottom p { color: rgba(255,255,255,0.4); font-size: 0.85rem; margin-bottom: 0; }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--primary-light); }
        .footer-socials { display: flex; gap: 12px; }
        .footer-socials a { color: rgba(255,255,255,0.4); font-size: 1.1rem; padding: 6px; border-radius: 50%; transition: var(--transition); display: flex; align-items: center; justify-content: center; }
        .footer-socials a:hover { color: #fff; background: rgba(255,255,255,0.06); }
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }
        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 20px 0 0;
            font-size: 0.88rem;
            color: var(--text-light);
            flex-wrap: wrap;
        }
        .breadcrumb a { color: var(--text-light); }
        .breadcrumb a:hover { color: var(--primary); }
        .breadcrumb span { color: var(--text); font-weight: 500; }
        .breadcrumb i { font-size: 0.7rem; color: var(--text-light); }
        .section-dark .breadcrumb { color: rgba(255,255,255,0.5); }
        .section-dark .breadcrumb a { color: rgba(255,255,255,0.5); }
        .section-dark .breadcrumb span { color: #fff; }
        .section-dark .breadcrumb i { color: rgba(255,255,255,0.3); }

        /* ===== 工具类 ===== */
        .text-center { text-align: center; }
        .mt-8 { margin-top: 8px; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }
        .mt-32 { margin-top: 32px; }
        .mb-8 { margin-bottom: 8px; }
        .mb-16 { margin-bottom: 16px; }
        .mb-24 { margin-bottom: 24px; }
        .gap-8 { gap: 8px; }
        .gap-12 { gap: 12px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .flex-wrap { flex-wrap: wrap; }
        .text-light { color: var(--text-light); }

        /* ===== 分类筛选条 ===== */
        .filter-bar {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            padding: 16px 0;
            margin-bottom: 32px;
            border-bottom: 1px solid var(--border);
        }
        .filter-bar .filter-label { font-weight: 600; font-size: 0.9rem; color: var(--text); margin-right: 8px; }
        .filter-bar .filter-tag {
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            background: var(--bg-alt);
            color: var(--text-light);
            border: 1px solid var(--border);
            cursor: pointer;
            transition: var(--transition);
        }
        .filter-bar .filter-tag:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-bg); }
        .filter-bar .filter-tag.active { background: var(--primary); color: #fff; border-color: var(--primary); }
        @media (max-width: 520px) {
            .filter-bar { gap: 8px; }
            .filter-bar .filter-tag { padding: 5px 14px; font-size: 0.8rem; }
        }

        /* ===== 分页 ===== */
        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin-top: 48px;
        }
        .pagination a, .pagination span {
            display: flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text);
            background: #fff;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .pagination a:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-bg); }
        .pagination .active { background: var(--primary); color: #fff; border-color: var(--primary); }
        .pagination .disabled { opacity: 0.4; pointer-events: none; }
        @media (max-width: 520px) {
            .pagination { gap: 4px; }
            .pagination a, .pagination span { min-width: 34px; height: 34px; font-size: 0.8rem; }
        }

        /* ===== 动画 ===== */
        @keyframes fadeUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
        .animate-fade-up { animation: fadeUp 0.6s ease forwards; }
        .animate-delay-1 { animation-delay: 0.1s; }
        .animate-delay-2 { animation-delay: 0.2s; }
        .animate-delay-3 { animation-delay: 0.3s; }
        .animate-delay-4 { animation-delay: 0.4s; }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #2563eb;
            --color-primary-dark: #1d4ed8;
            --color-primary-light: #60a5fa;
            --color-secondary: #06b6d4;
            --color-secondary-dark: #0891b2;
            --color-accent: #f59e0b;
            --color-accent-dark: #d97706;
            --color-bg-dark: #0a0e17;
            --color-bg-darker: #060a12;
            --color-bg-card: #111827;
            --color-bg-light: #f8fafc;
            --color-bg-white: #ffffff;
            --color-text-primary: #f1f5f9;
            --color-text-secondary: #94a3b8;
            --color-text-body: #1e293b;
            --color-text-muted: #64748b;
            --color-border: rgba(255, 255, 255, 0.08);
            --color-border-light: #e2e8f0;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.25);
            --shadow-glow: 0 0 30px rgba(37, 99, 235, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--color-text-body);
            background: var(--color-bg-dark);
            overflow-x: hidden;
        }

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

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

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
        }

        ul,
        ol {
            list-style: none;
            padding: 0;
        }

        /* ===== Container ===== */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 14, 23, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            padding: 0;
            height: 64px;
            transition: var(--transition);
        }

        .site-header .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--color-text-primary);
            font-weight: 700;
            font-size: 1.25rem;
            letter-spacing: -0.3px;
            transition: var(--transition);
            flex-shrink: 0;
        }

        .logo:hover {
            color: var(--color-primary-light);
            transform: scale(1.02);
        }

        .logo .logo-icon {
            font-size: 1.5rem;
            color: var(--color-primary-light);
            background: rgba(37, 99, 235, 0.15);
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }

        .logo:hover .logo-icon {
            background: rgba(37, 99, 235, 0.25);
            box-shadow: var(--shadow-glow);
        }

        .header-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .header-nav a {
            color: var(--color-text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
            letter-spacing: 0.2px;
        }

        .header-nav a:hover {
            color: var(--color-text-primary);
            background: rgba(255, 255, 255, 0.06);
        }

        .header-nav a.active {
            color: var(--color-primary-light);
            background: rgba(37, 99, 235, 0.12);
        }

        .header-nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--color-primary-light);
            border-radius: 2px;
        }

        .menu-toggle {
            display: none;
            background: transparent;
            color: var(--color-text-primary);
            font-size: 1.4rem;
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition);
            border: 1px solid var(--color-border);
        }

        .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
            color: var(--color-primary-light);
        }

        @media (max-width: 768px) {
            .menu-toggle {
                display: block;
            }

            .header-nav {
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(10, 14, 23, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--color-border);
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
            }

            .header-nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }

            .header-nav a {
                width: 100%;
                padding: 12px 16px;
                font-size: 1rem;
            }

            .header-nav a.active::after {
                display: none;
            }

            .header-nav a.active {
                border-left: 3px solid var(--color-primary-light);
            }
        }

        /* ===== Hero / Banner ===== */
        .article-hero {
            padding: 120px 0 60px;
            background: var(--color-bg-darker);
            position: relative;
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }

        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.25;
            z-index: 0;
        }

        .article-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 23, 0.92) 0%, rgba(10, 14, 23, 0.6) 60%, rgba(10, 14, 23, 0.85) 100%);
            z-index: 1;
        }

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

        .article-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(37, 99, 235, 0.18);
            border: 1px solid rgba(37, 99, 235, 0.25);
            color: var(--color-primary-light);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 500;
            letter-spacing: 0.3px;
            margin-bottom: 16px;
        }

        .article-hero .hero-badge i {
            font-size: 0.75rem;
        }

        .article-hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--color-text-primary);
            line-height: 1.25;
            letter-spacing: -0.5px;
            max-width: 860px;
            margin-bottom: 16px;
        }

        .article-hero .hero-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px;
            color: var(--color-text-secondary);
            font-size: 0.9rem;
        }

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

        .article-hero .hero-meta i {
            color: var(--color-primary-light);
            font-size: 0.85rem;
        }

        .article-hero .hero-meta .category-tag {
            background: rgba(6, 182, 212, 0.15);
            color: var(--color-secondary);
            padding: 2px 12px;
            border-radius: 14px;
            font-size: 0.8rem;
            font-weight: 500;
        }

        @media (max-width: 768px) {
            .article-hero {
                padding: 100px 0 40px;
                min-height: auto;
            }

            .article-hero h1 {
                font-size: 1.7rem;
            }

            .article-hero .hero-meta {
                gap: 10px;
                font-size: 0.8rem;
            }
        }

        @media (max-width: 520px) {
            .article-hero h1 {
                font-size: 1.4rem;
            }
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-wrap {
            background: var(--color-bg-white);
            border-bottom: 1px solid var(--color-border-light);
            padding: 12px 0;
        }

        .breadcrumb-wrap .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--color-text-muted);
            margin: 0;
            padding: 0;
            background: none;
        }

        .breadcrumb-wrap .breadcrumb a {
            color: var(--color-text-muted);
            transition: var(--transition);
        }

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

        .breadcrumb-wrap .breadcrumb .separator {
            color: var(--color-border-light);
            font-size: 0.75rem;
        }

        .breadcrumb-wrap .breadcrumb .current {
            color: var(--color-text-body);
            font-weight: 500;
            max-width: 320px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        @media (max-width: 520px) {
            .breadcrumb-wrap .breadcrumb .current {
                max-width: 180px;
            }
        }

        /* ===== Article Content ===== */
        .article-main {
            background: var(--color-bg-white);
            padding: 48px 0 64px;
        }

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

        .article-content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--color-text-body);
        }

        .article-content h2,
        .article-content h3,
        .article-content h4 {
            margin-top: 2em;
            margin-bottom: 0.8em;
            font-weight: 700;
            color: #0f172a;
            letter-spacing: -0.3px;
        }

        .article-content h2 {
            font-size: 1.65rem;
            border-bottom: 2px solid var(--color-border-light);
            padding-bottom: 10px;
        }

        .article-content h3 {
            font-size: 1.3rem;
        }

        .article-content p {
            margin-bottom: 1.4em;
        }

        .article-content ul,
        .article-content ol {
            margin-bottom: 1.4em;
            padding-left: 1.6em;
        }

        .article-content ul {
            list-style: disc;
        }

        .article-content ol {
            list-style: decimal;
        }

        .article-content li {
            margin-bottom: 0.5em;
        }

        .article-content blockquote {
            border-left: 4px solid var(--color-primary);
            background: #f1f5f9;
            padding: 16px 24px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 1.6em 0;
            color: #334155;
            font-style: italic;
        }

        .article-content img {
            border-radius: var(--radius-md);
            margin: 1.8em auto;
            box-shadow: var(--shadow-sm);
        }

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

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

        .article-content code {
            background: #f1f5f9;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: #0f172a;
        }

        .article-content pre {
            background: #0f172a;
            color: #e2e8f0;
            padding: 20px 24px;
            border-radius: var(--radius-md);
            overflow-x: auto;
            font-size: 0.9rem;
            line-height: 1.6;
            margin: 1.6em 0;
        }

        .article-content pre code {
            background: none;
            color: inherit;
            padding: 0;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.6em 0;
            font-size: 0.95rem;
        }

        .article-content table th,
        .article-content table td {
            padding: 12px 16px;
            border: 1px solid var(--color-border-light);
            text-align: left;
        }

        .article-content table th {
            background: #f1f5f9;
            font-weight: 600;
            color: #0f172a;
        }

        .article-content table td {
            background: var(--color-bg-white);
        }

        .article-content .not-found {
            text-align: center;
            padding: 80px 20px;
            color: var(--color-text-muted);
        }

        .article-content .not-found i {
            font-size: 3rem;
            color: var(--color-border-light);
            margin-bottom: 20px;
        }

        .article-content .not-found h3 {
            font-size: 1.5rem;
            color: var(--color-text-body);
            margin-bottom: 12px;
        }

        .article-content .not-found p {
            margin-bottom: 24px;
        }

        .article-content .not-found .btn-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            background: var(--color-primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: var(--transition);
        }

        .article-content .not-found .btn-home:hover {
            background: var(--color-primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
            color: #fff;
        }

        @media (max-width: 768px) {
            .article-main {
                padding: 32px 0 40px;
            }

            .article-content {
                font-size: 0.98rem;
            }

            .article-content h2 {
                font-size: 1.35rem;
            }

            .article-content h3 {
                font-size: 1.1rem;
            }
        }

        @media (max-width: 520px) {
            .article-content {
                font-size: 0.92rem;
            }

            .article-content h2 {
                font-size: 1.2rem;
            }
        }

        /* ===== Article Footer Info ===== */
        .article-footer-info {
            margin-top: 48px;
            padding-top: 28px;
            border-top: 1px solid var(--color-border-light);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }

        .article-footer-info .tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .article-footer-info .tags .tag {
            background: #f1f5f9;
            color: var(--color-text-muted);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 500;
            transition: var(--transition);
        }

        .article-footer-info .tags .tag:hover {
            background: var(--color-primary);
            color: #fff;
        }

        .article-footer-info .share {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--color-text-muted);
            font-size: 0.85rem;
        }

        .article-footer-info .share a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: #f1f5f9;
            color: var(--color-text-muted);
            transition: var(--transition);
        }

        .article-footer-info .share a:hover {
            background: var(--color-primary);
            color: #fff;
            transform: translateY(-2px);
        }

        @media (max-width: 520px) {
            .article-footer-info {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        /* ===== Related Posts ===== */
        .related-section {
            background: var(--color-bg-light);
            padding: 64px 0;
        }

        .related-section .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            color: #0f172a;
            margin-bottom: 8px;
            letter-spacing: -0.3px;
        }

        .related-section .section-sub {
            color: var(--color-text-muted);
            font-size: 0.95rem;
            margin-bottom: 36px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 24px;
        }

        .related-card {
            background: var(--color-bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: var(--transition);
        }

        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--color-primary-light);
        }

        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            transition: var(--transition);
        }

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

        .related-card .card-body {
            padding: 20px;
        }

        .related-card .card-body .card-cat {
            display: inline-block;
            background: rgba(37, 99, 235, 0.08);
            color: var(--color-primary);
            padding: 2px 12px;
            border-radius: 12px;
            font-size: 0.75rem;
            font-weight: 500;
            margin-bottom: 10px;
        }

        .related-card .card-body h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: #0f172a;
            line-height: 1.4;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .card-body h3 a {
            color: inherit;
        }

        .related-card .card-body h3 a:hover {
            color: var(--color-primary);
        }

        .related-card .card-body .card-excerpt {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }

        .related-card .card-body .card-meta {
            font-size: 0.78rem;
            color: var(--color-text-muted);
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .related-card .card-body .card-meta i {
            margin-right: 4px;
            font-size: 0.7rem;
        }

        @media (max-width: 768px) {
            .related-section {
                padding: 40px 0;
            }

            .related-section .section-title {
                font-size: 1.35rem;
            }

            .related-grid {
                grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
                gap: 16px;
            }
        }

        @media (max-width: 520px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--color-bg-dark);
            padding: 64px 0;
            position: relative;
        }

        .faq-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.06;
            z-index: 0;
        }

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

        .faq-section .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--color-text-primary);
            margin-bottom: 8px;
            letter-spacing: -0.3px;
        }

        .faq-section .section-sub {
            color: var(--color-text-secondary);
            font-size: 0.95rem;
            margin-bottom: 40px;
        }

        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            max-width: 960px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: var(--transition);
            cursor: pointer;
        }

        .faq-item:hover {
            border-color: rgba(37, 99, 235, 0.2);
            box-shadow: var(--shadow-glow);
        }

        .faq-item .faq-question {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-weight: 600;
            color: var(--color-text-primary);
            font-size: 1rem;
            line-height: 1.5;
        }

        .faq-item .faq-question .q-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(37, 99, 235, 0.15);
            color: var(--color-primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            font-weight: 700;
        }

        .faq-item .faq-answer {
            margin-top: 12px;
            padding-left: 40px;
            color: var(--color-text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
            display: none;
        }

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

        .faq-item .faq-toggle {
            margin-left: auto;
            color: var(--color-text-secondary);
            transition: var(--transition);
            font-size: 0.85rem;
        }

        .faq-item.open .faq-toggle {
            transform: rotate(180deg);
            color: var(--color-primary-light);
        }

        @media (max-width: 768px) {
            .faq-section {
                padding: 40px 0;
            }

            .faq-section .section-title {
                font-size: 1.35rem;
            }

            .faq-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }

            .faq-item {
                padding: 18px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, #0a0e17 0%, #111827 50%, #0a0e17 100%);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }

        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-text-primary);
            margin-bottom: 12px;
            letter-spacing: -0.4px;
        }

        .cta-section p {
            font-size: 1.05rem;
            color: var(--color-text-secondary);
            max-width: 600px;
            margin: 0 auto 32px;
        }

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

        .cta-section .cta-buttons .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            background: var(--color-primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            border: 1px solid transparent;
        }

        .cta-section .cta-buttons .btn-primary:hover {
            background: var(--color-primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(37, 99, 235, 0.3);
            color: #fff;
        }

        .cta-section .cta-buttons .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            background: transparent;
            color: var(--color-text-primary);
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            border: 1px solid var(--color-border);
            transition: var(--transition);
        }

        .cta-section .cta-buttons .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.05);
            border-color: var(--color-primary-light);
            color: var(--color-primary-light);
            transform: translateY(-2px);
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 48px 0;
            }

            .cta-section h2 {
                font-size: 1.5rem;
            }

            .cta-section p {
                font-size: 0.95rem;
            }

            .cta-section .cta-buttons .btn-primary,
            .cta-section .cta-buttons .btn-secondary {
                padding: 12px 28px;
                font-size: 0.9rem;
            }
        }

        @media (max-width: 520px) {
            .cta-section .cta-buttons {
                flex-direction: column;
                align-items: center;
            }

            .cta-section .cta-buttons .btn-primary,
            .cta-section .cta-buttons .btn-secondary {
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--color-bg-darker);
            border-top: 1px solid var(--color-border);
            padding: 48px 0 24px;
            color: var(--color-text-secondary);
        }

        .footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.3fr;
            gap: 32px;
            margin-bottom: 36px;
        }

        .footer .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-text-primary);
            margin-bottom: 14px;
        }

        .footer .footer-brand .footer-logo .logo-icon {
            color: var(--color-primary-light);
            font-size: 1.3rem;
        }

        .footer .footer-brand p {
            font-size: 0.88rem;
            line-height: 1.7;
            max-width: 340px;
        }

        .footer .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-text-primary);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .footer .footer-col a {
            display: block;
            color: var(--color-text-secondary);
            font-size: 0.88rem;
            padding: 5px 0;
            transition: var(--transition);
        }

        .footer .footer-col a:hover {
            color: var(--color-primary-light);
            padding-left: 4px;
        }

        .footer .footer-bottom {
            border-top: 1px solid var(--color-border);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.82rem;
        }

        .footer .footer-bottom a {
            color: var(--color-text-secondary);
            transition: var(--transition);
        }

        .footer .footer-bottom a:hover {
            color: var(--color-primary-light);
        }

        .footer .footer-socials {
            display: flex;
            gap: 12px;
        }

        .footer .footer-socials a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            color: var(--color-text-secondary);
            font-size: 0.9rem;
            transition: var(--transition);
            padding: 0;
        }

        .footer .footer-socials a:hover {
            background: rgba(37, 99, 235, 0.15);
            color: var(--color-primary-light);
            transform: translateY(-2px);
        }

        @media (max-width: 768px) {
            .footer {
                padding: 32px 0 20px;
            }

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

            .footer .footer-brand {
                grid-column: 1 / -1;
            }

            .footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }

        ::-webkit-scrollbar-track {
            background: var(--color-bg-dark);
        }

        ::-webkit-scrollbar-thumb {
            background: var(--color-border);
            border-radius: 3px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: var(--color-text-muted);
        }

        /* ===== Focus ===== */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--color-primary-light);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* ===== Transition helper ===== */
        .fade-in {
            animation: fadeIn 0.6s ease forwards;
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(12px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }