/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a4a8b;
            --primary-light: #2563eb;
            --primary-dark: #0f2b55;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --accent-dark: #d97706;
            --bg: #f8fafc;
            --bg-card: #ffffff;
            --bg-dark: #0f172a;
            --bg-section-alt: #f1f5f9;
            --text: #1e293b;
            --text-light: #64748b;
            --text-white: #f8fafc;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.10);
            --shadow-hover: 0 12px 40px rgba(26, 74, 139, 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: 76px;
            --spacing-section: 5rem;
            --spacing-block: 3rem;
        }

        /* ===== 基础重置 ===== */
        *, *::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: 1rem;
            line-height: 1.6;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: inherit; text-decoration: none; transition: color var(--transition); }
        a:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
        button { font-family: inherit; cursor: pointer; border: none; background: none; }
        button:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
        input, textarea { font-family: inherit; font-size: 1rem; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--text); }
        h1 { font-size: 2.75rem; letter-spacing: -0.02em; }
        h2 { font-size: 2rem; letter-spacing: -0.01em; }
        h3 { font-size: 1.375rem; }
        h4 { font-size: 1.125rem; }
        p { margin-bottom: 1rem; }
        p:last-child { margin-bottom: 0; }

        /* ===== 容器 ===== */
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.5rem; }
        .container-narrow { max-width: 880px; margin: 0 auto; padding: 0 1.5rem; }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
            padding: 0.75rem 2rem; border-radius: var(--radius-sm);
            font-weight: 600; font-size: 1rem; line-height: 1.4;
            transition: all var(--transition); cursor: pointer; border: 2px solid transparent;
        }
        .btn-primary { background: var(--primary); color: #fff; border-color: var(--primary); }
        .btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(26, 74, 139, 0.25); }
        .btn-primary:active { transform: translateY(0); box-shadow: none; }
        .btn-accent { background: var(--accent); color: #1e293b; border-color: var(--accent); }
        .btn-accent:hover { background: var(--accent-dark); border-color: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(245, 158, 11, 0.3); }
        .btn-accent:active { transform: translateY(0); }
        .btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
        .btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(26, 74, 139, 0.15); }
        .btn-outline:active { transform: translateY(0); }
        .btn-lg { padding: 1rem 2.75rem; font-size: 1.125rem; border-radius: var(--radius); }
        .btn-sm { padding: 0.5rem 1.25rem; font-size: 0.875rem; }

        /* ===== 标签与徽章 ===== */
        .badge {
            display: inline-block; padding: 0.25rem 0.75rem; border-radius: 50px;
            font-size: 0.75rem; font-weight: 600; letter-spacing: 0.02em;
            background: var(--border); color: var(--text-light);
        }
        .badge-primary { background: rgba(26, 74, 139, 0.10); color: var(--primary); }
        .badge-accent { background: rgba(245, 158, 11, 0.12); color: var(--accent-dark); }
        .badge-success { background: rgba(34, 197, 94, 0.12); color: #16a34a; }
        .tag {
            display: inline-block; padding: 0.2rem 0.6rem; border-radius: var(--radius-sm);
            font-size: 0.75rem; font-weight: 500; background: var(--bg-section-alt); color: var(--text-light);
            border: 1px solid var(--border); transition: all var(--transition);
        }
        .tag:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            background: rgba(255, 255, 255, 0.92); backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            height: var(--header-height);
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled { box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06); }
        .header-inner {
            display: flex; align-items: center; justify-content: center;
            height: var(--header-height); position: relative;
        }
        .nav-left, .nav-right {
            display: flex; align-items: center; gap: 0.5rem;
            flex: 1;
        }
        .nav-left { justify-content: flex-start; }
        .nav-right { justify-content: flex-end; }
        .nav-center { flex-shrink: 0; padding: 0 1.5rem; }
        .logo {
            font-size: 1.5rem; font-weight: 800; letter-spacing: -0.03em;
            color: var(--primary); white-space: nowrap;
            transition: opacity var(--transition);
        }
        .logo:hover { opacity: 0.8; }
        .nav-item {
            display: inline-flex; align-items: center; padding: 0.4rem 1rem;
            font-size: 0.95rem; font-weight: 500; color: var(--text-light);
            border-radius: var(--radius-sm); transition: all var(--transition);
            position: relative;
        }
        .nav-item:hover { color: var(--primary); background: rgba(26, 74, 139, 0.06); }
        .nav-item.active { color: var(--primary); font-weight: 600; }
        .nav-item.active::after {
            content: ''; position: absolute; bottom: -2px; left: 1rem; right: 1rem;
            height: 2px; background: var(--primary); border-radius: 2px;
        }
        .menu-toggle {
            display: none; flex-direction: column; gap: 5px;
            padding: 8px; border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .menu-toggle:hover { background: rgba(26, 74, 139, 0.06); }
        .menu-toggle span {
            display: block; width: 24px; height: 2px; background: var(--text);
            border-radius: 2px; transition: all var(--transition);
        }
        .menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
        .menu-toggle.active span:nth-child(2) { opacity: 0; }
        .menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

        /* 移动端导航面板 */
        .mobile-nav {
            display: none; position: fixed; top: var(--header-height); left: 0; right: 0;
            background: rgba(255, 255, 255, 0.98); backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            padding: 1rem 1.5rem 1.5rem; box-shadow: var(--shadow-lg);
            z-index: 999; transform: translateY(-10px); opacity: 0;
            transition: all var(--transition); pointer-events: none;
        }
        .mobile-nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
        .mobile-nav .nav-item { display: block; padding: 0.75rem 1rem; font-size: 1.1rem; border-radius: var(--radius-sm); }
        .mobile-nav .nav-item.active { background: rgba(26, 74, 139, 0.08); }
        .mobile-nav .nav-item.active::after { display: none; }

        /* ===== 首屏 Hero ===== */
        .hero {
            position: relative; min-height: 92vh; display: flex; align-items: center;
            padding: calc(var(--header-height) + 2rem) 0 4rem;
            background: var(--bg-dark); overflow: hidden;
        }
        .hero-bg {
            position: absolute; inset: 0; z-index: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35; transform: scale(1.02);
            transition: transform 0.6s ease;
        }
        .hero:hover .hero-bg { transform: scale(1.04); }
        .hero-overlay {
            position: absolute; inset: 0; z-index: 1;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(26, 74, 139, 0.60) 100%);
        }
        .hero .container { position: relative; z-index: 2; }
        .hero-content { max-width: 720px; }
        .hero-badge {
            display: inline-flex; align-items: center; gap: 0.5rem;
            padding: 0.4rem 1.2rem; border-radius: 50px;
            background: rgba(255, 255, 255, 0.10); backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            font-size: 0.875rem; font-weight: 500; color: var(--text-white);
            margin-bottom: 1.5rem;
        }
        .hero h1 {
            color: var(--text-white); font-size: 3.25rem; line-height: 1.1;
            margin-bottom: 1.25rem; text-shadow: 0 2px 20px rgba(0,0,0,0.2);
        }
        .hero h1 span { color: var(--accent); }
        .hero p {
            color: rgba(248, 250, 252, 0.80); font-size: 1.2rem; line-height: 1.7;
            margin-bottom: 2.25rem; max-width: 600px;
        }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; }
        .hero-stats {
            display: flex; gap: 2.5rem; margin-top: 3rem;
            padding-top: 2rem; border-top: 1px solid rgba(255,255,255,0.10);
        }
        .hero-stat h3 { color: var(--text-white); font-size: 1.75rem; font-weight: 800; }
        .hero-stat p { color: rgba(248, 250, 252, 0.60); font-size: 0.875rem; margin-bottom: 0; }

        /* ===== 通用板块 ===== */
        .section { padding: var(--spacing-section) 0; }
        .section-alt { background: var(--bg-section-alt); }
        .section-dark { background: var(--bg-dark); color: var(--text-white); }
        .section-dark h2, .section-dark h3 { color: var(--text-white); }
        .section-header {
            text-align: center; margin-bottom: var(--spacing-block);
            max-width: 700px; margin-left: auto; margin-right: auto;
        }
        .section-header h2 { margin-bottom: 0.75rem; }
        .section-header p { color: var(--text-light); font-size: 1.125rem; }
        .section-dark .section-header p { color: rgba(248, 250, 252, 0.65); }
        .section-label {
            display: inline-block; padding: 0.3rem 1rem; border-radius: 50px;
            font-size: 0.8rem; font-weight: 600; letter-spacing: 0.04em;
            background: rgba(26, 74, 139, 0.08); color: var(--primary);
            margin-bottom: 1rem;
        }
        .section-dark .section-label { background: rgba(255,255,255,0.08); color: var(--accent-light); }

        /* ===== 卡片系统 ===== */
        .card {
            background: var(--bg-card); border-radius: var(--radius);
            box-shadow: var(--shadow); border: 1px solid var(--border);
            transition: all var(--transition); overflow: hidden;
        }
        .card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: rgba(26, 74, 139, 0.12); }
        .card-image { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; transition: transform 0.5s ease; }
        .card:hover .card-image { transform: scale(1.03); }
        .card-body { padding: 1.5rem; }
        .card-title { font-size: 1.125rem; font-weight: 600; margin-bottom: 0.5rem; line-height: 1.4; }
        .card-title a { color: var(--text); }
        .card-title a:hover { color: var(--primary); }
        .card-text { color: var(--text-light); font-size: 0.925rem; line-height: 1.6; }
        .card-meta { display: flex; align-items: center; gap: 1rem; margin-top: 1rem; font-size: 0.8rem; color: var(--text-light); }
        .card-footer { padding: 1rem 1.5rem; border-top: 1px solid var(--border); background: var(--bg-section-alt); }

        /* 特色卡片（图文组合） */
        .feature-card {
            display: flex; flex-direction: column; align-items: center; text-align: center;
            padding: 2rem 1.5rem; border-radius: var(--radius);
            background: var(--bg-card); border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: rgba(26, 74, 139, 0.12); }
        .feature-icon {
            width: 64px; height: 64px; border-radius: var(--radius);
            background: rgba(26, 74, 139, 0.08); display: flex; align-items: center; justify-content: center;
            font-size: 1.75rem; color: var(--primary); margin-bottom: 1.25rem;
            transition: background var(--transition);
        }
        .feature-card:hover .feature-icon { background: var(--primary); color: #fff; }
        .feature-card h3 { font-size: 1.125rem; margin-bottom: 0.5rem; }
        .feature-card p { color: var(--text-light); font-size: 0.925rem; }

        /* ===== 网格系统 ===== */
        .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
        .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
        .grid-2-1 { display: grid; grid-template-columns: 2fr 1fr; gap: 2rem; align-items: start; }

        /* ===== 分类入口卡片（大图） ===== */
        .cat-card {
            position: relative; border-radius: var(--radius); overflow: hidden;
            background: var(--bg-dark); aspect-ratio: 4 / 3;
            display: flex; align-items: flex-end; cursor: pointer;
            border: 1px solid var(--border); transition: all var(--transition);
        }
        .cat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .cat-card img {
            position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
            transition: transform 0.5s ease;
        }
        .cat-card:hover img { transform: scale(1.06); }
        .cat-card-overlay {
            position: relative; z-index: 2; padding: 1.5rem;
            background: linear-gradient(transparent, rgba(0,0,0,0.70));
            width: 100%;
        }
        .cat-card h3 { color: #fff; font-size: 1.25rem; font-weight: 700; margin-bottom: 0.25rem; }
        .cat-card p { color: rgba(255,255,255,0.75); font-size: 0.85rem; margin-bottom: 0; }

        /* ===== 数据/统计区块 ===== */
        .stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
        .stat-item {
            text-align: center; padding: 2rem 1rem;
            background: rgba(255,255,255,0.04); border-radius: var(--radius);
            border: 1px solid rgba(255,255,255,0.06);
            transition: all var(--transition);
        }
        .stat-item:hover { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.10); }
        .stat-number { font-size: 2.5rem; font-weight: 800; color: var(--accent); line-height: 1.2; margin-bottom: 0.25rem; }
        .stat-label { font-size: 0.9rem; color: rgba(248,250,252,0.65); }

        /* ===== 流程步骤 ===== */
        .steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; position: relative; }
        .step-card {
            text-align: center; padding: 2rem 1.5rem; position: relative;
            background: var(--bg-card); border-radius: var(--radius);
            border: 1px solid var(--border); transition: all var(--transition);
        }
        .step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .step-number {
            width: 48px; height: 48px; border-radius: 50%;
            background: var(--primary); color: #fff; font-size: 1.25rem; font-weight: 700;
            display: flex; align-items: center; justify-content: center;
            margin: 0 auto 1rem; transition: background var(--transition);
        }
        .step-card:hover .step-number { background: var(--accent); color: #1e293b; }
        .step-card h3 { font-size: 1.125rem; margin-bottom: 0.5rem; }
        .step-card p { color: var(--text-light); font-size: 0.925rem; }

        /* ===== 内容列表 ===== */
        .content-list { display: flex; flex-direction: column; gap: 1.25rem; }
        .content-item {
            display: flex; gap: 1.25rem; padding: 1.25rem;
            background: var(--bg-card); border-radius: var(--radius-sm);
            border: 1px solid var(--border); transition: all var(--transition);
        }
        .content-item:hover { box-shadow: var(--shadow); border-color: rgba(26, 74, 139, 0.12); }
        .content-item-thumb {
            width: 120px; height: 80px; border-radius: var(--radius-sm); object-fit: cover;
            flex-shrink: 0; background: var(--bg-section-alt);
        }
        .content-item-body { flex: 1; min-width: 0; }
        .content-item-body h4 { font-size: 1rem; font-weight: 600; margin-bottom: 0.3rem; }
        .content-item-body h4 a { color: var(--text); }
        .content-item-body h4 a:hover { color: var(--primary); }
        .content-item-body p { font-size: 0.875rem; color: var(--text-light); margin-bottom: 0.3rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .content-item-meta { display: flex; align-items: center; gap: 0.75rem; font-size: 0.75rem; color: var(--text-light); }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 0.75rem; }
        .faq-item {
            background: var(--bg-card); border-radius: var(--radius-sm);
            border: 1px solid var(--border); overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover { border-color: rgba(26, 74, 139, 0.15); }
        .faq-question {
            display: flex; align-items: center; justify-content: space-between;
            padding: 1.25rem 1.5rem; font-weight: 600; font-size: 1rem;
            cursor: pointer; transition: background var(--transition);
            gap: 1rem;
        }
        .faq-question:hover { background: rgba(26, 74, 139, 0.03); }
        .faq-question::after {
            content: '+'; font-size: 1.5rem; font-weight: 300; color: var(--text-light);
            transition: transform var(--transition); flex-shrink: 0;
        }
        .faq-item.open .faq-question::after { transform: rotate(45deg); color: var(--primary); }
        .faq-answer {
            max-height: 0; overflow: hidden; transition: all var(--transition);
            padding: 0 1.5rem; color: var(--text-light); font-size: 0.95rem; line-height: 1.7;
        }
        .faq-item.open .faq-answer { max-height: 300px; padding: 0 1.5rem 1.25rem; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            padding: var(--spacing-section) 0;
        }
        .cta-box {
            text-align: center; max-width: 680px; margin: 0 auto;
        }
        .cta-box h2 { color: #fff; font-size: 2.25rem; margin-bottom: 1rem; }
        .cta-box p { color: rgba(255,255,255,0.75); font-size: 1.1rem; margin-bottom: 2rem; }
        .cta-box .btn { font-size: 1.1rem; padding: 1rem 2.75rem; }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark); color: rgba(248,250,252,0.70);
            padding: 3rem 0 1.5rem;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2rem; margin-bottom: 2rem; }
        .footer-brand .logo { color: #fff; font-size: 1.35rem; display: inline-block; margin-bottom: 0.75rem; }
        .footer-brand p { font-size: 0.875rem; line-height: 1.7; max-width: 320px; }
        .footer-col h4 { color: #fff; font-size: 0.95rem; font-weight: 600; margin-bottom: 1rem; }
        .footer-col ul { display: flex; flex-direction: column; gap: 0.5rem; }
        .footer-col a { font-size: 0.875rem; color: rgba(248,250,252,0.60); transition: color var(--transition); }
        .footer-col a:hover { color: var(--accent); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 1.5rem; margin-top: 1.5rem;
            display: flex; align-items: center; justify-content: space-between;
            font-size: 0.8rem; color: rgba(248,250,252,0.40);
        }
        .footer-bottom a { color: rgba(248,250,252,0.50); }
        .footer-bottom a:hover { color: var(--accent); }

        /* ===== 空状态 ===== */
        .empty-state { text-align: center; padding: 2rem; color: var(--text-light); font-size: 0.95rem; }

        /* ===== 分隔线 ===== */
        .divider { width: 60px; height: 4px; background: var(--accent); border-radius: 4px; margin: 0.5rem auto 1.25rem; }
        .divider-left { margin: 0.5rem 0 1.25rem; }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            :root { --spacing-section: 3.5rem; }
            .grid-4 { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .hero h1 { font-size: 2.75rem; }
        }

        @media (max-width: 768px) {
            :root { --header-height: 64px; --spacing-section: 2.5rem; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.5rem; }
            .nav-left, .nav-right .nav-item { display: none; }
            .menu-toggle { display: flex; }
            .mobile-nav { display: block; }
            .hero { min-height: 80vh; padding-top: calc(var(--header-height) + 1rem); }
            .hero h1 { font-size: 2.25rem; }
            .hero p { font-size: 1rem; }
            .hero-stats { flex-wrap: wrap; gap: 1.5rem; }
            .hero-stat h3 { font-size: 1.5rem; }
            .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
            .grid-2-1 { grid-template-columns: 1fr; }
            .steps { grid-template-columns: 1fr; gap: 1rem; }
            .stat-grid { grid-template-columns: repeat(2, 1fr); }
            .content-item { flex-direction: column; }
            .content-item-thumb { width: 100%; height: 140px; }
            .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; gap: 0.5rem; text-align: center; }
            .cta-box h2 { font-size: 1.75rem; }
            .section-header { text-align: left; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 1rem; }
            .hero h1 { font-size: 1.75rem; }
            .hero-actions { flex-direction: column; }
            .hero-actions .btn { width: 100%; text-align: center; }
            .stat-grid { grid-template-columns: 1fr 1fr; gap: 0.75rem; }
            .stat-number { font-size: 1.75rem; }
            .cat-card { aspect-ratio: 3 / 2; }
        }

        /* ===== 工具类 ===== */
        .text-center { text-align: center; }
        .mt-1 { margin-top: 1rem; }
        .mt-2 { margin-top: 2rem; }
        .mb-1 { margin-bottom: 1rem; }
        .gap-sm { gap: 1rem; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* roulang page: article */
/* ===== Design Variables ===== */
    :root {
        --primary: #e53935;
        --primary-dark: #c62828;
        --primary-light: #ffebee;
        --secondary: #1a237e;
        --secondary-light: #e8eaf6;
        --accent: #ff8f00;
        --bg: #f5f5f5;
        --bg-white: #ffffff;
        --bg-dark: #1a1a2e;
        --text: #212121;
        --text-light: #616161;
        --text-white: #ffffff;
        --text-muted: #9e9e9e;
        --border: #e0e0e0;
        --border-light: #f0f0f0;
        --radius: 12px;
        --radius-sm: 8px;
        --radius-lg: 20px;
        --shadow: 0 4px 20px rgba(0,0,0,0.08);
        --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
        --shadow-hover: 0 8px 32px rgba(0,0,0,0.15);
        --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        --font: 'Segoe UI', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
        --max-width: 1200px;
        --header-h: 72px;
        --spacer: 80px;
    }

    /* ===== Reset & Base ===== */
    *, *::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;
        -moz-osx-font-smoothing: grayscale;
        padding-top: var(--header-h);
    }
    a { color: var(--primary); text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--primary-dark); }
    a:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; border-radius: 4px; }
    img { max-width: 100%; height: auto; display: block; }
    ul, ol { list-style: none; }
    button { cursor: pointer; font-family: inherit; border: none; background: none; }
    input, textarea { font-family: inherit; font-size: 1rem; }
    h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--text); font-weight: 700; }
    .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
    .container-narrow { max-width: 880px; margin: 0 auto; padding: 0 24px; }

    /* ===== Header & Navigation ===== */
    .site-header {
        position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
        background: var(--bg-white); border-bottom: 1px solid var(--border);
        box-shadow: 0 2px 12px rgba(0,0,0,0.04);
        height: var(--header-h);
        backdrop-filter: blur(12px);
        background: rgba(255,255,255,0.96);
    }
    .header-inner {
        display: flex; align-items: center; justify-content: space-between;
        height: var(--header-h); gap: 16px;
    }
    .nav-left { display: flex; align-items: center; gap: 8px; flex: 1; }
    .nav-right { display: flex; align-items: center; gap: 8px; flex: 1; justify-content: flex-end; }
    .nav-center { flex-shrink: 0; }
    .logo {
        font-size: 1.6rem; font-weight: 800; color: var(--primary);
        letter-spacing: -0.5px; text-decoration: none;
        background: linear-gradient(135deg, var(--primary), var(--accent));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }
    .logo:hover { opacity: 0.85; -webkit-text-fill-color: transparent; }
    .nav-item {
        padding: 8px 18px; border-radius: 40px; font-size: 0.95rem;
        font-weight: 500; color: var(--text); transition: var(--transition);
        white-space: nowrap;
    }
    .nav-item:hover { background: var(--primary-light); color: var(--primary); }
    .nav-item.active { background: var(--primary); color: var(--text-white); }
    .menu-toggle {
        display: none; flex-direction: column; gap: 5px;
        padding: 8px 12px; border-radius: 8px;
        background: var(--bg); transition: var(--transition);
    }
    .menu-toggle:hover { background: var(--border); }
    .menu-toggle span {
        display: block; width: 24px; height: 2.5px; background: var(--text);
        border-radius: 4px; transition: var(--transition);
    }

    /* ===== Breadcrumb ===== */
    .breadcrumb {
        padding: 20px 0 0; font-size: 0.9rem; color: var(--text-muted);
    }
    .breadcrumb a { color: var(--text-light); }
    .breadcrumb a:hover { color: var(--primary); }
    .breadcrumb span { color: var(--text-muted); margin: 0 6px; }

    /* ===== Article Hero ===== */
    .article-hero {
        position: relative; padding: 48px 0 40px;
        background: var(--bg-white);
        border-bottom: 1px solid var(--border-light);
    }
    .article-hero .container-narrow {
        text-align: center;
    }
    .article-category {
        display: inline-block; padding: 6px 20px; border-radius: 40px;
        background: var(--primary-light); color: var(--primary);
        font-size: 0.85rem; font-weight: 600; letter-spacing: 0.5px;
        margin-bottom: 16px;
    }
    .article-hero h1 {
        font-size: 2.4rem; font-weight: 800; line-height: 1.25;
        color: var(--text); margin-bottom: 16px;
        letter-spacing: -0.3px;
    }
    .article-meta {
        display: flex; align-items: center; justify-content: center;
        gap: 20px; flex-wrap: wrap; font-size: 0.9rem; color: var(--text-light);
    }
    .article-meta i { margin-right: 6px; color: var(--primary); }
    .article-meta span { display: inline-flex; align-items: center; }

    /* ===== Article Body ===== */
    .article-body-section {
        padding: 48px 0 60px; background: var(--bg-white);
    }
    .article-content {
        font-size: 1.05rem; line-height: 1.9; color: var(--text);
    }
    .article-content p { margin-bottom: 1.6em; }
    .article-content h2 {
        font-size: 1.6rem; font-weight: 700; margin: 2em 0 0.8em;
        color: var(--text); padding-bottom: 8px;
        border-bottom: 3px solid var(--primary-light);
    }
    .article-content h3 {
        font-size: 1.25rem; font-weight: 600; margin: 1.8em 0 0.6em;
        color: var(--secondary);
    }
    .article-content ul, .article-content ol {
        margin: 1em 0 1.6em; padding-left: 1.6em;
    }
    .article-content ul li { list-style: disc; margin-bottom: 0.5em; }
    .article-content ol li { list-style: decimal; margin-bottom: 0.5em; }
    .article-content blockquote {
        margin: 1.6em 0; padding: 16px 24px; border-left: 4px solid var(--primary);
        background: var(--primary-light); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        font-style: italic; color: var(--text-light);
    }
    .article-content img {
        border-radius: var(--radius); margin: 1.6em auto;
        box-shadow: var(--shadow);
    }
    .article-content a { color: var(--primary); font-weight: 500; text-decoration: underline; }
    .article-content a:hover { color: var(--primary-dark); }

    .article-footer-meta {
        margin-top: 48px; padding-top: 24px;
        border-top: 1px solid var(--border-light);
        display: flex; align-items: center; justify-content: space-between;
        flex-wrap: wrap; gap: 16px;
    }
    .article-tags {
        display: flex; flex-wrap: wrap; gap: 8px;
    }
    .article-tag {
        padding: 4px 16px; border-radius: 40px; background: var(--bg);
        color: var(--text-light); font-size: 0.85rem; font-weight: 500;
        transition: var(--transition);
    }
    .article-tag:hover { background: var(--primary-light); color: var(--primary); }
    .article-share {
        display: flex; align-items: center; gap: 10px; font-size: 0.9rem; color: var(--text-light);
    }
    .article-share a {
        display: inline-flex; align-items: center; justify-content: center;
        width: 36px; height: 36px; border-radius: 50%;
        background: var(--bg); color: var(--text-light);
        transition: var(--transition);
    }
    .article-share a:hover { background: var(--primary); color: var(--text-white); }

    /* ===== Not Found ===== */
    .not-found-box {
        text-align: center; padding: 80px 24px; background: var(--bg-white);
        border-radius: var(--radius); box-shadow: var(--shadow);
    }
    .not-found-box i { font-size: 4rem; color: var(--text-muted); margin-bottom: 20px; }
    .not-found-box h2 { font-size: 1.8rem; margin-bottom: 12px; }
    .not-found-box p { color: var(--text-light); margin-bottom: 24px; }
    .btn-back { display: inline-block; padding: 12px 32px; border-radius: 40px; background: var(--primary); color: var(--text-white); font-weight: 600; transition: var(--transition); }
    .btn-back:hover { background: var(--primary-dark); color: var(--text-white); transform: translateY(-2px); }

    /* ===== Related Articles ===== */
    .related-section {
        padding: 60px 0; background: var(--bg);
    }
    .related-section h2 {
        font-size: 1.6rem; font-weight: 700; margin-bottom: 32px;
        text-align: center; color: var(--text);
    }
    .related-grid {
        display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
    }
    .related-card {
        background: var(--bg-white); border-radius: var(--radius);
        overflow: hidden; box-shadow: var(--shadow);
        transition: var(--transition);
    }
    .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
    .related-card img { width: 100%; height: 180px; object-fit: cover; }
    .related-card-body { padding: 20px; }
    .related-card-body h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 8px; }
    .related-card-body h3 a { color: var(--text); }
    .related-card-body h3 a:hover { color: var(--primary); }
    .related-card-body .meta { font-size: 0.85rem; color: var(--text-muted); }

    /* ===== CTA Section ===== */
    .article-cta {
        padding: 60px 0; background: linear-gradient(135deg, var(--secondary), #283593);
        text-align: center; color: var(--text-white);
    }
    .article-cta h2 { font-size: 1.8rem; font-weight: 700; color: var(--text-white); margin-bottom: 12px; }
    .article-cta p { font-size: 1.05rem; opacity: 0.85; margin-bottom: 28px; max-width: 600px; margin-left: auto; margin-right: auto; }
    .article-cta .btn-cta {
        display: inline-block; padding: 14px 40px; border-radius: 40px;
        background: var(--accent); color: var(--text-white); font-weight: 700;
        font-size: 1.05rem; transition: var(--transition);
    }
    .article-cta .btn-cta:hover { background: #ff6f00; transform: translateY(-3px); box-shadow: 0 8px 30px rgba(255,143,0,0.4); color: var(--text-white); }

    /* ===== Footer ===== */
    .site-footer {
        background: var(--bg-dark); color: rgba(255,255,255,0.8);
        padding: 60px 0 0;
    }
    .footer-grid {
        display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px;
        padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .footer-brand .logo { font-size: 1.5rem; display: inline-block; margin-bottom: 12px; }
    .footer-brand p { font-size: 0.9rem; line-height: 1.7; opacity: 0.7; max-width: 320px; }
    .footer-col h4 { color: var(--text-white); font-size: 1rem; font-weight: 600; margin-bottom: 16px; }
    .footer-col ul li { margin-bottom: 10px; }
    .footer-col ul li a { color: rgba(255,255,255,0.65); font-size: 0.9rem; transition: var(--transition); }
    .footer-col ul li a:hover { color: var(--accent); padding-left: 4px; }
    .footer-bottom {
        display: flex; justify-content: space-between; align-items: center;
        flex-wrap: wrap; gap: 12px; padding: 20px 0;
        font-size: 0.85rem; opacity: 0.6; color: rgba(255,255,255,0.7);
    }
    .footer-bottom a { color: var(--accent); }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
        .related-grid { grid-template-columns: repeat(2, 1fr); }
        .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
    }

    @media (max-width: 768px) {
        :root { --header-h: 64px; --spacer: 48px; }
        .nav-left .nav-item { display: none; }
        .nav-right .nav-item { display: none; }
        .menu-toggle { display: flex; }
        .article-hero h1 { font-size: 1.6rem; }
        .article-hero { padding: 32px 0 28px; }
        .article-content { font-size: 1rem; }
        .article-content h2 { font-size: 1.3rem; }
        .article-body-section { padding: 32px 0 40px; }
        .related-grid { grid-template-columns: 1fr; }
        .footer-grid { grid-template-columns: 1fr; gap: 24px; }
        .footer-bottom { flex-direction: column; text-align: center; }
        .article-meta { gap: 12px; font-size: 0.85rem; }
        .article-cta h2 { font-size: 1.4rem; }
    }

    @media (max-width: 520px) {
        .container { padding: 0 16px; }
        .article-hero h1 { font-size: 1.35rem; }
        .article-category { font-size: 0.8rem; padding: 4px 14px; }
        .article-content { font-size: 0.95rem; }
        .article-footer-meta { flex-direction: column; align-items: flex-start; }
        .related-card img { height: 140px; }
        .article-cta .btn-cta { width: 100%; text-align: center; }
    }

    /* Mobile dropdown menu */
    .mobile-dropdown {
        display: none; position: fixed; top: var(--header-h); left: 0; width: 100%;
        background: var(--bg-white); box-shadow: 0 8px 32px rgba(0,0,0,0.12);
        padding: 20px 24px; z-index: 999; border-top: 1px solid var(--border);
    }
    .mobile-dropdown.open { display: block; }
    .mobile-dropdown a {
        display: block; padding: 12px 16px; border-radius: var(--radius-sm);
        font-size: 1rem; font-weight: 500; color: var(--text);
        transition: var(--transition);
    }
    .mobile-dropdown a:hover { background: var(--primary-light); color: var(--primary); }
    .mobile-dropdown a.active { background: var(--primary); color: var(--text-white); }

/* roulang page: category1 */
/* ===== CSS Design Variables ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c1121f;
            --primary-light: #ff6b6b;
            --secondary: #1d3557;
            --secondary-light: #2a4a7f;
            --accent: #f4a261;
            --accent-light: #ffb703;
            --bg-body: #f8f9fa;
            --bg-white: #ffffff;
            --bg-dark: #0d1b2a;
            --bg-card: #ffffff;
            --bg-section-alt: #f0f2f5;
            --text-dark: #1a1a2e;
            --text-main: #2d3436;
            --text-muted: #636e72;
            --text-light: #b2bec3;
            --text-white: #f8f9fa;
            --border-color: #e0e4e8;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 6px 24px rgba(0,0,0,0.10);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.14);
            --shadow-card: 0 4px 16px rgba(0,0,0,0.07);
            --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-body: 'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
            --max-width: 1200px;
            --header-h: 72px;
            --space-section: 80px;
            --space-section-mobile: 48px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-body);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--header-h);
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 2px; }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { list-style: none; }
        button { cursor: pointer; font-family: inherit; border: none; background: none; }
        input, textarea { font-family: inherit; }
        h1, h2, h3, h4, h5, h6 { color: var(--text-dark); line-height: 1.3; font-weight: 700; }
        h1 { font-size: clamp(2rem, 4.8vw, 3.2rem); }
        h2 { font-size: clamp(1.6rem, 3.2vw, 2.4rem); margin-bottom: 0.5em; }
        h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }
        p { margin-bottom: 1em; }

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

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            background: rgba(255,255,255,0.95);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(0,0,0,0.06);
            height: var(--header-h);
            box-shadow: 0 1px 12px rgba(0,0,0,0.04);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: center;
            height: var(--header-h);
            position: relative;
        }
        .nav-left {
            display: flex;
            align-items: center;
            gap: 8px;
            position: absolute;
            left: 0;
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 8px;
            position: absolute;
            right: 0;
        }
        .nav-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .logo {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 1px;
            transition: color var(--transition);
            text-decoration: none !important;
        }
        .logo:hover { color: var(--primary-dark); }
        .nav-item {
            padding: 8px 18px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-main);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            text-decoration: none !important;
            position: relative;
        }
        .nav-item:hover {
            color: var(--primary);
            background: rgba(230,57,70,0.06);
        }
        .nav-item.active {
            color: var(--primary);
            background: rgba(230,57,70,0.10);
            font-weight: 600;
        }
        .nav-item.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 10px;
            margin-left: 8px;
            background: transparent;
            border: none;
        }
        .menu-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-dark);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .menu-toggle:hover span { background: var(--primary); }

        /* Mobile Nav */
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--header-h);
            left: 0; right: 0;
            background: rgba(255,255,255,0.98);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
            padding: 16px 24px;
            z-index: 999;
            flex-direction: column;
            gap: 6px;
        }
        .mobile-nav.open { display: flex; }
        .mobile-nav .nav-item {
            padding: 12px 16px;
            font-size: 1.05rem;
            border-radius: var(--radius-sm);
        }
        .mobile-nav .nav-item.active { background: rgba(230,57,70,0.08); }

        @media (max-width: 768px) {
            .nav-left .nav-item { display: none; }
            .nav-right .nav-item { display: none; }
            .menu-toggle { display: flex; }
            .nav-left { position: static; }
            .nav-right { position: static; }
            .header-inner { justify-content: space-between; }
        }

        /* ===== Page Banner ===== */
        .page-banner {
            position: relative;
            padding: 80px 0 64px;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            text-align: center;
            color: var(--text-white);
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13,27,42,0.85) 0%, rgba(230,57,70,0.55) 100%);
            z-index: 1;
        }
        .page-banner .container { position: relative; z-index: 2; }
        .page-banner h1 {
            color: #fff;
            font-size: clamp(2rem, 4vw, 3rem);
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: 1px;
        }
        .page-banner p {
            color: rgba(255,255,255,0.85);
            font-size: 1.1rem;
            max-width: 680px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .page-banner .breadcrumb {
            display: flex;
            justify-content: center;
            gap: 8px;
            margin-bottom: 20px;
            font-size: 0.92rem;
            color: rgba(255,255,255,0.7);
        }
        .page-banner .breadcrumb a { color: rgba(255,255,255,0.85); }
        .page-banner .breadcrumb a:hover { color: #fff; }
        .page-banner .breadcrumb span { color: rgba(255,255,255,0.5); }

        @media (max-width: 768px) {
            .page-banner { padding: 56px 0 40px; }
            .page-banner p { font-size: 1rem; }
        }

        /* ===== Section Common ===== */
        .section {
            padding: var(--space-section) 0;
        }
        .section-alt {
            background: var(--bg-section-alt);
        }
        .section-white {
            background: var(--bg-white);
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            position: relative;
            display: inline-block;
        }
        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 2px;
            margin: 12px auto 0;
        }
        .section-title p {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 12px auto 0;
        }

        @media (max-width: 768px) {
            .section { padding: var(--space-section-mobile) 0; }
            .section-title { margin-bottom: 32px; }
        }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 28px;
        }
        .card-grid-2 {
            grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
        }
        .card-grid-3 {
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        }

        /* ===== Card ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition);
            border: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .card-image {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
            transition: transform 0.5s ease;
        }
        .card:hover .card-image {
            transform: scale(1.03);
        }
        .card-body {
            padding: 20px 22px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-tag {
            display: inline-block;
            padding: 3px 12px;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--primary);
            background: rgba(230,57,70,0.08);
            border-radius: 20px;
            margin-bottom: 10px;
            align-self: flex-start;
        }
        .card h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .card h3 a {
            color: var(--text-dark);
            text-decoration: none;
        }
        .card h3 a:hover { color: var(--primary); }
        .card p {
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.6;
            margin-bottom: 0;
            flex: 1;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.82rem;
            color: var(--text-light);
            margin-top: 14px;
            padding-top: 12px;
            border-top: 1px solid var(--border-color);
        }
        .card-meta span { display: flex; align-items: center; gap: 4px; }
        .card-btn {
            margin-top: 16px;
            align-self: flex-start;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 26px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: 50px;
            transition: all var(--transition);
            text-decoration: none !important;
            border: none;
            line-height: 1.4;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff !important;
            box-shadow: 0 4px 14px rgba(230,57,70,0.30);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 6px 24px rgba(230,57,70,0.40);
            transform: translateY(-2px);
            color: #fff !important;
        }
        .btn-secondary {
            background: var(--secondary);
            color: #fff !important;
            box-shadow: 0 4px 14px rgba(29,53,87,0.25);
        }
        .btn-secondary:hover {
            background: var(--secondary-light);
            box-shadow: 0 6px 24px rgba(29,53,87,0.35);
            transform: translateY(-2px);
            color: #fff !important;
        }
        .btn-outline {
            background: transparent;
            color: var(--primary) !important;
            border: 2px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff !important;
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 6px 18px;
            font-size: 0.85rem;
        }
        .btn-lg {
            padding: 14px 38px;
            font-size: 1.1rem;
        }

        /* ===== Tags ===== */
        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin: 16px 0;
        }
        .tag {
            display: inline-block;
            padding: 5px 16px;
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--text-muted);
            background: var(--bg-body);
            border-radius: 50px;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .tag:hover {
            color: var(--primary);
            border-color: var(--primary);
            background: rgba(230,57,70,0.04);
        }

        /* ===== Feature Cards (图文区块) ===== */
        .feature-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .feature-image img {
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            width: 100%;
            height: auto;
        }
        .feature-content h3 {
            font-size: 1.5rem;
            margin-bottom: 16px;
        }
        .feature-content p {
            color: var(--text-muted);
            margin-bottom: 12px;
        }
        .feature-content .btn { margin-top: 8px; }

        @media (max-width: 768px) {
            .feature-row { grid-template-columns: 1fr; gap: 28px; }
            .feature-image { order: 1; }
            .feature-content { order: 2; }
            .feature-row.reverse .feature-image { order: 2; }
            .feature-row.reverse .feature-content { order: 1; }
        }

        /* ===== Stats / 数据模块 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 24px;
            text-align: center;
        }
        .stat-item {
            background: var(--bg-white);
            padding: 28px 16px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .stat-item .number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-item .label {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-top: 6px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-color);
            padding: 18px 0;
        }
        .faq-item:first-child { border-top: 1px solid var(--border-color); }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            padding: 4px 0;
            transition: color var(--transition);
        }
        .faq-question:hover { color: var(--primary); }
        .faq-question .icon {
            font-size: 1.4rem;
            transition: transform var(--transition);
            color: var(--text-muted);
        }
        .faq-item.open .faq-question .icon { transform: rotate(45deg); color: var(--primary); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-top: 12px;
        }

        /* ===== CTA ===== */
        .cta-block {
            text-align: center;
            padding: 60px 0;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            border-radius: var(--radius-lg);
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13,27,42,0.88) 0%, rgba(230,57,70,0.60) 100%);
            z-index: 1;
        }
        .cta-block .container { position: relative; z-index: 2; }
        .cta-block h2 {
            color: #fff;
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            margin-bottom: 12px;
        }
        .cta-block p {
            color: rgba(255,255,255,0.85);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-block .btn {
            font-size: 1.05rem;
            padding: 14px 40px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.75);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .logo {
            font-size: 1.5rem;
            display: inline-block;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.6);
            max-width: 300px;
            line-height: 1.7;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a {
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
            transition: color var(--transition);
        }
        .footer-col ul li a:hover { color: var(--primary-light); }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.45);
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-bottom a { color: rgba(255,255,255,0.6); }
        .footer-bottom a:hover { color: var(--primary-light); }
        .footer-bottom span { display: inline-flex; align-items: center; gap: 4px; }

        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
            .footer-brand { grid-column: 1 / -1; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; }
        }

        /* ===== Category Intro ===== */
        .category-intro {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 32px 36px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            margin-bottom: 40px;
        }
        .category-intro h3 {
            font-size: 1.3rem;
            margin-bottom: 12px;
            color: var(--primary);
        }
        .category-intro p {
            color: var(--text-muted);
            margin-bottom: 0;
            font-size: 0.98rem;
        }

        /* ===== Subcategory Tabs ===== */
        .sub-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 32px;
        }
        .sub-tab {
            padding: 8px 22px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-muted);
            background: var(--bg-body);
            border-radius: 50px;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            cursor: pointer;
        }
        .sub-tab:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .sub-tab.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* ===== Pagination ===== */
        .pagination {
            display: flex;
            justify-content: center;
            gap: 8px;
            margin-top: 40px;
        }
        .page-link {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: var(--radius-sm);
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            color: var(--text-main);
            font-weight: 500;
            transition: all var(--transition);
        }
        .page-link:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .page-link.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .page-link.disabled {
            opacity: 0.4;
            pointer-events: none;
        }

        /* ===== Responsive Helpers ===== */
        @media (max-width: 1024px) {
            .card-grid-2 { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
        }
        @media (max-width: 520px) {
            .card-grid { grid-template-columns: 1fr; }
            .card-grid-2 { grid-template-columns: 1fr; }
            .card-grid-3 { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: 1fr 1fr; }
            .sub-tabs { flex-wrap: wrap; }
        }

        /* ===== Focus / Accessibility ===== */
        :focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .skip-link {
            position: absolute;
            top: -100%;
            left: 8px;
            background: var(--primary);
            color: #fff;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            z-index: 10000;
        }
        .skip-link:focus { top: 8px; }

        /* ===== Skeleton / Loading ===== */
        .skeleton {
            background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
            background-size: 200% 100%;
            animation: shimmer 1.5s infinite;
            border-radius: var(--radius-sm);
        }
        @keyframes shimmer {
            0% { background-position: -200% 0; }
            100% { background-position: 200% 0; }
        }