/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a2940;
            --primary-light: #2c4060;
            --secondary: #c9a84c;
            --secondary-light: #e8c76a;
            --accent: #d4a84b;
            --bg: #faf8f5;
            --bg-alt: #f3efe9;
            --bg-dark: #0f1a2e;
            --text: #1e1e1e;
            --text-light: #7a7a7a;
            --text-inverse: #faf8f5;
            --border: #e5e0d8;
            --border-light: #f0ece6;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 24px rgba(26,41,64,0.08);
            --shadow-lg: 0 12px 48px rgba(26,41,64,0.12);
            --shadow-hover: 0 8px 32px rgba(26,41,64,0.15);
            --transition: 0.25s ease;
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --container: 1200px;
            --nav-height: 72px;
        }

        /* ===== 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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--secondary); }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        button { cursor: pointer; border: none; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--primary); }
        h1 { font-size: 2.8rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.4rem; }
        p { margin-bottom: 1rem; color: var(--text); }
        .container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-alt); }
        .section-dark { background: var(--bg-dark); color: var(--text-inverse); }
        .section-dark h2, .section-dark h3 { color: var(--text-inverse); }
        .section-dark p { color: rgba(250,248,245,0.8); }
        .text-center { text-align: center; }
        .text-gold { color: var(--secondary); }

        /* ===== 导航 ===== */
        header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            height: var(--nav-height);
            background: rgba(250,248,245,0.95);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            transition: box-shadow var(--transition);
        }
        header.scrolled { box-shadow: var(--shadow); }
        .nav-inner {
            display: flex; align-items: center; justify-content: space-between;
            height: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px;
        }
        .nav-logo {
            display: flex; align-items: center; gap: 10px;
            font-size: 1.5rem; font-weight: 700; color: var(--primary);
            letter-spacing: -0.3px;
        }
        .nav-logo i { color: var(--secondary); font-size: 1.4rem; }
        .nav-logo span { background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
        .nav-links { display: flex; align-items: center; gap: 8px; }
        .nav-links a {
            padding: 8px 18px; border-radius: var(--radius-sm);
            font-weight: 500; font-size: 0.95rem; color: var(--text-light);
            transition: all var(--transition);
        }
        .nav-links a:hover { color: var(--primary); background: rgba(26,41,64,0.06); }
        .nav-links a.active { color: var(--primary); background: rgba(201,168,76,0.15); font-weight: 600; }
        .nav-actions { display: flex; align-items: center; gap: 12px; }
        .nav-search {
            display: flex; align-items: center; gap: 8px;
            background: var(--bg-alt); border: 1px solid var(--border);
            border-radius: 24px; padding: 6px 16px; transition: all var(--transition);
        }
        .nav-search:focus-within { border-color: var(--secondary); box-shadow: 0 0 0 3px rgba(201,168,76,0.15); }
        .nav-search input { background: none; border: none; outline: none; width: 140px; padding: 4px 0; color: var(--text); }
        .nav-search input::placeholder { color: var(--text-light); }
        .nav-search i { color: var(--text-light); font-size: 0.9rem; }
        .nav-btn {
            padding: 8px 22px; border-radius: 24px; font-weight: 600; font-size: 0.9rem;
            transition: all var(--transition);
        }
        .nav-btn-primary { background: var(--secondary); color: var(--primary); }
        .nav-btn-primary:hover { background: var(--secondary-light); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(201,168,76,0.3); }
        .nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; cursor: pointer; }
        .nav-toggle span { width: 24px; height: 2px; background: var(--primary); border-radius: 2px; transition: all var(--transition); }

        /* ===== Hero ===== */
        .hero {
            padding: 140px 0 80px; margin-top: var(--nav-height);
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1a2a4a 60%, #2a3a5a 100%);
            position: relative; overflow: hidden;
        }
        .hero::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.2; mix-blend-mode: overlay;
        }
        .hero .container { position: relative; z-index: 2; }
        .hero-content { max-width: 700px; }
        .hero-badge {
            display: inline-flex; align-items: center; gap: 8px;
            background: rgba(201,168,76,0.15); border: 1px solid rgba(201,168,76,0.3);
            padding: 6px 18px; border-radius: 24px; font-size: 0.85rem; color: var(--secondary-light); margin-bottom: 20px;
        }
        .hero h1 { font-size: 3.2rem; color: var(--text-inverse); margin-bottom: 20px; letter-spacing: -0.5px; }
        .hero h1 span { color: var(--secondary-light); }
        .hero p { font-size: 1.15rem; color: rgba(250,248,245,0.75); margin-bottom: 32px; max-width: 560px; }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero-btn {
            padding: 14px 34px; border-radius: 28px; font-weight: 600; font-size: 1rem;
            transition: all var(--transition); display: inline-flex; align-items: center; gap: 10px;
        }
        .hero-btn-primary { background: var(--secondary); color: var(--primary); }
        .hero-btn-primary:hover { background: var(--secondary-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(201,168,76,0.3); }
        .hero-btn-outline { border: 2px solid rgba(250,248,245,0.3); color: var(--text-inverse); }
        .hero-btn-outline:hover { border-color: var(--secondary); color: var(--secondary-light); transform: translateY(-2px); }
        .hero-stats { display: flex; gap: 40px; margin-top: 48px; padding-top: 32px; border-top: 1px solid rgba(250,248,245,0.1); }
        .hero-stat h3 { font-size: 2rem; color: var(--secondary-light); }
        .hero-stat p { font-size: 0.9rem; color: rgba(250,248,245,0.5); margin: 0; }

        /* ===== 板块通用 ===== */
        .section-header { margin-bottom: 48px; }
        .section-header h2 { margin-bottom: 12px; }
        .section-header p { font-size: 1.05rem; color: var(--text-light); max-width: 560px; margin: 0 auto; }
        .section-header.text-center p { margin-left: auto; margin-right: auto; }

        /* ===== 卡片 ===== */
        .card {
            background: #fff; border-radius: var(--radius); overflow: hidden;
            box-shadow: var(--shadow); transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
        .card-img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
        .card-body { padding: 24px; }
        .card-body h3 { font-size: 1.15rem; margin-bottom: 8px; }
        .card-body p { font-size: 0.95rem; color: var(--text-light); margin: 0 0 12px; }
        .card-meta { display: flex; align-items: center; gap: 16px; font-size: 0.85rem; color: var(--text-light); }
        .card-meta i { margin-right: 4px; }
        .card-tag {
            display: inline-block; padding: 3px 12px; border-radius: 12px;
            background: rgba(201,168,76,0.12); color: var(--secondary); font-size: 0.8rem; font-weight: 500;
        }
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

        /* ===== 特色板块 ===== */
        .features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
        .feature-card {
            background: #fff; border-radius: var(--radius); padding: 32px 28px;
            border: 1px solid var(--border-light); transition: all var(--transition);
        }
        .feature-card:hover { border-color: var(--secondary); box-shadow: var(--shadow-hover); transform: translateY(-3px); }
        .feature-icon {
            width: 56px; height: 56px; border-radius: 14px;
            background: rgba(201,168,76,0.12); display: flex; align-items: center; justify-content: center;
            margin-bottom: 20px; font-size: 1.4rem; color: var(--secondary);
        }
        .feature-card h3 { font-size: 1.1rem; margin-bottom: 10px; }
        .feature-card p { font-size: 0.95rem; color: var(--text-light); margin: 0; }

        /* ===== 分类入口 ===== */
        .cat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
        .cat-card {
            background: #fff; border-radius: var(--radius); padding: 28px 20px; text-align: center;
            border: 1px solid var(--border-light); transition: all var(--transition);
        }
        .cat-card:hover { border-color: var(--secondary); box-shadow: var(--shadow-hover); transform: translateY(-3px); }
        .cat-card i { font-size: 2rem; color: var(--secondary); margin-bottom: 12px; }
        .cat-card h4 { font-size: 1rem; margin-bottom: 6px; }
        .cat-card p { font-size: 0.85rem; color: var(--text-light); margin: 0; }

        /* ===== 数据板块 ===== */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .stat-card {
            text-align: center; padding: 36px 20px;
            background: rgba(255,255,255,0.05); border-radius: var(--radius);
            border: 1px solid rgba(255,255,255,0.08);
        }
        .stat-card .num { font-size: 2.6rem; font-weight: 700; color: var(--secondary-light); line-height: 1.2; }
        .stat-card .label { font-size: 0.9rem; color: rgba(250,248,245,0.6); margin-top: 8px; }

        /* ===== 流程 ===== */
        .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .step { text-align: center; position: relative; }
        .step::after {
            content: '→'; position: absolute; right: -16px; top: 28px;
            font-size: 1.6rem; color: var(--secondary); opacity: 0.5;
        }
        .step:last-child::after { display: none; }
        .step-num {
            width: 56px; height: 56px; border-radius: 50%;
            background: var(--secondary); color: var(--primary);
            display: flex; align-items: center; justify-content: center;
            font-size: 1.4rem; font-weight: 700; margin: 0 auto 16px;
        }
        .step h4 { font-size: 1.05rem; margin-bottom: 8px; }
        .step p { font-size: 0.9rem; color: var(--text-light); margin: 0; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: #fff; border-radius: var(--radius-sm);
            border: 1px solid var(--border-light); overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover { border-color: var(--border); }
        .faq-q {
            padding: 18px 24px; display: flex; justify-content: space-between; align-items: center;
            font-weight: 600; cursor: pointer; color: var(--primary); font-size: 1rem;
        }
        .faq-q i { color: var(--secondary); transition: transform var(--transition); font-size: 0.9rem; }
        .faq-item.open .faq-q i { transform: rotate(180deg); }
        .faq-a {
            padding: 0 24px 18px; font-size: 0.95rem; color: var(--text-light);
            display: none; line-height: 1.7;
        }
        .faq-item.open .faq-a { display: block; }

        /* ===== CTA ===== */
        .cta-box {
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1a2a4a 100%);
            border-radius: var(--radius-lg); padding: 60px 48px; text-align: center;
            position: relative; overflow: hidden;
        }
        .cta-box::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.08; mix-blend-mode: overlay;
        }
        .cta-box h2 { color: var(--text-inverse); font-size: 2rem; margin-bottom: 12px; position: relative; }
        .cta-box p { color: rgba(250,248,245,0.7); max-width: 500px; margin: 0 auto 28px; position: relative; }
        .cta-box .hero-btn { position: relative; }

        /* ===== 页脚 ===== */
        footer {
            background: var(--bg-dark); color: rgba(250,248,245,0.7); padding: 48px 0 24px;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 32px; }
        .footer-brand .nav-logo { margin-bottom: 12px; }
        .footer-brand .nav-logo span { -webkit-text-fill-color: var(--text-inverse); }
        .footer-brand p { font-size: 0.9rem; color: rgba(250,248,245,0.5); max-width: 280px; }
        .footer-col h4 { color: var(--text-inverse); font-size: 0.95rem; margin-bottom: 16px; }
        .footer-col a { display: block; color: rgba(250,248,245,0.5); font-size: 0.9rem; padding: 4px 0; transition: color var(--transition); }
        .footer-col a:hover { color: var(--secondary-light); }
        .footer-bottom { border-top: 1px solid rgba(250,248,245,0.08); padding-top: 20px; text-align: center; font-size: 0.85rem; color: rgba(250,248,245,0.35); }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .grid-3, .features-grid, .steps { grid-template-columns: repeat(2, 1fr); }
            .grid-4, .cat-grid, .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .hero h1 { font-size: 2.6rem; }
            .step::after { display: none; }
        }
        @media (max-width: 768px) {
            .nav-links { display: none; }
            .nav-actions .nav-search { display: none; }
            .nav-toggle { display: flex; }
            .nav-links.mobile-open {
                display: flex; flex-direction: column; position: absolute; top: var(--nav-height); left: 0; right: 0;
                background: rgba(250,248,245,0.98); backdrop-filter: blur(16px);
                padding: 16px 24px; border-bottom: 1px solid var(--border); gap: 4px;
            }
            .nav-links.mobile-open a { padding: 12px 16px; width: 100%; }
            .hero { padding: 120px 0 60px; }
            .hero h1 { font-size: 2rem; }
            .hero-stats { flex-wrap: wrap; gap: 20px; }
            .hero-stat { flex: 1; min-width: 100px; }
            .section { padding: 48px 0; }
            .grid-3, .grid-4, .features-grid, .cat-grid, .stats-grid, .steps { grid-template-columns: 1fr; gap: 20px; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .cta-box { padding: 36px 24px; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.6rem; }
            .hero-actions { flex-direction: column; }
            .hero-btn { width: 100%; justify-content: center; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero h1 { font-size: 1.7rem; }
            .stat-card .num { font-size: 2rem; }
            .nav-logo { font-size: 1.2rem; }
            .nav-logo i { font-size: 1.1rem; }
        }

        /* ===== 工具 ===== */
        .mt-1 { margin-top: 8px; }
        .mt-2 { margin-top: 16px; }
        .mt-3 { margin-top: 24px; }
        .mb-2 { margin-bottom: 16px; }
        .gap-2 { gap: 12px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .badge {
            display: inline-block; padding: 4px 14px; border-radius: 12px;
            font-size: 0.8rem; font-weight: 500;
        }
        .badge-gold { background: rgba(201,168,76,0.15); color: var(--secondary); }
        .badge-primary { background: rgba(26,41,64,0.08); color: var(--primary); }

        /* ===== 最新资讯列表 ===== */
        .news-list { display: flex; flex-direction: column; gap: 16px; }
        .news-item {
            display: flex; align-items: center; gap: 20px;
            background: #fff; border-radius: var(--radius-sm); padding: 16px 20px;
            border: 1px solid var(--border-light); transition: all var(--transition);
        }
        .news-item:hover { border-color: var(--secondary); box-shadow: var(--shadow); }
        .news-item .thumb {
            width: 80px; height: 60px; border-radius: 8px; object-fit: cover; flex-shrink: 0;
            background: var(--bg-alt);
        }
        .news-item .info { flex: 1; min-width: 0; }
        .news-item .info h4 { font-size: 1rem; margin-bottom: 4px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
        .news-item .info p { font-size: 0.88rem; color: var(--text-light); margin: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
        .news-item .meta { font-size: 0.8rem; color: var(--text-light); flex-shrink: 0; display: flex; align-items: center; gap: 12px; }
        .empty-news { text-align: center; padding: 48px 24px; color: var(--text-light); font-size: 1rem; background: #fff; border-radius: var(--radius); border: 1px dashed var(--border); }

        /* ===== 文章页专用 ===== */
        .article-banner {
            padding: 120px 0 60px; margin-top: var(--nav-height);
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1a2a4a 80%);
            position: relative; overflow: hidden;
        }
        .article-banner::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: 0.12; mix-blend-mode: overlay;
        }
        .article-banner .container { position: relative; z-index: 2; }
        .article-banner .cat-tag { display: inline-block; padding: 4px 16px; border-radius: 16px; background: rgba(201,168,76,0.15); color: var(--secondary-light); font-size: 0.85rem; margin-bottom: 12px; }
        .article-banner h1 { color: var(--text-inverse); font-size: 2.4rem; max-width: 720px; }
        .article-banner .meta { color: rgba(250,248,245,0.5); font-size: 0.9rem; margin-top: 16px; display: flex; gap: 24px; }
        .article-body { max-width: 780px; margin: 0 auto; padding: 48px 0; }
        .article-body p { font-size: 1.05rem; line-height: 1.9; margin-bottom: 1.2rem; }
        .article-body h2, .article-body h3 { margin-top: 32px; margin-bottom: 12px; }
        .article-body img { border-radius: var(--radius-sm); margin: 24px 0; }
        .article-nav { display: flex; justify-content: space-between; padding: 24px 0; border-top: 1px solid var(--border); margin-top: 32px; }
        .article-nav a { display: flex; align-items: center; gap: 8px; font-weight: 500; }
        .not-found { text-align: center; padding: 80px 24px; }
        .not-found h2 { font-size: 2rem; margin-bottom: 16px; }
        .not-found p { color: var(--text-light); }
        .not-found .hero-btn { display: inline-flex; margin-top: 24px; }

        /* ===== 分类页专用 ===== */
        .category-banner {
            padding: 120px 0 60px; margin-top: var(--nav-height);
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1a2a4a 80%);
            position: relative; overflow: hidden;
        }
        .category-banner::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.1; mix-blend-mode: overlay;
        }
        .category-banner .container { position: relative; z-index: 2; }
        .category-banner h1 { color: var(--text-inverse); font-size: 2.4rem; }
        .category-banner p { color: rgba(250,248,245,0.6); max-width: 500px; margin-top: 12px; }
        .category-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
        .pagination { display: flex; justify-content: center; gap: 8px; margin-top: 40px; }
        .pagination a {
            padding: 10px 18px; border-radius: var(--radius-sm);
            border: 1px solid var(--border); font-weight: 500;
            transition: all var(--transition); color: var(--text);
        }
        .pagination a:hover { border-color: var(--secondary); color: var(--secondary); }
        .pagination a.active { background: var(--secondary); border-color: var(--secondary); color: var(--primary); }

        @media (max-width: 768px) {
            .article-banner h1 { font-size: 1.6rem; }
            .category-banner h1 { font-size: 1.6rem; }
            .category-grid { grid-template-columns: 1fr; }
            .news-item { flex-wrap: wrap; }
            .news-item .meta { width: 100%; justify-content: flex-start; gap: 16px; margin-top: 8px; }
            .article-body { padding: 24px 0; }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #7c3aed;
            --primary-light: #a78bfa;
            --primary-dark: #5b21b6;
            --secondary: #ec4899;
            --secondary-light: #f472b6;
            --accent: #f59e0b;
            --bg-body: #0f0e13;
            --bg-card: #1a1823;
            --bg-card-hover: #221f2f;
            --bg-section-alt: #14121a;
            --bg-nav: rgba(15, 14, 19, 0.92);
            --text-primary: #f1f0f6;
            --text-secondary: #b8b4cc;
            --text-muted: #7a7790;
            --border-color: #2e2a3e;
            --border-light: #3d3850;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.45);
            --shadow-hover: 0 16px 48px rgba(124, 58, 237, 0.20);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
            --container-max: 1200px;
            --container-padding: 1.5rem;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            min-height: 100vh;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
            border: none;
            background: none;
            color: inherit;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-primary);
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: var(--container-padding);
            padding-right: var(--container-padding);
        }

        /* ===== Header / Nav ===== */
        #header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: var(--bg-nav);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            transition: background var(--transition);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--container-padding);
            height: 68px;
            gap: 1rem;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-primary);
            flex-shrink: 0;
            transition: opacity var(--transition);
        }
        .nav-logo i {
            color: var(--primary-light);
            font-size: 1.5rem;
        }
        .nav-logo:hover {
            opacity: 0.85;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            flex: 1;
            justify-content: center;
        }
        .nav-links a {
            padding: 0.5rem 1rem;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-secondary);
            transition: all var(--transition);
            position: relative;
        }
        .nav-links a:hover {
            color: var(--text-primary);
            background: rgba(124, 58, 237, 0.08);
        }
        .nav-links a.active {
            color: #fff;
            background: rgba(124, 58, 237, 0.18);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 3px;
            background: var(--primary-light);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            flex-shrink: 0;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 100px;
            padding: 0.35rem 0.75rem 0.35rem 1rem;
            gap: 0.5rem;
            transition: border-color var(--transition), box-shadow var(--transition);
            max-width: 200px;
        }
        .nav-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.15);
        }
        .nav-search i {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .nav-search input {
            background: transparent;
            border: none;
            padding: 0.4rem 0;
            font-size: 0.9rem;
            color: var(--text-primary);
            width: 100%;
            min-width: 80px;
        }
        .nav-search input::placeholder {
            color: var(--text-muted);
        }
        .nav-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.45rem;
            padding: 0.5rem 1.2rem;
            border-radius: 100px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition);
            cursor: pointer;
            white-space: nowrap;
        }
        .nav-btn-primary {
            background: var(--primary);
            color: #fff;
            border: 1px solid transparent;
        }
        .nav-btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 6px 24px rgba(124, 58, 237, 0.35);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 4px;
            cursor: pointer;
            background: transparent;
            border: none;
        }
        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: all var(--transition);
        }
        .nav-toggle.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Mobile Nav ===== */
        .mobile-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(8px);
            z-index: 998;
            opacity: 0;
            transition: opacity var(--transition);
        }
        .mobile-overlay.show {
            opacity: 1;
        }

        /* ===== Page Hero (Banner) ===== */
        .page-hero {
            position: relative;
            padding: 140px 0 80px;
            background: linear-gradient(135deg, #1a0e2e 0%, #0f0e13 60%, #1a0e2e 100%);
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.15;
            pointer-events: none;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-hero h1 {
            font-size: 3rem;
            font-weight: 800;
            margin-bottom: 1rem;
            background: linear-gradient(135deg, #f1f0f6 0%, #a78bfa 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-hero p {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 720px;
            margin: 0 auto 1.5rem;
            line-height: 1.8;
        }
        .page-hero .hero-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 0.6rem;
            margin-top: 1rem;
        }
        .page-hero .hero-tags span {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            padding: 0.4rem 1rem;
            border-radius: 100px;
            background: rgba(124, 58, 237, 0.12);
            border: 1px solid rgba(124, 58, 237, 0.18);
            font-size: 0.85rem;
            color: var(--text-secondary);
            transition: all var(--transition);
        }
        .page-hero .hero-tags span i {
            color: var(--primary-light);
            font-size: 0.8rem;
        }
        .page-hero .hero-tags span:hover {
            background: rgba(124, 58, 237, 0.2);
            color: var(--text-primary);
            transform: translateY(-2px);
        }

        /* ===== Section Common ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-section-alt);
        }
        .section-header {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 0.75rem;
        }
        .section-header p {
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto;
            font-size: 1.05rem;
        }
        .section-header .subtitle-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.3rem 1rem;
            border-radius: 100px;
            background: rgba(124, 58, 237, 0.1);
            border: 1px solid rgba(124, 58, 237, 0.15);
            font-size: 0.85rem;
            color: var(--primary-light);
            margin-bottom: 0.75rem;
        }

        /* ===== Filter Bar ===== */
        .filter-bar {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 0.5rem;
            margin-bottom: 2.5rem;
            padding: 0.75rem 1.25rem;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
        }
        .filter-bar .filter-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            font-weight: 500;
            margin-right: 0.5rem;
        }
        .filter-bar .filter-btn {
            padding: 0.35rem 1rem;
            border-radius: 100px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: transparent;
            border: 1px solid var(--border-color);
            cursor: pointer;
            transition: all var(--transition);
        }
        .filter-bar .filter-btn:hover {
            border-color: var(--primary);
            color: var(--text-primary);
        }
        .filter-bar .filter-btn.active {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }
        .filter-bar .filter-btn i {
            margin-right: 0.3rem;
            font-size: 0.75rem;
        }

        /* ===== Guide Grid ===== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .guide-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .guide-card:hover {
            border-color: var(--border-light);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .guide-card .card-img {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--bg-section-alt);
        }
        .guide-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .guide-card:hover .card-img img {
            transform: scale(1.05);
        }
        .guide-card .card-img .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 0.25rem 0.75rem;
            border-radius: 100px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(124, 58, 237, 0.85);
            color: #fff;
            backdrop-filter: blur(4px);
        }
        .guide-card .card-img .card-duration {
            position: absolute;
            bottom: 12px;
            right: 12px;
            padding: 0.2rem 0.7rem;
            border-radius: 100px;
            font-size: 0.75rem;
            font-weight: 500;
            background: rgba(0, 0, 0, 0.65);
            color: #fff;
            backdrop-filter: blur(4px);
        }
        .guide-card .card-body {
            padding: 1.25rem 1.25rem 1.5rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .guide-card .card-body .card-meta {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 0.6rem;
        }
        .guide-card .card-body .card-meta span {
            display: flex;
            align-items: center;
            gap: 0.3rem;
        }
        .guide-card .card-body .card-meta .badge {
            padding: 0.15rem 0.6rem;
            border-radius: 100px;
            background: rgba(236, 72, 153, 0.12);
            color: var(--secondary-light);
            font-size: 0.7rem;
            font-weight: 600;
        }
        .guide-card .card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            line-height: 1.4;
            transition: color var(--transition);
        }
        .guide-card:hover .card-body h3 {
            color: var(--primary-light);
        }
        .guide-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 1rem;
        }
        .guide-card .card-body .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 0.75rem;
            border-top: 1px solid var(--border-color);
        }
        .guide-card .card-body .card-footer .author {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .guide-card .card-body .card-footer .author i {
            font-size: 0.75rem;
            color: var(--primary-light);
        }
        .guide-card .card-body .card-footer .read-more {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary-light);
            transition: all var(--transition);
        }
        .guide-card .card-body .card-footer .read-more:hover {
            color: #fff;
            gap: 0.3rem;
        }
        .guide-card .card-body .card-footer .read-more i {
            margin-left: 0.3rem;
            font-size: 0.75rem;
            transition: transform var(--transition);
        }
        .guide-card .card-body .card-footer .read-more:hover i {
            transform: translateX(3px);
        }

        /* ===== Pagination ===== */
        .pagination-wrap {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 0.5rem;
            margin-top: 3rem;
        }
        .pagination-wrap a,
        .pagination-wrap span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .pagination-wrap a:hover {
            border-color: var(--primary);
            color: var(--text-primary);
            background: rgba(124, 58, 237, 0.08);
        }
        .pagination-wrap .active {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }
        .pagination-wrap .ellipsis {
            border: none;
            background: transparent;
            color: var(--text-muted);
        }

        /* ===== Popular Guides ===== */
        .popular-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.25rem;
        }
        .popular-card {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: 1rem;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
        }
        .popular-card:hover {
            border-color: var(--border-light);
            transform: translateX(4px);
            box-shadow: var(--shadow-card);
        }
        .popular-card .num {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary-light);
            opacity: 0.5;
            min-width: 36px;
            text-align: center;
        }
        .popular-card .info h4 {
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 0.2rem;
        }
        .popular-card .info span {
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .popular-card .info span i {
            margin-right: 0.25rem;
            color: var(--accent);
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.75rem;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-light);
        }
        .faq-item .faq-q {
            padding: 1.1rem 1.5rem;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
            color: var(--text-primary);
            transition: background var(--transition);
            user-select: none;
        }
        .faq-item .faq-q:hover {
            background: rgba(124, 58, 237, 0.04);
        }
        .faq-item .faq-q i {
            color: var(--primary-light);
            transition: transform var(--transition);
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .faq-item.open .faq-q i {
            transform: rotate(180deg);
        }
        .faq-item .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 1.5rem;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-a {
            max-height: 300px;
            padding: 0 1.5rem 1.2rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, #1a0e2e 0%, #0f0e13 100%);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.06;
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2.4rem;
            font-weight: 800;
            margin-bottom: 1rem;
        }
        .cta-section p {
            color: var(--text-secondary);
            max-width: 580px;
            margin: 0 auto 2rem;
            font-size: 1.1rem;
        }
        .cta-section .cta-btns {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1rem;
        }
        .cta-section .cta-btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            border-radius: 100px;
            font-weight: 700;
            font-size: 1rem;
            background: var(--primary);
            color: #fff;
            border: 1px solid transparent;
            transition: all var(--transition);
        }
        .cta-section .cta-btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(124, 58, 237, 0.35);
        }
        .cta-section .cta-btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            border-radius: 100px;
            font-weight: 600;
            font-size: 1rem;
            background: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .cta-section .cta-btn-secondary:hover {
            border-color: var(--primary);
            background: rgba(124, 58, 237, 0.06);
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        footer {
            background: var(--bg-section-alt);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .footer-brand .nav-logo {
            display: inline-flex;
            margin-bottom: 0.75rem;
        }
        .footer-brand p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 0.9rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.04em;
            color: var(--text-primary);
            margin-bottom: 1rem;
        }
        .footer-col a {
            display: block;
            padding: 0.3rem 0;
            font-size: 0.9rem;
            color: var(--text-secondary);
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary-light);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 1.5rem;
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .nav-links.open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: var(--bg-nav);
                backdrop-filter: blur(20px);
                border-bottom: 1px solid var(--border-color);
                padding: 1rem;
                gap: 0.25rem;
                z-index: 999;
            }
            .nav-links.open a {
                padding: 0.75rem 1rem;
                font-size: 1rem;
                width: 100%;
                text-align: left;
            }
            .nav-links.open a.active::after {
                display: none;
            }
            .nav-links.open a.active {
                background: rgba(124, 58, 237, 0.15);
            }
            .nav-search {
                max-width: 140px;
            }
            .nav-search input {
                min-width: 50px;
            }
            .nav-btn-primary span {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .page-hero h1 {
                font-size: 2.2rem;
            }
            .page-hero p {
                font-size: 1rem;
            }
            .section {
                padding: 50px 0;
            }
            .section-header h2 {
                font-size: 1.7rem;
            }
            .guide-grid {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
            .popular-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer-col {
                text-align: center;
            }
            .footer-brand .nav-logo {
                justify-content: center;
            }
            .footer-brand p {
                text-align: center;
                margin: 0 auto;
            }
            .cta-section h2 {
                font-size: 1.8rem;
            }
            .filter-bar {
                flex-wrap: nowrap;
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
                padding: 0.6rem 1rem;
                gap: 0.4rem;
            }
            .filter-bar .filter-label {
                flex-shrink: 0;
            }
            .filter-bar .filter-btn {
                flex-shrink: 0;
                font-size: 0.8rem;
                padding: 0.3rem 0.8rem;
            }
            .page-hero .hero-tags span {
                font-size: 0.75rem;
                padding: 0.3rem 0.8rem;
            }
        }
        @media (max-width: 520px) {
            :root {
                --container-padding: 1rem;
            }
            .nav-inner {
                gap: 0.5rem;
            }
            .nav-search {
                max-width: 100px;
            }
            .nav-search input {
                min-width: 40px;
                font-size: 0.8rem;
            }
            .nav-btn-primary {
                padding: 0.4rem 0.8rem;
                font-size: 0.8rem;
            }
            .page-hero {
                padding: 110px 0 50px;
            }
            .page-hero h1 {
                font-size: 1.7rem;
            }
            .section-header h2 {
                font-size: 1.4rem;
            }
            .guide-card .card-body h3 {
                font-size: 1rem;
            }
            .pagination-wrap a,
            .pagination-wrap span {
                width: 34px;
                height: 34px;
                font-size: 0.8rem;
            }
            .cta-section .cta-btn-primary,
            .cta-section .cta-btn-secondary {
                padding: 0.6rem 1.2rem;
                font-size: 0.9rem;
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #6366f1;
            --primary-dark: #4f46e5;
            --primary-light: #a5b4fc;
            --primary-bg: #eef2ff;
            --secondary: #f59e0b;
            --secondary-dark: #d97706;
            --accent: #ec4899;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --bg-card: #ffffff;
            --text: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 4px 24px rgba(99, 102, 241, 0.08);
            --shadow-lg: 0 12px 48px rgba(99, 102, 241, 0.12);
            --shadow-hover: 0 20px 60px rgba(99, 102, 241, 0.18);
            --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --nav-height: 72px;
        }

        /* ===== 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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        a:focus-visible { outline: 3px solid var(--primary-light); outline-offset: 2px; border-radius: var(--radius-xs); }
        button { cursor: pointer; font-family: inherit; border: none; background: none; }
        input, textarea { font-family: inherit; font-size: 1rem; }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

        /* ===== Header / Nav ===== */
        #header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            background: rgba(255,255,255,0.85); backdrop-filter: blur(20px) saturate(180%);
            border-bottom: 1px solid var(--border); height: var(--nav-height);
            transition: var(--transition);
        }
        #header .nav-inner {
            max-width: var(--max-width); margin: 0 auto; padding: 0 24px;
            display: flex; align-items: center; justify-content: space-between; height: 100%;
        }
        .nav-logo {
            display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.35rem;
            color: var(--text); letter-spacing: -0.3px;
        }
        .nav-logo i { color: var(--primary); font-size: 1.6rem; }
        .nav-logo span { background: linear-gradient(135deg, var(--primary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
        .nav-logo:hover span { -webkit-text-fill-color: transparent; }
        .nav-links { display: flex; align-items: center; gap: 8px; }
        .nav-links a {
            padding: 8px 18px; border-radius: 50px; font-size: 0.925rem; font-weight: 500;
            color: var(--text-secondary); transition: var(--transition); position: relative;
        }
        .nav-links a:hover { color: var(--primary); background: var(--primary-bg); }
        .nav-links a.active { color: var(--primary); background: var(--primary-bg); font-weight: 600; }
        .nav-links a.active::after { display: none; }
        .nav-actions { display: flex; align-items: center; gap: 14px; }
        .nav-search {
            display: flex; align-items: center; gap: 8px; background: var(--bg-alt);
            border: 1px solid var(--border); border-radius: 50px; padding: 6px 16px;
            transition: var(--transition); width: 200px;
        }
        .nav-search:focus-within { border-color: var(--primary-light); box-shadow: 0 0 0 4px rgba(99,102,241,0.1); }
        .nav-search i { color: var(--text-muted); font-size: 0.9rem; }
        .nav-search input { border: none; background: transparent; outline: none; width: 100%; font-size: 0.9rem; color: var(--text); }
        .nav-search input::placeholder { color: var(--text-muted); }
        .nav-btn {
            padding: 8px 22px; border-radius: 50px; font-size: 0.9rem; font-weight: 600;
            transition: var(--transition); display: flex; align-items: center; gap: 6px; white-space: nowrap;
        }
        .nav-btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff; box-shadow: 0 4px 16px rgba(99,102,241,0.3);
        }
        .nav-btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(99,102,241,0.4); color: #fff; }
        .nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; border-radius: var(--radius-xs); }
        .nav-toggle span { width: 26px; height: 2.5px; background: var(--text); border-radius: 4px; transition: var(--transition); }
        .nav-toggle:hover span { background: var(--primary); }

        /* ===== Article Detail ===== */
        .article-banner {
            margin-top: var(--nav-height); padding: 60px 0 40px;
            background: linear-gradient(135deg, var(--primary-bg) 0%, #f0f4ff 100%);
            position: relative; overflow: hidden;
        }
        .article-banner::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.08; pointer-events: none;
        }
        .article-banner .container { position: relative; z-index: 1; }
        .article-breadcrumb {
            display: flex; align-items: center; gap: 8px; font-size: 0.85rem; color: var(--text-muted); margin-bottom: 20px;
        }
        .article-breadcrumb a { color: var(--text-muted); }
        .article-breadcrumb a:hover { color: var(--primary); }
        .article-breadcrumb i { font-size: 0.7rem; }
        .article-category-badge {
            display: inline-block; padding: 4px 16px; border-radius: 50px;
            background: var(--primary); color: #fff; font-size: 0.8rem; font-weight: 600;
            margin-bottom: 16px; letter-spacing: 0.3px;
        }
        .article-title {
            font-size: 2.4rem; font-weight: 800; line-height: 1.25; color: var(--text);
            max-width: 860px; letter-spacing: -0.5px; margin-bottom: 20px;
        }
        .article-meta {
            display: flex; flex-wrap: wrap; gap: 20px; align-items: center; color: var(--text-secondary);
            font-size: 0.9rem; margin-bottom: 8px;
        }
        .article-meta i { color: var(--primary); width: 18px; margin-right: 4px; }
        .article-meta span { display: flex; align-items: center; gap: 4px; }

        /* ===== Article Body ===== */
        .article-section { padding: 50px 0 70px; background: var(--bg); }
        .article-layout { display: grid; grid-template-columns: 1fr 320px; gap: 48px; align-items: start; }
        .article-main { min-width: 0; }
        .article-featured-image {
            border-radius: var(--radius); overflow: hidden; margin-bottom: 36px;
            box-shadow: var(--shadow-lg); position: relative;
        }
        .article-featured-image img { width: 100%; height: auto; aspect-ratio: 16/9; object-fit: cover; }
        .article-content {
            font-size: 1.05rem; line-height: 1.85; color: var(--text-secondary);
        }
        .article-content p { margin-bottom: 1.6em; }
        .article-content h2 { font-size: 1.6rem; font-weight: 700; color: var(--text); margin: 2em 0 0.8em; letter-spacing: -0.3px; }
        .article-content h3 { font-size: 1.25rem; font-weight: 600; color: var(--text); margin: 1.6em 0 0.6em; }
        .article-content ul, .article-content ol { margin: 1em 0 1.6em 1.6em; }
        .article-content li { margin-bottom: 0.4em; }
        .article-content a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
        .article-content a:hover { color: var(--primary-dark); }
        .article-content blockquote {
            border-left: 4px solid var(--primary); padding: 1em 1.6em; margin: 1.6em 0;
            background: var(--primary-bg); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text); font-style: italic;
        }
        .article-content img { border-radius: var(--radius-sm); margin: 1.6em 0; box-shadow: var(--shadow); }
        .article-content code {
            background: var(--bg-alt); padding: 2px 8px; border-radius: var(--radius-xs);
            font-size: 0.9em; color: var(--accent);
        }
        .article-tags {
            display: flex; flex-wrap: wrap; gap: 10px; margin-top: 40px; padding-top: 30px;
            border-top: 1px solid var(--border);
        }
        .article-tags .tag {
            padding: 6px 18px; border-radius: 50px; background: var(--bg-alt);
            color: var(--text-secondary); font-size: 0.85rem; font-weight: 500;
            border: 1px solid var(--border); transition: var(--transition);
        }
        .article-tags .tag:hover { background: var(--primary-bg); color: var(--primary); border-color: var(--primary-light); }

        /* ===== Sidebar ===== */
        .article-sidebar { position: sticky; top: calc(var(--nav-height) + 24px); }
        .sidebar-card {
            background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
            padding: 28px; margin-bottom: 28px; box-shadow: var(--shadow);
        }
        .sidebar-card h3 {
            font-size: 1.1rem; font-weight: 700; color: var(--text); margin-bottom: 16px;
            display: flex; align-items: center; gap: 8px;
        }
        .sidebar-card h3 i { color: var(--primary); }
        .sidebar-list { list-style: none; }
        .sidebar-list li { border-bottom: 1px solid var(--border-light); padding: 12px 0; }
        .sidebar-list li:last-child { border-bottom: none; }
        .sidebar-list a {
            display: flex; align-items: flex-start; gap: 12px; color: var(--text-secondary);
            font-size: 0.9rem; line-height: 1.5;
        }
        .sidebar-list a:hover { color: var(--primary); }
        .sidebar-list a i { margin-top: 3px; color: var(--primary-light); font-size: 0.75rem; }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff; border: none; padding: 20px 28px;
        }
        .sidebar-cta h3 { color: #fff; }
        .sidebar-cta h3 i { color: rgba(255,255,255,0.8); }
        .sidebar-cta p { color: rgba(255,255,255,0.85); font-size: 0.9rem; margin-bottom: 18px; }
        .sidebar-cta .btn-light {
            display: inline-block; padding: 10px 28px; border-radius: 50px;
            background: #fff; color: var(--primary); font-weight: 600; font-size: 0.9rem;
            transition: var(--transition);
        }
        .sidebar-cta .btn-light:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.15); color: var(--primary-dark); }

        /* ===== Related Posts ===== */
        .related-section { padding: 60px 0; background: var(--bg-alt); border-top: 1px solid var(--border); }
        .related-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 32px; }
        .related-header h2 { font-size: 1.6rem; font-weight: 700; color: var(--text); }
        .related-header a { font-size: 0.9rem; color: var(--primary); font-weight: 500; }
        .related-grid {
            display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
        }
        .related-card {
            background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
            overflow: hidden; transition: var(--transition); box-shadow: var(--shadow);
        }
        .related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
        .related-card img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
        .related-card-body { padding: 20px; }
        .related-card-body h3 { font-size: 1rem; font-weight: 600; margin-bottom: 8px; line-height: 1.4; }
        .related-card-body h3 a { color: var(--text); }
        .related-card-body h3 a:hover { color: var(--primary); }
        .related-card-body .meta { font-size: 0.8rem; color: var(--text-muted); display: flex; gap: 12px; }

        /* ===== Article Not Found ===== */
        .not-found-box {
            text-align: center; padding: 80px 20px; max-width: 560px; margin: 0 auto;
        }
        .not-found-box i { font-size: 4rem; color: var(--primary-light); margin-bottom: 20px; display: block; }
        .not-found-box h2 { font-size: 1.6rem; font-weight: 700; margin-bottom: 12px; color: var(--text); }
        .not-found-box p { color: var(--text-secondary); margin-bottom: 24px; }
        .not-found-box .btn-back {
            display: inline-block; padding: 12px 32px; border-radius: 50px;
            background: var(--primary); color: #fff; font-weight: 600; transition: var(--transition);
        }
        .not-found-box .btn-back:hover { background: var(--primary-dark); transform: translateY(-2px); color: #fff; }

        /* ===== Footer ===== */
        footer {
            background: #0f172a; color: rgba(255,255,255,0.75); padding: 60px 0 0;
        }
        footer .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 .footer-brand .nav-logo { color: #fff; margin-bottom: 16px; }
        footer .footer-brand .nav-logo span { -webkit-text-fill-color: #fff; background: none; }
        footer .footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.6); max-width: 360px; }
        footer .footer-col h4 { color: #fff; font-size: 0.95rem; font-weight: 600; margin-bottom: 16px; }
        footer .footer-col a {
            display: block; color: rgba(255,255,255,0.55); font-size: 0.88rem; padding: 5px 0;
            transition: var(--transition);
        }
        footer .footer-col a:hover { color: var(--primary-light); padding-left: 4px; }
        footer .footer-bottom {
            padding: 24px 0; text-align: center; font-size: 0.85rem; color: rgba(255,255,255,0.4);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-sidebar { position: static; display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (max-width: 768px) {
            #header .nav-inner { padding: 0 16px; }
            .nav-links {
                position: fixed; top: var(--nav-height); left: 0; right: 0; background: rgba(255,255,255,0.98);
                backdrop-filter: blur(20px); flex-direction: column; padding: 20px; gap: 4px;
                border-bottom: 1px solid var(--border); transform: translateY(-120%); opacity: 0;
                pointer-events: none; transition: var(--transition); box-shadow: var(--shadow-lg);
            }
            .nav-links.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
            .nav-links a { width: 100%; text-align: center; padding: 12px; font-size: 1rem; }
            .nav-search { width: 140px; }
            .nav-search input { width: 80px; }
            .nav-btn-primary span { display: none; }
            .nav-toggle { display: flex; }
            .article-title { font-size: 1.7rem; }
            .article-banner { padding: 40px 0 28px; }
            .article-breadcrumb { font-size: 0.78rem; }
            .article-meta { gap: 12px; font-size: 0.82rem; }
            .article-sidebar { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: 1fr; }
            footer .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
        }

        @media (max-width: 520px) {
            :root { --nav-height: 64px; }
            .container { padding: 0 16px; }
            .nav-logo { font-size: 1.1rem; }
            .nav-logo i { font-size: 1.3rem; }
            .nav-search { width: 100px; padding: 4px 12px; }
            .nav-search input { width: 50px; font-size: 0.8rem; }
            .nav-btn { padding: 6px 14px; font-size: 0.8rem; }
            .article-title { font-size: 1.35rem; }
            .article-banner { padding: 30px 0 20px; }
            .article-content { font-size: 0.96rem; }
            .article-content h2 { font-size: 1.3rem; }
            footer .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            footer .footer-bottom { font-size: 0.78rem; }
            .related-header { flex-direction: column; align-items: flex-start; gap: 8px; }
        }