/* roulang page: index */
:root {
            --primary: #1B3A5C;
            --primary-dark: #0F2537;
            --primary-light: #2C5A84;
            --accent: #C8963E;
            --accent-light: #D9AB5A;
            --accent-glow: rgba(200, 150, 62, 0.18);
            --bg: #F6F8FB;
            --bg-alt: #EDF1F6;
            --surface: #FFFFFF;
            --text: #1a1a2e;
            --text-secondary: #5A6270;
            --text-muted: #88919E;
            --border: #DDE3EB;
            --border-light: #E9EDF2;
            --success: #1E7D5C;
            --warning: #D48B2A;
            --danger: #C0392B;
            --radius-sm: 6px;
            --radius: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-xs: 0 1px 2px rgba(15, 37, 55, 0.04);
            --shadow-sm: 0 2px 8px rgba(15, 37, 55, 0.06);
            --shadow: 0 4px 18px rgba(15, 37, 55, 0.08);
            --shadow-lg: 0 8px 32px rgba(15, 37, 55, 0.12);
            --shadow-xl: 0 16px 48px rgba(15, 37, 55, 0.16);
            --nav-width: 250px;
            --header-height: 64px;
            --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", system-ui, sans-serif;
            --font-mono: "SF Mono", "Cascadia Code", "Consolas", monospace;
        }

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

        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; font-size: 16px; }

        body {
            font-family: var(--font-sans);
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
            display: flex;
            flex-direction: row;
        }

        a { color: inherit; text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; }
        button { cursor: pointer; font-family: inherit; border: none; background: none; }
        input, textarea { font-family: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }

        /* ============ LEFT SIDEBAR NAV ============ */
        .site-nav {
            position: fixed;
            left: 0;
            top: 0;
            width: var(--nav-width);
            height: 100vh;
            background: linear-gradient(180deg, #0F2537 0%, #122D42 40%, #0F2537 100%);
            color: #c8d6e5;
            z-index: 1000;
            display: flex;
            flex-direction: column;
            box-shadow: 2px 0 20px rgba(15, 37, 55, 0.25);
            overflow-y: auto;
            overflow-x: hidden;
            transition: transform var(--transition);
        }

        .nav-brand {
            padding: 28px 22px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            flex-shrink: 0;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 0.03em;
            white-space: nowrap;
        }

        .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: #fff;
            flex-shrink: 0;
        }

        .nav-menu {
            flex: 1;
            padding: 16px 14px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .nav-menu a {
            display: flex;
            align-items: center;
            gap: 11px;
            padding: 11px 16px;
            border-radius: var(--radius);
            color: #b0c4d6;
            font-size: 0.95rem;
            font-weight: 500;
            transition: all var(--transition);
            position: relative;
            white-space: nowrap;
        }

        .nav-menu a i {
            width: 20px;
            text-align: center;
            font-size: 0.95rem;
            flex-shrink: 0;
        }

        .nav-menu a:hover {
            background: rgba(255, 255, 255, 0.06);
            color: #ffffff;
        }

        .nav-menu a.active {
            background: rgba(200, 150, 62, 0.15);
            color: var(--accent-light);
            font-weight: 600;
            box-shadow: inset 3px 0 0 var(--accent);
        }

        .nav-footer {
            padding: 16px 22px 22px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            flex-shrink: 0;
            font-size: 0.78rem;
            color: #6a8094;
            text-align: center;
        }

        .nav-footer .nav-copyright {
            line-height: 1.5;
        }

        /* ============ MAIN CONTENT AREA ============ */
        .main-wrapper {
            margin-left: var(--nav-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            transition: margin var(--transition);
        }

        /* ============ MOBILE HEADER ============ */
        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            z-index: 999;
            background: var(--primary-dark);
            color: #fff;
            padding: 0 18px;
            height: var(--header-height);
            align-items: center;
            justify-content: space-between;
            box-shadow: 0 2px 12px rgba(0,0,0,0.2);
        }

        .mobile-header .mh-brand {
            font-weight: 700;
            font-size: 1.05rem;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .mobile-header .mh-brand .logo-icon-sm {
            width: 30px;
            height: 30px;
            border-radius: 5px;
            background: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
            color: #fff;
        }

        .hamburger {
            display: flex;
            flex-direction: column;
            gap: 5px;
            padding: 8px 4px;
            cursor: pointer;
            z-index: 1002;
        }

        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: #fff;
            border-radius: 3px;
            transition: all var(--transition);
            transform-origin: center;
        }

        .nav-open .hamburger span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
        .nav-open .hamburger span:nth-child(2) { opacity: 0; }
        .nav-open .hamburger span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

        .nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.55);
            z-index: 998;
            opacity: 0;
            transition: opacity var(--transition);
            pointer-events: none;
        }
        .nav-open .nav-overlay { opacity: 1; pointer-events: auto; }

        /* ============ CONTAINER ============ */
        .container { width: 100%; max-width: 1100px; margin: 0 auto; padding: 0 32px; }
        .container-wide { max-width: 1240px; }
        .container-narrow { max-width: 820px; }

        /* ============ SECTIONS ============ */
        .section { padding: 60px 0; }
        .section-sm { padding: 36px 0; }
        .section-lg { padding: 80px 0; }

        .section-label {
            display: inline-block;
            font-size: 0.82rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--accent);
            background: var(--accent-glow);
            padding: 5px 14px;
            border-radius: 20px;
            margin-bottom: 14px;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: 0.01em;
            color: var(--text);
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 620px;
            line-height: 1.6;
        }

        /* ============ HERO ============ */
        .hero {
            background: linear-gradient(155deg, #0F2537 0%, #1B3A5C 35%, #1a3d5e 60%, #0F2537 100%);
            color: #ffffff;
            padding: 70px 0 80px;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.16;
            z-index: 0;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: linear-gradient(to top, var(--bg) 0%, transparent 100%);
            z-index: 1;
        }

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

        .hero-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .hero-text h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
            line-height: 1.25;
        }

        .hero-text h1 .highlight {
            color: var(--accent-light);
            position: relative;
        }

        .hero-text .hero-desc {
            font-size: 1.08rem;
            color: #c0cfdf;
            line-height: 1.7;
            margin-bottom: 28px;
            max-width: 480px;
        }

        .hero-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 26px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: var(--radius);
            transition: all var(--transition);
            letter-spacing: 0.02em;
            white-space: nowrap;
            border: 2px solid transparent;
        }

        .btn-primary {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
            box-shadow: 0 4px 16px rgba(200, 150, 62, 0.35);
        }

        .btn-primary:hover {
            background: var(--accent-light);
            border-color: var(--accent-light);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(200, 150, 62, 0.45);
        }

        .btn-outline {
            background: transparent;
            color: #ffffff;
            border-color: rgba(255, 255, 255, 0.35);
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.6);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-sm { padding: 9px 18px; font-size: 0.85rem; border-radius: var(--radius-sm); }
        .btn-lg { padding: 16px 34px; font-size: 1.05rem; border-radius: var(--radius-lg); }

        .hero-visual {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .hero-card-stack {
            position: relative;
            width: 100%;
            max-width: 440px;
        }

        .hero-card-stack .hc-main {
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-lg);
            padding: 36px 28px;
            position: relative;
            z-index: 2;
        }

        .hero-card-stack .hc-stat-row {
            display: flex;
            gap: 28px;
            margin-top: 20px;
        }

        .hc-stat .stat-num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-light);
        }

        .hc-stat .stat-label {
            font-size: 0.82rem;
            color: #b0c4d6;
            margin-top: 2px;
        }

        .hero-card-stack .hc-shadow {
            position: absolute;
            top: 16px;
            left: 16px;
            right: -16px;
            bottom: -16px;
            background: rgba(255, 255, 255, 0.03);
            border-radius: var(--radius-lg);
            z-index: 1;
        }

        /* ============ CARDS ============ */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 24px;
        }

        .card-grid-3 { grid-template-columns: repeat(3, 1fr); }
        .card-grid-2 { grid-template-columns: repeat(2, 1fr); }

        .card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 28px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-xs);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }

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

        .card .card-icon {
            width: 50px;
            height: 50px;
            border-radius: var(--radius);
            background: var(--accent-glow);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--accent);
            margin-bottom: 16px;
        }

        .card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }

        .card p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .card-cover {
            padding: 0;
            overflow: hidden;
        }

        .card-cover img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: var(--radius-lg) var(--radius-lg) 0 0;
        }

        .card-cover .card-body {
            padding: 22px 24px 24px;
        }

        .card-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 14px;
            background: var(--accent-glow);
            color: var(--accent);
            margin-bottom: 10px;
            letter-spacing: 0.03em;
        }

        /* ============ STATS BAR ============ */
        .stats-bar {
            background: var(--surface);
            border-top: 1px solid var(--border-light);
            border-bottom: 1px solid var(--border-light);
            padding: 36px 0;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            text-align: center;
        }

        .stat-item .stat-value {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.02em;
        }

        .stat-item .stat-value .plus { color: var(--accent); }
        .stat-item .stat-desc {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ============ CMS LIST ============ */
        .cms-list {
            display: grid;
            gap: 14px;
        }

        .cms-list-item {
            display: flex;
            align-items: center;
            gap: 18px;
            background: var(--surface);
            border-radius: var(--radius);
            padding: 18px 22px;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }

        .cms-list-item:hover {
            box-shadow: var(--shadow);
            border-color: var(--border);
            transform: translateX(3px);
        }

        .cms-list-item .cms-date {
            font-size: 0.8rem;
            color: var(--text-muted);
            white-space: nowrap;
            min-width: 80px;
            text-align: center;
            background: var(--bg-alt);
            padding: 6px 12px;
            border-radius: var(--radius-sm);
            font-weight: 500;
        }

        .cms-list-item .cms-info h4 {
            font-size: 0.98rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 3px;
        }

        .cms-list-item .cms-info .cms-excerpt {
            font-size: 0.84rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        .cms-list-item .cms-arrow {
            margin-left: auto;
            color: var(--text-muted);
            font-size: 0.85rem;
            transition: all var(--transition);
            flex-shrink: 0;
        }

        .cms-list-item:hover .cms-arrow {
            color: var(--accent);
            transform: translateX(4px);
        }

        .cms-empty {
            text-align: center;
            padding: 40px;
            color: var(--text-muted);
            font-size: 0.95rem;
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px dashed var(--border);
        }

        /* ============ FEATURE GRID WITH IMAGE ============ */
        .feature-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .feature-row.reverse { direction: rtl; }
        .feature-row.reverse .feature-content { direction: ltr; }

        .feature-image img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            width: 100%;
        }

        .feature-content h3 {
            font-size: 1.55rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .feature-content p {
            font-size: 0.98rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 18px;
        }

        .feature-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.93rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        .feature-list li i {
            color: var(--success);
            margin-top: 3px;
            flex-shrink: 0;
        }

        /* ============ FAQ ============ */
        .faq-list {
            display: grid;
            gap: 12px;
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--surface);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }

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

        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 0.98rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            color: var(--text);
            user-select: none;
        }

        .faq-question i {
            transition: transform var(--transition);
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.65;
            display: none;
        }

        .faq-item.open .faq-answer { display: block; }
        .faq-item.open .faq-question i { transform: rotate(180deg); color: var(--accent); }
        .faq-item.open { border-color: var(--accent-light); box-shadow: var(--shadow); }

        /* ============ CTA ============ */
        .cta-section {
            background: linear-gradient(135deg, #1B3A5C 0%, #0F2537 100%);
            color: #fff;
            text-align: center;
            padding: 60px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }

        .cta-section .container { position: relative; z-index: 1; }
        .cta-section h2 { color: #fff; font-size: 1.8rem; margin-bottom: 10px; }
        .cta-section p { color: #c0cfdf; margin-bottom: 24px; font-size: 0.98rem; }

        .btn-cta {
            background: var(--accent);
            color: #fff;
            font-size: 1rem;
            padding: 15px 36px;
            border-radius: var(--radius);
            font-weight: 700;
            letter-spacing: 0.03em;
            box-shadow: 0 6px 22px rgba(200, 150, 62, 0.4);
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            border: none;
        }

        .btn-cta:hover {
            background: var(--accent-light);
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(200, 150, 62, 0.5);
            color: #fff;
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: #0F2537;
            color: #8a9db0;
            padding: 40px 0 28px;
            margin-top: auto;
            border-top: 1px solid rgba(255,255,255,0.06);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 28px;
        }

        .footer-brand h4 {
            color: #fff;
            font-size: 1.1rem;
            margin-bottom: 8px;
            font-weight: 700;
        }

        .footer-brand p {
            font-size: 0.85rem;
            line-height: 1.6;
            color: #7a8fa0;
        }

        .footer-links h5 {
            color: #c8d6e5;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 12px;
            letter-spacing: 0.04em;
            text-transform: uppercase;
        }

        .footer-links ul {
            display: flex;
            flex-direction: column;
            gap: 7px;
        }

        .footer-links a {
            font-size: 0.85rem;
            color: #7a8fa0;
            transition: color var(--transition);
        }

        .footer-links a:hover { color: var(--accent-light); }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.07);
            padding-top: 18px;
            text-align: center;
            font-size: 0.8rem;
            color: #6a8094;
        }

        /* ============ BREADCRUMB ============ */
        .breadcrumb {
            display: flex;
            gap: 6px;
            align-items: center;
            font-size: 0.85rem;
            color: var(--text-muted);
            padding: 16px 0;
            flex-wrap: wrap;
        }

        .breadcrumb a { color: var(--text-secondary); }
        .breadcrumb a:hover { color: var(--accent); }
        .breadcrumb .sep { color: #c0c8d2; }

        /* ============ PAGE BANNER (inner) ============ */
        .page-banner {
            background: linear-gradient(155deg, #0F2537 0%, #1B3A5C 50%, #0F2537 100%);
            color: #fff;
            padding: 48px 0;
            position: relative;
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: 0.12;
            z-index: 0;
        }

        .page-banner .container { position: relative; z-index: 1; }
        .page-banner h1 { color: #fff; font-size: 2rem; font-weight: 800; margin-bottom: 6px; }
        .page-banner .banner-sub { color: #c0cfdf; font-size: 0.95rem; }

        /* ============ ARTICLE DETAIL ============ */
        .article-detail {
            max-width: 780px;
            margin: 0 auto;
        }

        .article-header {
            margin-bottom: 28px;
            padding-bottom: 20px;
            border-bottom: 1px solid var(--border-light);
        }

        .article-header .article-meta {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            font-size: 0.84rem;
            color: var(--text-muted);
            margin-top: 8px;
        }

        .article-header .article-meta span {
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .article-body {
            font-size: 0.98rem;
            line-height: 1.85;
            color: var(--text);
        }

        .article-body h2 {
            font-size: 1.35rem;
            margin: 28px 0 12px;
            padding-top: 8px;
        }

        .article-body h3 {
            font-size: 1.15rem;
            margin: 22px 0 10px;
        }

        .article-body p {
            margin-bottom: 14px;
            color: #2d3748;
        }

        .article-body ul, .article-body ol {
            margin: 10px 0 16px 20px;
            padding-left: 8px;
        }

        .article-body li {
            margin-bottom: 6px;
            list-style: disc;
            color: #2d3748;
        }

        .article-body ol li { list-style: decimal; }

        .article-not-found {
            text-align: center;
            padding: 60px 30px;
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
        }

        .article-not-found h3 {
            font-size: 1.3rem;
            margin-bottom: 8px;
        }

        .article-not-found p {
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        /* ============ GUIDE STEPS ============ */
        .guide-steps {
            display: grid;
            gap: 20px;
            counter-reset: step;
        }

        .guide-step {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            background: var(--surface);
            border-radius: var(--radius-lg);
            padding: 24px 28px;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }

        .guide-step:hover {
            box-shadow: var(--shadow);
            border-color: var(--border);
        }

        .guide-step .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            flex-shrink: 0;
        }

        .guide-step .step-content h3 {
            font-size: 1.05rem;
            margin-bottom: 4px;
        }

        .guide-step .step-content p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ============ RESPONSIVE ============ */
        @media (max-width: 1024px) {
            :root { --nav-width: 220px; }
            .nav-logo { font-size: 1.1rem; }
            .container { padding: 0 24px; }
            .hero-content { gap: 32px; }
            .hero-text h1 { font-size: 2.1rem; }
            .card-grid-3 { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 768px) {
            :root { --nav-width: 0; }
            .site-nav {
                transform: translateX(-100%);
                width: 270px;
                box-shadow: 4px 0 30px rgba(0,0,0,0.4);
            }
            .nav-open .site-nav { transform: translateX(0); }
            .nav-overlay { display: block; }
            .main-wrapper { margin-left: 0; }
            .mobile-header { display: flex; }
            .hero { padding: 40px 0 50px; }
            .hero-content { grid-template-columns: 1fr; gap: 28px; }
            .hero-text h1 { font-size: 1.75rem; }
            .hero-visual { order: -1; }
            .hero-card-stack { max-width: 300px; margin: 0 auto; }
            .card-grid-3, .card-grid-2 { grid-template-columns: 1fr; }
            .feature-row { grid-template-columns: 1fr; gap: 28px; }
            .feature-row.reverse { direction: ltr; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .section { padding: 40px 0; }
            .section-lg { padding: 52px 0; }
            .section-title { font-size: 1.5rem; }
            .cms-list-item { flex-wrap: wrap; gap: 10px; }
            .cms-list-item .cms-date { min-width: auto; }
            .cms-list-item .cms-arrow { margin-left: 0; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .page-banner h1 { font-size: 1.5rem; }
            .guide-steps { gap: 14px; }
            .guide-step { padding: 18px 20px; }
            .btn-lg { padding: 13px 24px; font-size: 0.95rem; }
            .container { padding: 0 18px; }
        }

        @media (max-width: 520px) {
            .hero-text h1 { font-size: 1.45rem; }
            .hero-buttons { flex-direction: column; }
            .hero-buttons .btn { width: 100%; justify-content: center; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .stat-item .stat-value { font-size: 1.7rem; }
            .card-grid { grid-template-columns: 1fr; }
            .section-title { font-size: 1.3rem; }
            .faq-question { font-size: 0.9rem; padding: 14px 16px; }
            .faq-answer { padding: 0 16px 14px; font-size: 0.84rem; }
            .btn { padding: 11px 20px; font-size: 0.88rem; }
            .breadcrumb { font-size: 0.78rem; }
            .article-body { font-size: 0.9rem; }
        }

/* roulang page: article */
:root {
            --color-primary: #1a3a5c;
            --color-primary-light: #1e4d7b;
            --color-primary-dark: #0f2640;
            --color-accent: #c8872b;
            --color-accent-light: #e8a84c;
            --color-accent-soft: #fdf3e4;
            --color-bg: #f5f6f8;
            --color-bg-white: #ffffff;
            --color-text: #1e293b;
            --color-text-secondary: #64748b;
            --color-text-weak: #94a3b8;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --color-success: #16a34a;
            --color-success-bg: #f0fdf4;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 6px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 36px rgba(0,0,0,0.10);
            --shadow-xl: 0 20px 50px rgba(0,0,0,0.12);
            --space-xs: 8px;
            --space-sm: 16px;
            --space-md: 24px;
            --space-lg: 40px;
            --space-xl: 60px;
            --space-2xl: 80px;
            --nav-width: 250px;
            --transition-fast: 0.15s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.35s ease;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
        }

        *, *::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(--color-text);
            background-color: var(--color-bg);
            display: flex;
            min-height: 100vh;
            position: relative;
        }

        a {
            color: var(--color-primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--color-accent);
        }
        a:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
            border-radius: var(--radius-sm);
        }

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

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

        h1, h2, h3, h4, h5, h6 {
            line-height: 1.35;
            color: var(--color-primary-dark);
            font-weight: 700;
        }

        /* ===== LEFT SIDEBAR NAVIGATION ===== */
        .site-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--nav-width);
            height: 100vh;
            background: var(--color-primary-dark);
            color: #ffffff;
            display: flex;
            flex-direction: column;
            z-index: 100;
            overflow-y: auto;
            box-shadow: 4px 0 30px rgba(0,0,0,0.15);
            transition: transform var(--transition-slow);
        }

        .nav-brand {
            padding: 28px 24px 20px;
            border-bottom: 1px solid rgba(255,255,255,0.10);
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            color: #ffffff;
            font-size: 1.1rem;
            font-weight: 700;
            letter-spacing: 0.02em;
            text-decoration: none;
            transition: opacity var(--transition-fast);
        }
        .nav-logo:hover {
            opacity: 0.85;
            color: #ffffff;
        }
        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--color-accent);
            border-radius: var(--radius-md);
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .nav-menu {
            flex: 1;
            padding: 16px 12px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .nav-menu a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 16px;
            color: rgba(255,255,255,0.75);
            border-radius: var(--radius-md);
            font-size: 0.95rem;
            font-weight: 500;
            text-decoration: none;
            transition: all var(--transition-fast);
            position: relative;
        }
        .nav-menu a i {
            width: 20px;
            text-align: center;
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .nav-menu a:hover {
            color: #ffffff;
            background: rgba(255,255,255,0.08);
        }
        .nav-menu a.active {
            color: #ffffff;
            background: var(--color-accent);
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(200,135,43,0.3);
        }
        .nav-menu a.active i {
            color: #ffffff;
        }

        .nav-footer {
            padding: 20px 20px 24px;
            border-top: 1px solid rgba(255,255,255,0.10);
        }
        .nav-copyright {
            font-size: 0.78rem;
            color: rgba(255,255,255,0.45);
            line-height: 1.6;
        }

        /* ===== MAIN CONTENT AREA ===== */
        .main-wrapper {
            margin-left: var(--nav-width);
            flex: 1;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
            width: calc(100% - var(--nav-width));
        }

        main {
            flex: 1;
        }

        /* ===== BREADCRUMB ===== */
        .breadcrumb-bar {
            background: var(--color-bg-white);
            border-bottom: 1px solid var(--color-border);
            padding: 14px 0;
            position: sticky;
            top: 0;
            z-index: 50;
        }
        .breadcrumb-inner {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 var(--space-md);
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: var(--color-text-secondary);
            flex-wrap: wrap;
        }
        .breadcrumb-inner a {
            color: var(--color-text-secondary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        .breadcrumb-inner a:hover {
            color: var(--color-accent);
        }
        .breadcrumb-sep {
            color: var(--color-text-weak);
            font-size: 0.7rem;
        }
        .breadcrumb-current {
            color: var(--color-primary);
            font-weight: 600;
            max-width: 340px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* ===== ARTICLE HERO ===== */
        .article-hero {
            background: var(--color-bg-white);
            padding: var(--space-lg) 0 var(--space-md);
        }
        .article-hero-inner {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 var(--space-md);
        }
        .article-category-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--color-accent-soft);
            color: var(--color-accent);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.82rem;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.03em;
        }
        .article-category-badge i {
            font-size: 0.7rem;
        }
        .article-hero h1 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--color-primary-dark);
            margin-bottom: 12px;
            letter-spacing: 0.01em;
            line-height: 1.4;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 18px;
            flex-wrap: wrap;
            font-size: 0.88rem;
            color: var(--color-text-secondary);
        }
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 5px;
        }
        .article-meta i {
            color: var(--color-text-weak);
            font-size: 0.8rem;
        }

        /* ===== ARTICLE COVER ===== */
        .article-cover-wrap {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 var(--space-md) var(--space-sm);
        }
        .article-cover-img {
            width: 100%;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            object-fit: cover;
            max-height: 420px;
            aspect-ratio: 16 / 9;
        }

        /* ===== ARTICLE CONTENT ===== */
        .article-content-section {
            background: var(--color-bg-white);
            padding: var(--space-lg) 0 var(--space-xl);
            border-radius: var(--radius-xl) var(--radius-xl) 0 0;
            margin-top: -20px;
            position: relative;
            z-index: 5;
        }
        .article-content-inner {
            max-width: 800px;
            margin: 0 auto;
            padding: 0 var(--space-md);
        }
        .article-body {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--color-text);
        }
        .article-body h2 {
            font-size: 1.45rem;
            margin-top: 36px;
            margin-bottom: 16px;
            color: var(--color-primary-dark);
            padding-bottom: 8px;
            border-bottom: 2px solid var(--color-border-light);
        }
        .article-body h3 {
            font-size: 1.2rem;
            margin-top: 28px;
            margin-bottom: 12px;
            color: var(--color-primary);
        }
        .article-body p {
            margin-bottom: 16px;
        }
        .article-body ul, .article-body ol {
            margin-bottom: 18px;
            padding-left: 24px;
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .article-body blockquote {
            border-left: 4px solid var(--color-accent);
            background: var(--color-accent-soft);
            margin: 20px 0;
            padding: 16px 22px;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            color: var(--color-primary-dark);
            font-style: italic;
        }
        .article-body img {
            border-radius: var(--radius-md);
            margin: 20px 0;
            box-shadow: var(--shadow-sm);
        }
        .article-body strong {
            color: var(--color-primary-dark);
        }
        .article-body a {
            color: var(--color-accent);
            font-weight: 500;
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-body a:hover {
            color: var(--color-primary);
        }
        .article-body code {
            background: var(--color-bg);
            padding: 2px 8px;
            border-radius: var(--radius-sm);
            font-family: var(--font-mono);
            font-size: 0.9em;
            color: var(--color-primary);
        }
        .article-body pre {
            background: #1e293b;
            color: #e2e8f0;
            padding: 20px 24px;
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 20px 0;
            font-size: 0.9rem;
            line-height: 1.6;
        }
        .article-body pre code {
            background: none;
            color: inherit;
            padding: 0;
        }

        /* ===== ARTICLE FOOTER META ===== */
        .article-footer-meta {
            max-width: 800px;
            margin: 0 auto;
            padding: 20px var(--space-md) 0;
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            align-items: center;
            border-top: 1px solid var(--color-border);
        }
        .tag-pill {
            display: inline-block;
            background: var(--color-bg);
            color: var(--color-text-secondary);
            padding: 5px 12px;
            border-radius: 16px;
            font-size: 0.8rem;
            font-weight: 500;
        }

        /* ===== CTA SECTION ===== */
        .cta-section {
            background: var(--color-primary-dark);
            padding: var(--space-lg) 0;
            margin-top: 0;
        }
        .cta-inner {
            max-width: 800px;
            margin: 0 auto;
            padding: 0 var(--space-md);
            text-align: center;
        }
        .cta-inner h3 {
            color: #ffffff;
            font-size: 1.35rem;
            margin-bottom: 10px;
            font-weight: 700;
        }
        .cta-inner p {
            color: rgba(255,255,255,0.75);
            margin-bottom: 22px;
            font-size: 0.95rem;
        }
        .cta-buttons {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 26px;
            border-radius: 28px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            border: none;
            text-decoration: none;
            transition: all var(--transition-base);
            letter-spacing: 0.01em;
        }
        .btn-primary {
            background: var(--color-accent);
            color: #ffffff;
            box-shadow: 0 4px 16px rgba(200,135,43,0.3);
        }
        .btn-primary:hover {
            background: var(--color-accent-light);
            color: #ffffff;
            box-shadow: 0 6px 22px rgba(200,135,43,0.4);
            transform: translateY(-1px);
        }
        .btn-outline-light {
            background: transparent;
            color: #ffffff;
            border: 2px solid rgba(255,255,255,0.35);
        }
        .btn-outline-light:hover {
            background: rgba(255,255,255,0.08);
            border-color: rgba(255,255,255,0.6);
            color: #ffffff;
            transform: translateY(-1px);
        }

        /* ===== RELATED SECTION ===== */
        .related-section {
            background: var(--color-bg);
            padding: var(--space-lg) 0 var(--space-xl);
        }
        .related-inner {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 var(--space-md);
        }
        .related-inner h3 {
            font-size: 1.25rem;
            color: var(--color-primary-dark);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: 20px;
        }
        .related-card {
            background: var(--color-bg-white);
            border-radius: var(--radius-lg);
            padding: 20px 22px;
            box-shadow: var(--shadow-xs);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            text-decoration: none;
            display: block;
            color: var(--color-text);
        }
        .related-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-accent);
            transform: translateY(-3px);
            color: var(--color-text);
        }
        .related-card h4 {
            font-size: 1rem;
            color: var(--color-primary-dark);
            margin-bottom: 6px;
            transition: color var(--transition-fast);
        }
        .related-card:hover h4 {
            color: var(--color-accent);
        }
        .related-card p {
            font-size: 0.85rem;
            color: var(--color-text-secondary);
            line-height: 1.5;
        }
        .related-card .card-icon {
            font-size: 1.5rem;
            color: var(--color-accent);
            margin-bottom: 10px;
        }

        /* ===== EMPTY STATE ===== */
        .empty-state {
            max-width: 600px;
            margin: 0 auto;
            padding: 60px var(--space-md);
            text-align: center;
        }
        .empty-state .empty-icon {
            font-size: 4rem;
            color: var(--color-text-weak);
            margin-bottom: 20px;
        }
        .empty-state h2 {
            font-size: 1.5rem;
            color: var(--color-primary-dark);
            margin-bottom: 10px;
        }
        .empty-state p {
            color: var(--color-text-secondary);
            margin-bottom: 24px;
            font-size: 0.95rem;
        }
        .empty-state .btn {
            font-size: 0.95rem;
        }

        /* ===== FOOTER ===== */
        .site-footer {
            background: #0f2640;
            color: rgba(255,255,255,0.7);
            padding: var(--space-xl) 0 var(--space-md);
            margin-top: 0;
        }
        .site-footer .container {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 var(--space-md);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 30px;
            margin-bottom: var(--space-lg);
        }
        .footer-brand h4 {
            color: #ffffff;
            font-size: 1.1rem;
            margin-bottom: 8px;
            font-weight: 700;
        }
        .footer-brand p {
            font-size: 0.85rem;
            line-height: 1.7;
            color: rgba(255,255,255,0.55);
        }
        .footer-links h5 {
            color: #ffffff;
            font-size: 0.9rem;
            margin-bottom: 10px;
            font-weight: 600;
        }
        .footer-links ul {
            list-style: none;
            padding: 0;
        }
        .footer-links li {
            margin-bottom: 6px;
        }
        .footer-links a {
            color: rgba(255,255,255,0.55);
            font-size: 0.85rem;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        .footer-links a:hover {
            color: var(--color-accent-light);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.12);
            padding-top: 16px;
            text-align: center;
            font-size: 0.78rem;
            color: rgba(255,255,255,0.4);
        }

        /* ===== MOBILE TOGGLE BUTTON ===== */
        .nav-toggle-btn {
            display: none;
            position: fixed;
            top: 14px;
            left: 14px;
            z-index: 200;
            width: 42px;
            height: 42px;
            background: var(--color-primary-dark);
            color: #ffffff;
            border: none;
            border-radius: var(--radius-md);
            cursor: pointer;
            font-size: 1.2rem;
            box-shadow: var(--shadow-md);
            transition: all var(--transition-fast);
        }
        .nav-toggle-btn:hover {
            background: var(--color-accent);
        }

        /* ===== OVERLAY ===== */
        .nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.5);
            z-index: 95;
        }
        .nav-overlay.show {
            display: block;
        }

        /* ===== RESPONSIVE ===== */
        @media (max-width: 1024px) {
            :root {
                --nav-width: 230px;
            }
            .article-hero h1 {
                font-size: 1.7rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 768px) {
            body {
                flex-direction: column;
            }
            .site-nav {
                position: fixed;
                width: 260px;
                height: 100vh;
                transform: translateX(-100%);
                box-shadow: 6px 0 40px rgba(0,0,0,0.25);
            }
            .site-nav.open {
                transform: translateX(0);
            }
            .nav-toggle-btn {
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .main-wrapper {
                margin-left: 0;
                width: 100%;
                padding-top: 0;
            }
            .breadcrumb-bar {
                top: 0;
                padding-left: 56px;
            }
            .article-hero {
                padding: var(--space-md) 0 var(--space-sm);
            }
            .article-hero h1 {
                font-size: 1.4rem;
            }
            .article-cover-img {
                max-height: 260px;
                border-radius: var(--radius-md);
            }
            .article-content-section {
                border-radius: var(--radius-lg) var(--radius-lg) 0 0;
                margin-top: -14px;
                padding: var(--space-md) 0 var(--space-lg);
            }
            .article-body {
                font-size: 0.98rem;
                line-height: 1.75;
            }
            .article-body h2 {
                font-size: 1.25rem;
                margin-top: 24px;
            }
            .article-body h3 {
                font-size: 1.08rem;
            }
            .cta-inner h3 {
                font-size: 1.15rem;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .article-meta {
                gap: 10px;
                font-size: 0.8rem;
            }
            .empty-state {
                padding: 40px var(--space-md);
            }
            .empty-state .empty-icon {
                font-size: 3rem;
            }
        }

        @media (max-width: 520px) {
            .article-hero h1 {
                font-size: 1.2rem;
            }
            .article-category-badge {
                font-size: 0.75rem;
                padding: 5px 10px;
            }
            .btn {
                padding: 10px 20px;
                font-size: 0.88rem;
            }
            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
            .breadcrumb-inner {
                font-size: 0.78rem;
                gap: 4px;
            }
            .breadcrumb-current {
                max-width: 180px;
            }
            .article-cover-img {
                max-height: 200px;
            }
            .related-card {
                padding: 16px 18px;
            }
        }

/* roulang page: category1 */
:root {
            --color-primary: #1a56db;
            --color-primary-hover: #1648b8;
            --color-primary-light: #e8f0fe;
            --color-primary-dark: #103a8c;
            --color-accent: #0ea5e9;
            --color-accent-light: #e0f5fd;
            --color-bg: #f8fafc;
            --color-white: #ffffff;
            --color-text: #1e293b;
            --color-text-secondary: #64748b;
            --color-text-weak: #94a3b8;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --color-success: #10b981;
            --color-warning: #f59e0b;
            --color-danger: #ef4444;
            --color-nav-bg: #0f172a;
            --color-nav-text: #cbd5e1;
            --color-nav-hover: #e2e8f0;
            --color-nav-active: #ffffff;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
            --shadow-lg: 0 12px 32px rgba(0,0,0,0.10), 0 4px 8px rgba(0,0,0,0.05);
            --shadow-xl: 0 20px 48px rgba(0,0,0,0.12), 0 8px 16px rgba(0,0,0,0.06);
            --transition-base: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4,0,0.2,1);
            --nav-width: 250px;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            color: var(--color-text);
            background: var(--color-bg);
            line-height: 1.65;
            min-height: 100vh;
            display: flex;
            flex-direction: row;
        }

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

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

        button, input {
            font-family: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            outline: none;
        }

        input {
            outline: none;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            padding: 10px 14px;
            font-size: 0.95rem;
            transition: border-color var(--transition-base), box-shadow var(--transition-base);
            background: var(--color-white);
            color: var(--color-text);
        }
        input:focus {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 3px rgba(26,86,219,0.1);
        }

        /* ========== 左侧竖向导航（桌面端） ========== */
        .site-nav {
            width: var(--nav-width);
            min-width: var(--nav-width);
            height: 100vh;
            position: sticky;
            top: 0;
            background: var(--color-nav-bg);
            display: flex;
            flex-direction: column;
            z-index: 100;
            overflow-y: auto;
            overflow-x: hidden;
            border-right: 1px solid rgba(255,255,255,0.06);
            transition: transform var(--transition-smooth);
        }

        .nav-brand {
            padding: 22px 20px 18px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
            flex-shrink: 0;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--color-white);
            font-weight: 700;
            font-size: 1.05rem;
            letter-spacing: 0.02em;
            transition: opacity var(--transition-base);
        }
        .nav-logo:hover {
            opacity: 0.85;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--color-primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            color: #fff;
            flex-shrink: 0;
        }

        .nav-menu {
            flex: 1;
            padding: 14px 12px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .nav-menu a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 14px;
            border-radius: var(--radius-sm);
            color: var(--color-nav-text);
            font-size: 0.93rem;
            font-weight: 500;
            transition: all var(--transition-base);
            position: relative;
        }
        .nav-menu a i {
            width: 20px;
            text-align: center;
            font-size: 0.9rem;
        }
        .nav-menu a:hover {
            background: rgba(255,255,255,0.06);
            color: var(--color-nav-hover);
        }
        .nav-menu a.active {
            background: var(--color-primary);
            color: var(--color-white);
            font-weight: 600;
            box-shadow: 0 2px 8px rgba(26,86,219,0.35);
        }
        .nav-menu a.active i {
            color: var(--color-white);
        }

        .nav-footer {
            padding: 14px 16px;
            border-top: 1px solid rgba(255,255,255,0.08);
            flex-shrink: 0;
        }
        .nav-copyright {
            font-size: 0.75rem;
            color: rgba(255,255,255,0.35);
            line-height: 1.5;
            text-align: center;
        }

        /* ========== 移动端顶部导航 ========== */
        .mobile-nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--color-white);
            font-size: 1.4rem;
            cursor: pointer;
            padding: 8px;
            line-height: 1;
        }

        /* ========== 主内容区 ========== */
        .main-content {
            flex: 1;
            min-width: 0;
            background: var(--color-bg);
        }

        /* ========== 分类Banner ========== */
        .category-banner {
            position: relative;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            padding: 60px 40px;
            color: #fff;
            overflow: hidden;
        }
        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,23,42,0.88) 0%, rgba(15,23,42,0.65) 60%, rgba(26,86,219,0.45) 100%);
            z-index: 1;
        }
        .category-banner-content {
            position: relative;
            z-index: 2;
            max-width: 900px;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.75);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: rgba(255,255,255,0.85);
            transition: color var(--transition-base);
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .breadcrumb .sep {
            color: rgba(255,255,255,0.4);
            font-size: 0.7rem;
        }
        .breadcrumb .current {
            color: #fff;
            font-weight: 500;
        }
        .category-banner h1 {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: 0.02em;
            line-height: 1.3;
        }
        .category-banner .category-desc {
            font-size: 1.05rem;
            color: rgba(255,255,255,0.8);
            max-width: 650px;
            line-height: 1.6;
        }
        .category-banner .category-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            margin-top: 16px;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.7);
        }
        .category-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        /* ========== 内容区容器 ========== */
        .content-wrapper {
            max-width: 1100px;
            margin: 0 auto;
            padding: 32px 36px;
        }

        /* ========== 筛选栏 ========== */
        .filter-bar {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 28px;
            padding: 18px 20px;
            background: var(--color-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
        }
        .filter-bar .search-box {
            display: flex;
            align-items: center;
            gap: 0;
            flex: 1;
            min-width: 220px;
            max-width: 400px;
        }
        .filter-bar .search-box input {
            flex: 1;
            border-radius: var(--radius-sm) 0 0 var(--radius-sm);
            border-right: none;
        }
        .filter-bar .search-box button {
            background: var(--color-primary);
            color: #fff;
            padding: 10px 16px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-size: 0.9rem;
            transition: background var(--transition-base);
        }
        .filter-bar .search-box button:hover {
            background: var(--color-primary-hover);
        }
        .filter-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        .filter-tag {
            padding: 7px 14px;
            border-radius: 20px;
            font-size: 0.83rem;
            font-weight: 500;
            background: var(--color-bg);
            color: var(--color-text-secondary);
            border: 1px solid var(--color-border);
            cursor: pointer;
            transition: all var(--transition-base);
            white-space: nowrap;
        }
        .filter-tag:hover {
            background: var(--color-primary-light);
            color: var(--color-primary);
            border-color: var(--color-primary);
        }
        .filter-tag.active {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
            font-weight: 600;
        }
        .filter-sort {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            color: var(--color-text-secondary);
            margin-left: auto;
            flex-shrink: 0;
        }
        .filter-sort select {
            padding: 7px 10px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            font-size: 0.85rem;
            background: var(--color-white);
            color: var(--color-text);
            cursor: pointer;
        }

        /* ========== 文章卡片网格 ========== */
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
            margin-bottom: 32px;
        }
        .article-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
        }
        .article-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: var(--color-border);
        }
        .article-card .card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
            background: #e8ecf1;
        }
        .article-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .article-card:hover .card-img-wrap img {
            transform: scale(1.04);
        }
        .article-card .card-img-wrap .card-tag-top {
            position: absolute;
            top: 10px;
            left: 10px;
            background: var(--color-primary);
            color: #fff;
            font-size: 0.72rem;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 4px;
            letter-spacing: 0.03em;
        }
        .article-card .card-body {
            padding: 16px 18px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .article-card .card-body h3 {
            font-size: 1.02rem;
            font-weight: 600;
            line-height: 1.45;
            margin-bottom: 8px;
            color: var(--color-text);
            transition: color var(--transition-base);
        }
        .article-card:hover .card-body h3 {
            color: var(--color-primary);
        }
        .article-card .card-body .card-excerpt {
            font-size: 0.85rem;
            color: var(--color-text-secondary);
            line-height: 1.55;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 12px;
            padding-top: 10px;
            border-top: 1px solid var(--color-border-light);
            font-size: 0.78rem;
            color: var(--color-text-weak);
        }
        .article-card .card-footer .card-date {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .article-card .card-footer .card-views {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        /* ========== 分页 ========== */
        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            flex-wrap: wrap;
            padding: 10px 0 30px;
        }
        .pagination a,
        .pagination span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 38px;
            height: 38px;
            padding: 0 10px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            transition: all var(--transition-base);
            border: 1px solid var(--color-border);
            background: var(--color-white);
            color: var(--color-text);
        }
        .pagination a:hover {
            background: var(--color-primary-light);
            border-color: var(--color-primary);
            color: var(--color-primary);
        }
        .pagination .current {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
            font-weight: 600;
            box-shadow: 0 2px 6px rgba(26,86,219,0.3);
        }
        .pagination .dots {
            border: none;
            background: transparent;
            color: var(--color-text-weak);
        }

        /* ========== CTA板块 ========== */
        .cta-section {
            background: linear-gradient(135deg, #0f172a 0%, #1a3a5c 50%, #1a56db 100%);
            border-radius: var(--radius-xl);
            padding: 44px 40px;
            text-align: center;
            color: #fff;
            margin-bottom: 24px;
            position: relative;
            overflow: hidden;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 360px;
            height: 360px;
            background: rgba(255,255,255,0.03);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section h3 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }
        .cta-section p {
            font-size: 1rem;
            color: rgba(255,255,255,0.8);
            margin-bottom: 22px;
            position: relative;
            z-index: 1;
        }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            color: var(--color-primary);
            padding: 13px 30px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition-base);
            position: relative;
            z-index: 1;
            box-shadow: 0 4px 16px rgba(0,0,0,0.2);
        }
        .cta-section .btn-cta:hover {
            background: #f0f4ff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0,0,0,0.3);
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 44px 36px 24px;
            margin-top: 0;
        }
        .site-footer .container {
            max-width: 1100px;
            margin: 0 auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 28px;
        }
        .footer-brand h4 {
            color: #fff;
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .footer-brand p {
            font-size: 0.85rem;
            line-height: 1.6;
            color: #94a3b8;
        }
        .footer-links h5 {
            color: #fff;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 12px;
        }
        .footer-links ul {
            list-style: none;
            padding: 0;
        }
        .footer-links ul li {
            margin-bottom: 7px;
        }
        .footer-links ul li a {
            font-size: 0.85rem;
            color: #94a3b8;
            transition: color var(--transition-base);
        }
        .footer-links ul li a:hover {
            color: #fff;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 18px;
            text-align: center;
            font-size: 0.8rem;
            color: #64748b;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1200px) {
            .articles-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
            .content-wrapper {
                padding: 28px 24px;
            }
        }

        @media (max-width: 1024px) {
            :root {
                --nav-width: 220px;
            }
            .articles-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .category-banner {
                padding: 44px 28px;
            }
            .category-banner h1 {
                font-size: 1.8rem;
            }
            .content-wrapper {
                padding: 24px 20px;
            }
            .filter-bar {
                flex-wrap: wrap;
                gap: 10px;
            }
            .filter-bar .search-box {
                max-width: 100%;
                flex: 1 1 100%;
            }
            .filter-sort {
                margin-left: 0;
            }
        }

        @media (max-width: 768px) {
            body {
                flex-direction: column;
            }
            .site-nav {
                width: 100%;
                min-width: 100%;
                height: auto;
                position: sticky;
                top: 0;
                flex-direction: row;
                align-items: center;
                justify-content: space-between;
                padding: 0 16px;
                flex-wrap: wrap;
                overflow-y: visible;
                border-right: none;
                border-bottom: 1px solid rgba(255,255,255,0.08);
            }
            .nav-brand {
                padding: 12px 0;
                border-bottom: none;
                flex-shrink: 0;
            }
            .nav-logo {
                font-size: 0.95rem;
                gap: 8px;
            }
            .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 0.85rem;
            }
            .nav-menu {
                flex-direction: row;
                padding: 8px 0;
                gap: 2px;
                flex: 0 0 auto;
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
            }
            .nav-menu a {
                padding: 8px 12px;
                font-size: 0.82rem;
                white-space: nowrap;
                border-radius: 20px;
            }
            .nav-menu a i {
                font-size: 0.78rem;
                width: auto;
            }
            .nav-footer {
                display: none;
            }
            .mobile-nav-toggle {
                display: block;
            }
            .articles-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .category-banner {
                padding: 32px 18px;
            }
            .category-banner h1 {
                font-size: 1.5rem;
            }
            .category-banner .category-desc {
                font-size: 0.9rem;
            }
            .content-wrapper {
                padding: 18px 14px;
            }
            .filter-bar {
                padding: 12px 14px;
                border-radius: var(--radius-md);
            }
            .cta-section {
                padding: 28px 20px;
                border-radius: var(--radius-lg);
            }
            .cta-section h3 {
                font-size: 1.3rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }
            .site-footer {
                padding: 28px 16px 20px;
            }
            .pagination a,
            .pagination span {
                min-width: 32px;
                height: 32px;
                font-size: 0.82rem;
            }
        }

        @media (max-width: 520px) {
            .site-nav {
                padding: 0 10px;
            }
            .nav-menu a {
                padding: 6px 10px;
                font-size: 0.76rem;
            }
            .nav-logo {
                font-size: 0.85rem;
            }
            .logo-icon {
                width: 26px;
                height: 26px;
                font-size: 0.75rem;
            }
            .category-banner {
                padding: 24px 14px;
            }
            .category-banner h1 {
                font-size: 1.3rem;
            }
            .category-banner .category-desc {
                font-size: 0.82rem;
            }
            .breadcrumb {
                font-size: 0.75rem;
            }
            .content-wrapper {
                padding: 14px 10px;
            }
            .filter-bar {
                padding: 10px;
                gap: 8px;
            }
            .filter-tag {
                padding: 5px 10px;
                font-size: 0.75rem;
            }
            .cta-section {
                padding: 22px 16px;
            }
            .cta-section h3 {
                font-size: 1.15rem;
            }
            .cta-section p {
                font-size: 0.85rem;
            }
            .article-card .card-body h3 {
                font-size: 0.92rem;
            }
        }