/* roulang page: index */
/* ===== Design Variables ===== */
    :root {
        --primary: #1a2a6c;
        --primary-light: #2d4373;
        --primary-dark: #0f1a3a;
        --accent: #e8a838;
        --accent-light: #f0c060;
        --accent-dark: #c98a20;
        --bg: #f8f9fc;
        --bg-white: #ffffff;
        --bg-dark: #0f1a3a;
        --text: #1e293b;
        --text-light: #64748b;
        --text-white: #ffffff;
        --border: #e2e8f0;
        --radius: 16px;
        --radius-sm: 10px;
        --radius-xs: 6px;
        --shadow: 0 4px 24px rgba(26,42,108,0.08);
        --shadow-hover: 0 12px 40px rgba(26,42,108,0.16);
        --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
        --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
        --container: 1200px;
        --gap: 32px;
        --gap-sm: 20px;
    }

    /* ===== 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);
    }
    a { color: var(--primary); text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--accent); }
    img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
    ul, ol { list-style: none; }
    button, input, textarea { font-family: inherit; font-size: 1rem; border: none; outline: none; }
    button { cursor: pointer; background: none; }
    h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--primary-dark); }
    h1 { font-size: 2.8rem; }
    h2 { font-size: 2.2rem; margin-bottom: 1rem; }
    h3 { font-size: 1.4rem; margin-bottom: 0.6rem; }
    p { margin-bottom: 1rem; color: var(--text-light); }

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

    /* ===== Buttons ===== */
    .btn {
        display: inline-flex; align-items: center; gap: 8px;
        padding: 14px 32px; border-radius: var(--radius-sm);
        font-weight: 600; font-size: 1rem;
        transition: var(--transition); border: 2px solid transparent;
    }
    .btn-primary { background: var(--accent); color: var(--primary-dark); border-color: var(--accent); }
    .btn-primary:hover { background: var(--accent-light); color: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(232,168,56,0.35); }
    .btn-outline { background: transparent; color: var(--text-white); border-color: var(--text-white); }
    .btn-outline:hover { background: var(--text-white); color: var(--primary); transform: translateY(-2px); }
    .btn-dark { background: var(--primary-dark); color: var(--text-white); border-color: var(--primary-dark); }
    .btn-dark:hover { background: var(--primary); color: var(--text-white); transform: translateY(-2px); box-shadow: var(--shadow-hover); }
    .btn-sm { padding: 10px 20px; font-size: 0.9rem; }

    /* ===== Badge / Tag ===== */
    .badge {
        display: inline-block; padding: 4px 14px; border-radius: 50px;
        font-size: 0.8rem; font-weight: 600; letter-spacing: 0.3px;
        background: rgba(232,168,56,0.15); color: var(--accent-dark);
    }
    .badge-primary { background: rgba(26,42,108,0.1); color: var(--primary); }
    .badge-light { background: rgba(255,255,255,0.2); color: var(--text-white); }

    /* ===== Card ===== */
    .card {
        background: var(--bg-white); border-radius: var(--radius);
        box-shadow: var(--shadow); overflow: hidden;
        transition: var(--transition); border: 1px solid var(--border);
    }
    .card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
    .card-img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
    .card-body { padding: 24px; }
    .card-title { font-size: 1.2rem; font-weight: 700; color: var(--primary-dark); margin-bottom: 8px; }
    .card-text { font-size: 0.95rem; color: var(--text-light); margin-bottom: 12px; }
    .card-meta { display: flex; align-items: center; gap: 16px; font-size: 0.85rem; color: var(--text-light); }

    /* ===== Section ===== */
    .section { padding: 80px 0; }
    .section-dark { background: var(--bg-dark); color: var(--text-white); }
    .section-dark h2, .section-dark h3 { color: var(--text-white); }
    .section-dark p { color: rgba(255,255,255,0.75); }
    .section-accent { background: linear-gradient(135deg, var(--primary-dark), var(--primary)); }
    .section-header { text-align: center; max-width: 720px; margin: 0 auto 48px; }
    .section-header h2 { margin-bottom: 12px; }
    .section-header p { font-size: 1.1rem; }

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

    /* ===== Header / Nav ===== */
    .header {
        background: var(--bg-white); border-bottom: 1px solid var(--border);
        position: sticky; top: 0; z-index: 1000;
        box-shadow: 0 2px 12px rgba(0,0,0,0.04);
    }
    .header-inner {
        display: flex; align-items: center; justify-content: space-between;
        padding: 16px var(--gap); max-width: var(--container); margin: 0 auto;
    }
    .logo { font-size: 1.5rem; font-weight: 800; color: var(--primary); letter-spacing: -0.5px; }
    .logo span { color: var(--accent); }
    .logo:hover { color: var(--primary); opacity: 0.85; }
    .nav { display: flex; align-items: center; gap: 8px; }
    .nav a {
        padding: 8px 18px; border-radius: var(--radius-xs);
        font-weight: 500; color: var(--text); font-size: 0.95rem;
        transition: var(--transition);
    }
    .nav a:hover { background: rgba(26,42,108,0.06); color: var(--primary); }
    .nav a.active { background: var(--primary); color: var(--text-white); }
    .nav-cta { margin-left: 12px; }
    .nav-cta .btn { padding: 10px 24px; font-size: 0.9rem; }
    .mobile-toggle { display: none; font-size: 1.6rem; color: var(--primary); background: none; border: none; padding: 4px; }
    @media (max-width: 768px) {
        .nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: var(--bg-white); flex-direction: column; padding: 20px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow); }
        .nav.open { display: flex; }
        .mobile-toggle { display: block; }
        .nav-cta { margin-left: 0; margin-top: 8px; }
        .header-inner { flex-wrap: wrap; }
    }

    /* ===== Hero ===== */
    .hero {
        position: relative; min-height: 80vh; display: flex; align-items: center;
        background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, #1a3a5c 100%);
        overflow: hidden;
    }
    .hero-bg {
        position: absolute; inset: 0; z-index: 0;
        background-image: url('/assets/images/backpic/back-1.png');
        background-size: cover; background-position: center; opacity: 0.25;
        mix-blend-mode: overlay;
    }
    .hero .container { position: relative; z-index: 1; width: 100%; }
    .hero-content { max-width: 680px; padding: 40px 0; }
    .hero h1 { color: var(--text-white); font-size: 3.4rem; line-height: 1.15; margin-bottom: 20px; }
    .hero h1 span { color: var(--accent); }
    .hero p { color: rgba(255,255,255,0.8); font-size: 1.2rem; margin-bottom: 32px; max-width: 540px; }
    .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
    .hero-stats { display: flex; gap: 40px; margin-top: 48px; padding-top: 32px; border-top: 1px solid rgba(255,255,255,0.15); }
    .hero-stat h3 { color: var(--accent); font-size: 2rem; margin-bottom: 2px; }
    .hero-stat p { color: rgba(255,255,255,0.6); font-size: 0.9rem; margin-bottom: 0; }
    @media (max-width: 768px) {
        .hero { min-height: 60vh; }
        .hero h1 { font-size: 2.2rem; }
        .hero p { font-size: 1rem; }
        .hero-stats { gap: 20px; flex-wrap: wrap; }
        .hero-stat h3 { font-size: 1.5rem; }
    }

    /* ===== Features / 核心板块 ===== */
    .features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gap); }
    .feature-card {
        background: var(--bg-white); padding: 32px 28px; border-radius: var(--radius);
        box-shadow: var(--shadow); border: 1px solid var(--border);
        transition: var(--transition); text-align: center;
    }
    .feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
    .feature-icon { width: 64px; height: 64px; margin: 0 auto 20px; background: rgba(232,168,56,0.1); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.8rem; color: var(--accent); }
    .feature-card h3 { margin-bottom: 10px; }
    .feature-card p { font-size: 0.95rem; margin-bottom: 0; }
    @media (max-width: 768px) { .features-grid { grid-template-columns: 1fr; } }

    /* ===== Category Tabs ===== */
    .category-tabs { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 40px; }
    .category-tab {
        padding: 10px 28px; border-radius: 50px; font-weight: 600; font-size: 0.95rem;
        background: var(--bg-white); border: 1px solid var(--border);
        color: var(--text); transition: var(--transition); cursor: pointer;
    }
    .category-tab:hover { border-color: var(--accent); color: var(--accent-dark); background: rgba(232,168,56,0.05); }
    .category-tab.active { background: var(--accent); color: var(--primary-dark); border-color: var(--accent); }

    /* ===== Data / Stats ===== */
    .data-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--gap); text-align: center; }
    .data-item { padding: 24px; }
    .data-item .num { font-size: 2.8rem; font-weight: 800; color: var(--accent); line-height: 1.2; }
    .data-item .label { font-size: 1rem; color: var(--text-light); margin-top: 6px; }
    @media (max-width: 768px) { .data-grid { grid-template-columns: 1fr 1fr; } }

    /* ===== Timeline / Process ===== */
    .timeline { position: relative; padding-left: 40px; max-width: 720px; margin: 0 auto; }
    .timeline::before { content: ''; position: absolute; left: 16px; top: 0; bottom: 0; width: 3px; background: var(--accent); border-radius: 3px; }
    .timeline-item { position: relative; padding-bottom: 36px; }
    .timeline-item:last-child { padding-bottom: 0; }
    .timeline-dot { position: absolute; left: -32px; top: 4px; width: 20px; height: 20px; background: var(--accent); border-radius: 50%; border: 4px solid var(--bg-white); box-shadow: 0 0 0 3px var(--accent); }
    .timeline-item h4 { font-size: 1.2rem; color: var(--primary-dark); }
    .timeline-item p { font-size: 0.95rem; margin-bottom: 0; }

    /* ===== FAQ ===== */
    .faq-list { max-width: 800px; margin: 0 auto; }
    .faq-item { border-bottom: 1px solid var(--border); padding: 20px 0; }
    .faq-question { display: flex; justify-content: space-between; align-items: center; cursor: pointer; font-weight: 600; font-size: 1.05rem; color: var(--primary-dark); transition: var(--transition); }
    .faq-question:hover { color: var(--accent-dark); }
    .faq-question i { transition: var(--transition); color: var(--accent); }
    .faq-item.open .faq-question i { transform: rotate(180deg); }
    .faq-answer { max-height: 0; overflow: hidden; transition: var(--transition); padding-top: 0; }
    .faq-item.open .faq-answer { max-height: 300px; padding-top: 16px; }
    .faq-answer p { margin-bottom: 0; font-size: 0.95rem; }

    /* ===== CTA ===== */
    .cta-section { background: linear-gradient(135deg, var(--primary-dark), var(--primary)); padding: 80px 0; text-align: center; }
    .cta-section h2 { color: var(--text-white); font-size: 2.4rem; margin-bottom: 12px; }
    .cta-section p { color: rgba(255,255,255,0.8); font-size: 1.1rem; max-width: 600px; margin: 0 auto 28px; }

    /* ===== Footer ===== */
    .footer { background: var(--bg-dark); color: rgba(255,255,255,0.7); padding: 60px 0 30px; }
    .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--gap); margin-bottom: 40px; }
    .footer-brand .logo { color: var(--text-white); font-size: 1.4rem; display: inline-block; margin-bottom: 12px; }
    .footer-brand .logo span { color: var(--accent); }
    .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.5); max-width: 300px; }
    .footer h4 { color: var(--text-white); font-size: 1rem; margin-bottom: 16px; }
    .footer a { color: rgba(255,255,255,0.6); font-size: 0.9rem; display: block; margin-bottom: 10px; }
    .footer a:hover { color: var(--accent); }
    .footer-social { display: flex; gap: 14px; margin-top: 16px; }
    .footer-social a { width: 40px; height: 40px; border-radius: 50%; background: rgba(255,255,255,0.08); display: flex; align-items: center; justify-content: center; color: var(--text-white); font-size: 1.1rem; transition: var(--transition); margin-bottom: 0; }
    .footer-social a:hover { background: var(--accent); color: var(--primary-dark); }
    .footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding-top: 24px; text-align: center; font-size: 0.85rem; color: rgba(255,255,255,0.35); }
    .footer-bottom a { color: rgba(255,255,255,0.35); display: inline; margin-bottom: 0; }
    .footer-bottom a:hover { color: var(--accent); }
    @media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
    @media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }

    /* ===== Article List ===== */
    .article-list { display: grid; grid-template-columns: 1fr 1fr; gap: var(--gap); }
    @media (max-width: 768px) { .article-list { grid-template-columns: 1fr; } }

    /* ===== cms list empty ===== */
    .empty-state { text-align: center; padding: 48px 20px; color: var(--text-light); font-size: 1.05rem; background: var(--bg-white); border-radius: var(--radius); border: 1px dashed var(--border); }

    /* ===== Responsive extras ===== */
    @media (max-width: 520px) {
        .hero h1 { font-size: 1.8rem; }
        h2 { font-size: 1.6rem; }
        .btn { padding: 12px 24px; font-size: 0.9rem; }
        .section { padding: 48px 0; }
        .hero-actions { flex-direction: column; }
    }

    /* ===== Accessibility ===== */
    a:focus-visible, button:focus-visible, input:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a2a6c;
            --primary-light: #2d4a8e;
            --primary-dark: #0f1a44;
            --secondary: #e63946;
            --secondary-light: #ff5a67;
            --accent: #f4a261;
            --accent-light: #f8c97a;
            --bg-white: #ffffff;
            --bg-light: #f8f9fc;
            --bg-dark: #0f1a44;
            --bg-card: #ffffff;
            --text-dark: #1a1a2e;
            --text-body: #3a3a5c;
            --text-light: #6b6b8a;
            --text-white: #ffffff;
            --border-light: #e8ecf4;
            --border-focus: #2d4a8e;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(26,42,108,0.06);
            --shadow-md: 0 6px 24px rgba(26,42,108,0.10);
            --shadow-lg: 0 16px 48px rgba(26,42,108,0.14);
            --shadow-hover: 0 20px 52px rgba(26,42,108,0.18);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-light);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--secondary); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, select, textarea { font-family: inherit; font-size: inherit; line-height: inherit; }
        h1, h2, h3, h4, h5, h6 { color: var(--text-dark); font-weight: 700; line-height: 1.3; }
        ul, ol { list-style: none; }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 12px 28px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 15px;
            line-height: 1.4;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-align: center;
            justify-content: center;
            background: var(--bg-white);
            color: var(--text-dark);
            box-shadow: var(--shadow-sm);
        }
        .btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
        .btn:focus-visible { outline: 3px solid var(--border-focus); outline-offset: 2px; }
        .btn-primary {
            background: var(--primary);
            color: var(--text-white);
            box-shadow: 0 4px 14px rgba(26,42,108,0.25);
        }
        .btn-primary:hover { background: var(--primary-light); color: var(--text-white); box-shadow: 0 8px 28px rgba(26,42,108,0.35); }
        .btn-secondary {
            background: var(--secondary);
            color: var(--text-white);
            box-shadow: 0 4px 14px rgba(230,57,70,0.25);
        }
        .btn-secondary:hover { background: var(--secondary-light); color: var(--text-white); box-shadow: 0 8px 28px rgba(230,57,70,0.35); }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
            box-shadow: none;
        }
        .btn-outline:hover { background: var(--primary); color: var(--text-white); border-color: var(--primary); }
        .btn-sm { padding: 8px 20px; font-size: 13px; border-radius: var(--radius-sm); }
        .btn-lg { padding: 16px 36px; font-size: 17px; border-radius: var(--radius-lg); }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.3px;
            text-transform: uppercase;
            background: var(--border-light);
            color: var(--text-light);
        }
        .badge-primary { background: rgba(26,42,108,0.10); color: var(--primary); }
        .badge-secondary { background: rgba(230,57,70,0.10); color: var(--secondary); }
        .badge-accent { background: rgba(244,162,97,0.15); color: #b87333; }

        /* ===== Header & Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-light);
            height: var(--header-height);
            transition: background var(--transition);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 24px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
            transition: opacity var(--transition);
        }
        .logo:hover { opacity: 0.85; color: var(--primary); }
        .logo span { color: var(--secondary); font-weight: 700; }
        .nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav a {
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-body);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav a:hover { background: rgba(26,42,108,0.06); color: var(--primary); }
        .nav a.active {
            background: var(--primary);
            color: var(--text-white);
            font-weight: 600;
        }
        .nav a.active:hover { background: var(--primary-light); color: var(--text-white); }
        .nav-cta { margin-left: 12px; }
        .nav-cta .btn { padding: 8px 22px; font-size: 13px; border-radius: 50px; }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 26px;
            color: var(--text-dark);
            cursor: pointer;
            padding: 4px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .nav-toggle:hover { background: var(--border-light); }

        /* ===== Hero / Banner ===== */
        .page-hero {
            position: relative;
            padding: 140px 0 80px;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            min-height: 340px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,26,68,0.88) 0%, rgba(26,42,108,0.72) 100%);
            z-index: 1;
        }
        .page-hero .container { position: relative; z-index: 2; }
        .page-hero h1 {
            font-size: 44px;
            color: var(--text-white);
            margin-bottom: 16px;
            max-width: 720px;
            letter-spacing: -0.5px;
        }
        .page-hero p {
            font-size: 18px;
            color: rgba(255,255,255,0.85);
            max-width: 620px;
            line-height: 1.7;
            margin-bottom: 8px;
        }
        .page-hero .badge {
            background: rgba(255,255,255,0.15);
            color: var(--text-white);
            margin-bottom: 20px;
        }

        /* ===== Main Content ===== */
        .main { padding: 0 0 60px; }

        /* ===== Section ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt { background: var(--bg-white); }
        .section-dark { background: var(--bg-dark); color: var(--text-white); }
        .section-dark h2, .section-dark h3, .section-dark h4 { color: var(--text-white); }
        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header h2 {
            font-size: 34px;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-header p {
            font-size: 17px;
            color: var(--text-light);
            max-width: 640px;
            margin: 0 auto;
        }
        .section-header .badge { margin-bottom: 16px; }

        /* ===== Card ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: transparent; }
        .card-img { width: 100%; aspect-ratio: 16/10; object-fit: cover; display: block; }
        .card-body { padding: 24px; }
        .card-body h3 { font-size: 18px; margin-bottom: 8px; }
        .card-body p { font-size: 14px; color: var(--text-light); line-height: 1.6; margin-bottom: 14px; }
        .card-body .meta { display: flex; align-items: center; gap: 12px; font-size: 13px; color: var(--text-light); }
        .card-body .meta i { width: 16px; color: var(--primary); }

        /* ===== Grid ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        /* ===== Featured List ===== */
        .feature-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .feature-item {
            display: flex;
            gap: 18px;
            align-items: flex-start;
            padding: 24px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .feature-item:hover { box-shadow: var(--shadow-md); border-color: transparent; }
        .feature-icon {
            flex-shrink: 0;
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary);
            background: rgba(26,42,108,0.08);
        }
        .feature-item h4 { font-size: 16px; margin-bottom: 4px; }
        .feature-item p { font-size: 14px; color: var(--text-light); line-height: 1.6; }

        /* ===== Timeline / Process ===== */
        .timeline {
            position: relative;
            padding-left: 40px;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 14px;
            top: 0;
            bottom: 0;
            width: 3px;
            background: linear-gradient(to bottom, var(--primary), var(--secondary));
            border-radius: 6px;
        }
        .timeline-item {
            position: relative;
            padding-bottom: 40px;
            padding-left: 20px;
        }
        .timeline-item:last-child { padding-bottom: 0; }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -30px;
            top: 6px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: var(--primary);
            border: 4px solid var(--bg-light);
            box-shadow: 0 0 0 3px var(--primary);
        }
        .timeline-item h4 { font-size: 18px; margin-bottom: 4px; }
        .timeline-item p { font-size: 14px; color: var(--text-light); line-height: 1.6; }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-item { padding: 28px 16px; }
        .stat-number {
            font-size: 42px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            letter-spacing: -1px;
        }
        .stat-label { font-size: 15px; color: var(--text-light); margin-top: 6px; font-weight: 500; }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover { border-color: var(--primary-light); }
        .faq-question {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 24px;
            background: none;
            border: none;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            text-align: left;
            gap: 16px;
            transition: background var(--transition);
        }
        .faq-question:hover { background: rgba(26,42,108,0.03); }
        .faq-question i { transition: transform var(--transition); font-size: 18px; color: var(--primary); }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-box {
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            border-radius: var(--radius-xl);
            padding: 60px 48px;
            text-align: center;
            color: var(--text-white);
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26,42,108,0.92) 0%, rgba(15,26,68,0.85) 100%);
            border-radius: var(--radius-xl);
        }
        .cta-box * { position: relative; z-index: 2; }
        .cta-box h2 { font-size: 34px; color: var(--text-white); margin-bottom: 12px; }
        .cta-box p { font-size: 17px; color: rgba(255,255,255,0.85); max-width: 600px; margin: 0 auto 28px; }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 20px 0 0;
            font-size: 14px;
            color: var(--text-light);
            flex-wrap: wrap;
        }
        .breadcrumb a { color: rgba(255,255,255,0.7); }
        .breadcrumb a:hover { color: var(--text-white); }
        .breadcrumb span { color: rgba(255,255,255,0.9); }
        .breadcrumb i { font-size: 12px; color: rgba(255,255,255,0.5); }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 60px 0 30px;
        }
        .footer .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo { font-size: 22px; margin-bottom: 14px; display: inline-block; color: var(--text-white); }
        .footer-brand .logo span { color: var(--secondary); }
        .footer-brand p { font-size: 14px; line-height: 1.7; margin-bottom: 18px; max-width: 340px; }
        .footer-social { display: flex; gap: 14px; }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255,255,255,0.6);
            font-size: 18px;
            transition: all var(--transition);
        }
        .footer-social a:hover { background: var(--primary); color: var(--text-white); transform: translateY(-3px); }
        .footer h4 { font-size: 16px; color: var(--text-white); margin-bottom: 18px; font-weight: 600; }
        .footer a { display: block; padding: 5px 0; font-size: 14px; color: rgba(255,255,255,0.55); transition: all var(--transition); }
        .footer a:hover { color: var(--text-white); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 24px;
            font-size: 13px;
            text-align: center;
            color: rgba(255,255,255,0.4);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .grid-4 { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .page-hero h1 { font-size: 36px; }
            .section-header h2 { font-size: 30px; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (max-width: 768px) {
            .nav { display: none; }
            .nav.open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(20px);
                padding: 20px 24px;
                border-bottom: 1px solid var(--border-light);
                gap: 8px;
                box-shadow: var(--shadow-lg);
            }
            .nav.open a { width: 100%; text-align: center; padding: 12px; }
            .nav.open .nav-cta { margin-left: 0; width: 100; }
            .nav.open .nav-cta .btn { width: 100%; justify-content: center; }
            .nav-toggle { display: block; }
            .page-hero { padding: 120px 0 60px; min-height: 280px; }
            .page-hero h1 { font-size: 30px; }
            .page-hero p { font-size: 16px; }
            .grid-3, .grid-2 { grid-template-columns: 1fr; }
            .grid-4 { grid-template-columns: 1fr 1fr; }
            .feature-list { grid-template-columns: 1fr; }
            .section { padding: 56px 0; }
            .section-header { margin-bottom: 36px; }
            .section-header h2 { font-size: 26px; }
            .cta-box { padding: 40px 24px; }
            .cta-box h2 { font-size: 26px; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .stat-number { font-size: 34px; }
            .timeline { padding-left: 28px; }
            .timeline-item::before { left: -22px; width: 12px; height: 12px; }
            .breadcrumb { font-size: 13px; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .page-hero h1 { font-size: 24px; }
            .page-hero p { font-size: 14px; }
            .grid-4 { grid-template-columns: 1fr; }
            .btn-lg { padding: 14px 28px; font-size: 15px; }
            .stat-number { font-size: 28px; }
            .feature-item { padding: 16px; }
            .card-body { padding: 16px; }
            .card-body h3 { font-size: 16px; }
            .faq-question { font-size: 14px; padding: 16px 18px; }
            .faq-answer { font-size: 14px; }
            .logo { font-size: 20px; }
        }

        /* ===== Additional Utilities ===== */
        .text-center { text-align: center; }
        .mt-12 { margin-top: 12px; }
        .mt-24 { margin-top: 24px; }
        .mt-40 { margin-top: 40px; }
        .mb-12 { margin-bottom: 12px; }
        .mb-24 { margin-bottom: 24px; }
        .gap-8 { gap: 8px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .flex-wrap { flex-wrap: wrap; }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a2a4a;
            --primary-light: #2c3e6b;
            --primary-dark: #0f1a30;
            --accent: #c9a84c;
            --accent-light: #e0c66a;
            --accent-dark: #a88a2e;
            --bg: #f7f8fa;
            --bg-card: #ffffff;
            --bg-alt: #eef0f4;
            --text: #1e2a3a;
            --text-light: #5a6a7a;
            --text-muted: #8a9aaa;
            --border: #dce0e6;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 18px;
            --shadow: 0 4px 20px rgba(0,0,0,0.06);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
            --transition: 0.25s ease;
            --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --container: 1200px;
            --nav-height: 72px;
        }
        /* ===== Reset / Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent); }
        button, input, textarea { font-family: inherit; }
        ul, ol { list-style: none; }
        /* ===== 容器 ===== */
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container { padding: 0 16px; }
        }
        /* ===== 导航 ===== */
        .header {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            height: var(--nav-height);
            display: flex;
            align-items: center;
            box-shadow: 0 2px 12px rgba(0,0,0,0.04);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .logo {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
            display: flex;
            align-items: center;
            gap: 2px;
        }
        .logo span { color: var(--accent); font-weight: 300; }
        .logo i { color: var(--accent); margin-right: 6px; font-size: 1.4rem; }
        .nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-light);
            transition: all var(--transition);
            position: relative;
        }
        .nav a:hover {
            color: var(--primary);
            background: var(--bg-alt);
        }
        .nav a.active {
            color: var(--primary);
            background: var(--bg-alt);
            font-weight: 600;
        }
        .nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }
        .nav-cta { margin-left: 12px; }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--primary);
            cursor: pointer;
            padding: 4px 8px;
        }
        @media (max-width: 768px) {
            .nav-toggle { display: block; }
            .nav {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: var(--bg-card);
                flex-direction: column;
                padding: 20px 24px;
                gap: 12px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.35s ease;
                z-index: 99;
            }
            .nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav a { width: 100%; text-align: center; padding: 12px; }
            .nav a.active::after { display: none; }
            .nav-cta { margin-left: 0; width: 100%; }
            .nav-cta .btn { width: 100%; justify-content: center; }
        }
        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            line-height: 1.2;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background: var(--primary-light);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(26,42,74,0.25);
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
        }
        .btn-accent:hover {
            background: var(--accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(201,168,76,0.30);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-sm { padding: 8px 18px; font-size: 0.85rem; }
        .btn-lg { padding: 16px 36px; font-size: 1.05rem; border-radius: var(--radius); }
        /* ===== 标签/徽章 ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.78rem;
            font-weight: 600;
            background: var(--bg-alt);
            color: var(--text-light);
            letter-spacing: 0.3px;
        }
        .badge-accent {
            background: rgba(201,168,76,0.15);
            color: var(--accent-dark);
        }
        .badge-primary {
            background: rgba(26,42,74,0.10);
            color: var(--primary);
        }
        /* ===== Hero / 文章标题区 ===== */
        .article-hero {
            position: relative;
            padding: 80px 0 60px;
            background: var(--primary-dark);
            color: #fff;
            overflow: hidden;
            min-height: 300px;
            display: flex;
            align-items: center;
        }
        .article-hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25;
            z-index: 1;
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
            width: 100%;
        }
        .article-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.7);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .article-hero .breadcrumb a {
            color: rgba(255,255,255,0.8);
            transition: color var(--transition);
        }
        .article-hero .breadcrumb a:hover { color: var(--accent); }
        .article-hero .breadcrumb i { font-size: 0.7rem; color: rgba(255,255,255,0.5); }
        .article-hero .badge {
            background: var(--accent);
            color: var(--primary-dark);
            margin-bottom: 16px;
        }
        .article-hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.25;
            max-width: 900px;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .article-hero .meta {
            display: flex;
            align-items: center;
            gap: 24px;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.7);
            flex-wrap: wrap;
        }
        .article-hero .meta i { margin-right: 6px; color: var(--accent); }
        @media (max-width: 768px) {
            .article-hero { padding: 60px 0 40px; min-height: 240px; }
            .article-hero h1 { font-size: 1.8rem; }
            .article-hero .meta { gap: 16px; font-size: 0.82rem; }
        }
        @media (max-width: 520px) {
            .article-hero h1 { font-size: 1.5rem; }
            .article-hero { padding: 40px 0 30px; min-height: 200px; }
        }
        /* ===== 文章正文 ===== */
        .article-main {
            padding: 48px 0 64px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 48px;
        }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            box-shadow: var(--shadow);
        }
        .article-body .content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text);
        }
        .article-body .content p {
            margin-bottom: 1.5em;
        }
        .article-body .content h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin: 2em 0 0.8em;
            color: var(--primary);
        }
        .article-body .content h3 {
            font-size: 1.2rem;
            font-weight: 600;
            margin: 1.6em 0 0.6em;
            color: var(--primary-light);
        }
        .article-body .content ul,
        .article-body .content ol {
            padding-left: 1.5em;
            margin-bottom: 1.5em;
        }
        .article-body .content li {
            margin-bottom: 0.5em;
        }
        .article-body .content ul li { list-style: disc; }
        .article-body .content ol li { list-style: decimal; }
        .article-body .content blockquote {
            border-left: 4px solid var(--accent);
            padding: 16px 24px;
            margin: 1.5em 0;
            background: var(--bg-alt);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-body .content img {
            border-radius: var(--radius);
            margin: 1.5em 0;
            box-shadow: var(--shadow);
        }
        .article-body .content a {
            color: var(--accent-dark);
            text-decoration: underline;
        }
        .article-body .content a:hover { color: var(--primary); }
        .article-body .content .wp-caption { text-align: center; font-size: 0.85rem; color: var(--text-muted); margin-bottom: 1.5em; }
        .article-body .content iframe { max-width: 100%; border-radius: var(--radius); margin: 1.5em 0; }
        .article-body .content table { width: 100%; border-collapse: collapse; margin: 1.5em 0; }
        .article-body .content th, .article-body .content td { padding: 12px 16px; border: 1px solid var(--border); text-align: left; }
        .article-body .content th { background: var(--bg-alt); font-weight: 600; }
        .article-body .content pre { background: var(--primary-dark); color: #e0e0e0; padding: 20px; border-radius: var(--radius-sm); overflow-x: auto; font-size: 0.9rem; margin: 1.5em 0; }
        .article-body .content code { background: var(--bg-alt); padding: 2px 8px; border-radius: 4px; font-size: 0.9em; }
        .article-body .content pre code { background: transparent; padding: 0; }
        /* 文章底部 */
        .article-footer-bar {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }
        .article-tags {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .article-tags .badge {
            background: var(--bg-alt);
            color: var(--text-light);
            cursor: default;
        }
        .article-share {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .article-share a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--bg-alt);
            color: var(--text-light);
            transition: all var(--transition);
            font-size: 1rem;
        }
        .article-share a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        /* 侧边栏 */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 24px;
            box-shadow: var(--shadow);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 18px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--accent);
        }
        .sidebar-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border);
        }
        .sidebar-list li:last-child { border-bottom: none; }
        .sidebar-list a {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            color: var(--text);
            transition: color var(--transition);
        }
        .sidebar-list a:hover { color: var(--accent-dark); }
        .sidebar-list .thumb {
            width: 60px;
            height: 60px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--bg-alt);
        }
        .sidebar-list .info { flex: 1; min-width: 0; }
        .sidebar-list .info .title {
            font-weight: 600;
            font-size: 0.9rem;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .sidebar-list .info .date {
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-top: 4px;
        }
        .sidebar-cta {
            text-align: center;
            padding: 20px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: var(--radius);
            color: #fff;
        }
        .sidebar-cta h4 { font-size: 1.1rem; margin-bottom: 8px; }
        .sidebar-cta p { font-size: 0.85rem; opacity: 0.85; margin-bottom: 16px; }
        .sidebar-cta .btn { background: var(--accent); color: var(--primary-dark); }
        .sidebar-cta .btn:hover { background: var(--accent-light); }
        @media (max-width: 900px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-sidebar { order: -1; display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
            .article-body { padding: 32px 24px; }
        }
        @media (max-width: 520px) {
            .article-sidebar { grid-template-columns: 1fr; }
            .article-body { padding: 24px 16px; }
            .article-body .content { font-size: 0.95rem; }
        }
        /* ===== 推荐文章区块 ===== */
        .related-section {
            padding: 60px 0;
            background: var(--bg-alt);
        }
        .related-section .section-title {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 32px;
            color: var(--primary);
            text-align: center;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all var(--transition);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .related-card .card-img {
            height: 160px;
            background: var(--bg-alt);
            overflow: hidden;
        }
        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .related-card:hover .card-img img { transform: scale(1.05); }
        .related-card .card-body {
            padding: 16px 18px 20px;
        }
        .related-card .card-body .badge {
            margin-bottom: 8px;
        }
        .related-card .card-body h4 {
            font-size: 1rem;
            font-weight: 600;
            line-height: 1.4;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body h4 a { color: var(--text); }
        .related-card .card-body h4 a:hover { color: var(--accent-dark); }
        .related-card .card-body .date {
            font-size: 0.78rem;
            color: var(--text-muted);
        }
        @media (max-width: 900px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 520px) {
            .related-grid { grid-template-columns: 1fr; }
        }
        /* ===== CTA ===== */
        .article-cta {
            padding: 60px 0;
            background: var(--primary);
            color: #fff;
            text-align: center;
        }
        .article-cta h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .article-cta p {
            font-size: 1.05rem;
            opacity: 0.85;
            max-width: 600px;
            margin: 0 auto 28px;
        }
        .article-cta .btn {
            background: var(--accent);
            color: var(--primary-dark);
        }
        .article-cta .btn:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
        }
        @media (max-width: 768px) {
            .article-cta h2 { font-size: 1.4rem; }
            .article-cta p { font-size: 0.95rem; }
        }
        /* ===== 内容未找到 ===== */
        .not-found-box {
            text-align: center;
            padding: 60px 20px;
        }
        .not-found-box i {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .not-found-box h2 {
            font-size: 1.8rem;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .not-found-box p {
            font-size: 1.05rem;
            color: var(--text-light);
            max-width: 500px;
            margin: 0 auto 24px;
        }
        /* ===== 页脚 ===== */
        .footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.8);
            padding: 60px 0 30px;
        }
        .footer .logo { color: #fff; margin-bottom: 12px; }
        .footer .logo span { color: var(--accent); }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            margin-bottom: 20px;
            color: rgba(255,255,255,0.65);
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.08);
            color: rgba(255,255,255,0.7);
            font-size: 1.1rem;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--accent);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }
        .footer h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer a {
            display: block;
            color: rgba(255,255,255,0.65);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: color var(--transition);
        }
        .footer a:hover { color: var(--accent); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.10);
            padding-top: 24px;
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.45);
        }
        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; }
        }
        /* ===== 通用工具 ===== */
        .text-center { text-align: center; }
        .mb-8 { margin-bottom: 8px; }
        .mb-16 { margin-bottom: 16px; }
        .mb-24 { margin-bottom: 24px; }
        .mb-32 { margin-bottom: 32px; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }
        .mt-32 { margin-top: 32px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .gap-8 { gap: 8px; }
        .gap-16 { gap: 16px; }
        /* ===== 响应式微调 ===== */
        @media (max-width: 1024px) {
            :root { --container: 100%; }
            .container { padding: 0 20px; }
        }
        @media (max-width: 768px) {
            .container { padding: 0 16px; }
        }
        /* 加载动画占位 */
        .skeleton {
            background: linear-gradient(90deg, var(--bg-alt) 25%, #f0f2f6 50%, var(--bg-alt) 75%);
            background-size: 200% 100%;
            animation: shimmer 1.5s infinite;
            border-radius: var(--radius-sm);
        }
        @keyframes shimmer {
            0% { background-position: 200% 0; }
            100% { background-position: -200% 0; }
        }