/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #C8102E;
            --primary-dark: #A00D24;
            --primary-light: #E81E3E;
            --secondary: #1A1A2E;
            --secondary-light: #2D2D44;
            --accent-gold: #D4A017;
            --accent-gold-light: #E8B830;
            --bg-light: #F8F6F3;
            --bg-white: #FFFFFF;
            --bg-dark: #0F0F1A;
            --text-dark: #1A1A2E;
            --text-body: #2D2D3A;
            --text-muted: #6B6B7A;
            --text-white: #F5F5F7;
            --border-light: #E8E6E2;
            --border-medium: #D0CECC;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.07);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.10);
            --shadow-glow: 0 0 40px rgba(200,16,46,0.15);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            color: var(--text-body);
            background: var(--bg-light);
            line-height: 1.6;
            font-size: 16px;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, select, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { color: var(--text-dark); font-weight: 700; line-height: 1.25; }
        h1 { font-size: 2.8rem; letter-spacing: -0.02em; }
        h2 { font-size: 2.2rem; letter-spacing: -0.01em; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.2rem; }
        p { margin-bottom: 1rem; }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .section-pad { padding: 80px 0; }
        .section-pad-sm { padding: 48px 0; }

        /* ===== Navigation (SaaS 命令栏风格) ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            height: var(--nav-height);
            background: rgba(255,255,255,0.88);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .site-header.scrolled { box-shadow: var(--shadow-sm); }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .nav-logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-logo i { font-size: 1.2rem; color: var(--accent-gold); }
        .nav-logo:hover { color: var(--primary-dark); }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            color: var(--text-body);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            position: relative;
        }
        .nav-links a:hover { background: rgba(200,16,46,0.06); color: var(--primary); }
        .nav-links a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(200,16,46,0.25);
        }
        .nav-links a.active:hover { background: var(--primary-dark); color: #fff; }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg-light);
            border: 1px solid var(--border-light);
            border-radius: 100px;
            padding: 6px 16px 6px 18px;
            gap: 8px;
            transition: var(--transition);
            min-width: 200px;
        }
        .nav-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(200,16,46,0.10);
            background: #fff;
        }
        .nav-search i { color: var(--text-muted); font-size: 0.9rem; }
        .nav-search input {
            border: none;
            background: transparent;
            outline: none;
            padding: 6px 0;
            font-size: 0.9rem;
            color: var(--text-dark);
            width: 100%;
        }
        .nav-search input::placeholder { color: var(--text-muted); }
        .nav-cta {
            padding: 10px 24px;
            border-radius: 100px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
            border: none;
            transition: var(--transition);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-cta:hover { background: var(--primary-dark); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow-md); }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-dark);
            cursor: pointer;
            padding: 4px;
        }

        /* ===== Hero ===== */
        .hero {
            padding: 140px 0 80px;
            background: linear-gradient(135deg, var(--secondary) 0%, #0F0F1A 50%, #1A0A0A 100%);
            position: relative;
            overflow: hidden;
            min-height: 620px;
            display: flex;
            align-items: center;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.20;
            mix-blend-mode: overlay;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 200px;
            background: linear-gradient(to top, var(--bg-light) 0%, transparent 100%);
        }
        .hero-grid {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .hero-content { max-width: 600px; }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(200,16,46,0.18);
            color: var(--accent-gold-light);
            padding: 6px 18px 6px 14px;
            border-radius: 100px;
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 20px;
            border: 1px solid rgba(212,160,23,0.20);
        }
        .hero-badge i { font-size: 0.8rem; }
        .hero h1 {
            color: #fff;
            font-size: 3.2rem;
            font-weight: 800;
            line-height: 1.15;
            margin-bottom: 16px;
        }
        .hero h1 span { color: var(--accent-gold); }
        .hero p {
            color: rgba(255,255,255,0.75);
            font-size: 1.15rem;
            line-height: 1.7;
            margin-bottom: 28px;
            max-width: 520px;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .btn-hero {
            padding: 14px 34px;
            border-radius: 100px;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            border: none;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-hero:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-lg); }
        .btn-hero-outline {
            padding: 14px 34px;
            border-radius: 100px;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            border: 1.5px solid rgba(255,255,255,0.30);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-hero-outline:hover { border-color: var(--accent-gold); color: var(--accent-gold); background: rgba(212,160,23,0.08); }
        .hero-visual {
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
        }
        .hero-visual img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            max-height: 420px;
            object-fit: cover;
            width: 100%;
            border: 1px solid rgba(255,255,255,0.06);
        }
        .hero-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            margin-top: 32px;
            padding: 20px 24px;
            background: rgba(255,255,255,0.05);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255,255,255,0.06);
        }
        .hero-stat { text-align: center; }
        .hero-stat-num { font-size: 1.6rem; font-weight: 800; color: #fff; }
        .hero-stat-label { font-size: 0.8rem; color: rgba(255,255,255,0.55); }

        /* ===== Section Titles ===== */
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 8px;
        }
        .section-label i { font-size: 0.75rem; }
        .section-title { margin-bottom: 12px; }
        .section-sub { color: var(--text-muted); font-size: 1.1rem; max-width: 600px; margin-bottom: 40px; }

        /* ===== Cards ===== */
        .card-custom {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: var(--transition);
            height: 100%;
        }
        .card-custom:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: transparent; }
        .card-custom .icon-wrap {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            background: rgba(200,16,46,0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .card-custom h4 { margin-bottom: 8px; }
        .card-custom p { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 0; }

        /* ===== Category Card ===== */
        .category-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .category-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: transparent; }
        .category-card img {
            height: 200px;
            width: 100%;
            object-fit: cover;
            border-bottom: 1px solid var(--border-light);
        }
        .category-card-body { padding: 20px 22px 24px; flex: 1; display: flex; flex-direction: column; }
        .category-card-body .tag {
            display: inline-block;
            background: rgba(200,16,46,0.08);
            color: var(--primary);
            padding: 2px 12px;
            border-radius: 100px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 10px;
            width: fit-content;
        }
        .category-card-body h4 { margin-bottom: 8px; font-size: 1.15rem; }
        .category-card-body p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 16px; flex: 1; }
        .category-card-body .btn-outline {
            align-self: flex-start;
            padding: 8px 22px;
            border-radius: 100px;
            border: 1.5px solid var(--primary);
            color: var(--primary);
            font-weight: 600;
            font-size: 0.85rem;
            background: transparent;
            transition: var(--transition);
        }
        .category-card-body .btn-outline:hover { background: var(--primary); color: #fff; }

        /* ===== Feature Cards (cover) ===== */
        .feature-card {
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: transparent; }
        .feature-card img {
            height: 180px;
            width: 100%;
            object-fit: cover;
        }
        .feature-card-body { padding: 20px 22px 24px; flex: 1; display: flex; flex-direction: column; }
        .feature-card-body h4 { margin-bottom: 6px; font-size: 1.1rem; }
        .feature-card-body p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 12px; flex: 1; }
        .feature-card-body .feature-meta { font-size: 0.8rem; color: var(--text-muted); display: flex; align-items: center; gap: 12px; }

        /* ===== CMS List ===== */
        .cms-list-item {
            display: flex;
            align-items: flex-start;
            gap: 18px;
            padding: 18px 0;
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .cms-list-item:last-child { border-bottom: none; }
        .cms-list-item:hover { padding-left: 8px; }
        .cms-list-num {
            flex-shrink: 0;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(200,16,46,0.08);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
        }
        .cms-list-content { flex: 1; min-width: 0; }
        .cms-list-content h5 { font-size: 1rem; margin-bottom: 4px; font-weight: 600; }
        .cms-list-content h5 a { color: var(--text-dark); }
        .cms-list-content h5 a:hover { color: var(--primary); }
        .cms-list-content p { color: var(--text-muted); font-size: 0.85rem; margin-bottom: 4px; }
        .cms-list-meta { font-size: 0.75rem; color: var(--text-muted); display: flex; align-items: center; gap: 12px; }
        .cms-list-meta .badge-cat {
            background: rgba(200,16,46,0.08);
            color: var(--primary);
            padding: 0 10px;
            border-radius: 100px;
            font-weight: 500;
        }
        .cms-empty {
            padding: 32px;
            text-align: center;
            color: var(--text-muted);
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px dashed var(--border-medium);
        }

        /* ===== Quick Links ===== */
        .quick-link-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px 20px;
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .quick-link-item:hover { background: var(--primary); border-color: var(--primary); transform: translateX(4px); }
        .quick-link-item:hover .ql-icon,
        .quick-link-item:hover .ql-text,
        .quick-link-item:hover .ql-arrow { color: #fff; }
        .ql-icon { font-size: 1.3rem; color: var(--primary); transition: var(--transition); width: 32px; text-align: center; }
        .ql-text { flex: 1; font-weight: 500; color: var(--text-dark); transition: var(--transition); }
        .ql-arrow { color: var(--text-muted); transition: var(--transition); }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            text-align: center;
            padding: 32px 16px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .stat-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.1;
            margin-bottom: 4px;
        }
        .stat-label { font-size: 0.9rem; color: var(--text-muted); font-weight: 500; }

        /* ===== FAQ ===== */
        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--border-medium); }
        .faq-question {
            padding: 18px 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            color: var(--text-dark);
            transition: var(--transition);
            user-select: none;
        }
        .faq-question:hover { color: var(--primary); }
        .faq-question i { transition: var(--transition); color: var(--text-muted); font-size: 0.9rem; }
        .faq-question.open i { transform: rotate(180deg); color: var(--primary); }
        .faq-answer {
            padding: 0 22px 18px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-answer.show { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--secondary) 0%, #0F0F1A 50%, #1A0A0A 100%);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 80px 24px;
        }
        .cta-inner h2 { color: #fff; font-size: 2.4rem; margin-bottom: 12px; }
        .cta-inner p { color: rgba(255,255,255,0.65); font-size: 1.1rem; max-width: 560px; margin: 0 auto 28px; }
        .cta-btn {
            padding: 16px 40px;
            border-radius: 100px;
            background: var(--primary);
            color: #fff;
            font-weight: 700;
            font-size: 1.05rem;
            border: none;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .cta-btn:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 20px 50px rgba(200,16,46,0.30); }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.65);
            padding: 48px 0 24px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand .nav-logo { color: #fff; margin-bottom: 12px; }
        .footer-brand p { font-size: 0.9rem; max-width: 320px; color: rgba(255,255,255,0.5); }
        .footer-col h5 { color: #fff; font-size: 0.95rem; margin-bottom: 14px; font-weight: 600; }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.55);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--accent-gold); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.06);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--accent-gold); }

        /* ===== Buttons General ===== */
        .btn { border-radius: 100px; font-weight: 600; padding: 12px 28px; transition: var(--transition); }
        .btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
        .btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); transform: translateY(-1px); box-shadow: var(--shadow-md); }
        .btn-outline-primary { border-color: var(--primary); color: var(--primary); }
        .btn-outline-primary:hover { background: var(--primary); color: #fff; }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero-grid { grid-template-columns: 1fr; gap: 32px; }
            .hero-content { max-width: 100%; }
            .hero h1 { font-size: 2.6rem; }
            .hero-visual img { max-height: 320px; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .nav-links { display: none; }
            .nav-right .nav-search { display: none; }
            .nav-toggle { display: block; }
            .nav-links.mobile-open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(20px);
                padding: 16px 24px 24px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-md);
                gap: 4px;
            }
            .nav-links.mobile-open a { padding: 12px 16px; font-size: 1rem; }
            .hero { padding: 110px 0 56px; min-height: auto; }
            .hero h1 { font-size: 2rem; }
            .hero p { font-size: 1rem; }
            .hero-actions { flex-direction: column; }
            .hero-stats { grid-template-columns: repeat(3, 1fr); padding: 14px 16px; }
            .hero-stat-num { font-size: 1.3rem; }
            .section-pad { padding: 48px 0; }
            h2 { font-size: 1.7rem; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
            .stat-number { font-size: 2rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero h1 { font-size: 1.7rem; }
            .hero-stats { grid-template-columns: repeat(3, 1fr); gap: 8px; padding: 12px; }
            .hero-stat-num { font-size: 1.1rem; }
            .hero-stat-label { font-size: 0.7rem; }
            .stats-grid { grid-template-columns: 1fr 1fr; }
            .cta-inner h2 { font-size: 1.6rem; }
            .nav-logo { font-size: 1.2rem; }
        }

        /* ===== Utilities ===== */
        .text-gold { color: var(--accent-gold); }
        .bg-white { background: var(--bg-white); }
        .bg-light { background: var(--bg-light); }
        .border-radius-md { border-radius: var(--radius-md); }
        .shadow-sm { box-shadow: var(--shadow-sm); }
        .gap-2 { gap: 8px; }
        .gap-3 { gap: 16px; }
        .mt-2 { margin-top: 8px; }
        .mt-3 { margin-top: 16px; }
        .mt-4 { margin-top: 24px; }
        .mb-0 { margin-bottom: 0; }
        .mb-2 { margin-bottom: 8px; }
        .mb-3 { margin-bottom: 16px; }
        .mb-4 { margin-bottom: 24px; }
        .text-center { text-align: center; }
        .d-flex { display: flex; }
        .align-center { align-items: center; }
        .justify-between { justify-content: space-between; }
        .flex-wrap { flex-wrap: wrap; }
        .w-100 { width: 100%; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2c5f8a;
            --primary-dark: #0f2640;
            --accent: #d4a017;
            --accent-light: #e8b828;
            --accent-dark: #b8890a;
            --bg-body: #f8f9fc;
            --bg-card: #ffffff;
            --bg-alt: #edf2f7;
            --bg-dark: #0f2640;
            --text-primary: #1a2a3a;
            --text-secondary: #4a5a6a;
            --text-light: #7a8a9a;
            --text-white: #f0f4f8;
            --border-light: #e2e8f0;
            --border-accent: #d4a017;
            --radius-sm: 0.375rem;
            --radius-md: 0.75rem;
            --radius-lg: 1.25rem;
            --radius-xl: 1.75rem;
            --shadow-sm: 0 2px 8px rgba(26, 58, 92, 0.06);
            --shadow-md: 0 8px 24px rgba(26, 58, 92, 0.08);
            --shadow-lg: 0 16px 48px rgba(26, 58, 92, 0.12);
            --shadow-accent: 0 8px 28px rgba(212, 160, 23, 0.25);
            --spacer: 4rem;
            --spacer-lg: 6rem;
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            font-family: var(--font-sans);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            margin: 0;
            padding: 0;
        }

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

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

        button,
        input,
        textarea {
            font-family: inherit;
            transition: all var(--transition);
        }

        .container {
            max-width: 1200px;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
            margin-left: auto;
            margin-right: auto;
        }

        .section-padding {
            padding-top: var(--spacer);
            padding-bottom: var(--spacer);
        }

        .section-padding-lg {
            padding-top: var(--spacer-lg);
            padding-bottom: var(--spacer-lg);
        }

        /* ===== Typography ===== */
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-primary);
            margin-top: 0;
            margin-bottom: 0.75rem;
        }

        h1 {
            font-size: 2.75rem;
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: 2.1rem;
            letter-spacing: -0.01em;
        }
        h3 {
            font-size: 1.5rem;
        }
        h4 {
            font-size: 1.2rem;
        }
        h5 {
            font-size: 1.05rem;
        }
        p {
            margin-top: 0;
            margin-bottom: 1rem;
            color: var(--text-secondary);
        }
        .text-accent {
            color: var(--accent) !important;
        }
        .text-primary-dark {
            color: var(--primary-dark) !important;
        }
        .text-light {
            color: var(--text-light) !important;
        }

        /* ===== Buttons ===== */
        .btn-custom {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.7rem 1.8rem;
            border-radius: 50rem;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            box-shadow: var(--shadow-sm);
        }

        .btn-primary-custom {
            background: var(--primary);
            color: #fff;
        }
        .btn-primary-custom:hover {
            background: var(--primary-light);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .btn-accent-custom {
            background: var(--accent);
            color: #fff;
        }
        .btn-accent-custom:hover {
            background: var(--accent-light);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: var(--shadow-accent);
        }

        .btn-outline-custom {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
        }
        .btn-outline-custom:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }

        .btn-white-custom {
            background: #fff;
            color: var(--primary);
        }
        .btn-white-custom:hover {
            background: var(--bg-alt);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .btn-sm-custom {
            padding: 0.45rem 1.2rem;
            font-size: 0.85rem;
        }

        /* ===== Badge & Tag ===== */
        .badge-custom {
            display: inline-block;
            padding: 0.3rem 0.9rem;
            border-radius: 50rem;
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--bg-alt);
            color: var(--primary);
            border: 1px solid var(--border-light);
        }

        .badge-accent {
            background: var(--accent);
            color: #fff;
            border: none;
        }

        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
        }
        .tag-item {
            display: inline-block;
            padding: 0.25rem 0.9rem;
            border-radius: 50rem;
            font-size: 0.8rem;
            background: var(--bg-body);
            color: var(--text-secondary);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .tag-item:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* ===== Card ===== */
        .card-custom {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            overflow: hidden;
            height: 100%;
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .card-custom .card-img-top {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-bottom: 1px solid var(--border-light);
        }

        .card-custom .card-body {
            padding: 1.5rem;
        }

        .card-custom .card-title {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .card-custom .card-text {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin-bottom: 1rem;
        }

        .card-custom .card-footer {
            padding: 1rem 1.5rem;
            background: transparent;
            border-top: 1px solid var(--border-light);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        /* ===== Stat ===== */
        .stat-block {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 2rem 1.5rem;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .stat-block:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 0.25rem;
        }
        .stat-label {
            font-size: 0.95rem;
            color: var(--text-secondary);
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            margin-bottom: 1rem;
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            padding: 1.25rem 1.5rem;
            font-weight: 600;
            font-size: 1.02rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            color: var(--text-primary);
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: var(--bg-alt);
        }
        .faq-question i {
            transition: transform var(--transition);
            color: var(--accent);
        }
        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 1.5rem 1.25rem 1.5rem;
            color: var(--text-secondary);
            font-size: 0.95rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
            border-radius: var(--radius-xl);
            padding: 3.5rem 3rem;
            text-align: center;
            color: #fff;
            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: 0.12;
            mix-blend-mode: overlay;
        }
        .cta-section * {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            color: #fff;
            font-size: 2rem;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.05rem;
            max-width: 640px;
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Section Title ===== */
        .section-title {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-title h2 {
            margin-bottom: 0.5rem;
        }
        .section-title p {
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
            color: var(--text-light);
        }
        .section-title .title-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--bg-alt);
            color: var(--accent);
            font-size: 1.3rem;
            margin-bottom: 0.75rem;
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-custom {
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem 0.8rem;
            list-style: none;
            padding: 0;
            margin: 0 0 1.5rem 0;
            font-size: 0.9rem;
        }
        .breadcrumb-custom li+li::before {
            content: '›';
            margin-right: 0.6rem;
            color: var(--text-light);
        }
        .breadcrumb-custom a {
            color: var(--text-light);
        }
        .breadcrumb-custom a:hover {
            color: var(--accent);
        }
        .breadcrumb-custom .active {
            color: var(--primary);
            font-weight: 600;
        }

        /* ===== Hero Banner (inner) ===== */
        .hero-inner {
            position: relative;
            padding: 6rem 0 4rem 0;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
            color: #fff;
            overflow: hidden;
        }
        .hero-inner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .hero-inner .container {
            position: relative;
            z-index: 1;
        }
        .hero-inner h1 {
            color: #fff;
            font-size: 2.6rem;
            font-weight: 800;
            margin-bottom: 0.75rem;
        }
        .hero-inner p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.1rem;
            max-width: 680px;
        }
        .hero-inner .breadcrumb-custom a {
            color: rgba(255, 255, 255, 0.7);
        }
        .hero-inner .breadcrumb-custom .active {
            color: #fff;
        }
        .hero-inner .breadcrumb-custom li+li::before {
            color: rgba(255, 255, 255, 0.5);
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 2px 20px rgba(26, 58, 92, 0.06);
            transition: all var(--transition);
        }

        .nav-inner {
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 1.5rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
            letter-spacing: -0.01em;
            flex-shrink: 0;
        }
        .nav-logo i {
            color: var(--accent);
            font-size: 1.4rem;
        }
        .nav-logo:hover {
            color: var(--primary-light);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            margin: 0 1.5rem;
        }
        .nav-links a {
            display: inline-block;
            padding: 0.45rem 1rem;
            border-radius: 50rem;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-secondary);
            text-decoration: none;
            transition: all var(--transition);
            position: relative;
        }
        .nav-links a:hover {
            color: var(--primary);
            background: var(--bg-alt);
        }
        .nav-links a.active {
            color: #fff;
            background: var(--primary);
            font-weight: 600;
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 1rem;
            flex-shrink: 0;
        }

        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg-alt);
            border-radius: 50rem;
            padding: 0.35rem 1rem 0.35rem 1.2rem;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            min-width: 180px;
        }
        .nav-search:focus-within {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(212, 160, 23, 0.15);
        }
        .nav-search i {
            color: var(--text-light);
            font-size: 0.85rem;
            margin-right: 0.5rem;
        }
        .nav-search input {
            border: none;
            background: transparent;
            outline: none;
            padding: 0.4rem 0;
            font-size: 0.88rem;
            color: var(--text-primary);
            width: 100%;
        }
        .nav-search input::placeholder {
            color: var(--text-light);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            padding: 0.5rem 1.4rem;
            border-radius: 50rem;
            font-size: 0.88rem;
            font-weight: 600;
            background: var(--accent);
            color: #fff;
            text-decoration: none;
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-cta:hover {
            background: var(--accent-light);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: var(--shadow-accent);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.3rem;
            color: var(--primary);
            cursor: pointer;
            padding: 0.25rem 0.5rem;
            border-radius: var(--radius-sm);
        }
        .nav-toggle:hover {
            background: var(--bg-alt);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 3.5rem 0 1.5rem 0;
            margin-top: var(--spacer-lg);
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }
        .site-footer .footer-brand p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.92rem;
            margin-top: 0.75rem;
            max-width: 340px;
        }
        .site-footer .footer-col h5 {
            color: #fff;
            font-weight: 600;
            margin-bottom: 1.25rem;
            font-size: 1rem;
        }
        .site-footer .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            padding: 0.3rem 0;
            text-decoration: none;
            transition: color var(--transition);
        }
        .site-footer .footer-col a:hover {
            color: var(--accent);
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 1.5rem;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .nav-links {
                gap: 0.15rem;
            }
            .nav-links a {
                padding: 0.4rem 0.7rem;
                font-size: 0.85rem;
            }
            .nav-search {
                min-width: 140px;
            }
            .hero-inner h1 {
                font-size: 2.2rem;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 1rem 1.5rem;
                gap: 0.4rem;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-md);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                width: 100%;
                padding: 0.7rem 1rem;
                border-radius: var(--radius-md);
            }

            .nav-toggle {
                display: block;
            }

            .nav-search {
                min-width: 120px;
            }
            .nav-search input {
                width: 80px;
            }

            .nav-cta span {
                display: none;
            }

            .hero-inner {
                padding: 4rem 0 3rem 0;
            }
            .hero-inner h1 {
                font-size: 1.8rem;
            }
            .hero-inner p {
                font-size: 0.98rem;
            }

            h2 {
                font-size: 1.6rem;
            }
            h3 {
                font-size: 1.25rem;
            }

            .cta-section {
                padding: 2.5rem 1.5rem;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }

            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                gap: 0.5rem;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .nav-inner {
                padding: 0 1rem;
                height: 60px;
            }
            .nav-logo {
                font-size: 1rem;
            }
            .nav-logo i {
                font-size: 1.1rem;
            }
            .nav-search {
                min-width: 36px;
                padding: 0.3rem 0.6rem;
            }
            .nav-search input {
                width: 60px;
                font-size: 0.8rem;
            }
            .nav-cta {
                padding: 0.4rem 0.9rem;
                font-size: 0.8rem;
            }
            .nav-cta i {
                margin-right: 0;
            }
            .nav-cta span {
                display: none;
            }

            .hero-inner h1 {
                font-size: 1.5rem;
            }
            .stat-number {
                font-size: 1.8rem;
            }
            .card-custom .card-img-top {
                height: 160px;
            }
            .section-title {
                margin-bottom: 2rem;
            }
        }

        /* ===== Extra Utilities ===== */
        .bg-alt {
            background: var(--bg-alt);
        }
        .bg-white {
            background: #fff;
        }
        .shadow-hover:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .transition-base {
            transition: all var(--transition);
        }
        .gap-1 {
            gap: 0.5rem;
        }
        .gap-2 {
            gap: 1rem;
        }
        .gap-3 {
            gap: 1.5rem;
        }
        .mt-1 {
            margin-top: 0.5rem;
        }
        .mt-2 {
            margin-top: 1rem;
        }
        .mt-3 {
            margin-top: 1.5rem;
        }
        .mb-1 {
            margin-bottom: 0.5rem;
        }
        .mb-2 {
            margin-bottom: 1rem;
        }
        .mb-3 {
            margin-bottom: 1.5rem;
        }

        /* ===== Entry list ===== */
        .entry-item {
            display: flex;
            align-items: flex-start;
            gap: 1.2rem;
            padding: 1.25rem 1.5rem;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            margin-bottom: 1rem;
        }
        .entry-item:hover {
            box-shadow: var(--shadow-sm);
            border-color: var(--accent);
        }
        .entry-item .entry-icon {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: var(--radius-md);
            background: var(--bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--accent);
        }
        .entry-item .entry-content {
            flex: 1;
        }
        .entry-item .entry-content h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 0.2rem;
        }
        .entry-item .entry-content p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 0.3rem;
        }
        .entry-item .entry-content .entry-url {
            font-size: 0.82rem;
            color: var(--primary-light);
            word-break: break-all;
        }
        .entry-item .entry-action {
            flex-shrink: 0;
        }

        /* ===== Info card with image ===== */
        .info-card {
            display: flex;
            align-items: center;
            gap: 2rem;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }
        .info-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .info-card .info-img {
            flex: 0 0 280px;
            height: 220px;
            object-fit: cover;
        }
        .info-card .info-body {
            flex: 1;
            padding: 1.5rem 2rem 1.5rem 0;
        }
        .info-card .info-body h3 {
            margin-bottom: 0.5rem;
        }
        .info-card .info-body p {
            color: var(--text-secondary);
            font-size: 0.95rem;
        }

        @media (max-width: 768px) {
            .info-card {
                flex-direction: column;
            }
            .info-card .info-img {
                flex: unset;
                width: 100%;
                height: 200px;
            }
            .info-card .info-body {
                padding: 0 1.5rem 1.5rem 1.5rem;
            }
            .entry-item {
                flex-wrap: wrap;
            }
            .entry-item .entry-action {
                width: 100%;
                margin-top: 0.5rem;
            }
        }

        @media (max-width: 520px) {
            .info-card .info-img {
                height: 160px;
            }
            .entry-item {
                padding: 1rem 1.2rem;
            }
        }

/* roulang page: article */
:root {
            --primary: #1e3a5f;
            --primary-light: #2a5298;
            --primary-dark: #0f2440;
            --secondary: #d4a843;
            --secondary-light: #e8c46a;
            --secondary-dark: #b8922e;
            --bg-body: #f5f7fa;
            --bg-white: #ffffff;
            --bg-light: #f0f2f6;
            --bg-dark: #0f2440;
            --text-primary: #1a2332;
            --text-body: #2d3748;
            --text-muted: #6b7a8f;
            --text-light: #8899aa;
            --text-white: #f8f9fa;
            --border-color: #e2e8f0;
            --border-light: #edf2f7;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        }
        *, *::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);
            background: var(--bg-body);
            color: var(--text-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-light); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        .container-narrow { max-width: 840px; margin: 0 auto; padding: 0 24px; }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
            box-shadow: 0 1px 0 rgba(0,0,0,0.04);
        }
        .site-header:hover { box-shadow: var(--shadow-sm); }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            height: 68px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.3px;
            white-space: nowrap;
        }
        .nav-logo i { color: var(--secondary); font-size: 1.5rem; }
        .nav-logo:hover { color: var(--primary); opacity: 0.9; }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            margin: 0 20px;
        }
        .nav-links a {
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
            transition: var(--transition);
            position: relative;
        }
        .nav-links a:hover { color: var(--primary); background: rgba(30,58,95,0.06); }
        .nav-links a.active {
            color: var(--primary);
            background: rgba(30,58,95,0.08);
            font-weight: 600;
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 4px;
            background: var(--secondary);
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg-light);
            border-radius: 50px;
            padding: 0 16px;
            border: 1px solid transparent;
            transition: var(--transition);
            min-width: 200px;
        }
        .nav-search:focus-within {
            border-color: var(--secondary);
            background: var(--bg-white);
            box-shadow: 0 0 0 4px rgba(212,168,67,0.12);
        }
        .nav-search i { color: var(--text-light); font-size: 0.9rem; margin-right: 10px; }
        .nav-search input {
            border: none;
            background: transparent;
            padding: 8px 0;
            font-size: 0.9rem;
            color: var(--text-primary);
            outline: none;
            width: 100%;
        }
        .nav-search input::placeholder { color: var(--text-light); }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: 50px;
            background: var(--primary);
            color: #fff;
            font-size: 0.9rem;
            font-weight: 600;
            border: none;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-cta i { font-size: 0.85rem; }
        .nav-cta:hover { background: var(--primary-light); color: #fff; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(30,58,95,0.3); }
        .nav-toggle { display: none; background: none; border: none; font-size: 1.5rem; color: var(--text-primary); cursor: pointer; padding: 4px 8px; border-radius: var(--radius-sm); transition: var(--transition); }
        .nav-toggle:hover { background: var(--bg-light); }
        @media (max-width: 991px) {
            .nav-links, .nav-search { display: none; }
            .nav-toggle { display: block; }
            .nav-inner { height: 60px; }
            .nav-right { gap: 10px; }
            .nav-cta { padding: 8px 16px; font-size: 0.85rem; }
        }
        @media (max-width: 520px) {
            .nav-logo { font-size: 1.1rem; gap: 6px; }
            .nav-logo i { font-size: 1.2rem; }
            .nav-cta span { display: none; }
            .nav-cta { padding: 8px 14px; }
        }
        .mobile-menu-open .nav-links {
            display: flex;
            flex-direction: column;
            position: absolute;
            top: 60px;
            left: 0;
            right: 0;
            background: var(--bg-white);
            padding: 16px 24px;
            border-bottom: 1px solid var(--border-color);
            box-shadow: var(--shadow-lg);
            gap: 4px;
            margin: 0;
        }
        .mobile-menu-open .nav-links a { padding: 12px 18px; width: 100%; border-radius: var(--radius-sm); }
        .mobile-menu-open .nav-search { display: flex; position: absolute; top: 120px; left: 24px; right: 24px; z-index: 10; }

        /* ===== Hero 文章 ===== */
        .article-hero {
            position: relative;
            margin-top: 68px;
            padding: 80px 0 60px;
            background: var(--primary-dark);
            background-image: linear-gradient(135deg, rgba(15,36,64,0.92) 0%, rgba(30,58,95,0.85) 100%), url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(212,168,67,0.12) 0%, transparent 70%);
            pointer-events: none;
        }
        .article-hero .container { position: relative; z-index: 2; }
        .article-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 50px;
            background: rgba(212,168,67,0.2);
            color: var(--secondary-light);
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 20px;
            border: 1px solid rgba(212,168,67,0.25);
        }
        .article-hero .hero-badge i { font-size: 0.75rem; }
        .article-hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.25;
            max-width: 800px;
            letter-spacing: -0.5px;
            margin-bottom: 20px;
        }
        .article-hero .hero-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 20px;
            font-size: 0.95rem;
            color: rgba(255,255,255,0.75);
        }
        .article-hero .hero-meta span { display: flex; align-items: center; gap: 6px; }
        .article-hero .hero-meta i { font-size: 0.85rem; color: var(--secondary); }
        @media (max-width: 768px) {
            .article-hero { padding: 60px 0 40px; margin-top: 60px; min-height: 240px; }
            .article-hero h1 { font-size: 1.8rem; }
            .article-hero .hero-meta { gap: 12px; font-size: 0.85rem; flex-direction: column; align-items: flex-start; }
        }
        @media (max-width: 520px) {
            .article-hero h1 { font-size: 1.5rem; }
            .article-hero { padding: 40px 0 30px; }
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-bar {
            padding: 14px 0;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
        }
        .breadcrumb-bar .breadcrumb {
            background: transparent;
            padding: 0;
            margin: 0;
            font-size: 0.85rem;
        }
        .breadcrumb-bar .breadcrumb-item a { color: var(--text-muted); }
        .breadcrumb-bar .breadcrumb-item a:hover { color: var(--primary); }
        .breadcrumb-bar .breadcrumb-item.active { color: var(--text-primary); font-weight: 500; }
        .breadcrumb-bar .breadcrumb-item + .breadcrumb-item::before { color: var(--text-light); content: '›'; }

        /* ===== 文章正文 ===== */
        .article-main {
            padding: 50px 0 60px;
            background: var(--bg-white);
        }
        .article-content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text-body);
        }
        .article-content h2, .article-content h3, .article-content h4 {
            color: var(--text-primary);
            font-weight: 700;
            margin-top: 40px;
            margin-bottom: 16px;
            letter-spacing: -0.3px;
        }
        .article-content h2 { font-size: 1.7rem; border-bottom: 2px solid var(--border-light); padding-bottom: 12px; }
        .article-content h3 { font-size: 1.35rem; }
        .article-content h4 { font-size: 1.15rem; }
        .article-content p { margin-bottom: 20px; }
        .article-content ul, .article-content ol { margin-bottom: 20px; padding-left: 24px; }
        .article-content li { margin-bottom: 8px; }
        .article-content a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
        .article-content a:hover { color: var(--secondary); }
        .article-content blockquote {
            border-left: 4px solid var(--secondary);
            padding: 16px 24px;
            margin: 24px 0;
            background: var(--bg-light);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-muted);
            font-style: italic;
        }
        .article-content img {
            border-radius: var(--radius-md);
            margin: 30px auto;
            box-shadow: var(--shadow-md);
            max-width: 100%;
        }
        .article-content .img-caption {
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-light);
            margin-top: -16px;
            margin-bottom: 30px;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 0.95rem;
        }
        .article-content th, .article-content td {
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            text-align: left;
        }
        .article-content th { background: var(--bg-light); font-weight: 600; color: var(--text-primary); }
        .article-content td { background: var(--bg-white); }
        .article-content code {
            background: var(--bg-light);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--primary);
        }
        .article-content pre {
            background: var(--bg-dark);
            color: #e2e8f0;
            padding: 20px 24px;
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 24px 0;
            font-size: 0.9rem;
            line-height: 1.6;
        }
        @media (max-width: 768px) {
            .article-content { font-size: 0.98rem; }
            .article-content h2 { font-size: 1.4rem; }
            .article-content h3 { font-size: 1.2rem; }
            .article-main { padding: 30px 0 40px; }
        }

        /* ===== 文章底部信息 ===== */
        .article-footer-info {
            padding: 30px 0;
            border-top: 1px solid var(--border-light);
            margin-top: 40px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .article-tags .tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 6px 14px;
            border-radius: 50px;
            background: var(--bg-light);
            color: var(--text-muted);
            font-size: 0.85rem;
            font-weight: 500;
            transition: var(--transition);
        }
        .article-tags .tag:hover { background: var(--primary); color: #fff; }
        .article-share {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .article-share span { font-size: 0.9rem; color: var(--text-muted); font-weight: 500; }
        .article-share a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--bg-light);
            color: var(--text-muted);
            font-size: 1rem;
            transition: var(--transition);
        }
        .article-share a:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
        @media (max-width: 520px) {
            .article-footer-info { flex-direction: column; align-items: flex-start; }
        }

        /* ===== 相关文章 ===== */
        .related-section {
            padding: 60px 0;
            background: var(--bg-body);
        }
        .related-section .section-title {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .related-section .section-subtitle {
            color: var(--text-muted);
            font-size: 1rem;
            margin-bottom: 32px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }
        .related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
        .related-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
        }
        .related-card .card-body { padding: 20px 24px 24px; }
        .related-card .card-category {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 50px;
            background: rgba(212,168,67,0.12);
            color: var(--secondary-dark);
            font-size: 0.8rem;
            font-weight: 500;
            margin-bottom: 10px;
        }
        .related-card .card-title {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.4;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-title a { color: inherit; }
        .related-card .card-title a:hover { color: var(--primary); }
        .related-card .card-text {
            font-size: 0.9rem;
            color: var(--text-muted);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }
        .related-card .card-meta {
            font-size: 0.82rem;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .related-card .card-meta i { font-size: 0.75rem; }
        @media (max-width: 991px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 520px) {
            .related-grid { grid-template-columns: 1fr; }
            .related-card .card-img { height: 180px; }
            .related-section { padding: 40px 0; }
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 70px 0;
            background: var(--primary-dark);
            background-image: linear-gradient(135deg, rgba(15,36,64,0.95) 0%, rgba(30,58,95,0.9) 100%), url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            text-align: center;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at 70% 30%, rgba(212,168,67,0.1) 0%, transparent 60%);
            pointer-events: none;
        }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255,255,255,0.75);
            max-width: 600px;
            margin: 0 auto 30px;
        }
        .cta-section .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .cta-section .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 50px;
            background: var(--secondary);
            color: var(--primary-dark);
            font-weight: 600;
            font-size: 1rem;
            border: none;
            transition: var(--transition);
        }
        .cta-section .btn-primary-custom:hover { background: var(--secondary-light); transform: translateY(-3px); box-shadow: 0 10px 30px rgba(212,168,67,0.35); color: var(--primary-dark); }
        .cta-section .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 50px;
            background: transparent;
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            border: 2px solid rgba(255,255,255,0.3);
            transition: var(--transition);
        }
        .cta-section .btn-outline-custom:hover { background: rgba(255,255,255,0.1); border-color: #fff; transform: translateY(-3px); }
        @media (max-width: 768px) {
            .cta-section h2 { font-size: 1.6rem; }
            .cta-section { padding: 50px 0; }
            .cta-section .btn-primary-custom, .cta-section .btn-outline-custom { padding: 12px 24px; font-size: 0.9rem; }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 60px 0 0;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .site-footer .footer-brand .nav-logo { color: #fff; font-size: 1.2rem; margin-bottom: 12px; display: inline-flex; }
        .site-footer .footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.55); max-width: 300px; margin-top: 12px; }
        .site-footer .footer-col h5 {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }
        .site-footer .footer-col h5::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 30px;
            height: 2px;
            background: var(--secondary);
            border-radius: 2px;
        }
        .site-footer .footer-col a {
            display: block;
            color: rgba(255,255,255,0.55);
            font-size: 0.9rem;
            padding: 5px 0;
            transition: var(--transition);
        }
        .site-footer .footer-col a:hover { color: var(--secondary-light); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
            flex-wrap: wrap;
            gap: 12px;
        }
        @media (max-width: 991px) {
            .site-footer .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 30px; }
        }
        @media (max-width: 520px) {
            .site-footer .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .site-footer { padding: 40px 0 0; }
        }

        /* ===== 内容未找到 ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 20px;
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
        }
        .not-found-box i { font-size: 3rem; color: var(--text-light); margin-bottom: 20px; }
        .not-found-box h2 { font-size: 1.6rem; color: var(--text-primary); margin-bottom: 12px; }
        .not-found-box p { color: var(--text-muted); margin-bottom: 24px; }
        .not-found-box .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            background: var(--primary);
            color: #fff;
            font-weight: 500;
            transition: var(--transition);
        }
        .not-found-box .btn-back:hover { background: var(--primary-light); color: #fff; transform: translateY(-2px); }

        /* ===== 额外响应式 ===== */
        @media (max-width: 768px) {
            .container { padding: 0 16px; }
            .container-narrow { padding: 0 16px; }
        }

        /* ===== 回到顶部 ===== */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: var(--shadow-lg);
            border: none;
            cursor: pointer;
            transition: var(--transition);
            z-index: 1020;
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
        }
        .back-to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
        .back-to-top:hover { background: var(--primary-light); transform: translateY(-4px); box-shadow: var(--shadow-xl); }