/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #0f2b5c;
            --primary-light: #1a3f7a;
            --primary-dark: #0a1e42;
            --secondary: #d4a02b;
            --secondary-light: #e8bc4a;
            --secondary-dark: #b8891e;
            --accent: #10b981;
            --accent-light: #34d399;
            --bg: #f0f4f9;
            --bg-white: #ffffff;
            --bg-dark: #0a1a32;
            --text: #0f172a;
            --text-light: #475569;
            --text-white: #f1f5f9;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 24px rgba(15, 43, 92, 0.08);
            --shadow-hover: 0 12px 40px rgba(15, 43, 92, 0.16);
            --shadow-glow: 0 0 30px rgba(212, 160, 43, 0.20);
            --transition: all 0.30s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --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-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: 1rem; border: none; outline: none; transition: var(--transition); }
        button { cursor: pointer; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }
        h1 { font-size: clamp(2.2rem, 5.5vw, 3.8rem); }
        h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); }
        h3 { font-size: clamp(1.2rem, 2.2vw, 1.5rem); }
        h4 { font-size: 1.15rem; }
        p { color: var(--text-light); margin-bottom: 0.8rem; }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Utility ===== */
        .section-padding { padding: 80px 0; }
        .section-title { text-align: center; margin-bottom: 48px; }
        .section-title h2 { margin-bottom: 12px; }
        .section-title p { max-width: 640px; margin: 0 auto; font-size: 1.05rem; }
        .section-subtitle { display: inline-block; background: rgba(212, 160, 43, 0.12); color: var(--secondary-dark); padding: 4px 16px; border-radius: 20px; font-size: 0.85rem; font-weight: 600; letter-spacing: 0.5px; margin-bottom: 12px; }
        .badge { display: inline-block; background: var(--secondary); color: #fff; padding: 2px 12px; border-radius: 20px; font-size: 0.75rem; font-weight: 600; }
        .badge-primary { background: var(--primary); }
        .badge-accent { background: var(--accent); }
        .btn {
            display: inline-flex; align-items: center; gap: 8px; padding: 12px 32px; border-radius: 50px; font-weight: 600; font-size: 0.95rem; transition: var(--transition); border: 2px solid transparent; white-space: nowrap;
        }
        .btn-primary { background: var(--secondary); color: #fff; border-color: var(--secondary); }
        .btn-primary:hover { background: var(--secondary-dark); border-color: var(--secondary-dark); transform: translateY(-2px); box-shadow: var(--shadow-glow); }
        .btn-outline { background: transparent; color: #fff; border-color: rgba(255,255,255,0.6); }
        .btn-outline:hover { background: rgba(255,255,255,0.12); border-color: #fff; transform: translateY(-2px); }
        .btn-lg { padding: 16px 44px; font-size: 1.05rem; }
        .btn-sm { padding: 8px 20px; font-size: 0.85rem; }
        .text-center { text-align: center; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .gap-12 { gap: 12px; }
        .gap-24 { gap: 24px; }

        /* ===== Header & Nav ===== */
        .site-header {
            position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
            background: rgba(15, 43, 92, 0.95); backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255,255,255,0.06);
            height: var(--header-height); transition: var(--transition);
        }
        .site-header .container { display: flex; align-items: center; justify-content: space-between; height: 100%; }
        .logo { font-size: 1.35rem; font-weight: 800; color: #fff; letter-spacing: 0.5px; display: flex; align-items: center; gap: 10px; }
        .logo i { color: var(--secondary); font-size: 1.6rem; }
        .logo span { background: linear-gradient(135deg, #f5d98a, #d4a02b); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .nav-list { display: flex; align-items: center; gap: 6px; }
        .nav-list a {
            display: flex; align-items: center; gap: 6px; padding: 8px 18px; border-radius: 40px;
            color: rgba(255,255,255,0.75); font-weight: 500; font-size: 0.92rem; transition: var(--transition);
        }
        .nav-list a:hover { color: #fff; background: rgba(255,255,255,0.08); }
        .nav-list a.active { color: #fff; background: rgba(212, 160, 43, 0.20); box-shadow: inset 0 0 0 1px rgba(212,160,43,0.25); }
        .nav-list a.active i { color: var(--secondary); }
        .nav-cta .btn { padding: 8px 22px; font-size: 0.88rem; background: var(--secondary); color: #fff; border-radius: 40px; }
        .nav-cta .btn:hover { background: var(--secondary-dark); transform: translateY(-1px); box-shadow: var(--shadow-glow); }
        .hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; background: none; border: none; }
        .hamburger span { display: block; width: 26px; height: 2.5px; background: #fff; border-radius: 4px; transition: var(--transition); }
        .mobile-menu { display: none; position: fixed; top: var(--header-height); left: 0; width: 100%; background: rgba(10, 26, 50, 0.98); backdrop-filter: blur(16px); padding: 20px 24px; border-bottom: 1px solid rgba(255,255,255,0.06); z-index: 999; }
        .mobile-menu a { display: block; padding: 14px 16px; color: rgba(255,255,255,0.75); font-weight: 500; border-radius: var(--radius-sm); transition: var(--transition); }
        .mobile-menu a:hover { background: rgba(255,255,255,0.06); color: #fff; }
        .mobile-menu a.active { color: var(--secondary); background: rgba(212,160,43,0.10); }

        /* ===== Hero ===== */
        .hero {
            position: relative; min-height: 88vh; display: flex; align-items: center;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, #0d2847 100%);
            overflow: hidden; padding-top: var(--header-height);
        }
        .hero-bg {
            position: absolute; inset: 0; z-index: 0; opacity: 0.20; mix-blend-mode: overlay;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        }
        .hero-overlay {
            position: absolute; inset: 0; z-index: 1;
            background: radial-gradient(ellipse at 30% 50%, rgba(212,160,43,0.08) 0%, transparent 70%),
                        radial-gradient(ellipse at 70% 30%, rgba(16,185,129,0.05) 0%, transparent 60%);
        }
        .hero .container { position: relative; z-index: 2; width: 100%; }
        .hero-content { max-width: 720px; padding: 40px 0; }
        .hero-badge { display: inline-flex; align-items: center; gap: 8px; background: rgba(212,160,43,0.15); border: 1px solid rgba(212,160,43,0.25); padding: 6px 18px; border-radius: 40px; color: var(--secondary-light); font-size: 0.82rem; font-weight: 600; letter-spacing: 0.3px; margin-bottom: 24px; }
        .hero-badge i { font-size: 0.75rem; }
        .hero h1 { color: #fff; margin-bottom: 16px; letter-spacing: -0.5px; }
        .hero h1 span { background: linear-gradient(135deg, #f5d98a, #d4a02b); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .hero p { font-size: 1.15rem; color: rgba(255,255,255,0.7); max-width: 580px; margin-bottom: 32px; line-height: 1.8; }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 48px; }
        .hero-stats { display: flex; flex-wrap: wrap; gap: 32px 48px; padding-top: 8px; border-top: 1px solid rgba(255,255,255,0.08); }
        .hero-stats .stat-item { text-align: left; }
        .hero-stats .stat-number { font-size: 1.8rem; font-weight: 800; color: #fff; letter-spacing: -0.5px; }
        .hero-stats .stat-number i { color: var(--secondary); font-size: 1.2rem; margin-right: 4px; }
        .hero-stats .stat-label { font-size: 0.82rem; color: rgba(255,255,255,0.5); margin-top: 2px; }

        /* ===== Intro / Features ===== */
        .intro-section { background: var(--bg-white); }
        .features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .feature-card {
            background: var(--bg); padding: 36px 28px; border-radius: var(--radius);
            border: 1px solid var(--border); transition: var(--transition); text-align: center;
        }
        .feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: transparent; }
        .feature-icon { width: 64px; height: 64px; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto 20px; font-size: 1.6rem; color: #fff; }
        .feature-icon.blue { background: linear-gradient(135deg, #1a3f7a, #0f2b5c); }
        .feature-icon.gold { background: linear-gradient(135deg, #e8bc4a, #b8891e); }
        .feature-icon.green { background: linear-gradient(135deg, #34d399, #059669); }
        .feature-card h3 { margin-bottom: 10px; }
        .feature-card p { font-size: 0.92rem; margin-bottom: 0; }

        /* ===== Category Entry ===== */
        .category-section { background: var(--bg); }
        .category-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
        .category-card {
            position: relative; border-radius: var(--radius); overflow: hidden;
            min-height: 280px; display: flex; align-items: flex-end;
            background: var(--primary); transition: var(--transition);
        }
        .category-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0.35; transition: var(--transition); }
        .category-card:hover img { opacity: 0.20; transform: scale(1.04); }
        .category-card .overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(10,26,50,0.85) 0%, transparent 60%); z-index: 1; }
        .category-card .content { position: relative; z-index: 2; padding: 32px 28px; width: 100%; }
        .category-card .content .badge { margin-bottom: 10px; }
        .category-card .content h3 { color: #fff; font-size: 1.4rem; margin-bottom: 6px; }
        .category-card .content p { color: rgba(255,255,255,0.65); font-size: 0.9rem; margin-bottom: 14px; }
        .category-card .content .btn { background: rgba(212,160,43,0.15); border: 1px solid rgba(212,160,43,0.3); color: var(--secondary-light); padding: 8px 22px; border-radius: 40px; font-size: 0.85rem; font-weight: 600; display: inline-flex; align-items: center; gap: 6px; }
        .category-card .content .btn:hover { background: var(--secondary); color: #fff; border-color: var(--secondary); }

        /* ===== Stats / Data ===== */
        .stats-section {
            background: var(--primary-dark); position: relative; overflow: hidden;
            background-image: url('/assets/images/backpic/back-2.png'); background-size: cover; background-position: center; background-blend-mode: overlay;
        }
        .stats-section::before { content: ''; position: absolute; inset: 0; background: rgba(10,26,50,0.75); z-index: 1; }
        .stats-section .container { position: relative; z-index: 2; }
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; text-align: center; }
        .stat-card { padding: 32px 12px; }
        .stat-card .number { font-size: 2.8rem; font-weight: 800; color: #fff; letter-spacing: -1px; display: flex; align-items: center; justify-content: center; gap: 4px; }
        .stat-card .number i { color: var(--secondary); font-size: 1.6rem; }
        .stat-card .label { font-size: 0.92rem; color: rgba(255,255,255,0.6); margin-top: 8px; }

        /* ===== Latest Posts (CMS) ===== */
        .posts-section { background: var(--bg-white); }
        .posts-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
        .post-card {
            display: flex; gap: 20px; background: var(--bg); border-radius: var(--radius);
            padding: 20px; border: 1px solid var(--border); transition: var(--transition); align-items: flex-start;
        }
        .post-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); border-color: transparent; }
        .post-thumb { flex-shrink: 0; width: 160px; height: 120px; border-radius: var(--radius-sm); overflow: hidden; background: var(--border); }
        .post-thumb img { width: 100%; height: 100%; object-fit: cover; }
        .post-info { flex: 1; display: flex; flex-direction: column; gap: 6px; }
        .post-info .post-cat { font-size: 0.75rem; font-weight: 600; color: var(--secondary-dark); background: rgba(212,160,43,0.10); padding: 2px 12px; border-radius: 20px; display: inline-block; width: fit-content; }
        .post-info .post-title { font-size: 1rem; font-weight: 700; color: var(--text); line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .post-info .post-title:hover { color: var(--primary-light); }
        .post-info .post-excerpt { font-size: 0.85rem; color: var(--text-light); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .post-info .post-meta { font-size: 0.78rem; color: var(--text-light); display: flex; align-items: center; gap: 12px; margin-top: auto; }
        .post-info .post-meta i { margin-right: 3px; }
        .posts-empty { grid-column: 1 / -1; text-align: center; padding: 60px 20px; color: var(--text-light); background: var(--bg); border-radius: var(--radius); border: 1px dashed var(--border); }
        .posts-empty i { font-size: 2.4rem; color: var(--border); margin-bottom: 12px; display: block; }

        /* ===== How It Works ===== */
        .steps-section { background: var(--bg); }
        .steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
        .steps-grid::before { content: ''; position: absolute; top: 40px; left: 15%; right: 15%; height: 2px; background: linear-gradient(to right, var(--secondary), var(--primary-light), var(--secondary)); opacity: 0.20; z-index: 0; }
        .step-card { background: var(--bg-white); border-radius: var(--radius); padding: 32px 24px; text-align: center; border: 1px solid var(--border); transition: var(--transition); position: relative; z-index: 1; }
        .step-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
        .step-number { width: 56px; height: 56px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 1.4rem; font-weight: 800; margin: 0 auto 16px; position: relative; z-index: 2; border: 3px solid var(--bg); box-shadow: 0 0 0 3px rgba(212,160,43,0.2); }
        .step-card h3 { font-size: 1.05rem; margin-bottom: 8px; }
        .step-card p { font-size: 0.85rem; margin-bottom: 0; }

        /* ===== FAQ ===== */
        .faq-section { background: var(--bg-white); }
        .faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: var(--transition); background: var(--bg); }
        .faq-item:hover { border-color: rgba(212,160,43,0.2); }
        .faq-question { width: 100%; display: flex; align-items: center; justify-content: space-between; padding: 18px 24px; font-weight: 600; font-size: 0.95rem; color: var(--text); background: none; text-align: left; gap: 16px; }
        .faq-question i { color: var(--secondary); font-size: 0.85rem; transition: var(--transition); flex-shrink: 0; }
        .faq-question.open i { transform: rotate(180deg); }
        .faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.35s ease, padding 0.35s ease; padding: 0 24px; }
        .faq-answer.open { max-height: 300px; padding: 0 24px 20px; }
        .faq-answer p { font-size: 0.9rem; margin-bottom: 0; color: var(--text-light); }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary-dark); position: relative; overflow: hidden;
            background-image: url('/assets/images/backpic/back-3.png'); background-size: cover; background-position: center; background-blend-mode: overlay;
        }
        .cta-section::before { content: ''; position: absolute; inset: 0; background: rgba(10,26,50,0.70); z-index: 1; }
        .cta-section .container { position: relative; z-index: 2; text-align: center; padding: 80px 24px; }
        .cta-section h2 { color: #fff; margin-bottom: 12px; }
        .cta-section p { color: rgba(255,255,255,0.65); max-width: 560px; margin: 0 auto 28px; font-size: 1.05rem; }
        .cta-section .btn { background: var(--secondary); color: #fff; border-color: var(--secondary); }
        .cta-section .btn:hover { background: var(--secondary-dark); border-color: var(--secondary-dark); box-shadow: var(--shadow-glow); }

        /* ===== Footer ===== */
        .site-footer { background: var(--primary-dark); border-top: 1px solid rgba(255,255,255,0.04); padding: 48px 0 28px; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 32px; margin-bottom: 32px; }
        .footer-brand .logo { font-size: 1.2rem; margin-bottom: 12px; }
        .footer-brand p { font-size: 0.85rem; color: rgba(255,255,255,0.45); max-width: 320px; line-height: 1.7; }
        .footer-col h4 { color: #fff; font-size: 0.95rem; margin-bottom: 16px; }
        .footer-col a { display: block; padding: 4px 0; font-size: 0.85rem; color: rgba(255,255,255,0.5); transition: var(--transition); }
        .footer-col a:hover { color: var(--secondary-light); 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; flex-wrap: wrap; gap: 12px; }
        .footer-bottom p { font-size: 0.82rem; color: rgba(255,255,255,0.35); margin-bottom: 0; }
        .footer-bottom-links { display: flex; gap: 20px; }
        .footer-bottom-links a { font-size: 0.82rem; color: rgba(255,255,255,0.35); }
        .footer-bottom-links a:hover { color: var(--secondary-light); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .nav-list { display: none; }
            .hamburger { display: flex; }
            .mobile-menu.open { display: block; }
            :root { --header-height: 64px; }
            .section-padding { padding: 56px 0; }
            .hero { min-height: 70vh; }
            .hero-content { max-width: 100%; }
            .hero h1 { font-size: clamp(1.8rem, 6vw, 2.6rem); }
            .hero p { font-size: 1rem; }
            .hero-stats { gap: 20px 32px; }
            .hero-stats .stat-number { font-size: 1.4rem; }
            .features-grid { grid-template-columns: 1fr; }
            .category-grid { grid-template-columns: 1fr; }
            .category-card { min-height: 220px; }
            .posts-grid { grid-template-columns: 1fr; }
            .post-card { flex-direction: column; }
            .post-thumb { width: 100%; height: 180px; }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid::before { display: none; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .stat-card .number { font-size: 2rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-section .container { padding: 56px 24px; }
            .faq-question { font-size: 0.9rem; padding: 14px 18px; }
            .logo { font-size: 1.1rem; }
            .nav-cta .btn { padding: 6px 16px; font-size: 0.8rem; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero-actions { flex-direction: column; }
            .hero-actions .btn { width: 100%; justify-content: center; }
            .steps-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: 1fr; }
            .post-thumb { height: 140px; }
            .feature-card { padding: 28px 20px; }
            .category-card .content { padding: 24px 20px; }
        }

        /* ===== Animations ===== */
        @keyframes fadeUp { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
        .animate-fade-up { animation: fadeUp 0.6s ease forwards; }
        .delay-100 { animation-delay: 0.1s; }
        .delay-200 { animation-delay: 0.2s; }
        .delay-300 { animation-delay: 0.3s; }

        /* ===== Focus & Accessibility ===== */
        a:focus-visible, button:focus-visible { outline: 3px solid var(--secondary); outline-offset: 2px; border-radius: 4px; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e63946;
            --primary-light: #ff6b6b;
            --primary-dark: #b71c1c;
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f4a261;
            --accent-light: #f9d5a0;
            --bg-body: #f8f9fa;
            --bg-white: #ffffff;
            --bg-dark: #0d1b2a;
            --bg-card: #ffffff;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-light: #6c757d;
            --text-white: #ffffff;
            --border-color: #e8e8ef;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.14);
            --shadow-hover: 0 12px 36px rgba(230, 57, 70, 0.18);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
            --nav-top-height: 44px;
        }

        /* ===== Reset ===== */
        *,
        *::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-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--header-height);
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-primary);
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 头部导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.04);
            height: var(--header-height);
            transition: var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.3px;
            white-space: nowrap;
        }
        .logo i {
            font-size: 26px;
            color: var(--primary);
        }
        .logo span {
            color: var(--secondary);
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-list a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
        }
        .nav-list a i {
            font-size: 14px;
            opacity: 0.7;
        }
        .nav-list a:hover {
            color: var(--primary);
            background: rgba(230, 57, 70, 0.06);
        }
        .nav-list a.active {
            color: var(--primary);
            background: rgba(230, 57, 70, 0.10);
            font-weight: 600;
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 28px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }
        .nav-cta {
            margin-left: 12px;
        }
        .nav-cta .btn {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            padding: 10px 24px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 4px 14px rgba(230, 57, 70, 0.30);
            transition: var(--transition);
        }
        .nav-cta .btn:hover {
            transform: translateY(-2px) scale(1.02);
            box-shadow: 0 8px 28px rgba(230, 57, 70, 0.40);
        }
        .nav-cta .btn i {
            font-size: 14px;
            opacity: 1;
        }

        /* 移动端菜单按钮 */
        .menu-toggle {
            display: none;
            font-size: 26px;
            color: var(--text-primary);
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            background: transparent;
            transition: var(--transition);
        }
        .menu-toggle:hover {
            background: rgba(0, 0, 0, 0.04);
        }

        /* ===== Hero / 横幅 ===== */
        .page-hero {
            position: relative;
            min-height: 340px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: linear-gradient(135deg, var(--secondary) 0%, #0d1b2a 100%);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: 80px 24px 60px;
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(13, 27, 42, 0.75) 0%, rgba(13, 27, 42, 0.50) 100%);
            z-index: 1;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .page-hero h1 {
            font-size: 44px;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.30);
        }
        .page-hero h1 i {
            color: var(--accent);
            margin-right: 12px;
        }
        .page-hero p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 680px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }
        .page-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            padding: 6px 20px;
            border-radius: 50px;
            color: #fff;
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 20px;
            border: 1px solid rgba(255, 255, 255, 0.20);
        }
        .page-hero .hero-badge i {
            color: var(--accent);
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 80px 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-title h2 {
            font-size: 34px;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-title h2 i {
            color: var(--primary);
            margin-right: 10px;
        }
        .section-title p {
            font-size: 17px;
            color: var(--text-light);
            max-width: 600px;
            margin: 0 auto;
        }
        .section-title .title-line {
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 4px;
            margin: 16px auto 0;
        }
        .section-subtitle {
            display: inline-block;
            background: rgba(230, 57, 70, 0.08);
            color: var(--primary);
            padding: 4px 18px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }
        .bg-white {
            background: var(--bg-white);
        }
        .bg-light {
            background: var(--bg-body);
        }
        .bg-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .bg-dark .section-title h2 {
            color: var(--text-white);
        }
        .bg-dark .section-title p {
            color: rgba(255, 255, 255, 0.70);
        }

        /* ===== 步骤流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 36px 28px 32px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .step-card .step-num {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-size: 20px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            box-shadow: 0 6px 20px rgba(230, 57, 70, 0.25);
        }
        .step-card .step-icon {
            font-size: 36px;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .step-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }
        .step-card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .step-card .step-arrow {
            position: absolute;
            top: 50%;
            right: -22px;
            transform: translateY(-50%);
            font-size: 28px;
            color: var(--accent);
            opacity: 0.6;
        }
        .steps-grid .step-card:last-child .step-arrow {
            display: none;
        }

        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .card-item:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-light);
        }
        .card-item .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            background: var(--secondary-light);
            transition: var(--transition);
        }
        .card-item:hover .card-img {
            transform: scale(1.03);
        }
        .card-item .card-body {
            padding: 24px 22px 26px;
        }
        .card-item .card-tag {
            display: inline-block;
            background: rgba(230, 57, 70, 0.08);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 2px 14px;
            border-radius: 50px;
            margin-bottom: 10px;
        }
        .card-item h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .card-item p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
        }
        .card-item .card-link {
            color: var(--primary);
            font-weight: 600;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .card-item .card-link i {
            font-size: 12px;
            transition: var(--transition);
        }
        .card-item .card-link:hover i {
            transform: translateX(4px);
        }

        /* ===== 技巧列表 ===== */
        .tips-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .tip-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            background: var(--bg-card);
            padding: 24px 26px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .tip-item:hover {
            border-color: var(--accent-light);
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .tip-item .tip-icon {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: rgba(230, 57, 70, 0.08);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            flex-shrink: 0;
        }
        .tip-item h4 {
            font-size: 17px;
            font-weight: 700;
            margin-bottom: 4px;
            color: var(--text-primary);
        }
        .tip-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 26px;
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            text-align: left;
            gap: 16px;
            transition: var(--transition);
        }
        .faq-question:hover {
            background: rgba(230, 57, 70, 0.03);
        }
        .faq-question i {
            color: var(--primary);
            font-size: 18px;
            transition: var(--transition);
        }
        .faq-question .faq-toggle {
            font-size: 14px;
            color: var(--text-light);
            transition: var(--transition);
        }
        .faq-item.active .faq-toggle {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 26px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.8;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 26px 22px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--secondary), #0d1b2a);
            padding: 72px 24px;
            text-align: center;
            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: 0.15;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 36px;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 14px;
        }
        .cta-section p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.80);
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            padding: 16px 44px;
            border-radius: var(--radius-sm);
            box-shadow: 0 8px 32px rgba(230, 57, 70, 0.40);
            transition: var(--transition);
            letter-spacing: 0.3px;
        }
        .cta-section .btn-cta:hover {
            transform: translateY(-4px) scale(1.03);
            box-shadow: 0 14px 44px rgba(230, 57, 70, 0.55);
        }
        .cta-section .btn-cta i {
            font-size: 18px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .logo {
            font-size: 22px;
            margin-bottom: 14px;
            color: #fff;
        }
        .footer-brand .logo i {
            color: var(--primary-light);
        }
        .footer-brand .logo span {
            color: var(--accent);
        }
        .footer-brand p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.8;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 32px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.65);
            font-size: 15px;
            padding: 6px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary-light);
            padding-left: 6px;
        }
        .footer-col a i {
            margin-right: 8px;
            width: 18px;
            text-align: center;
            color: var(--accent);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0 28px;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.50);
        }
        .footer-bottom-links {
            display: flex;
            gap: 20px;
        }
        .footer-bottom-links a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.50);
            transition: var(--transition);
        }
        .footer-bottom-links a:hover {
            color: var(--primary-light);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid .step-card .step-arrow {
                display: none;
            }
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }
            .page-hero h1 {
                font-size: 30px;
            }
            .page-hero p {
                font-size: 16px;
            }
            .section {
                padding: 56px 0;
            }
            .section-title h2 {
                font-size: 26px;
            }
            .nav-list {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                -webkit-backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 20px 24px 28px;
                gap: 8px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-lg);
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-list a {
                width: 100%;
                padding: 12px 18px;
                font-size: 16px;
            }
            .nav-list a.active::after {
                display: none;
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 8px;
                width: 100%;
            }
            .nav-cta .btn {
                width: 100%;
                justify-content: center;
                padding: 14px 24px;
            }
            .menu-toggle {
                display: block;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .card-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .tips-list {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .footer-bottom-links {
                justify-content: center;
                flex-wrap: wrap;
            }
        }

        @media (max-width: 520px) {
            .page-hero {
                min-height: 260px;
                padding: 60px 16px 40px;
            }
            .page-hero h1 {
                font-size: 24px;
            }
            .page-hero p {
                font-size: 15px;
            }
            .section-title h2 {
                font-size: 22px;
            }
            .step-card {
                padding: 28px 20px 24px;
            }
            .card-item .card-body {
                padding: 18px 16px 20px;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 15px;
            }
            .cta-section h2 {
                font-size: 26px;
            }
            .cta-section .btn-cta {
                padding: 14px 28px;
                font-size: 16px;
            }
            .logo {
                font-size: 18px;
            }
            .logo i {
                font-size: 20px;
            }
        }

        /* ===== 辅助工具 ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --color-primary: #1a365d;
            --color-primary-light: #2a4a7f;
            --color-primary-dark: #0f1f3a;
            --color-secondary: #d69e2e;
            --color-secondary-light: #ecc94b;
            --color-secondary-dark: #b7791f;
            --color-accent: #e53e3e;
            --color-bg: #f8f9fa;
            --color-bg-alt: #edf2f7;
            --color-bg-dark: #1a202c;
            --color-text: #1a202c;
            --color-text-light: #4a5568;
            --color-text-muted: #a0aec0;
            --color-border: #e2e8f0;
            --color-white: #ffffff;
            --color-success: #38a169;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 10px 40px rgba(0,0,0,0.10);
            --shadow-xl: 0 20px 60px rgba(0,0,0,0.14);
            --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-serif: 'Georgia', 'Noto Serif SC', serif;
            --transition: 0.25s ease;
            --max-width: 1200px;
            --header-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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background: var(--color-bg);
        }
        a { color: var(--color-primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--color-secondary); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--color-white);
            border-bottom: 1px solid var(--color-border);
            box-shadow: var(--shadow-sm);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            gap: 24px;
        }
        .site-logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--color-primary);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .site-logo i { color: var(--color-secondary); font-size: 1.5rem; }
        .site-logo span { color: var(--color-primary); }
        .site-logo .logo-highlight { color: var(--color-secondary); font-weight: 900; }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: nowrap;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        .nav-list::-webkit-scrollbar { display: none; }
        .nav-list a {
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            color: var(--color-text-light);
            font-weight: 500;
            font-size: 0.92rem;
            white-space: nowrap;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-list a i { font-size: 0.85rem; opacity: 0.7; }
        .nav-list a:hover { background: var(--color-bg-alt); color: var(--color-primary); }
        .nav-list a.active {
            background: var(--color-primary);
            color: var(--color-white);
            box-shadow: 0 2px 8px rgba(26,54,93,0.25);
        }
        .nav-list a.active i { opacity: 1; }
        .nav-cta {
            margin-left: 12px;
            flex-shrink: 0;
        }
        .nav-cta .btn {
            padding: 8px 20px;
            background: var(--color-secondary);
            color: var(--color-white);
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
            box-shadow: 0 2px 8px rgba(214,158,46,0.3);
            border: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .nav-cta .btn:hover {
            background: var(--color-secondary-dark);
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(214,158,46,0.4);
            color: var(--color-white);
        }

        /* Mobile toggle */
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--color-primary);
            cursor: pointer;
            padding: 4px;
            line-height: 1;
        }
        .nav-toggle:focus { outline: 2px solid var(--color-secondary); outline-offset: 2px; border-radius: 4px; }

        /* ===== Article Banner ===== */
        .article-banner {
            position: relative;
            background: var(--color-primary-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            padding: 80px 0 60px;
            color: var(--color-white);
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,31,58,0.88) 0%, rgba(26,54,93,0.72) 60%, rgba(0,0,0,0.4) 100%);
            z-index: 1;
        }
        .article-banner .container { position: relative; z-index: 2; }
        .article-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-breadcrumb a { color: rgba(255,255,255,0.8); }
        .article-breadcrumb a:hover { color: var(--color-secondary-light); }
        .article-breadcrumb .sep { opacity: 0.5; }
        .article-breadcrumb .current { color: var(--color-secondary-light); font-weight: 500; }

        .article-category-badge {
            display: inline-block;
            background: var(--color-secondary);
            color: var(--color-primary-dark);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.5px;
            text-transform: uppercase;
            margin-bottom: 16px;
        }
        .article-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.25;
            max-width: 900px;
            margin-bottom: 16px;
            text-shadow: 0 2px 12px rgba(0,0,0,0.3);
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: center;
            font-size: 0.92rem;
            color: rgba(255,255,255,0.75);
        }
        .article-meta i { margin-right: 6px; }
        .article-meta .meta-item { display: flex; align-items: center; }
        .article-desc {
            font-size: 1.1rem;
            line-height: 1.7;
            color: rgba(255,255,255,0.85);
            max-width: 800px;
            margin-top: 16px;
            border-left: 3px solid var(--color-secondary);
            padding-left: 20px;
        }

        /* ===== Article Content ===== */
        .article-section { padding: 60px 0; }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
        }
        .article-main {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            padding: 40px 44px;
            overflow: hidden;
        }
        .article-body {
            font-family: var(--font-serif);
            font-size: 1.1rem;
            line-height: 1.9;
            color: var(--color-text);
        }
        .article-body p { margin-bottom: 1.6em; }
        .article-body h2 {
            font-size: 1.6rem;
            font-weight: 700;
            margin: 2em 0 0.8em;
            color: var(--color-primary);
            border-bottom: 2px solid var(--color-border);
            padding-bottom: 10px;
            font-family: var(--font-sans);
        }
        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin: 1.6em 0 0.6em;
            color: var(--color-primary-light);
            font-family: var(--font-sans);
        }
        .article-body ul, .article-body ol {
            margin: 0 0 1.6em 1.6em;
        }
        .article-body ul { list-style: disc; }
        .article-body ol { list-style: decimal; }
        .article-body li { margin-bottom: 0.4em; }
        .article-body img {
            border-radius: var(--radius-md);
            margin: 2em auto;
            box-shadow: var(--shadow-md);
        }
        .article-body blockquote {
            border-left: 4px solid var(--color-secondary);
            background: var(--color-bg-alt);
            padding: 16px 24px;
            margin: 1.6em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--color-text-light);
        }
        .article-body a { color: var(--color-secondary-dark); text-decoration: underline; }
        .article-body a:hover { color: var(--color-primary); }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--color-border);
        }
        .article-tags .tag {
            padding: 4px 14px;
            background: var(--color-bg-alt);
            border-radius: 20px;
            font-size: 0.82rem;
            color: var(--color-text-light);
            font-weight: 500;
            transition: var(--transition);
        }
        .article-tags .tag:hover { background: var(--color-primary); color: var(--color-white); }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-card {
            background: var(--color-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 24px;
            border: 1px solid var(--color-border);
        }
        .sidebar-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--color-border);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i { color: var(--color-secondary); }
        .sidebar-list a {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 10px 0;
            border-bottom: 1px solid var(--color-border);
            transition: var(--transition);
        }
        .sidebar-list a:last-child { border-bottom: none; }
        .sidebar-list a:hover { padding-left: 6px; }
        .sidebar-list .thumb {
            width: 60px;
            height: 60px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--color-bg-alt);
        }
        .sidebar-list .info { flex: 1; min-width: 0; }
        .sidebar-list .info .title {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--color-text);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.4;
        }
        .sidebar-list .info .date {
            font-size: 0.75rem;
            color: var(--color-text-muted);
            margin-top: 4px;
        }

        .sidebar-cta {
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
            color: var(--color-white);
            padding: 28px 24px;
            border-radius: var(--radius-md);
            text-align: center;
        }
        .sidebar-cta h4 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
        .sidebar-cta p { font-size: 0.88rem; opacity: 0.85; margin-bottom: 16px; }
        .sidebar-cta .btn {
            background: var(--color-secondary);
            color: var(--color-primary-dark);
            padding: 10px 28px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            display: inline-block;
            transition: var(--transition);
        }
        .sidebar-cta .btn:hover { background: var(--color-secondary-light); transform: translateY(-2px); box-shadow: 0 4px 20px rgba(214,158,46,0.4); }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 20px;
            background: var(--color-white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
        }
        .not-found-box i { font-size: 4rem; color: var(--color-text-muted); margin-bottom: 20px; display: block; }
        .not-found-box h2 { font-size: 1.8rem; color: var(--color-text); margin-bottom: 12px; }
        .not-found-box p { color: var(--color-text-light); margin-bottom: 24px; font-size: 1.05rem; }
        .not-found-box .btn {
            padding: 12px 32px;
            background: var(--color-primary);
            color: var(--color-white);
            border-radius: var(--radius-sm);
            font-weight: 600;
            display: inline-block;
            transition: var(--transition);
        }
        .not-found-box .btn:hover { background: var(--color-primary-light); transform: translateY(-2px); box-shadow: var(--shadow-md); }

        /* ===== Related Section ===== */
        .related-section {
            background: var(--color-white);
            padding: 60px 0;
            border-top: 1px solid var(--color-border);
        }
        .related-section .section-title {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--color-primary);
            margin-bottom: 8px;
            text-align: center;
        }
        .related-section .section-sub {
            text-align: center;
            color: var(--color-text-light);
            margin-bottom: 32px;
            font-size: 1rem;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--color-bg);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border);
            transition: var(--transition);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: var(--color-bg-alt);
        }
        .related-card .card-body { padding: 18px 20px; }
        .related-card .card-cat {
            font-size: 0.75rem;
            color: var(--color-secondary);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .related-card .card-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--color-text);
            margin: 6px 0 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.4;
        }
        .related-card .card-title:hover { color: var(--color-primary); }
        .related-card .card-date {
            font-size: 0.8rem;
            color: var(--color-text-muted);
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
            padding: 60px 0;
            text-align: center;
            color: var(--color-white);
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 1.1rem;
            opacity: 0.85;
            max-width: 600px;
            margin: 0 auto 28px;
        }
        .cta-section .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 40px;
            background: var(--color-secondary);
            color: var(--color-primary-dark);
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 1.05rem;
            transition: var(--transition);
        }
        .cta-section .cta-btn:hover {
            background: var(--color-secondary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(214,158,46,0.35);
            color: var(--color-primary-dark);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-bg-dark);
            color: rgba(255,255,255,0.8);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .footer-brand .logo {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--color-white);
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
        }
        .footer-brand .logo i { color: var(--color-secondary); }
        .footer-brand .logo span { color: var(--color-white); }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; opacity: 0.7; max-width: 360px; }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--color-secondary-light); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.5);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom-links { display: flex; gap: 20px; }
        .footer-bottom-links a { color: rgba(255,255,255,0.5); font-size: 0.85rem; }
        .footer-bottom-links a:hover { color: var(--color-secondary-light); }

        /* ===== Back to Top ===== */
        .back-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--color-primary);
            color: var(--color-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: var(--shadow-md);
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .back-top.visible { opacity: 1; visibility: visible; }
        .back-top:hover { background: var(--color-primary-light); transform: translateY(-3px); box-shadow: var(--shadow-lg); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .article-banner h1 { font-size: 2.2rem; }
        }

        @media (max-width: 768px) {
            :root { --header-height: 64px; }
            .nav-list { display: none; }
            .nav-list.open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--color-white);
                border-bottom: 1px solid var(--color-border);
                box-shadow: var(--shadow-lg);
                padding: 12px 20px;
                gap: 4px;
                z-index: 999;
                overflow-y: auto;
                max-height: 60vh;
            }
            .nav-list.open a { width: 100%; padding: 10px 16px; }
            .nav-list.open .nav-cta { margin-left: 0; margin-top: 8px; width: 100%; }
            .nav-list.open .nav-cta .btn { width: 100%; justify-content: center; }
            .nav-toggle { display: block; }
            .article-banner { padding: 48px 0 36px; }
            .article-banner h1 { font-size: 1.6rem; }
            .article-meta { gap: 12px; font-size: 0.82rem; }
            .article-desc { font-size: 0.95rem; padding-left: 14px; }
            .article-main { padding: 24px 20px; }
            .article-body { font-size: 1rem; }
            .article-sidebar { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: 1fr; gap: 16px; }
            .related-card .card-img { height: 160px; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .footer-bottom-links { justify-content: center; }
            .cta-section h2 { font-size: 1.5rem; }
            .cta-section .cta-btn { width: 100%; justify-content: center; }
            .back-top { bottom: 20px; right: 20px; width: 42px; height: 42px; font-size: 1rem; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-banner h1 { font-size: 1.3rem; }
            .article-main { padding: 16px 14px; }
            .article-body { font-size: 0.95rem; }
            .article-body h2 { font-size: 1.3rem; }
            .article-body h3 { font-size: 1.1rem; }
            .site-logo { font-size: 1.1rem; }
            .site-logo i { font-size: 1.2rem; }
            .related-card .card-img { height: 140px; }
            .sidebar-cta { padding: 20px 16px; }
        }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-1 { margin-top: 8px; }
        .mt-2 { margin-top: 16px; }
        .mt-3 { margin-top: 24px; }
        .mb-2 { margin-bottom: 16px; }
        .mb-3 { margin-bottom: 24px; }
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }