/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #f7a600;
            --primary-dark: #d48f00;
            --primary-light: #ffc145;
            --secondary: #1a1a2e;
            --accent: #e74c3c;
            --bg-dark: #0d0d1a;
            --bg-card: #1a1a2e;
            --bg-card-hover: #232340;
            --bg-light: #f8f9fa;
            --text-light: #ffffff;
            --text-dark: #1a1a2e;
            --text-muted: #8e8e9a;
            --text-body: #c8c8d4;
            --border-color: #2a2a3e;
            --border-light: #3a3a4e;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.2);
            --shadow: 0 8px 32px rgba(0,0,0,0.3);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.4);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --max-width: 1200px;
            --header-h: 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(--text-body);
            background: var(--bg-dark);
            overflow-x: hidden;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-light); }
        a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 4px; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea, select { font-family: inherit; font-size: inherit; }
        button { cursor: pointer; border: none; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { color: var(--text-light); 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-title { text-align: center; margin-bottom: 48px; }
        .section-title h2 { display: inline-block; position: relative; }
        .section-title h2::after {
            content: ''; display: block; width: 60px; height: 4px;
            background: var(--primary); border-radius: 2px; margin: 12px auto 0;
        }
        .section-title p { color: var(--text-muted); max-width: 600px; margin: 12px auto 0; font-size: 1.1rem; }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            height: var(--header-h);
            background: rgba(13, 13, 26, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .site-header .container {
            display: flex; align-items: center; justify-content: space-between;
            height: 100%;
        }
        .site-logo {
            font-size: 1.4rem; font-weight: 800; color: var(--text-light);
            letter-spacing: -0.02em; display: flex; align-items: center; gap: 8px;
        }
        .site-logo i { color: var(--primary); font-size: 1.6rem; }
        .site-logo span { background: linear-gradient(135deg, var(--primary), var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .site-logo:hover { color: var(--text-light); }
        .nav-list { display: flex; align-items: center; gap: 32px; }
        .nav-list a {
            color: var(--text-muted); font-size: 0.95rem; font-weight: 500;
            position: relative; padding: 6px 0; letter-spacing: 0.01em;
        }
        .nav-list a::after {
            content: ''; position: absolute; bottom: -2px; left: 0; right: 0;
            height: 2px; background: var(--primary); border-radius: 1px;
            transform: scaleX(0); transition: var(--transition);
        }
        .nav-list a:hover { color: var(--text-light); }
        .nav-list a:hover::after { transform: scaleX(1); }
        .nav-list a.active { color: var(--text-light); }
        .nav-list a.active::after { transform: scaleX(1); }
        .nav-cta {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 8px 22px; border-radius: 50px; font-weight: 600; font-size: 0.9rem;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff !important; border: none; transition: var(--transition);
        }
        .nav-cta i { font-size: 0.85rem; }
        .nav-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(247, 166, 0, 0.35); color: #fff !important; }
        .nav-cta::after { display: none !important; }
        .nav-toggle { display: none; font-size: 1.5rem; color: var(--text-light); padding: 8px; }

        /* ===== Hero ===== */
        .hero {
            min-height: 100vh;
            display: flex; align-items: center;
            padding-top: var(--header-h);
            background: linear-gradient(135deg, #0d0d1a 0%, #1a1a2e 50%, #0d0d1a 100%);
            position: relative; overflow: hidden;
        }
        .hero::before {
            content: ''; position: absolute; top: -50%; right: -30%;
            width: 800px; height: 800px;
            background: radial-gradient(circle, rgba(247,166,0,0.08) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero::after {
            content: ''; position: absolute; bottom: -20%; left: -10%;
            width: 500px; height: 500px;
            background: radial-gradient(circle, rgba(231,76,60,0.05) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero .container { position: relative; z-index: 1; display: flex; align-items: center; gap: 60px; }
        .hero-content { flex: 1.1; }
        .hero-visual { flex: 0.9; text-align: center; }
        .hero-badge {
            display: inline-flex; align-items: center; gap: 6px;
            padding: 6px 16px; border-radius: 50px; font-size: 0.8rem; font-weight: 600;
            background: rgba(247,166,0,0.15); color: var(--primary); border: 1px solid rgba(247,166,0,0.25);
            margin-bottom: 20px; letter-spacing: 0.02em;
        }
        .hero-badge i { font-size: 0.7rem; }
        .hero h1 { font-size: 3.2rem; margin-bottom: 20px; }
        .hero h1 .highlight { background: linear-gradient(135deg, var(--primary), var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .hero p { font-size: 1.15rem; color: var(--text-muted); max-width: 540px; margin-bottom: 32px; line-height: 1.8; }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
        .btn-primary {
            display: inline-flex; align-items: center; gap: 10px;
            padding: 14px 32px; border-radius: 50px; font-weight: 700; font-size: 1rem;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff; border: none; transition: var(--transition);
        }
        .btn-primary i { font-size: 0.9rem; transition: var(--transition); }
        .btn-primary:hover { transform: translateY(-3px); box-shadow: 0 12px 32px rgba(247,166,0,0.35); color: #fff; }
        .btn-primary:hover i { transform: translateX(4px); }
        .btn-secondary {
            display: inline-flex; align-items: center; gap: 10px;
            padding: 14px 32px; border-radius: 50px; font-weight: 600; font-size: 1rem;
            background: transparent; color: var(--text-light); border: 1px solid var(--border-light);
            transition: var(--transition);
        }
        .btn-secondary:hover { background: rgba(255,255,255,0.05); border-color: var(--primary); color: var(--text-light); }
        .hero-stats { display: flex; gap: 40px; margin-top: 48px; padding-top: 32px; border-top: 1px solid var(--border-color); }
        .hero-stat h3 { font-size: 1.8rem; color: var(--primary); }
        .hero-stat p { font-size: 0.85rem; color: var(--text-muted); margin: 0; }
        .hero-visual-card {
            background: var(--bg-card); border-radius: var(--radius-lg);
            padding: 40px; border: 1px solid var(--border-color);
            box-shadow: var(--shadow-lg); position: relative;
        }
        .hero-visual-card .icon-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
        .hero-visual-card .icon-item {
            background: rgba(255,255,255,0.03); border-radius: var(--radius);
            padding: 20px 12px; text-align: center; border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .hero-visual-card .icon-item i { font-size: 1.8rem; color: var(--primary); margin-bottom: 8px; }
        .hero-visual-card .icon-item span { display: block; font-size: 0.8rem; color: var(--text-muted); }

        /* ===== Features ===== */
        .features { background: var(--bg-card); }
        .features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .feature-card {
            background: rgba(255,255,255,0.02); border-radius: var(--radius);
            padding: 36px 28px; border: 1px solid var(--border-color);
            transition: var(--transition); text-align: center;
        }
        .feature-card:hover { background: var(--bg-card-hover); border-color: var(--primary); transform: translateY(-4px); box-shadow: var(--shadow); }
        .feature-card .icon {
            width: 64px; height: 64px; border-radius: 16px;
            background: rgba(247,166,0,0.1); display: flex; align-items: center; justify-content: center;
            margin: 0 auto 20px; font-size: 1.6rem; color: var(--primary);
        }
        .feature-card h3 { margin-bottom: 12px; }
        .feature-card p { color: var(--text-muted); font-size: 0.95rem; margin: 0; }

        /* ===== Category Entry ===== */
        .category-entry { background: var(--bg-dark); }
        .category-entry .cat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
        .cat-card {
            display: flex; align-items: center; gap: 24px;
            background: var(--bg-card); border-radius: var(--radius);
            padding: 28px 32px; border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .cat-card:hover { border-color: var(--primary); transform: translateY(-3px); box-shadow: var(--shadow); }
        .cat-card .cat-icon {
            width: 56px; height: 56px; border-radius: 14px;
            background: rgba(247,166,0,0.1); display: flex; align-items: center; justify-content: center;
            font-size: 1.4rem; color: var(--primary); flex-shrink: 0;
        }
        .cat-card .cat-info h3 { font-size: 1.1rem; margin-bottom: 4px; }
        .cat-card .cat-info p { color: var(--text-muted); font-size: 0.9rem; margin: 0; }
        .cat-card .cat-arrow { margin-left: auto; color: var(--text-muted); font-size: 1.2rem; transition: var(--transition); }
        .cat-card:hover .cat-arrow { color: var(--primary); transform: translateX(4px); }

        /* ===== Latest Posts ===== */
        .latest-posts { background: var(--bg-card); }
        .posts-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .post-card {
            background: rgba(255,255,255,0.02); border-radius: var(--radius);
            border: 1px solid var(--border-color); overflow: hidden;
            transition: var(--transition); display: flex; flex-direction: column;
        }
        .post-card:hover { border-color: var(--primary); transform: translateY(-4px); box-shadow: var(--shadow); }
        .post-card .post-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
        .post-card .post-meta {
            display: flex; align-items: center; gap: 12px;
            font-size: 0.8rem; color: var(--text-muted); margin-bottom: 12px;
        }
        .post-card .post-meta .badge {
            padding: 2px 12px; border-radius: 50px; font-size: 0.7rem; font-weight: 600;
            background: rgba(247,166,0,0.15); color: var(--primary);
        }
        .post-card h3 { font-size: 1.1rem; margin-bottom: 8px; flex: 1; }
        .post-card h3 a { color: var(--text-light); }
        .post-card h3 a:hover { color: var(--primary); }
        .post-card .post-excerpt { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 16px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .post-card .post-link { color: var(--primary); font-size: 0.9rem; font-weight: 600; display: inline-flex; align-items: center; gap: 6px; }
        .post-card .post-link i { font-size: 0.75rem; transition: var(--transition); }
        .post-card:hover .post-link i { transform: translateX(4px); }
        .empty-posts { grid-column: 1 / -1; text-align: center; padding: 48px 24px; color: var(--text-muted); font-size: 1.1rem; background: rgba(255,255,255,0.02); border-radius: var(--radius); border: 1px dashed var(--border-color); }

        /* ===== Process / Flow ===== */
        .process { background: var(--bg-dark); }
        .process-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
        .process-steps::before {
            content: ''; position: absolute; top: 48px; left: 10%; right: 10%;
            height: 2px; background: linear-gradient(90deg, var(--primary), var(--border-color), var(--primary));
            opacity: 0.3;
        }
        .step-card { text-align: center; position: relative; }
        .step-card .step-num {
            width: 48px; height: 48px; border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff; font-weight: 800; font-size: 1.2rem;
            display: flex; align-items: center; justify-content: center;
            margin: 0 auto 20px; position: relative; z-index: 1;
            box-shadow: 0 0 0 4px rgba(247,166,0,0.15);
        }
        .step-card h4 { margin-bottom: 8px; }
        .step-card p { color: var(--text-muted); font-size: 0.9rem; margin: 0; }

        /* ===== Stats ===== */
        .stats-bar { background: var(--bg-card); border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color); }
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; padding: 48px 0; text-align: center; }
        .stat-item h3 { font-size: 2.4rem; color: var(--primary); margin-bottom: 4px; }
        .stat-item p { color: var(--text-muted); font-size: 0.9rem; margin: 0; }
        .stat-item .stat-icon { font-size: 1.4rem; color: var(--text-muted); margin-bottom: 12px; opacity: 0.5; }

        /* ===== FAQ ===== */
        .faq { background: var(--bg-dark); }
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--bg-card); border-radius: var(--radius);
            border: 1px solid var(--border-color); overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--border-light); }
        .faq-question {
            display: flex; align-items: center; justify-content: space-between;
            padding: 20px 24px; cursor: pointer; font-weight: 600; color: var(--text-light);
            font-size: 1rem; transition: var(--transition); gap: 16px;
        }
        .faq-question i { color: var(--primary); 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 0.4s ease, padding 0.4s ease;
            padding: 0 24px; color: var(--text-muted); font-size: 0.95rem; line-height: 1.8;
        }
        .faq-answer.open { max-height: 300px; padding: 0 24px 20px; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #1a1a2e 0%, #0d0d1a 100%);
            border-top: 1px solid var(--border-color); border-bottom: 1px solid var(--border-color);
            text-align: center; padding: 80px 0;
        }
        .cta-section h2 { font-size: 2.4rem; margin-bottom: 16px; }
        .cta-section p { color: var(--text-muted); max-width: 560px; margin: 0 auto 32px; font-size: 1.1rem; }
        .cta-section .btn-primary { font-size: 1.05rem; padding: 16px 40px; }

        /* ===== Footer ===== */
        .site-footer {
            background: #08081a; border-top: 1px solid var(--border-color);
            padding: 48px 0 24px;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 32px; }
        .footer-brand .site-logo { margin-bottom: 12px; }
        .footer-brand p { color: var(--text-muted); font-size: 0.9rem; max-width: 360px; }
        .footer-col h4 { font-size: 0.95rem; margin-bottom: 16px; color: var(--text-light); }
        .footer-col a { display: block; color: var(--text-muted); font-size: 0.9rem; padding: 4px 0; }
        .footer-col a:hover { color: var(--primary); }
        .footer-bottom {
            border-top: 1px solid var(--border-color); padding-top: 20px;
            display: flex; align-items: center; justify-content: space-between;
            font-size: 0.85rem; color: var(--text-muted);
        }
        .footer-bottom a { color: var(--text-muted); }
        .footer-bottom a:hover { color: var(--primary); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            h1 { font-size: 2.4rem; }
            h2 { font-size: 1.8rem; }
            .hero h1 { font-size: 2.6rem; }
            .hero .container { gap: 40px; }
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .posts-grid { grid-template-columns: repeat(2, 1fr); }
            .process-steps { grid-template-columns: repeat(2, 1fr); }
            .process-steps::before { display: none; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            :root { --header-h: 64px; }
            .section-pad { padding: 56px 0; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.5rem; }
            .hero { min-height: auto; padding: 100px 0 60px; }
            .hero .container { flex-direction: column; text-align: center; }
            .hero h1 { font-size: 2rem; }
            .hero p { margin-left: auto; margin-right: auto; }
            .hero-actions { justify-content: center; }
            .hero-stats { justify-content: center; }
            .hero-visual-card { padding: 24px; }
            .hero-visual-card .icon-grid { grid-template-columns: repeat(3, 1fr); gap: 12px; }
            .hero-visual-card .icon-item { padding: 12px 8px; }
            .nav-list { display: none; }
            .nav-toggle { display: block; }
            .nav-list.mobile-open {
                display: flex; flex-direction: column; gap: 0;
                position: absolute; top: var(--header-h); left: 0; right: 0;
                background: rgba(13,13,26,0.98); border-bottom: 1px solid var(--border-color);
                padding: 16px 24px; align-items: stretch;
            }
            .nav-list.mobile-open a { padding: 12px 0; border-bottom: 1px solid var(--border-color); }
            .nav-list.mobile-open a:last-child { border-bottom: none; }
            .nav-list.mobile-open .nav-cta { margin-top: 8px; justify-content: center; }
            .features-grid { grid-template-columns: 1fr; }
            .category-entry .cat-grid { grid-template-columns: 1fr; }
            .posts-grid { grid-template-columns: 1fr; }
            .process-steps { grid-template-columns: 1fr; gap: 32px; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
            .cta-section h2 { font-size: 1.8rem; }
            .hero-stats { gap: 24px; }
            .hero-stat h3 { font-size: 1.4rem; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero h1 { font-size: 1.6rem; }
            .hero-actions { flex-direction: column; align-items: center; }
            .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
            .hero-stats { flex-wrap: wrap; gap: 16px; }
            .stats-grid { grid-template-columns: 1fr 1fr; }
            .faq-question { font-size: 0.9rem; padding: 16px 18px; }
            .faq-answer { font-size: 0.9rem; }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #d32f2f;
            --primary-dark: #b71c1c;
            --primary-light: #ffebee;
            --accent: #ff6f00;
            --accent-light: #fff3e0;
            --bg-body: #f7f5f2;
            --bg-card: #ffffff;
            --bg-dark: #1a1a2e;
            --bg-dark-alt: #16213e;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-light: #8a8aaa;
            --text-white: #ffffff;
            --border-color: #e8e4e0;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.10);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.12);
            --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
            --font-body: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font-body);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        a:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 2px; }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
        h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
        h2 { font-size: clamp(1.4rem, 2.8vw, 2.0rem); }
        h3 { font-size: clamp(1.1rem, 1.8vw, 1.4rem); }
        p { margin-bottom: 1rem; }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

        /* ===== 导航 ===== */
        .site-header {
            background: var(--bg-dark);
            border-bottom: 3px solid var(--primary);
            padding: 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 20px rgba(0,0,0,0.25);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: 0.5px;
        }
        .site-logo i { color: var(--primary); font-size: 1.4rem; }
        .site-logo span { background: linear-gradient(135deg, #fff, #f0e6e6); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .site-logo:hover { opacity: 0.9; color: var(--text-white); }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 0;
        }
        .nav-list li a {
            display: block;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            color: rgba(255,255,255,0.80);
            font-weight: 500;
            font-size: 0.92rem;
            transition: var(--transition);
            position: relative;
        }
        .nav-list li a:hover { background: rgba(211,47,47,0.18); color: #fff; }
        .nav-list li a.active { background: var(--primary); color: #fff; box-shadow: 0 4px 14px rgba(211,47,47,0.35); }
        .nav-list li a.nav-cta {
            background: var(--accent);
            color: #fff;
            padding: 8px 22px;
            border-radius: 50px;
            font-weight: 700;
            box-shadow: 0 4px 14px rgba(255,111,0,0.30);
            margin-left: 10px;
        }
        .nav-list li a.nav-cta i { margin-right: 6px; font-size: 0.8rem; }
        .nav-list li a.nav-cta:hover { background: #e65100; transform: translateY(-1px); box-shadow: 0 6px 20px rgba(255,111,0,0.40); }
        .nav-toggle { display: none; background: none; border: none; color: #fff; font-size: 1.6rem; cursor: pointer; padding: 4px 8px; border-radius: var(--radius-sm); transition: var(--transition); }
        .nav-toggle:hover { background: rgba(255,255,255,0.08); }

        /* ===== 文章页 Hero ===== */
        .article-hero {
            background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-dark-alt) 100%);
            padding: 60px 0 50px;
            border-bottom: 3px solid var(--primary);
            position: relative;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent), var(--primary));
            background-size: 200% 100%;
            animation: shimmer 3s infinite linear;
        }
        @keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }
        .article-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-light);
            font-size: 0.85rem;
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .article-hero .breadcrumb a { color: rgba(255,255,255,0.6); }
        .article-hero .breadcrumb a:hover { color: var(--primary); }
        .article-hero .breadcrumb span { color: rgba(255,255,255,0.35); }
        .article-hero .breadcrumb .current { color: #fff; font-weight: 500; }
        .article-hero h1 {
            color: var(--text-white);
            font-size: clamp(1.6rem, 3.5vw, 2.6rem);
            line-height: 1.25;
            max-width: 900px;
            margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.30);
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            color: rgba(255,255,255,0.65);
            font-size: 0.9rem;
        }
        .article-meta .category-tag {
            background: var(--primary);
            color: #fff;
            padding: 2px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .article-meta i { margin-right: 4px; }

        /* ===== 文章主体 ===== */
        .article-main { padding: 50px 0 60px; }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 50px;
        }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 40px 42px;
            border: 1px solid var(--border-color);
        }
        .article-body .featured-image {
            width: 100%;
            border-radius: var(--radius-md);
            margin-bottom: 30px;
            max-height: 460px;
            object-fit: cover;
            box-shadow: var(--shadow-sm);
        }
        .article-body .content-body {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-primary);
        }
        .article-body .content-body p { margin-bottom: 1.2rem; }
        .article-body .content-body h2, 
        .article-body .content-body h3 { margin-top: 1.8rem; margin-bottom: 0.8rem; }
        .article-body .content-body ul, 
        .article-body .content-body ol { margin-bottom: 1.2rem; padding-left: 1.8rem; list-style: disc; }
        .article-body .content-body li { margin-bottom: 0.4rem; }
        .article-body .content-body a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
        .article-body .content-body blockquote {
            border-left: 4px solid var(--primary);
            padding: 16px 20px;
            margin: 1.5rem 0;
            background: var(--primary-light);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
        }
        .article-body .content-body img { border-radius: var(--radius-md); margin: 1.5rem 0; box-shadow: var(--shadow-sm); }
        .article-body .content-body pre {
            background: var(--bg-dark);
            color: #f0e6e6;
            padding: 20px 24px;
            border-radius: var(--radius-md);
            overflow-x: auto;
            font-size: 0.9rem;
            margin: 1.5rem 0;
        }

        .article-not-found {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 60px 40px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .article-not-found i { font-size: 3.6rem; color: var(--text-light); margin-bottom: 20px; display: block; }
        .article-not-found h2 { color: var(--text-primary); margin-bottom: 12px; }
        .article-not-found p { color: var(--text-secondary); margin-bottom: 24px; }
        .article-not-found .btn-back { display: inline-block; }

        /* ===== 侧边栏 ===== */
        .article-sidebar .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            padding: 28px 24px;
            margin-bottom: 24px;
        }
        .article-sidebar .sidebar-card h3 {
            font-size: 1.1rem;
            margin-bottom: 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .article-sidebar .sidebar-card h3 i { color: var(--primary); }
        .sidebar-related a {
            display: flex;
            gap: 14px;
            padding: 12px 0;
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .sidebar-related a:last-child { border-bottom: none; }
        .sidebar-related a:hover { padding-left: 6px; }
        .sidebar-related .related-img {
            width: 70px;
            height: 54px;
            border-radius: var(--radius-sm);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--border-color);
        }
        .sidebar-related .related-info { flex: 1; }
        .sidebar-related .related-info h4 { font-size: 0.9rem; font-weight: 600; margin-bottom: 2px; color: var(--text-primary); }
        .sidebar-related .related-info span { font-size: 0.78rem; color: var(--text-light); }
        .sidebar-tags { display: flex; flex-wrap: wrap; gap: 8px; }
        .sidebar-tags a {
            background: var(--primary-light);
            color: var(--primary-dark);
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
            transition: var(--transition);
        }
        .sidebar-tags a:hover { background: var(--primary); color: #fff; }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            text-align: center;
            padding: 32px 24px;
        }
        .sidebar-cta h3 { color: #fff; border-bottom-color: rgba(255,255,255,0.2); }
        .sidebar-cta p { color: rgba(255,255,255,0.85); font-size: 0.9rem; margin-bottom: 18px; }
        .sidebar-cta .btn-cta {
            background: var(--accent);
            color: #fff;
            padding: 10px 30px;
            border-radius: 50px;
            font-weight: 700;
            display: inline-block;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(0,0,0,0.20);
        }
        .sidebar-cta .btn-cta:hover { background: #e65100; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.30); }

        /* ===== 通用按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 14px rgba(211,47,47,0.25); }
        .btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(211,47,47,0.35); }
        .btn-outline { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
        .btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }

        /* ===== 相关文章板块 ===== */
        .related-section {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            padding: 40px 42px;
            margin-top: 40px;
        }
        .related-section h2 {
            font-size: 1.4rem;
            margin-bottom: 24px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .related-section h2 i { color: var(--primary); }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 20px;
        }
        .related-card {
            background: var(--bg-body);
            border-radius: var(--radius-sm);
            padding: 18px 20px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .related-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
        .related-card h4 { font-size: 0.95rem; margin-bottom: 6px; }
        .related-card h4 a { color: var(--text-primary); }
        .related-card h4 a:hover { color: var(--primary); }
        .related-card span { font-size: 0.78rem; color: var(--text-light); }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.75);
            padding: 50px 0 0;
            border-top: 3px solid var(--primary);
            margin-top: 60px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 30px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .site-logo { margin-bottom: 14px; font-size: 1.2rem; }
        .footer-brand p { font-size: 0.88rem; color: rgba(255,255,255,0.55); max-width: 400px; line-height: 1.7; }
        .footer-col h4 { color: #fff; font-size: 1rem; margin-bottom: 16px; letter-spacing: 0.5px; }
        .footer-col a { display: block; color: rgba(255,255,255,0.55); font-size: 0.88rem; padding: 4px 0; transition: var(--transition); }
        .footer-col a:hover { color: var(--primary); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.40);
            flex-wrap: wrap;
            gap: 10px;
        }
        .footer-bottom a { color: rgba(255,255,255,0.55); }
        .footer-bottom a:hover { color: var(--primary); }

        /* ===== 响应式 ===== */
        @media screen and (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-sidebar { order: -1; }
            .article-sidebar .sidebar-card { margin-bottom: 16px; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
        }
        @media screen and (max-width: 768px) {
            .nav-list { display: none; }
            .nav-toggle { display: block; }
            .nav-list.open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: var(--bg-dark);
                padding: 16px 20px 24px;
                border-bottom: 3px solid var(--primary);
                box-shadow: var(--shadow-lg);
                gap: 4px;
                z-index: 999;
            }
            .nav-list.open li a { padding: 12px 18px; font-size: 1rem; }
            .nav-list.open li a.nav-cta { margin-left: 0; margin-top: 6px; text-align: center; }
            .article-hero { padding: 40px 0 36px; }
            .article-body { padding: 24px 18px; }
            .related-section { padding: 24px 18px; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media screen and (max-width: 520px) {
            .article-hero h1 { font-size: 1.4rem; }
            .article-meta { gap: 10px; font-size: 0.8rem; }
            .article-body { padding: 16px 12px; }
            .site-header .container { height: 58px; }
            .site-logo { font-size: 1rem; gap: 6px; }
            .site-logo i { font-size: 1.1rem; }
        }

        /* ===== 辅助 ===== */
        .text-center { text-align: center; }
        .mt-2 { margin-top: 20px; }
        .mb-2 { margin-bottom: 20px; }
        .gap-1 { gap: 10px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e82c2c;
            --primary-dark: #b71c1c;
            --primary-light: #ff6b4a;
            --secondary: #1a1a2e;
            --secondary-light: #2d2d44;
            --accent: #ffd700;
            --accent-dark: #e6c200;
            --bg-dark: #0d0d1a;
            --bg-card: #14142a;
            --bg-section: #0f0f24;
            --bg-light: #f5f5fa;
            --text-white: #ffffff;
            --text-light: #e0e0f0;
            --text-muted: #9a9abf;
            --text-dark: #1a1a2e;
            --border-color: #2a2a4a;
            --border-light: #3a3a5a;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 30px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.5);
            --shadow-hover: 0 16px 48px rgba(232, 44, 44, 0.25);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --spacer: 80px;
            --spacer-mobile: 48px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-dark);
            color: var(--text-light);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary);
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 4px;
        }

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

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

        ::selection {
            background: var(--primary);
            color: #fff;
        }

        /* ===== Container ===== */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        @media screen and (max-width: 768px) {
            .container {
                padding: 0 18px;
            }
        }

        /* ===== 导航 Header (与首页共享视觉) ===== */
        .site-header {
            background: rgba(13, 13, 26, 0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 0 0;
            height: 70px;
            display: flex;
            align-items: center;
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            width: 100%;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: 0.5px;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .site-logo i {
            color: var(--primary);
            font-size: 1.6rem;
            filter: drop-shadow(0 0 8px rgba(232, 44, 44, 0.4));
        }
        .site-logo span {
            background: linear-gradient(135deg, #fff 60%, var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .site-logo:hover {
            opacity: 0.9;
            transform: scale(1.02);
        }

        .site-header nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-list {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-list li {
            margin: 0;
            padding: 0;
        }

        .nav-list a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-muted);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-list a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 60%;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-list a:hover {
            color: var(--text-white);
            background: rgba(232, 44, 44, 0.1);
        }
        .nav-list a:hover::after {
            transform: translateX(-50%) scaleX(1);
        }
        .nav-list a.active {
            color: var(--text-white);
            background: rgba(232, 44, 44, 0.15);
        }
        .nav-list a.active::after {
            transform: translateX(-50%) scaleX(1);
        }

        .nav-list a.nav-cta {
            background: var(--primary);
            color: #fff;
            padding: 8px 24px;
            border-radius: var(--radius-lg);
            font-weight: 700;
            box-shadow: 0 4px 16px rgba(232, 44, 44, 0.35);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        .nav-list a.nav-cta::after {
            display: none;
        }
        .nav-list a.nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(232, 44, 44, 0.5);
        }
        .nav-list a.nav-cta i {
            font-size: 0.85rem;
            transition: var(--transition);
        }
        .nav-list a.nav-cta:hover i {
            transform: translateX(4px);
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: 2px solid var(--border-color);
            color: var(--text-white);
            font-size: 1.6rem;
            padding: 6px 14px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: var(--transition);
            line-height: 1;
        }
        .nav-toggle:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        @media screen and (max-width: 820px) {
            .nav-list {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background: rgba(13, 13, 26, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 18px 20px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8);
                gap: 4px;
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list a {
                width: 100%;
                justify-content: center;
                padding: 14px 20px;
                font-size: 1.05rem;
            }
            .nav-list a::after {
                display: none;
            }
            .nav-list a.active {
                background: rgba(232, 44, 44, 0.2);
                border-radius: var(--radius-sm);
            }
            .nav-list a.nav-cta {
                margin-top: 8px;
                width: 100%;
                text-align: center;
                justify-content: center;
            }
            .nav-toggle {
                display: block;
            }
        }

        /* ===== 页脚 (与首页共享) ===== */
        .site-footer {
            background: var(--secondary);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 20px;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 40px;
        }

        .footer-brand .site-logo {
            margin-bottom: 16px;
            display: inline-flex;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.95rem;
            max-width: 400px;
            line-height: 1.8;
        }

        .footer-col h4 {
            color: var(--text-white);
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 36px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }
        .footer-col a {
            display: block;
            color: var(--text-muted);
            font-size: 0.95rem;
            padding: 6px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary-light);
            padding-left: 6px;
        }

        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-light);
            font-weight: 600;
        }
        .footer-bottom a:hover {
            color: var(--primary-light);
        }

        @media screen and (max-width: 820px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 全局板块通用 ===== */
        .section {
            padding: var(--spacer) 0;
        }
        .section-dark {
            background: var(--bg-section);
        }
        .section-card {
            background: var(--bg-card);
        }

        .section-title {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 12px;
            letter-spacing: -0.5px;
            line-height: 1.3;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 700px;
            margin-bottom: 40px;
            line-height: 1.8;
        }
        .section-title .highlight {
            background: linear-gradient(135deg, var(--primary-light), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .text-center {
            text-align: center;
        }
        .text-center .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

        @media screen and (max-width: 768px) {
            .section {
                padding: var(--spacer-mobile) 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .section-subtitle {
                font-size: 1rem;
                margin-bottom: 28px;
            }
        }

        /* ===== 按钮系统 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            border-radius: var(--radius-lg);
            font-weight: 700;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            line-height: 1.4;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 20px rgba(232, 44, 44, 0.35);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-3px);
            box-shadow: 0 10px 36px rgba(232, 44, 44, 0.5);
            color: #fff;
        }
        .btn-secondary {
            background: transparent;
            color: var(--text-white);
            border: 2px solid var(--border-light);
        }
        .btn-secondary:hover {
            border-color: var(--primary);
            background: rgba(232, 44, 44, 0.08);
            transform: translateY(-3px);
            color: var(--text-white);
        }
        .btn-accent {
            background: var(--accent);
            color: var(--text-dark);
            box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
        }
        .btn-accent:hover {
            background: var(--accent-dark);
            transform: translateY(-3px);
            box-shadow: 0 10px 36px rgba(255, 215, 0, 0.4);
            color: var(--text-dark);
        }
        .btn-sm {
            padding: 10px 22px;
            font-size: 0.9rem;
        }
        .btn-lg {
            padding: 18px 44px;
            font-size: 1.1rem;
        }
        .btn i {
            font-size: 0.9em;
            transition: var(--transition);
        }
        .btn:hover i {
            transform: translateX(4px);
        }
        .btn:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 4px;
        }

        /* ===== 卡片系统 ===== */
        .card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: var(--transition);
            box-shadow: var(--shadow-card);
        }
        .card:hover {
            border-color: var(--primary);
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .card .card-icon {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 16px;
            display: inline-block;
            filter: drop-shadow(0 0 12px rgba(232, 44, 44, 0.3));
        }
        .card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 10px;
        }
        .card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 0;
        }
        .card .card-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            background: rgba(232, 44, 44, 0.15);
            color: var(--primary-light);
            border: 1px solid rgba(232, 44, 44, 0.2);
            margin-bottom: 12px;
        }

        /* ===== 徽章 ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(232, 44, 44, 0.12);
            color: var(--primary-light);
            border: 1px solid rgba(232, 44, 44, 0.2);
        }
        .badge i {
            font-size: 0.75rem;
        }
        .badge-accent {
            background: rgba(255, 215, 0, 0.12);
            color: var(--accent);
            border-color: rgba(255, 215, 0, 0.2);
        }

        /* ===== 网格 ===== */
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }
        .grid-3 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 28px;
        }
        .grid-4 {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr 1fr;
            gap: 24px;
        }

        @media screen and (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media screen and (max-width: 768px) {
            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        /* ===== 步骤 / 时间线 ===== */
        .step-list {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr 1fr;
            gap: 24px;
            counter-reset: step-counter;
        }
        .step-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px 24px 24px;
            position: relative;
            transition: var(--transition);
            counter-increment: step-counter;
        }
        .step-item:hover {
            border-color: var(--primary);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .step-item::before {
            content: counter(step-counter);
            position: absolute;
            top: 16px;
            right: 20px;
            font-size: 2.8rem;
            font-weight: 900;
            color: rgba(232, 44, 44, 0.15);
            line-height: 1;
            font-family: var(--font-sans);
        }
        .step-item .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 800;
            font-size: 1.2rem;
            margin-bottom: 16px;
            box-shadow: 0 4px 16px rgba(232, 44, 44, 0.3);
        }
        .step-item h4 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 0;
        }

        @media screen and (max-width: 1024px) {
            .step-list {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media screen and (max-width: 768px) {
            .step-list {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .step-item {
                padding: 24px 18px 20px;
            }
        }

        /* ===== 图文区块 ===== */
        .split-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .split-block .visual {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 32px;
            min-height: 280px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-card);
            position: relative;
            overflow: hidden;
        }
        .split-block .visual::after {
            content: '';
            position: absolute;
            top: -50%;
            right: -50%;
            width: 100%;
            height: 100%;
            background: radial-gradient(circle, rgba(232, 44, 44, 0.08), transparent 70%);
            pointer-events: none;
        }
        .split-block .visual i {
            font-size: 5rem;
            color: var(--primary);
            opacity: 0.6;
            filter: drop-shadow(0 0 30px rgba(232, 44, 44, 0.2));
        }
        .split-block .visual .badge-group {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
        }
        .split-block .content h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
            line-height: 1.3;
        }
        .split-block .content p {
            color: var(--text-muted);
            font-size: 1.05rem;
            line-height: 1.8;
            margin-bottom: 16px;
        }
        .split-block .content .feature-list {
            list-style: none;
            padding: 0;
            margin: 20px 0;
        }
        .split-block .content .feature-list li {
            padding: 8px 0;
            display: flex;
            align-items: flex-start;
            gap: 12px;
            color: var(--text-light);
            font-size: 1rem;
        }
        .split-block .content .feature-list li i {
            color: var(--primary);
            font-size: 1.1rem;
            margin-top: 3px;
            flex-shrink: 0;
        }

        @media screen and (max-width: 820px) {
            .split-block {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .split-block .content h2 {
                font-size: 1.6rem;
            }
            .split-block .visual {
                min-height: 200px;
                padding: 24px;
                order: -1;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 0;
            transition: var(--transition);
            overflow: hidden;
        }
        .faq-item:hover {
            border-color: var(--border-light);
        }
        .faq-question {
            padding: 20px 28px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-white);
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            gap: 16px;
            transition: var(--transition);
            font-family: var(--font-sans);
        }
        .faq-question:hover {
            background: rgba(232, 44, 44, 0.04);
        }
        .faq-question i {
            color: var(--primary);
            font-size: 1.2rem;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 28px 20px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.8;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .faq-item .faq-question .badge {
            font-size: 0.7rem;
            padding: 2px 10px;
            margin-left: 8px;
        }

        @media screen and (max-width: 768px) {
            .faq-question {
                padding: 16px 18px;
                font-size: 0.98rem;
            }
            .faq-answer {
                padding: 0 18px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-box {
            background: linear-gradient(135deg, var(--primary-dark), var(--secondary-light));
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            padding: 56px 48px;
            text-align: center;
            box-shadow: var(--shadow-card);
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at 30% 40%, rgba(232, 44, 44, 0.08), transparent 60%);
            pointer-events: none;
        }
        .cta-box h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 12px;
            position: relative;
        }
        .cta-box p {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto 32px;
            position: relative;
        }
        .cta-box .btn-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            position: relative;
        }

        @media screen and (max-width: 768px) {
            .cta-box {
                padding: 36px 24px;
            }
            .cta-box h2 {
                font-size: 1.6rem;
            }
            .cta-box p {
                font-size: 1rem;
            }
        }

        /* ===== 分隔线 ===== */
        .divider {
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 0 auto 20px;
        }
        .divider-left {
            margin: 0 0 20px;
        }

        /* ===== 统计数字 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px 16px;
            transition: var(--transition);
        }
        .stat-item:hover {
            border-color: var(--primary);
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .stat-item .stat-number {
            font-size: 2.8rem;
            font-weight: 900;
            color: var(--text-white);
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .stat-item .stat-number .highlight {
            color: var(--primary);
        }
        .stat-item .stat-label {
            font-size: 0.95rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        @media screen and (max-width: 820px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-item .stat-number {
                font-size: 2.2rem;
            }
        }
        @media screen and (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 标签/关键词列表 ===== */
        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .tag-list li a {
            display: inline-block;
            padding: 8px 20px;
            border-radius: 20px;
            font-size: 0.88rem;
            font-weight: 500;
            background: rgba(232, 44, 44, 0.08);
            color: var(--text-muted);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .tag-list li a:hover {
            background: rgba(232, 44, 44, 0.18);
            color: var(--text-white);
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        /* ===== 搜索框 ===== */
        .search-box {
            display: flex;
            max-width: 520px;
            margin: 0 auto;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            background: var(--bg-card);
            transition: var(--transition);
        }
        .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(232, 44, 44, 0.15);
        }
        .search-box input {
            flex: 1;
            padding: 16px 20px;
            background: transparent;
            border: none;
            color: var(--text-white);
            font-size: 1rem;
            outline: none;
            min-width: 0;
        }
        .search-box input::placeholder {
            color: var(--text-muted);
        }
        .search-box button {
            padding: 16px 24px;
            background: var(--primary);
            color: #fff;
            border: none;
            font-size: 1.1rem;
            cursor: pointer;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .search-box button:hover {
            background: var(--primary-dark);
        }

        /* ===== Hero 内页 ===== */
        .page-hero {
            padding: 80px 0 60px;
            background: var(--bg-section);
            border-bottom: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 50%;
            height: 120%;
            background: radial-gradient(circle, rgba(232, 44, 44, 0.06), transparent 70%);
            pointer-events: none;
        }
        .page-hero .container {
            position: relative;
        }
        .page-hero h1 {
            font-size: 2.8rem;
            font-weight: 900;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
            line-height: 1.2;
        }
        .page-hero p {
            font-size: 1.15rem;
            color: var(--text-muted);
            max-width: 680px;
            line-height: 1.8;
            margin-bottom: 24px;
        }
        .page-hero .breadcrumb {
            display: flex;
            gap: 10px;
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }
        .page-hero .breadcrumb a {
            color: var(--text-muted);
        }
        .page-hero .breadcrumb a:hover {
            color: var(--primary-light);
        }
        .page-hero .breadcrumb span {
            color: var(--text-light);
        }

        @media screen and (max-width: 768px) {
            .page-hero {
                padding: 48px 0 36px;
            }
            .page-hero h1 {
                font-size: 2rem;
            }
            .page-hero p {
                font-size: 1rem;
            }
        }

        /* ===== Foundation 覆盖 ===== */
        .grid-container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }
        @media screen and (max-width: 768px) {
            .grid-container {
                padding-left: 18px;
                padding-right: 18px;
            }
        }

        /* ===== 额外响应式 ===== */
        @media screen and (max-width: 520px) {
            .page-hero h1 {
                font-size: 1.6rem;
            }
            .btn-lg {
                padding: 14px 28px;
                font-size: 1rem;
            }
            .section-title {
                font-size: 1.5rem;
            }
        }

        /* ===== 滚动动画辅助 ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }