/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #0b0f1a;
            --color-secondary: #131b2e;
            --color-accent: #f5b80d;
            --color-accent-hover: #e0a800;
            --color-bg: #0b0f1a;
            --color-surface: #131b2e;
            --color-surface-hover: #1a2340;
            --color-border: #1e2a45;
            --color-text: #f0f4f8;
            --color-text-secondary: #8a94a6;
            --color-text-muted: #5a6478;
            --color-glow: rgba(245, 184, 13, 0.15);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.4);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.6);
            --shadow-glow: 0 0 30px rgba(245,184,13,0.08);
            --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== Reset / Base ===== */
        *, *::before, *::after { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.6;
            background-color: var(--color-bg);
            color: var(--color-text);
            -webkit-font-smoothing: antialiased;
        }
        a { color: var(--color-accent); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--color-accent-hover); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        button:focus, input:focus, textarea:focus { outline: 2px solid var(--color-accent); outline-offset: 2px; }
        ul, ol { padding-left: 1.25rem; }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.2; letter-spacing: -0.01em; }
        h1 { font-size: 2.8rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.4rem; }
        p { margin-bottom: 1rem; color: var(--color-text-secondary); }

        /* ===== 容器 ===== */
        .container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            background: rgba(11, 15, 26, 0.92);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(30, 42, 69, 0.5);
            padding: 0.5rem 0;
            transition: var(--transition);
        }
        .site-header .container {
            display: flex; align-items: center; justify-content: space-between; flex-wrap: nowrap;
        }
        .site-logo {
            font-size: 1.5rem; font-weight: 800; letter-spacing: -0.02em;
            color: var(--color-text); display: flex; align-items: center; gap: 0.5rem;
        }
        .site-logo i { color: var(--color-accent); font-size: 1.8rem; }
        .site-logo span { background: linear-gradient(135deg, var(--color-accent), #ffd966); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .site-logo:hover { color: var(--color-text); }
        .nav-list { display: flex; align-items: center; gap: 0.25rem; list-style: none; margin: 0; padding: 0; }
        .nav-list .nav-link {
            display: inline-flex; align-items: center; gap: 0.4rem;
            padding: 0.6rem 1.2rem; border-radius: var(--radius-sm);
            font-weight: 600; font-size: 0.95rem;
            color: var(--color-text-secondary); transition: var(--transition);
            position: relative;
        }
        .nav-list .nav-link i { font-size: 0.9rem; }
        .nav-list .nav-link:hover { color: var(--color-text); background: rgba(245, 184, 13, 0.08); }
        .nav-list .nav-link.active {
            color: var(--color-text); background: rgba(245, 184, 13, 0.12);
        }
        .nav-list .nav-link.active::after {
            content: ''; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%);
            width: 60%; height: 2px; background: var(--color-accent); border-radius: 2px;
        }
        .nav-cta {
            background: var(--color-accent); color: #0b0f1a !important;
            border-radius: var(--radius-sm); padding: 0.6rem 1.4rem !important;
            font-weight: 700; margin-left: 0.75rem;
        }
        .nav-cta:hover { background: var(--color-accent-hover); color: #0b0f1a !important; transform: translateY(-1px); }
        .nav-toggle { display: none; background: none; border: none; color: var(--color-text); font-size: 1.6rem; cursor: pointer; padding: 0.25rem; }

        /* ===== Hero ===== */
        .hero {
            min-height: 92vh; display: flex; align-items: center; justify-content: center;
            position: relative; overflow: hidden; padding: 7rem 0 4rem;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        }
        .hero::before {
            content: ''; position: absolute; inset: 0;
            background: radial-gradient(ellipse at 30% 40%, rgba(11,15,26,0.55) 0%, rgba(11,15,26,0.88) 100%);
            z-index: 1;
        }
        .hero::after {
            content: ''; position: absolute; inset: 0;
            background: linear-gradient(180deg, transparent 60%, var(--color-bg) 100%);
            z-index: 1;
        }
        .hero .container { position: relative; z-index: 2; text-align: center; }
        .hero h1 {
            font-size: 3.6rem; font-weight: 800; letter-spacing: -0.03em;
            text-shadow: 0 4px 30px rgba(0,0,0,0.5);
            margin-bottom: 1rem; line-height: 1.1;
        }
        .hero h1 .highlight { background: linear-gradient(135deg, var(--color-accent), #ffd966); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .hero p {
            font-size: 1.25rem; color: rgba(240, 244, 248, 0.75);
            max-width: 640px; margin: 0 auto 2.5rem;
        }
        .hero-actions { display: flex; align-items: center; justify-content: center; gap: 1rem; flex-wrap: wrap; }
        .hero-actions .btn-primary-custom {
            background: var(--color-accent); color: #0b0f1a; border: none;
            padding: 0.9rem 2.8rem; border-radius: var(--radius-md);
            font-weight: 700; font-size: 1.1rem; transition: var(--transition);
            box-shadow: 0 0 40px rgba(245,184,13,0.2);
        }
        .hero-actions .btn-primary-custom:hover { background: var(--color-accent-hover); transform: translateY(-3px); box-shadow: 0 0 60px rgba(245,184,13,0.35); }
        .hero-actions .btn-outline-custom {
            background: transparent; color: var(--color-text); border: 1.5px solid rgba(240,244,248,0.25);
            padding: 0.9rem 2.4rem; border-radius: var(--radius-md);
            font-weight: 600; font-size: 1.05rem; transition: var(--transition);
        }
        .hero-actions .btn-outline-custom:hover { background: rgba(240,244,248,0.06); border-color: var(--color-accent); color: var(--color-accent); }
        .hero-badges { display: flex; align-items: center; justify-content: center; gap: 1.5rem; margin-top: 2.5rem; flex-wrap: wrap; }
        .hero-badges .badge-item { display: flex; align-items: center; gap: 0.5rem; color: rgba(240,244,248,0.55); font-size: 0.9rem; }
        .hero-badges .badge-item i { color: var(--color-accent); font-size: 1rem; }

        /* ===== 通用板块 ===== */
        .section { padding: 5rem 0; }
        .section-title { text-align: center; margin-bottom: 3.5rem; }
        .section-title h2 { font-size: 2.2rem; font-weight: 700; margin-bottom: 0.75rem; }
        .section-title p { max-width: 540px; margin: 0 auto; color: var(--color-text-secondary); font-size: 1.05rem; }
        .section-divider { width: 60px; height: 3px; background: var(--color-accent); margin: 0.5rem auto 1.5rem; border-radius: 3px; }

        /* ===== 卡片 ===== */
        .card-custom {
            background: var(--color-surface); border: 1px solid var(--color-border);
            border-radius: var(--radius-md); padding: 1.8rem; transition: var(--transition);
            height: 100%; position: relative; overflow: hidden;
        }
        .card-custom:hover { background: var(--color-surface-hover); border-color: rgba(245,184,13,0.2); transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .card-custom .card-icon { font-size: 2.2rem; color: var(--color-accent); margin-bottom: 1rem; }
        .card-custom h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 0.6rem; }
        .card-custom p { color: var(--color-text-secondary); font-size: 0.95rem; margin-bottom: 0; }
        .card-custom .badge-tag {
            display: inline-block; background: rgba(245,184,13,0.12); color: var(--color-accent);
            padding: 0.2rem 0.8rem; border-radius: 20px; font-size: 0.75rem; font-weight: 600;
            margin-bottom: 0.75rem;
        }

        /* ===== 统计数据 ===== */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
        .stat-item {
            text-align: center; background: var(--color-surface); border: 1px solid var(--color-border);
            border-radius: var(--radius-md); padding: 2rem 1rem; transition: var(--transition);
        }
        .stat-item:hover { border-color: rgba(245,184,13,0.2); transform: translateY(-2px); }
        .stat-item .stat-number { font-size: 2.6rem; font-weight: 800; color: var(--color-accent); line-height: 1; }
        .stat-item .stat-label { color: var(--color-text-secondary); font-size: 0.95rem; margin-top: 0.5rem; }
        .stat-item .stat-icon { font-size: 1.4rem; color: var(--color-accent); opacity: 0.4; margin-bottom: 0.5rem; }

        /* ===== 图文区块 ===== */
        .feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2.5rem; align-items: center; }
        .feature-image { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
        .feature-image img { width: 100%; height: auto; display: block; }
        .feature-content h2 { margin-bottom: 1rem; }
        .feature-content ul { list-style: none; padding: 0; margin: 1.5rem 0 0; }
        .feature-content ul li { display: flex; align-items: flex-start; gap: 0.75rem; margin-bottom: 0.8rem; color: var(--color-text-secondary); }
        .feature-content ul li i { color: var(--color-accent); font-size: 1.1rem; margin-top: 0.15rem; }

        /* ===== 内容列表 (CMS) ===== */
        .post-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.5rem; }
        .post-card {
            background: var(--color-surface); border: 1px solid var(--color-border);
            border-radius: var(--radius-md); padding: 1.5rem; transition: var(--transition);
            display: flex; flex-direction: column;
        }
        .post-card:hover { background: var(--color-surface-hover); border-color: rgba(245,184,13,0.15); transform: translateY(-3px); box-shadow: var(--shadow-md); }
        .post-card .post-category {
            display: inline-block; background: rgba(245,184,13,0.1); color: var(--color-accent);
            padding: 0.15rem 0.7rem; border-radius: 20px; font-size: 0.75rem; font-weight: 600;
            align-self: flex-start; margin-bottom: 0.5rem;
        }
        .post-card h3 { font-size: 1.1rem; font-weight: 700; margin-bottom: 0.5rem; }
        .post-card h3 a { color: var(--color-text); }
        .post-card h3 a:hover { color: var(--color-accent); }
        .post-card p { font-size: 0.9rem; color: var(--color-text-secondary); flex-grow: 1; margin-bottom: 0.75rem; }
        .post-card .post-meta { display: flex; align-items: center; justify-content: space-between; font-size: 0.8rem; color: var(--color-text-muted); border-top: 1px solid var(--color-border); padding-top: 0.75rem; }
        .post-card .post-meta i { margin-right: 0.35rem; }
        .empty-state { text-align: center; padding: 3rem 1rem; color: var(--color-text-muted); }
        .empty-state i { font-size: 3rem; color: var(--color-border); margin-bottom: 1rem; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 780px; margin: 0 auto; }
        .faq-item {
            background: var(--color-surface); border: 1px solid var(--color-border);
            border-radius: var(--radius-md); padding: 1.4rem 1.8rem; margin-bottom: 0.75rem;
            transition: var(--transition); cursor: pointer;
        }
        .faq-item:hover { border-color: rgba(245,184,13,0.15); }
        .faq-item .faq-q { display: flex; align-items: center; justify-content: space-between; font-weight: 600; font-size: 1.05rem; }
        .faq-item .faq-q i { color: var(--color-accent); transition: var(--transition); }
        .faq-item .faq-a { margin-top: 0.75rem; color: var(--color-text-secondary); font-size: 0.95rem; display: none; }
        .faq-item.open .faq-a { display: block; }
        .faq-item.open .faq-q i { transform: rotate(180deg); }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #131b2e 0%, #1e2a45 100%);
            border-radius: var(--radius-lg); padding: 4rem 3rem; text-align: center;
            border: 1px solid rgba(245,184,13,0.08); position: relative; overflow: hidden;
        }
        .cta-section::before {
            content: ''; position: absolute; width: 300px; height: 300px;
            background: radial-gradient(circle, rgba(245,184,13,0.05) 0%, transparent 70%);
            top: -100px; right: -100px; border-radius: 50%;
        }
        .cta-section h2 { font-size: 2rem; margin-bottom: 0.75rem; }
        .cta-section p { color: var(--color-text-secondary); max-width: 480px; margin: 0 auto 2rem; }
        .cta-section .btn-cta {
            background: var(--color-accent); color: #0b0f1a; border: none;
            padding: 0.9rem 3rem; border-radius: var(--radius-md);
            font-weight: 700; font-size: 1.1rem; transition: var(--transition);
            box-shadow: 0 0 40px rgba(245,184,13,0.15);
        }
        .cta-section .btn-cta:hover { background: var(--color-accent-hover); transform: translateY(-3px); box-shadow: 0 0 60px rgba(245,184,13,0.3); }

        /* ===== 页脚 ===== */
        .site-footer {
            border-top: 1px solid var(--color-border); padding: 3rem 0 2rem;
            margin-top: 3rem;
        }
        .site-footer .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2rem; }
        .site-footer .footer-brand .site-logo { margin-bottom: 0.75rem; }
        .site-footer .footer-brand p { font-size: 0.9rem; color: var(--color-text-muted); max-width: 280px; }
        .site-footer h4 { font-size: 1rem; font-weight: 700; margin-bottom: 1rem; }
        .site-footer ul { list-style: none; padding: 0; margin: 0; }
        .site-footer ul li { margin-bottom: 0.5rem; }
        .site-footer ul li a { color: var(--color-text-secondary); font-size: 0.9rem; }
        .site-footer ul li a:hover { color: var(--color-accent); }
        .site-footer .footer-bottom { border-top: 1px solid var(--color-border); margin-top: 2rem; padding-top: 1.5rem; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem; }
        .site-footer .footer-bottom p { font-size: 0.85rem; color: var(--color-text-muted); margin: 0; }
        .site-footer .footer-socials { display: flex; gap: 0.75rem; }
        .site-footer .footer-socials a { color: var(--color-text-muted); font-size: 1.2rem; }
        .site-footer .footer-socials a:hover { color: var(--color-accent); }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            h1 { font-size: 2.4rem; }
            .hero h1 { font-size: 2.8rem; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .feature-grid { grid-template-columns: 1fr; }
            .site-footer .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 768px) {
            .nav-toggle { display: block; }
            .nav-list { display: none; flex-direction: column; width: 100%; background: var(--color-primary); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 0.5rem; margin-top: 0.5rem; }
            .nav-list.open { display: flex; }
            .nav-list .nav-link { width: 100%; padding: 0.75rem 1rem; }
            .nav-list .nav-link.active::after { display: none; }
            .nav-cta { margin-left: 0; margin-top: 0.25rem; text-align: center; }
            .site-header .container { flex-wrap: wrap; }
            .hero h1 { font-size: 2.2rem; }
            .hero p { font-size: 1rem; }
            .section-title h2 { font-size: 1.8rem; }
            .stat-item .stat-number { font-size: 2rem; }
            .post-list { grid-template-columns: 1fr; }
            .cta-section { padding: 3rem 1.5rem; }
            .site-footer .footer-grid { grid-template-columns: 1fr; }
            .site-footer .footer-bottom { flex-direction: column; text-align: center; }
            .feature-grid { gap: 1.5rem; }
        }

        @media (max-width: 520px) {
            .hero h1 { font-size: 1.8rem; }
            .hero-actions { flex-direction: column; }
            .hero-actions .btn-primary-custom, .hero-actions .btn-outline-custom { width: 100%; text-align: center; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 0.75rem; }
            .stat-item { padding: 1.25rem 0.75rem; }
            .stat-item .stat-number { font-size: 1.6rem; }
            .section { padding: 3rem 0; }
            .card-custom { padding: 1.25rem; }
            .faq-item { padding: 1rem 1.25rem; }
            .cta-section h2 { font-size: 1.5rem; }
        }

        /* ===== 额外 utility ===== */
        .text-accent { color: var(--color-accent); }
        .bg-surface { background: var(--color-surface); }
        .border-accent { border-color: var(--color-accent); }
        .gap-1 { gap: 1rem; }
        .gap-2 { gap: 1.5rem; }
        .mt-1 { margin-top: 1rem; }
        .mt-2 { margin-top: 2rem; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e74c3c;
            --primary-dark: #c0392b;
            --primary-light: #f1948a;
            --accent: #f39c12;
            --accent-dark: #e67e22;
            --bg-dark: #0b0e14;
            --bg-darker: #070a0f;
            --bg-card: #131a24;
            --bg-card-hover: #1a2330;
            --bg-section: #0f151e;
            --bg-section-alt: #141c28;
            --text-main: #e8edf3;
            --text-muted: #8a9bb5;
            --text-dim: #5a6d85;
            --border-color: #1e2a3a;
            --border-light: #2a3a4e;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
            --shadow-hover: 0 12px 48px rgba(231, 76, 60, 0.2);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-base: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-base);
            background: var(--bg-dark);
            color: var(--text-main);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

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

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

        /* ===== Header / Nav ===== */
        .site-header {
            background: rgba(11, 14, 20, 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;
            height: 70px;
            display: flex;
            align-items: center;
        }

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

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-main);
            text-decoration: none;
            letter-spacing: -0.5px;
        }
        .site-logo i {
            color: var(--primary);
            font-size: 1.8rem;
        }
        .site-logo span {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .site-logo:hover {
            color: var(--text-main);
            opacity: 0.9;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-main);
            font-size: 1.6rem;
            cursor: pointer;
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: var(--bg-card);
        }

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

        .nav-list li a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            text-decoration: none;
            position: relative;
        }
        .nav-list li a i {
            font-size: 0.9rem;
        }
        .nav-list li a:hover {
            color: var(--text-main);
            background: var(--bg-card);
        }
        .nav-list li a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 16px rgba(231, 76, 60, 0.35);
        }
        .nav-list li a.nav-cta {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            font-weight: 600;
            padding: 8px 22px;
            border-radius: 50px;
            box-shadow: 0 4px 20px rgba(231, 76, 60, 0.3);
        }
        .nav-list li a.nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(231, 76, 60, 0.45);
        }

        /* ===== Hero / Banner ===== */
        .article-banner {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--bg-darker) 0%, var(--bg-section) 100%);
            border-bottom: 1px solid var(--border-color);
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.12;
            z-index: 0;
        }
        .article-banner .container {
            position: relative;
            z-index: 1;
        }
        .article-banner .breadcrumb {
            background: none;
            padding: 0;
            margin-bottom: 20px;
            font-size: 0.9rem;
        }
        .article-banner .breadcrumb a {
            color: var(--text-muted);
        }
        .article-banner .breadcrumb a:hover {
            color: var(--primary-light);
        }
        .article-banner .breadcrumb .active {
            color: var(--text-dim);
        }
        .article-banner h1 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.25;
            margin-bottom: 16px;
            max-width: 900px;
        }
        .article-banner .meta-line {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            align-items: center;
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .article-banner .meta-line .badge {
            background: var(--primary);
            color: #fff;
            padding: 4px 14px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.8rem;
        }
        .article-banner .meta-line i {
            margin-right: 5px;
            color: var(--accent);
        }

        /* ===== Article Main ===== */
        .article-main {
            padding: 60px 0 80px;
            background: var(--bg-dark);
        }

        .article-content {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 40px 48px;
            box-shadow: var(--shadow);
        }

        .article-content .lead {
            font-size: 1.15rem;
            color: var(--text-muted);
            border-left: 4px solid var(--primary);
            padding-left: 20px;
            margin-bottom: 32px;
            line-height: 1.8;
        }

        .article-body {
            color: var(--text-main);
            line-height: 1.9;
            font-size: 1.05rem;
        }
        .article-body h2 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-top: 40px;
            margin-bottom: 16px;
            color: #fff;
        }
        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin-top: 32px;
            margin-bottom: 12px;
            color: var(--accent);
        }
        .article-body p {
            margin-bottom: 18px;
        }
        .article-body ul,
        .article-body ol {
            margin-bottom: 18px;
            padding-left: 24px;
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .article-body img {
            border-radius: var(--radius);
            margin: 24px 0;
            box-shadow: var(--shadow);
        }
        .article-body blockquote {
            border-left: 4px solid var(--accent);
            background: var(--bg-section);
            padding: 16px 24px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 24px 0;
            color: var(--text-muted);
            font-style: italic;
        }
        .article-body code {
            background: var(--bg-darker);
            color: var(--accent);
            padding: 2px 10px;
            border-radius: 4px;
            font-size: 0.9rem;
        }

        .article-footer-meta {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }
        .article-footer-meta .tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .article-footer-meta .tags span {
            background: var(--bg-section);
            color: var(--text-muted);
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            border: 1px solid var(--border-color);
        }
        .article-footer-meta .share-links {
            display: flex;
            gap: 10px;
        }
        .article-footer-meta .share-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--bg-section);
            color: var(--text-muted);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .article-footer-meta .share-links a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        /* ===== Related Posts ===== */
        .related-section {
            padding: 60px 0;
            background: var(--bg-section);
            border-top: 1px solid var(--border-color);
        }
        .related-section h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 36px;
            color: #fff;
            text-align: center;
        }
        .related-section h2 i {
            color: var(--primary);
            margin-right: 10px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            overflow: hidden;
            transition: var(--transition);
            text-decoration: none;
            color: var(--text-main);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
            color: var(--text-main);
        }
        .related-card .card-img {
            height: 180px;
            background: var(--bg-section-alt);
            overflow: hidden;
        }
        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
            border-radius: 0;
        }
        .related-card:hover .card-img img {
            transform: scale(1.05);
        }
        .related-card .card-body {
            padding: 20px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card .card-body h3 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: #fff;
            line-height: 1.4;
        }
        .related-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            flex: 1;
            margin-bottom: 12px;
        }
        .related-card .card-body .meta {
            font-size: 0.8rem;
            color: var(--text-dim);
            display: flex;
            gap: 12px;
        }
        .related-card .card-body .meta i {
            color: var(--accent);
            margin-right: 4px;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 70px 0;
            background: linear-gradient(135deg, var(--bg-darker) 0%, var(--bg-section-alt) 100%);
            border-top: 1px solid var(--border-color);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }
        .cta-section p {
            color: var(--text-muted);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-download {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            padding: 16px 44px;
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            border: none;
            border-radius: 50px;
            text-decoration: none;
            box-shadow: 0 8px 32px rgba(231, 76, 60, 0.35);
            transition: var(--transition);
        }
        .cta-section .btn-download:hover {
            transform: translateY(-4px) scale(1.02);
            box-shadow: 0 12px 48px rgba(231, 76, 60, 0.5);
            color: #fff;
        }
        .cta-section .btn-download i {
            font-size: 1.3rem;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-darker);
            border-top: 1px solid var(--border-color);
            padding: 56px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .site-logo {
            margin-bottom: 14px;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            max-width: 320px;
            line-height: 1.7;
        }
        .site-footer h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .site-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer ul li {
            margin-bottom: 10px;
        }
        .site-footer ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: var(--transition);
            text-decoration: none;
        }
        .site-footer ul li a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }
        .footer-bottom p {
            color: var(--text-dim);
            font-size: 0.85rem;
            margin: 0;
        }
        .footer-socials {
            display: flex;
            gap: 12px;
        }
        .footer-socials a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--bg-card);
            color: var(--text-muted);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .footer-socials a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        /* ===== Article Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 24px;
        }
        .not-found-box i {
            font-size: 4rem;
            color: var(--text-dim);
            margin-bottom: 24px;
        }
        .not-found-box h2 {
            font-size: 1.8rem;
            color: #fff;
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .not-found-box .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: var(--primary);
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition);
        }
        .not-found-box .btn-back:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            color: #fff;
        }

        /* ===== JSON-LD ===== */
        .json-ld {
            display: none;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .site-header {
                height: 64px;
            }
            .nav-toggle {
                display: block;
            }
            .nav-list {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(11, 14, 20, 0.98);
                flex-direction: column;
                padding: 16px 24px;
                border-bottom: 1px solid var(--border-color);
                backdrop-filter: blur(20px);
                box-shadow: var(--shadow);
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list li a {
                width: 100%;
                padding: 12px 16px;
                font-size: 1rem;
            }
            .nav-list li a.nav-cta {
                margin-top: 8px;
                text-align: center;
                justify-content: center;
            }

            .article-banner {
                padding: 50px 0 40px;
            }
            .article-banner h1 {
                font-size: 1.6rem;
            }

            .article-content {
                padding: 24px 20px;
                border-radius: var(--radius);
            }
            .article-content .lead {
                font-size: 1rem;
                padding-left: 14px;
            }
            .article-body {
                font-size: 0.98rem;
            }
            .article-body h2 {
                font-size: 1.3rem;
            }
            .article-body h3 {
                font-size: 1.1rem;
            }

            .related-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .related-section h2 {
                font-size: 1.4rem;
            }

            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section .btn-download {
                padding: 14px 32px;
                font-size: 1rem;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .article-footer-meta {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .article-banner h1 {
                font-size: 1.3rem;
            }
            .article-banner .meta-line {
                font-size: 0.8rem;
                gap: 10px;
            }
            .article-content {
                padding: 18px 14px;
            }
            .article-body {
                font-size: 0.92rem;
            }
            .article-body h2 {
                font-size: 1.15rem;
            }
            .cta-section h2 {
                font-size: 1.2rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
            .related-card .card-img {
                height: 140px;
            }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e74c3c;
            --primary-dark: #c0392b;
            --primary-light: #f1948a;
            --secondary: #2c3e50;
            --secondary-light: #34495e;
            --accent: #f39c12;
            --bg-dark: #0a0e17;
            --bg-card: #111827;
            --bg-section: #0f1420;
            --text-light: #f1f5f9;
            --text-muted: #94a3b8;
            --text-dark: #1e293b;
            --border-color: rgba(255, 255, 255, 0.06);
            --border-light: rgba(255, 255, 255, 0.12);
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.3);
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
            --container-max: 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);
            background: var(--bg-dark);
            color: var(--text-light);
            line-height: 1.7;
            font-size: 1rem;
            overflow-x: hidden;
        }

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

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

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

        ul {
            list-style: none;
        }

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

        /* ===== Typography ===== */
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-light);
            letter-spacing: -0.01em;
        }

        .section-title {
            font-size: 2.2rem;
            margin-bottom: 0.5rem;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto 2.5rem auto;
            text-align: center;
        }
        .section-header {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-header .section-title i {
            color: var(--primary);
            margin-right: 10px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-h);
            background: rgba(10, 14, 23, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-color);
            z-index: 1000;
            transition: background var(--transition), box-shadow var(--transition);
        }
        .site-header.scrolled {
            background: rgba(10, 14, 23, 0.96);
            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%;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-light);
            text-decoration: none;
            letter-spacing: -0.02em;
        }
        .site-logo i {
            color: var(--primary);
            font-size: 1.6rem;
            filter: drop-shadow(0 0 8px rgba(231, 76, 60, 0.3));
        }
        .site-logo span {
            background: linear-gradient(135deg, #f1f5f9, #e2e8f0);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .site-logo:hover {
            color: var(--text-light);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-light);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 6px 10px;
            border-radius: 8px;
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
            margin: 0;
            padding: 0;
        }
        .nav-list li {
            list-style: none;
        }
        .nav-link {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 10px;
            font-weight: 500;
            font-size: 0.92rem;
            color: var(--text-muted);
            transition: all var(--transition);
            background: transparent;
            border: none;
            text-decoration: none;
        }
        .nav-link i {
            font-size: 0.85rem;
        }
        .nav-link:hover {
            color: var(--text-light);
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-link.active {
            color: var(--text-light);
            background: rgba(231, 76, 60, 0.15);
            box-shadow: inset 0 0 0 1px rgba(231, 76, 60, 0.25);
        }
        .nav-link:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .nav-cta {
            background: var(--primary) !important;
            color: #fff !important;
            padding: 8px 22px;
            border-radius: 10px;
            font-weight: 600;
            box-shadow: 0 4px 16px rgba(231, 76, 60, 0.3);
        }
        .nav-cta:hover {
            background: var(--primary-dark) !important;
            box-shadow: 0 6px 24px rgba(231, 76, 60, 0.45);
            transform: translateY(-1px);
        }

        /* ===== Hero / Banner ===== */
        .page-banner {
            margin-top: var(--header-h);
            padding: 80px 0 60px;
            background: linear-gradient(135deg, #0a0e17 0%, #1a0a0a 50%, #0f1420 100%);
            border-bottom: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.12;
            pointer-events: none;
        }
        .page-banner .container {
            position: relative;
            z-index: 1;
        }
        .page-banner h1 {
            font-size: 2.8rem;
            font-weight: 800;
            margin-bottom: 0.75rem;
            letter-spacing: -0.02em;
        }
        .page-banner h1 i {
            color: var(--primary);
            margin-right: 12px;
        }
        .page-banner .lead {
            font-size: 1.15rem;
            color: var(--text-muted);
            max-width: 640px;
            margin-bottom: 1.5rem;
        }
        .banner-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-light);
            border-radius: 20px;
            padding: 6px 16px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .banner-badge i {
            color: var(--accent);
        }

        /* ===== 板块通用 ===== */
        section {
            padding: 70px 0;
        }
        section.bg-alt {
            background: var(--bg-section);
        }

        /* ===== 步骤流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 24px;
            counter-reset: step-counter;
        }
        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 30px 24px;
            text-align: center;
            position: relative;
            transition: all var(--transition);
            counter-increment: step-counter;
        }
        .step-card:hover {
            border-color: var(--border-light);
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }
        .step-card .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: rgba(231, 76, 60, 0.15);
            color: var(--primary);
            font-size: 1.2rem;
            font-weight: 800;
            margin-bottom: 16px;
            border: 1px solid rgba(231, 76, 60, 0.25);
        }
        .step-card .step-number::before {
            content: counter(step-counter);
        }
        .step-card h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin: 0;
        }
        .step-card i.step-icon {
            font-size: 2rem;
            color: var(--primary-light);
            margin-bottom: 12px;
            display: block;
        }

        /* ===== 版本选择卡片 ===== */
        .version-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }
        .version-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .version-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: opacity var(--transition);
        }
        .version-card:hover::before {
            opacity: 1;
        }
        .version-card:hover {
            border-color: var(--border-light);
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }
        .version-card .version-icon {
            font-size: 2.6rem;
            color: var(--primary);
            margin-bottom: 16px;
        }
        .version-card h3 {
            font-size: 1.2rem;
            margin-bottom: 6px;
        }
        .version-card .version-tag {
            display: inline-block;
            background: rgba(231, 76, 60, 0.12);
            color: var(--primary-light);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 2px 14px;
            border-radius: 20px;
            margin-bottom: 12px;
            border: 1px solid rgba(231, 76, 60, 0.2);
        }
        .version-card p {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin-bottom: 16px;
        }
        .version-card .btn-download {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 10px 28px;
            border-radius: 10px;
            font-weight: 600;
            font-size: 0.92rem;
            transition: all var(--transition);
            text-decoration: none;
        }
        .version-card .btn-download:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(231, 76, 60, 0.35);
        }
        .version-card .btn-download i {
            font-size: 0.85rem;
        }

        /* ===== 安全提示 ===== */
        .safety-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 20px;
        }
        .safety-item {
            display: flex;
            gap: 16px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 20px 22px;
            transition: all var(--transition);
        }
        .safety-item:hover {
            border-color: var(--border-light);
            background: rgba(17, 24, 39, 0.8);
        }
        .safety-item .safety-icon {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(231, 76, 60, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--primary);
        }
        .safety-item .safety-text h4 {
            font-size: 1rem;
            margin-bottom: 4px;
        }
        .safety-item .safety-text p {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin: 0;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            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);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-light);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            cursor: pointer;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-light);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            gap: 12px;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(255, 255, 255, 0.02);
        }
        .faq-question:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: -2px;
        }
        .faq-question i {
            color: var(--primary);
            font-size: 0.9rem;
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 22px;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 18px;
        }
        .faq-answer p {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin: 0;
        }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, #1a0a0a 0%, #0f1420 50%, #0a0e17 100%);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 56px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: 0.06;
            pointer-events: none;
        }
        .cta-block .container {
            position: relative;
            z-index: 1;
        }
        .cta-block h2 {
            font-size: 2rem;
            margin-bottom: 12px;
        }
        .cta-block p {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 540px;
            margin: 0 auto 28px;
        }
        .cta-block .btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
        }
        .btn-primary-custom {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 14px 36px;
            border-radius: 12px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: all var(--transition);
            text-decoration: none;
            box-shadow: 0 4px 20px rgba(231, 76, 60, 0.3);
        }
        .btn-primary-custom:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(231, 76, 60, 0.45);
            color: #fff;
        }
        .btn-outline-custom {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: transparent;
            color: var(--text-light);
            border: 1px solid var(--border-light);
            padding: 14px 36px;
            border-radius: 12px;
            font-weight: 600;
            font-size: 1.05rem;
            transition: all var(--transition);
            text-decoration: none;
        }
        .btn-outline-custom:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: var(--text-muted);
            color: var(--text-light);
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #060a12;
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .site-logo {
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 0.92rem;
            color: var(--text-muted);
            max-width: 320px;
            line-height: 1.6;
        }
        .site-footer h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-light);
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }
        .site-footer ul li {
            margin-bottom: 8px;
        }
        .site-footer ul li a {
            font-size: 0.9rem;
            color: var(--text-muted);
            transition: color var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .site-footer ul li a:hover {
            color: var(--primary-light);
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            padding-top: 28px;
            border-top: 1px solid var(--border-color);
        }
        .footer-bottom p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin: 0;
        }
        .footer-socials {
            display: flex;
            gap: 12px;
        }
        .footer-socials a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-muted);
            font-size: 1rem;
            transition: all var(--transition);
            border: 1px solid var(--border-color);
        }
        .footer-socials a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .page-banner h1 {
                font-size: 2.2rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: block;
            }
            .nav-list {
                display: none;
                position: absolute;
                top: var(--header-h);
                left: 0;
                width: 100%;
                background: rgba(10, 14, 23, 0.98);
                backdrop-filter: blur(18px);
                flex-direction: column;
                padding: 16px 24px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
            }
            .nav-list.open {
                display: flex;
            }
            .nav-link {
                padding: 12px 16px;
                width: 100%;
                border-radius: 10px;
            }
            .nav-cta {
                margin-top: 6px;
                text-align: center;
                justify-content: center;
            }

            .page-banner {
                padding: 60px 0 40px;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .page-banner .lead {
                font-size: 1rem;
            }

            .section-title {
                font-size: 1.5rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
            }

            section {
                padding: 50px 0;
            }

            .steps-grid {
                grid-template-columns: 1fr 1fr;
            }
            .version-grid {
                grid-template-columns: 1fr;
            }
            .safety-grid {
                grid-template-columns: 1fr;
            }

            .cta-block {
                padding: 40px 24px;
            }
            .cta-block h2 {
                font-size: 1.5rem;
            }
            .cta-block .btn-group {
                flex-direction: column;
                align-items: center;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .page-banner h1 {
                font-size: 1.5rem;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .banner-badges {
                flex-wrap: wrap;
            }
            .version-card {
                padding: 24px 18px;
            }
            .btn-primary-custom,
            .btn-outline-custom {
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== 图片圆角辅助 ===== */
        .img-rounded {
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-sm);
        }

        /* ===== 滚动条美化 ===== */
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-dark);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--secondary-light);
            border-radius: 4px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-muted);
        }

        /* ===== 选中高亮 ===== */
        ::selection {
            background: rgba(231, 76, 60, 0.35);
            color: #fff;
        }