/* roulang page: index */
:root {
            --primary: #1C1E21;
            --accent: #C8873A;
            --accent-dark: #A96E2A;
            --safe: #2E6E5E;
            --safe-light: #E8F0ED;
            --bg: #F4F0E8;
            --card-bg: #FFFFFF;
            --text: #202124;
            --text-secondary: #6B6F76;
            --border: #E5E0D5;
            --warning: #B44B3A;
            --warning-light: #F9EDEB;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 12px rgba(28, 30, 33, 0.06);
            --shadow-md: 0 8px 24px rgba(28, 30, 33, 0.12);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            --font-num: "DIN Alternate", "Roboto", "PingFang SC", sans-serif;
            --max-width: 1180px;
            --section-pad: 72px 24px;
            --transition: 0.25s ease;
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.85;
            color: var(--text);
            background: var(--bg);
            min-height: 100vh;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent); }
        a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
        button { font-family: inherit; cursor: pointer; border: none; background: none; }
        ul, ol { list-style: none; }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .section { padding: var(--section-pad); }
        .section-alt { background: #FFFFFF; }
        .section-tight { padding: 48px 24px; }
        .section-divider { border-top: 1px solid var(--border); }

        /* Typography */
        h1, h2, h3, h4 { font-weight: 700; line-height: 1.35; color: var(--primary); }
        h1 { font-size: 34px; letter-spacing: -0.5px; }
        h2 { font-size: 26px; letter-spacing: -0.3px; }
        h3 { font-size: 19px; }
        h4 { font-size: 16px; }
        .section-label {
            display: inline-flex; align-items: center; gap: 8px;
            font-size: 13px; font-weight: 600; letter-spacing: 1.5px;
            color: var(--accent); text-transform: uppercase; margin-bottom: 12px;
        }
        .section-label::before { content: ''; width: 20px; height: 2px; background: var(--accent); border-radius: 2px; }
        .section-title { margin-bottom: 16px; }
        .section-desc { color: var(--text-secondary); font-size: 15px; max-width: 720px; margin-bottom: 32px; }

        /* Buttons */
        .btn {
            display: inline-flex; align-items: center; justify-content: center; gap: 8px;
            padding: 13px 28px; border-radius: var(--radius-sm);
            font-size: 15px; font-weight: 600; letter-spacing: 0.3px;
            transition: all var(--transition); min-height: 44px;
            white-space: nowrap; line-height: 1.4;
        }
        .btn-primary {
            background: var(--primary); color: #FFFFFF;
            box-shadow: 0 2px 8px rgba(28, 30, 33, 0.18);
        }
        .btn-primary:hover {
            background: #000000; color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn-outline {
            background: transparent; color: var(--primary);
            border: 1.5px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary); color: #FFFFFF;
            transform: translateY(-2px);
        }
        .btn-accent {
            background: var(--accent); color: #FFFFFF;
            box-shadow: 0 2px 10px rgba(200, 135, 58, 0.25);
        }
        .btn-accent:hover {
            background: var(--accent-dark); color: #FFFFFF;
            transform: translateY(-2px);
        }
        .btn-text {
            color: var(--primary); font-weight: 600; padding: 6px 0;
            display: inline-flex; align-items: center; gap: 6px;
            border-bottom: 1.5px solid transparent; transition: all var(--transition);
        }
        .btn-text::after { content: '→'; font-weight: 700; transition: transform var(--transition); }
        .btn-text:hover { color: var(--accent); border-bottom-color: var(--accent); }
        .btn-text:hover::after { transform: translateX(4px); }

        /* Badge & Tag */
        .badge {
            display: inline-flex; align-items: center; gap: 6px;
            padding: 4px 12px; border-radius: 999px;
            font-size: 12px; font-weight: 600; letter-spacing: 0.5px;
            background: #F7EFE6; color: var(--accent-dark);
        }
        .badge-safe {
            background: var(--safe-light); color: var(--safe);
        }
        .badge-gray {
            background: #F0EEE9; color: var(--text-secondary);
        }
        .badge-warning {
            background: var(--warning-light); color: var(--warning);
        }

        /* Header / Navigation */
        .site-header {
            position: sticky; top: 0; z-index: 100;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
        }
        .site-header .container {
            display: flex; align-items: center; justify-content: space-between;
            height: 68px; padding-top: 0; padding-bottom: 0;
        }
        .logo {
            display: flex; align-items: center; gap: 10px;
            font-size: 18px; font-weight: 700; color: var(--primary);
            letter-spacing: -0.3px; flex-shrink: 0;
        }
        .logo-mark {
            width: 34px; height: 34px; border-radius: 8px;
            background: var(--primary); color: var(--accent);
            display: flex; align-items: center; justify-content: center;
            font-size: 14px; font-weight: 800; letter-spacing: 0;
        }
        .main-nav { display: flex; align-items: center; gap: 28px; }
        .main-nav a {
            font-size: 15px; font-weight: 500; color: var(--text-secondary);
            padding: 8px 0; border-bottom: 2px solid transparent;
            transition: all var(--transition); position: relative;
        }
        .main-nav a:hover, .main-nav a.active {
            color: var(--primary); border-bottom-color: var(--accent);
        }
        .main-nav a.active { font-weight: 600; }
        .nav-cta { flex-shrink: 0; }
        .nav-toggle {
            display: none; width: 44px; height: 44px;
            align-items: center; justify-content: center;
            border-radius: var(--radius-sm); border: 1px solid var(--border);
            background: #FFFFFF; cursor: pointer; transition: background var(--transition);
        }
        .nav-toggle:hover { background: var(--bg); }
        .nav-toggle span { display: block; width: 20px; height: 2px; background: var(--primary); position: relative; }
        .nav-toggle span::before, .nav-toggle span::after {
            content: ''; position: absolute; width: 20px; height: 2px; background: var(--primary);
            left: 0; transition: transform var(--transition);
        }
        .nav-toggle span::before { top: -6px; }
        .nav-toggle span::after { top: 6px; }

        /* Hero */
        .hero {
            position: relative; overflow: hidden;
            background: var(--bg);
            padding: 72px 24px 80px;
        }
        .hero::before {
            content: ''; position: absolute; inset: 0;
            background: linear-gradient(135deg, rgba(244, 240, 232, 0.92) 0%, rgba(244, 240, 232, 0.75) 45%, rgba(200, 135, 58, 0.12) 100%);
            z-index: 0;
        }
        .hero .container {
            position: relative; z-index: 1;
            display: grid; grid-template-columns: 1fr 1fr;
            gap: 60px; align-items: center;
        }
        .hero-content h1 {
            font-size: 34px; margin-bottom: 20px; letter-spacing: -0.5px;
            line-height: 1.3;
        }
        .hero-content h1 .highlight { color: var(--accent-dark); }
        .hero-desc {
            font-size: 16px; color: var(--text-secondary);
            margin-bottom: 32px; max-width: 520px; line-height: 1.8;
        }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; align-items: center; }
        .hero-visual { position: relative; display: flex; align-items: center; justify-content: center; }
        .hero-visual img {
            border-radius: 16px; box-shadow: var(--shadow-md);
            max-width: 340px; width: 100%; aspect-ratio: 3/4; object-fit: cover;
        }
        .hero-visual::after {
            content: ''; position: absolute; inset: 20px -12px -12px 20px;
            border: 2px solid var(--accent); border-radius: 16px; z-index: -1;
            opacity: 0.3;
        }
        .hero-float-badge {
            position: absolute; bottom: -18px; left: -18px;
            background: #FFFFFF; border: 1px solid var(--border);
            border-radius: var(--radius-sm); padding: 10px 16px;
            box-shadow: var(--shadow-sm); display: flex; align-items: center; gap: 8px;
            font-size: 13px; font-weight: 600; color: var(--safe);
        }

        /* Trust Bar */
        .trust-bar { background: #FFFFFF; border-bottom: 1px solid var(--border); }
        .trust-bar .container {
            display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
            padding: 28px 24px;
        }
        .trust-item { text-align: center; }
        .trust-num {
            font-family: var(--font-num); font-size: 30px; font-weight: 700;
            color: var(--accent-dark); letter-spacing: -0.5px; line-height: 1.2;
        }
        .trust-label { font-size: 13px; color: var(--text-secondary); margin-top: 4px; }

        /* Category Entrance */
        .category-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .cat-card {
            background: var(--card-bg); border: 1px solid var(--border);
            border-radius: var(--radius); overflow: hidden;
            transition: all var(--transition); display: flex; flex-direction: column;
        }
        .cat-card:hover {
            box-shadow: var(--shadow-md); border-color: var(--accent);
            transform: translateY(-4px);
        }
        .cat-card img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
        .cat-card-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
        .cat-card-body h3 { font-size: 18px; margin-bottom: 8px; }
        .cat-card-body p { font-size: 14px; color: var(--text-secondary); margin-bottom: 16px; flex: 1; }
        .cat-card-link { font-weight: 600; font-size: 14px; color: var(--accent-dark); display: inline-flex; align-items: center; gap: 6px; }
        .cat-card-link::after { content: '→'; transition: transform var(--transition); }
        .cat-card-link:hover { color: var(--primary); }
        .cat-card-link:hover::after { transform: translateX(4px); }

        /* Steps */
        .steps-horizontal {
            display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px;
            counter-reset: step;
        }
        .step-item {
            position: relative; padding-top: 48px;
        }
        .step-item::before {
            counter-increment: step; content: counter(step, decimal-leading-zero);
            position: absolute; top: 0; left: 0;
            font-family: var(--font-num); font-size: 36px; font-weight: 700;
            color: var(--accent); opacity: 0.5; line-height: 1;
        }
        .step-item::after {
            content: ''; position: absolute; top: 16px; left: 6px; right: 0;
            height: 1px; background: var(--border); z-index: -1;
        }
        .step-item:last-child::after { display: none; }
        .step-item h4 { font-size: 16px; margin-bottom: 6px; }
        .step-item p { font-size: 13px; color: var(--text-secondary); }

        /* Feature Matrix */
        .feature-matrix {
            display: grid; grid-template-columns: 1fr 1fr 1fr;
            gap: 24px; align-items: stretch;
        }
        .feature-main-card {
            background: var(--card-bg); border: 1px solid var(--border);
            border-radius: var(--radius); padding: 32px;
            transition: all var(--transition);
            grid-row: span 2;
        }
        .feature-main-card:hover { box-shadow: var(--shadow-md); border-color: var(--accent); }
        .feature-main-card h3 { font-size: 20px; margin-bottom: 10px; }
        .feature-main-card p { font-size: 14px; color: var(--text-secondary); }
        .feature-mini-list { display: flex; flex-direction: column; gap: 16px; }
        .feature-mini-item {
            background: var(--card-bg); border: 1px solid var(--border);
            border-radius: var(--radius-sm); padding: 18px 20px;
            display: flex; align-items: center; gap: 14px;
            transition: all var(--transition);
        }
        .feature-mini-item:hover { border-color: var(--accent); box-shadow: var(--shadow-sm); }
        .feature-mini-icon {
            width: 40px; height: 40px; border-radius: 8px; flex-shrink: 0;
            background: var(--safe-light); color: var(--safe);
            display: flex; align-items: center; justify-content: center;
            font-size: 18px; font-weight: 700;
        }
        .feature-mini-item h4 { font-size: 14px; font-weight: 600; }
        .feature-mini-item p { font-size: 12px; color: var(--text-secondary); }

        /* Phone Display Section */
        .phone-display { display: flex; flex-direction: column; gap: 48px; }
        .phone-row {
            display: grid; grid-template-columns: 1fr 1fr; gap: 48px;
            align-items: center;
        }
        .phone-row.reverse { direction: rtl; }
        .phone-row.reverse > * { direction: ltr; }
        .phone-row img {
            border-radius: var(--radius); box-shadow: var(--shadow-sm);
            max-width: 300px; width: 100%; margin: 0 auto;
            aspect-ratio: 3/4; object-fit: cover;
        }
        .phone-row-text h3 { margin-bottom: 10px; font-size: 20px; }
        .phone-row-text p { color: var(--text-secondary); font-size: 14px; }

        /* News Grid */
        .news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .news-card {
            background: var(--card-bg); border: 1px solid var(--border);
            border-radius: var(--radius); padding: 24px;
            display: flex; flex-direction: column; gap: 8px;
            transition: all var(--transition);
        }
        .news-card:hover { box-shadow: var(--shadow-md); border-color: var(--accent); transform: translateY(-3px); }
        .news-card .badge { align-self: flex-start; }
        .news-card h3 { font-size: 16px; line-height: 1.45; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .news-card p { font-size: 13px; color: var(--text-secondary); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .news-card time { font-size: 12px; color: var(--text-secondary); font-family: var(--font-num); }
        .empty-state { text-align: center; padding: 40px; color: var(--text-secondary); font-size: 15px; }

        /* Update List */
        .update-list { display: flex; flex-direction: column; gap: 16px; }
        .update-item {
            background: var(--card-bg); border: 1px solid var(--border);
            border-radius: var(--radius-sm); padding: 20px 24px;
            display: flex; align-items: flex-start; gap: 16px;
            transition: all var(--transition);
        }
        .update-item:hover { box-shadow: var(--shadow-sm); border-color: var(--accent); }
        .update-version {
            font-family: var(--font-num); font-weight: 700; font-size: 14px;
            color: var(--primary); background: #F0EEE9;
            padding: 6px 12px; border-radius: 6px; flex-shrink: 0; min-width: 56px; text-align: center;
        }
        .update-item h4 { font-size: 15px; margin-bottom: 4px; }
        .update-item p { font-size: 13px; color: var(--text-secondary); }
        .update-item time { font-size: 12px; color: var(--text-secondary); font-family: var(--font-num); flex-shrink: 0; margin-left: auto; }

        /* Testimonials */
        .testimonial-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .testimonial-card {
            background: var(--card-bg); border: 1px solid var(--border);
            border-radius: var(--radius); padding: 28px;
            position: relative;
        }
        .testimonial-card::before {
            content: '"'; font-size: 48px; font-weight: 700; color: var(--accent);
            position: absolute; top: 16px; right: 20px; opacity: 0.2; font-family: serif;
            line-height: 1;
        }
        .testimonial-role { font-size: 13px; color: var(--accent-dark); font-weight: 600; margin-bottom: 8px; }
        .testimonial-text { font-size: 14px; color: var(--text-secondary); margin-bottom: 12px; line-height: 1.75; }
        .testimonial-result { font-size: 13px; font-weight: 600; color: var(--safe); }

        /* Safety Bar */
        .safety-bar {
            background: var(--primary); color: #FFFFFF;
            padding: 48px 24px; border-radius: 0;
        }
        .safety-bar .container { display: flex; align-items: center; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
        .safety-bar h2 { color: #FFFFFF; font-size: 22px; margin-bottom: 6px; }
        .safety-bar p { color: rgba(255,255,255,0.75); font-size: 14px; }
        .safety-badges { display: flex; gap: 16px; flex-wrap: wrap; }
        .safety-badge {
            background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.2);
            border-radius: 999px; padding: 8px 18px;
            font-size: 13px; font-weight: 500; color: #FFFFFF;
            display: flex; align-items: center; gap: 6px;
        }
        .safety-badge::before { content: '✓'; color: var(--accent); font-weight: 700; }

        /* FAQ */
        .faq-list { display: flex; flex-direction: column; gap: 12px; max-width: 780px; }
        .faq-item {
            background: var(--card-bg); border: 1px solid var(--border);
            border-radius: var(--radius-sm); overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover { border-color: var(--accent); }
        .faq-item summary {
            padding: 18px 24px; cursor: pointer; font-weight: 600; font-size: 15px;
            list-style: none; display: flex; align-items: center; justify-content: space-between;
            gap: 16px; user-select: none;
        }
        .faq-item summary::-webkit-details-marker { display: none; }
        .faq-item summary::after {
            content: '+'; font-size: 20px; font-weight: 400; color: var(--accent);
            transition: transform var(--transition); flex-shrink: 0;
        }
        .faq-item[open] summary::after { content: '−'; transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px 20px; font-size: 14px; color: var(--text-secondary);
            border-left: 3px solid var(--accent); margin-left: 24px; line-height: 1.8;
        }

        /* Support CTA */
        .support-cta {
            background: var(--card-bg); border: 1px solid var(--border);
            border-radius: var(--radius); padding: 40px;
            display: flex; align-items: center; justify-content: space-between; gap: 32px;
            flex-wrap: wrap;
        }
        .support-cta h3 { font-size: 20px; margin-bottom: 6px; }
        .support-cta p { font-size: 14px; color: var(--text-secondary); }

        /* Risk Disclaimer */
        .risk-disclaimer {
            border-top: 1px solid var(--border); padding: 32px 24px;
            background: transparent; text-align: center;
        }
        .risk-disclaimer p { font-size: 12px; color: var(--text-secondary); max-width: 800px; margin: 0 auto; line-height: 1.7; }

        /* Bottom CTA */
        .bottom-cta { background: var(--accent); padding: 56px 24px; }
        .bottom-cta .container { text-align: center; }
        .bottom-cta h2 { color: #FFFFFF; font-size: 26px; margin-bottom: 8px; }
        .bottom-cta p { color: rgba(255,255,255,0.85); font-size: 15px; margin-bottom: 28px; }
        .bottom-cta .btn-primary { background: #FFFFFF; color: var(--primary); }
        .bottom-cta .btn-primary:hover { background: var(--primary); color: #FFFFFF; }
        .bottom-cta .btn-outline { border-color: #FFFFFF; color: #FFFFFF; }
        .bottom-cta .btn-outline:hover { background: #FFFFFF; color: var(--primary); }
        .bottom-cta .btn-group { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

        /* Footer */
        .site-footer {
            background: var(--primary); color: rgba(255,255,255,0.8);
            padding: 56px 24px 0;
        }
        .site-footer .container { padding-bottom: 40px; }
        .footer-grid {
            display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
        }
        .footer-brand h3 { color: #FFFFFF; font-size: 18px; margin-bottom: 12px; }
        .footer-brand p { font-size: 13px; line-height: 1.7; color: rgba(255,255,255,0.6); max-width: 300px; }
        .footer-col h4 { color: #FFFFFF; font-size: 14px; margin-bottom: 16px; font-weight: 600; }
        .footer-col a { display: block; font-size: 13px; color: rgba(255,255,255,0.6); padding: 4px 0; transition: color var(--transition); }
        .footer-col a:hover { color: var(--accent); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding: 20px 24px;
            text-align: center;
            font-size: 12px; color: rgba(255,255,255,0.45);
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--accent); }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero .container { grid-template-columns: 1fr; gap: 40px; text-align: center; }
            .hero-desc { margin-left: auto; margin-right: auto; }
            .hero-actions { justify-content: center; }
            .hero-visual { max-width: 300px; margin: 0 auto; }
            .category-grid { grid-template-columns: 1fr; }
            .steps-horizontal { grid-template-columns: 1fr 1fr; gap: 32px; }
            .feature-matrix { grid-template-columns: 1fr 1fr; }
            .feature-main-card { grid-row: auto; }
            .phone-row { grid-template-columns: 1fr; gap: 24px; text-align: center; }
            .phone-row.reverse { direction: ltr; }
            .phone-row.reverse > * { direction: ltr; }
            .news-grid { grid-template-columns: 1fr 1fr; }
            .testimonial-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .site-header .container { height: 60px; }
            .main-nav { display: none; position: absolute; top: 60px; left: 0; right: 0; background: #FFFFFF; border-bottom: 1px solid var(--border); flex-direction: column; padding: 16px 24px; gap: 0; }
            .main-nav.open { display: flex; }
            .main-nav a { padding: 14px 0; border-bottom: 1px solid var(--border); width: 100%; }
            .main-nav a:last-child { border-bottom: none; }
            .nav-toggle { display: flex; }
            .nav-cta { display: none; }
            .trust-bar .container { grid-template-columns: 1fr 1fr; gap: 16px; }
            .steps-horizontal { grid-template-columns: 1fr; gap: 24px; }
            .feature-matrix { grid-template-columns: 1fr; }
            .news-grid { grid-template-columns: 1fr; }
            .safety-bar .container { flex-direction: column; text-align: center; }
            .safety-badges { justify-content: center; }
            h1 { font-size: 26px; }
            h2 { font-size: 22px; }
            .section { padding: 48px 16px; }
            .hero { padding: 48px 16px 60px; }
            .hero-content h1 { font-size: 24px; }
            .bottom-cta h2 { font-size: 22px; }
            .support-cta { padding: 28px 20px; text-align: center; flex-direction: column; }
            .update-item { flex-wrap: wrap; }
            .update-item time { margin-left: 0; width: 100%; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .section { padding: 36px 16px; }
            .hero { padding: 36px 16px 48px; }
            .hero-visual img { max-width: 240px; }
            .trust-bar .container { grid-template-columns: 1fr; gap: 20px; }
            .btn { padding: 12px 20px; font-size: 14px; width: 100%; }
            .hero-actions { flex-direction: column; width: 100%; }
            .hero-actions .btn { width: 100%; }
            .bottom-cta .btn-group { flex-direction: column; }
            .bottom-cta .btn { width: 100%; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .faq-item summary { font-size: 14px; padding: 14px 16px; }
            .faq-answer { margin-left: 16px; padding: 0 16px 16px; }
        }

/* roulang page: article */
:root {
            --primary: #1C1E21;
            --accent: #C8873A;
            --accent-dark: #A96E2A;
            --safe: #2E6E5E;
            --safe-light: #E8F0ED;
            --bg: #F4F0E8;
            --card-bg: #FFFFFF;
            --text: #202124;
            --text-secondary: #6B6F76;
            --border: #E5E0D5;
            --warning: #B44B3A;
            --warning-light: #F9EDEB;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 12px rgba(28, 30, 33, 0.06);
            --shadow-md: 0 8px 24px rgba(28, 30, 33, 0.12);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            --font-num: "DIN Alternate", "Roboto", "PingFang SC", sans-serif;
            --max-width: 1180px;
            --section-pad: 72px 24px;
            --transition: 0.25s ease;
        }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.85;
            color: var(--text);
            background: var(--bg);
            min-height: 100vh;
            margin: 0;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent); }
        a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
        button { font-family: inherit; cursor: pointer; border: none; background: none; }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .section { padding: var(--section-pad); }
        .section-alt { background: #FFFFFF; }
        .section-tight { padding: 48px 24px; }
        .section-divider { border-top: 1px solid var(--border); }
        .section-label {
            display: inline-flex; align-items: center; gap: 8px;
            font-size: 13px; font-weight: 600; letter-spacing: 1.5px;
            color: var(--accent); text-transform: uppercase; margin-bottom: 12px;
        }
        .section-label::before { content: ''; width: 20px; height: 2px; background: var(--accent); border-radius: 2px; }
        .section-title { margin-bottom: 16px; }
        .section-desc { color: var(--text-secondary); font-size: 15px; max-width: 720px; margin-bottom: 32px; }

        /* Buttons */
        .btn {
            display: inline-flex; align-items: center; justify-content: center; gap: 8px;
            padding: 13px 28px; border-radius: var(--radius-sm);
            font-size: 15px; font-weight: 600; letter-spacing: 0.3px;
            transition: all var(--transition); min-height: 44px;
            white-space: nowrap; line-height: 1.4; text-decoration: none;
        }
        .btn-primary {
            background: var(--primary); color: #FFFFFF;
            box-shadow: 0 2px 8px rgba(28, 30, 33, 0.18);
        }
        .btn-primary:hover {
            background: #000000; color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn-outline {
            background: transparent; color: var(--primary);
            border: 1.5px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary); color: #FFFFFF;
            transform: translateY(-2px);
        }
        .btn-accent {
            background: var(--accent); color: #FFFFFF;
            box-shadow: 0 2px 10px rgba(200, 135, 58, 0.25);
        }
        .btn-accent:hover {
            background: var(--accent-dark); color: #FFFFFF;
            transform: translateY(-2px);
        }
        .btn-text {
            color: var(--primary); font-weight: 600; padding: 6px 0;
            display: inline-flex; align-items: center; gap: 6px;
            border-bottom: 1.5px solid transparent; transition: all var(--transition);
        }
        .btn-text::after { content: '→'; font-weight: 700; transition: transform var(--transition); }
        .btn-text:hover { color: var(--accent); border-bottom-color: var(--accent); }
        .btn-text:hover::after { transform: translateX(4px); }

        /* Badge & Tag */
        .badge {
            display: inline-flex; align-items: center; gap: 6px;
            padding: 4px 12px; border-radius: 999px;
            font-size: 12px; font-weight: 600; letter-spacing: 0.5px;
            background: #F7EFE6; color: var(--accent-dark);
        }
        .badge-safe {
            background: var(--safe-light); color: var(--safe);
        }
        .badge-gray {
            background: #F0EEE9; color: var(--text-secondary);
        }
        .badge-warning {
            background: var(--warning-light); color: var(--warning);
        }

        /* Header / Navigation */
        .site-header {
            position: sticky; top: 0; z-index: 100;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
        }
        .site-header .container {
            display: flex; align-items: center; justify-content: space-between;
            height: 68px; padding-top: 0; padding-bottom: 0;
        }
        .logo {
            display: flex; align-items: center; gap: 10px;
            font-size: 18px; font-weight: 700; color: var(--primary);
            letter-spacing: -0.3px; flex-shrink: 0;
        }
        .logo-mark {
            width: 34px; height: 34px; border-radius: 8px;
            background: var(--primary); color: var(--accent);
            display: flex; align-items: center; justify-content: center;
            font-size: 14px; font-weight: 800; letter-spacing: 0;
        }
        .main-nav { display: flex; align-items: center; gap: 28px; }
        .main-nav a {
            font-size: 15px; font-weight: 500; color: var(--text-secondary);
            padding: 8px 0; border-bottom: 2px solid transparent;
            transition: all var(--transition); position: relative;
        }
        .main-nav a:hover, .main-nav a.active {
            color: var(--primary); border-bottom-color: var(--accent);
        }
        .main-nav a.active { font-weight: 600; }
        .nav-cta { flex-shrink: 0; }
        .nav-toggle {
            display: none; width: 44px; height: 44px;
            align-items: center; justify-content: center;
            border-radius: var(--radius-sm);
            flex-direction: column; gap: 5px;
            transition: background var(--transition);
        }
        .nav-toggle:hover { background: #F0EEE9; }
        .nav-toggle span {
            display: block; width: 22px; height: 2px;
            background: var(--primary); border-radius: 2px;
            transition: all var(--transition);
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            padding: 20px 0 0;
            background: transparent;
        }
        .breadcrumb {
            display: flex; align-items: center; flex-wrap: wrap; gap: 8px;
            font-size: 14px; color: var(--text-secondary);
            list-style: none; padding: 0; margin: 0;
        }
        .breadcrumb li { display: flex; align-items: center; gap: 8px; }
        .breadcrumb li + li::before {
            content: '/'; color: var(--border); font-size: 14px;
        }
        .breadcrumb a { color: var(--text-secondary); }
        .breadcrumb a:hover { color: var(--accent); }
        .breadcrumb .current { color: var(--primary); font-weight: 500; }

        /* Article Header */
        .article-header-section {
            padding: 32px 24px 40px;
            background: transparent;
        }
        .article-header-grid {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 320px;
            gap: 40px;
            align-items: start;
        }
        .article-meta {
            display: flex; align-items: center; flex-wrap: wrap; gap: 12px;
            margin-bottom: 14px;
        }
        .article-meta .meta-item {
            display: inline-flex; align-items: center; gap: 6px;
            font-size: 13px; color: var(--text-secondary);
        }
        .article-meta .meta-item .dot {
            width: 4px; height: 4px; border-radius: 50%;
            background: var(--border);
        }
        .article-title {
            font-size: 32px; line-height: 1.4; font-weight: 700;
            color: var(--primary); margin: 0 0 16px;
            letter-spacing: -0.5px;
        }
        .article-summary {
            font-size: 16px; color: var(--text-secondary);
            line-height: 1.85; margin: 0 0 20px;
            max-width: 720px;
        }
        .article-cover {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
        }
        .article-cover img {
            width: 100%; height: 240px; object-fit: cover;
        }

        /* Article Body */
        .article-body-section {
            padding: 16px 24px 64px;
            background: transparent;
        }
        .article-body {
            max-width: 68ch;
            margin: 0 auto;
            font-size: 16px;
            line-height: 1.9;
            color: var(--text);
        }
        .article-body h2 {
            font-size: 26px; font-weight: 700; margin: 48px 0 20px;
            color: var(--primary); line-height: 1.4;
        }
        .article-body h3 {
            font-size: 20px; font-weight: 700; margin: 36px 0 16px;
            color: var(--primary); line-height: 1.4;
        }
        .article-body h4 {
            font-size: 17px; font-weight: 700; margin: 28px 0 12px;
            color: var(--primary); line-height: 1.4;
        }
        .article-body p {
            margin: 0 0 20px;
        }
        .article-body ul,
        .article-body ol {
            margin: 0 0 20px; padding-left: 24px;
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .article-body blockquote {
            border-left: 3px solid var(--accent);
            background: #FAF7F2;
            padding: 16px 20px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.85;
        }
        .article-body blockquote p {
            margin: 0;
        }
        .article-body img {
            border-radius: var(--radius);
            margin: 24px 0;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }
        .article-body .article-img-placeholder {
            background: #E8E2D8;
            border-radius: var(--radius);
            padding: 36px 24px;
            text-align: center;
            color: var(--text-secondary);
            font-size: 14px;
            margin: 24px 0;
            border: 1px dashed var(--border);
        }

        /* Related Posts */
        .related-section {
            padding: 48px 24px;
            background: #FFFFFF;
            border-top: 1px solid var(--border);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 24px;
        }
        .related-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            gap: 10px;
            text-decoration: none;
        }
        .related-card:hover {
            transform: translateY(-2px);
            border-color: var(--accent);
            box-shadow: var(--shadow-md);
            color: var(--primary);
        }
        .related-card .card-title {
            font-size: 16px; font-weight: 600; line-height: 1.6;
            color: var(--primary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-meta {
            display: flex; align-items: center; gap: 10px;
            font-size: 13px; color: var(--text-secondary);
        }

        /* Prev Next */
        .prev-next-section {
            padding: 48px 24px;
            background: transparent;
        }
        .prev-next-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .prev-next-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 20px 24px;
            transition: all var(--transition);
            display: block;
            text-decoration: none;
        }
        .prev-next-card:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }
        .prev-next-card .pn-label {
            font-size: 12px; font-weight: 600; letter-spacing: 1px;
            color: var(--text-secondary); text-transform: uppercase;
            margin-bottom: 8px;
        }
        .prev-next-card .pn-title {
            font-size: 15px; font-weight: 600; color: var(--primary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .prev-next-card.next {
            text-align: right;
        }

        /* Latest List */
        .latest-section {
            padding: 48px 24px 64px;
            background: #FFFFFF;
            border-top: 1px solid var(--border);
        }
        .latest-list {
            margin-top: 24px;
            border-top: 1px solid var(--border);
        }
        .latest-list-item {
            display: flex; align-items: center; justify-content: space-between;
            padding: 14px 0;
            border-bottom: 1px solid var(--border);
            gap: 16px;
            text-decoration: none;
            transition: all var(--transition);
        }
        .latest-list-item:hover {
            padding-left: 8px;
            border-bottom-color: var(--accent);
        }
        .latest-list-item .latest-title {
            font-size: 15px; font-weight: 500; color: var(--primary);
            flex: 1; min-width: 0;
            white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
        }
        .latest-list-item .latest-date {
            font-size: 13px; color: var(--text-secondary);
            flex-shrink: 0; font-family: var(--font-num);
        }

        /* Risk Notice */
        .risk-section {
            padding: 32px 24px;
            background: transparent;
            border-top: 1px solid var(--border);
        }
        .risk-content {
            max-width: 820px;
            margin: 0 auto;
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .risk-content strong {
            color: var(--warning);
            font-weight: 600;
        }

        /* Download CTA */
        .download-cta-section {
            padding: 48px 24px;
            background: var(--primary);
        }
        .download-cta-inner {
            display: flex; align-items: center; justify-content: space-between;
            gap: 32px; flex-wrap: wrap;
        }
        .download-cta-inner .cta-title {
            font-size: 24px; font-weight: 700; color: #FFFFFF;
            margin: 0; line-height: 1.5;
        }
        .download-cta-inner .cta-sub {
            font-size: 15px; color: rgba(255, 255, 255, 0.72);
            margin: 8px 0 0;
        }
        .download-cta-inner .btn-accent {
            background: var(--accent);
            color: #FFFFFF;
            font-size: 16px;
            padding: 14px 32px;
        }
        .download-cta-inner .btn-accent:hover {
            background: var(--accent-dark);
            transform: translateY(-2px);
        }

        /* Footer */
        .site-footer {
            background: #16181A;
            color: rgba(255, 255, 255, 0.72);
            padding: 56px 0 0;
        }
        .site-footer .container {
            padding-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-brand h3 {
            color: #FFFFFF; font-size: 18px; font-weight: 700;
            margin: 0 0 14px;
        }
        .footer-brand p {
            font-size: 14px; line-height: 1.8; margin: 0;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 14px; font-weight: 600; color: #FFFFFF;
            margin: 0 0 16px; letter-spacing: 0.5px;
        }
        .footer-col a {
            display: block; font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            padding: 5px 0; transition: color var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            padding: 20px 0;
            text-align: center;
        }
        .footer-bottom p {
            font-size: 13px; color: rgba(255, 255, 255, 0.45);
            margin: 0;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.45);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* Article Empty State */
        .empty-state {
            text-align: center;
            padding: 56px 24px;
            border-radius: var(--radius);
            background: var(--card-bg);
            border: 1px solid var(--border);
            max-width: 640px;
            margin: 0 auto;
        }
        .empty-state h2 {
            font-size: 22px; font-weight: 700; color: var(--primary);
            margin: 0 0 12px;
        }
        .empty-state p {
            font-size: 15px; color: var(--text-secondary);
            margin: 0 0 20px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-header-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .article-cover img {
                height: 220px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 768px) {
            .main-nav {
                position: fixed; top: 68px; left: 0; right: 0;
                background: #FFFFFF; flex-direction: column;
                align-items: stretch; gap: 0;
                padding: 16px 24px; border-bottom: 1px solid var(--border);
                display: none; z-index: 99;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 12px 0; border-bottom: 1px solid var(--border);
                font-size: 16px;
            }
            .main-nav a.active {
                border-bottom-color: var(--accent);
            }
            .nav-toggle { display: flex; }
            .nav-cta { display: none; }
            .section { padding: 48px 20px; }
            .article-title { font-size: 24px; }
            .article-body-section { padding: 16px 20px 48px; }
            .article-body h2 { font-size: 22px; }
            .article-body h3 { font-size: 18px; }
            .related-grid { grid-template-columns: 1fr; }
            .prev-next-grid { grid-template-columns: 1fr; }
            .prev-next-card.next { text-align: left; }
            .latest-list-item { flex-direction: column; align-items: flex-start; gap: 4px; }
            .latest-list-item .latest-title { white-space: normal; }
            .download-cta-inner { flex-direction: column; align-items: flex-start; }
            .download-cta-inner .btn-accent { width: 100%; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
        }
        @media (max-width: 520px) {
            .article-title { font-size: 20px; }
            .article-meta { gap: 8px; flex-wrap: wrap; }
            .article-summary { font-size: 15px; }
            .article-body { font-size: 15px; line-height: 1.9; }
            .article-body h2 { font-size: 20px; }
            .article-body h3 { font-size: 17px; }
            .btn { padding: 12px 20px; font-size: 14px; width: 100%; }
            .section-title { font-size: 20px; }
            .footer-grid { grid-template-columns: 1fr; }
        }

/* roulang page: category1 */
:root {
            --primary: #1C1E21;
            --accent: #C8873A;
            --accent-dark: #A96E2A;
            --safe: #2E6E5E;
            --safe-light: #E8F0ED;
            --bg: #F4F0E8;
            --card-bg: #FFFFFF;
            --text: #202124;
            --text-secondary: #6B6F76;
            --border: #E5E0D5;
            --warning: #B44B3A;
            --warning-light: #F9EDEB;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 12px rgba(28, 30, 33, 0.06);
            --shadow-md: 0 8px 24px rgba(28, 30, 33, 0.12);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            --font-num: "DIN Alternate", "Roboto", "PingFang SC", sans-serif;
            --max-width: 1180px;
            --section-pad: 72px 24px;
            --transition: 0.25s ease;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.85;
            color: var(--text);
            background: var(--bg);
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition), border-color var(--transition), background var(--transition); }
        a:hover { color: var(--accent); }
        a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
        button { font-family: inherit; cursor: pointer; border: none; background: none; }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.4; color: var(--primary); margin-bottom: 0; }
        ul, ol { list-style: none; }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .section { padding: var(--section-pad); }
        .section-alt { background: #FFFFFF; }
        .section-divider { border-top: 1px solid var(--border); }
        .section-label {
            display: inline-flex; align-items: center; gap: 8px;
            font-size: 13px; font-weight: 600; letter-spacing: 1.5px;
            color: var(--accent); text-transform: uppercase; margin-bottom: 12px;
        }
        .section-label::before { content: ''; width: 20px; height: 2px; background: var(--accent); border-radius: 2px; }
        .section-title { margin-bottom: 16px; font-size: 28px; }
        .section-desc { color: var(--text-secondary); font-size: 15px; max-width: 760px; margin-bottom: 32px; }

        .btn {
            display: inline-flex; align-items: center; justify-content: center; gap: 8px;
            padding: 13px 28px; border-radius: var(--radius-sm);
            font-size: 15px; font-weight: 600; letter-spacing: 0.3px;
            transition: all var(--transition); min-height: 44px;
            white-space: nowrap; line-height: 1.4;
        }
        .btn-primary {
            background: var(--primary); color: #FFFFFF;
            box-shadow: 0 2px 8px rgba(28, 30, 33, 0.18);
        }
        .btn-primary:hover {
            background: #000000; color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn-outline {
            background: transparent; color: var(--primary);
            border: 1.5px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary); color: #FFFFFF;
            transform: translateY(-2px);
        }
        .btn-accent {
            background: var(--accent); color: #FFFFFF;
            box-shadow: 0 2px 10px rgba(200, 135, 58, 0.25);
        }
        .btn-accent:hover {
            background: var(--accent-dark); color: #FFFFFF;
            transform: translateY(-2px);
        }
        .btn-sm { padding: 9px 18px; font-size: 14px; min-height: 38px; }
        .btn-text {
            color: var(--primary); font-weight: 600; padding: 6px 0;
            display: inline-flex; align-items: center; gap: 6px;
            border-bottom: 1.5px solid transparent; transition: all var(--transition);
        }
        .btn-text::after { content: '→'; font-weight: 700; transition: transform var(--transition); }
        .btn-text:hover { color: var(--accent); border-bottom-color: var(--accent); }
        .btn-text:hover::after { transform: translateX(4px); }

        .badge {
            display: inline-flex; align-items: center; gap: 6px;
            padding: 4px 12px; border-radius: 999px;
            font-size: 12px; font-weight: 600; letter-spacing: 0.5px;
            background: #F7EFE6; color: var(--accent-dark);
        }
        .badge-safe { background: var(--safe-light); color: var(--safe); }
        .badge-gray { background: #F0EEE9; color: var(--text-secondary); }
        .badge-warning { background: var(--warning-light); color: var(--warning); }

        .site-header {
            position: sticky; top: 0; z-index: 100;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
        }
        .site-header .container {
            display: flex; align-items: center; justify-content: space-between;
            height: 68px; padding-top: 0; padding-bottom: 0;
        }
        .logo {
            display: flex; align-items: center; gap: 10px;
            font-size: 18px; font-weight: 700; color: var(--primary);
            letter-spacing: -0.3px; flex-shrink: 0;
        }
        .logo-mark {
            width: 34px; height: 34px; border-radius: 8px;
            background: var(--primary); color: var(--accent);
            display: flex; align-items: center; justify-content: center;
            font-size: 14px; font-weight: 800; letter-spacing: 0;
        }
        .main-nav { display: flex; align-items: center; gap: 28px; }
        .main-nav a {
            font-size: 15px; font-weight: 500; color: var(--text-secondary);
            padding: 8px 0; border-bottom: 2px solid transparent;
            transition: all var(--transition); position: relative;
        }
        .main-nav a:hover, .main-nav a.active {
            color: var(--primary); border-bottom-color: var(--accent);
        }
        .main-nav a.active { font-weight: 600; }
        .nav-cta { flex-shrink: 0; }
        .nav-toggle {
            display: none; width: 44px; height: 44px;
            align-items: center; justify-content: center;
            border-radius: var(--radius-sm); border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .nav-toggle span {
            display: block; width: 20px; height: 2px;
            background: var(--primary); position: relative;
            transition: all var(--transition);
        }
        .nav-toggle span::before, .nav-toggle span::after {
            content: ''; position: absolute; left: 0; width: 20px; height: 2px;
            background: var(--primary); transition: all var(--transition);
        }
        .nav-toggle span::before { top: -6px; }
        .nav-toggle span::after { top: 6px; }
        .nav-toggle[aria-expanded="true"] span { background: transparent; }
        .nav-toggle[aria-expanded="true"] span::before { top: 0; transform: rotate(45deg); }
        .nav-toggle[aria-expanded="true"] span::after { top: 0; transform: rotate(-45deg); }

        .page-head { padding: 56px 24px 36px; background: var(--bg); }
        .breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--text-secondary); margin-bottom: 16px; flex-wrap: wrap; }
        .breadcrumb a { color: var(--text-secondary); }
        .breadcrumb a:hover { color: var(--accent); }
        .breadcrumb-sep { color: #B8B4AC; }
        .page-head-inner { display: flex; justify-content: space-between; align-items: flex-start; gap: 24px; flex-wrap: wrap; }
        .page-head-title h1 { font-size: 34px; margin-bottom: 12px; }
        .page-head-title p { color: var(--text-secondary); font-size: 16px; max-width: 720px; }
        .page-head-meta { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }

        .steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 24px; }
        .step-card {
            background: var(--card-bg); border: 1px solid var(--border);
            border-radius: var(--radius); padding: 24px 20px;
            box-shadow: var(--shadow-sm); position: relative;
            transition: all var(--transition);
        }
        .step-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--accent); }
        .step-num {
            width: 36px; height: 36px; border-radius: 50%;
            background: var(--primary); color: #FFFFFF;
            display: flex; align-items: center; justify-content: center;
            font-family: var(--font-num); font-weight: 700; font-size: 16px;
            margin-bottom: 14px;
        }
        .step-card h3 { font-size: 17px; margin-bottom: 8px; }
        .step-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 0; }

        .tutorial-list-section { background: #FFFFFF; }
        .tutorial-list { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 24px; }
        .tutorial-card {
            background: var(--card-bg); border: 1px solid var(--border);
            border-radius: var(--radius); padding: 22px 24px;
            box-shadow: var(--shadow-sm); transition: all var(--transition);
        }
        .tutorial-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--accent); }
        .tutorial-card h3 { font-size: 17px; margin-bottom: 10px; line-height: 1.5; }
        .tutorial-card h3 a { color: var(--primary); }
        .tutorial-card h3 a:hover { color: var(--accent); }
        .tutorial-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 14px; }
        .tutorial-meta { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--text-secondary); flex-wrap: wrap; }
        .tutorial-date { font-family: var(--font-num); }
        .empty-state {
            text-align: center; padding: 48px 20px;
            color: var(--text-secondary); font-size: 15px;
            border: 1.5px dashed var(--border); border-radius: var(--radius);
        }
        .list-more { text-align: right; margin-top: 24px; }

        .compat-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 32px; align-items: center; }
        .compat-badges { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 16px; }
        .compat-badge {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 10px 18px; border-radius: 999px;
            background: var(--safe-light); color: var(--safe);
            font-size: 14px; font-weight: 600;
            border: 1px solid #CDE0D8;
        }
        .compat-img { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-md); }
        .compat-img img { width: 100%; height: 100%; object-fit: cover; }

        .security-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 24px; }
        .security-card {
            background: var(--card-bg); border: 1px solid var(--border);
            border-radius: var(--radius); padding: 24px 22px;
            box-shadow: var(--shadow-sm); transition: all var(--transition);
        }
        .security-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--safe); }
        .security-icon {
            width: 40px; height: 40px; border-radius: 10px;
            background: var(--safe-light); color: var(--safe);
            display: flex; align-items: center; justify-content: center;
            font-size: 20px; margin-bottom: 14px; font-weight: 700;
        }
        .security-card h3 { font-size: 16px; margin-bottom: 8px; }
        .security-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 0; }

        .faq-section { background: #FFFFFF; }
        .faq-list { max-width: 760px; margin: 12px auto 0; }
        .faq-item { border-bottom: 1px solid var(--border); }
        .faq-question {
            width: 100%; display: flex; justify-content: space-between; align-items: center;
            padding: 18px 8px; text-align: left; font-size: 16px; font-weight: 600;
            color: var(--primary); transition: color var(--transition);
            gap: 12px; min-height: 44px;
        }
        .faq-question:hover { color: var(--accent); }
        .faq-icon {
            flex-shrink: 0; width: 24px; height: 24px;
            display: flex; align-items: center; justify-content: center;
            font-size: 18px; font-weight: 700; color: var(--accent);
            transition: transform var(--transition);
        }
        .faq-item.open .faq-icon { transform: rotate(45deg); }
        .faq-answer {
            max-height: 0; overflow: hidden;
            transition: max-height 0.35s ease;
            padding: 0 8px;
        }
        .faq-answer-inner { padding-bottom: 18px; color: var(--text-secondary); font-size: 15px; line-height: 1.8; }
        .faq-item.open .faq-answer { max-height: 300px; }

        .cta-section { background: var(--bg); }
        .cta-box {
            background: var(--primary); color: #FFFFFF;
            border-radius: 16px; padding: 48px 40px;
            display: flex; align-items: center; justify-content: space-between;
            gap: 32px; flex-wrap: wrap;
            box-shadow: 0 12px 36px rgba(28, 30, 33, 0.2);
        }
        .cta-box h2 { color: #FFFFFF; font-size: 26px; margin-bottom: 10px; }
        .cta-box p { color: #D6D3CD; font-size: 15px; max-width: 480px; margin-bottom: 0; }
        .cta-actions { display: flex; gap: 14px; flex-wrap: wrap; }

        .site-footer { background: var(--primary); color: #C8C5BF; margin-top: 0; }
        .site-footer .container { padding-top: 56px; padding-bottom: 24px; }
        .footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 32px; }
        .footer-brand h3 { color: #FFFFFF; font-size: 20px; margin-bottom: 12px; }
        .footer-brand p { font-size: 14px; line-height: 1.8; color: #A8A5A0; }
        .footer-col h4 { color: #FFFFFF; font-size: 15px; margin-bottom: 14px; }
        .footer-col a { display: block; color: #A8A5A0; font-size: 14px; padding: 5px 0; transition: color var(--transition); }
        .footer-col a:hover { color: var(--accent); }
        .footer-bottom { border-top: 1px solid #2E2F33; padding: 20px 0; text-align: center; }
        .footer-bottom p { font-size: 13px; color: #7A7975; margin-bottom: 0; }
        .footer-bottom a { color: #A8A5A0; }
        .footer-bottom a:hover { color: var(--accent); }

        @media (max-width: 1024px) {
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .compat-grid { grid-template-columns: 1fr; }
            .security-cards { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .nav-toggle { display: flex; }
            .main-nav {
                position: absolute; top: 68px; left: 0; right: 0;
                background: #FFFFFF; flex-direction: column; gap: 0;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-md);
                display: none; padding: 12px 24px;
            }
            .main-nav.open { display: flex; }
            .main-nav a { width: 100%; padding: 14px 0; border-bottom: 1px solid var(--border); }
            .main-nav a:last-child { border-bottom: none; }
            .nav-cta { display: none; }
            .page-head-title h1 { font-size: 26px; }
            .tutorial-list { grid-template-columns: 1fr; }
            .section { padding: 48px 16px; }
            .section-alt { padding: 48px 16px; }
            .section-title { font-size: 23px; }
            .cta-box { padding: 32px 24px; flex-direction: column; text-align: center; }
            .cta-actions { justify-content: center; }
        }
        @media (max-width: 520px) {
            .steps-grid { grid-template-columns: 1fr; }
            .security-cards { grid-template-columns: 1fr; }
            .tutorial-card { padding: 18px 16px; }
            .page-head { padding: 40px 16px 28px; }
            .page-head-title h1 { font-size: 22px; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .btn { width: 100%; }
            .compat-badge { font-size: 12px; padding: 8px 14px; }
            .cta-actions .btn { width: auto; }
        }

/* roulang page: category3 */
:root {
            --primary: #1C1E21;
            --accent: #C8873A;
            --accent-dark: #A96E2A;
            --safe: #2E6E5E;
            --safe-light: #E8F0ED;
            --bg: #F4F0E8;
            --card-bg: #FFFFFF;
            --text: #202124;
            --text-secondary: #6B6F76;
            --border: #E5E0D5;
            --warning: #B44B3A;
            --warning-light: #F9EDEB;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 12px rgba(28, 30, 33, 0.06);
            --shadow-md: 0 8px 24px rgba(28, 30, 33, 0.12);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            --font-num: "DIN Alternate", "Roboto", "PingFang SC", sans-serif;
            --max-width: 1180px;
            --section-pad: 72px 24px;
            --transition: 0.25s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.85;
            color: var(--text);
            background: var(--bg);
            min-height: 100vh;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius);
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        a:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 2px;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: var(--section-pad);
        }
        .section-alt {
            background: #FFFFFF;
        }
        .section-tight {
            padding: 48px 24px;
        }
        .section-divider {
            border-top: 1px solid var(--border);
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1.5px;
            color: var(--accent);
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .section-label::before {
            content: '';
            width: 20px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .section-title {
            margin-bottom: 16px;
            font-size: 28px;
            line-height: 1.35;
            font-weight: 700;
            color: var(--primary);
        }
        .section-desc {
            color: var(--text-secondary);
            font-size: 15px;
            max-width: 720px;
            margin-bottom: 32px;
        }
        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            letter-spacing: 0.3px;
            transition: all var(--transition);
            min-height: 44px;
            white-space: nowrap;
            line-height: 1.4;
        }
        .btn-primary {
            background: var(--primary);
            color: #FFFFFF;
            box-shadow: 0 2px 8px rgba(28, 30, 33, 0.18);
        }
        .btn-primary:hover {
            background: #000000;
            color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 1.5px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #FFFFFF;
            transform: translateY(-2px);
        }
        .btn-accent {
            background: var(--accent);
            color: #FFFFFF;
            box-shadow: 0 2px 10px rgba(200, 135, 58, 0.25);
        }
        .btn-accent:hover {
            background: var(--accent-dark);
            color: #FFFFFF;
            transform: translateY(-2px);
        }
        .btn-text {
            color: var(--primary);
            font-weight: 600;
            padding: 6px 0;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            border-bottom: 1.5px solid transparent;
            transition: all var(--transition);
        }
        .btn-text::after {
            content: '→';
            font-weight: 700;
            transition: transform var(--transition);
        }
        .btn-text:hover {
            color: var(--accent);
            border-bottom-color: var(--accent);
        }
        .btn-text:hover::after {
            transform: translateX(4px);
        }
        /* Badge & Tag */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.5px;
            background: #F7EFE6;
            color: var(--accent-dark);
        }
        .badge-safe {
            background: var(--safe-light);
            color: var(--safe);
        }
        .badge-gray {
            background: #F0EEE9;
            color: var(--text-secondary);
        }
        .badge-warning {
            background: var(--warning-light);
            color: var(--warning);
        }
        /* Header / Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            padding-top: 0;
            padding-bottom: 0;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.3px;
            flex-shrink: 0;
        }
        .logo-mark {
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: var(--primary);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 800;
            letter-spacing: 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 28px;
        }
        .main-nav a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 8px 0;
            border-bottom: 2px solid transparent;
            transition: all var(--transition);
            position: relative;
        }
        .main-nav a:hover,
        .main-nav a.active {
            color: var(--primary);
            border-bottom-color: var(--accent);
        }
        .main-nav a.active {
            font-weight: 600;
        }
        .nav-cta {
            flex-shrink: 0;
        }
        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            background: #fff;
        }
        .nav-toggle span {
            display: block;
            width: 18px;
            height: 2px;
            background: var(--primary);
            position: relative;
            transition: all var(--transition);
        }
        .nav-toggle span::before,
        .nav-toggle span::after {
            content: '';
            position: absolute;
            left: 0;
            width: 18px;
            height: 2px;
            background: var(--primary);
            transition: all var(--transition);
        }
        .nav-toggle span::before { top: -5px; }
        .nav-toggle span::after { top: 5px; }
        /* Breadcrumb & Category Hero */
        .category-hero {
            background: var(--card-bg);
            border-bottom: 1px solid var(--border);
            padding: 40px 24px;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 16px;
        }
        .breadcrumb a {
            color: var(--text-secondary);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb .sep {
            color: var(--border);
        }
        .breadcrumb .current {
            color: var(--primary);
            font-weight: 500;
        }
        .category-hero h1 {
            font-size: 36px;
            line-height: 1.3;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .category-hero .lead {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 720px;
        }
        /* Safety Badges */
        .safety-badges {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            margin-top: 24px;
        }
        .safety-badge-item {
            background: var(--safe-light);
            border: 1px solid #D5E4DE;
            border-radius: var(--radius);
            padding: 20px 16px;
            text-align: center;
            transition: all var(--transition);
        }
        .safety-badge-item:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }
        .safety-badge-item .icon {
            font-size: 28px;
            font-weight: 700;
            color: var(--safe);
            margin-bottom: 8px;
        }
        .safety-badge-item h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 4px;
        }
        .safety-badge-item p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        /* Article List */
        .article-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .article-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .article-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--accent);
        }
        .article-card .card-image {
            aspect-ratio: 16/9;
            background: #E9E5DE;
            overflow: hidden;
        }
        .article-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
        }
        .article-card .card-body {
            padding: 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .article-card .card-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
        }
        .article-card .card-meta .badge {
            margin-right: auto;
        }
        .article-card .card-meta .date {
            font-size: 12px;
            color: var(--text-secondary);
        }
        .article-card h3 {
            font-size: 16px;
            line-height: 1.5;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .article-card h3 a {
            color: var(--primary);
        }
        .article-card h3 a:hover {
            color: var(--accent);
        }
        .article-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .list-more {
            text-align: center;
            margin-top: 32px;
        }
        /* Split Section */
        .split-section {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .split-section.reverse {
            direction: rtl;
        }
        .split-section.reverse > * {
            direction: ltr;
        }
        .split-text h2 {
            font-size: 24px;
            line-height: 1.4;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .split-text p {
            color: var(--text-secondary);
            font-size: 15px;
            margin-bottom: 16px;
        }
        .split-text ul {
            list-style: none;
            padding: 0;
        }
        .split-text ul li {
            padding-left: 24px;
            position: relative;
            margin-bottom: 10px;
            font-size: 15px;
            color: var(--text);
        }
        .split-text ul li::before {
            content: '✓';
            position: absolute;
            left: 0;
            top: 0;
            color: var(--safe);
            font-weight: 700;
        }
        .split-image {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }
        .split-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        /* Privacy Cards */
        .privacy-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .privacy-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px;
            transition: all var(--transition);
        }
        .privacy-card:hover {
            box-shadow: var(--shadow-sm);
        }
        .privacy-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--primary);
        }
        .privacy-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        /* Risk Warning */
        .risk-card {
            background: var(--warning-light);
            border-left: 4px solid var(--warning);
            border-radius: var(--radius-sm);
            padding: 24px;
            margin-top: 24px;
        }
        .risk-card h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--warning);
            margin-bottom: 8px;
        }
        .risk-card ul {
            list-style: none;
            padding: 0;
        }
        .risk-card ul li {
            font-size: 14px;
            color: var(--text);
            padding-left: 20px;
            position: relative;
            margin-bottom: 6px;
        }
        .risk-card ul li::before {
            content: '!';
            position: absolute;
            left: 0;
            top: 0;
            color: var(--warning);
            font-weight: 700;
        }
        /* CTA Bar */
        .cta-bar {
            background: var(--primary);
            border-radius: var(--radius);
            padding: 48px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            color: #FFFFFF;
        }
        .cta-bar h2 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 8px;
            color: #FFFFFF;
        }
        .cta-bar p {
            font-size: 15px;
            color: rgba(255,255,255,0.8);
            margin: 0;
        }
        .cta-bar .btn-group {
            display: flex;
            gap: 16px;
            flex-shrink: 0;
        }
        /* Footer */
        .site-footer {
            background: var(--primary);
            color: #FFFFFF;
            padding: 48px 24px 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
        }
        .footer-brand h3 {
            font-size: 18px;
            margin-bottom: 12px;
            color: #FFFFFF;
        }
        .footer-brand p {
            font-size: 14px;
            color: rgba(255,255,255,0.7);
            line-height: 1.7;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 16px;
            color: #FFFFFF;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255,255,255,0.7);
            margin-bottom: 10px;
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.12);
            padding: 20px 0;
            text-align: center;
        }
        .footer-bottom p {
            font-size: 13px;
            color: rgba(255,255,255,0.5);
            margin: 0;
        }
        .footer-bottom a {
            color: rgba(255,255,255,0.7);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .article-list {
                grid-template-columns: repeat(2, 1fr);
            }
            .safety-badges {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .section {
                padding: 48px 16px;
            }
            .category-hero h1 {
                font-size: 24px;
            }
            .split-section {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .article-list {
                grid-template-columns: 1fr;
            }
            .privacy-grid {
                grid-template-columns: 1fr;
            }
            .cta-bar {
                flex-direction: column;
                text-align: center;
                padding: 32px 24px;
            }
            .cta-bar .btn-group {
                width: 100%;
                flex-direction: column;
            }
            .cta-bar .btn {
                width: 100%;
            }
            .nav-toggle {
                display: flex;
            }
            .main-nav {
                position: fixed;
                top: 68px;
                left: 0;
                right: 0;
                background: #FFFFFF;
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 16px 24px;
                border-bottom: 1px solid var(--border);
                display: none;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                padding: 12px 0;
                border-bottom: 1px solid var(--border);
            }
            .main-nav a:last-child {
                border-bottom: none;
            }
            .nav-cta {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .safety-badges {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .breadcrumb {
                font-size: 13px;
                flex-wrap: wrap;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #1C1E21;
            --accent: #C8873A;
            --accent-dark: #A96E2A;
            --safe: #2E6E5E;
            --safe-light: #E8F0ED;
            --bg: #F4F0E8;
            --card-bg: #FFFFFF;
            --text: #202124;
            --text-secondary: #6B6F76;
            --border: #E5E0D5;
            --warning: #B44B3A;
            --warning-light: #F9EDEB;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow-sm: 0 2px 12px rgba(28, 30, 33, 0.06);
            --shadow-md: 0 8px 24px rgba(28, 30, 33, 0.12);
            --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            --font-num: "DIN Alternate", "Roboto", "PingFang SC", sans-serif;
            --max-width: 1180px;
            --section-pad: 72px 24px;
            --transition: 0.25s ease;
        }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        *, *::before, *::after { box-sizing: border-box; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.85;
            color: var(--text);
            background: var(--bg);
            min-height: 100vh;
            margin: 0;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent); }
        a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
        button { font-family: inherit; cursor: pointer; border: none; background: none; }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .section { padding: var(--section-pad); }
        .section-alt { background: #FFFFFF; }
        .section-tight { padding: 48px 24px; }
        .section-divider { border-top: 1px solid var(--border); }
        .section-label {
            display: inline-flex; align-items: center; gap: 8px;
            font-size: 13px; font-weight: 600; letter-spacing: 1.5px;
            color: var(--accent); text-transform: uppercase; margin-bottom: 12px;
        }
        .section-label::before { content: ''; width: 20px; height: 2px; background: var(--accent); border-radius: 2px; }
        .section-title { margin-bottom: 16px; font-size: 28px; font-weight: 700; line-height: 1.4; }
        .section-desc { color: var(--text-secondary); font-size: 15px; max-width: 720px; margin-bottom: 32px; }

        /* Buttons */
        .btn {
            display: inline-flex; align-items: center; justify-content: center; gap: 8px;
            padding: 13px 28px; border-radius: var(--radius-sm);
            font-size: 15px; font-weight: 600; letter-spacing: 0.3px;
            transition: all var(--transition); min-height: 44px;
            white-space: nowrap; line-height: 1.4;
        }
        .btn-primary {
            background: var(--primary); color: #FFFFFF;
            box-shadow: 0 2px 8px rgba(28, 30, 33, 0.18);
        }
        .btn-primary:hover {
            background: #000000; color: #FFFFFF;
            transform: translateY(-2px); box-shadow: var(--shadow-md);
        }
        .btn-outline {
            background: transparent; color: var(--primary);
            border: 1.5px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary); color: #FFFFFF; transform: translateY(-2px);
        }
        .btn-accent {
            background: var(--accent); color: #FFFFFF;
            box-shadow: 0 2px 10px rgba(200, 135, 58, 0.25);
        }
        .btn-accent:hover {
            background: var(--accent-dark); color: #FFFFFF; transform: translateY(-2px);
        }
        .btn-text {
            color: var(--primary); font-weight: 600; padding: 6px 0;
            display: inline-flex; align-items: center; gap: 6px;
            border-bottom: 1.5px solid transparent; transition: all var(--transition);
        }
        .btn-text::after { content: '→'; font-weight: 700; transition: transform var(--transition); }
        .btn-text:hover { color: var(--accent); border-bottom-color: var(--accent); }
        .btn-text:hover::after { transform: translateX(4px); }

        /* Badge & Tag */
        .badge {
            display: inline-flex; align-items: center; gap: 6px;
            padding: 4px 12px; border-radius: 999px;
            font-size: 12px; font-weight: 600; letter-spacing: 0.5px;
            background: #F7EFE6; color: var(--accent-dark);
        }
        .badge-safe { background: var(--safe-light); color: var(--safe); }
        .badge-gray { background: #F0EEE9; color: var(--text-secondary); }
        .badge-warning { background: var(--warning-light); color: var(--warning); }

        /* Header / Navigation */
        .site-header {
            position: sticky; top: 0; z-index: 100;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
        }
        .site-header .container {
            display: flex; align-items: center; justify-content: space-between;
            height: 68px; padding-top: 0; padding-bottom: 0;
        }
        .logo {
            display: flex; align-items: center; gap: 10px;
            font-size: 18px; font-weight: 700; color: var(--primary);
            letter-spacing: -0.3px; flex-shrink: 0;
        }
        .logo-mark {
            width: 34px; height: 34px; border-radius: 8px;
            background: var(--primary); color: var(--accent);
            display: flex; align-items: center; justify-content: center;
            font-size: 14px; font-weight: 800; letter-spacing: 0;
        }
        .main-nav { display: flex; align-items: center; gap: 28px; }
        .main-nav a {
            font-size: 15px; font-weight: 500; color: var(--text-secondary);
            padding: 8px 0; border-bottom: 2px solid transparent;
            transition: all var(--transition); position: relative;
        }
        .main-nav a:hover, .main-nav a.active {
            color: var(--primary); border-bottom-color: var(--accent);
        }
        .main-nav a.active { font-weight: 600; }
        .nav-cta { flex-shrink: 0; }
        .nav-toggle {
            display: none; width: 44px; height: 44px;
            align-items: center; justify-content: center;
            border-radius: var(--radius-sm);
        }
        .nav-toggle span {
            display: block; width: 24px; height: 2px;
            background: var(--primary); position: relative;
            transition: background var(--transition);
        }
        .nav-toggle span::before,
        .nav-toggle span::after {
            content: ''; position: absolute; left: 0; width: 24px; height: 2px;
            background: var(--primary); transition: transform var(--transition);
        }
        .nav-toggle span::before { top: -7px; }
        .nav-toggle span::after { top: 7px; }

        /* Breadcrumb */
        .breadcrumb-area {
            background: var(--card-bg);
            padding: 40px 24px;
            border-bottom: 1px solid var(--border);
        }
        .breadcrumb {
            display: flex; align-items: center; gap: 8px;
            font-size: 14px; color: var(--text-secondary);
            margin-bottom: 12px; flex-wrap: wrap;
        }
        .breadcrumb a { color: var(--text-secondary); transition: color var(--transition); }
        .breadcrumb a:hover { color: var(--accent); }
        .breadcrumb .sep { color: var(--border); }
        .breadcrumb .current { color: var(--primary); font-weight: 600; }
        .page-header-title {
            font-size: 34px; font-weight: 700; margin: 0 0 12px;
            line-height: 1.35; letter-spacing: -0.5px;
        }
        .page-header-desc {
            color: var(--text-secondary); font-size: 15px;
            max-width: 680px; margin: 0;
        }
        .page-header-meta {
            display: flex; align-items: center; gap: 16px;
            margin-top: 16px; font-size: 13px; color: var(--text-secondary);
            flex-wrap: wrap;
        }
        .page-header-meta .version-tag {
            font-family: var(--font-num);
            background: #F0EEE9; padding: 4px 10px; border-radius: 999px;
            color: var(--text-secondary); font-weight: 600;
        }

        /* Filter Tags */
        .tool-filter-bar {
            display: flex; gap: 12px; flex-wrap: wrap; margin: 32px 0;
        }
        .tool-filter-btn {
            padding: 9px 22px; border-radius: 24px;
            border: 1px solid var(--border); background: var(--card-bg);
            color: var(--text-secondary); font-size: 14px; font-weight: 500;
            transition: all var(--transition); min-height: 40px;
        }
        .tool-filter-btn:hover, .tool-filter-btn.active {
            border-color: var(--accent); color: var(--accent-dark);
            background: #F7EFE6; font-weight: 600;
        }

        /* Article List Cards */
        .article-list-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .article-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .article-card:hover {
            transform: translateY(-2px);
            border-color: var(--accent);
            box-shadow: var(--shadow-md);
        }
        .article-card .card-thumb {
            aspect-ratio: 16 / 9;
            background: #F0EEE9;
            overflow: hidden;
            position: relative;
        }
        .article-card .card-thumb img {
            width: 100%; height: 100%; object-fit: cover;
            transition: transform var(--transition);
        }
        .article-card:hover .card-thumb img { transform: scale(1.03); }
        .article-card .card-body {
            padding: 20px 22px 22px;
        }
        .article-card .card-meta {
            display: flex; align-items: center; gap: 10px;
            margin-bottom: 10px; flex-wrap: wrap;
        }
        .article-card .card-meta time {
            font-size: 12px; color: var(--text-secondary);
            font-family: var(--font-num);
        }
        .article-card h3 {
            font-size: 17px; font-weight: 700; margin: 0 0 8px;
            line-height: 1.5; display: -webkit-box;
            -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
        }
        .article-card h3 a { color: var(--primary); }
        .article-card h3 a:hover { color: var(--accent); }
        .article-card .card-excerpt {
            color: var(--text-secondary); font-size: 14px;
            line-height: 1.7; margin: 0 0 14px;
            display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
        }
        .article-card .card-read {
            font-size: 13px; font-weight: 600; color: var(--accent-dark);
            display: inline-flex; align-items: center; gap: 4px;
        }
        .article-card .card-read::after { content: '→'; transition: transform var(--transition); }
        .article-card:hover .card-read::after { transform: translateX(4px); }

        /* Tool Advantages */
        .advantage-row {
            display: grid; grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .advantage-item {
            background: var(--card-bg);
            padding: 28px 24px;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            text-align: center;
            transition: all var(--transition);
        }
        .advantage-item:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-sm);
        }
        .advantage-icon {
            width: 48px; height: 48px; border-radius: 10px;
            background: var(--safe-light); color: var(--safe);
            display: flex; align-items: center; justify-content: center;
            font-size: 22px; font-weight: 700; margin: 0 auto 14px;
        }
        .advantage-item h3 {
            font-size: 17px; font-weight: 700; margin: 0 0 8px;
        }
        .advantage-item p {
            color: var(--text-secondary); font-size: 14px;
            margin: 0; line-height: 1.7;
        }

        /* Diagram Showcase */
        .diagram-showcase {
            display: grid; grid-template-columns: 1fr 1fr;
            gap: 32px; align-items: center;
        }
        .diagram-content h3 {
            font-size: 22px; font-weight: 700; margin: 0 0 14px;
        }
        .diagram-content p {
            color: var(--text-secondary); font-size: 14px;
            margin: 0 0 18px; line-height: 1.8;
        }
        .diagram-visual {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            aspect-ratio: 16 / 10;
        }
        .diagram-visual img {
            width: 100%; height: 100%; object-fit: cover;
        }

        /* Risk Card */
        .risk-knowledge-card {
            background: #FFFFFF;
            border-radius: var(--radius);
            border: 1px solid var(--warning-light);
            padding: 36px;
            box-shadow: var(--shadow-sm);
            display: grid;
            grid-template-columns: 1fr auto;
            gap: 32px;
            align-items: center;
        }
        .risk-knowledge-card h3 {
            font-size: 20px; font-weight: 700; margin: 0 0 10px;
        }
        .risk-knowledge-card p {
            color: var(--text-secondary); font-size: 14px;
            margin: 0; line-height: 1.8;
        }
        .risk-knowledge-card .risk-actions {
            display: flex; gap: 12px; flex-wrap: wrap;
            justify-content: flex-end;
        }

        /* CTA Section */
        .cta-section {
            background: var(--primary);
            padding: 56px 24px;
            text-align: center;
        }
        .cta-section h2 {
            color: #FFFFFF; font-size: 28px; font-weight: 700;
            margin: 0 0 14px; letter-spacing: -0.5px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.75); font-size: 15px;
            margin: 0 0 28px;
        }
        .cta-section .cta-actions {
            display: flex; gap: 14px; justify-content: center; flex-wrap: wrap;
        }

        /* Empty State */
        .empty-state {
            padding: 48px 24px; text-align: center;
            background: var(--card-bg); border-radius: var(--radius);
            border: 1px dashed var(--border);
            color: var(--text-secondary); font-size: 15px;
        }

        /* Footer */
        .site-footer {
            background: var(--primary); color: rgba(255, 255, 255, 0.75);
            padding: 56px 24px 0;
        }
        .site-footer .footer-grid {
            display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 40px; padding-bottom: 40px;
        }
        .site-footer h3 {
            color: #FFFFFF; font-size: 18px; font-weight: 700;
            margin: 0 0 14px;
        }
        .site-footer p {
            font-size: 13px; line-height: 1.8; margin: 0;
            color: rgba(255, 255, 255, 0.65);
        }
        .site-footer h4 {
            color: #FFFFFF; font-size: 14px; font-weight: 600;
            margin: 0 0 14px;
        }
        .site-footer .footer-col a {
            display: block; color: rgba(255, 255, 255, 0.65);
            font-size: 13px; padding: 5px 0;
            transition: color var(--transition);
        }
        .site-footer .footer-col a:hover {
            color: var(--accent);
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding: 18px 24px; text-align: center;
            font-size: 12px; color: rgba(255, 255, 255, 0.45);
        }
        .site-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
        }
        .site-footer .footer-bottom a:hover {
            color: var(--accent);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-list-grid { grid-template-columns: repeat(2, 1fr); }
            .advantage-row { grid-template-columns: repeat(3, 1fr); gap: 16px; }
            .site-footer .footer-grid { grid-template-columns: 1fr 1fr; }
            .risk-knowledge-card { grid-template-columns: 1fr; }
            .risk-knowledge-card .risk-actions { justify-content: flex-start; }
        }
        @media (max-width: 768px) {
            .nav-toggle { display: flex; }
            .main-nav {
                display: none; position: fixed; top: 68px; left: 0; right: 0;
                background: #FFFFFF; flex-direction: column;
                padding: 20px 24px; gap: 12px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-md);
                z-index: 99;
            }
            .main-nav.open { display: flex; }
            .main-nav a {
                padding: 10px 0; border-bottom: 1px solid var(--border);
                font-size: 16px;
            }
            .nav-cta { display: none; }
            .section { padding: 48px 20px; }
            .section-title { font-size: 24px; }
            .page-header-title { font-size: 26px; }
            .diagram-showcase { grid-template-columns: 1fr; }
            .advantage-row { grid-template-columns: 1fr; }
            .article-list-grid { grid-template-columns: 1fr; }
            .cta-section h2 { font-size: 24px; }
        }
        @media (max-width: 520px) {
            .site-header .container { height: 60px; }
            .logo { font-size: 16px; }
            .logo-mark { width: 30px; height: 30px; font-size: 12px; }
            .main-nav { top: 60px; }
            .breadcrumb-area { padding: 28px 16px; }
            .page-header-title { font-size: 22px; }
            .tool-filter-btn { font-size: 13px; padding: 7px 16px; min-height: 38px; }
            .risk-knowledge-card { padding: 24px 20px; }
            .site-footer .footer-grid { grid-template-columns: 1fr; gap: 24px; }
        }