/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #1E3A5F;
            --primary-light: #2D5A8E;
            --primary-dark: #0F2440;
            --secondary: #F59E0B;
            --secondary-light: #FBBF24;
            --accent: #3B82F6;
            --accent-light: #60A5FA;
            --dark: #0F172A;
            --text: #1E293B;
            --text-light: #64748B;
            --text-muted: #94A3B8;
            --bg: #FFFFFF;
            --bg-alt: #F1F5F9;
            --bg-dark: #0F172A;
            --border: #E2E8F0;
            --border-light: #F1F5F9;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow: 0 4px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
            --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --nav-height: 72px;
            --container-max: 1200px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-light); }
        a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        button { cursor: pointer; border: none; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--dark); font-weight: 700; }

        /* ===== Container ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 640px) {
            .container { padding: 0 16px; }
        }

        /* ===== Typography ===== */
        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent);
            background: rgba(59,130,246,0.08);
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--dark);
            line-height: 1.25;
            margin-bottom: 16px;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-light);
            max-width: 640px;
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .section-title { font-size: 1.6rem; }
            .section-subtitle { font-size: 1rem; }
        }
        @media (max-width: 520px) {
            .section-title { font-size: 1.35rem; }
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: var(--radius);
            transition: all var(--transition);
            border: 2px solid transparent;
            line-height: 1.4;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-light);
            border-color: var(--primary-light);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(30,58,95,0.3);
        }
        .btn-primary:active { transform: translateY(0); box-shadow: none; }
        .btn-secondary {
            background: var(--secondary);
            color: #fff;
            border-color: var(--secondary);
        }
        .btn-secondary:hover {
            background: var(--secondary-light);
            border-color: var(--secondary-light);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(245,158,11,0.3);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(30,58,95,0.2);
        }
        .btn-lg { padding: 16px 36px; font-size: 1.05rem; border-radius: var(--radius-lg); }
        .btn-sm { padding: 8px 18px; font-size: 0.85rem; border-radius: var(--radius-sm); }
        .btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

        /* ===== Header & Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 30px rgba(0,0,0,0.06);
            background: rgba(255,255,255,0.98);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .nav-logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .nav-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--primary);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            font-weight: 700;
        }
        .nav-logo:hover { color: var(--primary); opacity: 0.85; }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links a {
            padding: 8px 18px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
        }
        .nav-links a:hover {
            color: var(--primary);
            background: rgba(30,58,95,0.05);
        }
        .nav-links a.active {
            color: var(--primary);
            font-weight: 600;
            background: rgba(30,58,95,0.08);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg-alt);
            border-radius: 24px;
            padding: 0 16px;
            height: 40px;
            border: 1px solid var(--border);
            transition: all var(--transition);
            min-width: 180px;
        }
        .nav-search:focus-within {
            border-color: var(--accent);
            box-shadow: 0 0 0 3px rgba(59,130,246,0.12);
            background: #fff;
        }
        .nav-search i { color: var(--text-muted); font-size: 0.9rem; }
        .nav-search input {
            border: none;
            background: transparent;
            padding: 0 10px;
            height: 100%;
            font-size: 0.85rem;
            color: var(--text);
            width: 100%;
            outline: none;
        }
        .nav-search input::placeholder { color: var(--text-muted); }
        .nav-cta .btn { padding: 8px 22px; font-size: 0.85rem; border-radius: 24px; }

        /* Mobile menu */
        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            background: var(--bg-alt);
            font-size: 1.2rem;
            color: var(--text);
            cursor: pointer;
            transition: background var(--transition);
        }
        .nav-toggle:hover { background: var(--border); }

        @media (max-width: 900px) {
            .nav-links { display: none; }
            .nav-search { display: none; }
            .nav-toggle { display: flex; }
            .nav-right .nav-cta .btn { padding: 8px 16px; font-size: 0.8rem; }
            .mobile-menu-open .nav-links {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(20px);
                padding: 16px 24px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
            }
            .mobile-menu-open .nav-links a { padding: 12px 16px; font-size: 1rem; width: 100%; }
            .mobile-menu-open .nav-links a.active::after { display: none; }
            .mobile-menu-open .nav-search {
                display: flex;
                margin: 12px 0 8px;
                width: 100%;
            }
        }
        @media (max-width: 520px) {
            .nav-logo { font-size: 1.1rem; }
            .nav-logo .logo-icon { width: 30px; height: 30px; font-size: 0.9rem; }
            .nav-right .nav-cta .btn { display: none; }
        }

        /* ===== Hero ===== */
        .hero {
            padding: 140px 0 80px;
            min-height: 90vh;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            background: var(--bg-dark);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            mix-blend-mode: overlay;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,36,64,0.92) 0%, rgba(30,58,95,0.7) 50%, rgba(15,36,64,0.88) 100%);
        }
        .hero .container { position: relative; z-index: 2; width: 100%; }
        .hero-content { max-width: 720px; }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(245,158,11,0.15);
            color: var(--secondary);
            font-size: 0.85rem;
            font-weight: 600;
            padding: 6px 18px;
            border-radius: 24px;
            margin-bottom: 24px;
            border: 1px solid rgba(245,158,11,0.2);
        }
        .hero-badge i { font-size: 0.75rem; }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 900;
            color: #fff;
            line-height: 1.15;
            letter-spacing: -0.02em;
            margin-bottom: 20px;
        }
        .hero-title .highlight { color: var(--secondary); }
        .hero-desc {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.75);
            line-height: 1.8;
            max-width: 580px;
            margin-bottom: 36px;
        }
        .hero-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .hero-actions .btn { border-radius: 50px; }
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid rgba(255,255,255,0.1);
        }
        .hero-stat-item { text-align: left; }
        .hero-stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }
        .hero-stat-number .suffix { color: var(--secondary); font-size: 1rem; }
        .hero-stat-label {
            font-size: 0.85rem;
            color: rgba(255,255,255,0.55);
            margin-top: 2px;
        }

        @media (max-width: 1024px) {
            .hero-title { font-size: 2.8rem; }
            .hero { padding: 120px 0 60px; min-height: auto; }
        }
        @media (max-width: 768px) {
            .hero-title { font-size: 2.2rem; }
            .hero-desc { font-size: 1rem; }
            .hero-stats { gap: 24px; flex-wrap: wrap; }
            .hero-stat-number { font-size: 1.6rem; }
        }
        @media (max-width: 520px) {
            .hero-title { font-size: 1.8rem; }
            .hero { padding: 100px 0 50px; }
            .hero-actions .btn { width: 100%; justify-content: center; }
            .hero-stats { flex-direction: column; gap: 16px; }
        }

        /* ===== Section spacing ===== */
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-alt); }
        .section-dark { background: var(--bg-dark); color: #fff; }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header .section-subtitle { margin: 0 auto; }

        @media (max-width: 768px) { .section { padding: 50px 0; } .section-header { margin-bottom: 32px; } }

        /* ===== Features ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 36px 28px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--border);
        }
        .feature-icon {
            width: 60px;
            height: 60px;
            border-radius: 16px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 1.5rem;
            color: #fff;
        }
        .feature-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--dark);
        }
        .feature-card p {
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        @media (max-width: 900px) { .features-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 560px) { .features-grid { grid-template-columns: 1fr; } }

        /* ===== Categories ===== */
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            min-height: 300px;
            display: flex;
            align-items: flex-end;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            background: var(--bg-dark);
        }
        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-xl);
        }
        .category-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.6s ease;
        }
        .category-card:hover img { transform: scale(1.05); }
        .category-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15,36,64,0.9) 0%, rgba(15,36,64,0.2) 60%, transparent 100%);
        }
        .category-info {
            position: relative;
            z-index: 2;
            padding: 32px 28px;
            width: 100%;
        }
        .category-info h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }
        .category-info p {
            color: rgba(255,255,255,0.7);
            font-size: 0.95rem;
            margin-bottom: 16px;
        }
        .category-info .btn {
            background: rgba(255,255,255,0.12);
            color: #fff;
            border: 1px solid rgba(255,255,255,0.2);
            padding: 8px 20px;
            border-radius: 24px;
            font-size: 0.85rem;
        }
        .category-info .btn:hover {
            background: var(--secondary);
            border-color: var(--secondary);
            color: #fff;
        }

        @media (max-width: 700px) { .categories-grid { grid-template-columns: 1fr; } .category-card { min-height: 240px; } }

        /* ===== Latest Posts (CMS) ===== */
        .posts-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .post-card {
            background: var(--bg);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .post-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: var(--border);
        }
        .post-card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: var(--bg-alt);
        }
        .post-card-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .post-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 10px;
        }
        .post-card-meta .category-tag {
            background: rgba(30,58,95,0.08);
            color: var(--primary);
            padding: 2px 12px;
            border-radius: 12px;
            font-weight: 500;
            font-size: 0.75rem;
        }
        .post-card h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--dark);
            line-height: 1.4;
            margin-bottom: 8px;
            flex: 1;
        }
        .post-card h3 a { color: inherit; }
        .post-card h3 a:hover { color: var(--primary); }
        .post-card .excerpt {
            font-size: 0.88rem;
            color: var(--text-light);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-card .read-more {
            margin-top: 14px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .post-card .read-more:hover { gap: 8px; }
        .posts-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 40px 20px;
            color: var(--text-light);
            font-size: 1rem;
            background: var(--bg);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
        }

        @media (max-width: 900px) { .posts-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 560px) { .posts-grid { grid-template-columns: 1fr; } }

        /* ===== Process / Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            counter-reset: step;
        }
        .step-card {
            text-align: center;
            padding: 36px 24px;
            background: var(--bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
        }
        .step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .step-number {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 1.3rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            position: relative;
        }
        .step-number::after {
            content: '';
            position: absolute;
            inset: -4px;
            border-radius: 50%;
            border: 2px dashed rgba(30,58,95,0.15);
        }
        .step-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 8px;
        }
        .step-card p {
            color: var(--text-light);
            font-size: 0.92rem;
            line-height: 1.7;
        }

        @media (max-width: 800px) { .steps-grid { grid-template-columns: 1fr; gap: 20px; } .step-card { padding: 28px 20px; } }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            text-align: center;
            padding: 32px 16px;
            background: rgba(255,255,255,0.05);
            border-radius: var(--radius);
            border: 1px solid rgba(255,255,255,0.08);
            transition: all var(--transition);
        }
        .stat-card:hover { background: rgba(255,255,255,0.08); transform: translateY(-2px); }
        .stat-card .number {
            font-size: 2.4rem;
            font-weight: 900;
            color: var(--secondary);
            line-height: 1.2;
        }
        .stat-card .label {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.65);
            margin-top: 6px;
        }

        @media (max-width: 800px) { .stats-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 480px) { .stats-grid { grid-template-columns: 1fr; } .stat-card .number { font-size: 2rem; } }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg);
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover { border-color: var(--border); box-shadow: var(--shadow-sm); }
        .faq-question {
            width: 100%;
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-weight: 600;
            font-size: 1rem;
            color: var(--dark);
            text-align: left;
            background: none;
            transition: background var(--transition);
            gap: 16px;
        }
        .faq-question:hover { background: rgba(30,58,95,0.02); }
        .faq-question i { color: var(--accent); font-size: 0.85rem; transition: transform var(--transition); flex-shrink: 0; }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 60px 0;
        }
        .cta-inner h2 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-inner p {
            font-size: 1.1rem;
            color: rgba(255,255,255,0.7);
            max-width: 520px;
            margin: 0 auto 32px;
        }
        .cta-inner .btn {
            background: var(--secondary);
            color: #fff;
            border-color: var(--secondary);
            padding: 16px 40px;
            font-size: 1.05rem;
            border-radius: 50px;
        }
        .cta-inner .btn:hover {
            background: var(--secondary-light);
            border-color: var(--secondary-light);
            transform: translateY(-2px);
            box-shadow: 0 12px 40px rgba(245,158,11,0.35);
        }

        @media (max-width: 768px) { .cta-inner h2 { font-size: 1.8rem; } .cta-inner p { font-size: 1rem; } }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.6);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
            margin-bottom: 30px;
        }
        .footer-brand .nav-logo { color: #fff; margin-bottom: 12px; }
        .footer-brand .nav-logo .logo-icon { background: var(--secondary); color: var(--dark); }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255,255,255,0.5);
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }
        .footer-col ul { display: flex; flex-direction: column; gap: 8px; }
        .footer-col ul a {
            color: rgba(255,255,255,0.5);
            font-size: 0.88rem;
            transition: all var(--transition);
        }
        .footer-col ul a:hover { color: var(--secondary); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: rgba(255,255,255,0.35);
        }
        .footer-bottom a { color: rgba(255,255,255,0.35); }
        .footer-bottom a:hover { color: var(--secondary); }

        @media (max-width: 900px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; } .footer-brand { grid-column: 1 / -1; } }
        @media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } .footer-bottom { flex-direction: column; text-align: center; } }

        /* ===== Helper classes ===== */
        .text-center { text-align: center; }
        .mt-8 { margin-top: 8px; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }
        .mt-32 { margin-top: 32px; }
        .mb-16 { margin-bottom: 16px; }
        .gap-8 { gap: 8px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

        /* ===== Accessibility ===== */
        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
        }
        .skip-link {
            position: absolute;
            top: -100%;
            left: 16px;
            background: var(--primary);
            color: #fff;
            padding: 8px 16px;
            border-radius: 0 0 8px 8px;
            z-index: 10000;
            font-weight: 600;
        }
        .skip-link:focus { top: 0; }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar { width: 8px; }
        ::-webkit-scrollbar-track { background: var(--bg-alt); }
        ::-webkit-scrollbar-thumb { background: var(--text-muted); border-radius: 4px; }
        ::-webkit-scrollbar-thumb:hover { background: var(--text-light); }

        /* ===== Mobile nav fix ===== */
        .mobile-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.3);
            z-index: 999;
        }
        .mobile-overlay.active { display: block; }

        @media (max-width: 900px) {
            .mobile-menu-open .mobile-overlay { display: block; }
        }

/* roulang page: category1 */
:root {
            --primary: #e63946;
            --primary-dark: #b71c1c;
            --primary-light: #ff6b6b;
            --secondary: #1d3557;
            --secondary-light: #457b9d;
            --accent: #f4a261;
            --bg-dark: #0f1a2e;
            --bg-card: #ffffff;
            --bg-light: #f8f9fa;
            --bg-section-alt: #eef3f8;
            --text: #1a1a2e;
            --text-light: #6c757d;
            --text-white: #f1faee;
            --border: #dee2e6;
            --border-light: #e9ecef;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.14);
            --shadow-dark: 0 8px 30px rgba(0, 0, 0, 0.25);
            --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --container-w: 1200px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }

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

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

        .container {
            max-width: var(--container-w);
            margin: 0 auto;
            padding: 0 20px;
        }

        .text-center {
            text-align: center;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--secondary);
            margin-bottom: 0.5rem;
            letter-spacing: -0.02em;
            line-height: 1.25;
        }
        .section-sub {
            font-size: 1.1rem;
            color: var(--text-light);
            max-width: 640px;
            margin: 0 auto 2.5rem auto;
        }
        .section-header {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-header .section-title::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 0.75rem auto 0;
        }

        .badge {
            display: inline-block;
            padding: 0.25rem 0.85rem;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--primary);
            color: #fff;
            letter-spacing: 0.02em;
        }
        .badge-secondary {
            background: var(--secondary);
        }
        .badge-accent {
            background: var(--accent);
            color: #1a1a2e;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(230, 57, 70, 0.35);
        }
        .btn:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(230, 57, 70, 0.4);
        }
        .btn:active {
            transform: translateY(0);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
            box-shadow: none;
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(230, 57, 70, 0.3);
        }
        .btn-secondary {
            background: var(--secondary);
            box-shadow: 0 4px 14px rgba(29, 53, 87, 0.35);
        }
        .btn-secondary:hover {
            background: #14253d;
            box-shadow: 0 8px 24px rgba(29, 53, 87, 0.4);
        }
        .btn-sm {
            padding: 0.5rem 1.25rem;
            font-size: 0.9rem;
        }
        .btn-lg {
            padding: 1rem 2.5rem;
            font-size: 1.1rem;
        }

        /* ===== 导航 ===== */
        .site-header {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: background var(--transition);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--secondary);
            text-decoration: none;
        }
        .nav-logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 1.3rem;
            font-weight: 800;
        }
        .nav-logo:hover {
            color: var(--secondary);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            list-style: none;
        }
        .nav-links a {
            padding: 0.5rem 1.1rem;
            border-radius: 50px;
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text);
            transition: all var(--transition);
            text-decoration: none;
            position: relative;
        }
        .nav-links a:hover {
            background: rgba(230, 57, 70, 0.08);
            color: var(--primary);
        }
        .nav-links a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(230, 57, 70, 0.3);
        }
        .nav-links a.active:hover {
            background: var(--primary-dark);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg-light);
            border: 1px solid var(--border-light);
            border-radius: 50px;
            padding: 0.4rem 0.4rem 0.4rem 1rem;
            transition: all var(--transition);
        }
        .nav-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.15);
        }
        .nav-search input {
            border: none;
            background: transparent;
            padding: 0.3rem 0.5rem;
            font-size: 0.9rem;
            color: var(--text);
            outline: none;
            min-width: 160px;
        }
        .nav-search input::placeholder {
            color: var(--text-light);
        }
        .nav-search button {
            background: var(--primary);
            border: none;
            color: #fff;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            cursor: pointer;
            transition: background var(--transition);
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .nav-search button:hover {
            background: var(--primary-dark);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text);
            cursor: pointer;
            padding: 0.25rem;
        }

        /* ===== 横幅Banner ===== */
        .page-banner {
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1a2a4a 100%);
            padding: 5rem 0 4rem;
            position: relative;
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.25;
            mix-blend-mode: overlay;
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-banner h1 {
            font-size: 3rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 1rem;
            letter-spacing: -0.02em;
            line-height: 1.2;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
        }
        .page-banner p {
            font-size: 1.2rem;
            color: rgba(241, 250, 238, 0.85);
            max-width: 700px;
            margin: 0 auto 1.5rem;
            line-height: 1.6;
        }
        .page-banner .badge {
            background: var(--accent);
            color: #1a1a2e;
            margin-bottom: 1rem;
        }
        .breadcrumb {
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            font-size: 0.9rem;
            color: rgba(241, 250, 238, 0.7);
            margin-bottom: 1.5rem;
        }
        .breadcrumb a {
            color: rgba(241, 250, 238, 0.8);
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .breadcrumb span {
            color: var(--accent);
        }

        /* ===== 板块通用 ===== */
        section {
            padding: 4.5rem 0;
        }
        .section-alt {
            background: var(--bg-section-alt);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-dark .section-title {
            color: #fff;
        }
        .section-dark .section-sub {
            color: rgba(241, 250, 238, 0.75);
        }

        /* ===== 卡片 ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: all var(--transition);
            border: 1px solid var(--border-light);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            display: block;
        }
        .card-body {
            padding: 1.5rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-body .badge {
            align-self: flex-start;
            margin-bottom: 0.75rem;
        }
        .card-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 0.5rem;
            line-height: 1.4;
        }
        .card-body p {
            font-size: 0.95rem;
            color: var(--text-light);
            margin-bottom: 1rem;
            flex: 1;
        }
        .card-body .btn {
            align-self: flex-start;
        }

        .card-horizontal {
            flex-direction: row;
        }
        .card-horizontal .card-img {
            width: 240px;
            min-height: 100%;
            aspect-ratio: auto;
            flex-shrink: 0;
        }
        .card-horizontal .card-body {
            padding: 1.5rem 1.75rem;
        }

        /* ===== 指南步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 2rem 1.5rem;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
            counter-increment: step;
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .step-card::before {
            content: counter(step);
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1rem;
            box-shadow: 0 4px 10px rgba(230, 57, 70, 0.3);
        }
        .step-card .step-icon {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 1rem;
            margin-top: 0.5rem;
        }
        .step-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--secondary);
            margin-bottom: 0.5rem;
        }
        .step-card p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.5;
        }

        /* ===== 内容列表 ===== */
        .content-list {
            display: grid;
            gap: 1rem;
        }
        .content-item {
            display: flex;
            align-items: flex-start;
            gap: 1.25rem;
            background: var(--bg-card);
            padding: 1.25rem 1.5rem;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            cursor: default;
        }
        .content-item:hover {
            transform: translateX(4px);
            box-shadow: var(--shadow-hover);
        }
        .content-item .item-index {
            flex-shrink: 0;
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
        }
        .content-item .item-body h4 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--secondary);
            margin-bottom: 0.25rem;
        }
        .content-item .item-body p {
            font-size: 0.92rem;
            color: var(--text-light);
            margin: 0;
        }
        .content-item .item-tag {
            flex-shrink: 0;
            align-self: center;
            margin-left: auto;
        }

        /* ===== FAQ ===== */
        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
            display: grid;
            gap: 0.75rem;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item summary {
            padding: 1.25rem 1.5rem;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--secondary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: background var(--transition);
            list-style: none;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 0.85rem;
            color: var(--primary);
            transition: transform var(--transition);
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-item summary:hover {
            background: rgba(230, 57, 70, 0.04);
        }
        .faq-item .faq-answer {
            padding: 0 1.5rem 1.25rem 1.5rem;
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.7;
            border-top: 1px solid var(--border-light);
            padding-top: 1rem;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: #fff;
            text-align: center;
            padding: 4.5rem 0;
        }
        .cta-section h2 {
            font-size: 2.4rem;
            font-weight: 800;
            margin-bottom: 0.75rem;
            letter-spacing: -0.02em;
        }
        .cta-section p {
            font-size: 1.15rem;
            opacity: 0.9;
            max-width: 600px;
            margin: 0 auto 2rem;
        }
        .cta-section .btn {
            background: #fff;
            color: var(--primary);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
        }
        .cta-section .btn:hover {
            background: var(--bg-light);
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
        }
        .cta-section .btn-outline-white {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.6);
            box-shadow: none;
        }
        .cta-section .btn-outline-white:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: #fff;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(241, 250, 238, 0.8);
            padding: 3.5rem 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .nav-logo {
            color: #fff;
            margin-bottom: 0.75rem;
            font-size: 1.4rem;
        }
        .footer-brand p {
            font-size: 0.92rem;
            line-height: 1.7;
            color: rgba(241, 250, 238, 0.7);
            max-width: 360px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 1rem;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .footer-col ul a {
            color: rgba(241, 250, 238, 0.7);
            font-size: 0.9rem;
            transition: color var(--transition);
        }
        .footer-col ul a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.5rem 0;
            font-size: 0.85rem;
            color: rgba(241, 250, 238, 0.5);
            flex-wrap: wrap;
            gap: 0.75rem;
        }
        .footer-bottom a {
            color: var(--accent);
        }
        .footer-bottom a:hover {
            color: #fff;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .card-horizontal {
                flex-direction: column;
            }
            .card-horizontal .card-img {
                width: 100%;
                aspect-ratio: 16/9;
            }
        }

        @media (max-width: 768px) {
            .site-header .container {
                height: 64px;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 1rem 1.5rem 1.5rem;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow);
                gap: 0.25rem;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                padding: 0.7rem 1rem;
                width: 100%;
                text-align: center;
            }
            .nav-search {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }

            .page-banner h1 {
                font-size: 2rem;
            }
            .page-banner p {
                font-size: 1rem;
            }
            .page-banner {
                padding: 3rem 0 2.5rem;
                min-height: 240px;
            }

            section {
                padding: 3rem 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .section-sub {
                font-size: 1rem;
            }

            .steps-grid {
                grid-template-columns: 1fr;
                gap: 1.25rem;
            }

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

            .cta-section h2 {
                font-size: 1.8rem;
            }
            .cta-section p {
                font-size: 1rem;
            }

            .content-item {
                flex-direction: column;
                gap: 0.75rem;
                padding: 1rem 1.25rem;
            }
            .content-item .item-tag {
                align-self: flex-start;
                margin-left: 0;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .page-banner h1 {
                font-size: 1.6rem;
            }
            .page-banner p {
                font-size: 0.92rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .btn-lg {
                padding: 0.8rem 1.8rem;
                font-size: 1rem;
            }
            .card-body {
                padding: 1.25rem;
            }
            .faq-item summary {
                padding: 1rem 1.25rem;
                font-size: 0.95rem;
            }
            .faq-item .faq-answer {
                padding: 0 1.25rem 1rem 1.25rem;
                font-size: 0.9rem;
            }
        }

        @media (min-width: 769px) {
            .mobile-toggle {
                display: none !important;
            }
            .nav-links {
                display: flex !important;
                position: static !important;
                background: transparent !important;
                box-shadow: none !important;
                padding: 0 !important;
                flex-direction: row !important;
                border: none !important;
            }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --clr-primary: #0b0e1a;
            --clr-primary-light: #151e2f;
            --clr-accent: #e8491d;
            --clr-accent-hover: #ff5a00;
            --clr-accent-glow: rgba(232, 73, 29, 0.25);
            --clr-gold: #ff8c00;
            --clr-bg: #0f111a;
            --clr-surface: #141a28;
            --clr-card: #1a2235;
            --clr-card-hover: #1f2a42;
            --clr-text: #e8eaf0;
            --clr-text-weak: #8899aa;
            --clr-border: #2a3550;
            --clr-border-light: #3a4a6a;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
            --shadow-md: 0 6px 24px rgba(0,0,0,0.4);
            --shadow-lg: 0 12px 48px rgba(0,0,0,0.5);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
            --nav-height: 72px;
            --max-width: 1200px;
        }

        /* ===== 基础 Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--clr-text);
            background: var(--clr-bg);
            min-height: 100vh;
        }
        a { color: var(--clr-accent); text-decoration: none; transition: color var(--transition); }
        a:hover, a:focus { color: var(--clr-accent-hover); }
        a:focus-visible { outline: 2px solid var(--clr-accent); outline-offset: 2px; border-radius: var(--radius-sm); }
        img { max-width: 100%; height: auto; display: block; }
        ul, ol { list-style: none; padding: 0; margin: 0; }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        button { cursor: pointer; border: none; background: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: #fff; letter-spacing: -0.01em; }
        h1 { font-size: 2.4rem; }
        h2 { font-size: 1.8rem; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 1rem; }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .section-pad { padding: 80px 0; }
        .section-title { text-align: center; margin-bottom: 48px; position: relative; }
        .section-title h2 { display: inline-block; position: relative; padding-bottom: 12px; }
        .section-title h2::after {
            content: '';
            position: absolute; bottom: 0; left: 50%; transform: translateX(-50%);
            width: 60px; height: 3px; background: var(--clr-accent); border-radius: 2px;
        }
        .section-title p { color: var(--clr-text-weak); margin-top: 8px; font-size: 1.05rem; max-width: 600px; margin-left: auto; margin-right: auto; }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky; top: 0; z-index: 100;
            background: rgba(11, 14, 26, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--clr-border);
            height: var(--nav-height);
            display: flex; align-items: center;
        }
        .site-header .container {
            display: flex; align-items: center; justify-content: space-between;
            width: 100%; gap: 20px;
        }
        .nav-logo {
            display: flex; align-items: center; gap: 8px;
            font-size: 1.4rem; font-weight: 800; color: #fff !important;
            letter-spacing: -0.02em; white-space: nowrap;
        }
        .nav-logo .logo-icon {
            display: inline-flex; align-items: center; justify-content: center;
            width: 36px; height: 36px; background: var(--clr-accent);
            color: #fff; border-radius: var(--radius-sm); font-size: 1.2rem;
            font-weight: 900; box-shadow: 0 2px 12px var(--clr-accent-glow);
        }
        .nav-links { display: flex; align-items: center; gap: 8px; }
        .nav-links a {
            padding: 8px 18px; border-radius: var(--radius-sm);
            font-size: 0.9rem; font-weight: 500; color: var(--clr-text-weak);
            transition: all var(--transition); position: relative;
            white-space: nowrap;
        }
        .nav-links a:hover { color: #fff; background: var(--clr-surface); }
        .nav-links a.active { color: #fff; background: var(--clr-accent); box-shadow: 0 2px 16px var(--clr-accent-glow); }
        .nav-actions { display: flex; align-items: center; gap: 12px; }
        .nav-search {
            display: flex; align-items: center; gap: 8px;
            background: var(--clr-surface); border: 1px solid var(--clr-border);
            border-radius: 24px; padding: 6px 16px; transition: all var(--transition);
        }
        .nav-search:focus-within { border-color: var(--clr-accent); box-shadow: 0 0 0 3px var(--clr-accent-glow); }
        .nav-search input {
            background: none; border: none; outline: none; color: var(--clr-text);
            width: 120px; font-size: 0.85rem; padding: 4px 0;
        }
        .nav-search input::placeholder { color: var(--clr-text-weak); }
        .nav-search i { color: var(--clr-text-weak); font-size: 0.85rem; }
        .nav-cta {
            padding: 8px 22px; background: var(--clr-accent); color: #fff !important;
            border-radius: 24px; font-weight: 600; font-size: 0.85rem;
            transition: all var(--transition); box-shadow: 0 2px 12px var(--clr-accent-glow);
            white-space: nowrap;
        }
        .nav-cta:hover { background: var(--clr-accent-hover); transform: translateY(-1px); box-shadow: 0 4px 24px var(--clr-accent-glow); }
        .nav-toggle { display: none; color: #fff; font-size: 1.4rem; padding: 8px; }

        /* ===== 文章页 Hero ===== */
        .article-hero {
            padding: 60px 0 40px;
            background: linear-gradient(135deg, var(--clr-primary) 0%, #0d1525 100%);
            border-bottom: 1px solid var(--clr-border);
            position: relative;
        }
        .article-hero::before {
            content: '';
            position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.06; pointer-events: none;
        }
        .article-breadcrumb {
            display: flex; flex-wrap: wrap; align-items: center; gap: 6px 12px;
            font-size: 0.85rem; color: var(--clr-text-weak); margin-bottom: 24px;
        }
        .article-breadcrumb a { color: var(--clr-text-weak); }
        .article-breadcrumb a:hover { color: var(--clr-accent); }
        .article-breadcrumb .sep { color: var(--clr-border-light); }
        .article-breadcrumb .current { color: var(--clr-text); }
        .article-hero .article-category {
            display: inline-block; padding: 4px 14px; background: var(--clr-accent);
            color: #fff; border-radius: 20px; font-size: 0.75rem; font-weight: 600;
            letter-spacing: 0.5px; margin-bottom: 16px; text-transform: uppercase;
        }
        .article-hero h1 {
            font-size: 2.4rem; font-weight: 800; line-height: 1.2;
            max-width: 900px; margin-bottom: 16px;
        }
        .article-meta {
            display: flex; flex-wrap: wrap; gap: 16px 28px;
            color: var(--clr-text-weak); font-size: 0.85rem; margin-top: 8px;
        }
        .article-meta i { margin-right: 6px; color: var(--clr-accent); }
        .article-meta span { display: flex; align-items: center; }

        /* ===== 文章正文 ===== */
        .article-main { padding: 48px 0 64px; }
        .article-body {
            max-width: 820px; margin: 0 auto;
            background: var(--clr-surface); border-radius: var(--radius-lg);
            padding: 48px; border: 1px solid var(--clr-border);
            box-shadow: var(--shadow-md);
        }
        .article-cover {
            border-radius: var(--radius-md); overflow: hidden; margin-bottom: 36px;
            border: 1px solid var(--clr-border);
        }
        .article-cover img { width: 100%; display: block; }
        .article-content {
            font-size: 1.05rem; line-height: 1.85; color: var(--clr-text);
        }
        .article-content p { margin-bottom: 1.4rem; }
        .article-content h2, .article-content h3 { margin-top: 2rem; margin-bottom: 1rem; color: #fff; }
        .article-content img { border-radius: var(--radius-md); margin: 24px 0; border: 1px solid var(--clr-border); }
        .article-content ul, .article-content ol { padding-left: 24px; margin-bottom: 1.4rem; }
        .article-content ul { list-style: disc; }
        .article-content ol { list-style: decimal; }
        .article-content li { margin-bottom: 6px; }
        .article-content blockquote {
            border-left: 4px solid var(--clr-accent); background: rgba(232, 73, 29, 0.08);
            padding: 16px 24px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 24px 0; color: var(--clr-text-weak);
        }
        .article-content a { color: var(--clr-gold); text-decoration: underline; }
        .article-content a:hover { color: var(--clr-accent); }

        /* ===== 文章信息条 ===== */
        .article-footer-bar {
            max-width: 820px; margin: 32px auto 0;
            display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
            gap: 16px; padding: 20px 0; border-top: 1px solid var(--clr-border);
        }
        .article-tags { display: flex; flex-wrap: wrap; gap: 8px; }
        .article-tags .tag {
            padding: 4px 14px; background: var(--clr-card); color: var(--clr-text-weak);
            border-radius: 20px; font-size: 0.8rem; border: 1px solid var(--clr-border);
            transition: all var(--transition);
        }
        .article-tags .tag:hover { background: var(--clr-accent); color: #fff; border-color: var(--clr-accent); }
        .article-share { display: flex; align-items: center; gap: 10px; color: var(--clr-text-weak); font-size: 0.85rem; }
        .article-share a {
            display: inline-flex; align-items: center; justify-content: center;
            width: 36px; height: 36px; border-radius: 50%; background: var(--clr-card);
            color: var(--clr-text-weak); border: 1px solid var(--clr-border);
            transition: all var(--transition); font-size: 0.9rem;
        }
        .article-share a:hover { background: var(--clr-accent); color: #fff; border-color: var(--clr-accent); transform: translateY(-2px); }

        /* ===== 推荐文章 ===== */
        .related-section { background: var(--clr-primary); }
        .related-grid {
            display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
        }
        .related-card {
            background: var(--clr-card); border-radius: var(--radius-md);
            border: 1px solid var(--clr-border); overflow: hidden;
            transition: all var(--transition);
        }
        .related-card:hover { transform: translateY(-4px); border-color: var(--clr-accent); box-shadow: var(--shadow-md); }
        .related-card .card-img {
            height: 180px; background: var(--clr-surface); position: relative; overflow: hidden;
        }
        .related-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
        .related-card:hover .card-img img { transform: scale(1.05); }
        .related-card .card-body { padding: 20px; }
        .related-card .card-body h4 { font-size: 1rem; margin-bottom: 8px; color: #fff; }
        .related-card .card-body h4 a { color: #fff; }
        .related-card .card-body h4 a:hover { color: var(--clr-accent); }
        .related-card .card-body p { font-size: 0.85rem; color: var(--clr-text-weak); margin-bottom: 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .related-card .card-meta {
            display: flex; justify-content: space-between; align-items: center;
            padding: 12px 20px; border-top: 1px solid var(--clr-border);
            font-size: 0.75rem; color: var(--clr-text-weak);
        }
        .related-card .card-meta .cat { color: var(--clr-accent); font-weight: 600; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--clr-primary) 0%, #1a0f0a 100%);
            border-top: 1px solid var(--clr-border); border-bottom: 1px solid var(--clr-border);
            text-align: center;
        }
        .cta-section h2 { font-size: 2rem; margin-bottom: 12px; }
        .cta-section p { color: var(--clr-text-weak); max-width: 600px; margin: 0 auto 28px; font-size: 1.05rem; }
        .cta-buttons { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
        .btn-primary, .btn-secondary {
            padding: 14px 36px; border-radius: 30px; font-weight: 700; font-size: 0.95rem;
            transition: all var(--transition); display: inline-flex; align-items: center; gap: 8px;
        }
        .btn-primary { background: var(--clr-accent); color: #fff !important; box-shadow: 0 4px 20px var(--clr-accent-glow); }
        .btn-primary:hover { background: var(--clr-accent-hover); transform: translateY(-2px); box-shadow: 0 8px 32px var(--clr-accent-glow); }
        .btn-secondary { background: transparent; color: #fff !important; border: 1px solid var(--clr-border); }
        .btn-secondary:hover { background: var(--clr-surface); border-color: var(--clr-accent); transform: translateY(-2px); }

        /* ===== 底部导航 ===== */
        .bottom-nav {
            background: var(--clr-surface); padding: 32px 0;
            border-top: 1px solid var(--clr-border);
        }
        .bottom-nav .container {
            display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 12px 24px;
        }
        .bottom-nav a {
            padding: 8px 20px; border-radius: var(--radius-sm);
            color: var(--clr-text-weak); font-size: 0.9rem; transition: all var(--transition);
        }
        .bottom-nav a:hover { color: #fff; background: var(--clr-card); }
        .bottom-nav .back-home { color: var(--clr-accent); font-weight: 600; }
        .bottom-nav .back-home:hover { background: var(--clr-accent); color: #fff; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--clr-primary);
            border-top: 1px solid var(--clr-border);
            padding: 56px 0 32px;
        }
        .footer-grid {
            display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .nav-logo { margin-bottom: 12px; }
        .footer-brand p { font-size: 0.85rem; color: var(--clr-text-weak); max-width: 320px; line-height: 1.7; }
        .footer-col h4 { font-size: 0.95rem; margin-bottom: 16px; color: #fff; font-weight: 600; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { color: var(--clr-text-weak); font-size: 0.85rem; transition: color var(--transition); }
        .footer-col ul li a:hover { color: var(--clr-accent); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid var(--clr-border); padding-top: 20px;
            display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center;
            font-size: 0.8rem; color: var(--clr-text-weak); gap: 12px;
        }
        .footer-bottom a { color: var(--clr-text-weak); }
        .footer-bottom a:hover { color: var(--clr-accent); }

        /* ===== 内容未找到 ===== */
        .not-found-section {
            min-height: 50vh; display: flex; align-items: center; justify-content: center;
            text-align: center; padding: 80px 24px;
        }
        .not-found-section .icon { font-size: 4rem; color: var(--clr-accent); margin-bottom: 24px; opacity: 0.7; }
        .not-found-section h2 { font-size: 2rem; margin-bottom: 12px; }
        .not-found-section p { color: var(--clr-text-weak); margin-bottom: 24px; max-width: 480px; }
        .not-found-section .btn-primary { display: inline-flex; }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .related-grid { grid-template-columns: repeat(2, 1fr); }
            .article-hero h1 { font-size: 2rem; }
        }
        @media (max-width: 768px) {
            .nav-links { display: none; }
            .nav-actions .nav-search { display: none; }
            .nav-actions .nav-cta { display: none; }
            .nav-toggle { display: block; }
            .nav-links.open {
                display: flex; flex-direction: column; position: absolute; top: var(--nav-height); left: 0; right: 0;
                background: rgba(11, 14, 26, 0.98); backdrop-filter: blur(16px); padding: 20px 24px;
                border-bottom: 1px solid var(--clr-border); gap: 4px;
            }
            .nav-links.open a { padding: 12px 16px; width: 100%; }
            .section-pad { padding: 48px 0; }
            .article-body { padding: 24px; }
            .article-hero h1 { font-size: 1.6rem; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-section h2 { font-size: 1.5rem; }
            .article-meta { flex-direction: column; gap: 8px; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-hero { padding: 32px 0 24px; }
            .article-hero h1 { font-size: 1.3rem; }
            .article-body { padding: 16px; border-radius: var(--radius-md); }
            .article-content { font-size: 0.95rem; }
            .article-footer-bar { flex-direction: column; align-items: flex-start; }
            .bottom-nav .container { flex-direction: column; }
            .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
            .section-title h2 { font-size: 1.3rem; }
        }

/* roulang page: category2 */
/* ===== Design Variables ===== */
        :root {
            --primary: #c9302c;
            --primary-dark: #a42824;
            --primary-light: #e85d5a;
            --secondary: #f0b400;
            --secondary-light: #ffd54f;
            --accent: #2b2b2b;
            --bg-dark: #1a1a1a;
            --bg-darker: #0f0f0f;
            --bg-card: #ffffff;
            --bg-soft: #f8f5f0;
            --bg-section: #f5f2ed;
            --text-primary: #1a1a1a;
            --text-secondary: #4a4a4a;
            --text-light: #8a8a8a;
            --text-white: #ffffff;
            --text-muted: #b0b0b0;
            --border-light: #e8e3dd;
            --border-focus: #c9302c;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.14);
            --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.07);
            --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1200px;
            --nav-height: 72px;
        }

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

        html { scroll-behavior: smooth; }

        body {
            font-family: var(--font-sans);
            background: var(--bg-soft);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        a:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; border-radius: var(--radius-sm); }

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

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

        ul, ol { list-style: none; }

        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--text-primary); }

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

        @media (max-width: 768px) {
            .container { padding: 0 16px; }
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            background: var(--bg-darker);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            position: sticky;
            top: 0;
            z-index: 100;
            height: var(--nav-height);
            display: flex;
            align-items: center;
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }

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

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.5px;
        }
        .nav-logo:hover { color: var(--secondary); }
        .nav-logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 1.2rem;
            font-weight: 800;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.75);
            font-size: 0.95rem;
            font-weight: 500;
            transition: var(--transition);
            position: relative;
        }
        .nav-links a:hover {
            color: var(--text-white);
            background: rgba(255, 255, 255, 0.08);
        }
        .nav-links a.active {
            color: var(--text-white);
            background: var(--primary);
            font-weight: 600;
            box-shadow: 0 2px 12px rgba(201, 48, 44, 0.35);
        }
        .nav-links a.active::after {
            display: none;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .nav-search {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.10);
            border-radius: 100px;
            padding: 6px 16px 6px 18px;
            transition: var(--transition);
            min-width: 200px;
        }
        .nav-search:focus-within {
            border-color: var(--primary-light);
            background: rgba(255, 255, 255, 0.12);
            box-shadow: 0 0 0 3px rgba(201, 48, 44, 0.15);
        }
        .nav-search input {
            background: transparent;
            border: none;
            outline: none;
            color: var(--text-white);
            padding: 6px 0;
            font-size: 0.9rem;
            width: 100%;
        }
        .nav-search input::placeholder { color: rgba(255, 255, 255, 0.4); }
        .nav-search i {
            color: rgba(255, 255, 255, 0.4);
            font-size: 0.9rem;
            margin-left: 8px;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--secondary);
            color: var(--bg-darker);
            padding: 10px 24px;
            border-radius: 100px;
            font-weight: 700;
            font-size: 0.9rem;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-cta:hover {
            background: var(--secondary-light);
            color: var(--bg-darker);
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(240, 180, 0, 0.35);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1.6rem;
            padding: 4px 8px;
            cursor: pointer;
            border-radius: var(--radius-sm);
        }
        .mobile-toggle:hover { background: rgba(255, 255, 255, 0.08); }

        @media (max-width: 900px) {
            .nav-links { display: none; }
            .nav-search { display: none; }
            .mobile-toggle { display: block; }
            .nav-actions .nav-cta { display: none; }
            .site-header .container { justify-content: space-between; }
        }

        /* ===== Mobile Drawer ===== */
        .mobile-drawer {
            display: none;
            position: fixed;
            top: var(--nav-height);
            left: 0;
            width: 100%;
            height: calc(100vh - var(--nav-height));
            background: var(--bg-darker);
            z-index: 99;
            padding: 24px 16px 40px;
            overflow-y: auto;
            flex-direction: column;
            gap: 12px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .mobile-drawer.open { display: flex; }
        .mobile-drawer a {
            display: block;
            padding: 14px 20px;
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.1rem;
            font-weight: 500;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.03);
            transition: var(--transition);
        }
        .mobile-drawer a:hover { background: rgba(255, 255, 255, 0.08); color: var(--text-white); }
        .mobile-drawer a.active { background: var(--primary); color: #fff; }
        .mobile-drawer .drawer-search {
            display: flex;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.10);
            border-radius: 100px;
            padding: 10px 18px;
            align-items: center;
            margin-bottom: 8px;
        }
        .mobile-drawer .drawer-search input {
            background: transparent;
            border: none;
            outline: none;
            color: #fff;
            width: 100%;
            font-size: 1rem;
        }
        .mobile-drawer .drawer-search input::placeholder { color: rgba(255, 255, 255, 0.4); }
        .mobile-drawer .drawer-search i { color: rgba(255, 255, 255, 0.4); margin-left: 8px; }
        .mobile-drawer .drawer-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--secondary);
            color: var(--bg-darker);
            padding: 14px 24px;
            border-radius: 100px;
            font-weight: 700;
            font-size: 1rem;
            margin-top: 8px;
            text-align: center;
        }

        /* ===== Hero / Banner ===== */
        .page-hero {
            position: relative;
            padding: 100px 0 80px;
            background: var(--bg-darker);
            overflow: hidden;
            min-height: 380px;
            display: flex;
            align-items: center;
        }
        .page-hero .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25;
            z-index: 0;
        }
        .page-hero .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 15, 15, 0.92) 40%, rgba(26, 26, 26, 0.70) 100%);
            z-index: 1;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-hero h1 {
            font-size: 3.2rem;
            font-weight: 900;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: -1px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }
        .page-hero h1 i { color: var(--secondary); margin-right: 8px; }
        .page-hero p {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 700px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .page-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(201, 48, 44, 0.20);
            border: 1px solid rgba(201, 48, 44, 0.30);
            border-radius: 100px;
            padding: 8px 20px;
            color: var(--primary-light);
            font-size: 0.9rem;
            font-weight: 500;
            margin-bottom: 20px;
        }
        .page-hero .hero-badge i { color: var(--secondary); }

        @media (max-width: 768px) {
            .page-hero { padding: 70px 0 60px; min-height: 300px; }
            .page-hero h1 { font-size: 2.2rem; }
            .page-hero p { font-size: 1rem; }
        }
        @media (max-width: 520px) {
            .page-hero h1 { font-size: 1.8rem; }
            .page-hero p { font-size: 0.95rem; }
        }

        /* ===== Section Shared ===== */
        .section {
            padding: 80px 0;
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-dark .section-title,
        .section-dark .section-subtitle { color: var(--text-white); }
        .section-dark .section-title i { color: var(--secondary); }

        .section-title {
            font-size: 2.4rem;
            font-weight: 800;
            text-align: center;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }
        .section-title i { color: var(--primary); margin-right: 10px; }
        .section-subtitle {
            text-align: center;
            color: var(--text-secondary);
            font-size: 1.1rem;
            max-width: 650px;
            margin: 0 auto 48px;
            line-height: 1.6;
        }
        .section-dark .section-subtitle { color: rgba(255, 255, 255, 0.65); }

        @media (max-width: 768px) {
            .section { padding: 56px 0; }
            .section-title { font-size: 1.8rem; }
            .section-subtitle { font-size: 1rem; margin-bottom: 32px; }
        }

        /* ===== Card Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 28px;
        }
        .card-grid.two-col { grid-template-columns: repeat(2, 1fr); }
        .card-grid.four-col { grid-template-columns: repeat(4, 1fr); }

        @media (max-width: 900px) {
            .card-grid.two-col { grid-template-columns: 1fr; }
            .card-grid.four-col { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 560px) {
            .card-grid { grid-template-columns: 1fr; }
            .card-grid.four-col { grid-template-columns: 1fr; }
        }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .card-image {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: var(--radius-md) var(--radius-md) 0 0;
            display: block;
        }
        .card-body {
            padding: 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-body h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .card-body h3 a { color: var(--text-primary); }
        .card-body h3 a:hover { color: var(--primary); }
        .card-body p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.6;
            margin-bottom: 16px;
            flex: 1;
        }
        .card-body .card-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--bg-soft);
            color: var(--text-secondary);
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 0.8rem;
            font-weight: 500;
            align-self: flex-start;
            margin-bottom: 12px;
        }
        .card-body .card-tag i { color: var(--primary); }
        .card-footer-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-weight: 600;
            font-size: 0.9rem;
            margin-top: auto;
        }
        .card-footer-link i { transition: var(--transition); }
        .card-footer-link:hover i { transform: translateX(4px); }

        /* Dark card variant */
        .card-dark {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .card-dark .card-body h3 a { color: var(--text-white); }
        .card-dark .card-body p { color: rgba(255, 255, 255, 0.7); }
        .card-dark .card-body .card-tag { background: rgba(255, 255, 255, 0.08); color: rgba(255, 255, 255, 0.7); }

        /* ===== Steps ===== */
        .steps-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 32px;
            counter-reset: step;
        }
        .step-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            position: relative;
        }
        .step-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-lg);
        }
        .step-item::before {
            counter-increment: step;
            content: counter(step);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            font-size: 1.3rem;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .step-item h4 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step-item p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.6;
        }
        .step-item i { font-size: 2rem; color: var(--primary); margin-bottom: 12px; display: block; }

        @media (max-width: 768px) {
            .steps-list { grid-template-columns: 1fr; gap: 20px; }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-light);
        }
        .faq-item:hover { box-shadow: var(--shadow-md); }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-weight: 600;
            font-size: 1.05rem;
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            color: var(--text-primary);
            transition: var(--transition);
            gap: 16px;
        }
        .faq-question:hover { background: rgba(0, 0, 0, 0.02); }
        .faq-question i { color: var(--primary); font-size: 1.2rem; transition: var(--transition); }
        .faq-question .faq-toggle { color: var(--text-light); font-size: 1.1rem; transition: var(--transition); }
        .faq-item.open .faq-toggle { transform: rotate(180deg); color: var(--primary); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            line-height: 1.7;
            font-size: 0.95rem;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 24px 20px;
        }

        .section-dark .faq-item {
            background: rgba(255, 255, 255, 0.05);
            border-color: rgba(255, 255, 255, 0.08);
        }
        .section-dark .faq-question { color: var(--text-white); }
        .section-dark .faq-answer { color: rgba(255, 255, 255, 0.7); }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-darker);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.10;
            z-index: 0;
        }
        .cta-section .container { position: relative; z-index: 1; }
        .cta-section h2 {
            font-size: 2.6rem;
            font-weight: 900;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.15rem;
            max-width: 600px;
            margin: 0 auto 32px;
        }
        .cta-section .cta-button {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            background: var(--secondary);
            color: var(--bg-darker);
            padding: 16px 40px;
            border-radius: 100px;
            font-weight: 700;
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .cta-section .cta-button:hover {
            background: var(--secondary-light);
            color: var(--bg-darker);
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(240, 180, 0, 0.35);
        }

        @media (max-width: 768px) {
            .cta-section { padding: 56px 0; }
            .cta-section h2 { font-size: 1.8rem; }
            .cta-section p { font-size: 1rem; }
            .cta-section .cta-button { padding: 14px 28px; font-size: 1rem; }
        }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-item {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: 32px 16px;
            transition: var(--transition);
        }
        .stat-item:hover { background: rgba(255, 255, 255, 0.08); transform: translateY(-2px); }
        .stat-item .stat-number {
            font-size: 2.4rem;
            font-weight: 900;
            color: var(--secondary);
            margin-bottom: 4px;
        }
        .stat-item .stat-label {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.95rem;
        }

        @media (max-width: 768px) {
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .stat-item .stat-number { font-size: 1.8rem; }
        }
        @media (max-width: 480px) {
            .stats-grid { grid-template-columns: 1fr 1fr; }
        }

        /* ===== Safety Tips ===== */
        .tips-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }
        .tip-card {
            display: flex;
            gap: 16px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            align-items: flex-start;
        }
        .tip-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
        .tip-card .tip-icon {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            background: var(--bg-soft);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.3rem;
        }
        .tip-card .tip-content h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 4px; }
        .tip-card .tip-content p { color: var(--text-secondary); font-size: 0.9rem; line-height: 1.6; margin: 0; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-darker);
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .nav-logo { margin-bottom: 12px; }
        .footer-brand p { font-size: 0.95rem; line-height: 1.7; color: rgba(255, 255, 255, 0.6); max-width: 320px; }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-col ul li a:hover { color: var(--secondary); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a { color: var(--secondary); }
        .footer-bottom a:hover { color: var(--secondary-light); }

        @media (max-width: 900px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 560px) {
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .breadcrumb a { color: rgba(255, 255, 255, 0.7); }
        .breadcrumb a:hover { color: var(--secondary); }
        .breadcrumb span { color: rgba(255, 255, 255, 0.9); }
        .breadcrumb i { font-size: 0.7rem; color: rgba(255, 255, 255, 0.4); }

        /* ===== Misc ===== */
        .text-center { text-align: center; }
        .mt-2 { margin-top: 16px; }
        .mb-2 { margin-bottom: 16px; }
        .gap-1 { gap: 8px; }
        .gap-2 { gap: 16px; }

        .badge-download {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(46, 204, 113, 0.15);
            color: #2ecc71;
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 0.8rem;
            font-weight: 600;
        }
        .badge-download i { font-size: 0.9rem; }

        .platform-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--bg-soft);
            padding: 6px 16px;
            border-radius: 100px;
            font-size: 0.85rem;
            color: var(--text-secondary);
            font-weight: 500;
        }
        .platform-tag i { color: var(--primary); }

        /* ===== Featured Image Block ===== */
        .featured-image-block {
            display: flex;
            align-items: center;
            gap: 40px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .featured-image-block .fib-image {
            flex: 0 0 45%;
            min-height: 280px;
            background-size: cover;
            background-position: center;
        }
        .featured-image-block .fib-content {
            flex: 1;
            padding: 40px 40px 40px 0;
        }
        .featured-image-block .fib-content h3 {
            font-size: 1.6rem;
            font-weight: 800;
            margin-bottom: 12px;
        }
        .featured-image-block .fib-content p {
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .featured-image-block .fib-content .fib-meta {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-top: 16px;
        }

        @media (max-width: 860px) {
            .featured-image-block { flex-direction: column; }
            .featured-image-block .fib-image { flex: unset; width: 100%; min-height: 200px; }
            .featured-image-block .fib-content { padding: 24px; }
            .featured-image-block .fib-content h3 { font-size: 1.3rem; }
        }

        /* ===== Smooth fade-in on scroll (simple) ===== */
        .fade-in {
            opacity: 0;
            transform: translateY(20px);
            animation: fadeInUp 0.6s ease forwards;
        }
        @keyframes fadeInUp {
            to { opacity: 1; transform: translateY(0); }
        }

        /* ===== Focus Visible ===== */
        *:focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        /* ===== Responsive Fine-tune ===== */
        @media (max-width: 520px) {
            .page-hero h1 { font-size: 1.6rem; }
            .section-title { font-size: 1.5rem; }
            .step-item { padding: 24px 16px; }
            .faq-question { padding: 16px 18px; font-size: 0.95rem; }
            .cta-section h2 { font-size: 1.5rem; }
            .stat-item { padding: 20px 12px; }
            .stat-item .stat-number { font-size: 1.5rem; }
            .tip-card { flex-direction: column; }
            .featured-image-block .fib-content { padding: 16px; }
            .featured-image-block .fib-content h3 { font-size: 1.1rem; }
        }