/* roulang page: index */
:root {
            --primary: #FF6B35;
            --primary-dark: #E85A2B;
            --primary-glow: rgba(255, 107, 53, 0.18);
            --bg: #0D1117;
            --surface: #161B22;
            --surface-high: #1C242E;
            --surface-hover: #212A36;
            --muted-green: #3E5040;
            --khaki: #8B8265;
            --danger: #E5484D;
            --amber: #F5A623;
            --text-primary: #F0F3F6;
            --text-secondary: #B8BFC8;
            --text-muted: #7C8590;
            --border: #2D333B;
            --border-light: #3A424D;
            --radius-sm: 2px;
            --radius: 4px;
            --radius-lg: 8px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
            --shadow: 0 4px 12px rgba(0,0,0,0.4);
            --shadow-lg: 0 8px 24px rgba(0,0,0,0.55);
            --transition: 0.22s ease;
            --font-stack: 'Inter','SF Pro Display','Segoe UI',-apple-system,BlinkMacSystemFont,'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Noto Sans SC',sans-serif;
            --container-max: 1220px;
            --section-space: 68px;
        }
        * { box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-stack);
            background-color: var(--bg);
            color: var(--text-primary);
            line-height: 1.8;
            font-size: 1rem;
            margin: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition), opacity var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, select, textarea { font-family: inherit; }
        .container-custom { max-width: var(--container-max); margin: 0 auto; padding-left: 24px; padding-right: 24px; }
        .section-space { padding-top: var(--section-space); padding-bottom: var(--section-space); }
        .section-space-sm { padding-top: 40px; padding-bottom: 40px; }
        .section-alt { background-color: var(--surface); }
        .section-dark { background-color: var(--bg); }
        .section-angled { position: relative; overflow: hidden; }
        .section-angled::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0;
            height: 6px;
            background: repeating-linear-gradient(135deg, var(--primary) 0 20px, transparent 20px 40px);
            z-index: 1;
        }
        .tactical-grid {
            background-image: repeating-linear-gradient(0deg, transparent 0 31px, rgba(255,107,53,0.04) 31px 32px),
                              repeating-linear-gradient(90deg, transparent 0 31px, rgba(255,107,53,0.04) 31px 32px);
        }
        .h2-section {
            font-size: 1.85rem;
            font-weight: 800;
            letter-spacing: -0.01em;
            line-height: 1.35;
            margin-bottom: 18px;
            position: relative;
            padding-left: 20px;
            color: var(--text-primary);
        }
        .h2-section::before {
            content: '';
            position: absolute;
            left: 0; top: 8px;
            width: 4px; height: 28px;
            background: var(--primary);
        }
        .h2-section .h2-accent { color: var(--primary); }
        .section-desc {
            color: var(--text-secondary);
            font-size: 1.02rem;
            line-height: 1.75;
            margin-bottom: 36px;
            max-width: 760px;
        }
        .section-desc strong { color: var(--text-primary); font-weight: 600; }
        .card-dark {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition), background var(--transition);
        }
        .card-dark:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
            background: var(--surface-hover);
        }
        .badge-primary {
            background: var(--primary);
            color: #1a0d00;
            font-weight: 700;
            font-size: 0.75rem;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            letter-spacing: 0.02em;
        }
        .badge-outline {
            border: 1px solid var(--primary);
            color: var(--primary);
            font-weight: 600;
            font-size: 0.75rem;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            background: transparent;
        }
        .badge-amber {
            background: var(--amber);
            color: #1a1300;
            font-weight: 700;
            font-size: 0.72rem;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
        }
        .badge-danger {
            background: var(--danger);
            color: #fff;
            font-weight: 700;
            font-size: 0.72rem;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
        }
        .btn-primary-o {
            background: var(--primary);
            color: #1a0d00;
            font-weight: 700;
            border: none;
            border-radius: var(--radius-sm);
            padding: 12px 28px;
            font-size: 1rem;
            letter-spacing: 0.01em;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-primary-o:hover, .btn-primary-o:focus-visible {
            background: var(--primary-dark);
            color: #1a0d00;
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(255,107,53,0.4);
        }
        .btn-primary-o:active { transform: translateY(1px); box-shadow: none; }
        .btn-primary-o:focus-visible { outline: 3px solid rgba(255,107,53,0.5); outline-offset: 2px; }
        .btn-outline-o {
            background: transparent;
            color: var(--primary);
            font-weight: 700;
            border: 1px solid var(--primary);
            border-radius: var(--radius-sm);
            padding: 12px 28px;
            font-size: 1rem;
            transition: background var(--transition), color var(--transition), border-color var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-outline-o:hover, .btn-outline-o:focus-visible {
            background: var(--primary-glow);
            color: var(--primary);
            border-color: var(--primary-dark);
        }
        .btn-outline-o:focus-visible { outline: 3px solid rgba(255,107,53,0.4); outline-offset: 2px; }
        .btn-ghost {
            background: transparent;
            color: var(--text-secondary);
            border: none;
            padding: 6px 12px;
            font-size: 0.9rem;
            transition: color var(--transition);
        }
        .btn-ghost:hover { color: var(--primary); }
        .img-cover {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            border-radius: var(--radius-sm);
            background: var(--surface-high);
        }
        .img-cover-lg {
            width: 100%;
            aspect-ratio: 4/3;
            object-fit: cover;
            border-radius: var(--radius);
            background: var(--surface-high);
        }
        .corner-cut {
            position: relative;
            overflow: hidden;
        }
        .corner-cut::after {
            content: '';
            position: absolute;
            top: -20px; right: -20px;
            width: 50px; height: 50px;
            background: var(--primary);
            transform: rotate(45deg);
            opacity: 0.7;
        }
        .icon-circle {
            width: 48px; height: 48px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--surface-high);
            border: 1px solid var(--border);
            color: var(--primary);
            font-size: 1.2rem;
            flex-shrink: 0;
        }
        .icon-square {
            width: 54px; height: 54px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: var(--primary-glow);
            border: 1px solid rgba(255,107,53,0.3);
            color: var(--primary);
            font-size: 1.35rem;
            flex-shrink: 0;
        }
        .divider-orange {
            height: 3px;
            width: 60px;
            background: var(--primary);
            margin: 14px 0 22px;
        }
        .divider-thin {
            height: 1px;
            background: var(--border);
            margin: 22px 0;
        }
        .text-muted-o { color: var(--text-muted); }
        .text-secondary-o { color: var(--text-secondary); }
        .text-primary-o { color: var(--primary); }
        .fw-800 { font-weight: 800; }
        .fw-700 { font-weight: 700; }
        /* Header & Nav */
        .site-header {
            position: fixed;
            top: 0; left: 0; right: 0;
            z-index: 1050;
            background: rgba(13,17,23,0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 4px 16px rgba(0,0,0,0.5);
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 64px;
            flex-wrap: wrap;
            gap: 10px 20px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 800;
            font-size: 1.12rem;
            color: var(--text-primary);
            white-space: nowrap;
        }
        .nav-logo:hover { color: var(--text-primary); }
        .nav-logo .logo-mark {
            display: inline-flex;
            width: 36px; height: 36px;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #1a0d00;
            border-radius: var(--radius-sm);
            font-size: 1.1rem;
            font-weight: 900;
            flex-shrink: 0;
        }
        .nav-logo .logo-text {
            font-weight: 800;
            font-size: 1.05rem;
            letter-spacing: -0.01em;
        }
        .nav-logo .logo-text small {
            display: block;
            font-size: 0.7rem;
            font-weight: 500;
            color: var(--text-secondary);
            letter-spacing: 0.05em;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: wrap;
        }
        .nav-menu a {
            color: var(--text-secondary);
            font-weight: 600;
            font-size: 0.9rem;
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            letter-spacing: 0.01em;
            transition: color var(--transition), background var(--transition);
            white-space: nowrap;
        }
        .nav-menu a:hover {
            color: var(--primary);
            background: var(--primary-glow);
        }
        .nav-menu a.active {
            color: var(--primary);
            position: relative;
        }
        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: -2px; left: 12px; right: 12px;
            height: 2px;
            background: var(--primary);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .nav-search-btn {
            background: transparent;
            border: 1px solid var(--border);
            color: var(--text-secondary);
            width: 38px; height: 38px;
            border-radius: var(--radius-sm);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: border-color var(--transition), color var(--transition);
        }
        .nav-search-btn:hover { border-color: var(--primary); color: var(--primary); }
        .nav-toggle {
            background: transparent;
            border: 1px solid var(--border);
            color: var(--text-primary);
            width: 40px; height: 40px;
            border-radius: var(--radius-sm);
            display: none;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
        }
        /* Progress Steps */
        .progress-steps {
            background: var(--surface);
            border-top: 1px solid var(--border);
            padding: 8px 0;
        }
        .progress-steps .container-custom {
            display: flex;
            align-items: center;
            gap: 6px;
            overflow-x: auto;
            white-space: nowrap;
            scrollbar-width: none;
        }
        .progress-steps .container-custom::-webkit-scrollbar { display: none; }
        .step-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 12px;
            border-radius: var(--radius-sm);
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--text-muted);
            transition: color var(--transition), background var(--transition);
            flex-shrink: 0;
        }
        .step-item .step-num {
            width: 22px; height: 22px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            font-size: 0.72rem;
            font-weight: 700;
            background: var(--surface-high);
            color: var(--text-muted);
            flex-shrink: 0;
            transition: background var(--transition), color var(--transition);
        }
        .step-item.active {
            color: var(--primary);
            background: var(--primary-glow);
        }
        .step-item.active .step-num {
            background: var(--primary);
            color: #1a0d00;
        }
        .step-item:hover { color: var(--primary); }
        .step-arrow {
            color: var(--text-muted);
            font-size: 0.7rem;
            flex-shrink: 0;
            opacity: 0.6;
        }
        /* Hero */
        .hero-section {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            padding-top: 150px;
            padding-bottom: 80px;
            background-image: url('/assets/images/9a25c79b47b287a8.webp');
            background-size: cover;
            background-position: center;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(160deg, rgba(13,17,23,0.88) 0%, rgba(13,17,23,0.6) 50%, rgba(13,17,23,0.85) 100%);
            z-index: 1;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: repeating-linear-gradient(0deg, transparent 0 50px, rgba(255,107,53,0.03) 50px 51px),
                        repeating-linear-gradient(90deg, transparent 0 50px, rgba(255,107,53,0.03) 50px 51px);
            z-index: 2;
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            z-index: 3;
            max-width: 780px;
        }
        .hero-badge-row {
            display: flex;
            gap: 10px;
            align-items: center;
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .hero-level-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            border-radius: 20px;
            border: 1px solid rgba(255,107,53,0.5);
            background: rgba(255,107,53,0.1);
            color: var(--primary);
            font-weight: 700;
            font-size: 0.78rem;
            letter-spacing: 0.04em;
        }
        .hero-level-badge svg, .hero-level-badge i { font-size: 0.9rem; }
        .hero-level-badge.gold {
            border-color: rgba(245,166,35,0.6);
            background: rgba(245,166,35,0.1);
            color: var(--amber);
        }
        .hero-level-badge.diamond {
            border-color: rgba(200,180,255,0.6);
            background: rgba(200,180,255,0.08);
            color: #C8B4FF;
        }
        .hero-title {
            font-size: 2.9rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.25;
            margin-bottom: 22px;
            color: var(--text-primary);
        }
        .hero-title .highlight {
            color: var(--primary);
            position: relative;
        }
        .hero-title .highlight::after {
            content: '';
            position: absolute;
            bottom: 2px; left: 0; right: 0;
            height: 4px;
            background: var(--primary);
            opacity: 0.3;
        }
        .hero-desc {
            font-size: 1.08rem;
            line-height: 1.8;
            color: var(--text-secondary);
            margin-bottom: 30px;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 28px;
        }
        .hero-stats-row {
            display: flex;
            gap: 28px;
            flex-wrap: wrap;
        }
        .hero-stat-item {
            display: flex;
            flex-direction: column;
        }
        .hero-stat-number {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .hero-stat-label {
            font-size: 0.78rem;
            color: var(--text-muted);
            letter-spacing: 0.03em;
        }
        /* Sections */
        section { position: relative; }
        /* Entry Matrix */
        .entry-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 16px;
        }
        .entry-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 22px 20px;
            display: flex;
            align-items: center;
            gap: 14px;
            transition: border-color var(--transition), background var(--transition), transform var(--transition);
        }
        .entry-item:hover {
            border-color: var(--primary);
            background: var(--surface-hover);
            transform: translateY(-2px);
        }
        .entry-item .entry-icon {
            width: 44px; height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: var(--primary-glow);
            color: var(--primary);
            font-size: 1.3rem;
            flex-shrink: 0;
        }
        .entry-item .entry-label {
            font-weight: 700;
            color: var(--text-primary);
            font-size: 0.95rem;
        }
        .entry-item .entry-sub {
            font-size: 0.75rem;
            color: var(--text-muted);
            margin-top: 2px;
        }
        /* News CMS */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 18px;
        }
        .news-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
            height: 100%;
        }
        .news-card:hover {
            border-color: var(--primary);
            transform: translateY(-3px);
            box-shadow: var(--shadow-lg);
        }
        .news-card .news-img-wrap { overflow: hidden; }
        .news-card .news-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            transition: transform var(--transition);
        }
        .news-card:hover .news-img { transform: scale(1.04); }
        .news-card-body {
            padding: 18px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            flex: 1;
        }
        .news-card .news-title {
            font-size: 1.02rem;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card:hover .news-title { color: var(--primary); }
        .news-card .news-summary {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }
        .news-card .news-meta {
            display: flex;
            gap: 10px;
            align-items: center;
            font-size: 0.72rem;
            color: var(--text-muted);
            margin-top: auto;
        }
        .news-empty {
            background: var(--surface);
            border: 1px dashed var(--border-light);
            border-radius: var(--radius);
            padding: 40px;
            text-align: center;
            color: var(--text-muted);
            font-size: 0.95rem;
        }
        /* Topic Entry (分类入口) */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 18px;
        }
        .topic-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            background: var(--surface);
            transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
        }
        .topic-card:hover {
            border-color: var(--primary);
            transform: translateY(-3px);
            box-shadow: var(--shadow-lg);
        }
        .topic-card .topic-img {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
        }
        .topic-card .topic-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(13,17,23,0.92) 20%, rgba(13,17,23,0.2) 70%);
            display: flex;
            flex-direction: column;
            justify-content: flex-end;
            padding: 18px;
        }
        .topic-card .topic-name {
            font-weight: 800;
            font-size: 1.1rem;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .topic-card .topic-count {
            font-size: 0.75rem;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        /* Pain Points */
        .pain-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 16px;
        }
        .pain-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-left: 4px solid var(--primary);
            border-radius: var(--radius-sm);
            padding: 20px;
            transition: background var(--transition), border-color var(--transition);
        }
        .pain-card:hover {
            background: var(--surface-hover);
            border-color: var(--primary);
        }
        .pain-card .pain-title {
            font-weight: 700;
            font-size: 0.98rem;
            color: var(--text-primary);
            margin-bottom: 6px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .pain-card .pain-title i { color: var(--primary); font-size: 1.05rem; }
        .pain-card .pain-desc {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }
        /* Solution */
        .solution-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .solution-list {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .solution-list li {
            display: flex;
            gap: 14px;
            align-items: flex-start;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 14px 16px;
        }
        .solution-list .sol-num {
            width: 32px; height: 32px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #1a0d00;
            font-weight: 800;
            font-size: 0.85rem;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
        }
        .solution-list .sol-text {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .solution-list .sol-text strong { color: var(--text-primary); }
        .solution-img-wrap {
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-lg);
        }
        /* Steps */
        .steps-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
        }
        .step-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 22px;
            position: relative;
            transition: border-color var(--transition), background var(--transition);
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .step-card:hover {
            border-color: var(--primary);
            background: var(--surface-hover);
        }
        .step-card .step-badge {
            width: 40px; height: 40px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #1a0d00;
            font-weight: 800;
            font-size: 1.1rem;
            border-radius: var(--radius-sm);
        }
        .step-card .step-card-title {
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--text-primary);
        }
        .step-card .step-card-desc {
            font-size: 0.8rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        /* Results Data */
        .results-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 18px;
        }
        .result-number-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 26px 20px;
            text-align: center;
            transition: border-color var(--transition), background var(--transition);
        }
        .result-number-card:hover {
            border-color: var(--primary);
            background: var(--surface-hover);
        }
        .result-number-card .result-value {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .result-number-card .result-unit {
            font-size: 0.82rem;
            font-weight: 700;
            color: var(--text-secondary);
        }
        .result-number-card .result-label {
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-top: 6px;
        }
        /* Testimonials */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 18px;
        }
        .testimonial-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 22px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            transition: border-color var(--transition), background var(--transition);
        }
        .testimonial-card:hover {
            border-color: var(--primary);
            background: var(--surface-hover);
        }
        .testimonial-stars {
            color: var(--primary);
            font-size: 0.95rem;
            letter-spacing: 2px;
        }
        .testimonial-text {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.65;
            flex: 1;
        }
        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .testimonial-avatar {
            width: 36px; height: 36px;
            border-radius: 50%;
            background: var(--primary-glow);
            border: 1px solid rgba(255,107,53,0.4);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-weight: 700;
            font-size: 0.8rem;
        }
        .testimonial-author-name {
            font-weight: 600;
            font-size: 0.85rem;
            color: var(--text-primary);
        }
        .testimonial-author-tag {
            font-size: 0.72rem;
            color: var(--text-muted);
        }
        /* Audience */
        .audience-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
            gap: 14px;
        }
        .audience-chip {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 16px;
            text-align: center;
            transition: border-color var(--transition), background var(--transition), transform var(--transition);
        }
        .audience-chip:hover {
            border-color: var(--primary);
            background: var(--surface-hover);
            transform: translateY(-2px);
        }
        .audience-chip .audience-name {
            font-weight: 700;
            font-size: 0.92rem;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .audience-chip .audience-reason {
            font-size: 0.75rem;
            color: var(--text-muted);
            line-height: 1.5;
        }
        /* Changelog */
        .changelog-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .changelog-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 16px 20px;
            display: flex;
            align-items: flex-start;
            gap: 16px;
            transition: border-color var(--transition), background var(--transition);
        }
        .changelog-item:hover {
            border-color: var(--primary);
            background: var(--surface-hover);
        }
        .changelog-version {
            font-weight: 800;
            font-size: 0.82rem;
            color: var(--primary);
            background: var(--primary-glow);
            border: 1px solid rgba(255,107,53,0.3);
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
            white-space: nowrap;
        }
        .changelog-info {
            flex: 1;
        }
        .changelog-info .changelog-title {
            font-weight: 700;
            font-size: 0.92rem;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .changelog-info .changelog-desc {
            font-size: 0.82rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .changelog-date {
            font-size: 0.72rem;
            color: var(--text-muted);
            flex-shrink: 0;
            white-space: nowrap;
        }
        /* Multi-device */
        .device-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 18px;
        }
        .device-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px 18px;
            text-align: center;
            transition: border-color var(--transition), background var(--transition);
        }
        .device-card:hover {
            border-color: var(--primary);
            background: var(--surface-hover);
        }
        .device-card .device-icon {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .device-card .device-name {
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .device-card .device-desc {
            font-size: 0.8rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        /* Metrics Dashboard */
        .metrics-panel {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 24px;
        }
        .metric-item .metric-label {
            font-size: 0.8rem;
            color: var(--text-secondary);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .metric-item .metric-label i { color: var(--primary); }
        .metric-bar {
            height: 6px;
            background: var(--surface-high);
            border-radius: 3px;
            overflow: hidden;
        }
        .metric-bar .metric-fill {
            height: 100%;
            background: var(--primary);
            border-radius: 3px;
            transition: width 0.6s ease;
        }
        .metric-value {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--primary);
            margin-top: 6px;
        }
        /* Scenes */
        .scene-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 18px;
        }
        .scene-card {
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            background: var(--surface);
            transition: border-color var(--transition), transform var(--transition);
        }
        .scene-card:hover {
            border-color: var(--primary);
            transform: translateY(-3px);
        }
        .scene-card .scene-img {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
        }
        .scene-card .scene-info {
            padding: 14px 16px;
        }
        .scene-card .scene-name {
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--text-primary);
        }
        .scene-card .scene-desc {
            font-size: 0.8rem;
            color: var(--text-secondary);
            margin-top: 4px;
        }
        /* Features */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 18px;
        }
        .feature-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 24px;
            position: relative;
            transition: border-color var(--transition), background var(--transition);
        }
        .feature-card::after {
            content: '';
            position: absolute;
            top: -12px; right: -12px;
            width: 40px; height: 40px;
            background: var(--primary);
            opacity: 0.15;
            transform: rotate(45deg);
            pointer-events: none;
        }
        .feature-card:hover {
            border-color: var(--primary);
            background: var(--surface-hover);
        }
        .feature-card .feature-icon {
            font-size: 1.6rem;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .feature-card .feature-title {
            font-weight: 700;
            font-size: 0.98rem;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .feature-card .feature-desc {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }
        /* Ranking */
        .ranking-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 14px;
        }
        .ranking-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 14px 18px;
            display: flex;
            gap: 16px;
            align-items: flex-start;
            transition: border-color var(--transition), background var(--transition);
        }
        .ranking-item:hover {
            border-color: var(--primary);
            background: var(--surface-hover);
        }
        .ranking-num {
            font-size: 1.7rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
            min-width: 40px;
            text-align: center;
            flex-shrink: 0;
        }
        .ranking-info {
            flex: 1;
        }
        .ranking-info .ranking-title {
            font-weight: 700;
            font-size: 0.92rem;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .ranking-info .ranking-desc {
            font-size: 0.8rem;
            color: var(--text-secondary);
            line-height: 1.55;
        }
        .ranking-tags {
            display: flex;
            gap: 6px;
            margin-top: 6px;
            flex-wrap: wrap;
        }
        /* FAQ */
        .accordion-custom .accordion-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm) !important;
            margin-bottom: 10px;
            overflow: hidden;
        }
        .accordion-custom .accordion-button {
            background: var(--surface);
            color: var(--text-primary);
            font-weight: 700;
            font-size: 0.95rem;
            padding: 16px 20px;
            border: none;
            box-shadow: none;
            border-radius: var(--radius-sm) !important;
        }
        .accordion-custom .accordion-button:not(.collapsed) {
            background: var(--surface-high);
            color: var(--primary);
            border-left: 4px solid var(--primary);
        }
        .accordion-custom .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(255,107,53,0.25);
            border-color: var(--primary);
        }
        .accordion-custom .accordion-button::after {
            filter: invert(50%) sepia(50%) saturate(400%) hue-rotate(-10deg);
        }
        .accordion-custom .accordion-body {
            background: var(--bg);
            color: var(--text-secondary);
            font-size: 0.88rem;
            line-height: 1.7;
            padding: 16px 20px;
        }
        /* Tags */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tag-cloud a {
            background: var(--surface);
            border: 1px solid var(--border);
            color: var(--text-secondary);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            transition: border-color var(--transition), color var(--transition), background var(--transition);
        }
        .tag-cloud a:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-glow);
        }
        /* Compliance */
        .compliance-banner {
            background: rgba(245,166,35,0.08);
            border: 1px solid rgba(245,166,35,0.35);
            border-left: 4px solid var(--amber);
            border-radius: var(--radius-sm);
            padding: 20px 24px;
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }
        .compliance-banner i {
            color: var(--amber);
            font-size: 1.4rem;
            margin-top: 2px;
            flex-shrink: 0;
        }
        .compliance-banner .compliance-text {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .compliance-banner .compliance-text strong {
            color: var(--amber);
        }
        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, #FF6B35 0%, #E85A2B 100%);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: repeating-linear-gradient(0deg, transparent 0 40px, rgba(255,255,255,0.06) 40px 41px),
                        repeating-linear-gradient(90deg, transparent 0 40px, rgba(255,255,255,0.06) 40px 41px);
            pointer-events: none;
        }
        .cta-section .container-custom {
            position: relative;
            z-index: 2;
            text-align: center;
            padding-top: 60px;
            padding-bottom: 60px;
        }
        .cta-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: #1a0d00;
            margin-bottom: 14px;
        }
        .cta-sub {
            font-size: 1.05rem;
            color: rgba(26,13,0,0.75);
            margin-bottom: 30px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        .btn-cta-light {
            background: #1a0d00;
            color: #fff;
            font-weight: 700;
            border: none;
            border-radius: var(--radius-sm);
            padding: 14px 32px;
            font-size: 1rem;
            transition: background var(--transition), transform var(--transition);
        }
        .btn-cta-light:hover {
            background: #2a1a0a;
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-cta-ghost {
            background: transparent;
            color: #1a0d00;
            font-weight: 700;
            border: 2px solid #1a0d00;
            border-radius: var(--radius-sm);
            padding: 12px 30px;
            font-size: 1rem;
            transition: background var(--transition), color var(--transition);
        }
        .btn-cta-ghost:hover {
            background: #1a0d00;
            color: #fff;
        }
        /* Footer */
        .site-footer {
            background: var(--surface);
            border-top: 1px solid var(--border);
            position: relative;
        }
        .site-footer::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0;
            height: 4px;
            background: repeating-linear-gradient(135deg, var(--primary) 0 24px, transparent 24px 48px);
        }
        .footer-main {
            padding-top: 48px;
            padding-bottom: 32px;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 32px;
        }
        .footer-logo {
            font-weight: 800;
            font-size: 1.1rem;
            color: var(--text-primary);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-logo .logo-mark {
            width: 30px; height: 30px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--primary);
            color: #1a0d00;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
        }
        .footer-desc {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 340px;
        }
        .footer-col-title {
            font-weight: 700;
            font-size: 0.88rem;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.03em;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul a {
            color: var(--text-secondary);
            font-size: 0.84rem;
            transition: color var(--transition);
        }
        .footer-col ul a:hover { color: var(--primary); }
        .footer-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .footer-tags a {
            background: var(--surface-high);
            border: 1px solid var(--border);
            color: var(--text-secondary);
            padding: 4px 10px;
            border-radius: 14px;
            font-size: 0.72rem;
            transition: border-color var(--transition), color var(--transition);
        }
        .footer-tags a:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 18px 0;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
        }
        .footer-bottom .copyright {
            font-size: 0.78rem;
            color: var(--text-muted);
        }
        .footer-bottom .footer-legal {
            display: flex;
            gap: 18px;
            flex-wrap: wrap;
        }
        .footer-bottom .footer-legal a {
            font-size: 0.78rem;
            color: var(--text-muted);
            transition: color var(--transition);
        }
        .footer-bottom .footer-legal a:hover { color: var(--primary); }
        .footer-bottom .footer-icp {
            font-size: 0.72rem;
            color: var(--text-muted);
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .hero-title { font-size: 2.3rem; }
            .solution-layout { grid-template-columns: 1fr; gap: 28px; }
            .steps-row { grid-template-columns: repeat(2, 1fr); }
            .ranking-list { grid-template-columns: 1fr; }
            .footer-main { grid-template-columns: 1fr 1fr; gap: 24px; }
        }
        @media (max-width: 768px) {
            :root { --section-space: 48px; }
            .nav-toggle { display: inline-flex; }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: stretch;
                background: var(--surface);
                border-top: 1px solid var(--border);
                padding: 12px 0;
            }
            .nav-menu.open { display: flex; }
            .nav-menu a { padding: 10px 16px; }
            .nav-menu a.active::after { display: none; }
            .nav-actions { margin-left: auto; }
            .hero-section { padding-top: 130px; min-height: auto; }
            .hero-title { font-size: 2rem; }
            .hero-desc { font-size: 0.95rem; }
            .hero-actions { flex-direction: column; }
            .hero-actions .btn-primary-o, .hero-actions .btn-outline-o { width: 100%; justify-content: center; }
            .h2-section { font-size: 1.55rem; }
            .steps-row { grid-template-columns: 1fr; }
            .news-grid { grid-template-columns: 1fr; }
            .topic-grid { grid-template-columns: 1fr; }
            .entry-grid { grid-template-columns: 1fr 1fr; }
            .footer-main { grid-template-columns: 1fr; gap: 20px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-title { font-size: 1.7rem; }
            .metrics-panel { grid-template-columns: 1fr 1fr; gap: 16px; }
            .pain-grid { grid-template-columns: 1fr; }
            .testimonial-grid { grid-template-columns: 1fr; }
            .audience-grid { grid-template-columns: repeat(2, 1fr); }
            .scene-grid { grid-template-columns: 1fr; }
            .feature-grid { grid-template-columns: 1fr; }
            .device-grid { grid-template-columns: 1fr 1fr; }
            .changelog-item { flex-wrap: wrap; }
            .changelog-date { width: 100%; margin-left: 0; }
        }
        @media (max-width: 520px) {
            .container-custom { padding-left: 16px; padding-right: 16px; }
            .hero-title { font-size: 1.75rem; }
            .hero-stats-row { gap: 16px; }
            .entry-grid { grid-template-columns: 1fr; }
            .progress-steps .container-custom { gap: 2px; }
            .step-item { padding: 4px 8px; font-size: 0.7rem; }
            .step-item .step-num { width: 18px; height: 18px; font-size: 0.65rem; }
            .step-arrow { font-size: 0.6rem; }
            .metrics-panel { grid-template-columns: 1fr; }
            .audience-grid { grid-template-columns: 1fr; }
            .device-grid { grid-template-columns: 1fr; }
            .result-number-card .result-value { font-size: 2rem; }
            .h2-section { font-size: 1.4rem; padding-left: 16px; }
            .h2-section::before { top: 6px; height: 24px; }
        }

/* roulang page: article */
:root {
            --primary: #FF6B35;
            --primary-dark: #E85A2B;
            --primary-glow: rgba(255, 107, 53, 0.18);
            --bg: #0D1117;
            --surface: #161B22;
            --surface-high: #1C242E;
            --surface-hover: #212A36;
            --muted-green: #3E5040;
            --khaki: #8B8265;
            --danger: #E5484D;
            --amber: #F5A623;
            --text-primary: #F0F3F6;
            --text-secondary: #B8BFC8;
            --text-muted: #7C8590;
            --border: #2D333B;
            --border-light: #3A424D;
            --radius-sm: 2px;
            --radius: 4px;
            --radius-lg: 8px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
            --shadow: 0 4px 12px rgba(0,0,0,0.4);
            --shadow-lg: 0 8px 24px rgba(0,0,0,0.55);
            --transition: 0.22s ease;
            --font-stack: 'Inter','SF Pro Display','Segoe UI',-apple-system,BlinkMacSystemFont,'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Noto Sans SC',sans-serif;
            --container-max: 1220px;
            --section-space: 48px;
        }
        html { scroll-behavior: smooth; }
        * { box-sizing: border-box; }
        body {
            font-family: var(--font-stack);
            background-color: var(--bg);
            color: var(--text-primary);
            line-height: 1.8;
            font-size: 1rem;
            margin: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition), opacity var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, select, textarea { font-family: inherit; }
        :focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
        .container-custom { max-width: var(--container-max); margin: 0 auto; padding-left: 24px; padding-right: 24px; }
        .section-space { padding-top: var(--section-space); padding-bottom: var(--section-space); }
        .section-alt { background-color: var(--surface); }
        .section-dark { background-color: var(--bg); }
        .section-angled { position: relative; overflow: hidden; }
        .section-angled::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0;
            height: 6px;
            background: repeating-linear-gradient(135deg, var(--primary) 0 20px, transparent 20px 40px);
            z-index: 1;
        }
        .tactical-grid {
            background-image: repeating-linear-gradient(0deg, transparent 0 31px, rgba(255,107,53,0.04) 31px 32px),
                              repeating-linear-gradient(90deg, transparent 0 31px, rgba(255,107,53,0.04) 31px 32px);
        }
        .h2-section {
            font-size: 1.7rem;
            font-weight: 800;
            letter-spacing: -0.01em;
            line-height: 1.35;
            margin-bottom: 18px;
            position: relative;
            padding-left: 20px;
            color: var(--text-primary);
        }
        .h2-section::before {
            content: '';
            position: absolute;
            left: 0; top: 8px;
            width: 4px; height: 26px;
            background: var(--primary);
        }
        .h2-section .h2-accent { color: var(--primary); }
        .section-desc {
            color: var(--text-secondary);
            font-size: 1rem;
            line-height: 1.75;
            margin-bottom: 32px;
            max-width: 780px;
        }
        .card-dark {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition), background var(--transition);
        }
        .card-dark:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
            background: var(--surface-hover);
        }
        .badge-primary {
            background: var(--primary);
            color: #1a0d00;
            font-weight: 700;
            font-size: 0.75rem;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            letter-spacing: 0.02em;
            display: inline-block;
        }
        .badge-outline {
            border: 1px solid var(--primary);
            color: var(--primary);
            font-weight: 600;
            font-size: 0.75rem;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            background: transparent;
            display: inline-block;
        }
        .badge-amber {
            background: var(--amber);
            color: #1a1300;
            font-weight: 700;
            font-size: 0.72rem;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            display: inline-block;
        }
        .badge-danger {
            background: var(--danger);
            color: #fff;
            font-weight: 700;
            font-size: 0.72rem;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            display: inline-block;
        }
        .btn-primary-o {
            background: var(--primary);
            color: #1a0d00;
            font-weight: 700;
            border: none;
            border-radius: var(--radius-sm);
            padding: 12px 28px;
            font-size: 1rem;
            letter-spacing: 0.01em;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
            text-decoration: none;
        }
        .btn-primary-o:hover, .btn-primary-o:focus-visible {
            background: var(--primary-dark);
            color: #1a0d00;
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(255,107,53,0.4);
            text-decoration: none;
        }
        .btn-primary-o:active { transform: translateY(0); }
        .btn-outline-o {
            background: transparent;
            color: var(--primary);
            font-weight: 600;
            border: 1px solid var(--primary);
            border-radius: var(--radius-sm);
            padding: 11px 26px;
            font-size: 0.95rem;
            transition: background var(--transition), color var(--transition), transform var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
            text-decoration: none;
        }
        .btn-outline-o:hover, .btn-outline-o:focus-visible {
            background: var(--primary-glow);
            color: var(--primary);
            transform: translateY(-1px);
            text-decoration: none;
        }

        /* Header / Nav */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(13,17,23,0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            padding: 14px 0;
            flex-wrap: wrap;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-primary);
            text-decoration: none;
            font-weight: 700;
            font-size: 1.1rem;
            line-height: 1.3;
        }
        .nav-logo:hover { color: var(--text-primary); }
        .logo-mark {
            width: 38px;
            height: 38px;
            background: var(--primary);
            color: #1a0d00;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            font-size: 1.1rem;
            flex-shrink: 0;
            clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
        }
        .logo-text { display: flex; flex-direction: column; line-height: 1.35; }
        .logo-text small { color: var(--text-secondary); font-weight: 400; font-size: 0.72rem; letter-spacing: 0.04em; }
        .nav-menu { display: flex; align-items: center; gap: 26px; flex-wrap: wrap; }
        .nav-menu a {
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.9rem;
            padding: 6px 2px;
            position: relative;
            text-decoration: none;
            transition: color var(--transition);
        }
        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: width var(--transition);
        }
        .nav-menu a:hover, .nav-menu a.active { color: var(--primary); }
        .nav-menu a:hover::after, .nav-menu a.active::after { width: 100%; }
        .nav-actions { display: flex; align-items: center; gap: 10px; }
        .nav-search-btn {
            background: transparent;
            border: 1px solid var(--border);
            color: var(--text-secondary);
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: border-color var(--transition), color var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }
        .nav-search-btn:hover { border-color: var(--primary); color: var(--primary); }
        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--border);
            color: var(--text-primary);
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            cursor: pointer;
            font-size: 1.1rem;
            align-items: center;
            justify-content: center;
        }
        .progress-steps {
            background: rgba(62,80,64,0.25);
            border-top: 1px solid var(--border);
            padding: 8px 0;
        }
        .progress-steps .container-custom {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
        }
        .step-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--text-muted);
            font-size: 0.78rem;
            font-weight: 500;
            text-decoration: none;
            padding: 3px 6px;
            border-radius: var(--radius-sm);
            transition: color var(--transition), background var(--transition);
        }
        .step-item .step-num {
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: var(--surface-high);
            border: 1px solid var(--border-light);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            font-weight: 700;
            color: var(--text-muted);
            transition: background var(--transition), color var(--transition), border-color var(--transition);
        }
        .step-item.active { color: var(--primary); }
        .step-item.active .step-num {
            background: var(--primary);
            border-color: var(--primary);
            color: #1a0d00;
        }
        .step-item:hover { color: var(--primary); }
        .step-arrow { color: var(--text-muted); font-size: 0.65rem; }

        /* Breadcrumb */
        .breadcrumb-area {
            padding: 18px 0 10px;
            font-size: 0.85rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .breadcrumb-area a { color: var(--text-secondary); }
        .breadcrumb-area a:hover { color: var(--primary); }
        .breadcrumb-area .crumb-sep { color: var(--border-light); }
        .breadcrumb-area .crumb-current { color: var(--text-primary); font-weight: 500; }

        /* Article header area */
        .article-head-section {
            padding: 30px 0 18px;
            background: var(--bg);
            position: relative;
            overflow: hidden;
        }
        .article-head-section::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0;
            height: 4px;
            background: repeating-linear-gradient(135deg, var(--primary) 0 16px, transparent 16px 32px);
        }
        .article-h1 {
            font-size: 2.1rem;
            font-weight: 800;
            letter-spacing: -0.015em;
            line-height: 1.4;
            margin-bottom: 14px;
            color: var(--text-primary);
        }
        .article-meta-bar {
            display: flex;
            align-items: center;
            gap: 18px;
            flex-wrap: wrap;
            padding: 12px 0;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        .article-meta-bar span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        .article-meta-bar i { color: var(--primary); font-size: 0.8rem; }

        /* Article content */
        .article-content-area {
            background: var(--bg);
        }
        .article-body {
            max-width: 820px;
            margin: 0 auto;
            padding: 28px 0 40px;
        }
        .article-body p {
            font-size: 1.02rem;
            line-height: 2;
            color: var(--text-primary);
            margin-bottom: 1.5em;
        }
        .article-body h2 {
            font-size: 1.45rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 2em 0 0.9em;
            padding-left: 16px;
            border-left: 4px solid var(--primary);
            line-height: 1.4;
        }
        .article-body h3 {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text-primary);
            margin: 1.6em 0 0.7em;
            line-height: 1.45;
        }
        .article-body ul, .article-body ol {
            margin: 0 0 1.5em 0;
            padding-left: 1.6em;
            color: var(--text-secondary);
            line-height: 1.9;
        }
        .article-body ul li, .article-body ol li { margin-bottom: 0.5em; }
        .article-body ul li::marker { color: var(--primary); }
        .article-body ol li::marker { color: var(--primary); font-weight: 700; }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: var(--surface);
            padding: 18px 22px;
            margin: 1.8em 0;
            border-radius: 0 var(--radius) var(--radius) 0;
            color: var(--text-secondary);
            font-style: italic;
            line-height: 1.85;
        }
        .article-body img {
            border-radius: var(--radius);
            margin: 1.8em 0;
            border: 1px solid var(--border);
            width: 100%;
            height: auto;
        }
        .article-body pre {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 18px;
            overflow-x: auto;
            font-size: 0.88rem;
            line-height: 1.7;
            color: var(--text-secondary);
            margin: 1.5em 0;
        }
        .article-body code {
            background: var(--surface-high);
            padding: 2px 6px;
            border-radius: var(--radius-sm);
            font-size: 0.88em;
            color: var(--primary);
        }
        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-body a:hover { color: var(--primary-dark); }

        /* Summary panel */
        .article-summary-panel {
            background: var(--surface);
            border: 1px solid var(--border);
            border-left: 4px solid var(--primary);
            border-radius: var(--radius);
            padding: 20px 24px;
            margin-bottom: 28px;
        }
        .article-summary-panel .summary-label {
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 8px;
            display: block;
        }
        .article-summary-panel p {
            color: var(--text-secondary);
            line-height: 1.85;
            margin: 0;
            font-size: 0.97rem;
        }

        /* Related articles */
        .related-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }
        .related-card-img {
            aspect-ratio: 16 / 9;
            object-fit: cover;
            width: 100%;
            border-bottom: 1px solid var(--border);
        }
        .related-card-body { padding: 16px 18px 18px; display: flex; flex-direction: column; flex: 1; }
        .related-card-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.5;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card-title a { color: var(--text-primary); text-decoration: none; }
        .related-card-title a:hover { color: var(--primary); }
        .related-card-desc {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card-meta {
            margin-top: auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.75rem;
            color: var(--text-muted);
            padding-top: 10px;
            border-top: 1px solid var(--border);
        }

        /* Back to category */
        .back-category-block {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }
        .back-category-text {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.6;
        }
        .back-category-text strong { color: var(--text-primary); }

        /* Tag board */
        .tag-board {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tag-chip {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 6px 14px;
            border-radius: 50px;
            background: var(--surface);
            border: 1px solid var(--border);
            color: var(--text-secondary);
            font-size: 0.82rem;
            font-weight: 500;
            text-decoration: none;
            transition: border-color var(--transition), color var(--transition), background var(--transition);
        }
        .tag-chip:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-glow);
        }
        .tag-chip i { font-size: 0.7rem; color: var(--primary); }

        /* Copyright notice */
        .copyright-notice {
            background: rgba(245,166,35,0.06);
            border: 1px solid rgba(245,166,35,0.25);
            border-left: 4px solid var(--amber);
            border-radius: var(--radius);
            padding: 18px 22px;
            display: flex;
            align-items: flex-start;
            gap: 12px;
            color: var(--text-secondary);
            font-size: 0.88rem;
            line-height: 1.75;
        }
        .copyright-notice i {
            color: var(--amber);
            font-size: 1.1rem;
            margin-top: 3px;
            flex-shrink: 0;
        }

        /* Prev/Next navigation */
        .prev-next-nav {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .prev-next-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 16px 20px;
            display: flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
            color: var(--text-primary);
            transition: border-color var(--transition), background var(--transition), transform var(--transition);
        }
        .prev-next-item:hover {
            border-color: var(--primary);
            background: var(--surface-hover);
            transform: translateX(-2px);
            color: var(--text-primary);
        }
        .prev-next-item.next:hover { transform: translateX(2px); }
        .prev-next-item .pn-icon {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-sm);
            background: var(--bg);
            border: 1px solid var(--border);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            flex-shrink: 0;
        }
        .prev-next-item .pn-label {
            font-size: 0.7rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.06em;
        }
        .prev-next-item .pn-title {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.45;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .prev-next-item.next { justify-content: flex-end; text-align: right; }
        .prev-next-item.next .pn-content { text-align: right; }

        /* Footer */
        .site-footer {
            background: #0A0E13;
            border-top: 1px solid var(--border);
            padding-top: 48px;
            padding-bottom: 20px;
            margin-top: 20px;
            position: relative;
        }
        .site-footer::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0;
            height: 5px;
            background: repeating-linear-gradient(135deg, var(--primary) 0 24px, transparent 24px 48px);
        }
        .footer-main {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 32px;
            padding-bottom: 32px;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .footer-logo .logo-mark {
            width: 30px;
            height: 30px;
            font-size: 0.9rem;
        }
        .footer-desc {
            color: var(--text-muted);
            font-size: 0.85rem;
            line-height: 1.75;
            max-width: 400px;
        }
        .footer-col-title {
            font-weight: 700;
            color: var(--text-primary);
            font-size: 0.9rem;
            margin-bottom: 14px;
            letter-spacing: 0.03em;
        }
        .site-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer ul li { margin-bottom: 8px; }
        .site-footer ul li a {
            color: var(--text-muted);
            font-size: 0.85rem;
            text-decoration: none;
            transition: color var(--transition);
        }
        .site-footer ul li a:hover { color: var(--primary); }
        .footer-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-tags a {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 50px;
            background: var(--surface);
            border: 1px solid var(--border);
            color: var(--text-secondary);
            font-size: 0.75rem;
            text-decoration: none;
            transition: border-color var(--transition), color var(--transition);
        }
        .footer-tags a:hover { border-color: var(--primary); color: var(--primary); }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
            padding-top: 20px;
            border-top: 1px solid var(--border);
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .footer-bottom a {
            color: var(--text-muted);
            text-decoration: none;
            margin-right: 16px;
            transition: color var(--transition);
        }
        .footer-bottom a:hover { color: var(--primary); }
        .footer-icp { color: var(--text-muted); }

        /* Empty state */
        .empty-state {
            background: var(--surface);
            border: 1px dashed var(--border-light);
            border-radius: var(--radius);
            padding: 40px 24px;
            text-align: center;
            color: var(--text-muted);
        }
        .empty-state i {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 12px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .footer-main { grid-template-columns: 1fr 1fr 1fr; }
            .footer-main > div:first-child { grid-column: 1 / -1; }
        }
        @media (max-width: 768px) {
            .nav-toggle { display: inline-flex; }
            .nav-menu {
                display: none;
                width: 100%;
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
                padding: 16px 0 10px;
            }
            .nav-menu.open { display: flex; }
            .nav-menu a { font-size: 0.95rem; }
            .progress-steps .container-custom { gap: 6px; }
            .step-item { font-size: 0.7rem; }
            .step-item .step-num { width: 18px; height: 18px; font-size: 0.6rem; }
            .step-arrow { display: none; }
            .article-h1 { font-size: 1.6rem; }
            .article-meta-bar { gap: 10px; font-size: 0.78rem; }
            .article-body p { font-size: 0.97rem; }
            .prev-next-nav { grid-template-columns: 1fr; }
            .prev-next-item.next { justify-content: flex-start; text-align: left; }
            .prev-next-item.next .pn-content { text-align: left; }
            .footer-main { grid-template-columns: 1fr; gap: 20px; }
            .back-category-block { flex-direction: column; align-items: flex-start; }
        }
        @media (max-width: 520px) {
            .container-custom { padding-left: 16px; padding-right: 16px; }
            .nav-logo { font-size: 0.95rem; }
            .logo-text small { font-size: 0.62rem; }
            .article-h1 { font-size: 1.4rem; }
            .h2-section { font-size: 1.4rem; }
            .btn-primary-o, .btn-outline-o { padding: 10px 20px; font-size: 0.9rem; }
            .article-meta-bar span { font-size: 0.72rem; }
        }

/* roulang page: category1 */
:root {
            --primary: #FF6B35;
            --primary-dark: #E85A2B;
            --primary-glow: rgba(255, 107, 53, 0.18);
            --bg: #0D1117;
            --surface: #161B22;
            --surface-high: #1C242E;
            --surface-hover: #212A36;
            --muted-green: #3E5040;
            --khaki: #8B8265;
            --danger: #E5484D;
            --amber: #F5A623;
            --text-primary: #F0F3F6;
            --text-secondary: #B8BFC8;
            --text-muted: #7C8590;
            --border: #2D333B;
            --border-light: #3A424D;
            --radius-sm: 2px;
            --radius: 4px;
            --radius-lg: 8px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
            --shadow: 0 4px 12px rgba(0,0,0,0.4);
            --shadow-lg: 0 8px 24px rgba(0,0,0,0.55);
            --transition: 0.22s ease;
            --font-stack: 'Inter','SF Pro Display','Segoe UI',-apple-system,BlinkMacSystemFont,'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Noto Sans SC',sans-serif;
            --container-max: 1220px;
            --section-space: 48px;
        }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-stack);
            background-color: var(--bg);
            color: var(--text-primary);
            line-height: 1.8;
            font-size: 1rem;
            margin: 0;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition), opacity var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, select, textarea { font-family: inherit; }
        .container-custom { max-width: var(--container-max); margin: 0 auto; padding-left: 24px; padding-right: 24px; }
        .section-space { padding-top: var(--section-space); padding-bottom: var(--section-space); }
        .section-space-sm { padding-top: 36px; padding-bottom: 36px; }
        .section-alt { background-color: var(--surface); }
        .section-dark { background-color: var(--bg); }
        .section-angled { position: relative; overflow: hidden; }
        .section-angled::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0;
            height: 6px;
            background: repeating-linear-gradient(135deg, var(--primary) 0 20px, transparent 20px 40px);
            z-index: 1;
        }
        .tactical-grid {
            background-image: repeating-linear-gradient(0deg, transparent 0 31px, rgba(255,107,53,0.04) 31px 32px),
                              repeating-linear-gradient(90deg, transparent 0 31px, rgba(255,107,53,0.04) 31px 32px);
        }
        .h2-section {
            font-size: 1.85rem;
            font-weight: 800;
            letter-spacing: -0.01em;
            line-height: 1.35;
            margin-bottom: 18px;
            position: relative;
            padding-left: 20px;
            color: var(--text-primary);
        }
        .h2-section::before {
            content: '';
            position: absolute;
            left: 0; top: 8px;
            width: 4px; height: 28px;
            background: var(--primary);
        }
        .h2-section .h2-accent { color: var(--primary); }
        .section-desc {
            color: var(--text-secondary);
            font-size: 1.02rem;
            line-height: 1.75;
            margin-bottom: 36px;
            max-width: 760px;
        }
        .section-desc strong { color: var(--text-primary); font-weight: 600; }
        .card-dark {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition), background var(--transition);
        }
        .card-dark:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
            background: var(--surface-hover);
        }
        .badge-primary {
            background: var(--primary);
            color: #1a0d00;
            font-weight: 700;
            font-size: 0.75rem;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            letter-spacing: 0.02em;
            display: inline-block;
        }
        .badge-outline {
            border: 1px solid var(--primary);
            color: var(--primary);
            font-weight: 600;
            font-size: 0.75rem;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            background: transparent;
            display: inline-block;
        }
        .badge-amber {
            background: var(--amber);
            color: #1a1300;
            font-weight: 700;
            font-size: 0.72rem;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            display: inline-block;
        }
        .badge-danger {
            background: var(--danger);
            color: #fff;
            font-weight: 700;
            font-size: 0.72rem;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            display: inline-block;
        }
        .btn-primary-o {
            background: var(--primary);
            color: #1a0d00;
            font-weight: 700;
            border: none;
            border-radius: var(--radius-sm);
            padding: 12px 28px;
            font-size: 1rem;
            letter-spacing: 0.01em;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
        }
        .btn-primary-o:hover, .btn-primary-o:focus-visible {
            background: var(--primary-dark);
            color: #1a0d00;
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(255,107,53,0.4);
        }
        .btn-primary-o:active { transform: translateY(0); box-shadow: var(--shadow-sm); }
        .btn-outline-o {
            background: transparent;
            color: var(--primary);
            font-weight: 700;
            border: 1px solid var(--primary);
            border-radius: var(--radius-sm);
            padding: 12px 24px;
            font-size: 1rem;
            transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
        }
        .btn-outline-o:hover, .btn-outline-o:focus-visible {
            background: var(--primary-glow);
            color: var(--primary);
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(255,107,53,0.2);
        }
        .btn-outline-o:active { transform: translateY(0); }
        .btn-light-o {
            background: #fff;
            color: #1a0d00;
            font-weight: 800;
            border: none;
            border-radius: var(--radius-sm);
            padding: 14px 32px;
            font-size: 1.05rem;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            cursor: pointer;
        }
        .btn-light-o:hover, .btn-light-o:focus-visible {
            background: #f0f3f6;
            color: #1a0d00;
            transform: translateY(-1px);
            box-shadow: 0 6px 18px rgba(0,0,0,0.3);
        }

        /* Header */
        .site-header {
            background: rgba(13, 17, 23, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .nav-wrap {
            display: flex;
            align-items: center;
            gap: 24px;
            min-height: 62px;
            flex-wrap: wrap;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 1.1rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.01em;
            white-space: nowrap;
        }
        .nav-logo:hover { color: var(--text-primary); opacity: 0.9; }
        .logo-mark {
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #1a0d00;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius);
            font-size: 1rem;
            flex-shrink: 0;
        }
        .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.25;
        }
        .logo-text small {
            font-size: 0.7rem;
            font-weight: 400;
            color: var(--text-secondary);
            letter-spacing: 0.06em;
        }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 20px;
            margin-left: auto;
            flex-wrap: wrap;
        }
        .nav-menu a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            padding: 8px 2px;
            transition: color var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: 0; left: 0; right: 100%;
            height: 2px;
            background: var(--primary);
            transition: right var(--transition);
        }
        .nav-menu a:hover { color: var(--primary); }
        .nav-menu a.active { color: var(--primary); font-weight: 600; }
        .nav-menu a.active::after { right: 0; }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .nav-search-btn {
            background: transparent;
            border: 1px solid var(--border);
            color: var(--text-secondary);
            width: 38px;
            height: 38px;
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: border-color var(--transition), color var(--transition);
        }
        .nav-search-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--border);
            color: var(--text-primary);
            width: 40px;
            height: 40px;
            border-radius: var(--radius);
            font-size: 1.2rem;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            transition: border-color var(--transition), color var(--transition);
        }
        .nav-toggle:hover { border-color: var(--primary); color: var(--primary); }

        /* Progress Steps */
        .progress-steps {
            background: rgba(22, 27, 34, 0.85);
            border-top: 1px solid var(--border);
            padding: 8px 0;
        }
        .progress-steps .container-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .progress-steps .container-custom::-webkit-scrollbar { display: none; }
        .step-item {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--text-muted);
            font-size: 0.8rem;
            font-weight: 500;
            white-space: nowrap;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            transition: color var(--transition), background var(--transition);
            flex-shrink: 0;
        }
        .step-item:hover { color: var(--text-primary); background: var(--surface-hover); }
        .step-item.active { color: var(--primary); font-weight: 600; }
        .step-num {
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: var(--border);
            color: var(--text-secondary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            font-weight: 700;
            flex-shrink: 0;
        }
        .step-item.active .step-num {
            background: var(--primary);
            color: #1a0d00;
        }
        .step-arrow {
            color: var(--border-light);
            font-size: 0.65rem;
            flex-shrink: 0;
        }

        /* Breadcrumb area */
        .breadcrumb-bar {
            padding: 22px 0 0;
            background: var(--bg);
        }
        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .breadcrumb-nav a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }
        .breadcrumb-nav a:hover { color: var(--primary); }
        .breadcrumb-sep { color: var(--border-light); font-size: 0.7rem; }
        .breadcrumb-current { color: var(--text-primary); font-weight: 500; }

        /* Category header */
        .category-header {
            padding: 28px 0 20px;
            background: var(--bg);
            position: relative;
            overflow: hidden;
        }
        .category-header::before {
            content: '';
            position: absolute;
            top: 0; right: 0; bottom: 0;
            width: 40%;
            background: linear-gradient(270deg, rgba(255,107,53,0.06), transparent);
            pointer-events: none;
        }
        .category-header h1 {
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: -0.01em;
            line-height: 1.3;
            margin: 0;
            color: var(--text-primary);
            position: relative;
            z-index: 1;
        }
        .category-header h1 .h1-accent { color: var(--primary); }

        /* Category intro panel */
        .category-intro-panel {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 32px;
            box-shadow: var(--shadow);
            border-left: 4px solid var(--primary);
            position: relative;
        }
        .category-intro-panel::after {
            content: '';
            position: absolute;
            top: 0; right: 0;
            width: 120px;
            height: 4px;
            background: repeating-linear-gradient(90deg, var(--primary) 0 12px, transparent 12px 24px);
        }
        .category-intro-panel h2 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .category-intro-panel p {
            color: var(--text-secondary);
            font-size: 0.98rem;
            line-height: 1.8;
            margin: 0;
        }
        .category-intro-panel p strong { color: var(--primary); }

        /* Filter bar */
        .filter-bar {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: wrap;
            padding: 16px 0;
        }
        .filter-tag {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            background: var(--surface);
            color: var(--text-secondary);
            font-size: 0.85rem;
            font-weight: 500;
            cursor: pointer;
            transition: border-color var(--transition), color var(--transition), background var(--transition);
            white-space: nowrap;
        }
        .filter-tag:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .filter-tag.active {
            background: var(--primary);
            color: #1a0d00;
            border-color: var(--primary);
            font-weight: 700;
        }

        /* Watch cards */
        .watch-card {
            border-radius: var(--radius);
            overflow: hidden;
            transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition), background var(--transition);
            display: flex;
            flex-direction: column;
        }
        .watch-card-link {
            display: flex;
            flex-direction: column;
            height: 100%;
            color: inherit;
        }
        .watch-card-link:hover { color: inherit; }
        .watch-card-img {
            position: relative;
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--surface);
        }
        .watch-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition);
        }
        .watch-card:hover .watch-card-img img { transform: scale(1.04); }
        .watch-card-img .badge-primary {
            position: absolute;
            top: 10px;
            left: 10px;
            z-index: 2;
        }
        .watch-card-body {
            padding: 18px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .watch-card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin: 0;
            color: var(--text-primary);
            line-height: 1.4;
        }
        .watch-card-body p {
            color: var(--text-secondary);
            font-size: 0.88rem;
            line-height: 1.6;
            margin: 0;
            flex: 1;
        }
        .watch-card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-top: 4px;
            flex-wrap: wrap;
        }
        .watch-card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        .watch-card-meta i { color: var(--primary); font-size: 0.7rem; }

        /* Topic cards */
        .topic-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
            display: block;
        }
        .topic-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-lg);
            transform: translateY(-2px);
        }
        .topic-card-img {
            aspect-ratio: 16/9;
            overflow: hidden;
            background: var(--surface-high);
        }
        .topic-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition);
        }
        .topic-card:hover .topic-card-img img { transform: scale(1.04); }
        .topic-card-body {
            padding: 16px 18px;
        }
        .topic-card-body h3 {
            font-size: 0.95rem;
            font-weight: 700;
            margin: 0 0 6px;
            color: var(--text-primary);
        }
        .topic-card-body .topic-count {
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        /* Data blocks */
        .data-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .data-block {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 22px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: border-color var(--transition), transform var(--transition);
        }
        .data-block:hover {
            border-color: var(--primary);
            transform: translateY(-2px);
        }
        .data-num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            letter-spacing: -0.01em;
        }
        .data-label {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin-top: 6px;
        }

        /* Tag cloud */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tag-pill {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: 20px;
            border: 1px solid var(--border);
            background: var(--surface);
            color: var(--text-secondary);
            font-size: 0.85rem;
            font-weight: 500;
            transition: border-color var(--transition), color var(--transition), background var(--transition);
        }
        .tag-pill:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-glow);
        }

        /* Notice panel */
        .notice-panel {
            background: var(--surface);
            border: 1px solid var(--border);
            border-left: 4px solid var(--amber);
            border-radius: var(--radius);
            padding: 24px 28px;
            box-shadow: var(--shadow);
        }
        .notice-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 10px 0;
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.7;
        }
        .notice-item:not(:last-child) { border-bottom: 1px dashed var(--border); }
        .notice-item i {
            color: var(--amber);
            font-size: 0.9rem;
            margin-top: 3px;
            flex-shrink: 0;
        }

        /* CTA panel */
        .cta-panel {
            background: linear-gradient(135deg, var(--primary) 0%, #D95227 100%);
            border-radius: var(--radius-lg);
            padding: 52px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: 0 8px 28px rgba(255,107,53,0.3);
        }
        .cta-panel::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: repeating-linear-gradient(0deg, transparent 0 39px, rgba(255,255,255,0.06) 39px 40px),
                              repeating-linear-gradient(90deg, transparent 0 39px, rgba(255,255,255,0.06) 39px 40px);
            pointer-events: none;
        }
        .cta-panel h2 {
            font-size: 1.9rem;
            font-weight: 800;
            color: #1a0d00;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }
        .cta-panel p {
            font-size: 1.05rem;
            color: rgba(26, 13, 0, 0.8);
            margin-bottom: 28px;
            position: relative;
            z-index: 1;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-panel .cta-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }
        .cta-panel .btn-outline-white {
            background: transparent;
            color: #1a0d00;
            font-weight: 700;
            border: 2px solid #1a0d00;
            border-radius: var(--radius-sm);
            padding: 12px 26px;
            font-size: 1rem;
            transition: background var(--transition), transform var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
        }
        .cta-panel .btn-outline-white:hover {
            background: rgba(26, 13, 0, 0.1);
            transform: translateY(-1px);
        }

        /* Footer */
        .site-footer {
            background: var(--surface);
            border-top: 1px solid var(--border);
            padding-top: 48px;
            margin-top: 0;
            position: relative;
        }
        .site-footer::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0;
            height: 5px;
            background: repeating-linear-gradient(135deg, var(--primary) 0 16px, transparent 16px 32px);
        }
        .footer-main {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 36px;
            padding-bottom: 32px;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 14px;
        }
        .footer-desc {
            color: var(--text-muted);
            font-size: 0.88rem;
            line-height: 1.7;
            max-width: 300px;
            margin: 0;
        }
        .footer-col-title {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.03em;
        }
        .footer-main ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-main ul li { margin-bottom: 8px; }
        .footer-main ul li a {
            color: var(--text-secondary);
            font-size: 0.85rem;
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-main ul li a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-tags a {
            color: var(--text-secondary);
            font-size: 0.78rem;
            padding: 6px 12px;
            border: 1px solid var(--border);
            border-radius: 16px;
            transition: border-color var(--transition), color var(--transition), background var(--transition);
        }
        .footer-tags a:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-glow);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            padding: 18px 0;
            border-top: 1px solid var(--border);
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .copyright { flex-shrink: 0; }
        .footer-legal {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .footer-legal a {
            color: var(--text-muted);
            transition: color var(--transition);
        }
        .footer-legal a:hover { color: var(--primary); }
        .footer-icp { margin-left: auto; }

        /* Responsive */
        @media (max-width: 992px) {
            .nav-wrap { gap: 16px; }
            .nav-menu { gap: 14px; }
            .nav-menu a { font-size: 0.82rem; }
            .footer-main { grid-template-columns: repeat(2, 1fr); gap: 24px; }
            .data-grid { grid-template-columns: repeat(2, 1fr); }
            .category-header h1 { font-size: 1.9rem; }
        }
        @media (max-width: 768px) {
            .nav-toggle { display: flex; }
            .nav-menu {
                display: none;
                flex-direction: column;
                width: 100%;
                padding: 12px 0;
                gap: 4px;
                margin-left: 0;
                order: 10;
            }
            .nav-menu.open { display: flex; }
            .nav-menu a { padding: 10px 0; font-size: 0.9rem; width: 100%; }
            .nav-menu a::after { display: none; }
            .nav-actions { margin-left: auto; }
            .progress-steps .container-custom { gap: 4px; }
            .step-item { font-size: 0.7rem; padding: 3px 8px; }
            .step-num { width: 18px; height: 18px; font-size: 0.6rem; }
            .category-header h1 { font-size: 1.6rem; }
            .data-grid { grid-template-columns: repeat(2, 1fr); }
            .cta-panel { padding: 36px 20px; }
            .cta-panel h2 { font-size: 1.5rem; }
            .footer-main { grid-template-columns: 1fr; gap: 20px; }
            .footer-bottom { flex-direction: column; align-items: flex-start; gap: 10px; }
            .footer-icp { margin-left: 0; }
            .h2-section { font-size: 1.5rem; }
        }
        @media (max-width: 520px) {
            .container-custom { padding-left: 16px; padding-right: 16px; }
            .category-header h1 { font-size: 1.4rem; }
            .filter-tag { padding: 6px 12px; font-size: 0.78rem; }
            .data-grid { grid-template-columns: 1fr; }
            .cta-panel .cta-actions { flex-direction: column; }
            .cta-panel .btn-light-o,
            .cta-panel .btn-outline-white { width: 100%; justify-content: center; }
            .category-intro-panel { padding: 20px 18px; }
            .notice-panel { padding: 18px 16px; }
        }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}