/* roulang page: index */
:root {
            --primary: #2563EB;
            --primary-light: #3B82F6;
            --primary-bg: #EFF6FF;
            --accent: #F97316;
            --accent-hover: #EA580C;
            --success: #10B981;
            --surface: #FFFFFF;
            --bg: #F8FAFC;
            --text: #0F172A;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --border-light: #F1F5F9;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
            --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.06);
            --shadow-lg: 0 8px 32px rgba(15, 23, 42, 0.08);
            --shadow-hover: 0 12px 40px rgba(37, 99, 235, 0.15);
            --transition: 0.2s ease;
            --font-cn: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
            --font-num: "Roboto", "Segoe UI", "Helvetica Neue", sans-serif;
            --bottom-bar-height: 64px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-cn);
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            padding-bottom: var(--bottom-bar-height);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

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

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

        a:hover {
            color: var(--primary-light);
        }

        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            transition: all var(--transition);
        }

        button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

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

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
        }

        .font-num {
            font-family: var(--font-num);
        }

        .card-base {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-md);
        }

        .section-pad {
            padding-top: 80px;
            padding-bottom: 80px;
        }

        @media (max-width: 768px) {
            .section-pad {
                padding-top: 48px;
                padding-bottom: 48px;
            }
        }

        .card-inner {
            padding: 32px;
        }

        @media (max-width: 520px) {
            .card-inner {
                padding: 20px;
            }
        }

        /* Header Navigation */
        .site-header {
            position: sticky;
            top: 16px;
            z-index: 60;
            padding: 0 16px;
        }

        .nav-card {
            background: var(--surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-md);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 20px;
            max-width: 1200px;
            margin: 0 auto;
            transition: box-shadow var(--transition);
        }

        .nav-card:hover {
            box-shadow: var(--shadow-lg);
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: var(--text);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }

        .nav-logo:hover {
            color: var(--primary);
        }

        .nav-logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
        }

        .nav-link-item {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 16px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            white-space: nowrap;
        }

        .nav-link-item:hover {
            background: var(--primary-bg);
            color: var(--primary);
        }

        .nav-link-item.active {
            background: var(--primary-bg);
            color: var(--primary);
            font-weight: 600;
        }

        .nav-link-item i {
            font-size: 14px;
            width: 18px;
            text-align: center;
        }

        .nav-cta {
            background: var(--accent);
            color: #fff;
            padding: 10px 20px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: all var(--transition);
            box-shadow: 0 2px 8px rgba(249, 115, 22, 0.3);
        }

        .nav-cta:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(249, 115, 22, 0.4);
        }

        .hamburger {
            display: none;
            font-size: 22px;
            color: var(--text);
            padding: 8px;
            border-radius: 8px;
            transition: background var(--transition);
        }

        .hamburger:hover {
            background: var(--bg);
        }

        .mobile-menu {
            display: none;
            position: absolute;
            top: 100%;
            left: 16px;
            right: 16px;
            margin-top: 8px;
            background: var(--surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-lg);
            padding: 16px;
            flex-direction: column;
            gap: 6px;
            z-index: 100;
        }

        .mobile-menu.open {
            display: flex;
        }

        .mobile-menu .nav-link-item {
            width: 100%;
            padding: 12px 16px;
            border-radius: 10px;
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .hamburger {
                display: block;
            }

            .nav-cta {
                display: none;
            }

            .nav-card {
                position: relative;
            }
        }

        /* Hero Section */
        .hero-wrap {
            padding-top: 40px;
            padding-bottom: 80px;
            position: relative;
            overflow: hidden;
        }

        .hero-wrap::before {
            content: '';
            position: absolute;
            top: -180px;
            right: -180px;
            width: 520px;
            height: 520px;
            background: radial-gradient(circle, rgba(37, 99, 235, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-card {
            background: var(--surface);
            border-radius: var(--radius-xl);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-lg);
            padding: 48px 44px;
            position: relative;
            overflow: hidden;
        }

        .hero-card::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: -100px;
            width: 320px;
            height: 320px;
            background: radial-gradient(circle, rgba(16, 185, 129, 0.04) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            position: relative;
            z-index: 2;
        }

        .hero-text {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-bg);
            color: var(--primary);
            padding: 6px 14px;
            border-radius: 9999px;
            font-size: 13px;
            font-weight: 500;
            width: fit-content;
        }

        .hero-badge i {
            font-size: 12px;
        }

        .hero-title {
            font-size: 42px;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.02em;
            color: var(--text);
        }

        .hero-subtitle {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 520px;
        }

        .hero-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 600;
            transition: all var(--transition);
            line-height: 1.2;
            justify-content: center;
        }

        .btn-primary {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 16px rgba(249, 115, 22, 0.35);
        }

        .btn-primary:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(249, 115, 22, 0.45);
        }

        .btn-secondary {
            background: var(--primary-bg);
            color: var(--primary);
            border: 1px solid rgba(37, 99, 235, 0.2);
        }

        .btn-secondary:hover {
            background: #DBEAFE;
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.15);
        }

        .hero-demo {
            background: var(--bg);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            padding: 24px;
            display: flex;
            flex-direction: column;
            gap: 16px;
            min-height: 320px;
        }

        .hero-demo-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .hero-demo-title {
            font-weight: 600;
            font-size: 16px;
            color: var(--text);
        }

        .live-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(16, 185, 129, 0.1);
            color: var(--success);
            padding: 4px 10px;
            border-radius: 9999px;
            font-size: 12px;
            font-weight: 600;
        }

        .live-dot {
            width: 7px;
            height: 7px;
            background: var(--success);
            border-radius: 50%;
            animation: pulse-dot 1.5s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.5;
                transform: scale(1.5);
            }
        }

        .hero-demo-score {
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: var(--surface);
            border-radius: 10px;
            padding: 16px 20px;
            border: 1px solid var(--border-light);
        }

        .demo-team {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 4px;
        }

        .demo-team-name {
            font-weight: 600;
            font-size: 14px;
            color: var(--text);
        }

        .demo-score-num {
            font-family: var(--font-num);
            font-size: 32px;
            font-weight: 700;
            color: var(--text);
            line-height: 1;
        }

        .demo-vs {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 500;
        }

        .hero-demo-info {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .demo-stat {
            flex: 1;
            min-width: 80px;
            background: var(--surface);
            border-radius: 10px;
            padding: 12px 14px;
            border: 1px solid var(--border-light);
            text-align: center;
        }

        .demo-stat-label {
            font-size: 12px;
            color: var(--text-muted);
        }

        .demo-stat-value {
            font-family: var(--font-num);
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
        }

        @media (max-width: 768px) {
            .hero-card {
                padding: 28px 20px;
            }

            .hero-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .hero-title {
                font-size: 32px;
            }

            .hero-subtitle {
                font-size: 16px;
            }

            .hero-demo {
                min-height: auto;
            }

            .hero-wrap {
                padding-top: 24px;
                padding-bottom: 48px;
            }
        }

        /* Section titles */
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-bg);
            padding: 4px 12px;
            border-radius: 9999px;
            margin-bottom: 12px;
            width: fit-content;
        }

        .section-title {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.01em;
            color: var(--text);
            margin-bottom: 16px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 720px;
            margin-bottom: 32px;
        }

        @media (max-width: 520px) {
            .section-title {
                font-size: 24px;
            }

            .section-desc {
                font-size: 15px;
            }
        }

        /* Real-time data strip */
        .data-strip-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .data-strip-card {
            background: var(--surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            padding: 20px 18px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            transition: all var(--transition);
        }

        .data-strip-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .data-strip-num {
            font-family: var(--font-num);
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1;
            letter-spacing: -0.01em;
        }

        .data-strip-label {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 500;
        }

        @media (max-width: 768px) {
            .data-strip-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }

            .data-strip-num {
                font-size: 26px;
            }
        }

        @media (max-width: 375px) {
            .data-strip-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Feature cards */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .feature-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            padding: 28px 24px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            transition: all var(--transition);
        }

        .feature-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: rgba(37, 99, 235, 0.25);
        }

        .feature-icon {
            width: 48px;
            height: 48px;
            background: var(--primary-bg);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--primary);
        }

        .feature-title {
            font-size: 22px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.3;
        }

        .feature-desc {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
        }

        .feature-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .feature-link:hover {
            color: var(--primary-light);
            gap: 8px;
        }

        @media (max-width: 768px) {
            .feature-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* Scenario demo */
        .scenario-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            padding: 32px;
            display: grid;
            grid-template-columns: 280px 1fr;
            gap: 28px;
        }

        .scenario-tabs {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .scenario-tab {
            padding: 16px 18px;
            border-radius: 12px;
            background: var(--bg);
            border: 1px solid var(--border-light);
            text-align: left;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
        }

        .scenario-tab:hover {
            background: var(--primary-bg);
            color: var(--primary);
            border-color: rgba(37, 99, 235, 0.2);
        }

        .scenario-tab.active {
            background: var(--primary-bg);
            color: var(--primary);
            border-color: rgba(37, 99, 235, 0.3);
            font-weight: 600;
        }

        .scenario-content {
            background: var(--bg);
            border-radius: 12px;
            border: 1px solid var(--border-light);
            padding: 24px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            min-height: 200px;
        }

        .scenario-content-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
        }

        .scenario-content-desc {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

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

            .scenario-tabs {
                flex-direction: row;
                flex-wrap: wrap;
            }

            .scenario-tab {
                flex: 1;
                min-width: 100px;
                text-align: center;
                padding: 12px 14px;
                font-size: 14px;
            }
        }

        /* Social proof */
        .social-proof-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            padding: 28px 32px;
            display: flex;
            flex-wrap: wrap;
            gap: 28px 48px;
            align-items: center;
            justify-content: center;
        }

        .social-proof-item {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .social-proof-icon {
            width: 36px;
            height: 36px;
            background: var(--primary-bg);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 14px;
            flex-shrink: 0;
        }

        .social-proof-text {
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: 500;
            white-space: nowrap;
        }

        .social-proof-num {
            font-family: var(--font-num);
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
        }

        @media (max-width: 520px) {
            .social-proof-card {
                padding: 20px;
                gap: 16px;
                justify-content: flex-start;
            }

            .social-proof-text {
                font-size: 13px;
                white-space: normal;
            }
        }

        /* Comparison table */
        .comparison-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 15px;
        }

        .comparison-table th {
            background: var(--bg);
            padding: 18px 20px;
            text-align: left;
            font-weight: 600;
            color: var(--text);
            border-bottom: 1px solid var(--border);
            font-size: 14px;
        }

        .comparison-table td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border-light);
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .comparison-table tr:last-child td {
            border-bottom: none;
        }

        .comparison-table th.highlight-col {
            background: var(--primary-bg);
            color: var(--primary);
        }

        .comparison-table td.highlight-col {
            color: var(--primary);
            font-weight: 500;
        }

        .comparison-table th.muted-col {
            color: var(--text-muted);
        }

        .comparison-table td.muted-col {
            color: var(--text-muted);
        }

        @media (max-width: 768px) {
            .comparison-table {
                font-size: 14px;
            }

            .comparison-table th,
            .comparison-table td {
                padding: 12px 14px;
            }
        }

        /* News cards */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .news-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }

        .news-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }

        .news-image {
            aspect-ratio: 16/9;
            background: #E2E8F0;
            overflow: hidden;
            position: relative;
        }

        .news-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .news-date {
            font-size: 12px;
            color: var(--text-muted);
            font-weight: 500;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .news-card-body {
            padding: 20px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            flex: 1;
        }

        .news-card-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
        }

        .news-card-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
        }

        @media (max-width: 768px) {
            .news-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* FAQ */
        .faq-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            padding: 32px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            border: 1px solid var(--border-light);
            border-radius: 12px;
            overflow: hidden;
            transition: all var(--transition);
            background: var(--surface);
        }

        .faq-item:hover {
            border-color: rgba(37, 99, 235, 0.2);
        }

        .faq-item summary {
            padding: 18px 20px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            list-style: none;
            user-select: none;
            transition: all var(--transition);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary::after {
            content: '\f107';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            color: var(--text-muted);
            transition: transform var(--transition);
        }

        .faq-item[open] summary::after {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-item summary:hover {
            color: var(--primary);
        }

        .faq-answer {
            padding: 0 20px 18px 20px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        @media (max-width: 520px) {
            .faq-card {
                padding: 20px;
            }

            .faq-item summary {
                padding: 14px 16px;
                font-size: 15px;
            }

            .faq-answer {
                padding: 0 16px 14px 16px;
                font-size: 14px;
            }
        }

        /* Guarantee strip */
        .guarantee-card {
            background: #F0F7FF;
            border-radius: var(--radius-lg);
            border: 1px solid rgba(37, 99, 235, 0.15);
            box-shadow: var(--shadow-sm);
            padding: 24px 32px;
            display: flex;
            flex-wrap: wrap;
            gap: 16px 36px;
            align-items: center;
            justify-content: center;
        }

        .guarantee-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
        }

        .guarantee-icon {
            width: 22px;
            height: 22px;
            background: var(--success);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 10px;
            flex-shrink: 0;
        }

        @media (max-width: 520px) {
            .guarantee-card {
                padding: 20px;
                gap: 12px 20px;
                justify-content: flex-start;
            }

            .guarantee-item {
                font-size: 13px;
                white-space: normal;
            }
        }

        /* Brand intro */
        .brand-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            display: grid;
            grid-template-columns: 320px 1fr;
        }

        .brand-image {
            background: #E2E8F0;
            min-height: 260px;
            position: relative;
            overflow: hidden;
        }

        .brand-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: absolute;
            inset: 0;
        }

        .brand-body {
            padding: 32px;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .brand-body h3 {
            font-size: 22px;
            font-weight: 600;
            color: var(--text);
        }

        .brand-body p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.9;
        }

        @media (max-width: 768px) {
            .brand-card {
                grid-template-columns: 1fr;
            }

            .brand-image {
                min-height: 200px;
            }

            .brand-body {
                padding: 24px 20px;
            }
        }

        /* League cards */
        .league-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .league-card {
            background: var(--surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            padding: 20px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            transition: all var(--transition);
        }

        .league-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: rgba(37, 99, 235, 0.25);
        }

        .league-name {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .league-name i {
            color: var(--primary);
            font-size: 16px;
        }

        .league-status {
            font-size: 13px;
            color: var(--success);
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .league-matches {
            font-size: 14px;
            color: var(--text-secondary);
            font-family: var(--font-num);
        }

        @media (max-width: 768px) {
            .league-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
        }

        @media (max-width: 375px) {
            .league-grid {
                grid-template-columns: 1fr;
            }
        }

        /* Data service */
        .service-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            padding: 32px;
            display: grid;
            grid-template-columns: 300px 1fr;
            gap: 28px;
            align-items: center;
        }

        .service-tags {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .service-tag {
            background: var(--bg);
            border: 1px solid var(--border-light);
            border-radius: 10px;
            padding: 16px 18px;
            transition: all var(--transition);
        }

        .service-tag:hover {
            background: var(--primary-bg);
            border-color: rgba(37, 99, 235, 0.2);
        }

        .service-tag-name {
            font-weight: 600;
            font-size: 15px;
            color: var(--text);
            margin-bottom: 4px;
        }

        .service-tag-desc {
            font-size: 14px;
            color: var(--text-secondary);
        }

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

        /* Expert cards */
        .expert-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .expert-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            padding: 24px;
            display: flex;
            gap: 16px;
            transition: all var(--transition);
        }

        .expert-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .expert-avatar {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary-bg);
            flex-shrink: 0;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 22px;
            font-weight: 700;
        }

        .expert-avatar img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .expert-info {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .expert-name {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 500;
        }

        .expert-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
        }

        .expert-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .expert-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .expert-card {
                padding: 18px;
            }
        }

        /* Usage guide */
        .guide-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            padding: 32px;
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .guide-step {
            display: flex;
            flex-direction: column;
            gap: 10px;
            background: var(--bg);
            border-radius: 12px;
            padding: 20px;
            border: 1px solid var(--border-light);
        }

        .guide-step-num {
            width: 36px;
            height: 36px;
            background: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 16px;
            font-family: var(--font-num);
        }

        .guide-step-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
        }

        .guide-step-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .guide-card {
                grid-template-columns: 1fr;
                padding: 20px;
                gap: 14px;
            }
        }

        /* Bottom CTA */
        .bottom-cta-card {
            background: linear-gradient(135deg, #1E3A8A, #2563EB);
            border-radius: var(--radius-xl);
            border: 1px solid rgba(255, 255, 255, 0.1);
            box-shadow: 0 8px 40px rgba(37, 99, 235, 0.35);
            padding: 48px 44px;
            text-align: center;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 18px;
            color: #fff;
        }

        .bottom-cta-card h2 {
            font-size: 30px;
            font-weight: 700;
            letter-spacing: -0.01em;
            color: #fff;
        }

        .bottom-cta-card p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 520px;
            line-height: 1.8;
        }

        .bottom-cta-card .btn-primary {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 20px rgba(249, 115, 22, 0.45);
            font-size: 17px;
            padding: 16px 36px;
        }

        .bottom-cta-card .btn-primary:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 32px rgba(249, 115, 22, 0.55);
        }

        @media (max-width: 520px) {
            .bottom-cta-card {
                padding: 32px 20px;
                gap: 14px;
            }

            .bottom-cta-card h2 {
                font-size: 24px;
            }

            .bottom-cta-card p {
                font-size: 15px;
            }
        }

        /* Fixed bottom bar */
        .fixed-bottom-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 50;
            background: var(--surface);
            border-top: 1px solid var(--border);
            box-shadow: 0 -4px 20px rgba(15, 23, 42, 0.08);
            padding: 10px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            height: var(--bottom-bar-height);
        }

        .fixed-bottom-text {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .fixed-bottom-btn {
            background: var(--accent);
            color: #fff;
            padding: 10px 22px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: all var(--transition);
            box-shadow: 0 2px 10px rgba(249, 115, 22, 0.3);
        }

        .fixed-bottom-btn:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(249, 115, 22, 0.4);
        }

        @media (max-width: 520px) {
            .fixed-bottom-bar {
                padding: 8px 16px;
                gap: 10px;
            }

            .fixed-bottom-text {
                font-size: 13px;
            }

            .fixed-bottom-btn {
                font-size: 13px;
                padding: 8px 16px;
            }
        }

        /* Footer */
        .site-footer {
            background: #0F172A;
            border-radius: 20px 20px 0 0;
            margin-top: 60px;
            padding: 48px 32px 40px;
            color: rgba(255, 255, 255, 0.75);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 36px;
            max-width: 1200px;
            margin: 0 auto;
        }

        .footer-brand h4 {
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.65);
            max-width: 360px;
        }

        .footer-col h5 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 14px;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
            transition: color var(--transition);
        }

        .footer-col a:hover {
            color: #fff;
        }

        .footer-bottom {
            max-width: 1200px;
            margin: 28px auto 0;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            flex-wrap: wrap;
            gap: 12px 24px;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 13px;
        }

        .footer-bottom a:hover {
            color: #fff;
        }

        .footer-legal {
            display: flex;
            flex-wrap: wrap;
            gap: 8px 18px;
            align-items: center;
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .site-footer {
                padding: 36px 20px 32px;
                border-radius: 16px 16px 0 0;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }

        /* Utility */
        .gap-32 {
            gap: 32px;
        }

        .mb-32 {
            margin-bottom: 32px;
        }

        .mt-32 {
            margin-top: 32px;
        }

        @media (max-width: 520px) {
            .gap-32 {
                gap: 24px;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #2563EB;
            --primary-light: #3B82F6;
            --primary-bg: #EFF6FF;
            --accent: #F97316;
            --accent-hover: #EA580C;
            --success: #10B981;
            --surface: #FFFFFF;
            --bg: #F8FAFC;
            --text: #0F172A;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --border-light: #F1F5F9;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
            --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.06);
            --shadow-lg: 0 8px 32px rgba(15, 23, 42, 0.08);
            --shadow-hover: 0 12px 40px rgba(37, 99, 235, 0.15);
            --transition: 0.2s ease;
            --font-cn: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
            --font-num: "Roboto", "Segoe UI", "Helvetica Neue", sans-serif;
            --bottom-bar-height: 64px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-cn);
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            padding-bottom: var(--bottom-bar-height);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-light);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            transition: all var(--transition);
        }
        button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .card-base {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-md);
        }
        .card-inner {
            padding: 32px;
        }
        .section-pad {
            padding-top: 64px;
            padding-bottom: 64px;
        }
        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.01em;
            margin-bottom: 8px;
        }
        .section-subtitle {
            font-size: 15px;
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            line-height: 1.5;
        }
        .badge-primary {
            background: var(--primary-bg);
            color: var(--primary);
        }
        .badge-success {
            background: #ECFDF5;
            color: var(--success);
        }
        .badge-accent {
            background: #FFF7ED;
            color: var(--accent);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            transition: all var(--transition);
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 2px 8px rgba(249, 115, 22, 0.3);
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(249, 115, 22, 0.4);
        }
        .btn-secondary {
            background: var(--primary-bg);
            color: var(--primary);
            border: 1px solid var(--border);
        }
        .btn-secondary:hover {
            background: #DBEAFE;
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.15);
        }
        /* Header Navigation */
        .site-header {
            position: sticky;
            top: 16px;
            z-index: 60;
            padding: 0 16px;
        }
        .nav-card {
            background: var(--surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-md);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 20px;
            max-width: 1200px;
            margin: 0 auto;
            transition: box-shadow var(--transition);
        }
        .nav-card:hover {
            box-shadow: var(--shadow-lg);
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: var(--text);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }
        .nav-logo:hover {
            color: var(--primary);
        }
        .nav-logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
        }
        .nav-link-item {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 16px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-link-item:hover {
            background: var(--primary-bg);
            color: var(--primary);
        }
        .nav-link-item.active {
            background: var(--primary-bg);
            color: var(--primary);
            font-weight: 600;
        }
        .nav-link-item i {
            font-size: 14px;
            width: 18px;
            text-align: center;
        }
        .nav-cta {
            background: var(--accent);
            color: #fff;
            padding: 10px 20px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: all var(--transition);
            box-shadow: 0 2px 8px rgba(249, 115, 22, 0.3);
        }
        .nav-cta:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(249, 115, 22, 0.4);
        }
        .hamburger {
            display: none;
            font-size: 22px;
            color: var(--text);
            padding: 8px;
            border-radius: 8px;
            transition: background var(--transition);
        }
        .hamburger:hover {
            background: var(--border-light);
        }
        .mobile-menu {
            display: none;
            position: absolute;
            top: calc(100% + 8px);
            left: 0;
            right: 0;
            background: var(--surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-lg);
            padding: 12px;
            flex-direction: column;
            gap: 4px;
            z-index: 70;
        }
        .mobile-menu.open {
            display: flex;
        }
        /* Page Hero */
        .page-hero {
            position: relative;
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-md);
            padding: 48px 40px;
            margin-top: 32px;
            overflow: hidden;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 260px;
            height: 260px;
            background: radial-gradient(circle, rgba(37,99,235,0.05), transparent 70%);
            pointer-events: none;
        }
        .page-hero h1 {
            font-size: 42px;
            font-weight: 700;
            letter-spacing: -0.01em;
            color: var(--text);
            margin-bottom: 16px;
            position: relative;
            z-index: 1;
        }
        .page-hero p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 680px;
            position: relative;
            z-index: 1;
        }
        /* Cards */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 24px;
        }
        .card-item {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-md);
            overflow: hidden;
            transition: all var(--transition);
        }
        .card-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .card-image {
            width: 100%;
            aspect-ratio: 16/9;
            background-color: #E2E8F0;
            background-size: cover;
            background-position: center;
            position: relative;
            overflow: hidden;
        }
        .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .card-body {
            padding: 20px 24px 24px;
        }
        .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 10px;
            flex-wrap: wrap;
        }
        .card-meta span {
            font-size: 12px;
            color: var(--text-muted);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        /* Stats Row */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .stat-cell {
            text-align: center;
            padding: 20px 16px;
            background: var(--surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }
        .stat-number {
            font-family: var(--font-num);
            font-size: 28px;
            font-weight: 700;
            color: var(--primary);
            display: block;
            margin-bottom: 4px;
        }
        .stat-label {
            font-size: 13px;
            color: var(--text-muted);
        }
        /* Schedule List */
        .schedule-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .schedule-card {
            display: flex;
            gap: 16px;
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-md);
            padding: 20px;
            transition: all var(--transition);
        }
        .schedule-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }
        .schedule-img {
            width: 100px;
            height: 100px;
            border-radius: var(--radius-md);
            background-color: #E2E8F0;
            background-size: cover;
            background-position: center;
            flex-shrink: 0;
            overflow: hidden;
        }
        .schedule-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .schedule-info h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .schedule-info p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 8px;
        }
        .schedule-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        /* Focus Cards */
        .focus-cards {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }
        .focus-card {
            background: var(--surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            padding: 20px;
            transition: all var(--transition);
        }
        .focus-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .focus-card h5 {
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .focus-card p {
            font-size: 13px;
            color: var(--text-secondary);
        }
        /* Topic Entry */
        .topic-entry-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }
        .topic-tag {
            background: var(--surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            padding: 20px;
            text-align: center;
            transition: all var(--transition);
            display: block;
        }
        .topic-tag:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: var(--primary-light);
        }
        .topic-tag i {
            font-size: 28px;
            color: var(--primary);
            margin-bottom: 10px;
            display: block;
        }
        .topic-tag span {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
        }
        /* FAQ */
        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 16px 0;
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-item summary {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            list-style: none;
            padding: 4px 0;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary .faq-icon {
            font-size: 14px;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item[open] summary .faq-icon {
            transform: rotate(180deg);
        }
        .faq-item p {
            font-size: 14px;
            color: var(--text-secondary);
            padding: 12px 0 4px;
            line-height: 1.7;
        }
        /* CTA Section */
        .cta-card {
            background: linear-gradient(135deg, #EFF6FF, #DBEAFE);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            padding: 40px 36px;
            text-align: center;
        }
        .cta-card h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }
        .cta-card p {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 20px;
        }
        /* Bottom Fixed Bar */
        .bottom-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 50;
            background: var(--surface);
            border-top: 1px solid var(--border);
            box-shadow: 0 -4px 16px rgba(15, 23, 42, 0.06);
            padding: 10px 16px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
        }
        .bottom-bar-text {
            font-size: 14px;
            color: var(--text-secondary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .bottom-bar .btn {
            flex-shrink: 0;
            padding: 10px 18px;
            font-size: 13px;
        }
        /* Footer */
        .site-footer {
            background: var(--surface);
            border-top: 1px solid var(--border);
            padding: 48px 24px 32px;
            margin-top: 64px;
        }
        .site-footer .container {
            max-width: 1200px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 400px;
        }
        .footer-col h5 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 12px;
            text-transform: uppercase;
            letter-spacing: 0.02em;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--primary);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-light);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .footer-legal {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .footer-legal a {
            color: var(--text-muted);
        }
        .footer-legal a:hover {
            color: var(--primary);
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .schedule-list {
                grid-template-columns: 1fr;
            }
            .focus-cards {
                grid-template-columns: 1fr 1fr;
            }
            .topic-entry-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .mobile-menu {
                display: none;
            }
            .mobile-menu.open {
                display: flex;
            }
            .page-hero {
                padding: 32px 24px;
            }
            .page-hero h1 {
                font-size: 32px;
            }
            .section-pad {
                padding-top: 48px;
                padding-bottom: 48px;
            }
            .card-inner {
                padding: 20px;
            }
            .section-title {
                font-size: 24px;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .stat-number {
                font-size: 22px;
            }
            .focus-cards {
                grid-template-columns: 1fr;
            }
            .topic-entry-grid {
                grid-template-columns: 1fr 1fr;
            }
            .schedule-card {
                flex-direction: column;
                gap: 12px;
            }
            .schedule-img {
                width: 100%;
                height: 160px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .footer-legal {
                justify-content: center;
            }
            .bottom-bar {
                padding: 8px 12px;
            }
            .bottom-bar-text {
                font-size: 12px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 12px;
            }
            .page-hero h1 {
                font-size: 26px;
            }
            .page-hero {
                padding: 24px 18px;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .stat-number {
                font-size: 18px;
            }
            .stat-label {
                font-size: 11px;
            }
            .topic-entry-grid {
                grid-template-columns: 1fr;
            }
            .cta-card {
                padding: 28px 20px;
            }
            .cta-card h3 {
                font-size: 20px;
            }
            .card-body {
                padding: 16px 18px 20px;
            }
            .schedule-card {
                padding: 16px;
            }
            .site-footer {
                padding: 32px 16px 24px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #2563EB;
            --primary-light: #3B82F6;
            --primary-bg: #EFF6FF;
            --accent: #F97316;
            --accent-hover: #EA580C;
            --success: #10B981;
            --surface: #FFFFFF;
            --bg: #F8FAFC;
            --text: #0F172A;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --border-light: #F1F5F9;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
            --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.06);
            --shadow-lg: 0 8px 32px rgba(15, 23, 42, 0.08);
            --shadow-hover: 0 12px 40px rgba(37, 99, 235, 0.15);
            --transition: 0.2s ease;
            --font-cn: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
            --font-num: "Roboto", "Segoe UI", "Helvetica Neue", sans-serif;
            --bottom-bar-height: 64px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            font-family: var(--font-cn);
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            padding-bottom: var(--bottom-bar-height);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-light);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            transition: all var(--transition);
        }
        button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        ul,
        ol {
            list-style: none;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .card-base {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-md);
        }
        .section-pad {
            padding-top: 80px;
            padding-bottom: 80px;
        }
        .card-inner {
            padding: 32px;
        }
        .section-title {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.01em;
            color: var(--text);
            margin-bottom: 12px;
        }
        .section-sub {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 28px;
        }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 12px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 500;
            background: var(--primary-bg);
            color: var(--primary);
        }
        .badge-green {
            background: #ECFDF5;
            color: #059669;
        }
        .badge-orange {
            background: #FFF7ED;
            color: #EA580C;
        }
        .num-font {
            font-family: var(--font-num);
            font-variant-numeric: tabular-nums;
        }
        /* Header Navigation */
        .site-header {
            position: sticky;
            top: 16px;
            z-index: 60;
            padding: 0 16px;
        }
        .nav-card {
            background: var(--surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-md);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 20px;
            max-width: 1200px;
            margin: 0 auto;
            transition: box-shadow var(--transition);
        }
        .nav-card:hover {
            box-shadow: var(--shadow-lg);
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: var(--text);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }
        .nav-logo:hover {
            color: var(--primary);
        }
        .nav-logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            flex-shrink: 0;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
        }
        .nav-link-item {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 16px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-link-item:hover {
            background: var(--primary-bg);
            color: var(--primary);
        }
        .nav-link-item.active {
            background: var(--primary-bg);
            color: var(--primary);
            font-weight: 600;
        }
        .nav-link-item i {
            font-size: 14px;
            width: 18px;
            text-align: center;
        }
        .nav-cta {
            background: var(--accent);
            color: #fff;
            padding: 10px 20px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: all var(--transition);
            box-shadow: 0 2px 8px rgba(249, 115, 22, 0.3);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .nav-cta:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(249, 115, 22, 0.4);
        }
        .hamburger {
            display: none;
            font-size: 22px;
            color: var(--text);
            padding: 8px;
            border-radius: 8px;
            transition: background var(--transition);
        }
        .hamburger:hover {
            background: var(--primary-bg);
            color: var(--primary);
        }
        .mobile-menu {
            display: none;
            position: absolute;
            top: calc(100% + 8px);
            left: 16px;
            right: 16px;
            max-width: 1200px;
            margin: 0 auto;
            background: var(--surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-lg);
            padding: 16px;
            flex-direction: column;
            gap: 6px;
            z-index: 70;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu .nav-link-item {
            padding: 14px 16px;
            border-radius: 10px;
        }
        /* Category Hero */
        .category-hero {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border);
            background: var(--surface);
        }
        .category-hero-bg {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            z-index: 0;
        }
        .category-hero-overlay {
            position: relative;
            z-index: 1;
            padding: 64px 40px;
            background: linear-gradient(135deg, rgba(239, 246, 255, 0.92) 0%, rgba(255, 255, 255, 0.88) 100%);
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .category-hero h1 {
            font-size: 42px;
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.02em;
            color: var(--text);
        }
        .category-hero p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 640px;
        }
        /* Category Intro Card */
        .category-intro-card {
            padding: 28px 32px;
        }
        .category-intro-card h3 {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 10px;
            color: var(--text);
        }
        .category-intro-card p {
            color: var(--text-secondary);
            font-size: 16px;
        }
        /* List Grid */
        .list-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 24px;
        }
        .list-card {
            display: flex;
            flex-direction: column;
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: all var(--transition);
        }
        .list-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .list-card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            background: #E2E8F0;
            display: block;
        }
        .list-card-body {
            padding: 20px 22px 22px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            flex: 1;
        }
        .list-card-body h4 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
        }
        .list-card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
        }
        .list-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 12px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        /* Focus Highlights */
        .focus-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 16px;
        }
        .focus-item {
            background: var(--surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            padding: 20px 24px;
            display: flex;
            align-items: flex-start;
            gap: 14px;
            transition: all var(--transition);
        }
        .focus-item:hover {
            border-color: var(--border);
            box-shadow: var(--shadow-sm);
        }
        .focus-item-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--primary-bg);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
        }
        .focus-item-content h5 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 4px;
        }
        .focus-item-content p {
            font-size: 14px;
            color: var(--text-secondary);
        }
        /* Stats Strip */
        .stats-strip {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
            padding: 28px 32px;
        }
        .stat-cell {
            text-align: center;
            padding: 18px 12px;
            border-radius: var(--radius-md);
            background: var(--bg);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .stat-cell:hover {
            background: var(--primary-bg);
            border-color: var(--primary-light);
        }
        .stat-number {
            font-family: var(--font-num);
            font-size: 28px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 6px;
        }
        /* Related Topics */
        .related-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 16px;
        }
        .related-card {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            background: var(--surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .related-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
            transform: translateY(-2px);
        }
        .related-card-left {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .related-card-left i {
            font-size: 22px;
            color: var(--primary);
            width: 36px;
            text-align: center;
        }
        .related-card-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
        }
        .related-card-desc {
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 2px;
        }
        .related-arrow {
            color: var(--text-muted);
            font-size: 16px;
            transition: all var(--transition);
        }
        .related-card:hover .related-arrow {
            color: var(--primary);
            transform: translateX(4px);
        }
        /* FAQ */
        .faq-list details {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            background: var(--surface);
            transition: all var(--transition);
        }
        .faq-list details:hover {
            border-color: var(--border);
        }
        .faq-list summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            list-style: none;
            gap: 20px;
            transition: color var(--transition);
        }
        .faq-list summary::-webkit-details-marker {
            display: none;
        }
        .faq-list summary:hover {
            color: var(--primary);
        }
        .faq-list summary .faq-toggle-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--primary-bg);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            transition: all var(--transition);
        }
        .faq-list details[open] .faq-toggle-icon {
            transform: rotate(180deg);
            background: var(--primary);
            color: #fff;
        }
        .faq-answer {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        /* Bottom CTA */
        .bottom-cta-card {
            background: var(--primary-bg);
            border-radius: var(--radius-lg);
            border: 1px solid #DBEAFE;
            padding: 40px 32px;
            text-align: center;
            box-shadow: var(--shadow-sm);
        }
        .bottom-cta-card h3 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
        }
        .bottom-cta-card p {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 24px;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #fff;
            padding: 14px 32px;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 600;
            transition: all var(--transition);
            box-shadow: 0 4px 16px rgba(249, 115, 22, 0.3);
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(249, 115, 22, 0.4);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--surface);
            color: var(--primary);
            padding: 12px 24px;
            border-radius: 12px;
            font-size: 15px;
            font-weight: 600;
            border: 1px solid var(--primary-light);
            transition: all var(--transition);
        }
        .btn-secondary:hover {
            background: var(--primary-bg);
            border-color: var(--primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }
        /* Footer */
        .site-footer {
            background: #0F172A;
            color: #E2E8F0;
            border-radius: var(--radius-lg);
            max-width: 1200px;
            margin: 80px auto 24px;
            padding: 48px 40px 32px;
            box-shadow: var(--shadow-lg);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand h4 {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-brand h4 i {
            color: var(--primary-light);
        }
        .footer-brand p {
            font-size: 14px;
            color: #94A3B8;
            line-height: 1.8;
            max-width: 420px;
        }
        .footer-col h5 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul li a {
            color: #94A3B8;
            font-size: 14px;
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--primary-light);
        }
        .footer-bottom {
            display: flex;
            flex-direction: column;
            gap: 12px;
            padding-top: 24px;
            border-top: 1px solid #1E293B;
            align-items: flex-start;
        }
        .footer-bottom span {
            font-size: 14px;
            color: #94A3B8;
        }
        .footer-legal {
            display: flex;
            flex-wrap: wrap;
            gap: 8px 16px;
            align-items: center;
            font-size: 14px;
            color: #94A3B8;
        }
        .footer-legal a {
            color: #94A3B8;
            transition: color var(--transition);
        }
        .footer-legal a:hover {
            color: var(--primary-light);
        }
        /* Fixed bottom bar */
        .fixed-cta-bar {
            position: fixed;
            bottom: 12px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 50;
            width: calc(100% - 32px);
            max-width: 680px;
            background: var(--surface);
            border-radius: 999px;
            border: 1px solid var(--border);
            box-shadow: 0 8px 32px rgba(15, 23, 42, 0.12);
            padding: 10px 10px 10px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
        }
        .fixed-cta-bar p {
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: 500;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .fixed-cta-btn {
            background: var(--accent);
            color: #fff;
            padding: 10px 20px;
            border-radius: 999px;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: all var(--transition);
            box-shadow: 0 2px 8px rgba(249, 115, 22, 0.3);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .fixed-cta-btn:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(249, 115, 22, 0.4);
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .category-hero-overlay {
                padding: 48px 32px;
            }
            .category-hero h1 {
                font-size: 36px;
            }
            .list-grid {
                grid-template-columns: 1fr 1fr;
            }
            .stats-strip {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .hamburger {
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .category-hero-overlay {
                padding: 36px 24px;
            }
            .category-hero h1 {
                font-size: 32px;
            }
            .category-hero p {
                font-size: 15px;
            }
            .list-grid {
                grid-template-columns: 1fr;
            }
            .stats-strip {
                grid-template-columns: 1fr 1fr;
                padding: 20px;
            }
            .stat-number {
                font-size: 24px;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .site-footer {
                padding: 32px 24px 24px;
                margin-top: 48px;
            }
            .fixed-cta-bar {
                padding: 8px 8px 8px 16px;
            }
            .fixed-cta-bar p {
                font-size: 12px;
            }
            .fixed-cta-btn {
                padding: 8px 16px;
                font-size: 13px;
            }
            .section-pad {
                padding-top: 48px;
                padding-bottom: 48px;
            }
            .card-inner {
                padding: 20px;
            }
            .section-title {
                font-size: 26px;
            }
            .focus-item {
                padding: 16px 18px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 12px;
            }
            .category-hero-overlay {
                padding: 28px 20px;
            }
            .category-hero h1 {
                font-size: 28px;
            }
            .list-card-body {
                padding: 16px 18px 18px;
            }
            .focus-grid {
                gap: 12px;
            }
            .stats-strip {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
                padding: 16px;
            }
            .stat-number {
                font-size: 20px;
            }
            .stat-label {
                font-size: 12px;
            }
            .related-card {
                padding: 16px 18px;
            }
            .faq-list summary {
                padding: 16px 18px;
                font-size: 15px;
            }
            .faq-answer {
                padding: 0 18px 16px;
                font-size: 14px;
            }
            .bottom-cta-card {
                padding: 28px 20px;
            }
            .bottom-cta-card h3 {
                font-size: 22px;
            }
            .bottom-cta-card p {
                font-size: 14px;
            }
            .btn-primary {
                padding: 12px 24px;
                font-size: 15px;
            }
            .fixed-cta-bar {
                width: calc(100% - 16px);
                border-radius: 999px;
                padding: 8px 8px 8px 14px;
            }
            .fixed-cta-bar p {
                font-size: 11px;
            }
            .fixed-cta-btn {
                padding: 7px 14px;
                font-size: 12px;
            }
            .section-title {
                font-size: 24px;
            }
        }
        @media (max-width: 375px) {
            .category-hero h1 {
                font-size: 24px;
            }
            .category-hero-overlay {
                padding: 24px 16px;
            }
            .list-card-img {
                aspect-ratio: 16 / 10;
            }
            .stats-strip {
                grid-template-columns: 1fr;
            }
            .related-card {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .related-card .related-arrow {
                display: none;
            }
            .fixed-cta-bar {
                flex-direction: column;
                align-items: stretch;
                text-align: center;
                border-radius: 16px;
                padding: 12px;
            }
            .fixed-cta-bar p {
                white-space: normal;
                text-align: center;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #2563EB;
            --primary-light: #3B82F6;
            --primary-bg: #EFF6FF;
            --accent: #F97316;
            --accent-hover: #EA580C;
            --success: #10B981;
            --surface: #FFFFFF;
            --bg: #F8FAFC;
            --text: #0F172A;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --border-light: #F1F5F9;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
            --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.06);
            --shadow-lg: 0 8px 32px rgba(15, 23, 42, 0.08);
            --shadow-hover: 0 12px 40px rgba(37, 99, 235, 0.15);
            --transition: 0.2s ease;
            --font-cn: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
            --font-num: "Roboto", "Segoe UI", "Helvetica Neue", sans-serif;
            --bottom-bar-height: 64px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-cn);
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            padding-bottom: var(--bottom-bar-height);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-light);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            transition: all var(--transition);
        }
        button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .card-base {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-md);
        }
        .section-pad {
            padding-top: 56px;
            padding-bottom: 56px;
        }
        .card-inner {
            padding: 32px;
        }
        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.01em;
            margin-bottom: 12px;
        }
        .section-subtitle {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 680px;
            margin-bottom: 28px;
        }
        .num-font {
            font-family: var(--font-num);
            font-variant-numeric: tabular-nums;
        }

        /* Header Navigation */
        .site-header {
            position: sticky;
            top: 16px;
            z-index: 60;
            padding: 0 16px;
        }
        .nav-card {
            background: var(--surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-md);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 20px;
            max-width: 1200px;
            margin: 0 auto;
            transition: box-shadow var(--transition);
        }
        .nav-card:hover {
            box-shadow: var(--shadow-lg);
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: var(--text);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }
        .nav-logo:hover {
            color: var(--primary);
        }
        .nav-logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
        }
        .nav-link-item {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 16px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-link-item:hover {
            background: var(--primary-bg);
            color: var(--primary);
        }
        .nav-link-item.active {
            background: var(--primary-bg);
            color: var(--primary);
            font-weight: 600;
        }
        .nav-link-item i {
            font-size: 14px;
            width: 18px;
            text-align: center;
        }
        .nav-cta {
            background: var(--accent);
            color: #fff;
            padding: 10px 20px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: all var(--transition);
            box-shadow: 0 2px 8px rgba(249, 115, 22, 0.3);
        }
        .nav-cta:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(249, 115, 22, 0.4);
        }
        .hamburger {
            display: none;
            font-size: 22px;
            color: var(--text);
            padding: 8px;
            border-radius: 8px;
            transition: background var(--transition);
        }
        .hamburger:hover {
            background: var(--bg);
        }
        .mobile-menu {
            display: none;
            position: absolute;
            top: 70px;
            left: 16px;
            right: 16px;
            background: var(--surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-lg);
            padding: 10px;
            z-index: 70;
            flex-direction: column;
            gap: 4px;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu .nav-link-item {
            padding: 12px 16px;
            border-radius: 8px;
        }

        /* H1 / Category Hero */
        .category-hero {
            padding-top: 40px;
            padding-bottom: 0;
        }
        .category-hero-card {
            background: linear-gradient(135deg, #FFFFFF 0%, #F0F6FF 100%);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-md);
            padding: 40px 36px;
            position: relative;
            overflow: hidden;
        }
        .category-hero-card::after {
            content: "";
            position: absolute;
            top: -40px;
            right: -40px;
            width: 220px;
            height: 220px;
            background: radial-gradient(circle, rgba(37, 99, 235, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .category-hero-card h1 {
            font-size: 36px;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--text);
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
        }
        .category-hero-card .hero-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 720px;
            position: relative;
            z-index: 1;
            line-height: 1.8;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--success);
            color: #fff;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
        }
        .hero-badge i {
            font-size: 10px;
        }

        /* Featured / Info Cards */
        .info-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-md);
            padding: 28px;
            transition: box-shadow var(--transition), transform var(--transition);
        }
        .info-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .info-card h2 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }
        .info-card p {
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.8;
        }

        /* List Cards Grid */
        .list-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: box-shadow var(--transition), transform var(--transition);
            display: flex;
            flex-direction: column;
        }
        .list-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .list-card-image {
            aspect-ratio: 16/9;
            background: #E2E8F0;
            overflow: hidden;
            position: relative;
        }
        .list-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .list-card-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .list-card-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
            line-height: 1.5;
        }
        .list-card-summary {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            flex: 1;
        }
        .list-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 14px;
            font-size: 12px;
            color: var(--text-muted);
            padding-top: 12px;
            border-top: 1px solid var(--border-light);
        }
        .list-card-meta .tag {
            background: var(--primary-bg);
            color: var(--primary);
            padding: 2px 10px;
            border-radius: 12px;
            font-weight: 500;
            font-size: 11px;
        }
        .list-card-meta .date-tag {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        /* Focus Cards */
        .focus-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-md);
            padding: 20px;
            display: flex;
            flex-direction: column;
            transition: box-shadow var(--transition), transform var(--transition);
        }
        .focus-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .focus-card-image {
            aspect-ratio: 16/9;
            background: #E2E8F0;
            border-radius: var(--radius-md);
            overflow: hidden;
            margin-bottom: 14px;
        }
        .focus-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .focus-card h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
            line-height: 1.5;
        }
        .focus-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
        }
        .focus-card .focus-link {
            font-size: 13px;
            color: var(--primary);
            font-weight: 500;
            margin-top: 10px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .focus-card .focus-link:hover {
            color: var(--primary-light);
        }

        /* Stats Row */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .stat-mini-card {
            background: var(--surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            padding: 20px;
            text-align: center;
        }
        .stat-mini-card .stat-num {
            font-size: 28px;
            font-weight: 700;
            color: var(--primary);
            font-family: var(--font-num);
            letter-spacing: -0.02em;
            margin-bottom: 4px;
        }
        .stat-mini-card .stat-label {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* Topic Entry Cards */
        .topic-card {
            background: var(--surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            padding: 22px;
            text-align: center;
            transition: all var(--transition);
            display: block;
        }
        .topic-card:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
            color: var(--text);
        }
        .topic-card .topic-icon {
            width: 44px;
            height: 44px;
            background: var(--primary-bg);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 10px;
            color: var(--primary);
            font-size: 18px;
        }
        .topic-card h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 4px;
        }
        .topic-card p {
            font-size: 12px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* FAQ */
        .faq-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-md);
            padding: 32px;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 16px 0;
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            list-style: none;
            padding-right: 8px;
            transition: color var(--transition);
        }
        .faq-item summary:hover {
            color: var(--primary);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary .faq-icon {
            color: var(--text-muted);
            font-size: 14px;
            transition: transform var(--transition);
        }
        .faq-item[open] summary .faq-icon {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            padding: 12px 8px 0;
        }

        /* Bottom CTA */
        .bottom-cta-card {
            background: linear-gradient(135deg, var(--primary-bg) 0%, #E8F0FE 100%);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            padding: 36px 32px;
            text-align: center;
        }
        .bottom-cta-card h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }
        .bottom-cta-card p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 20px;
        }
        .btn-primary-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--accent);
            color: #fff;
            padding: 12px 28px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            transition: all var(--transition);
            box-shadow: 0 4px 14px rgba(249, 115, 22, 0.35);
        }
        .btn-primary-cta:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(249, 115, 22, 0.45);
        }
        .btn-secondary-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--surface);
            color: var(--primary);
            padding: 12px 24px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .btn-secondary-cta:hover {
            background: var(--primary-bg);
            border-color: var(--primary-light);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        /* Footer */
        .site-footer {
            background: #0F172A;
            border-radius: var(--radius-lg);
            margin: 60px 16px 0;
            padding: 36px 28px 28px;
            color: #E2E8F0;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 28px;
        }
        .footer-brand h4 {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-brand p {
            font-size: 13px;
            line-height: 1.8;
            color: #94A3B8;
            max-width: 480px;
        }
        .footer-col h5 {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 13px;
            color: #94A3B8;
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding-top: 20px;
            border-top: 1px solid #1E293B;
            font-size: 12px;
            color: #64748B;
        }
        .footer-legal {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
        }
        .footer-legal a {
            color: #94A3B8;
        }
        .footer-legal a:hover {
            color: #fff;
        }

        /* Fixed Bottom Conversion Bar */
        .bottom-fixed-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 50;
            background: var(--surface);
            border-top: 1px solid var(--border);
            box-shadow: 0 -2px 12px rgba(15, 23, 42, 0.06);
            padding: 10px 16px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            max-width: 100%;
        }
        .bottom-fixed-bar .bar-text {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .bottom-fixed-bar .bar-cta {
            background: var(--accent);
            color: #fff;
            padding: 10px 20px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: all var(--transition);
            box-shadow: 0 2px 8px rgba(249, 115, 22, 0.3);
        }
        .bottom-fixed-bar .bar-cta:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 18px rgba(249, 115, 22, 0.4);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .section-pad {
                padding-top: 40px;
                padding-bottom: 40px;
            }
            .card-inner {
                padding: 20px;
            }
            .category-hero-card {
                padding: 28px 22px;
            }
            .category-hero-card h1 {
                font-size: 28px;
            }
            .section-title {
                font-size: 22px;
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
            .stat-mini-card .stat-num {
                font-size: 22px;
            }
            .faq-card {
                padding: 20px;
            }
            .bottom-cta-card {
                padding: 24px 18px;
            }
            .bottom-fixed-bar {
                flex-direction: column;
                text-align: center;
                padding: 10px 12px;
            }
            .bottom-fixed-bar .bar-text {
                white-space: normal;
                font-size: 13px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 14px;
            }
            .category-hero-card h1 {
                font-size: 24px;
            }
            .hero-desc {
                font-size: 14px;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .stat-mini-card {
                padding: 14px 10px;
            }
            .stat-mini-card .stat-num {
                font-size: 18px;
            }
            .stat-mini-card .stat-label {
                font-size: 11px;
            }
            .list-card-title {
                font-size: 15px;
            }
            .faq-item summary {
                font-size: 14px;
            }
            .faq-item p {
                font-size: 13px;
            }
            .bottom-fixed-bar .bar-cta {
                padding: 8px 16px;
                font-size: 13px;
            }
        }

/* roulang page: category4 */
:root {
            --primary: #2563EB;
            --primary-light: #3B82F6;
            --primary-bg: #EFF6FF;
            --accent: #F97316;
            --accent-hover: #EA580C;
            --success: #10B981;
            --surface: #FFFFFF;
            --bg: #F8FAFC;
            --text: #0F172A;
            --text-secondary: #475569;
            --text-muted: #94A3B8;
            --border: #E2E8F0;
            --border-light: #F1F5F9;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
            --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.06);
            --shadow-lg: 0 8px 32px rgba(15, 23, 42, 0.08);
            --shadow-hover: 0 12px 40px rgba(37, 99, 235, 0.15);
            --transition: 0.2s ease;
            --font-cn: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
            --font-num: "Roboto", "Segoe UI", "Helvetica Neue", sans-serif;
            --bottom-bar-height: 64px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-cn);
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            padding-bottom: var(--bottom-bar-height);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-light);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            transition: all var(--transition);
        }
        button:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .card-base {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-md);
        }
        .section-pad {
            padding-top: 80px;
            padding-bottom: 80px;
        }
        .card-inner {
            padding: 32px;
        }

        /* Header Navigation */
        .site-header {
            position: sticky;
            top: 16px;
            z-index: 60;
            padding: 0 16px;
        }
        .nav-card {
            background: var(--surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-md);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 20px;
            max-width: 1200px;
            margin: 0 auto;
            transition: box-shadow var(--transition);
        }
        .nav-card:hover {
            box-shadow: var(--shadow-lg);
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 20px;
            color: var(--text);
            letter-spacing: -0.01em;
            white-space: nowrap;
        }
        .nav-logo:hover {
            color: var(--primary);
        }
        .nav-logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
        }
        .nav-link-item {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 16px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-link-item:hover {
            background: var(--primary-bg);
            color: var(--primary);
        }
        .nav-link-item.active {
            background: var(--primary-bg);
            color: var(--primary);
            font-weight: 600;
        }
        .nav-link-item i {
            font-size: 14px;
            width: 18px;
            text-align: center;
        }
        .nav-cta {
            background: var(--accent);
            color: #fff;
            padding: 10px 20px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            white-space: nowrap;
            transition: all var(--transition);
            box-shadow: 0 2px 8px rgba(249, 115, 22, 0.3);
        }
        .nav-cta:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(249, 115, 22, 0.4);
        }
        .hamburger {
            display: none;
            font-size: 22px;
            color: var(--text);
            padding: 8px;
            border-radius: 8px;
            transition: background var(--transition);
        }
        .hamburger:hover {
            background: var(--border-light);
        }
        .mobile-menu {
            display: none;
            position: absolute;
            top: 100%;
            left: 16px;
            right: 16px;
            margin-top: 8px;
            background: var(--surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-lg);
            padding: 12px;
            flex-direction: column;
            gap: 4px;
            z-index: 70;
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu .nav-link-item {
            padding: 12px 16px;
            border-radius: 8px;
            font-size: 15px;
        }

        /* Section Common */
        .section-title {
            font-size: 30px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.01em;
            line-height: 1.3;
            margin-bottom: 12px;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 28px;
        }
        .h3-title {
            font-size: 20px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
            margin-bottom: 8px;
        }
        .tag-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 12px;
            border-radius: 9999px;
            font-size: 13px;
            font-weight: 500;
            background: var(--primary-bg);
            color: var(--primary);
        }
        .tag-badge.success {
            background: #ECFDF5;
            color: #059669;
        }
        .tag-badge.accent {
            background: #FFF7ED;
            color: #EA580C;
        }
        .stat-number {
            font-family: var(--font-num);
            font-weight: 700;
            font-size: 32px;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 4px;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #fff;
            padding: 12px 24px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            transition: all var(--transition);
            box-shadow: 0 2px 8px rgba(249, 115, 22, 0.3);
            text-decoration: none;
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(249, 115, 22, 0.4);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary-bg);
            color: var(--primary);
            padding: 12px 24px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 600;
            transition: all var(--transition);
            text-decoration: none;
        }
        .btn-secondary:hover {
            background: #DBEAFE;
            color: var(--primary);
            transform: translateY(-2px);
        }
        .image-placeholder {
            width: 100%;
            aspect-ratio: 16/9;
            background-color: #E2E8F0;
            border-radius: var(--radius-md);
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 28px;
            position: relative;
        }
        .image-placeholder img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .image-placeholder .fa-image {
            position: absolute;
            color: rgba(15, 23, 42, 0.15);
            font-size: 40px;
        }

        /* Category H1 Section */
        .cat-h1-section {
            padding-top: 48px;
            padding-bottom: 24px;
        }
        .cat-h1-card {
            padding: 36px 32px;
            position: relative;
            overflow: hidden;
        }
        .cat-h1-card::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle at top right, rgba(37, 99, 235, 0.06), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cat-h1-title {
            font-size: 36px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: -0.02em;
            line-height: 1.25;
            margin-bottom: 12px;
        }
        .cat-h1-desc {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 700px;
        }

        /* List Grid */
        .list-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .list-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: all var(--transition);
        }
        .list-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .list-card-image {
            aspect-ratio: 16/9;
            background-color: #E2E8F0;
            overflow: hidden;
            position: relative;
        }
        .list-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .list-card-body {
            padding: 20px;
        }
        .list-card-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
            margin-bottom: 8px;
        }
        .list-card-summary {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 12px;
        }
        .list-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }
        .list-card-meta i {
            font-size: 12px;
        }

        /* Focus Cards */
        .focus-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .focus-card {
            background: var(--surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
        }
        .focus-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .focus-card-image {
            aspect-ratio: 4/3;
            background-color: #E2E8F0;
            overflow: hidden;
        }
        .focus-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .focus-card-body {
            padding: 16px;
        }
        .focus-card-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
            margin-bottom: 4px;
        }
        .focus-card-meta {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* Stats Strip */
        .stats-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .stat-block {
            text-align: center;
            padding: 20px 16px;
            background: var(--bg);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
        }

        /* Topic Entry */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }
        .topic-card {
            background: var(--primary-bg);
            border-radius: var(--radius-md);
            border: 1px solid #DBEAFE;
            padding: 20px;
            text-align: center;
            transition: all var(--transition);
            text-decoration: none;
            color: var(--text);
            display: block;
        }
        .topic-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            color: var(--text);
        }
        .topic-card-icon {
            width: 44px;
            height: 44px;
            background: var(--surface);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 10px;
            color: var(--primary);
            font-size: 18px;
            box-shadow: var(--shadow-sm);
        }
        .topic-card-title {
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
        }
        .topic-card-desc {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        /* FAQ */
        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 16px 0;
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            cursor: pointer;
            font-weight: 600;
            font-size: 15px;
            color: var(--text);
            padding: 4px 0;
            transition: color var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question .fa-chevron-down {
            font-size: 14px;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-question.active .fa-chevron-down {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .faq-answer-inner {
            padding-top: 8px;
        }
        .faq-answer.open {
            max-height: 300px;
        }

        /* CTA Card */
        .cta-card {
            background: var(--primary-bg);
            border-radius: var(--radius-lg);
            border: 1px solid #DBEAFE;
            padding: 32px;
            text-align: center;
        }
        .cta-card h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }
        .cta-card p {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 20px;
        }

        /* Bottom Fixed Bar */
        .bottom-fixed-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 50;
            background: var(--surface);
            border-top: 1px solid var(--border);
            box-shadow: 0 -4px 20px rgba(15, 23, 42, 0.08);
            padding: 12px 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            min-height: var(--bottom-bar-height);
        }
        .bottom-fixed-bar p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .bottom-fixed-bar .btn-primary {
            padding: 10px 20px;
            font-size: 13px;
            white-space: nowrap;
        }

        /* Footer */
        .site-footer {
            background: #0F172A;
            color: #CBD5E1;
            margin-top: 0;
            padding: 48px 0 24px;
        }
        .footer-grid {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 32px;
        }
        .footer-brand h4 {
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-brand p {
            font-size: 13px;
            line-height: 1.7;
            color: #94A3B8;
            max-width: 320px;
        }
        .footer-col h5 {
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 12px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col li {
            margin-bottom: 8px;
        }
        .footer-col a {
            color: #94A3B8;
            font-size: 13px;
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: #fff;
        }
        .footer-bottom {
            max-width: 1200px;
            margin: 32px auto 0;
            padding: 16px 24px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 12px;
            color: #64748B;
        }
        .footer-legal {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 12px;
        }
        .footer-legal a {
            color: #64748B;
            font-size: 12px;
        }
        .footer-legal a:hover {
            color: #CBD5E1;
        }
        .footer-legal span {
            color: #64748B;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .list-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .focus-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 16px;
            }
            .stats-strip {
                grid-template-columns: repeat(4, 1fr);
                gap: 12px;
            }
            .topic-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 12px;
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .container {
                padding: 0 16px;
            }
            .section-pad {
                padding-top: 48px;
                padding-bottom: 48px;
            }
            .card-inner {
                padding: 20px;
            }
            .cat-h1-title {
                font-size: 28px;
            }
            .cat-h1-card {
                padding: 24px 20px;
            }
            .list-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .focus-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .stats-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .topic-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .section-title {
                font-size: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .bottom-fixed-bar {
                padding: 10px 16px;
                gap: 10px;
            }
            .bottom-fixed-bar p {
                font-size: 12px;
            }
            .bottom-fixed-bar .btn-primary {
                padding: 8px 16px;
                font-size: 12px;
            }
            .stat-number {
                font-size: 26px;
            }
        }
        @media (max-width: 520px) {
            .stats-strip {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .stat-block {
                padding: 14px 10px;
            }
            .stat-number {
                font-size: 22px;
            }
            .cat-h1-title {
                font-size: 24px;
            }
            .list-card-title {
                font-size: 16px;
            }
            .focus-card-title {
                font-size: 14px;
            }
        }
        @media (max-width: 375px) {
            .container {
                padding: 0 12px;
            }
            .section-pad {
                padding-top: 36px;
                padding-bottom: 36px;
            }
            .card-inner {
                padding: 16px;
            }
            .cat-h1-card {
                padding: 20px 16px;
            }
            .cat-h1-title {
                font-size: 22px;
            }
            .list-card-body {
                padding: 16px;
            }
            .bottom-fixed-bar {
                flex-direction: column;
                gap: 6px;
                padding: 8px 12px;
                text-align: center;
            }
            .bottom-fixed-bar p {
                font-size: 11px;
                white-space: normal;
            }
        }