/* roulang page: index */
:root {
            --primary-neon-cyan: #00E5FF;
            --primary-electric-orange: #FF5E00;
            --bg-deep-space: #0D1117;
            --bg-card-dark: #1C2333;
            --bg-card-hover: #252D3F;
            --text-primary: #FFFFFF;
            --text-secondary: #B0B8C4;
            --text-hint: #6E7681;
            --border-subtle: #2A2E38;
            --radius-data: 4px;
            --radius-brand: 12px;
            --radius-btn: 8px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
            --shadow-hover: 0 8px 32px rgba(0, 229, 255, 0.2);
            --font-h1: 600 42px/1.2 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-h2: 600 28px/1.3 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-h3: 500 18px/1.4 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-body: 400 15px/1.75 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-data: 400 16px 'SF Mono', 'Fira Code', 'Courier New', monospace;
            --spacing-section: 120px;
            --spacing-mobile-section: 64px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font: var(--font-body);
            background-color: var(--bg-deep-space);
            color: var(--text-primary);
            line-height: 1.75;
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: var(--primary-neon-cyan);
        }
        a:focus-visible {
            outline: 2px solid var(--primary-neon-cyan);
            outline-offset: 2px;
            border-radius: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }
        button:focus-visible {
            outline: 2px solid var(--primary-neon-cyan);
            outline-offset: 2px;
            border-radius: var(--radius-btn);
        }
        input {
            font-family: inherit;
        }
        input:focus-visible {
            outline: 2px solid var(--primary-neon-cyan);
            outline-offset: 2px;
        }

        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* 导航系统 */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--bg-deep-space);
            border-bottom: 1px solid var(--border-subtle);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }
        .brand-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 24px;
            gap: 20px;
            border-bottom: 1px solid rgba(42, 46, 56, 0.5);
        }
        @media (max-width: 768px) {
            .brand-row {
                padding: 10px 16px;
            }
        }
        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: var(--primary-neon-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }
        .logo-icon::before {
            content: '';
            position: absolute;
            width: 18px;
            height: 2px;
            background: var(--bg-deep-space);
            border-radius: 1px;
            animation: logoPulse 2s ease-in-out infinite;
        }
        .logo-icon::after {
            content: '';
            position: absolute;
            width: 6px;
            height: 6px;
            background: var(--bg-deep-space);
            border-radius: 50%;
            top: 8px;
            right: 8px;
        }
        @keyframes logoPulse {
            0%,
            100% {
                transform: scaleX(1);
                opacity: 0.9;
            }
            50% {
                transform: scaleX(1.6);
                opacity: 1;
            }
        }
        .logo-text {
            font-weight: 700;
            font-size: 20px;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .logo-text span {
            color: var(--primary-neon-cyan);
        }
        .brand-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }
        .btn-subscribe-sm {
            background: var(--primary-neon-cyan);
            color: var(--bg-deep-space);
            padding: 8px 16px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 13px;
            transition: all 0.2s ease;
            white-space: nowrap;
        }
        .btn-subscribe-sm:hover {
            background: #00C8E0;
            transform: scale(0.98);
            color: var(--bg-deep-space);
        }
        .btn-subscribe-sm:active {
            transform: scale(0.96);
        }

        /* 频道行 */
        .channel-row {
            display: flex;
            align-items: center;
            gap: 4px;
            padding: 0 24px;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        .channel-row::-webkit-scrollbar {
            display: none;
        }
        @media (max-width: 768px) {
            .channel-row {
                padding: 0 8px;
                gap: 2px;
            }
        }
        .channel-tag {
            display: inline-block;
            padding: 14px 18px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            position: relative;
            transition: color 0.2s ease;
            border-bottom: 3px solid transparent;
            margin-bottom: -1px;
            cursor: pointer;
        }
        .channel-tag:hover {
            color: var(--primary-neon-cyan);
        }
        .channel-tag.active {
            color: var(--primary-neon-cyan);
            border-bottom-color: var(--primary-neon-cyan);
            font-weight: 600;
        }
        @media (max-width: 768px) {
            .channel-tag {
                padding: 12px 12px;
                font-size: 13px;
            }
        }

        /* 汉堡菜单按钮 */
        .hamburger-btn {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            cursor: pointer;
            z-index: 1001;
            background: none;
            border: none;
        }
        .hamburger-btn span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        .hamburger-btn.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger-btn.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger-btn.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }
        @media (max-width: 768px) {
            .hamburger-btn {
                display: flex;
            }
            .channel-row {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--bg-deep-space);
                border-bottom: 2px solid var(--border-subtle);
                padding: 8px 16px 16px;
                gap: 2px;
                z-index: 999;
            }
            .channel-row.open {
                display: flex;
            }
            .channel-tag {
                border-bottom: none;
                border-left: 3px solid transparent;
                padding: 12px 16px;
                margin-bottom: 0;
                border-radius: 6px;
            }
            .channel-tag.active {
                border-bottom: none;
                border-left-color: var(--primary-neon-cyan);
                background: rgba(0, 229, 255, 0.06);
            }
        }

        /* 公告条 */
        .alert-bar {
            background: rgba(255, 94, 0, 0.12);
            border-bottom: 1px solid rgba(255, 94, 0, 0.25);
            padding: 10px 24px;
            font-size: 13px;
            color: var(--primary-electric-orange);
            text-align: center;
            letter-spacing: 0.3px;
            animation: alertGlow 3s ease-in-out infinite;
        }
        @keyframes alertGlow {
            0%,
            100% {
                background: rgba(255, 94, 0, 0.08);
            }
            50% {
                background: rgba(255, 94, 0, 0.16);
            }
        }
        .alert-dot {
            display: inline-block;
            width: 7px;
            height: 7px;
            background: var(--primary-electric-orange);
            border-radius: 50%;
            margin-right: 6px;
            animation: pulseDot 1.2s ease-in-out infinite;
        }
        @keyframes pulseDot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(255, 94, 0, 0.6);
            }
            50% {
                box-shadow: 0 0 0 8px rgba(255, 94, 0, 0);
            }
        }

        /* Hero数据风暴区 */
        .hero-data-storm {
            position: relative;
            padding: 48px 0 56px;
            background: linear-gradient(180deg, #0D1117 0%, #11161F 40%, #161B22 100%);
            overflow: hidden;
        }
        .hero-data-storm::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(rgba(0, 229, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 229, 255, 0.03) 1px, transparent 1px);
            background-size: 40px 40px;
            pointer-events: none;
            z-index: 0;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 28px;
            position: relative;
            z-index: 1;
        }
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        .hero-left {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .hero-h1 {
            font: var(--font-h1);
            color: var(--text-primary);
            letter-spacing: 0.5px;
            margin: 0;
        }
        .hero-h1 .accent {
            color: var(--primary-neon-cyan);
        }
        .hero-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }
        .live-score-scroll {
            background: var(--bg-card-dark);
            border-radius: var(--radius-brand);
            border: 1px solid var(--border-subtle);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .live-score-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 20px;
            border-bottom: 1px solid var(--border-subtle);
            background: rgba(0, 229, 255, 0.04);
        }
        .live-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 700;
            color: var(--primary-electric-orange);
            animation: liveBlink 1.6s ease-in-out infinite;
        }
        @keyframes liveBlink {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.45;
            }
        }
        .live-badge-dot {
            width: 8px;
            height: 8px;
            background: var(--primary-electric-orange);
            border-radius: 50%;
            animation: pulseDot 1.2s ease-in-out infinite;
        }
        .score-table {
            width: 100%;
            border-collapse: collapse;
        }
        .score-table tr {
            border-bottom: 1px solid rgba(42, 46, 56, 0.5);
            transition: background 0.2s ease;
        }
        .score-table tr:hover {
            background: var(--bg-card-hover);
        }
        .score-table td {
            padding: 13px 16px;
            font-size: 14px;
            vertical-align: middle;
            white-space: nowrap;
        }
        .score-table .team-name {
            color: var(--text-primary);
            font-weight: 500;
            min-width: 80px;
        }
        .score-table .score-num {
            font: var(--font-data);
            font-size: 22px;
            font-weight: 700;
            color: var(--primary-neon-cyan);
            text-align: center;
            letter-spacing: 2px;
        }
        .score-table .score-vs {
            color: var(--text-hint);
            font-size: 13px;
            text-align: center;
        }
        .score-table .trend-arrow {
            font-size: 13px;
            margin-left: 2px;
        }
        .trend-up {
            color: #00E5A0;
        }
        .trend-down {
            color: #FF5E5E;
        }
        .score-table .match-time {
            font-size: 12px;
            color: var(--text-hint);
            text-align: right;
        }
        @media (max-width: 768px) {
            .score-table td {
                padding: 10px 8px;
                font-size: 12px;
            }
            .score-table .score-num {
                font-size: 17px;
            }
            .score-table .team-name {
                min-width: 55px;
                font-size: 12px;
            }
        }

        .hero-right {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .hero-quick-entry {
            display: block;
            background: var(--bg-card-dark);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-brand);
            padding: 16px 18px;
            color: var(--text-primary);
            font-weight: 500;
            font-size: 15px;
            transition: all 0.25s ease;
            text-align: center;
            cursor: pointer;
        }
        .hero-quick-entry:hover {
            border-color: var(--primary-neon-cyan);
            box-shadow: var(--shadow-hover);
            color: var(--primary-neon-cyan);
            transform: translateY(-2px);
        }
        .hero-quick-entry .entry-icon {
            display: block;
            font-size: 28px;
            margin-bottom: 6px;
            color: var(--primary-neon-cyan);
        }

        /* 板块通用间距 */
        .section {
            padding: var(--spacing-section) 0;
        }
        @media (max-width: 768px) {
            .section {
                padding: var(--spacing-mobile-section) 0;
            }
            .hero-data-storm {
                padding: 32px 0 40px;
            }
            .hero-h1 {
                font-size: 28px;
                line-height: 1.25;
            }
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font: var(--font-h2);
            color: var(--text-primary);
            margin: 0 0 12px;
            letter-spacing: 0.3px;
        }
        .section-header p {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0 auto;
            line-height: 1.7;
        }

        /* 痛点横幅 */
        .pain-banner {
            background: rgba(255, 94, 0, 0.06);
            border-top: 1px solid rgba(255, 94, 0, 0.2);
            border-bottom: 1px solid rgba(255, 94, 0, 0.2);
            padding: 28px 0;
            text-align: center;
        }
        .pain-banner p {
            font-size: 15px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.7;
        }
        .pain-banner strong {
            color: var(--primary-electric-orange);
        }

        /* 卡片网格 */
        .card-grid {
            display: grid;
            gap: 20px;
        }
        .card-grid.cols-3 {
            grid-template-columns: repeat(3, 1fr);
        }
        .card-grid.cols-4 {
            grid-template-columns: repeat(4, 1fr);
        }
        .card-grid.cols-2 {
            grid-template-columns: repeat(2, 1fr);
        }
        @media (max-width: 1024px) {
            .card-grid.cols-3,
            .card-grid.cols-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .card-grid.cols-2,
            .card-grid.cols-3,
            .card-grid.cols-4 {
                grid-template-columns: 1fr;
            }
        }

        /* 品牌服务卡片 */
        .brand-card {
            background: var(--bg-card-dark);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-brand);
            padding: 28px 24px;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-card);
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }
        .brand-card:hover {
            border-color: var(--primary-neon-cyan);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
            background: var(--bg-card-hover);
        }
        .brand-card .card-icon {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            background: rgba(0, 229, 255, 0.1);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary-neon-cyan);
        }
        .brand-card .card-body h3 {
            font: var(--font-h3);
            color: var(--text-primary);
            margin: 0 0 6px;
        }
        .brand-card .card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.65;
        }

        /* 数据指标卡片 */
        .metric-card {
            background: var(--bg-card-dark);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-data);
            padding: 20px 18px;
            text-align: center;
            transition: all 0.25s ease;
        }
        .metric-card:hover {
            border-color: var(--primary-neon-cyan);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.1);
        }
        .metric-value {
            font: var(--font-data);
            font-size: 32px;
            font-weight: 700;
            color: var(--primary-neon-cyan);
            letter-spacing: 1px;
        }
        .metric-label {
            font-size: 13px;
            color: var(--text-secondary);
            margin-top: 4px;
        }
        .metric-trend {
            font-size: 12px;
            margin-top: 6px;
            font-weight: 500;
        }

        /* 资讯卡片 */
        .news-card {
            display: flex;
            gap: 14px;
            padding: 16px;
            background: var(--bg-card-dark);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-brand);
            transition: all 0.25s ease;
            cursor: pointer;
        }
        .news-card:hover {
            border-color: var(--primary-neon-cyan);
            background: var(--bg-card-hover);
            box-shadow: var(--shadow-hover);
        }
        .news-card .news-thumb {
            flex-shrink: 0;
            width: 72px;
            height: 72px;
            border-radius: 6px;
            object-fit: cover;
            background: #1a1f2b;
        }
        .news-card .news-body h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 4px;
            line-height: 1.4;
        }
        .news-card .news-body .news-date {
            font-size: 12px;
            color: var(--primary-neon-cyan);
            margin-bottom: 4px;
        }
        .news-card .news-body p {
            font-size: 13px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        @media (max-width: 640px) {
            .news-card {
                flex-direction: column;
            }
            .news-card .news-thumb {
                width: 100%;
                height: 140px;
            }
        }

        /* 专题卡片 */
        .topic-card {
            position: relative;
            border-radius: var(--radius-brand);
            overflow: hidden;
            background: var(--bg-card-dark);
            border: 1px solid var(--border-subtle);
            transition: all 0.3s ease;
            cursor: pointer;
            display: block;
        }
        .topic-card:hover {
            border-color: var(--primary-neon-cyan);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .topic-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            display: block;
        }
        .topic-card .topic-info {
            padding: 16px 18px;
        }
        .topic-card .topic-info h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 6px;
        }
        .topic-card .topic-info p {
            font-size: 13px;
            color: var(--text-secondary);
            margin: 0 0 10px;
            line-height: 1.5;
        }
        .topic-tag {
            display: inline-block;
            font-size: 11px;
            padding: 4px 10px;
            border-radius: 20px;
            background: rgba(0, 229, 255, 0.12);
            color: var(--primary-neon-cyan);
            font-weight: 500;
        }

        /* 标签 */
        .tag-hot {
            display: inline-block;
            font-size: 11px;
            padding: 3px 8px;
            border-radius: 4px;
            background: var(--primary-electric-orange);
            color: #fff;
            font-weight: 700;
            letter-spacing: 0.5px;
        }
        .tag-new {
            display: inline-block;
            font-size: 11px;
            padding: 3px 8px;
            border-radius: 4px;
            background: var(--primary-neon-cyan);
            color: var(--bg-deep-space);
            font-weight: 700;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 8px;
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card-dark);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-brand);
            overflow: hidden;
            transition: border-color 0.25s ease;
        }
        .faq-item:hover {
            border-color: rgba(0, 229, 255, 0.3);
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 20px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 12px;
            cursor: pointer;
            transition: background 0.2s ease;
            background: none;
            border: none;
            font-family: inherit;
        }
        .faq-question:hover {
            background: rgba(0, 229, 255, 0.03);
        }
        .faq-icon {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-neon-cyan);
            font-size: 14px;
            transition: transform 0.3s ease;
        }
        .faq-item.open .faq-icon {
            transform: rotate(90deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 20px 0 52px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px 52px;
        }

        /* CTA横幅 */
        .cta-banner {
            background: linear-gradient(135deg, rgba(0, 229, 255, 0.08) 0%, rgba(0, 229, 255, 0.02) 50%, rgba(255, 94, 0, 0.05) 100%);
            border: 1px solid rgba(0, 229, 255, 0.2);
            border-radius: var(--radius-brand);
            padding: 48px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(0, 229, 255, 0.06);
            pointer-events: none;
        }
        .cta-banner h2 {
            font: var(--font-h2);
            color: var(--text-primary);
            margin: 0 0 10px;
            position: relative;
            z-index: 1;
        }
        .cta-banner p {
            font-size: 15px;
            color: var(--text-secondary);
            margin: 0 0 24px;
            position: relative;
            z-index: 1;
        }
        .btn-cta-primary {
            display: inline-block;
            background: var(--primary-neon-cyan);
            color: var(--bg-deep-space);
            padding: 14px 36px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 16px;
            transition: all 0.25s ease;
            position: relative;
            z-index: 1;
            cursor: pointer;
        }
        .btn-cta-primary:hover {
            background: #00C8E0;
            transform: scale(0.98);
            color: var(--bg-deep-space);
            box-shadow: 0 0 28px rgba(0, 229, 255, 0.35);
        }
        .btn-cta-secondary {
            display: inline-block;
            background: transparent;
            color: var(--primary-neon-cyan);
            border: 1px solid var(--primary-neon-cyan);
            padding: 14px 36px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 16px;
            transition: all 0.25s ease;
            cursor: pointer;
            margin-left: 12px;
        }
        .btn-cta-secondary:hover {
            background: rgba(0, 229, 255, 0.08);
            border-color: #00C8E0;
            color: #00C8E0;
        }
        @media (max-width: 640px) {
            .cta-banner {
                padding: 32px 20px;
            }
            .btn-cta-secondary {
                margin-left: 0;
                margin-top: 10px;
            }
        }

        /* 更新日志 */
        .changelog-item {
            display: flex;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid var(--border-subtle);
            align-items: flex-start;
        }
        .changelog-date {
            flex-shrink: 0;
            font-size: 13px;
            color: var(--primary-neon-cyan);
            font-weight: 500;
            min-width: 90px;
        }
        .changelog-content h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 4px;
        }
        .changelog-content p {
            font-size: 13px;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.6;
        }

        /* 页脚 */
        .site-footer {
            background: #0A0C10;
            border-top: 1px solid var(--primary-neon-cyan);
            padding: 56px 0 28px;
            color: var(--text-hint);
            font-size: 13px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-bottom: 40px;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
        }
        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 12px;
            letter-spacing: 0.3px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            color: var(--text-hint);
            font-size: 13px;
            transition: color 0.2s ease;
        }
        .footer-col ul li a:hover {
            color: var(--primary-neon-cyan);
        }
        .footer-bottom {
            text-align: center;
            border-top: 1px solid rgba(42, 46, 56, 0.5);
            padding-top: 24px;
            font-size: 12px;
            color: var(--text-hint);
            line-height: 2;
        }
        .footer-bottom a {
            color: var(--text-hint);
            margin: 0 8px;
            transition: color 0.2s ease;
        }
        .footer-bottom a:hover {
            color: var(--primary-neon-cyan);
        }
        .footer-sep {
            color: var(--border-subtle);
            margin: 0 4px;
        }

        /* 证言卡片 */
        .testimonial-card {
            background: var(--bg-card-dark);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-brand);
            padding: 24px;
            transition: all 0.25s ease;
        }
        .testimonial-card:hover {
            border-color: rgba(0, 229, 255, 0.4);
            box-shadow: var(--shadow-hover);
        }
        .testimonial-stars {
            color: #FFB800;
            font-size: 14px;
            margin-bottom: 8px;
            letter-spacing: 1px;
        }
        .testimonial-text {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0 0 12px;
        }
        .testimonial-author {
            font-size: 13px;
            color: var(--primary-neon-cyan);
            font-weight: 500;
        }
        .testimonial-role {
            font-size: 12px;
            color: var(--text-hint);
            margin-left: 6px;
        }

        /* 错位栅格 */
        .offset-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 20px;
        }
        @media (max-width: 1024px) {
            .offset-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 640px) {
            .offset-grid {
                grid-template-columns: 1fr;
            }
        }

        /* 能力标签 */
        .capability-tag {
            display: inline-block;
            padding: 8px 16px;
            background: rgba(0, 229, 255, 0.06);
            border: 1px solid rgba(0, 229, 255, 0.2);
            border-radius: 20px;
            font-size: 13px;
            color: var(--text-secondary);
            margin: 4px;
            transition: all 0.2s ease;
        }
        .capability-tag:hover {
            border-color: var(--primary-neon-cyan);
            color: var(--primary-neon-cyan);
            background: rgba(0, 229, 255, 0.1);
        }

        .divider-line {
            border: none;
            height: 1px;
            background: var(--border-subtle);
            margin: 0;
        }

/* roulang page: category2 */
:root {
            --primary-neon-cyan: #00E5FF;
            --primary-cyan-deep: #00C8E0;
            --primary-electric-orange: #FF5E00;
            --bg-deep-space: #0D1117;
            --bg-card-dark: #1C2333;
            --bg-card-hover: #252D3F;
            --text-primary: #FFFFFF;
            --text-secondary: #B0B8C4;
            --text-hint: #6E7681;
            --border-subtle: #2A2E38;
            --radius-data: 4px;
            --radius-brand: 12px;
            --radius-btn: 8px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
            --shadow-hover: 0 8px 32px rgba(0, 229, 255, 0.2);
            --font-h1: 600 42px/1.2 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-h2: 600 28px/1.3 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-h3: 500 18px/1.4 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-body: 400 15px/1.75 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-data: 400 16px 'SF Mono', 'Fira Code', monospace;
            --spacing-section: 120px;
            --spacing-mobile-section: 64px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            font-size: 15px;
            line-height: 1.75;
            color: #FFFFFF;
            background-color: #0D1117;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
        }

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
        }

        button:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--primary-neon-cyan);
            outline-offset: 3px;
            border-radius: 4px;
        }

        input {
            font-family: inherit;
            outline: none;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (max-width: 1024px) {
            .container {
                padding: 0 20px;
            }
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ========== 导航系统 ========== */
        .brand-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            border-bottom: 1px solid var(--border-subtle);
            flex-wrap: wrap;
            gap: 12px;
        }

        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: var(--primary-neon-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }

        .logo-icon::before {
            content: '';
            position: absolute;
            width: 18px;
            height: 2px;
            background: #0D1117;
            border-radius: 1px;
            top: 50%;
            left: 6px;
            transform: translateY(-4px);
        }
        .logo-icon::after {
            content: '';
            position: absolute;
            width: 14px;
            height: 2px;
            background: #0D1117;
            border-radius: 1px;
            top: 50%;
            left: 10px;
            transform: translateY(2px);
        }

        .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .brand-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }

        .brand-actions a {
            font-size: 13px;
            color: var(--text-secondary);
            padding: 7px 14px;
            border-radius: 6px;
            transition: all 0.2s ease;
        }
        .brand-actions a:hover {
            color: var(--primary-neon-cyan);
            background: rgba(0, 229, 255, 0.06);
        }
        .btn-subscribe-sm {
            background: var(--primary-neon-cyan);
            color: #0D1117 !important;
            font-weight: 600;
            font-size: 13px;
            padding: 7px 16px;
            border-radius: var(--radius-btn);
            transition: all 0.2s ease;
        }
        .btn-subscribe-sm:hover {
            background: var(--primary-cyan-deep) !important;
            transform: scale(0.98);
            color: #0D1117 !important;
        }

        .channel-row {
            display: flex;
            align-items: center;
            gap: 4px;
            padding: 10px 0;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            flex-wrap: nowrap;
        }
        .channel-row::-webkit-scrollbar {
            display: none;
        }

        .channel-tag {
            display: inline-block;
            padding: 8px 18px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 6px;
            white-space: nowrap;
            transition: all 0.2s ease;
            position: relative;
            flex-shrink: 0;
            cursor: pointer;
        }
        .channel-tag:hover {
            color: var(--primary-neon-cyan);
            background: rgba(0, 229, 255, 0.05);
        }
        .channel-tag.active {
            color: var(--primary-neon-cyan);
            font-weight: 600;
        }
        .channel-tag.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 18px;
            right: 18px;
            height: 3px;
            background: var(--primary-neon-cyan);
            border-radius: 2px;
        }

        .hamburger-btn {
            display: none;
            background: none;
            color: #FFFFFF;
            font-size: 24px;
            padding: 4px 8px;
            border-radius: 4px;
            cursor: pointer;
            border: 1px solid var(--border-subtle);
            transition: all 0.2s ease;
        }
        .hamburger-btn:hover {
            border-color: var(--primary-neon-cyan);
            color: var(--primary-neon-cyan);
        }

        @media (max-width: 768px) {
            .hamburger-btn {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }
            .channel-row {
                display: none;
                flex-direction: column;
                align-items: stretch;
                gap: 2px;
                padding: 8px 0;
                background: var(--bg-card-dark);
                border-radius: 8px;
                margin-top: 4px;
            }
            .channel-row.open {
                display: flex;
            }
            .channel-tag {
                padding: 12px 18px;
                border-radius: 0;
            }
            .channel-tag.active::after {
                left: 0;
                right: auto;
                top: 50%;
                bottom: auto;
                transform: translateY(-50%);
                width: 3px;
                height: 24px;
                border-radius: 2px;
            }
            .brand-bar {
                padding: 10px 0;
                gap: 8px;
            }
            .logo-text {
                font-size: 17px;
            }
            .brand-actions a {
                font-size: 12px;
                padding: 5px 10px;
            }
            .btn-subscribe-sm {
                font-size: 12px;
                padding: 5px 12px;
            }
        }

        /* ========== 面包屑 ========== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 16px 0;
            font-size: 13px;
            color: var(--text-hint);
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-secondary);
            transition: color 0.2s;
        }
        .breadcrumb a:hover {
            color: var(--primary-neon-cyan);
        }
        .breadcrumb .sep {
            color: var(--text-hint);
            user-select: none;
        }
        .breadcrumb .current {
            color: var(--primary-neon-cyan);
            font-weight: 500;
        }

        /* ========== Hero - 左大图头条+右侧榜单 ========== */
        .hero-analysis {
            display: grid;
            grid-template-columns: 1fr 380px;
            gap: 28px;
            padding: 40px 0 48px;
            align-items: start;
        }

        .hero-featured {
            position: relative;
            border-radius: var(--radius-brand);
            overflow: hidden;
            background: var(--bg-card-dark);
            transition: all 0.3s ease;
            cursor: pointer;
            display: flex;
            flex-direction: column;
        }
        .hero-featured:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .hero-featured-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
        }
        .hero-featured-body {
            padding: 24px 28px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .hero-featured-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 4px;
            background: var(--primary-neon-cyan);
            color: #0D1117;
            letter-spacing: 0.3px;
            align-self: flex-start;
        }
        .hero-featured-title {
            font-size: 26px;
            font-weight: 700;
            line-height: 1.3;
            color: #FFFFFF;
            margin: 0;
        }
        .hero-featured-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin: 0;
        }
        .hero-featured-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 12px;
            color: var(--text-hint);
            margin-top: auto;
        }
        .hero-featured-meta span {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .hero-sidebar {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .hero-rank-card {
            background: var(--bg-card-dark);
            border-radius: var(--radius-brand);
            padding: 20px 20px 16px;
            border: 1px solid var(--border-subtle);
        }
        .hero-rank-title {
            font-size: 16px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .hero-rank-title .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--primary-electric-orange);
            display: inline-block;
            animation: pulse-dot 1.5s ease-in-out infinite;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                box-shadow: 0 0 0 0 rgba(255, 94, 0, 0.6);
            }
            50% {
                opacity: 0.6;
                box-shadow: 0 0 0 8px rgba(255, 94, 0, 0);
            }
        }
        .hero-rank-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .hero-rank-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 9px 10px;
            border-radius: 6px;
            cursor: pointer;
            transition: all 0.2s ease;
            font-size: 14px;
            color: var(--text-secondary);
        }
        .hero-rank-list li:hover {
            background: var(--bg-card-hover);
            color: #FFFFFF;
        }
        .rank-num {
            width: 24px;
            height: 24px;
            border-radius: 4px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 13px;
            flex-shrink: 0;
            color: #0D1117;
        }
        .rank-num.top1 {
            background: var(--primary-electric-orange);
        }
        .rank-num.top2 {
            background: #FF8C42;
        }
        .rank-num.top3 {
            background: #FFB347;
        }
        .rank-num.normal {
            background: #3A3F4B;
            color: #B0B8C4;
        }

        .hero-tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .hero-tag-cloud a {
            display: inline-block;
            font-size: 12px;
            padding: 6px 14px;
            border-radius: 20px;
            border: 1px solid var(--border-subtle);
            color: var(--text-secondary);
            transition: all 0.2s ease;
            white-space: nowrap;
        }
        .hero-tag-cloud a:hover {
            border-color: var(--primary-neon-cyan);
            color: var(--primary-neon-cyan);
            background: rgba(0, 229, 255, 0.06);
            box-shadow: 0 0 12px rgba(0, 229, 255, 0.1);
        }

        @media (max-width: 1024px) {
            .hero-analysis {
                grid-template-columns: 1fr 300px;
                gap: 20px;
            }
            .hero-featured-title {
                font-size: 22px;
            }
            .hero-featured-body {
                padding: 18px 20px 20px;
            }
        }
        @media (max-width: 768px) {
            .hero-analysis {
                grid-template-columns: 1fr;
                gap: 20px;
                padding: 24px 0 32px;
            }
            .hero-featured-title {
                font-size: 20px;
            }
            .hero-rank-card {
                padding: 16px;
            }
            .hero-featured-body {
                padding: 16px;
            }
        }

        /* ========== 板块通用 ========== */
        .section-block {
            padding: 64px 0;
        }
        .section-title {
            font-size: 28px;
            font-weight: 600;
            line-height: 1.3;
            color: #FFFFFF;
            margin-bottom: 8px;
            letter-spacing: 0.3px;
        }
        .section-subtitle {
            font-size: 15px;
            color: var(--text-hint);
            margin-bottom: 36px;
            line-height: 1.6;
        }
        @media (max-width: 768px) {
            .section-block {
                padding: 40px 0;
            }
            .section-title {
                font-size: 22px;
            }
            .section-subtitle {
                font-size: 14px;
                margin-bottom: 24px;
            }
        }

        /* ========== 分析文章列表 ========== */
        .analysis-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            border-top: 1px solid var(--border-subtle);
        }
        .analysis-item {
            display: flex;
            gap: 16px;
            padding: 18px 0;
            border-bottom: 1px solid var(--border-subtle);
            cursor: pointer;
            transition: all 0.2s ease;
            align-items: flex-start;
        }
        .analysis-item:hover {
            background: rgba(28, 35, 51, 0.5);
            padding-left: 8px;
            padding-right: 8px;
            margin: 0 -8px;
            border-radius: 8px;
            border-bottom-color: transparent;
        }
        .analysis-item:hover .analysis-thumb {
            border-color: var(--primary-neon-cyan);
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.18);
        }
        .analysis-thumb {
            width: 80px;
            height: 80px;
            border-radius: 6px;
            object-fit: cover;
            flex-shrink: 0;
            border: 2px solid transparent;
            transition: all 0.25s ease;
        }
        .analysis-content {
            flex: 1;
            min-width: 0;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .analysis-content h3 {
            font-size: 17px;
            font-weight: 600;
            color: #FFFFFF;
            line-height: 1.4;
            margin: 0;
            transition: color 0.2s;
        }
        .analysis-item:hover .analysis-content h3 {
            color: var(--primary-neon-cyan);
        }
        .analysis-summary {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
            margin: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .analysis-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 12px;
            color: var(--text-hint);
            flex-wrap: wrap;
        }
        .analysis-meta .date-tag {
            color: var(--primary-neon-cyan);
            font-weight: 500;
        }
        .analysis-meta .badge-new {
            display: inline-block;
            font-size: 11px;
            padding: 2px 7px;
            border-radius: 3px;
            background: var(--primary-neon-cyan);
            color: #0D1117;
            font-weight: 600;
        }
        @media (max-width: 768px) {
            .analysis-thumb {
                width: 64px;
                height: 64px;
            }
            .analysis-content h3 {
                font-size: 15px;
            }
            .analysis-summary {
                font-size: 13px;
                -webkit-line-clamp: 2;
            }
            .analysis-item {
                padding: 14px 0;
                gap: 12px;
            }
        }

        /* ========== 专题推荐卡片 ========== */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .topic-card {
            border-radius: var(--radius-brand);
            overflow: hidden;
            background: var(--bg-card-dark);
            transition: all 0.3s ease;
            cursor: pointer;
            border: 1px solid var(--border-subtle);
            display: flex;
            flex-direction: column;
        }
        .topic-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-neon-cyan);
        }
        .topic-card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
        }
        .topic-card-body {
            padding: 16px 18px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .topic-card-body h3 {
            font-size: 16px;
            font-weight: 600;
            color: #FFFFFF;
            margin: 0;
            line-height: 1.4;
        }
        .topic-card-body p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }
        .topic-card-tag {
            display: inline-block;
            font-size: 11px;
            padding: 3px 8px;
            border-radius: 4px;
            border: 1px solid var(--border-subtle);
            color: var(--text-hint);
            align-self: flex-start;
            transition: all 0.2s;
        }
        .topic-card:hover .topic-card-tag {
            border-color: var(--primary-neon-cyan);
            color: var(--primary-neon-cyan);
        }
        @media (max-width: 1024px) {
            .topic-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }
        @media (max-width: 520px) {
            .topic-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
        }

        /* ========== 数据洞察卡片 ========== */
        .insight-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
        }
        .insight-card {
            background: var(--bg-card-dark);
            border-radius: var(--radius-brand);
            padding: 24px 20px;
            text-align: center;
            border: 1px solid var(--border-subtle);
            transition: all 0.3s ease;
        }
        .insight-card:hover {
            border-color: var(--primary-neon-cyan);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.1);
            transform: translateY(-2px);
        }
        .insight-number {
            font-family: var(--font-data);
            font-size: 36px;
            font-weight: 700;
            color: var(--primary-neon-cyan);
            line-height: 1;
            margin-bottom: 6px;
        }
        .insight-label {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 4px;
        }
        .insight-trend {
            font-size: 12px;
            color: #00E5A0;
            font-weight: 500;
        }
        .insight-trend.down {
            color: #FF5E5E;
        }
        @media (max-width: 768px) {
            .insight-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .insight-number {
                font-size: 28px;
            }
            .insight-card {
                padding: 18px 14px;
            }
        }

        /* ========== FAQ 手风琴 ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .faq-item {
            background: var(--bg-card-dark);
            border-radius: 8px;
            border: 1px solid var(--border-subtle);
            overflow: hidden;
            transition: all 0.2s ease;
            cursor: pointer;
        }
        .faq-item:hover {
            background: var(--bg-card-hover);
        }
        .faq-question {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 18px 20px;
            font-size: 16px;
            font-weight: 500;
            color: #FFFFFF;
            user-select: none;
            transition: color 0.2s;
        }
        .faq-item:hover .faq-question {
            color: var(--primary-neon-cyan);
        }
        .faq-icon {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--primary-neon-cyan);
            transition: transform 0.3s ease;
            margin-top: 1px;
        }
        .faq-item.open .faq-icon {
            transform: rotate(90deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            padding: 0 20px 0 52px;
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 20px 18px 52px;
        }
        @media (max-width: 768px) {
            .faq-question {
                font-size: 14px;
                padding: 14px 16px;
            }
            .faq-answer {
                font-size: 13px;
                padding: 0 16px 0 44px;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 14px 44px;
            }
        }

        /* ========== CTA 横幅 ========== */
        .cta-banner {
            background: linear-gradient(135deg, #1C2333 0%, #161E2D 60%, #1A2440 100%);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-brand);
            padding: 48px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(0, 229, 255, 0.04);
            pointer-events: none;
        }
        .cta-banner h2 {
            font-size: 26px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }
        .cta-banner p {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 24px;
            position: relative;
            z-index: 1;
        }
        .btn-cta-primary {
            display: inline-block;
            padding: 13px 32px;
            font-size: 15px;
            font-weight: 600;
            background: var(--primary-neon-cyan);
            color: #0D1117;
            border-radius: var(--radius-btn);
            transition: all 0.2s ease;
            position: relative;
            z-index: 1;
            letter-spacing: 0.3px;
        }
        .btn-cta-primary:hover {
            background: var(--primary-cyan-deep);
            transform: scale(0.98);
            box-shadow: 0 4px 20px rgba(0, 229, 255, 0.3);
        }
        .btn-cta-secondary {
            display: inline-block;
            padding: 12px 28px;
            font-size: 15px;
            font-weight: 500;
            background: transparent;
            color: var(--primary-neon-cyan);
            border: 1px solid var(--primary-neon-cyan);
            border-radius: var(--radius-btn);
            transition: all 0.2s ease;
            margin-left: 12px;
            position: relative;
            z-index: 1;
        }
        .btn-cta-secondary:hover {
            background: rgba(0, 229, 255, 0.08);
            border-color: #00F0FF;
            box-shadow: 0 4px 16px rgba(0, 229, 255, 0.2);
        }
        @media (max-width: 768px) {
            .cta-banner {
                padding: 32px 20px;
            }
            .cta-banner h2 {
                font-size: 22px;
            }
            .btn-cta-secondary {
                margin-left: 0;
                margin-top: 10px;
            }
            .btn-cta-primary {
                display: block;
                width: 100%;
            }
            .btn-cta-secondary {
                display: block;
                width: 100%;
            }
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background: #0A0C10;
            border-top: 1px solid var(--primary-neon-cyan);
            padding: 48px 0 28px;
            margin-top: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul li a {
            font-size: 13px;
            color: var(--text-hint);
            transition: color 0.2s;
        }
        .footer-col ul li a:hover {
            color: var(--primary-neon-cyan);
        }
        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid var(--border-subtle);
            font-size: 12px;
            color: var(--text-hint);
            line-height: 2;
        }
        .footer-bottom a {
            color: var(--text-hint);
            transition: color 0.2s;
        }
        .footer-bottom a:hover {
            color: var(--primary-neon-cyan);
        }
        .footer-sep {
            margin: 0 8px;
            color: #3A3F4B;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .site-footer {
                padding: 32px 0 20px;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
        }

        /* ========== 额外装饰 ========== */
        .badge-hot {
            display: inline-block;
            font-size: 10px;
            padding: 2px 6px;
            border-radius: 3px;
            background: var(--primary-electric-orange);
            color: #FFFFFF;
            font-weight: 700;
            letter-spacing: 0.5px;
            animation: pulse-badge 2s ease-in-out infinite;
        }
        @keyframes pulse-badge {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.7;
            }
        }
        .divider-line {
            height: 1px;
            background: var(--border-subtle);
            margin: 0;
            border: none;
        }

/* roulang page: category1 */
:root {
            --primary-neon-cyan: #00E5FF;
            --primary-cyan-deep: #00C8E0;
            --primary-electric-orange: #FF5E00;
            --bg-deep-space: #0D1117;
            --bg-card-dark: #1C2333;
            --bg-card-hover: #252D3F;
            --bg-elevated: #161B22;
            --text-primary: #FFFFFF;
            --text-secondary: #B0B8C4;
            --text-hint: #6E7681;
            --border-subtle: #2A2E38;
            --border-cyan-glow: rgba(0, 229, 255, 0.3);
            --radius-data: 4px;
            --radius-brand: 12px;
            --radius-btn: 8px;
            --radius-card: 10px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
            --shadow-hover: 0 8px 32px rgba(0, 229, 255, 0.2);
            --shadow-glow-cyan: 0 0 16px rgba(0, 229, 255, 0.15);
            --font-h1: 600 42px/1.2 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-h2: 600 28px/1.3 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-h3: 500 18px/1.4 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-body: 400 15px/1.75 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-data: 400 16px 'SF Mono', 'Fira Code', 'Consolas', monospace;
            --font-score-lg: 700 28px 'SF Mono', 'Fira Code', 'Consolas', monospace;
            --spacing-section: 120px;
            --spacing-mobile-section: 64px;
            --transition-fast: 0.15s ease;
            --transition-smooth: 0.25s ease;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font: var(--font-body);
            background-color: var(--bg-deep-space);
            color: var(--text-primary);
            min-height: 100vh;
            line-height: 1.75;
            overflow-x: hidden;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
            color: inherit;
        }

        input {
            font-family: inherit;
        }

        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header - 品牌行 */
        .brand-bar {
            background: #0A0C10;
            border-bottom: 1px solid var(--border-subtle);
            padding: 10px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .brand-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: var(--radius-data);
            background: var(--primary-neon-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }
        .logo-icon::before {
            content: '';
            position: absolute;
            width: 24px;
            height: 2px;
            background: #0D1117;
            border-radius: 1px;
            top: 50%;
            left: 6px;
            transform: translateY(-4px);
        }
        .logo-icon::after {
            content: '';
            position: absolute;
            width: 18px;
            height: 2px;
            background: #0D1117;
            border-radius: 1px;
            top: 50%;
            left: 9px;
            transform: translateY(4px);
        }
        .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.5px;
        }
        .brand-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn-subscribe-sm {
            padding: 7px 16px;
            border-radius: var(--radius-btn);
            background: transparent;
            border: 1px solid var(--border-subtle);
            color: var(--text-secondary);
            font-size: 13px;
            font-weight: 500;
            transition: all var(--transition-smooth);
            white-space: nowrap;
        }
        .btn-subscribe-sm:hover {
            border-color: var(--primary-neon-cyan);
            color: var(--primary-neon-cyan);
            box-shadow: var(--shadow-glow-cyan);
        }

        /* Header - 频道行 */
        .channel-row {
            background: var(--bg-elevated);
            border-bottom: 1px solid var(--border-subtle);
            padding: 0;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            position: sticky;
            top: 57px;
            z-index: 999;
        }
        .channel-row .container {
            display: flex;
            align-items: center;
            gap: 0;
            flex-wrap: nowrap;
            min-width: max-content;
        }
        .channel-tag {
            display: inline-block;
            padding: 13px 20px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            border-bottom: 3px solid transparent;
            transition: all var(--transition-smooth);
            position: relative;
            letter-spacing: 0.3px;
        }
        .channel-tag:hover {
            color: var(--primary-neon-cyan);
            background: rgba(0, 229, 255, 0.04);
        }
        .channel-tag.active {
            color: var(--primary-neon-cyan);
            border-bottom-color: var(--primary-neon-cyan);
            font-weight: 600;
        }
        .hamburger-toggle {
            display: none;
            padding: 10px;
            color: var(--text-primary);
            font-size: 22px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            min-width: 44px;
            min-height: 44px;
            border-radius: 6px;
            transition: background var(--transition-fast);
        }
        .hamburger-toggle:hover {
            background: var(--bg-card-dark);
        }

        /* Breadcrumb */
        .breadcrumb-wrap {
            background: var(--bg-deep-space);
            padding: 14px 0;
            border-bottom: 1px solid rgba(42, 46, 56, 0.5);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-hint);
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }
        .breadcrumb a:hover {
            color: var(--primary-neon-cyan);
        }
        .breadcrumb .sep {
            color: var(--text-hint);
            user-select: none;
        }
        .breadcrumb .current {
            color: var(--primary-neon-cyan);
            font-weight: 500;
        }

        /* Hero - 数据风暴区 */
        .hero-data-storm {
            padding: 48px 0 60px;
            background: linear-gradient(180deg, #0D1117 0%, #111820 40%, #0D1117 100%);
            position: relative;
            overflow: hidden;
        }
        .hero-data-storm::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(rgba(0, 229, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 229, 255, 0.03) 1px, transparent 1px);
            background-size: 60px 60px;
            pointer-events: none;
        }
        .hero-data-storm .container {
            position: relative;
            z-index: 1;
        }
        .hero-header {
            text-align: center;
            margin-bottom: 36px;
        }
        .hero-header h1 {
            font: var(--font-h1);
            color: var(--text-primary);
            letter-spacing: 1px;
            margin-bottom: 8px;
        }
        .hero-header .hero-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            letter-spacing: 0.5px;
        }
        .hero-header .live-dot {
            display: inline-block;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--primary-electric-orange);
            margin-right: 6px;
            animation: pulse-dot 1.2s ease-in-out infinite;
            vertical-align: middle;
            position: relative;
            top: -1px;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(255, 94, 0, 0.7);
            }
            50% {
                box-shadow: 0 0 0 10px rgba(255, 94, 0, 0);
            }
        }
        .stats-strip {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 12px;
            margin-bottom: 28px;
        }
        .stat-mini-card {
            background: var(--bg-card-dark);
            border-radius: var(--radius-data);
            padding: 16px 18px;
            text-align: center;
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-smooth);
            cursor: pointer;
        }
        .stat-mini-card:hover {
            border-color: var(--border-cyan-glow);
            box-shadow: var(--shadow-glow-cyan);
            background: var(--bg-card-hover);
        }
        .stat-mini-card .stat-num {
            font: var(--font-score-lg);
            color: var(--primary-neon-cyan);
            letter-spacing: 1px;
        }
        .stat-mini-card .stat-label {
            font-size: 12px;
            color: var(--text-hint);
            margin-top: 4px;
            letter-spacing: 0.5px;
        }
        .score-cards-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 10px;
            margin-bottom: 28px;
        }
        .score-card {
            background: var(--bg-card-dark);
            border-radius: var(--radius-data);
            padding: 14px 12px;
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-smooth);
            cursor: pointer;
            position: relative;
            min-width: 0;
        }
        .score-card:hover {
            border-color: var(--border-cyan-glow);
            box-shadow: var(--shadow-glow-cyan);
            background: var(--bg-card-hover);
            transform: translateY(-1px);
        }
        .score-card .card-league-tag {
            display: inline-block;
            font-size: 10px;
            font-weight: 600;
            padding: 3px 8px;
            border-radius: 3px;
            letter-spacing: 0.8px;
            margin-bottom: 8px;
            background: rgba(0, 229, 255, 0.12);
            color: var(--primary-neon-cyan);
            text-transform: uppercase;
        }
        .score-card .card-league-tag.live-tag {
            background: rgba(255, 94, 0, 0.2);
            color: var(--primary-electric-orange);
        }
        .score-card .card-teams {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 8px;
            margin-bottom: 6px;
        }
        .score-card .team-name {
            font-size: 12px;
            font-weight: 500;
            color: var(--text-primary);
            flex: 1;
            text-align: center;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            letter-spacing: 0.3px;
        }
        .score-card .score-display {
            font: var(--font-score-lg);
            color: var(--primary-neon-cyan);
            text-align: center;
            letter-spacing: 2px;
            flex-shrink: 0;
            min-width: 60px;
        }
        .score-card .score-display.pending {
            color: var(--text-hint);
            font-size: 14px;
            letter-spacing: 0;
        }
        .score-card .card-meta {
            font-size: 11px;
            color: var(--text-hint);
            text-align: center;
            margin-top: 4px;
            letter-spacing: 0.3px;
        }
        .score-card .live-indicator {
            position: absolute;
            top: 8px;
            right: 10px;
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--primary-electric-orange);
            animation: pulse-dot 1.2s ease-in-out infinite;
        }
        .hero-quick-links {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .btn-quick {
            padding: 10px 20px;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 500;
            transition: all var(--transition-smooth);
            letter-spacing: 0.4px;
            white-space: nowrap;
        }
        .btn-quick.primary {
            background: var(--primary-neon-cyan);
            color: #0D1117;
            font-weight: 600;
        }
        .btn-quick.primary:hover {
            background: var(--primary-cyan-deep);
            box-shadow: 0 0 24px rgba(0, 229, 255, 0.35);
            transform: scale(0.98);
        }
        .btn-quick.secondary {
            background: transparent;
            border: 1px solid var(--primary-neon-cyan);
            color: var(--primary-neon-cyan);
        }
        .btn-quick.secondary:hover {
            background: rgba(0, 229, 255, 0.08);
            border-color: var(--primary-cyan-deep);
            box-shadow: var(--shadow-glow-cyan);
        }
        .btn-quick.ghost {
            background: var(--bg-card-dark);
            border: 1px solid var(--border-subtle);
            color: var(--text-secondary);
        }
        .btn-quick.ghost:hover {
            border-color: var(--primary-neon-cyan);
            color: var(--primary-neon-cyan);
            background: var(--bg-card-hover);
        }

        /* Section共通 */
        .section {
            padding: var(--spacing-section) 0;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font: var(--font-h2);
            color: var(--text-primary);
            letter-spacing: 0.8px;
            margin-bottom: 10px;
        }
        .section-header .section-desc {
            font-size: 15px;
            color: var(--text-hint);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .section-divider {
            width: 60px;
            height: 3px;
            background: var(--primary-neon-cyan);
            border-radius: 2px;
            margin: 0 auto 12px;
            opacity: 0.8;
        }

        /* 核心优势区 */
        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .adv-card {
            background: var(--bg-card-dark);
            border-radius: var(--radius-brand);
            padding: 28px 24px;
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-smooth);
            text-align: center;
        }
        .adv-card:hover {
            border-color: var(--border-cyan-glow);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
            background: var(--bg-card-hover);
        }
        .adv-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-brand);
            background: rgba(0, 229, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 24px;
            color: var(--primary-neon-cyan);
        }
        .adv-card h3 {
            font: var(--font-h3);
            color: var(--text-primary);
            margin-bottom: 8px;
            letter-spacing: 0.4px;
        }
        .adv-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* 覆盖赛区 */
        .regions-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 10px;
        }
        .region-tag-card {
            background: var(--bg-card-dark);
            border-radius: var(--radius-data);
            padding: 18px 12px;
            text-align: center;
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-smooth);
            cursor: pointer;
            font-weight: 500;
            font-size: 14px;
            color: var(--text-primary);
            letter-spacing: 0.5px;
        }
        .region-tag-card:hover {
            border-color: var(--primary-neon-cyan);
            box-shadow: var(--shadow-glow-cyan);
            background: var(--bg-card-hover);
            color: var(--primary-neon-cyan);
        }

        /* 使用场景 */
        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .scenario-card {
            background: var(--bg-card-dark);
            border-radius: var(--radius-brand);
            padding: 24px;
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-smooth);
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }
        .scenario-card:hover {
            border-color: var(--border-cyan-glow);
            box-shadow: var(--shadow-hover);
        }
        .scenario-num {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(0, 229, 255, 0.1);
            color: var(--primary-neon-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
        }
        .scenario-content h3 {
            font: var(--font-h3);
            color: var(--text-primary);
            margin-bottom: 6px;
            letter-spacing: 0.3px;
        }
        .scenario-content p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* 资讯动态 */
        .news-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }
        .news-item {
            display: flex;
            gap: 14px;
            background: var(--bg-card-dark);
            border-radius: var(--radius-card);
            padding: 16px;
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-smooth);
            cursor: pointer;
            align-items: flex-start;
        }
        .news-item:hover {
            border-color: var(--border-cyan-glow);
            box-shadow: var(--shadow-glow-cyan);
            background: var(--bg-card-hover);
        }
        .news-thumb {
            flex-shrink: 0;
            width: 80px;
            height: 60px;
            border-radius: var(--radius-data);
            object-fit: cover;
            background: var(--bg-elevated);
        }
        .news-info {
            flex: 1;
            min-width: 0;
        }
        .news-info .news-date {
            font-size: 11px;
            color: var(--primary-neon-cyan);
            letter-spacing: 0.4px;
            margin-bottom: 4px;
        }
        .news-info h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 5px;
            line-height: 1.4;
            letter-spacing: 0.3px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-info .news-excerpt {
            font-size: 13px;
            color: var(--text-hint);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-info .read-more {
            display: inline-block;
            font-size: 12px;
            color: var(--primary-neon-cyan);
            margin-top: 6px;
            font-weight: 500;
            letter-spacing: 0.3px;
            transition: all var(--transition-fast);
            border-bottom: 1px solid transparent;
        }
        .news-item:hover .read-more {
            border-bottom-color: var(--primary-neon-cyan);
        }

        /* 专题推荐 */
        .topics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .topic-card {
            background: var(--bg-card-dark);
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-smooth);
            cursor: pointer;
        }
        .topic-card:hover {
            border-color: var(--border-cyan-glow);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .topic-card img {
            width: 100%;
            height: 140px;
            object-fit: cover;
            background: var(--bg-elevated);
        }
        .topic-card .topic-body {
            padding: 16px;
        }
        .topic-card .topic-tag {
            display: inline-block;
            font-size: 10px;
            padding: 3px 8px;
            border-radius: 3px;
            background: rgba(0, 229, 255, 0.12);
            color: var(--primary-neon-cyan);
            font-weight: 500;
            letter-spacing: 0.5px;
            margin-bottom: 6px;
        }
        .topic-card h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
            line-height: 1.4;
            letter-spacing: 0.3px;
        }
        .topic-card .topic-desc {
            font-size: 12px;
            color: var(--text-hint);
            line-height: 1.5;
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .faq-item {
            background: var(--bg-card-dark);
            border-radius: var(--radius-card);
            border: 1px solid var(--border-subtle);
            overflow: hidden;
            transition: all var(--transition-smooth);
        }
        .faq-item:hover {
            background: var(--bg-card-hover);
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 20px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            letter-spacing: 0.3px;
            cursor: pointer;
            transition: color var(--transition-fast);
        }
        .faq-question:hover {
            color: var(--primary-neon-cyan);
        }
        .faq-icon {
            flex-shrink: 0;
            width: 20px;
            height: 20px;
            position: relative;
            transition: transform var(--transition-smooth);
        }
        .faq-icon::before,
        .faq-icon::after {
            content: '';
            position: absolute;
            background: var(--primary-neon-cyan);
            border-radius: 1px;
        }
        .faq-icon::before {
            width: 14px;
            height: 2px;
            top: 9px;
            left: 3px;
        }
        .faq-icon::after {
            width: 2px;
            height: 14px;
            top: 3px;
            left: 9px;
            transition: transform var(--transition-smooth);
        }
        .faq-item.open .faq-icon {
            transform: rotate(90deg);
        }
        .faq-item.open .faq-icon::after {
            transform: scaleY(0);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
        }
        .faq-answer-inner {
            padding: 0 20px 18px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            letter-spacing: 0.2px;
        }

        /* CTA横幅 */
        .cta-banner {
            background: linear-gradient(135deg, #111820 0%, #1a2330 50%, #111820 100%);
            border: 1px solid var(--border-cyan-glow);
            border-radius: var(--radius-brand);
            padding: 48px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(0, 229, 255, 0.06) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-banner h2 {
            font: var(--font-h2);
            color: var(--text-primary);
            letter-spacing: 0.8px;
            position: relative;
            z-index: 1;
        }
        .cta-banner p {
            font-size: 15px;
            color: var(--text-secondary);
            margin: 12px 0 24px;
            position: relative;
            z-index: 1;
            letter-spacing: 0.3px;
        }
        .cta-banner .btn-cta-lg {
            display: inline-block;
            padding: 14px 36px;
            border-radius: var(--radius-btn);
            background: var(--primary-neon-cyan);
            color: #0D1117;
            font-weight: 600;
            font-size: 16px;
            letter-spacing: 0.5px;
            transition: all var(--transition-smooth);
            position: relative;
            z-index: 1;
        }
        .cta-banner .btn-cta-lg:hover {
            background: var(--primary-cyan-deep);
            box-shadow: 0 0 32px rgba(0, 229, 255, 0.4);
            transform: scale(0.97);
        }

        /* Footer */
        .site-footer {
            background: #0A0C10;
            border-top: 1px solid var(--primary-neon-cyan);
            padding: 48px 0 24px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.6px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 13px;
            color: var(--text-hint);
            transition: color var(--transition-fast);
            letter-spacing: 0.3px;
        }
        .footer-col ul li a:hover {
            color: var(--primary-neon-cyan);
        }
        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid var(--border-subtle);
            font-size: 12px;
            color: var(--text-hint);
            line-height: 2;
            letter-spacing: 0.3px;
        }
        .footer-bottom a {
            color: var(--text-hint);
            transition: color var(--transition-fast);
        }
        .footer-bottom a:hover {
            color: var(--primary-neon-cyan);
        }
        .footer-sep {
            margin: 0 8px;
            color: var(--border-subtle);
            user-select: none;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .score-cards-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .advantages-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .regions-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .topics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-list {
                grid-template-columns: 1fr;
            }
            .stats-strip {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            :root {
                --spacing-section: 80px;
            }
            .hero-header h1 {
                font-size: 32px;
            }
            .scenarios-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .channel-row .container {
                flex-wrap: wrap;
                gap: 0;
            }
            .channel-tag {
                padding: 10px 14px;
                font-size: 12px;
                border-bottom-width: 2px;
            }
            .hamburger-toggle {
                display: flex;
            }
            .channel-row .container>.channel-tag {
                display: none;
            }
            .channel-row.mobile-open .container>.channel-tag {
                display: block;
                width: 100%;
                text-align: center;
                border-bottom: 1px solid var(--border-subtle);
            }
            .channel-row.mobile-open .container {
                flex-direction: column;
            }
            .score-cards-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 8px;
            }
            .score-card {
                padding: 10px 8px;
            }
            .score-card .score-display {
                font-size: 20px;
                min-width: 44px;
            }
            .score-card .team-name {
                font-size: 10px;
            }
            .stats-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 8px;
            }
            .advantages-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .regions-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 6px;
            }
            .region-tag-card {
                font-size: 12px;
                padding: 12px 6px;
            }
            .scenarios-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .topics-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
            .news-list {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .hero-quick-links {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-quick-links .btn-quick {
                text-align: center;
            }
            .hero-header h1 {
                font-size: 26px;
            }
            .hero-header .hero-subtitle {
                font-size: 13px;
            }
            .section-header h2 {
                font-size: 22px;
            }
            :root {
                --spacing-section: 56px;
            }
            .cta-banner {
                padding: 32px 20px;
            }
            .cta-banner h2 {
                font-size: 22px;
            }
            .brand-bar .container {
                flex-wrap: wrap;
                gap: 8px;
            }
            .logo-text {
                font-size: 17px;
            }
        }

        @media (max-width: 520px) {
            .score-cards-grid {
                grid-template-columns: 1fr 1fr;
                gap: 6px;
            }
            .score-card {
                padding: 8px 6px;
                border-radius: 4px;
            }
            .score-card .score-display {
                font-size: 16px;
                min-width: 36px;
                letter-spacing: 1px;
            }
            .score-card .team-name {
                font-size: 9px;
            }
            .score-card .card-league-tag {
                font-size: 8px;
                padding: 2px 5px;
            }
            .score-card .card-meta {
                font-size: 9px;
            }
            .stats-strip {
                grid-template-columns: 1fr 1fr;
                gap: 6px;
            }
            .stat-mini-card {
                padding: 10px 8px;
            }
            .stat-mini-card .stat-num {
                font-size: 20px;
            }
            .regions-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .topics-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 16px;
                text-align: center;
            }
            .container {
                padding: 0 12px;
            }
            .hero-header h1 {
                font-size: 22px;
            }
            .section-header h2 {
                font-size: 19px;
            }
            .news-thumb {
                width: 60px;
                height: 48px;
            }
            .news-info h3 {
                font-size: 13px;
            }
            .news-info .news-excerpt {
                font-size: 11px;
                -webkit-line-clamp: 2;
            }
            .faq-question {
                font-size: 14px;
                padding: 14px 14px;
            }
            .faq-answer-inner {
                font-size: 13px;
                padding: 0 14px 14px;
            }
            .cta-banner .btn-cta-lg {
                font-size: 14px;
                padding: 12px 24px;
            }
            .btn-subscribe-sm {
                font-size: 11px;
                padding: 6px 10px;
            }
        }

/* roulang page: category4 */
:root {
            --primary-neon-cyan: #00E5FF;
            --primary-electric-orange: #FF5E00;
            --bg-deep-space: #0D1117;
            --bg-card-dark: #1C2333;
            --bg-card-hover: #252D3F;
            --bg-input: #161B22;
            --text-primary: #FFFFFF;
            --text-secondary: #B0B8C4;
            --text-hint: #6E7681;
            --border-subtle: #2A2E38;
            --radius-data: 4px;
            --radius-brand: 12px;
            --radius-btn: 8px;
            --radius-lg: 16px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
            --shadow-hover: 0 8px 32px rgba(0, 229, 255, 0.2);
            --shadow-glow-cyan: 0 0 24px rgba(0, 229, 255, 0.18);
            --font-h1: 600 42px/1.2 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-h2: 600 28px/1.3 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-h3: 500 18px/1.4 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-body: 400 15px/1.75 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-data: 400 16px 'SF Mono', 'Fira Code', 'Courier New', monospace;
            --spacing-section: 100px;
            --spacing-mobile-section: 56px;
            --transition-fast: 0.18s ease;
            --transition-smooth: 0.28s ease;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font: var(--font-body);
            background-color: var(--bg-deep-space);
            color: var(--text-primary);
            line-height: 1.75;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

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

        button,
        input {
            font-family: inherit;
            border: none;
            outline: none;
        }

        button {
            cursor: pointer;
        }

        .container {
            width: 100%;
            max-width: 1260px;
            margin: 0 auto;
            padding: 0 28px;
        }

        /* ========== Top Brand Bar ========== */
        .brand-bar {
            background: #0A0C10;
            border-bottom: 1px solid #1C2333;
            padding: 10px 0;
            font-size: 13px;
            color: var(--text-hint);
        }
        .brand-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
        }
        .brand-logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .brand-logo-icon {
            width: 32px;
            height: 32px;
            background: var(--primary-neon-cyan);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 14px;
            color: #0D1117;
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }
        .brand-logo-text {
            font-weight: 700;
            font-size: 17px;
            color: #fff;
            letter-spacing: 0.3px;
            white-space: nowrap;
        }
        .brand-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
        }
        .brand-actions a {
            color: var(--text-hint);
            transition: color var(--transition-fast);
        }
        .brand-actions a:hover {
            color: var(--primary-neon-cyan);
        }
        .brand-sub-btn {
            background: var(--primary-neon-cyan);
            color: #0D1117;
            padding: 6px 16px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 13px;
            transition: background var(--transition-fast), transform var(--transition-fast);
        }
        .brand-sub-btn:hover {
            background: #00C8E0;
            transform: scale(1.03);
        }
        .brand-sub-btn:active {
            transform: scale(0.98);
        }

        /* ========== Channel Nav ========== */
        .channel-nav-wrap {
            background: #0D1117;
            border-bottom: 1px solid var(--border-subtle);
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }
        .channel-row {
            display: flex;
            align-items: center;
            gap: 4px;
            overflow-x: auto;
            padding: 8px 0;
            scrollbar-width: thin;
            scrollbar-color: #2A2E38 transparent;
            -webkit-overflow-scrolling: touch;
        }
        .channel-row::-webkit-scrollbar {
            height: 4px;
        }
        .channel-row::-webkit-scrollbar-track {
            background: transparent;
        }
        .channel-row::-webkit-scrollbar-thumb {
            background: #2A2E38;
            border-radius: 4px;
        }
        .channel-tag {
            display: inline-block;
            padding: 9px 18px;
            border-radius: 6px;
            font-size: 14.5px;
            font-weight: 500;
            color: var(--text-hint);
            white-space: nowrap;
            transition: all var(--transition-fast);
            position: relative;
            letter-spacing: 0.2px;
        }
        .channel-tag:hover {
            color: var(--primary-neon-cyan);
            background: rgba(0, 229, 255, 0.04);
        }
        .channel-tag.active {
            color: var(--primary-neon-cyan);
            font-weight: 600;
        }
        .channel-tag.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 18px;
            right: 18px;
            height: 3px;
            background: var(--primary-neon-cyan);
            border-radius: 3px 3px 0 0;
        }

        /* Mobile nav toggle */
        .nav-toggle-btn {
            display: none;
            background: none;
            color: #fff;
            font-size: 24px;
            padding: 8px 12px;
            border-radius: 6px;
        }
        .nav-toggle-btn:hover {
            background: var(--bg-card-dark);
        }

        /* ========== Breadcrumb ========== */
        .breadcrumb-row {
            padding: 16px 0;
            font-size: 13px;
            color: var(--text-hint);
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .breadcrumb-row a {
            color: var(--text-hint);
            transition: color var(--transition-fast);
        }
        .breadcrumb-row a:hover {
            color: var(--primary-neon-cyan);
        }
        .breadcrumb-sep {
            color: #3A3E48;
            font-size: 11px;
        }
        .breadcrumb-current {
            color: var(--text-secondary);
        }

        /* ========== Hero Wiki Section ========== */
        .wiki-hero {
            padding: 48px 0 56px;
            background: radial-gradient(ellipse at 30% 20%, rgba(0, 229, 255, 0.06) 0%, transparent 70%),
                radial-gradient(ellipse at 70% 60%, rgba(255, 94, 0, 0.04) 0%, transparent 60%),
                var(--bg-deep-space);
            position: relative;
            overflow: hidden;
        }
        .wiki-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: repeating-linear-gradient(0deg,
                    transparent,
                    transparent 40px,
                    rgba(0, 229, 255, 0.015) 40px,
                    rgba(0, 229, 255, 0.015) 41px);
            pointer-events: none;
        }
        .wiki-hero-content {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 780px;
            margin: 0 auto;
        }
        .wiki-hero-badge {
            display: inline-block;
            background: rgba(0, 229, 255, 0.1);
            color: var(--primary-neon-cyan);
            padding: 5px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.6px;
            margin-bottom: 20px;
        }
        .wiki-hero h1 {
            font: var(--font-h1);
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.4px;
        }
        .wiki-hero h1 span {
            color: var(--primary-neon-cyan);
        }
        .wiki-hero-sub {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 32px;
            line-height: 1.6;
        }
        .wiki-search-wrap {
            position: relative;
            max-width: 560px;
            margin: 0 auto 36px;
        }
        .wiki-search-input {
            width: 100%;
            padding: 15px 52px 15px 20px;
            border-radius: 28px;
            background: var(--bg-card-dark);
            border: 1px solid var(--border-subtle);
            color: #fff;
            font-size: 15px;
            transition: all var(--transition-smooth);
            letter-spacing: 0.2px;
        }
        .wiki-search-input::placeholder {
            color: var(--text-hint);
        }
        .wiki-search-input:focus {
            border-color: var(--primary-neon-cyan);
            box-shadow: var(--shadow-glow-cyan);
            background: var(--bg-card-hover);
        }
        .wiki-search-btn {
            position: absolute;
            right: 6px;
            top: 50%;
            transform: translateY(-50%);
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary-neon-cyan);
            color: #0D1117;
            font-size: 17px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-fast);
            font-weight: 700;
        }
        .wiki-search-btn:hover {
            background: #00C8E0;
            box-shadow: var(--shadow-glow-cyan);
        }

        /* Tag Cloud */
        .wiki-tag-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            max-width: 640px;
            margin: 0 auto;
        }
        .wiki-tag {
            display: inline-block;
            padding: 8px 18px;
            border-radius: 24px;
            font-size: 14px;
            font-weight: 500;
            background: var(--bg-card-dark);
            color: var(--text-secondary);
            border: 1px solid transparent;
            transition: all var(--transition-fast);
            cursor: pointer;
            letter-spacing: 0.2px;
        }
        .wiki-tag:hover {
            border-color: var(--primary-neon-cyan);
            color: var(--primary-neon-cyan);
            background: rgba(0, 229, 255, 0.06);
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.12);
        }
        .wiki-tag.hot-tag {
            background: rgba(255, 94, 0, 0.12);
            color: var(--primary-electric-orange);
            border-color: rgba(255, 94, 0, 0.3);
            font-weight: 600;
        }
        .wiki-tag.hot-tag:hover {
            border-color: var(--primary-electric-orange);
            box-shadow: 0 0 16px rgba(255, 94, 0, 0.2);
            color: #ff7a30;
        }

        /* ========== Section Headings ========== */
        .section-head {
            margin-bottom: 40px;
        }
        .section-head h2 {
            font: var(--font-h2);
            color: #fff;
            margin-bottom: 8px;
            letter-spacing: 0.3px;
        }
        .section-head p {
            color: var(--text-hint);
            font-size: 15px;
        }
        .section-spacing {
            padding: var(--spacing-section) 0;
        }

        /* ========== Featured Terms Grid ========== */
        .terms-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .term-card {
            background: var(--bg-card-dark);
            border-radius: var(--radius-brand);
            padding: 28px 24px;
            border: 1px solid transparent;
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
            gap: 14px;
            position: relative;
            overflow: hidden;
        }
        .term-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--primary-neon-cyan);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform var(--transition-smooth);
        }
        .term-card:hover {
            border-color: var(--border-subtle);
            box-shadow: var(--shadow-hover);
            background: var(--bg-card-hover);
            transform: translateY(-2px);
        }
        .term-card:hover::before {
            transform: scaleX(1);
        }
        .term-card-img {
            width: 100%;
            height: 140px;
            border-radius: 8px;
            object-fit: cover;
            background: #161B22;
        }
        .term-card h3 {
            font: var(--font-h3);
            color: #fff;
            letter-spacing: 0.2px;
        }
        .term-card .term-badge {
            display: inline-block;
            padding: 3px 10px;
            border-radius: 14px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(0, 229, 255, 0.1);
            color: var(--primary-neon-cyan);
            align-self: flex-start;
        }
        .term-card p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.65;
            flex-grow: 1;
        }
        .term-card .term-link {
            color: var(--primary-neon-cyan);
            font-weight: 600;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap var(--transition-fast);
        }
        .term-card .term-link:hover {
            gap: 8px;
        }

        /* ========== Info List Section ========== */
        .info-list-section {
            background: #0A0C10;
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }
        .info-list-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .info-list-item {
            display: flex;
            gap: 16px;
            padding: 18px;
            border-radius: var(--radius-brand);
            background: var(--bg-card-dark);
            border: 1px solid transparent;
            transition: all var(--transition-smooth);
            cursor: pointer;
            align-items: flex-start;
        }
        .info-list-item:hover {
            border-color: var(--primary-neon-cyan);
            background: var(--bg-card-hover);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.1);
        }
        .info-list-thumb {
            width: 72px;
            height: 72px;
            border-radius: 8px;
            object-fit: cover;
            flex-shrink: 0;
            background: #161B22;
        }
        .info-list-body {
            flex: 1;
            min-width: 0;
        }
        .info-list-body h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 6px;
            letter-spacing: 0.2px;
        }
        .info-list-body p {
            font-size: 13.5px;
            color: var(--text-hint);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .info-list-meta {
            font-size: 12px;
            color: var(--primary-neon-cyan);
            margin-top: 6px;
            font-weight: 500;
        }

        /* ========== Topic Recommend ========== */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .topic-card {
            background: var(--bg-card-dark);
            border-radius: var(--radius-brand);
            overflow: hidden;
            transition: all var(--transition-smooth);
            border: 1px solid transparent;
        }
        .topic-card:hover {
            border-color: var(--border-subtle);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .topic-card-img {
            width: 100%;
            height: 130px;
            object-fit: cover;
            background: #161B22;
        }
        .topic-card-body {
            padding: 18px;
        }
        .topic-card-body h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 6px;
            letter-spacing: 0.2px;
        }
        .topic-card-body p {
            font-size: 13px;
            color: var(--text-hint);
            line-height: 1.5;
        }
        .topic-card-tags {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
            margin-top: 10px;
        }
        .topic-card-tags span {
            font-size: 11px;
            padding: 3px 10px;
            border-radius: 12px;
            background: rgba(0, 229, 255, 0.08);
            color: var(--primary-neon-cyan);
            font-weight: 500;
        }

        /* ========== FAQ Accordion ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
            max-width: 860px;
        }
        .faq-item {
            background: var(--bg-card-dark);
            border-radius: var(--radius-brand);
            overflow: hidden;
            border: 1px solid transparent;
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: #2A2E38;
        }
        .faq-item.open {
            border-color: var(--primary-neon-cyan);
            box-shadow: 0 0 18px rgba(0, 229, 255, 0.08);
        }
        .faq-question {
            width: 100%;
            text-align: left;
            background: none;
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            padding: 18px 20px;
            display: flex;
            align-items: center;
            gap: 12px;
            cursor: pointer;
            letter-spacing: 0.2px;
            transition: background var(--transition-fast);
        }
        .faq-question:hover {
            background: rgba(255, 255, 255, 0.015);
        }
        .faq-icon {
            width: 20px;
            height: 20px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-neon-cyan);
            font-size: 14px;
            transition: transform var(--transition-fast);
            font-weight: 700;
        }
        .faq-item.open .faq-icon {
            transform: rotate(90deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 20px;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px;
        }
        .faq-answer p {
            color: var(--text-secondary);
            font-size: 14.5px;
            line-height: 1.7;
        }

        /* ========== CTA Banner ========== */
        .cta-banner {
            background: linear-gradient(135deg, rgba(0, 229, 255, 0.07) 0%, rgba(0, 200, 224, 0.03) 100%);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 44px 40px;
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
        }
        .cta-banner h3 {
            font-size: 22px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 10px;
            letter-spacing: 0.3px;
        }
        .cta-banner p {
            color: var(--text-secondary);
            margin-bottom: 24px;
            font-size: 15px;
        }
        .cta-btn-group {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn-primary {
            background: var(--primary-neon-cyan);
            color: #0D1117;
            padding: 13px 28px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 15px;
            letter-spacing: 0.3px;
            transition: all var(--transition-fast);
            display: inline-block;
        }
        .btn-primary:hover {
            background: #00C8E0;
            box-shadow: var(--shadow-glow-cyan);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: scale(0.98);
        }
        .btn-secondary {
            background: transparent;
            color: var(--primary-neon-cyan);
            padding: 13px 28px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            border: 1px solid var(--primary-neon-cyan);
            letter-spacing: 0.3px;
            transition: all var(--transition-fast);
            display: inline-block;
        }
        .btn-secondary:hover {
            background: rgba(0, 229, 255, 0.08);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.15);
        }

        /* ========== Footer ========== */
        .site-footer {
            background: #0A0C10;
            border-top: 1px solid var(--primary-neon-cyan);
            padding: 48px 0 28px;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 36px;
            margin-bottom: 36px;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul li a {
            font-size: 13px;
            color: var(--text-hint);
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--primary-neon-cyan);
        }
        .footer-bottom {
            text-align: center;
            font-size: 12px;
            color: var(--text-hint);
            border-top: 1px solid #1C2333;
            padding-top: 24px;
            line-height: 2;
        }
        .footer-bottom a {
            color: var(--text-hint);
            transition: color var(--transition-fast);
        }
        .footer-bottom a:hover {
            color: var(--primary-neon-cyan);
        }
        .footer-sep {
            margin: 0 8px;
            color: #3A3E48;
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .terms-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .topic-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .info-list-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 28px;
            }
            :root {
                --spacing-section: 72px;
            }
            .wiki-hero h1 {
                font-size: 34px;
            }
            .section-head h2 {
                font-size: 24px;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
            .brand-bar .container {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .brand-actions {
                width: 100%;
                justify-content: flex-end;
            }
            .channel-row {
                gap: 2px;
                padding: 6px 0;
            }
            .channel-tag {
                padding: 7px 12px;
                font-size: 13px;
                border-radius: 4px;
            }
            .channel-tag.active::after {
                left: 12px;
                right: 12px;
                height: 3px;
                bottom: 1px;
            }
            .terms-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .topic-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .info-list-grid {
                grid-template-columns: 1fr;
            }
            .wiki-hero {
                padding: 32px 0 40px;
            }
            .wiki-hero h1 {
                font-size: 28px;
            }
            .wiki-hero-sub {
                font-size: 14px;
            }
            .wiki-tag-cloud {
                gap: 8px;
            }
            .wiki-tag {
                padding: 6px 14px;
                font-size: 12px;
            }
            .section-head h2 {
                font-size: 22px;
            }
            .cta-banner {
                padding: 28px 20px;
            }
            .cta-banner h3 {
                font-size: 18px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            :root {
                --spacing-section: 52px;
            }
            .nav-toggle-btn {
                display: inline-block;
            }
            .channel-row.collapsed-mobile {
                display: none;
            }
            .channel-row.mobile-open {
                display: flex;
                flex-direction: column;
                align-items: stretch;
                gap: 2px;
                padding: 8px 0;
            }
            .channel-row.mobile-open .channel-tag {
                border-radius: 0;
                padding: 10px 16px;
            }
        }

        @media (max-width: 520px) {
            .topic-grid {
                grid-template-columns: 1fr;
            }
            .terms-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .wiki-hero h1 {
                font-size: 24px;
            }
            .wiki-search-input {
                font-size: 14px;
                padding: 13px 44px 13px 16px;
            }
            .cta-btn-group {
                flex-direction: column;
                align-items: center;
            }
            .btn-primary,
            .btn-secondary {
                width: 100%;
                text-align: center;
            }
            .breadcrumb-row {
                font-size: 12px;
            }
        }

/* roulang page: category3 */
:root {
            --primary-neon-cyan: #00E5FF;
            --primary-cyan-deeper: #00C8E0;
            --primary-electric-orange: #FF5E00;
            --bg-deep-space: #0D1117;
            --bg-card-dark: #1C2333;
            --bg-card-hover: #252D3F;
            --bg-surface: #161B22;
            --text-primary: #FFFFFF;
            --text-secondary: #B0B8C4;
            --text-hint: #6E7681;
            --border-subtle: #2A2E38;
            --border-cyan-glow: rgba(0, 229, 255, 0.35);
            --radius-data: 4px;
            --radius-brand: 12px;
            --radius-btn: 8px;
            --radius-card: 10px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
            --shadow-hover: 0 8px 32px rgba(0, 229, 255, 0.2);
            --shadow-glow-cyan: 0 0 20px rgba(0, 229, 255, 0.12);
            --font-h1: 600 42px/1.2 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-h2: 600 28px/1.3 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-h3: 500 18px/1.4 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-body: 400 15px/1.75 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            --font-data: 400 15px 'SF Mono', 'Fira Code', 'Consolas', monospace;
            --spacing-section: 100px;
            --spacing-block: 64px;
            --spacing-mobile-section: 56px;
            --transition-fast: 0.18s ease;
            --transition-smooth: 0.28s ease;
            --container-max: 1240px;
            --container-narrow: 960px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font: var(--font-body);
            background-color: var(--bg-deep-space);
            color: var(--text-secondary);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            letter-spacing: 0.01em;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--primary-neon-cyan);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
            transition: all var(--transition-smooth);
        }
        button:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--primary-neon-cyan);
            outline-offset: 3px;
            border-radius: 3px;
        }
        input {
            font-family: inherit;
            outline: none;
            border: none;
            transition: border var(--transition-fast), box-shadow var(--transition-fast);
        }
        ul {
            list-style: none;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-narrow {
            max-width: var(--container-narrow);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== BRAND BAR ===== */
        .brand-bar {
            background: #0A0C10;
            border-bottom: 1px solid var(--border-subtle);
            padding: 0 24px;
            height: 52px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            position: sticky;
            top: 0;
            z-index: 1000;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.03em;
            white-space: nowrap;
        }
        .brand-logo .logo-icon {
            width: 32px;
            height: 32px;
            border-radius: 6px;
            background: var(--primary-neon-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0D1117;
            font-weight: 900;
            font-size: 16px;
            flex-shrink: 0;
            position: relative;
            overflow: hidden;
        }
        .brand-logo .logo-icon::after {
            content: '';
            position: absolute;
            width: 14px;
            height: 2px;
            background: #0D1117;
            border-radius: 1px;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%) rotate(-30deg);
            animation: logoPulse 2.5s ease-in-out infinite;
        }
        @keyframes logoPulse {
            0%,
            100% {
                opacity: 0.5;
            }
            50% {
                opacity: 1;
            }
        }
        .brand-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .brand-actions .btn-subscribe-sm {
            background: transparent;
            border: 1px solid var(--primary-neon-cyan);
            color: var(--primary-neon-cyan);
            padding: 6px 16px;
            border-radius: var(--radius-btn);
            font-size: 13px;
            font-weight: 500;
            white-space: nowrap;
            transition: all var(--transition-smooth);
        }
        .brand-actions .btn-subscribe-sm:hover {
            background: rgba(0, 229, 255, 0.1);
            border-color: #fff;
            color: #fff;
            box-shadow: var(--shadow-glow-cyan);
        }
        .brand-actions .btn-subscribe-sm:active {
            transform: scale(0.97);
        }

        /* ===== CHANNEL ROW ===== */
        .channel-row-wrap {
            background: var(--bg-deep-space);
            border-bottom: 1px solid var(--border-subtle);
            position: sticky;
            top: 52px;
            z-index: 999;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
        }
        .channel-row {
            display: flex;
            align-items: center;
            gap: 4px;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
            height: 44px;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
        }
        .channel-row::-webkit-scrollbar {
            display: none;
        }
        .channel-tag {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: 6px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            position: relative;
            transition: all var(--transition-fast);
            flex-shrink: 0;
            border-bottom: 3px solid transparent;
            margin-bottom: -1px;
        }
        .channel-tag:hover {
            color: var(--primary-neon-cyan);
            background: rgba(0, 229, 255, 0.04);
        }
        .channel-tag.active {
            color: var(--primary-neon-cyan);
            border-bottom-color: var(--primary-neon-cyan);
            font-weight: 600;
            background: rgba(0, 229, 255, 0.03);
        }

        /* Hamburger */
        .hamburger-btn {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 22px;
            padding: 8px;
            cursor: pointer;
            flex-shrink: 0;
        }
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            top: 96px;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(10, 12, 16, 0.97);
            z-index: 998;
            flex-direction: column;
            padding: 24px;
            gap: 4px;
            overflow-y: auto;
        }
        .mobile-nav-overlay.open {
            display: flex;
        }
        .mobile-nav-overlay .channel-tag {
            font-size: 16px;
            padding: 14px 20px;
            border-radius: 8px;
            border-bottom: none;
            margin-bottom: 0;
            width: 100%;
        }

        /* ===== BREADCRUMB ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
            padding: 16px 0 8px;
            font-size: 13px;
            color: var(--text-hint);
        }
        .breadcrumb a {
            color: var(--text-hint);
        }
        .breadcrumb a:hover {
            color: var(--primary-neon-cyan);
        }
        .breadcrumb .sep {
            color: var(--border-subtle);
            font-size: 10px;
        }
        .breadcrumb .current {
            color: var(--primary-neon-cyan);
            font-weight: 500;
        }

        /* ===== HERO - TECH GRID ===== */
        .hero-tech {
            padding: 48px 0 60px;
            position: relative;
            overflow: hidden;
            background: radial-gradient(ellipse at 30% 20%, rgba(0, 229, 255, 0.06) 0%, transparent 65%),
                radial-gradient(ellipse at 70% 60%, rgba(255, 94, 0, 0.03) 0%, transparent 55%),
                var(--bg-deep-space);
        }
        .hero-tech::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image:
                linear-gradient(rgba(0, 229, 255, 0.03) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 229, 255, 0.03) 1px, transparent 1px);
            background-size: 48px 48px;
            pointer-events: none;
            z-index: 0;
            opacity: 0.5;
        }
        .hero-tech-inner {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
            align-items: start;
        }
        .hero-tech-left h1 {
            font: var(--font-h1);
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }
        .hero-tech-left .hero-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 28px;
            line-height: 1.7;
            max-width: 560px;
        }
        .hero-icon-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 12px;
            margin-bottom: 24px;
        }
        .hero-icon-item {
            background: var(--bg-card-dark);
            border-radius: var(--radius-card);
            padding: 18px 14px;
            text-align: center;
            border: 1px solid transparent;
            transition: all var(--transition-smooth);
            cursor: default;
            position: relative;
        }
        .hero-icon-item:hover {
            border-color: var(--border-cyan-glow);
            background: var(--bg-card-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .hero-icon-item .api-icon {
            font-size: 28px;
            color: var(--primary-neon-cyan);
            margin-bottom: 8px;
            display: block;
        }
        .hero-icon-item .api-label {
            font-size: 12px;
            color: var(--text-secondary);
            font-weight: 500;
            letter-spacing: 0.02em;
            line-height: 1.3;
        }
        .hero-icon-item .api-badge {
            position: absolute;
            top: 8px;
            right: 8px;
            font-size: 10px;
            background: var(--primary-electric-orange);
            color: #fff;
            padding: 2px 7px;
            border-radius: 3px;
            font-weight: 600;
            letter-spacing: 0.05em;
        }
        .hero-tech-right {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .hero-doc-card {
            background: var(--bg-card-dark);
            border-radius: var(--radius-brand);
            padding: 28px 24px;
            border: 1px solid var(--border-subtle);
            text-align: center;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        .hero-doc-card::before {
            content: '';
            position: absolute;
            top: -30px;
            right: -30px;
            width: 80px;
            height: 80px;
            background: var(--primary-neon-cyan);
            opacity: 0.06;
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-doc-card:hover {
            border-color: var(--border-cyan-glow);
            box-shadow: var(--shadow-hover);
        }
        .hero-doc-card .doc-icon-big {
            font-size: 42px;
            color: var(--primary-neon-cyan);
            margin-bottom: 12px;
            display: block;
        }
        .hero-doc-card h3 {
            font: var(--font-h3);
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .hero-doc-card p {
            font-size: 13px;
            color: var(--text-hint);
            margin-bottom: 16px;
            line-height: 1.5;
        }
        .hero-doc-card .btn-api-doc {
            display: inline-block;
            background: var(--primary-neon-cyan);
            color: #0D1117;
            padding: 10px 24px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 14px;
            transition: all var(--transition-smooth);
            letter-spacing: 0.02em;
        }
        .hero-doc-card .btn-api-doc:hover {
            background: #fff;
            color: #0D1117;
            box-shadow: 0 0 28px rgba(0, 229, 255, 0.35);
            transform: translateY(-1px);
        }
        .hero-doc-card .btn-api-doc:active {
            transform: scale(0.97);
        }
        .hero-status-strip {
            background: var(--bg-card-dark);
            border-radius: var(--radius-card);
            padding: 14px 18px;
            display: flex;
            align-items: center;
            gap: 10px;
            border: 1px solid var(--border-subtle);
            font-size: 13px;
            color: var(--text-secondary);
        }
        .hero-status-strip .status-dot {
            width: 9px;
            height: 9px;
            border-radius: 50%;
            background: #00E5FF;
            flex-shrink: 0;
            animation: statusPulse 2s ease-in-out infinite;
            box-shadow: 0 0 8px rgba(0, 229, 255, 0.6);
        }
        @keyframes statusPulse {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.35;
            }
        }
        .hero-status-strip .status-text {
            flex: 1;
            line-height: 1.4;
        }
        .hero-status-strip .status-uptime {
            color: var(--primary-neon-cyan);
            font-weight: 600;
            font-family: var(--font-data);
        }

        /* ===== SECTION TITLES ===== */
        .section-header {
            text-align: center;
            margin-bottom: 40px;
        }
        .section-header h2 {
            font: var(--font-h2);
            color: var(--text-primary);
            margin-bottom: 10px;
            letter-spacing: 0.02em;
        }
        .section-header .section-lead {
            font-size: 15px;
            color: var(--text-hint);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }
        .section-divider {
            width: 48px;
            height: 3px;
            background: var(--primary-neon-cyan);
            border-radius: 2px;
            margin: 0 auto 16px;
            opacity: 0.7;
        }

        /* ===== API FEATURE CARDS ===== */
        .section-api-features {
            padding: var(--spacing-section) 0;
        }
        .api-features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .api-feature-card {
            background: var(--bg-card-dark);
            border-radius: var(--radius-brand);
            padding: 28px 22px;
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .api-feature-card:hover {
            border-color: var(--border-cyan-glow);
            background: var(--bg-card-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .api-feature-card .feature-icon-wrap {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-btn);
            background: rgba(0, 229, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary-neon-cyan);
            flex-shrink: 0;
        }
        .api-feature-card h3 {
            font: var(--font-h3);
            color: var(--text-primary);
            margin: 0;
        }
        .api-feature-card p {
            font-size: 14px;
            color: var(--text-hint);
            line-height: 1.6;
            flex: 1;
        }
        .api-feature-card .feature-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-top: 4px;
        }
        .feature-tag {
            font-size: 11px;
            background: rgba(0, 229, 255, 0.1);
            color: var(--primary-neon-cyan);
            padding: 3px 10px;
            border-radius: 3px;
            font-weight: 500;
            letter-spacing: 0.03em;
        }
        .api-feature-card.featured-card {
            border-color: var(--border-cyan-glow);
            background: linear-gradient(160deg, #1C2333 0%, #1a2535 100%);
            box-shadow: var(--shadow-glow-cyan);
        }
        .api-feature-card.featured-card .feature-icon-wrap {
            background: rgba(0, 229, 255, 0.18);
        }

        /* ===== FLOW / PROCESS ===== */
        .section-flow {
            padding: var(--spacing-section) 0;
            background: var(--bg-surface);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }
        .flow-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            counter-reset: flowStep;
        }
        .flow-step {
            background: var(--bg-card-dark);
            border-radius: var(--radius-brand);
            padding: 24px 20px;
            text-align: center;
            border: 1px solid var(--border-subtle);
            position: relative;
            transition: all var(--transition-smooth);
        }
        .flow-step:hover {
            border-color: var(--border-cyan-glow);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .flow-step .step-number {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--primary-neon-cyan);
            color: #0D1117;
            font-weight: 700;
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            flex-shrink: 0;
        }
        .flow-step h3 {
            font: var(--font-h3);
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .flow-step p {
            font-size: 13px;
            color: var(--text-hint);
            line-height: 1.5;
        }

        /* ===== TECH SPECS ===== */
        .section-specs {
            padding: var(--spacing-section) 0;
        }
        .specs-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }
        .spec-card {
            background: var(--bg-card-dark);
            border-radius: var(--radius-data);
            padding: 18px 16px;
            border: 1px solid var(--border-subtle);
            display: flex;
            align-items: center;
            gap: 14px;
            transition: all var(--transition-fast);
        }
        .spec-card:hover {
            border-color: var(--border-cyan-glow);
            background: var(--bg-card-hover);
        }
        .spec-card .spec-icon {
            font-size: 20px;
            color: var(--primary-neon-cyan);
            flex-shrink: 0;
            width: 36px;
            text-align: center;
        }
        .spec-card .spec-info .spec-value {
            font-family: var(--font-data);
            font-weight: 600;
            color: var(--primary-neon-cyan);
            font-size: 20px;
            line-height: 1.2;
        }
        .spec-card .spec-info .spec-label {
            font-size: 12px;
            color: var(--text-hint);
            margin-top: 2px;
        }

        /* ===== UPDATE LOG CARDS ===== */
        .section-updates {
            padding: var(--spacing-section) 0;
            background: var(--bg-surface);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }
        .updates-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }
        .update-card {
            background: var(--bg-card-dark);
            border-radius: var(--radius-card);
            padding: 20px 18px;
            border: 1px solid var(--border-subtle);
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .update-card:hover {
            border-color: var(--border-cyan-glow);
            box-shadow: var(--shadow-hover);
            background: var(--bg-card-hover);
        }
        .update-card .update-date {
            font-size: 11px;
            color: var(--primary-neon-cyan);
            font-weight: 500;
            letter-spacing: 0.04em;
        }
        .update-card h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.4;
        }
        .update-card p {
            font-size: 13px;
            color: var(--text-hint);
            line-height: 1.6;
            flex: 1;
        }
        .update-card .update-link {
            font-size: 13px;
            color: var(--primary-neon-cyan);
            font-weight: 500;
            align-self: flex-start;
            transition: all var(--transition-fast);
        }
        .update-card .update-link:hover {
            color: #fff;
            text-decoration: underline;
            text-underline-offset: 4px;
        }
        .update-badge-new {
            display: inline-block;
            font-size: 10px;
            background: var(--primary-neon-cyan);
            color: #0D1117;
            padding: 2px 8px;
            border-radius: 3px;
            font-weight: 700;
            margin-left: 6px;
            vertical-align: middle;
            letter-spacing: 0.04em;
        }

        /* ===== SCENARIO CARDS ===== */
        .section-scenarios {
            padding: var(--spacing-section) 0;
        }
        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .scenario-card {
            background: var(--bg-card-dark);
            border-radius: var(--radius-brand);
            padding: 28px 24px;
            border: 1px solid var(--border-subtle);
            display: flex;
            gap: 18px;
            align-items: flex-start;
            transition: all var(--transition-smooth);
        }
        .scenario-card:hover {
            border-color: var(--border-cyan-glow);
            box-shadow: var(--shadow-hover);
            background: var(--bg-card-hover);
        }
        .scenario-card .sc-img {
            width: 72px;
            height: 72px;
            border-radius: var(--radius-btn);
            object-fit: cover;
            flex-shrink: 0;
            background: var(--bg-surface);
        }
        .scenario-card .sc-info h3 {
            font: var(--font-h3);
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .scenario-card .sc-info p {
            font-size: 13px;
            color: var(--text-hint);
            line-height: 1.6;
        }

        /* ===== FAQ ===== */
        .section-faq {
            padding: var(--spacing-section) 0;
            background: var(--bg-surface);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 6px;
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card-dark);
            border-radius: var(--radius-card);
            border: 1px solid var(--border-subtle);
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: #3a3f4a;
        }
        .faq-item summary {
            padding: 18px 44px 18px 20px;
            cursor: pointer;
            font-weight: 500;
            font-size: 16px;
            color: var(--text-primary);
            list-style: none;
            position: relative;
            user-select: none;
            line-height: 1.4;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '';
            position: absolute;
            right: 20px;
            top: 50%;
            transform: translateY(-50%) rotate(0deg);
            width: 10px;
            height: 10px;
            border-right: 2px solid var(--primary-neon-cyan);
            border-bottom: 2px solid var(--primary-neon-cyan);
            transition: transform var(--transition-smooth);
            opacity: 0.8;
        }
        .faq-item[open] summary::after {
            transform: translateY(-25%) rotate(225deg);
        }
        .faq-item[open] summary {
            background: rgba(0, 229, 255, 0.03);
            border-bottom: 1px solid var(--border-subtle);
        }
        .faq-item .faq-answer {
            padding: 16px 20px 20px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            background: rgba(0, 0, 0, 0.15);
        }
        .faq-diamond {
            display: inline-block;
            width: 8px;
            height: 8px;
            background: var(--primary-neon-cyan);
            transform: rotate(45deg);
            flex-shrink: 0;
            border-radius: 1px;
            opacity: 0.9;
            transition: transform var(--transition-smooth);
        }
        .faq-item[open] .faq-diamond {
            transform: rotate(135deg);
        }

        /* ===== CTA BANNER ===== */
        .section-cta-banner {
            padding: 60px 0;
            text-align: center;
        }
        .cta-banner-inner {
            background: var(--bg-card-dark);
            border-radius: var(--radius-brand);
            padding: 48px 32px;
            border: 1px solid var(--border-subtle);
            position: relative;
            overflow: hidden;
            max-width: 760px;
            margin: 0 auto;
        }
        .cta-banner-inner::before {
            content: '';
            position: absolute;
            top: -60px;
            left: -60px;
            width: 160px;
            height: 160px;
            background: var(--primary-neon-cyan);
            opacity: 0.04;
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-banner-inner h2 {
            font: var(--font-h2);
            color: var(--text-primary);
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }
        .cta-banner-inner p {
            color: var(--text-secondary);
            margin-bottom: 24px;
            position: relative;
            z-index: 1;
            font-size: 15px;
            line-height: 1.6;
        }
        .cta-banner-inner .btn-cta-primary {
            display: inline-block;
            background: var(--primary-neon-cyan);
            color: #0D1117;
            padding: 12px 32px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            font-size: 15px;
            letter-spacing: 0.02em;
            transition: all var(--transition-smooth);
            position: relative;
            z-index: 1;
        }
        .cta-banner-inner .btn-cta-primary:hover {
            background: #fff;
            box-shadow: 0 0 32px rgba(0, 229, 255, 0.4);
            transform: translateY(-2px);
        }
        .cta-banner-inner .btn-cta-primary:active {
            transform: scale(0.97);
        }
        .cta-banner-inner .btn-cta-secondary {
            display: inline-block;
            background: transparent;
            border: 1px solid var(--primary-neon-cyan);
            color: var(--primary-neon-cyan);
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-weight: 500;
            font-size: 14px;
            letter-spacing: 0.02em;
            margin-left: 12px;
            transition: all var(--transition-smooth);
            position: relative;
            z-index: 1;
        }
        .cta-banner-inner .btn-cta-secondary:hover {
            background: rgba(0, 229, 255, 0.1);
            border-color: #fff;
            color: #fff;
            box-shadow: var(--shadow-glow-cyan);
        }

        /* ===== FOOTER ===== */
        .site-footer {
            background: #0A0C10;
            border-top: 1px solid var(--primary-neon-cyan);
            padding: 48px 0 32px;
            margin-top: auto;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-bottom: 36px;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.03em;
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul li a {
            font-size: 13px;
            color: var(--text-hint);
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: var(--primary-neon-cyan);
        }
        .footer-bottom {
            text-align: center;
            font-size: 12px;
            color: var(--text-hint);
            border-top: 1px solid var(--border-subtle);
            padding-top: 24px;
            line-height: 2;
        }
        .footer-bottom a {
            color: var(--text-hint);
            font-size: 12px;
        }
        .footer-bottom a:hover {
            color: var(--primary-neon-cyan);
        }
        .footer-sep {
            margin: 0 8px;
            color: var(--border-subtle);
        }

        /* ===== RESPONSIVE ===== */
        @media (max-width: 1200px) {
            .hero-icon-grid {
                grid-template-columns: repeat(4, 1fr);
                gap: 10px;
            }
            .api-features-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .flow-steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .specs-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 12px;
            }
            .updates-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
            .scenarios-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .hero-tech-inner {
                grid-template-columns: 1fr 280px;
                gap: 28px;
            }
        }

        @media (max-width: 1024px) {
            :root {
                --spacing-section: 72px;
            }
            .hero-tech-inner {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .hero-tech-right {
                flex-direction: row;
                gap: 16px;
            }
            .hero-doc-card {
                flex: 1;
            }
            .hero-status-strip {
                flex: 1;
            }
            .hero-icon-grid {
                grid-template-columns: repeat(4, 1fr);
            }
            .api-features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .specs-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .updates-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .scenarios-grid {
                grid-template-columns: 1fr;
            }
            h1 {
                font-size: 34px !important;
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacing-section: 56px;
            }
            .hamburger-btn {
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .channel-row {
                gap: 0;
                padding: 0 12px;
            }
            .channel-row .channel-tag {
                display: none;
            }
            .channel-row .channel-tag.active {
                display: inline-flex;
            }
            .channel-row .hamburger-btn {
                display: flex;
            }
            .hero-icon-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
            .hero-tech-right {
                flex-direction: column;
                gap: 14px;
            }
            .api-features-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .flow-steps {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .specs-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }
            .updates-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .scenarios-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
            .cta-banner-inner {
                padding: 32px 20px;
            }
            .cta-banner-inner .btn-cta-secondary {
                margin-left: 0;
                margin-top: 10px;
            }
            h1 {
                font-size: 28px !important;
            }
            h2 {
                font-size: 22px !important;
            }
            .brand-logo {
                font-size: 16px;
            }
            .brand-logo .logo-icon {
                width: 26px;
                height: 26px;
                font-size: 13px;
            }
            .brand-actions .btn-subscribe-sm {
                font-size: 11px;
                padding: 5px 12px;
            }
            .brand-bar {
                height: 44px;
                padding: 0 14px;
            }
            .channel-row-wrap {
                top: 44px;
            }
            .mobile-nav-overlay {
                top: 88px;
            }
            .container {
                padding: 0 16px;
            }
            .container-narrow {
                padding: 0 16px;
            }
            .section-header {
                margin-bottom: 28px;
            }
            .hero-tech {
                padding: 32px 0 40px;
            }
            .hero-tech-left .hero-subtitle {
                font-size: 14px;
                margin-bottom: 20px;
            }
            .hero-icon-item {
                padding: 14px 10px;
            }
            .hero-icon-item .api-icon {
                font-size: 22px;
            }
            .hero-icon-item .api-label {
                font-size: 11px;
            }
            .faq-item summary {
                font-size: 14px;
                padding: 14px 38px 14px 16px;
            }
            .faq-item .faq-answer {
                font-size: 13px;
                padding: 12px 16px 16px;
            }
        }

        @media (max-width: 520px) {
            :root {
                --spacing-section: 44px;
            }
            .hero-icon-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 8px;
            }
            .specs-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .flow-steps {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .brand-logo {
                font-size: 14px;
            }
            h1 {
                font-size: 24px !important;
            }
            h2 {
                font-size: 20px !important;
            }
            .cta-banner-inner .btn-cta-primary,
            .cta-banner-inner .btn-cta-secondary {
                display: block;
                width: 100%;
                text-align: center;
                margin: 0 0 8px;
            }
            .scenario-card {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }
            .scenario-card .sc-img {
                width: 56px;
                height: 56px;
            }
        }