/* roulang page: index */
/* ============ 设计变量 ============ */
        :root {
            --color-primary: #1B3A5C;
            --color-primary-dark: #0F2840;
            --color-primary-light: #2A5580;
            --color-accent: #D4940E;
            --color-accent-hover: #B87D0A;
            --color-accent-light: #F5E6C8;
            --color-highlight: #3B7DD8;
            --color-highlight-light: #E8F1FB;
            --color-success: #2D8B4E;
            --color-bg: #F4F5F7;
            --color-bg-alt: #EDEFF2;
            --color-card: #FFFFFF;
            --color-text: #1A1A2E;
            --color-text-medium: #4A5568;
            --color-text-light: #8899AA;
            --color-text-muted: #A0AEC0;
            --color-border: #E2E8F0;
            --color-border-light: #EDF2F7;
            --color-footer: #0F1C2E;
            --color-footer-text: #B0BDCC;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 50px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.04);
            --shadow-lg: 0 10px 32px rgba(0,0,0,0.10), 0 4px 12px rgba(0,0,0,0.05);
            --shadow-xl: 0 20px 48px rgba(0,0,0,0.12), 0 8px 20px rgba(0,0,0,0.06);
            --shadow-card-hover: 0 12px 36px rgba(0,0,0,0.12), 0 4px 14px rgba(0,0,0,0.06);
            --transition-fast: 0.15s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.35s ease;
            --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --max-width: 1200px;
            --nav-height: 72px;
            --section-gap: 80px;
            --section-gap-sm: 56px;
        }

        /* ============ 基础 Reset/Base ============ */
        *, *::before, *::after {
            box-sizing: border-box;
        }

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

        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            margin: 0;
            padding: 0;
            overflow-x: hidden;
            min-width: 320px;
        }

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

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

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

        button:focus-visible, input:focus-visible {
            outline: 2px solid var(--color-highlight);
            outline-offset: 2px;
        }

        h1, h2, h3, h4, h5, h6 {
            color: var(--color-text);
            line-height: 1.3;
            margin-top: 0;
        }

        ul, ol {
            padding-left: 0;
            list-style: none;
            margin: 0;
        }

        /* ============ 容器 ============ */
        .site-container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        @media (max-width: 640px) {
            .site-container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ============ Header / 导航 ============ */
        .site-header {
            background: #FFFFFF;
            border-bottom: 1px solid var(--color-border);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: var(--shadow-sm);
            height: auto;
            min-height: var(--nav-height);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 12px 20px;
            gap: 12px;
        }
        @media (max-width: 768px) {
            .header-inner {
                padding: 10px 16px;
                gap: 10px;
            }
        }

        /* Logo */
        .site-logo {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--color-primary);
            white-space: nowrap;
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
            transition: color var(--transition-fast);
        }
        .site-logo:hover {
            color: var(--color-primary-dark);
        }
        .site-logo .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: var(--color-primary);
            color: #FFFFFF;
            border-radius: var(--radius-md);
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        @media (max-width: 520px) {
            .site-logo {
                font-size: 1rem;
            }
            .site-logo .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 0.95rem;
                border-radius: var(--radius-sm);
            }
        }

        /* 导航搜索框 - 视觉中心 */
        .nav-search-wrap {
            flex: 1;
            min-width: 240px;
            max-width: 480px;
            position: relative;
        }
        @media (max-width: 768px) {
            .nav-search-wrap {
                order: 3;
                flex-basis: 100%;
                max-width: 100%;
                min-width: 0;
            }
        }
        .nav-search-form {
            display: flex;
            align-items: center;
            background: var(--color-bg);
            border: 2px solid var(--color-border);
            border-radius: var(--radius-full);
            overflow: hidden;
            transition: all var(--transition-base);
            position: relative;
        }
        .nav-search-form:focus-within {
            border-color: var(--color-highlight);
            box-shadow: 0 0 0 4px rgba(59,125,216,0.10);
            background: #FFFFFF;
        }
        .nav-search-form .search-icon-btn {
            background: none;
            border: none;
            color: var(--color-text-light);
            padding: 10px 8px 10px 16px;
            cursor: pointer;
            font-size: 1rem;
            transition: color var(--transition-fast);
            flex-shrink: 0;
            line-height: 1;
        }
        .nav-search-form:focus-within .search-icon-btn {
            color: var(--color-highlight);
        }
        .nav-search-input {
            flex: 1;
            border: none;
            background: transparent;
            padding: 10px 8px;
            font-size: 0.95rem;
            color: var(--color-text);
            outline: none;
            min-width: 0;
        }
        .nav-search-input::placeholder {
            color: var(--color-text-muted);
        }
        .nav-search-submit {
            background: var(--color-highlight);
            color: #FFFFFF;
            border: none;
            padding: 10px 20px;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.9rem;
            white-space: nowrap;
            transition: background var(--transition-fast);
            flex-shrink: 0;
            border-radius: 0 var(--radius-full) var(--radius-full) 0;
            margin: -2px -2px -2px 0;
        }
        .nav-search-submit:hover {
            background: var(--color-primary);
        }
        @media (max-width: 520px) {
            .nav-search-submit {
                padding: 10px 14px;
                font-size: 0.82rem;
            }
            .nav-search-input {
                font-size: 0.88rem;
            }
        }

        /* 导航链接 */
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-shrink: 0;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--color-text-medium);
            border-radius: var(--radius-full);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .nav-link:hover {
            color: var(--color-primary);
            background: var(--color-bg-alt);
        }
        .nav-link.active {
            color: var(--color-highlight);
            background: var(--color-highlight-light);
            font-weight: 600;
        }
        @media (max-width: 768px) {
            .nav-links {
                gap: 2px;
            }
            .nav-link {
                padding: 6px 12px;
                font-size: 0.88rem;
            }
        }
        @media (max-width: 520px) {
            .nav-links {
                gap: 0;
            }
            .nav-link {
                padding: 6px 10px;
                font-size: 0.82rem;
            }
        }

        /* ============ 板块通用 ============ */
        .section {
            padding: var(--section-gap) 0;
        }
        @media (max-width: 768px) {
            .section {
                padding: var(--section-gap-sm) 0;
            }
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header .section-tag {
            display: inline-block;
            font-size: 0.82rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: var(--color-highlight);
            background: var(--color-highlight-light);
            padding: 5px 14px;
            border-radius: var(--radius-full);
            margin-bottom: 12px;
        }
        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-text);
        }
        .section-header .section-subtitle {
            font-size: 1.05rem;
            color: var(--color-text-light);
            max-width: 560px;
            margin: 0 auto;
        }
        @media (max-width: 768px) {
            .section-header h2 {
                font-size: 1.55rem;
            }
            .section-header .section-subtitle {
                font-size: 0.95rem;
            }
        }

        /* ============ Hero 首屏 ============ */
        .hero-section {
            background: linear-gradient(170deg, #FFFFFF 0%, #F8FAFB 40%, #EDF2F8 100%);
            padding: 72px 0 80px;
            position: relative;
            overflow: hidden;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 48px 0 56px;
            }
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -180px;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(59,125,216,0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: -140px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(212,148,14,0.05) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 1;
        }
        @media (max-width: 900px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
                text-align: center;
            }
        }
        .hero-content h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            color: var(--color-text);
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .hero-content h1 .highlight {
            color: var(--color-highlight);
            position: relative;
        }
        .hero-content .hero-desc {
            font-size: 1.12rem;
            color: var(--color-text-medium);
            margin-bottom: 28px;
            line-height: 1.65;
            max-width: 500px;
        }
        @media (max-width: 900px) {
            .hero-content .hero-desc {
                max-width: 100%;
                margin-left: auto;
                margin-right: auto;
            }
        }
        @media (max-width: 768px) {
            .hero-content h1 {
                font-size: 2rem;
            }
            .hero-content .hero-desc {
                font-size: 1rem;
            }
        }
        @media (max-width: 520px) {
            .hero-content h1 {
                font-size: 1.6rem;
            }
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        @media (max-width: 900px) {
            .hero-actions {
                justify-content: center;
            }
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            padding: 13px 28px;
            font-weight: 600;
            font-size: 1rem;
            border-radius: var(--radius-full);
            border: none;
            cursor: pointer;
            transition: all var(--transition-base);
            white-space: nowrap;
            letter-spacing: 0.2px;
            line-height: 1.4;
        }
        .btn-primary {
            background: var(--color-highlight);
            color: #FFFFFF;
            box-shadow: 0 4px 14px rgba(59,125,216,0.30);
        }
        .btn-primary:hover {
            background: #2C6DC8;
            box-shadow: 0 6px 20px rgba(59,125,216,0.40);
            transform: translateY(-1px);
            color: #FFFFFF;
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(59,125,216,0.25);
        }
        .btn-outline {
            background: #FFFFFF;
            color: var(--color-primary);
            border: 2px solid var(--color-border);
            box-shadow: var(--shadow-sm);
        }
        .btn-outline:hover {
            border-color: var(--color-primary);
            color: var(--color-primary-dark);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }
        .btn-accent {
            background: var(--color-accent);
            color: #FFFFFF;
            box-shadow: 0 4px 14px rgba(212,148,14,0.30);
        }
        .btn-accent:hover {
            background: var(--color-accent-hover);
            box-shadow: 0 6px 20px rgba(212,148,14,0.40);
            transform: translateY(-1px);
            color: #FFFFFF;
        }
        @media (max-width: 520px) {
            .btn {
                padding: 11px 22px;
                font-size: 0.9rem;
            }
        }
        .hero-visual {
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }
        .hero-card-stack {
            position: relative;
            width: 100%;
            max-width: 420px;
        }
        .hero-main-card {
            background: #FFFFFF;
            border-radius: var(--radius-xl);
            padding: 32px 28px;
            box-shadow: var(--shadow-xl);
            text-align: center;
            position: relative;
            z-index: 2;
            border: 1px solid var(--color-border-light);
        }
        .hero-main-card .live-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #E53E3E;
            color: #FFFFFF;
            font-weight: 700;
            font-size: 0.85rem;
            padding: 6px 14px;
            border-radius: var(--radius-full);
            margin-bottom: 16px;
            animation: pulse-live 2s infinite;
        }
        @keyframes pulse-live {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.75; }
        }
        .live-dot {
            width: 8px;
            height: 8px;
            background: #FFFFFF;
            border-radius: 50%;
            display: inline-block;
        }
        .hero-main-card .match-teams {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 6px;
        }
        .hero-main-card .match-info {
            font-size: 0.9rem;
            color: var(--color-text-light);
        }
        .hero-float-card {
            position: absolute;
            background: #FFFFFF;
            border-radius: var(--radius-md);
            padding: 14px 18px;
            box-shadow: var(--shadow-lg);
            z-index: 1;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--color-text);
            border: 1px solid var(--color-border-light);
        }
        .hero-float-card.top-right {
            top: -16px;
            right: -10px;
            z-index: 3;
        }
        .hero-float-card.bottom-left {
            bottom: -18px;
            left: -8px;
            z-index: 3;
        }
        @media (max-width: 900px) {
            .hero-visual {
                display: none;
            }
        }

        /* ============ 板块：直播观看方式 ============ */
        .services-section {
            background: #FFFFFF;
        }
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        @media (max-width: 900px) {
            .services-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 560px) {
            .services-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }
        .service-card {
            background: var(--color-bg);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            transition: all var(--transition-slow);
            border: 1px solid transparent;
            position: relative;
            overflow: hidden;
        }
        .service-card:hover {
            background: #FFFFFF;
            border-color: var(--color-border);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .service-card .service-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 60px;
            height: 60px;
            border-radius: var(--radius-md);
            background: var(--color-highlight-light);
            color: var(--color-highlight);
            font-size: 1.5rem;
            margin-bottom: 18px;
            transition: all var(--transition-base);
        }
        .service-card:hover .service-icon {
            background: var(--color-highlight);
            color: #FFFFFF;
        }
        .service-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-text);
        }
        .service-card p {
            font-size: 0.93rem;
            color: var(--color-text-light);
            margin: 0;
            line-height: 1.6;
        }

        /* ============ 板块：赛事资讯 ============ */
        .news-section {
            background: var(--color-bg);
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        @media (max-width: 900px) {
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 560px) {
            .news-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }
        .news-card {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
            border: 1px solid var(--color-border-light);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-3px);
        }
        .news-card-image {
            height: 180px;
            background: linear-gradient(135deg, #E8EDF4 0%, #D5DFEA 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2.5rem;
            color: var(--color-text-muted);
            position: relative;
            overflow: hidden;
        }
        .news-card-image .news-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--color-accent);
            color: #FFFFFF;
            font-size: 0.78rem;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            letter-spacing: 0.5px;
        }
        .news-card-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
            line-height: 1.4;
            color: var(--color-text);
        }
        .news-card-body .news-date {
            font-size: 0.82rem;
            color: var(--color-text-muted);
            margin-bottom: 8px;
        }
        .news-card-body p {
            font-size: 0.9rem;
            color: var(--color-text-medium);
            margin: 0;
            flex: 1;
        }

        /* ============ 板块：数据统计 ============ */
        .stats-section {
            background: var(--color-primary);
            color: #FFFFFF;
            padding: 64px 0;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            text-align: center;
        }
        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
        }
        @media (max-width: 480px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
        }
        .stat-item .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--color-accent);
            line-height: 1.1;
            margin-bottom: 4px;
        }
        .stat-item .stat-label {
            font-size: 0.95rem;
            color: rgba(255,255,255,0.75);
            font-weight: 500;
        }
        @media (max-width: 520px) {
            .stat-item .stat-number {
                font-size: 2rem;
            }
            .stat-item .stat-label {
                font-size: 0.85rem;
            }
        }

        /* ============ 板块：观看流程 ============ */
        .steps-section {
            background: #FFFFFF;
        }
        .steps-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step-counter;
        }
        @media (max-width: 900px) {
            .steps-list {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 520px) {
            .steps-list {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }
        .step-item {
            text-align: center;
            position: relative;
            padding: 28px 20px;
            background: var(--color-bg);
            border-radius: var(--radius-lg);
            transition: all var(--transition-base);
            border: 1px solid transparent;
        }
        .step-item:hover {
            border-color: var(--color-border);
            box-shadow: var(--shadow-md);
            background: #FFFFFF;
        }
        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--color-highlight);
            color: #FFFFFF;
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 14px;
        }
        .step-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--color-text);
        }
        .step-item p {
            font-size: 0.9rem;
            color: var(--color-text-light);
            margin: 0;
        }

        /* ============ 板块：热门赛事 ============ */
        .matches-section {
            background: var(--color-bg);
        }
        .matches-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        @media (max-width: 700px) {
            .matches-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
        }
        .match-card {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            padding: 22px 24px;
            display: flex;
            align-items: center;
            gap: 20px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            cursor: default;
        }
        .match-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-border);
            transform: translateY(-2px);
        }
        .match-card .match-status {
            flex-shrink: 0;
            font-weight: 700;
            font-size: 0.82rem;
            padding: 5px 12px;
            border-radius: var(--radius-full);
            white-space: nowrap;
        }
        .match-status.live {
            background: #FDE8E8;
            color: #C53030;
        }
        .match-status.upcoming {
            background: #E8F1FB;
            color: #2B6CB0;
        }
        .match-status.ended {
            background: #EDF2F7;
            color: #718096;
        }
        .match-card .match-detail {
            flex: 1;
            min-width: 0;
        }
        .match-card .match-teams-name {
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--color-text);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .match-card .match-meta {
            font-size: 0.85rem;
            color: var(--color-text-light);
            margin-top: 2px;
        }
        .match-card .match-watch-btn {
            flex-shrink: 0;
            padding: 8px 16px;
            font-size: 0.85rem;
            font-weight: 600;
            border-radius: var(--radius-full);
            background: var(--color-highlight);
            color: #FFFFFF;
            border: none;
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .match-card .match-watch-btn:hover {
            background: var(--color-primary);
        }

        /* ============ 板块：FAQ ============ */
        .faq-section {
            background: #FFFFFF;
        }
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--color-border-light);
            padding: 20px 0;
            cursor: pointer;
            transition: all var(--transition-fast);
        }
        .faq-item:first-child {
            border-top: 1px solid var(--color-border-light);
        }
        .faq-item:hover {
            background: var(--color-bg);
            margin: 0 -16px;
            padding-left: 16px;
            padding-right: 16px;
            border-radius: var(--radius-md);
        }
        .faq-question {
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--color-text);
            display: flex;
            align-items: flex-start;
            gap: 12px;
        }
        .faq-question .faq-icon {
            color: var(--color-highlight);
            flex-shrink: 0;
            margin-top: 2px;
            font-size: 1.1rem;
        }
        .faq-answer {
            padding-left: 28px;
            margin-top: 8px;
            font-size: 0.95rem;
            color: var(--color-text-medium);
            line-height: 1.65;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .faq-item.open .faq-icon {
            transform: rotate(180deg);
            transition: transform var(--transition-base);
        }
        .faq-item .faq-icon {
            transition: transform var(--transition-base);
        }

        /* ============ 板块：CTA ============ */
        .cta-section {
            background: linear-gradient(160deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
            padding: 64px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -120px;
            width: 350px;
            height: 350px;
            background: radial-gradient(circle, rgba(255,255,255,0.04) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }
        .cta-section p {
            font-size: 1.08rem;
            color: rgba(255,255,255,0.78);
            margin-bottom: 28px;
            position: relative;
            z-index: 1;
        }
        .cta-section .btn-accent {
            position: relative;
            z-index: 1;
            font-size: 1.05rem;
            padding: 15px 36px;
        }
        @media (max-width: 520px) {
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
        }

        /* ============ 页脚 ============ */
        .site-footer {
            background: var(--color-footer);
            color: var(--color-footer-text);
            padding: 48px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }
        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }
        .footer-col h4 {
            color: #FFFFFF;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 14px;
        }
        .footer-col p,
        .footer-col li {
            font-size: 0.9rem;
            line-height: 1.7;
            margin-bottom: 6px;
        }
        .footer-col ul li a {
            color: var(--color-footer-text);
            transition: color var(--transition-fast);
        }
        .footer-col ul li a:hover {
            color: #FFFFFF;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.5);
        }

        /* ============ Foundation 覆盖 ============ */
        .row {
            max-width: var(--max-width);
            margin-left: auto;
            margin-right: auto;
        }
        .row .row {
            max-width: none;
        }
        button, .button {
            border-radius: var(--radius-full);
            font-weight: 600;
            transition: all var(--transition-base);
        }
        .button.primary {
            background-color: var(--color-highlight);
        }
        .button.primary:hover {
            background-color: #2C6DC8;
        }

        /* ============ 辅助工具类 ============ */
        .text-center { text-align: center; }
        .mt-0 { margin-top: 0; }
        .mb-0 { margin-bottom: 0; }

        /* ============ 移动端优化 ============ */
        @media (max-width: 768px) {
            :root {
                --section-gap: 56px;
                --section-gap-sm: 40px;
            }
            .hero-main-card {
                padding: 24px 18px;
            }
            .hero-main-card .match-teams {
                font-size: 1.15rem;
            }
        }
        @media (max-width: 520px) {
            :root {
                --nav-height: 60px;
                --section-gap: 40px;
                --section-gap-sm: 32px;
            }
            .section-header {
                margin-bottom: 28px;
            }
            .section-header h2 {
                font-size: 1.35rem;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
            .hero-actions {
                flex-direction: column;
                gap: 10px;
            }
            .hero-actions .btn {
                width: 100%;
            }
        }