/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --sidebar-width: 260px;
            --sidebar-bg: #0c1929;
            --sidebar-bg-hover: #152238;
            --sidebar-text: #c8d2e0;
            --sidebar-text-active: #ffffff;
            --sidebar-accent: #3b82f6;
            --sidebar-accent-light: #60a5fa;
            --sidebar-border: rgba(255, 255, 255, 0.06);

            --primary: #2563eb;
            --primary-hover: #1d4ed8;
            --primary-light: #dbeafe;
            --primary-50: #eff6ff;
            --accent: #f59e0b;
            --accent-light: #fef3c7;
            --accent-dark: #d97706;

            --bg-white: #ffffff;
            --bg-page: #f8fafc;
            --bg-card: #ffffff;
            --bg-section-alt: #f1f5f9;
            --bg-dark-section: #0f172a;
            --bg-live: #ef4444;
            --bg-upcoming: #f59e0b;
            --bg-finished: #6b7280;

            --text-primary: #1e293b;
            --text-secondary: #475569;
            --text-weak: #64748b;
            --text-muted: #94a3b8;
            --text-white: #ffffff;
            --text-sidebar: #c8d2e0;

            --border-light: #e2e8f0;
            --border-medium: #cbd5e1;
            --border-card: #e8ecf1;

            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 9999px;

            --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.08), 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.12), 0 4px 16px rgba(0, 0, 0, 0.05);
            --shadow-card-hover: 0 16px 40px rgba(0, 0, 0, 0.1), 0 4px 12px rgba(0, 0, 0, 0.05);

            --transition-fast: 0.15s ease;
            --transition-normal: 0.25s ease;
            --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);

            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
            --font-mono: 'SF Mono', 'Consolas', 'Monaco', monospace;

            --mobile-header-height: 60px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-page);
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-tap-highlight-color: transparent;
        }

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

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

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

        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        input {
            font-family: inherit;
            font-size: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text-primary);
        }

        /* ===== 整体布局 Wrapper ===== */
        .site-wrapper {
            display: flex;
            min-height: 100vh;
            position: relative;
        }

        /* ===== 侧边栏 Sidebar（桌面端固定左侧） ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--sidebar-bg);
            display: flex;
            flex-direction: column;
            z-index: 100;
            border-right: 1px solid var(--sidebar-border);
            transition: transform var(--transition-slow);
            overflow-y: auto;
            overflow-x: hidden;
        }

        .sidebar-logo {
            padding: 28px 24px 20px;
            border-bottom: 1px solid var(--sidebar-border);
        }

        .sidebar-logo a {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-white);
            font-weight: 800;
            font-size: 1.15rem;
            letter-spacing: 0.01em;
            line-height: 1.3;
            transition: opacity var(--transition-fast);
        }

        .sidebar-logo a:hover {
            opacity: 0.85;
        }

        .sidebar-logo .logo-icon {
            width: 38px;
            height: 38px;
            background: var(--sidebar-accent);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #fff;
            flex-shrink: 0;
        }

        .sidebar-nav {
            padding: 16px 14px;
            flex: 1;
        }

        .sidebar-nav-label {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: rgba(255, 255, 255, 0.35);
            padding: 0 10px;
            margin-bottom: 8px;
            font-weight: 600;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 11px 14px;
            border-radius: var(--radius-md);
            color: var(--sidebar-text);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition-fast);
            position: relative;
        }

        .sidebar-nav a i {
            width: 20px;
            text-align: center;
            font-size: 0.95rem;
            opacity: 0.7;
            transition: opacity var(--transition-fast);
        }

        .sidebar-nav a:hover {
            background: var(--sidebar-bg-hover);
            color: #e0e7f0;
        }

        .sidebar-nav a:hover i {
            opacity: 1;
        }

        .sidebar-nav a.active {
            background: var(--sidebar-accent);
            color: #ffffff;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(59, 130, 246, 0.35);
        }

        .sidebar-nav a.active i {
            opacity: 1;
            color: #ffffff;
        }

        .sidebar-footer {
            padding: 16px 20px 24px;
            border-top: 1px solid var(--sidebar-border);
            font-size: 0.78rem;
            color: rgba(255, 255, 255, 0.4);
            text-align: center;
            line-height: 1.5;
        }

        .sidebar-footer .slogan {
            display: block;
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.8rem;
            margin-bottom: 4px;
            font-weight: 500;
        }

        /* ===== 移动端顶部导航 ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--mobile-header-height);
            background: var(--sidebar-bg);
            z-index: 99;
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            border-bottom: 1px solid var(--sidebar-border);
        }

        .mobile-header .mobile-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            color: #fff;
            font-weight: 700;
            font-size: 0.95rem;
        }

        .mobile-header .mobile-logo .logo-icon-sm {
            width: 30px;
            height: 30px;
            background: var(--sidebar-accent);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
            color: #fff;
            flex-shrink: 0;
        }

        .mobile-header .hamburger {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.4rem;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }

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

        .mobile-header .hamburger:focus-visible {
            outline: 2px solid var(--sidebar-accent-light);
            outline-offset: 2px;
        }

        /* ===== 遮罩 Overlay ===== */
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.55);
            z-index: 98;
            opacity: 0;
            transition: opacity var(--transition-normal);
            pointer-events: none;
        }

        .sidebar-overlay.active {
            opacity: 1;
            pointer-events: auto;
        }

        /* ===== 主内容区 ===== */
        .main-content {
            flex: 1;
            margin-left: var(--sidebar-width);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            background: var(--bg-page);
        }

        /* ===== 容器 ===== */
        .container {
            width: 100%;
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 32px;
        }

        .container-narrow {
            max-width: 820px;
        }

        /* ===== 板块通用间距 ===== */
        .section {
            padding: 64px 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 40px;
        }

        .section-header .section-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--primary);
            background: var(--primary-50);
            padding: 5px 14px;
            border-radius: var(--radius-full);
            margin-bottom: 12px;
        }

        .section-header h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }

        .section-header p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto;
        }

        /* ===== Hero 板块 ===== */
        .hero-section {
            padding: 72px 0 56px;
            background: var(--bg-white);
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -80px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(59, 130, 246, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: -60px;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(245, 158, 11, 0.05) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--accent-light);
            color: var(--accent-dark);
            font-weight: 600;
            font-size: 0.85rem;
            padding: 7px 16px;
            border-radius: var(--radius-full);
            margin-bottom: 20px;
            animation: pulse-badge 3s ease-in-out infinite;
        }

        @keyframes pulse-badge {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.3);
            }
            50% {
                box-shadow: 0 0 0 12px rgba(245, 158, 11, 0);
            }
        }

        .hero-badge .live-dot {
            width: 8px;
            height: 8px;
            background: var(--bg-live);
            border-radius: 50%;
            animation: live-pulse 1.5s ease-in-out infinite;
        }

        @keyframes live-pulse {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.4;
                transform: scale(1.6);
            }
        }

        .hero-content h1 {
            font-size: 2.8rem;
            font-weight: 900;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin-bottom: 14px;
            line-height: 1.2;
        }

        .hero-content h1 .highlight {
            color: var(--primary);
            position: relative;
        }

        .hero-content .hero-subtitle {
            font-size: 1.15rem;
            color: var(--text-secondary);
            margin-bottom: 32px;
            line-height: 1.6;
        }

        .hero-actions {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
            margin-bottom: 28px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 26px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: var(--radius-md);
            transition: all var(--transition-normal);
            letter-spacing: 0.01em;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.3);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.4);
            transform: translateY(-1px);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
        }

        .btn-outline {
            background: var(--bg-white);
            color: var(--text-primary);
            border: 2px solid var(--border-medium);
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-50);
        }

        .btn-lg {
            padding: 15px 32px;
            font-size: 1rem;
            border-radius: var(--radius-lg);
        }

        .hero-search {
            max-width: 480px;
            margin: 0 auto;
            position: relative;
        }

        .hero-search input {
            width: 100%;
            padding: 14px 48px 14px 18px;
            border: 2px solid var(--border-light);
            border-radius: var(--radius-lg);
            font-size: 0.95rem;
            background: var(--bg-page);
            transition: all var(--transition-normal);
            color: var(--text-primary);
        }

        .hero-search input::placeholder {
            color: var(--text-muted);
        }

        .hero-search input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.08);
            background: #fff;
            outline: none;
        }

        .hero-search button {
            position: absolute;
            right: 6px;
            top: 50%;
            transform: translateY(-50%);
            width: 40px;
            height: 40px;
            border-radius: var(--radius-md);
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            transition: all var(--transition-fast);
        }

        .hero-search button:hover {
            background: var(--primary-hover);
        }

        /* ===== 核心优势卡片 ===== */
        .features-section {
            background: var(--bg-page);
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            text-align: center;
            border: 1px solid var(--border-card);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-normal);
            position: relative;
        }

        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: #d0d8e4;
        }

        .feature-card .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin: 0 auto 16px;
            background: var(--primary-50);
            color: var(--primary);
        }

        .feature-card:nth-child(2) .feature-icon {
            background: #fef3c7;
            color: #d97706;
        }
        .feature-card:nth-child(3) .feature-icon {
            background: #ecfdf5;
            color: #059669;
        }
        .feature-card:nth-child(4) .feature-icon {
            background: #fdf2f8;
            color: #db2777;
        }

        .feature-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-primary);
        }

        .feature-card p {
            font-size: 0.88rem;
            color: var(--text-weak);
            line-height: 1.55;
        }

        /* ===== 赛事直播板块 ===== */
        .matches-section {
            background: var(--bg-white);
        }

        .matches-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 18px;
        }

        .match-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            padding: 20px 22px;
            display: flex;
            align-items: center;
            gap: 16px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-normal);
            position: relative;
            overflow: hidden;
        }

        .match-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: #cdd5e0;
            transform: translateY(-2px);
        }

        .match-card .match-status {
            position: absolute;
            top: 12px;
            right: 14px;
            font-size: 0.72rem;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: var(--radius-full);
            letter-spacing: 0.03em;
        }

        .match-status.live {
            background: #fef2f2;
            color: #dc2626;
            animation: live-pulse-text 1.5s ease-in-out infinite;
        }

        @keyframes live-pulse-text {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.55;
            }
        }

        .match-status.upcoming {
            background: #fffbeb;
            color: #d97706;
        }

        .match-status.finished {
            background: #f3f4f6;
            color: #6b7280;
        }

        .match-teams {
            display: flex;
            align-items: center;
            gap: 10px;
            flex: 1;
            font-weight: 700;
            font-size: 1rem;
        }

        .match-teams .team-flag {
            font-size: 1.5rem;
            line-height: 1;
        }

        .match-teams .vs {
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.8rem;
            margin: 0 2px;
        }

        .match-info {
            text-align: right;
            flex-shrink: 0;
        }

        .match-info .match-time {
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--text-primary);
        }

        .match-info .match-date {
            font-size: 0.75rem;
            color: var(--text-weak);
            margin-top: 2px;
        }

        .match-card .btn-watch {
            padding: 8px 16px;
            font-size: 0.8rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            background: var(--primary);
            color: #fff;
            white-space: nowrap;
            transition: all var(--transition-fast);
            flex-shrink: 0;
        }

        .match-card .btn-watch:hover {
            background: var(--primary-hover);
        }

        .match-card .btn-watch.finished-btn {
            background: #e5e7eb;
            color: #6b7280;
            cursor: default;
            pointer-events: none;
        }

        /* ===== 数据统计板块 ===== */
        .stats-section {
            background: var(--bg-dark-section);
            color: #fff;
            padding: 56px 0;
        }

        .stats-section .section-header h2 {
            color: #fff;
        }
        .stats-section .section-header p {
            color: rgba(255, 255, 255, 0.65);
        }
        .stats-section .section-tag {
            background: rgba(255, 255, 255, 0.1);
            color: rgba(255, 255, 255, 0.85);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }

        .stat-item {
            padding: 20px;
        }

        .stat-number {
            font-size: 2.6rem;
            font-weight: 900;
            letter-spacing: -0.02em;
            color: #fff;
            margin-bottom: 4px;
            line-height: 1;
        }

        .stat-number .stat-plus {
            color: var(--accent);
        }

        .stat-label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            font-weight: 500;
        }

        .stat-divider {
            width: 1px;
            background: rgba(255, 255, 255, 0.15);
            align-self: stretch;
        }

        /* ===== 观看指南 ===== */
        .guide-section {
            background: var(--bg-page);
        }

        .guide-steps {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            position: relative;
        }

        .guide-step {
            text-align: center;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 32px 20px;
            border: 1px solid var(--border-card);
            box-shadow: var(--shadow-sm);
            position: relative;
            transition: all var(--transition-normal);
        }

        .guide-step:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
        }

        .guide-step .step-number {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 800;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
        }

        .guide-step:nth-child(2) .step-number {
            background: #f59e0b;
        }
        .guide-step:nth-child(3) .step-number {
            background: #10b981;
        }

        .guide-step h3 {
            font-size: 1.05rem;
            margin-bottom: 6px;
        }
        .guide-step p {
            font-size: 0.88rem;
            color: var(--text-weak);
        }

        .guide-connector {
            display: none;
        }

        /* ===== FAQ 板块 ===== */
        .faq-section {
            background: var(--bg-white);
        }

        .faq-list {
            max-width: 720px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .faq-item {
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            background: var(--bg-card);
            overflow: hidden;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: var(--border-medium);
        }

        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 20px;
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: background var(--transition-fast);
            cursor: pointer;
            background: none;
            border: none;
            font-family: inherit;
        }

        .faq-question:hover {
            background: var(--bg-page);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg-page);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            transition: all var(--transition-normal);
            color: var(--text-weak);
        }

        .faq-item.open .faq-question .faq-icon {
            background: var(--primary-50);
            color: var(--primary);
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-normal);
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
        }

        .faq-answer-inner {
            padding: 0 20px 18px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* ===== CTA 板块 ===== */
        .cta-section {
            background: var(--primary);
            color: #fff;
            text-align: center;
            padding: 60px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -60px;
            width: 280px;
            height: 280px;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
        }

        .cta-section h2 {
            color: #fff;
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 10px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.05rem;
            margin-bottom: 28px;
        }
        .cta-section .btn-cta {
            background: #fff;
            color: var(--primary);
            font-weight: 700;
            padding: 15px 36px;
            border-radius: var(--radius-lg);
            font-size: 1rem;
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.18);
            transition: all var(--transition-normal);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .cta-section .btn-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 14px 36px rgba(0, 0, 0, 0.25);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0c1929;
            color: rgba(255, 255, 255, 0.55);
            padding: 36px 0;
            text-align: center;
            font-size: 0.85rem;
            line-height: 1.7;
        }

        .site-footer .footer-brand {
            color: #fff;
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 6px;
        }

        .site-footer a {
            color: rgba(255, 255, 255, 0.7);
            transition: color var(--transition-fast);
        }
        .site-footer a:hover {
            color: #fff;
        }

        .footer-divider {
            width: 40px;
            height: 2px;
            background: rgba(255, 255, 255, 0.2);
            margin: 14px auto;
            border-radius: 1px;
        }

        /* ===== 响应式设计 ===== */

        /* 平板端 (768px - 1024px) */
        @media (max-width: 1024px) {
            :root {
                --sidebar-width: 220px;
            }
            .hero-content h1 {
                font-size: 2.2rem;
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .matches-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-divider {
                display: none;
            }
            .guide-steps {
                grid-template-columns: repeat(3, 1fr);
                gap: 16px;
            }
            .container {
                padding: 0 24px;
            }
            .section {
                padding: 48px 0;
            }
            .sidebar-logo a {
                font-size: 1rem;
            }
            .sidebar-nav a {
                font-size: 0.88rem;
                padding: 9px 12px;
            }
        }

        /* 手机端 (520px - 768px) */
        @media (max-width: 768px) {
            .sidebar {
                transform: translateX(-100%);
                width: 280px;
                box-shadow: var(--shadow-xl);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .sidebar-overlay {
                display: block;
            }
            .mobile-header {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: var(--mobile-header-height);
            }
            .hero-section {
                padding: 44px 0 36px;
            }
            .hero-content h1 {
                font-size: 1.75rem;
            }
            .hero-content .hero-subtitle {
                font-size: 1rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
                gap: 10px;
            }
            .hero-actions .btn {
                width: 100%;
                max-width: 320px;
                justify-content: center;
            }
            .hero-search {
                max-width: 100%;
            }
            .features-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .feature-card {
                padding: 20px 14px;
            }
            .feature-card h3 {
                font-size: 0.9rem;
            }
            .feature-card p {
                font-size: 0.78rem;
            }
            .matches-grid {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .match-card {
                flex-wrap: wrap;
                gap: 10px;
                padding: 16px;
            }
            .match-teams {
                font-size: 0.9rem;
                flex: 1 1 60%;
            }
            .match-info {
                flex: 1 1 30%;
                text-align: left;
            }
            .match-card .btn-watch {
                flex: 0 0 auto;
                margin-left: auto;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-number {
                font-size: 2rem;
            }
            .guide-steps {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .section {
                padding: 40px 0;
            }
            .container {
                padding: 0 16px;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .faq-question {
                font-size: 0.88rem;
                padding: 14px 16px;
            }
            .faq-answer-inner {
                padding: 0 16px 14px;
                font-size: 0.82rem;
            }
        }

        /* 小手机端 (<520px) */
        @media (max-width: 520px) {
            .hero-content h1 {
                font-size: 1.45rem;
            }
            .hero-content .hero-subtitle {
                font-size: 0.9rem;
            }
            .features-grid {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .feature-card {
                padding: 18px 14px;
                display: flex;
                align-items: center;
                gap: 14px;
                text-align: left;
            }
            .feature-card .feature-icon {
                margin: 0;
                flex-shrink: 0;
                width: 42px;
                height: 42px;
                font-size: 1.1rem;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }
            .stat-number {
                font-size: 1.7rem;
            }
            .stat-label {
                font-size: 0.78rem;
            }
            .match-card {
                flex-direction: column;
                align-items: flex-start;
            }
            .match-card .btn-watch {
                align-self: stretch;
                text-align: center;
                margin-left: 0;
                margin-top: 4px;
            }
            .match-info {
                text-align: left;
            }
            .btn {
                padding: 11px 20px;
                font-size: 0.85rem;
            }
            .btn-lg {
                padding: 13px 24px;
                font-size: 0.9rem;
            }
            .sidebar {
                width: 260px;
            }
        }