:root {
            --primary: #0d6efd;
            --secondary: #6c757d;
            --success: #198754;
            --danger: #dc3545;
            --warning: #ffc107;
            --info: #0dcaf0;
            --light: #f8f9fa;
            --dark: #212529;
            --worldcup-green: #1e7e34;
            --worldcup-yellow: #ffd700;
            --worldcup-blue: #0056b3;
        }
        body {
            font-family: "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
            line-height: 1.8;
            color: #333;
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            min-height: 100vh;
        }
        .hero-section {
            background: linear-gradient(rgba(13, 110, 253, 0.85), rgba(25, 135, 84, 0.8)), url('https://images.unsplash.com/photo-1575361204480-aadea25e6e68?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 120px 0;
            position: relative;
        }
        .navbar {
            background: rgba(33, 37, 41, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
            transition: all 0.3s ease;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--worldcup-yellow) !important;
        }
        .nav-link {
            font-weight: 500;
            margin: 0 8px;
            border-radius: 8px;
            transition: all 0.3s;
            position: relative;
        }
        .nav-link:hover {
            background: rgba(255, 255, 255, 0.15);
            transform: translateY(-2px);
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background: var(--worldcup-yellow);
            transition: width 0.3s;
        }
        .nav-link:hover::after {
            width: 70%;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 40px;
            font-weight: 700;
            color: var(--worldcup-blue);
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 80px;
            height: 4px;
            background: linear-gradient(90deg, var(--worldcup-green), var(--worldcup-yellow));
            border-radius: 2px;
        }
        .card-hover {
            transition: transform 0.3s, box-shadow 0.3s;
            border: none;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
        }
        .live-badge {
            animation: pulse 2s infinite;
            border-radius: 20px;
            padding: 5px 15px;
            font-weight: bold;
        }
        @keyframes pulse {
            0% { opacity: 1; }
            50% { opacity: 0.7; }
            100% { opacity: 1; }
        }
        .flag-icon {
            width: 60px;
            height: 40px;
            object-fit: cover;
            border-radius: 4px;
            box-shadow: 0 3px 10px rgba(0,0,0,0.2);
        }
        .match-card {
            background: white;
            border-left: 5px solid var(--worldcup-green);
            border-radius: 10px;
        }
        .data-chart {
            background: linear-gradient(45deg, #ffffff, #f8f9fa);
            border-radius: 15px;
            padding: 25px;
            box-shadow: inset 0 0 15px rgba(0,0,0,0.05);
        }
        .friendlink a.flink {
            display: inline-block;
            background: white;
            padding: 10px 25px;
            margin: 8px;
            border-radius: 50px;
            color: var(--dark);
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            border: 2px solid transparent;
        }
        .friendlink a.flink:hover {
            background: var(--primary);
            color: white;
            transform: translateY(-3px);
            border-color: var(--primary);
            box-shadow: 0 10px 20px rgba(13, 110, 253, 0.2);
        }
        footer {
            background: linear-gradient(135deg, #212529 0%, #343a40 100%);
            color: #dee2e6;
            padding-top: 60px;
        }
        .footer-links a {
            color: #adb5bd;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        .btn-worldcup {
            background: linear-gradient(90deg, var(--worldcup-green), var(--worldcup-blue));
            color: white;
            border: none;
            padding: 12px 30px;
            border-radius: 50px;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn-worldcup:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(25, 135, 84, 0.3);
            color: white;
        }
        .analysis-box {
            background: white;
            border-radius: 15px;
            padding: 25px;
            margin-bottom: 25px;
            border-top: 5px solid var(--warning);
            box-shadow: 0 8px 25px rgba(0,0,0,0.06);
        }
        @media (max-width: 768px) {
            .hero-section { padding: 80px 0; }
            .display-4 { font-size: 2.5rem; }
            .section-title { font-size: 1.8rem; }
        }
        .seo-content {
            line-height: 1.9;
            font-size: 1.05rem;
            color: #444;
            text-align: justify;
        }
        .seo-content h3 {
            color: var(--worldcup-green);
            margin-top: 30px;
        }