:root {
            --primary-color: #0d6efd;
            --secondary-color: #6c757d;
            --success-color: #198754;
            --warning-color: #ffc107;
            --danger-color: #dc3545;
            --dark-color: #212529;
            --light-color: #f8f9fa;
            --worldcup-green: #1e7e34;
            --worldcup-gold: #ffd700;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: #333;
            line-height: 1.6;
        }
        .navbar {
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            background: linear-gradient(135deg, #0d6efd 0%, #0a58ca 100%);
        }
        .hero-section {
            background: linear-gradient(rgba(13, 110, 253, 0.9), rgba(10, 88, 202, 0.9)), url('https://images.unsplash.com/photo-1556056504-5c7696c4c28d?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 100px 0;
        }
        .stat-card {
            border-radius: 10px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border: none;
            overflow: hidden;
        }
        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.15);
        }
        .match-card {
            border-left: 5px solid var(--worldcup-green);
            background: var(--light-color);
        }
        .analysis-card {
            border-top: 4px solid var(--primary-color);
        }
        .live-badge {
            animation: pulse 2s infinite;
            background-color: var(--danger-color);
        }
        @keyframes pulse {
            0% { opacity: 1; }
            50% { opacity: 0.7; }
            100% { opacity: 1; }
        }
        .country-flag {
            width: 40px;
            height: 30px;
            object-fit: cover;
            border-radius: 3px;
            box-shadow: 0 2px 4px rgba(0,0,0,0.2);
        }
        .prediction-meter {
            height: 25px;
            border-radius: 12px;
            overflow: hidden;
        }
        .friendlink {
            background-color: #f8f9fa;
            border-top: 1px solid #dee2e6;
            border-bottom: 1px solid #dee2e6;
        }
        .flink {
            display: inline-block;
            padding: 8px 16px;
            margin: 5px;
            background: white;
            border-radius: 6px;
            text-decoration: none;
            color: #495057;
            border: 1px solid #dee2e6;
            transition: all 0.3s ease;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
            transform: translateY(-2px);
        }
        footer {
            background: linear-gradient(135deg, #212529 0%, #343a40 100%);
            color: white;
        }
        .footer-link {
            color: #adb5bd;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer-link:hover {
            color: white;
        }
        .data-table th {
            background-color: #f1f3f5;
            font-weight: 600;
        }
        .mobile-optimized {
            font-size: 1rem;
        }
        @media (max-width: 768px) {
            .hero-section { padding: 60px 0; }
            .display-4 { font-size: 2.5rem; }
            .mobile-optimized { font-size: 0.95rem; }
        }