:root {
            --primary-color: #0d6efd;
            --secondary-color: #6c757d;
            --accent-color: #198754;
            --dark-color: #212529;
            --light-color: #f8f9fa;
            --worldcup-blue: #0056a6;
            --worldcup-green: #1d8a3c;
            --argentina-blue: #74acdf;
            --algeria-green: #006233;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            line-height: 1.7;
            color: #333;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.3rem;
            color: var(--worldcup-blue) !important;
        }
        .hero-section {
            background: linear-gradient(rgba(0, 84, 166, 0.85), rgba(29, 138, 60, 0.85)), 
                        url('https://images.unsplash.com/photo-1553778263-73a83bab9b0c?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 6rem 0;
            margin-bottom: 3rem;
        }
        .match-prediction-card {
            border: 3px solid var(--argentina-blue);
            border-radius: 15px;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            overflow: hidden;
        }
        .match-prediction-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 86, 166, 0.2);
        }
        .team-flag {
            width: 80px;
            height: 50px;
            object-fit: cover;
            border-radius: 4px;
            box-shadow: 0 3px 6px rgba(0,0,0,0.1);
        }
        .live-badge {
            animation: pulse 2s infinite;
        }
        @keyframes pulse {
            0% { opacity: 1; }
            50% { opacity: 0.6; }
            100% { opacity: 1; }
        }
        .stat-card {
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            border-left: 5px solid var(--accent-color);
            transition: all 0.3s;
        }
        .stat-card:hover {
            background: linear-gradient(135deg, #e9ecef 0%, #dee2e6 100%);
        }
        .analysis-section {
            background-color: #f8f9fa;
            border-radius: 10px;
            padding: 2rem;
        }
        .friendlink a.flink {
            background: linear-gradient(135deg, #e9ecef 0%, #dee2e6 100%);
            padding: 12px 25px;
            border-radius: 8px;
            display: inline-block;
            margin: 5px;
            color: var(--dark-color);
            text-decoration: none;
            transition: all 0.3s;
            border: 1px solid #ced4da;
        }
        .friendlink a.flink:hover {
            background: linear-gradient(135deg, #dee2e6 0%, #ced4da 100%);
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        footer {
            background-color: var(--dark-color);
            color: var(--light-color);
        }
        .social-icon {
            font-size: 1.5rem;
            transition: color 0.3s;
        }
        .social-icon:hover {
            color: var(--primary-color) !important;
        }
        .nav-link {
            font-weight: 500;
            position: relative;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            width: 0;
            height: 2px;
            background: var(--primary-color);
            transition: all 0.3s ease;
        }
        .nav-link:hover::after {
            width: 100%;
            left: 0;
        }
        .prediction-chart {
            height: 300px;
            background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
            border-radius: 10px;
            padding: 20px;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 4rem 0;
            }
            .team-flag {
                width: 60px;
                height: 40px;
            }
            .display-4 {
                font-size: 2.2rem;
            }
        }