:root {
            --primary-color: #0d6efd;
            --secondary-color: #6c757d;
            --accent-color: #dc3545;
            --success-color: #198754;
            --dark-color: #212529;
            --light-color: #f8f9fa;
            --worldcup-gold: #ffd700;
            --worldcup-green: #1e7e34;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: #333;
            background-color: #fefefe;
            line-height: 1.6;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.5rem;
            color: var(--worldcup-green) !important;
        }
        .worldcup-badge {
            background: linear-gradient(90deg, var(--worldcup-green), var(--worldcup-gold));
            color: white;
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: bold;
        }
        .hero-section {
            background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('https://images.unsplash.com/photo-1551958219-acbc608c6377?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') center/cover no-repeat;
            color: white;
            padding: 6rem 0;
            text-shadow: 1px 1px 3px rgba(0,0,0,0.8);
        }
        .hero-title {
            font-size: 3rem;
            font-weight: 800;
            margin-bottom: 1.5rem;
        }
        @media (max-width: 768px) {
            .hero-title { font-size: 2.2rem; }
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 2rem;
            font-weight: 700;
            color: var(--dark-color);
        }
        .section-title:after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 60px;
            height: 4px;
            background: var(--worldcup-green);
        }
        .text-center .section-title:after {
            left: 50%;
            transform: translateX(-50%);
        }
        .card {
            border: none;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            overflow: hidden;
            margin-bottom: 1.5rem;
        }
        .card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .card-header {
            background-color: var(--worldcup-green);
            color: white;
            font-weight: 600;
            border-bottom: none;
            padding: 1rem 1.25rem;
        }
        .match-card {
            border-left: 5px solid var(--accent-color);
        }
        .team-flag {
            width: 40px;
            height: 40px;
            object-fit: contain;
            border-radius: 50%;
            box-shadow: 0 2px 5px rgba(0,0,0,0.2);
        }
        .prediction-badge {
            font-size: 0.9rem;
            padding: 0.35rem 0.9rem;
        }
        .live-badge {
            animation: pulse 1.5s infinite;
            background-color: var(--accent-color);
        }
        @keyframes pulse {
            0% { opacity: 1; }
            50% { opacity: 0.6; }
            100% { opacity: 1; }
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
            gap: 1rem;
        }
        .stat-box {
            background: white;
            padding: 1.5rem 1rem;
            text-align: center;
            border-radius: 10px;
            box-shadow: 0 3px 10px rgba(0,0,0,0.08);
        }
        .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--worldcup-green);
            line-height: 1;
        }
        .flink {
            display: inline-block;
            background: var(--light-color);
            color: var(--dark-color);
            padding: 0.6rem 1.5rem;
            margin: 0.5rem;
            border-radius: 50px;
            text-decoration: none;
            transition: all 0.3s ease;
            border: 1px solid #dee2e6;
            font-weight: 500;
        }
        .flink:hover {
            background: var(--worldcup-green);
            color: white;
            transform: scale(1.05);
            border-color: var(--worldcup-green);
        }
        .friendlink {
            background-color: #f8f9fa;
            padding: 3rem 0;
        }
        footer {
            background-color: var(--dark-color);
            color: #adb5bd;
            padding-top: 3rem;
        }
        .footer-links a {
            color: #adb5bd;
            text-decoration: none;
            transition: color 0.2s;
        }
        .footer-links a:hover {
            color: white;
            text-decoration: underline;
        }
        .copyright {
            border-top: 1px solid #495057;
            padding-top: 1.5rem;
            margin-top: 2rem;
            font-size: 0.9rem;
        }
        .accordion-button:not(.collapsed) {
            background-color: rgba(30, 126, 52, 0.1);
            color: var(--worldcup-green);
            font-weight: 600;
        }
        .table-hover tbody tr:hover {
            background-color: rgba(30, 126, 52, 0.05);
        }
        .analysis-highlight {
            background: linear-gradient(120deg, rgba(255,215,0,0.1) 0%, rgba(255,215,0,0) 100%);
            border-left: 4px solid var(--worldcup-gold);
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
        }
        .contact-icon {
            width: 50px;
            height: 50px;
            background: var(--worldcup-green);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            margin-right: 1rem;
        }
        .btn-worldcup {
            background: linear-gradient(90deg, var(--worldcup-green), #2a9d4b);
            color: white;
            border: none;
            padding: 0.75rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .btn-worldcup:hover {
            background: linear-gradient(90deg, #2a9d4b, var(--worldcup-green));
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 7px 15px rgba(30, 126, 52, 0.3);
        }
        .img-fluid {
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        .tab-content {
            padding-top: 1.5rem;
        }
        .nav-tabs .nav-link.active {
            color: var(--worldcup-green);
            border-bottom: 3px solid var(--worldcup-green);
            font-weight: 600;
        }
        .nav-tabs .nav-link {
            color: var(--secondary-color);
            border: none;
            margin-right: 1rem;
            padding: 0.75rem 1.5rem;
        }
        .nav-tabs {
            border-bottom: 1px solid #dee2e6;
        }