:root {
            --primary-color: #003366;
            --secondary-color: #CC0000;
            --accent-color: #FFD700;
            --light-color: #F8F9FA;
            --dark-color: #212529;
            --success-color: #28A745;
            --info-color: #17A2B8;
        }
        body {
            font-family: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
            line-height: 1.7;
            color: #333;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--primary-color);
        }
        .navbar {
            background-color: rgba(0, 51, 102, 0.95);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            padding: 0.8rem 0;
            transition: all 0.3s ease;
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.5rem;
            color: white !important;
        }
        .navbar-brand span {
            color: var(--accent-color);
        }
        .nav-link {
            color: rgba(255, 255, 255, 0.9) !important;
            font-weight: 500;
            padding: 0.5rem 1rem !important;
            margin: 0 0.2rem;
            border-radius: 4px;
            transition: all 0.3s ease;
        }
        .nav-link:hover {
            background-color: rgba(255, 255, 255, 0.1);
            color: white !important;
            transform: translateY(-2px);
        }
        .nav-link.active {
            background-color: var(--secondary-color);
            color: white !important;
        }
        .hero-section {
            background: linear-gradient(rgba(0, 30, 60, 0.85), rgba(0, 30, 60, 0.9)), url('https://images.unsplash.com/photo-1551958219-acbc608c6377?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 8rem 0 6rem;
            margin-top: 76px;
        }
        .hero-section h1 {
            color: white;
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
        }
        .hero-section p {
            font-size: 1.2rem;
            opacity: 0.9;
            max-width: 800px;
            margin: 0 auto 2rem;
        }
        .match-prediction {
            background-color: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(10px);
            border-radius: 15px;
            padding: 2rem;
            max-width: 900px;
            margin: 3rem auto 0;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        .team-flag {
            width: 80px;
            height: 60px;
            object-fit: cover;
            border-radius: 8px;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
        }
        .vs-text {
            font-size: 2.5rem;
            font-weight: 900;
            color: var(--accent-color);
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
        }
        .card {
            border: none;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        .card-header {
            background-color: var(--primary-color);
            color: white;
            font-weight: 600;
            padding: 1rem 1.5rem;
            border-bottom: none;
        }
        .live-score {
            background-color: var(--secondary-color);
            color: white;
            padding: 0.5rem 1.5rem;
            border-radius: 30px;
            font-weight: 700;
            animation: pulse 2s infinite;
            display: inline-block;
        }
        @keyframes pulse {
            0% { opacity: 1; }
            50% { opacity: 0.7; }
            100% { opacity: 1; }
        }
        .stats-item {
            text-align: center;
            padding: 1.5rem;
            border-radius: 12px;
            background-color: var(--light-color);
            transition: all 0.3s ease;
        }
        .stats-item:hover {
            background-color: white;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
        }
        .stats-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary-color);
            line-height: 1;
        }
        .data-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
        }
        .data-table th {
            background-color: var(--primary-color);
            color: white;
            font-weight: 600;
            padding: 1rem;
            text-align: center;
        }
        .data-table td {
            padding: 1rem;
            border-bottom: 1px solid #eee;
            text-align: center;
        }
        .data-table tr:last-child td {
            border-bottom: none;
        }
        .data-table tr:hover {
            background-color: rgba(0, 51, 102, 0.05);
        }
        .friendlink {
            background-color: var(--light-color);
            padding: 4rem 0;
        }
        .flink {
            display: inline-block;
            background-color: white;
            padding: 0.8rem 1.5rem;
            margin: 0.5rem;
            border-radius: 8px;
            color: var(--primary-color);
            font-weight: 500;
            text-decoration: none;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
            border: 1px solid #eee;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
            text-decoration: none;
        }
        footer {
            background-color: var(--dark-color);
            color: rgba(255, 255, 255, 0.8);
        }
        footer h5 {
            color: white;
            font-weight: 600;
            margin-bottom: 1.5rem;
        }
        footer a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        footer a:hover {
            color: var(--accent-color);
            text-decoration: underline;
        }
        .copyright {
            background-color: rgba(0, 0, 0, 0.3);
            padding: 1.5rem 0;
            font-size: 0.9rem;
        }
        @media (max-width: 992px) {
            .hero-section h1 {
                font-size: 2.8rem;
            }
            .hero-section {
                padding: 6rem 0 4rem;
            }
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.3rem;
            }
            .hero-section p {
                font-size: 1.1rem;
            }
            .match-prediction {
                padding: 1.5rem;
            }
            .vs-text {
                font-size: 2rem;
            }
            .team-flag {
                width: 60px;
                height: 45px;
            }
        }
        @media (max-width: 576px) {
            .hero-section {
                padding: 5rem 0 3rem;
            }
            .hero-section h1 {
                font-size: 1.8rem;
            }
            .navbar-brand {
                font-size: 1.2rem;
            }
        }
        .tooltip-icon {
            color: var(--info-color);
            cursor: help;
            margin-left: 5px;
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 0.6rem 1.8rem;
            font-weight: 600;
            border-radius: 8px;
        }
        .btn-primary:hover {
            background-color: #002952;
            border-color: #002952;
            transform: translateY(-2px);
            box-shadow: 0 6px 12px rgba(0, 51, 102, 0.2);
        }
        .btn-outline-primary {
            color: var(--primary-color);
            border-color: var(--primary-color);
        }
        .btn-outline-primary:hover {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
        }
        .section-divider {
            height: 4px;
            width: 80px;
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            margin: 2rem auto 3rem;
            border-radius: 2px;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: var(--secondary-color);
            transform: translateY(-5px);
        }