:root {
            --primary-color: #1a5fb4;
            --secondary-color: #e95420;
            --accent-color: #2ec27e;
            --dark-color: #1c1c1c;
            --light-color: #f8f9fa;
            --text-color: #333;
            --border-radius: 8px;
            --box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            --transition: all 0.3s ease;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: #fff;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5 {
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--dark-color);
        }
        a {
            text-decoration: none;
            color: var(--primary-color);
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary-color);
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 10px 25px;
            border-radius: var(--border-radius);
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-primary:hover {
            background-color: #0d4a9c;
            border-color: #0d4a9c;
            transform: translateY(-3px);
            box-shadow: var(--box-shadow);
        }
        .btn-secondary {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            color: white;
            padding: 10px 25px;
            border-radius: var(--border-radius);
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-secondary:hover {
            background-color: #d34515;
            border-color: #d34515;
            color: white;
            transform: translateY(-3px);
            box-shadow: var(--box-shadow);
        }
        .section-header {
            text-align: center;
            margin-bottom: 3rem;
            position: relative;
            padding-bottom: 15px;
        }
        .section-header:after {
            content: '';
            position: absolute;
            width: 80px;
            height: 4px;
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            border-radius: 2px;
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            padding: 15px 0;
            transition: var(--transition);
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
            display: flex;
            align-items: center;
        }
        .navbar-brand i {
            color: var(--secondary-color);
            margin-right: 10px;
        }
        .nav-link {
            font-weight: 600;
            margin: 0 8px;
            color: var(--dark-color) !important;
            position: relative;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary-color) !important;
        }
        .nav-link:after {
            content: '';
            position: absolute;
            width: 0;
            height: 3px;
            background-color: var(--primary-color);
            bottom: 0;
            left: 0;
            transition: var(--transition);
            border-radius: 2px;
        }
        .nav-link:hover:after, .nav-link.active:after {
            width: 100%;
        }
        .hero-section {
            background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('https://images.unsplash.com/photo-1575361204480-aadea25e6e68?ixlib=rb-4.0.3&auto=format&fit=crop&w=2071&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 120px 0 100px;
            text-align: center;
            position: relative;
        }
        .hero-section h1 {
            color: white;
            font-size: 3.2rem;
            margin-bottom: 20px;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
        }
        .hero-section p {
            font-size: 1.2rem;
            max-width: 800px;
            margin: 0 auto 30px;
            opacity: 0.9;
        }
        .hero-stats {
            background-color: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(10px);
            border-radius: var(--border-radius);
            padding: 25px;
            margin-top: 40px;
            display: flex;
            justify-content: space-around;
            flex-wrap: wrap;
            max-width: 900px;
            margin-left: auto;
            margin-right: auto;
        }
        .stat-item {
            text-align: center;
            padding: 15px;
        }
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--accent-color);
            display: block;
            line-height: 1;
        }
        .stat-label {
            font-size: 0.9rem;
            opacity: 0.9;
        }
        .feature-card {
            background: white;
            border-radius: var(--border-radius);
            padding: 30px;
            height: 100%;
            box-shadow: var(--box-shadow);
            transition: var(--transition);
            border-top: 4px solid var(--primary-color);
        }
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .feature-icon {
            width: 70px;
            height: 70px;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            color: white;
            font-size: 1.8rem;
        }
        .prediction-card {
            background: white;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--box-shadow);
            transition: var(--transition);
            height: 100%;
        }
        .prediction-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 25px rgba(0,0,0,0.15);
        }
        .prediction-header {
            background: linear-gradient(to right, var(--primary-color), #2a7cde);
            color: white;
            padding: 15px;
            text-align: center;
        }
        .prediction-body {
            padding: 25px;
        }
        .team-logo {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            object-fit: cover;
            border: 3px solid #eee;
        }
        .team-name {
            font-weight: 700;
            font-size: 1.2rem;
        }
        .vs-text {
            font-weight: 800;
            color: var(--secondary-color);
            margin: 0 15px;
        }
        .prediction-result {
            background-color: #f8f9fa;
            padding: 15px;
            border-radius: var(--border-radius);
            margin: 20px 0;
            text-align: center;
            border-left: 4px solid var(--accent-color);
        }
        .probability-bar {
            height: 10px;
            background-color: #e9ecef;
            border-radius: 5px;
            margin: 15px 0;
            overflow: hidden;
        }
        .probability-fill {
            height: 100%;
            background: linear-gradient(to right, var(--primary-color), var(--accent-color));
            border-radius: 5px;
        }
        .article-card {
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--box-shadow);
            transition: var(--transition);
            height: 100%;
            background: white;
        }
        .article-card:hover {
            transform: translateY(-5px);
        }
        .article-img {
            height: 200px;
            width: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .article-card:hover .article-img {
            transform: scale(1.05);
        }
        .article-content {
            padding: 25px;
        }
        .article-meta {
            color: #6c757d;
            font-size: 0.9rem;
            margin-bottom: 10px;
        }
        .flink {
            display: inline-block;
            background-color: #f8f9fa;
            padding: 12px 25px;
            border-radius: var(--border-radius);
            margin: 8px;
            color: var(--dark-color);
            font-weight: 500;
            transition: var(--transition);
            border: 1px solid #e9ecef;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-3px);
            border-color: var(--primary-color);
        }
        .footer {
            background-color: var(--dark-color);
            color: #ddd;
            padding: 60px 0 30px;
        }
        .footer h5 {
            color: white;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer h5:after {
            content: '';
            position: absolute;
            width: 50px;
            height: 3px;
            background-color: var(--accent-color);
            bottom: 0;
            left: 0;
        }
        .footer-links li {
            margin-bottom: 12px;
            list-style: none;
        }
        .footer-links a {
            color: #aaa;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        .copyright {
            border-top: 1px solid #444;
            padding-top: 20px;
            margin-top: 40px;
            text-align: center;
            color: #aaa;
            font-size: 0.9rem;
        }
        .contact-info li {
            margin-bottom: 15px;
            list-style: none;
            display: flex;
            align-items: center;
        }
        .contact-info i {
            width: 40px;
            height: 40px;
            background-color: rgba(255,255,255,0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 15px;
            color: var(--accent-color);
        }
        .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;
            cursor: pointer;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            box-shadow: 0 4px 12px rgba(26, 95, 180, 0.3);
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: var(--secondary-color);
            transform: translateY(-5px);
        }
        @media (max-width: 992px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .hero-stats {
                padding: 15px;
            }
            .stat-item {
                padding: 10px;
                width: 50%;
            }
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 100px 0 70px;
            }
            .hero-section h1 {
                font-size: 2rem;
            }
            .section-header h2 {
                font-size: 1.8rem;
            }
            .feature-card, .prediction-card, .article-card {
                margin-bottom: 30px;
            }
        }
        @media (max-width: 576px) {
            .hero-stats {
                flex-direction: column;
                align-items: center;
            }
            .stat-item {
                width: 100%;
                padding: 10px 0;
            }
            .flink {
                display: block;
                text-align: center;
                margin: 8px 0;
            }
        }