:root {
            --primary-color: #1a237e;
            --secondary-color: #ff9800;
            --accent-color: #4caf50;
            --text-color: #333;
            --light-bg: #f8f9fa;
            --dark-bg: #212529;
        }
        body {
            font-family: "Microsoft YaHei", "SimHei", sans-serif;
            color: var(--text-color);
            line-height: 1.6;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .navbar-nav .nav-link {
            font-weight: 500;
            transition: color 0.3s;
        }
        .navbar-nav .nav-link:hover {
            color: var(--secondary-color) !important;
        }
        .hero-section {
            background: linear-gradient(rgba(26, 35, 126, 0.8), rgba(26, 35, 126, 0.9)), url('https://images.unsplash.com/photo-1558618666-fcd25c85cd64?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 120px 0;
        }
        .hero-section h1 {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 20px;
        }
        .section-title {
            color: var(--primary-color);
            border-bottom: 3px solid var(--secondary-color);
            padding-bottom: 10px;
            margin-bottom: 30px;
            display: inline-block;
        }
        .card {
            border: none;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            transition: transform 0.3s, box-shadow 0.3s;
            height: 100%;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.2);
        }
        .card-icon {
            font-size: 3rem;
            color: var(--secondary-color);
            margin-bottom: 20px;
        }
        .service-card, .prediction-card {
            border-left: 5px solid var(--accent-color);
        }
        .news-card img {
            height: 200px;
            object-fit: cover;
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 10px 30px;
            font-weight: 600;
            transition: background-color 0.3s;
        }
        .btn-primary:hover {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
        }
        .contact-info i {
            color: var(--primary-color);
            margin-right: 10px;
        }
        .friendlink .flink {
            display: inline-block;
            padding: 8px 15px;
            margin: 5px;
            background-color: var(--light-bg);
            border-radius: 5px;
            text-decoration: none;
            color: var(--text-color);
            transition: background-color 0.3s, color 0.3s;
        }
        .friendlink .flink:hover {
            background-color: var(--primary-color);
            color: white;
        }
        footer {
            background-color: var(--dark-bg);
            color: white;
            padding: 40px 0 20px;
        }
        footer a {
            color: #ccc;
            text-decoration: none;
            transition: color 0.3s;
        }
        footer a:hover {
            color: var(--secondary-color);
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }