:root {
            --primary-color: #0056b3;
            --secondary-color: #28a745;
            --dark-color: #333;
            --light-color: #f8f9fa;
        }
        body {
            font-family: "Microsoft YaHei", sans-serif;
            color: var(--dark-color);
            line-height: 1.6;
        }
        .navbar-brand {
            font-weight: bold;
            font-size: 1.8rem;
        }
        .hero-section {
            background: linear-gradient(rgba(0, 84, 180, 0.8), rgba(0, 84, 180, 0.9)), url('https://images.unsplash.com/photo-1581094794329-c8112a89af12?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') no-repeat center center/cover;
            color: white;
            padding: 150px 0;
        }
        .section-title {
            position: relative;
            margin-bottom: 3rem;
            color: var(--primary-color);
        }
        .section-title::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -10px;
            width: 60px;
            height: 4px;
            background: var(--secondary-color);
        }
        .card-hover {
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
        }
        .btn-primary:hover {
            background-color: #004494;
            border-color: #004494;
        }
        .friend-links a.flink {
            display: inline-block;
            margin: 5px 15px;
            padding: 8px 20px;
            background: var(--light-color);
            border-radius: 20px;
            color: var(--dark-color);
            text-decoration: none;
            transition: all 0.3s;
        }
        .friend-links a.flink:hover {
            background: var(--primary-color);
            color: white;
        }
        footer {
            background: var(--dark-color);
            color: white;
        }
        .contact-info i {
            color: var(--secondary-color);
            margin-right: 10px;
        }
        img {
            max-width: 100%;
            height: auto;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 100px 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }