:root {
            --primary-color: #0a3d62;
            --secondary-color: #1e90ff;
            --accent-color: #ff6b6b;
            --light-color: #f8f9fa;
            --dark-color: #343a40;
        }
        body {
            font-family: "Microsoft YaHei", sans-serif;
            color: #333;
            line-height: 1.6;
        }
        .navbar-brand {
            font-weight: bold;
            font-size: 1.8rem;
            color: var(--primary-color);
        }
        .hero-section {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
            color: white;
            padding: 100px 0;
            text-align: center;
        }
        .hero-section h1 {
            font-size: 3.5rem;
            margin-bottom: 20px;
        }
        .section-title {
            text-align: center;
            margin-bottom: 50px;
            color: var(--primary-color);
            position: relative;
        }
        .section-title::after {
            content: '';
            position: absolute;
            width: 80px;
            height: 4px;
            background: var(--accent-color);
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
        }
        .card {
            border: none;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            transition: transform 0.3s ease;
            margin-bottom: 30px;
        }
        .card:hover {
            transform: translateY(-10px);
        }
        .card-img-top {
            border-radius: 15px 15px 0 0;
            height: 200px;
            object-fit: cover;
        }
        .btn-primary {
            background-color: var(--secondary-color);
            border: none;
            padding: 12px 30px;
            border-radius: 30px;
            font-weight: bold;
            transition: background-color 0.3s ease;
        }
        .btn-primary:hover {
            background-color: var(--primary-color);
        }
        .friendlink {
            background-color: var(--light-color);
            padding: 60px 0;
        }
        .flink {
            display: inline-block;
            margin: 10px 15px;
            padding: 10px 20px;
            background: white;
            border-radius: 50px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            text-decoration: none;
            color: var(--dark-color);
            transition: all 0.3s ease;
        }
        .flink:hover {
            background: var(--secondary-color);
            color: white;
            transform: scale(1.05);
        }
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 40px 0;
        }
        .social-icons a {
            color: white;
            margin: 0 10px;
            font-size: 1.5rem;
            transition: color 0.3s ease;
        }
        .social-icons a:hover {
            color: var(--secondary-color);
        }
        .content-heavy {
            text-align: justify;
            margin-bottom: 30px;
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .section-title {
                font-size: 2rem;
            }
        }