:root {
            --primary-color: #1e3a8a;
            --secondary-color: #dc2626;
            --accent-color: #f59e0b;
            --light-color: #f8fafc;
            --dark-color: #0f172a;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            color: #333;
            line-height: 1.6;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color);
        }
        .hero-section {
            background: linear-gradient(rgba(30, 58, 138, 0.9), rgba(30, 58, 138, 0.7)), url('https://images.unsplash.com/photo-1556056504-5c7696c4c28d?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 8rem 0;
        }
        .section-title {
            color: var(--primary-color);
            border-left: 5px solid var(--secondary-color);
            padding-left: 15px;
            margin-bottom: 2rem;
            font-weight: 700;
        }
        .card {
            border: none;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            transition: transform 0.3s ease;
            height: 100%;
        }
        .card:hover {
            transform: translateY(-10px);
        }
        .card-img-top {
            height: 200px;
            object-fit: cover;
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 10px 25px;
            font-weight: 600;
        }
        .btn-primary:hover {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
        }
        .footer {
            background-color: var(--dark-color);
            color: white;
            padding: 3rem 0;
        }
        .friendlink a.flink {
            display: inline-block;
            background: var(--light-color);
            color: var(--primary-color);
            padding: 8px 20px;
            margin: 5px;
            border-radius: 30px;
            text-decoration: none;
            border: 1px solid #ddd;
            transition: all 0.3s;
        }
        .friendlink a.flink:hover {
            background: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }
        .table-hover tbody tr:hover {
            background-color: rgba(30, 58, 138, 0.1);
        }
        .icon-box {
            width: 60px;
            height: 60px;
            background: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            margin: 0 auto 1rem;
        }
        .contact-info li {
            margin-bottom: 1rem;
            font-size: 1.1rem;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 4rem 0;
            }
            .display-4 {
                font-size: 2.5rem;
            }
        }