body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            line-height: 1.8;
            color: #333;
        }
        .navbar-brand {
            font-weight: bold;
            font-size: 1.8rem;
            color: #0d6efd !important;
        }
        .hero-section {
            background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('https://images.unsplash.com/photo-1533473359331-0135ef1b58bf?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') no-repeat center center/cover;
            color: white;
            padding: 120px 0;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 40px;
            text-align: center;
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: #0d6efd;
        }
        .card {
            border: none;
            border-radius: 15px;
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        .card-img-top {
            height: 220px;
            object-fit: cover;
        }
        .btn-primary {
            background-color: #0d6efd;
            border: none;
            padding: 12px 30px;
            border-radius: 30px;
            font-weight: bold;
            transition: background-color 0.3s ease;
        }
        .btn-primary:hover {
            background-color: #0b5ed7;
        }
        .friend-links {
            background-color: #f8f9fa;
            padding: 40px 0;
        }
        .flink {
            display: inline-block;
            margin: 10px 15px;
            padding: 10px 20px;
            background: white;
            border-radius: 8px;
            text-decoration: none;
            color: #333;
            border: 1px solid #dee2e6;
            transition: all 0.3s ease;
        }
        .flink:hover {
            background: #0d6efd;
            color: white;
            border-color: #0d6efd;
        }
        footer {
            background-color: #212529;
            color: #adb5bd;
            padding: 40px 0 20px;
        }
        footer a {
            color: #adb5bd;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        footer a:hover {
            color: white;
        }
        .contact-info i {
            color: #0d6efd;
            margin-right: 10px;
        }
        .sticky-top {
            backdrop-filter: blur(10px);
            background-color: rgba(255, 255, 255, 0.95);
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.2rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }