body {
            font-family: 'Microsoft YaHei', sans-serif;
            padding-top: 76px;
        }
        .navbar-brand {
            font-weight: bold;
            font-size: 1.2rem;
        }
        section {
            padding: 80px 0;
        }
        .bg-hero {
            background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('https://images.unsplash.com/photo-1556056504-5c7696c4c28d?ixlib=rb-4.0.3&auto=format&fit=crop&w=1600&q=80') center/cover no-repeat;
            color: white;
            min-height: 90vh;
            display: flex;
            align-items: center;
        }
        .card {
            border: none;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            transition: transform 0.3s;
            margin-bottom: 30px;
        }
        .card:hover {
            transform: translateY(-10px);
        }
        .table-hover tbody tr:hover {
            background-color: #f8f9fa;
        }
        .friendlink a.flink {
            display: inline-block;
            padding: 10px 20px;
            margin: 5px;
            background: #f8f9fa;
            border-radius: 5px;
            text-decoration: none;
            color: #333;
            border: 1px solid #ddd;
            transition: all 0.3s;
        }
        .friendlink a.flink:hover {
            background: #007bff;
            color: white;
            border-color: #007bff;
        }
        footer {
            background: #343a40;
            color: white;
        }
        .form-control:focus {
            border-color: #007bff;
            box-shadow: 0 0 0 0.25rem rgba(0,123,255,0.25);
        }
        .img-thumbnail {
            border-radius: 10px;
            margin: 15px 0;
        }
        .badge-custom {
            font-size: 0.9rem;
            padding: 5px 10px;
        }
        @media (max-width: 768px) {
            section {
                padding: 50px 0;
            }
            .display-4 {
                font-size: 2.5rem;
            }
        }