:root {
            --primary-color: #1e3a8a;
            --secondary-color: #dc2626;
            --accent-color: #fbbf24;
            --light-bg: #f8fafc;
            --dark-text: #1f2937;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            color: var(--dark-text);
            line-height: 1.8;
            overflow-x: hidden;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color);
        }
        .nav-link {
            font-weight: 500;
            transition: color 0.3s;
        }
        .nav-link:hover {
            color: var(--secondary-color);
        }
        .hero-section {
            background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('https://images.unsplash.com/photo-1575361204480-aadea25e6e68?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 120px 0;
        }
        .hero-section h1 {
            font-size: 3.5rem;
            font-weight: 800;
            text-shadow: 2px 2px 8px rgba(0,0,0,0.5);
        }
        .section-title {
            color: var(--primary-color);
            border-left: 5px solid var(--accent-color);
            padding-left: 15px;
            margin-bottom: 40px;
            font-weight: 700;
        }
        .card {
            border: none;
            border-radius: 15px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
            transition: transform 0.3s, box-shadow 0.3s;
            height: 100%;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
        }
        .card-img-top {
            border-radius: 15px 15px 0 0;
            height: 200px;
            object-fit: cover;
        }
        .btn-primary {
            background-color: var(--primary-color);
            border: none;
            padding: 12px 30px;
            border-radius: 50px;
            font-weight: 600;
            transition: background-color 0.3s;
        }
        .btn-primary:hover {
            background-color: var(--secondary-color);
        }
        .friendlink .flink {
            display: inline-block;
            margin: 10px 20px;
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 500;
            padding: 8px 20px;
            border: 2px solid var(--primary-color);
            border-radius: 50px;
            transition: all 0.3s;
        }
        .friendlink .flink:hover {
            background-color: var(--primary-color);
            color: white;
        }
        footer {
            background-color: var(--primary-color);
            color: white;
            padding-top: 50px;
        }
        footer a {
            color: var(--accent-color);
            text-decoration: none;
        }
        footer a:hover {
            text-decoration: underline;
        }
        .icon-box {
            width: 60px;
            height: 60px;
            background-color: var(--accent-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
        }
        .icon-box i {
            font-size: 1.8rem;
            color: var(--primary-color);
        }
        .news-item {
            border-bottom: 1px solid #e5e7eb;
            padding-bottom: 20px;
            margin-bottom: 20px;
        }
        .news-item:last-child {
            border-bottom: none;
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .hero-section {
                padding: 80px 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }