:root {
            --primary-color: #1e3a8a;
            --secondary-color: #0ea5e9;
            --accent-color: #f59e0b;
            --dark-color: #1e293b;
            --light-color: #f8fafc;
            --gray-color: #64748b;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            color: var(--dark-color);
            line-height: 1.7;
            overflow-x: hidden;
        }
        .hero-section {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
            color: white;
            padding: 6rem 0;
            position: relative;
            overflow: hidden;
        }
        .hero-section h1 {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
        }
        .hero-section .lead {
            font-size: 1.4rem;
            max-width: 700px;
            margin: 0 auto 2rem;
        }
        .section-title {
            color: var(--primary-color);
            font-weight: 700;
            margin-bottom: 2.5rem;
            position: relative;
            display: inline-block;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 0;
            width: 60px;
            height: 4px;
            background: var(--accent-color);
            border-radius: 2px;
        }
        .card {
            border: none;
            border-radius: 12px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            height: 100%;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
        }
        .card-icon {
            font-size: 3rem;
            color: var(--secondary-color);
            margin-bottom: 1.5rem;
        }
        .data-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.5rem;
        }
        .data-item {
            background: var(--light-color);
            border-left: 5px solid var(--accent-color);
            padding: 1.5rem;
            border-radius: 8px;
        }
        .news-card img {
            height: 200px;
            object-fit: cover;
            border-top-left-radius: 12px;
            border-top-right-radius: 12px;
        }
        .news-card .card-body {
            padding: 1.5rem;
        }
        .friendlink {
            background: #f1f5f9;
            padding: 4rem 0;
        }
        .flink {
            display: inline-block;
            padding: 0.75rem 1.5rem;
            margin: 0.5rem;
            background: white;
            border-radius: 50px;
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 600;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            border-color: var(--accent-color);
            transform: scale(1.05);
        }
        .contact-info li {
            margin-bottom: 1rem;
            font-size: 1.1rem;
        }
        .contact-info i {
            color: var(--secondary-color);
            width: 30px;
        }
        footer {
            background: var(--dark-color);
            color: white;
            padding: 3rem 0 1.5rem;
        }
        footer a {
            color: #cbd5e1;
            text-decoration: none;
            transition: color 0.3s;
        }
        footer a:hover {
            color: white;
            text-decoration: underline;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .navbar-nav .nav-link {
            font-weight: 600;
            color: var(--dark-color) !important;
            padding: 0.5rem 1rem;
            border-radius: 5px;
            transition: var(--transition);
        }
        .navbar-nav .nav-link:hover, .navbar-nav .nav-link.active {
            background: var(--primary-color);
            color: white !important;
        }
        .btn-primary {
            background: var(--primary-color);
            border: none;
            padding: 0.75rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-primary:hover {
            background: var(--secondary-color);
            transform: translateY(-3px);
        }
        .btn-outline-light {
            border: 2px solid white;
            color: white;
            padding: 0.75rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-outline-light:hover {
            background: white;
            color: var(--primary-color);
        }
        img {
            max-width: 100%;
            height: auto;
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .hero-section .lead {
                font-size: 1.1rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }