:root {
            --primary-color: #1a5fb4;
            --secondary-color: #ff6b35;
            --dark-color: #2c3e50;
            --light-color: #f8f9fa;
            --success-color: #28a745;
            --warning-color: #ffc107;
        }
        body {
            font-family: "Microsoft YaHei", "Segoe UI", sans-serif;
            color: #333;
            line-height: 1.6;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--dark-color);
        }
        a {
            text-decoration: none;
            color: var(--primary-color);
            transition: all 0.3s ease;
        }
        a:hover {
            color: var(--secondary-color);
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 10px 25px;
            border-radius: 30px;
            font-weight: 600;
        }
        .btn-primary:hover {
            background-color: #0d4a9e;
            border-color: #0d4a9e;
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .btn-secondary {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            padding: 10px 25px;
            border-radius: 30px;
            font-weight: 600;
        }
        .btn-secondary:hover {
            background-color: #e05a2b;
            border-color: #e05a2b;
            transform: translateY(-3px);
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 4px 12px rgba(0,0,0,0.08);
            padding: 15px 0;
            transition: all 0.3s ease;
        }
        .navbar-brand {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-color);
        }
        .navbar-nav .nav-link {
            font-weight: 600;
            padding: 8px 15px;
            border-radius: 20px;
            margin: 0 5px;
        }
        .navbar-nav .nav-link:hover, .navbar-nav .nav-link.active {
            background-color: var(--primary-color);
            color: white;
        }
        .hero {
            background: linear-gradient(135deg, var(--primary-color) 0%, #2c3e50 100%);
            color: white;
            padding: 120px 0 80px;
            position: relative;
            overflow: hidden;
        }
        .hero h1 {
            font-size: 3.5rem;
            color: white;
            margin-bottom: 20px;
        }
        .hero p {
            font-size: 1.2rem;
            margin-bottom: 30px;
            opacity: 0.9;
        }
        .hero .btn {
            margin: 10px;
        }
        .section-title {
            text-align: center;
            margin-bottom: 60px;
            position: relative;
        }
        .section-title h2 {
            display: inline-block;
            padding-bottom: 15px;
            position: relative;
        }
        .section-title h2:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--secondary-color);
        }
        .feature-box {
            background: white;
            border-radius: 15px;
            padding: 30px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.05);
            text-align: center;
            height: 100%;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border: 1px solid #eee;
        }
        .feature-box:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(0,0,0,0.1);
        }
        .feature-box i {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 20px;
        }
        .news-card {
            border: none;
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 8px 20px rgba(0,0,0,0.06);
            transition: transform 0.3s ease;
            height: 100%;
        }
        .news-card:hover {
            transform: translateY(-10px);
        }
        .news-card img {
            height: 200px;
            object-fit: cover;
            width: 100%;
        }
        .news-card .card-body {
            padding: 25px;
        }
        .contact-info {
            background: var(--light-color);
            border-radius: 15px;
            padding: 40px;
            height: 100%;
        }
        .contact-info i {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 20px;
        }
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 60px 0 20px;
        }
        footer a {
            color: #ddd;
        }
        footer a:hover {
            color: white;
        }
        .footer-links h5 {
            color: white;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-links h5:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 3px;
            background: var(--secondary-color);
        }
        .copyright {
            border-top: 1px solid #444;
            padding-top: 20px;
            margin-top: 40px;
            text-align: center;
            font-size: 0.9rem;
            color: #aaa;
        }
        .friendlink {
            background-color: #f0f8ff;
            padding: 50px 0;
        }
        .flink {
            display: inline-block;
            background: white;
            padding: 10px 20px;
            margin: 8px;
            border-radius: 30px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: scale(1.05);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            z-index: 1000;
            opacity: 0.8;
            transition: all 0.3s ease;
        }
        .back-to-top:hover {
            opacity: 1;
            transform: translateY(-5px);
        }
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.5rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .section-title h2 {
                font-size: 1.8rem;
            }
            .navbar-brand {
                font-size: 1.5rem;
            }
        }