:root {
            --primary-color: #1a365d;
            --secondary-color: #2d3748;
            --accent-color: #3182ce;
            --light-color: #f7fafc;
            --dark-color: #2d3748;
            --success-color: #38a169;
            --warning-color: #d69e2e;
        }
        body {
            font-family: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
            color: var(--dark-color);
            line-height: 1.7;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--primary-color);
        }
        .navbar-brand {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-color) !important;
        }
        .nav-link {
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .nav-link:hover {
            color: var(--accent-color) !important;
        }
        .hero-section {
            background: linear-gradient(rgba(26, 54, 93, 0.85), rgba(26, 54, 93, 0.9)), url('https://images.unsplash.com/photo-1575361204480-aadea25e6e68?ixlib=rb-4.0.3&auto=format&fit=crop&w=2071&q=80') no-repeat center center;
            background-size: cover;
            color: white;
            padding: 120px 0;
        }
        .hero-section h1 {
            color: white;
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 40px;
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 70px;
            height: 4px;
            background-color: var(--accent-color);
        }
        .card {
            border: none;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.08);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        .service-icon {
            width: 80px;
            height: 80px;
            background-color: rgba(49, 130, 206, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 2rem;
            color: var(--accent-color);
        }
        .stats-counter {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary-color);
        }
        .stats-label {
            font-size: 1.1rem;
            color: var(--secondary-color);
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        .feature-box {
            padding: 30px;
            border-radius: 12px;
            background-color: white;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.06);
            height: 100%;
            transition: all 0.3s ease;
        }
        .feature-box:hover {
            box-shadow: 0 12px 25px rgba(0, 0, 0, 0.1);
            transform: translateY(-5px);
        }
        .feature-icon {
            font-size: 2.5rem;
            color: var(--accent-color);
            margin-bottom: 20px;
        }
        .testimonial-card {
            background-color: var(--light-color);
            border-radius: 12px;
            padding: 30px;
            margin: 15px 0;
        }
        .testimonial-img {
            width: 70px;
            height: 70px;
            border-radius: 50%;
            object-fit: cover;
            margin-right: 20px;
        }
        .news-card {
            border-radius: 12px;
            overflow: hidden;
            transition: all 0.3s ease;
        }
        .news-card:hover {
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        .news-img {
            height: 200px;
            object-fit: cover;
            width: 100%;
        }
        .news-date {
            position: absolute;
            top: 15px;
            left: 15px;
            background-color: var(--accent-color);
            color: white;
            padding: 5px 15px;
            border-radius: 20px;
            font-size: 0.85rem;
        }
        .btn-primary {
            background-color: var(--accent-color);
            border: none;
            padding: 12px 30px;
            border-radius: 30px;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .btn-primary:hover {
            background-color: var(--primary-color);
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(49, 130, 206, 0.2);
        }
        .footer {
            background-color: var(--primary-color);
            color: white;
            padding: 60px 0 20px;
        }
        .footer h5 {
            color: white;
            margin-bottom: 25px;
            font-size: 1.2rem;
        }
        .footer a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        .footer a:hover {
            color: white;
        }
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            margin-top: 40px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
        }
        .flink {
            display: inline-block;
            background-color: rgba(255, 255, 255, 0.1);
            color: white;
            padding: 8px 20px;
            border-radius: 30px;
            margin: 5px;
            text-decoration: none;
            transition: all 0.3s ease;
            font-size: 0.9rem;
        }
        .flink:hover {
            background-color: var(--accent-color);
            color: white;
            transform: translateY(-3px);
        }
        .contact-info {
            background-color: rgba(255, 255, 255, 0.05);
            padding: 20px;
            border-radius: 12px;
            margin-bottom: 20px;
        }
        .contact-icon {
            font-size: 1.5rem;
            color: var(--accent-color);
            margin-right: 15px;
        }
        .form-control {
            border-radius: 8px;
            padding: 12px 15px;
            border: 1px solid #e2e8f0;
        }
        .form-control:focus {
            border-color: var(--accent-color);
            box-shadow: 0 0 0 0.2rem rgba(49, 130, 206, 0.25);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: var(--accent-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            font-size: 1.2rem;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: var(--primary-color);
            color: white;
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .hero-section {
                padding: 80px 0;
            }
            .stats-counter {
                font-size: 2rem;
            }
        }
        .article-content {
            font-size: 1.1rem;
            line-height: 1.8;
        }
        .article-content h3 {
            margin-top: 30px;
            margin-bottom: 15px;
        }
        .article-content p {
            margin-bottom: 20px;
        }
        .highlight-box {
            background-color: rgba(49, 130, 206, 0.1);
            border-left: 4px solid var(--accent-color);
            padding: 25px;
            border-radius: 0 8px 8px 0;
            margin: 30px 0;
        }