:root {
            --primary-color: #0056b3;
            --secondary-color: #28a745;
            --accent-color: #ffc107;
            --dark-color: #343a40;
            --light-color: #f8f9fa;
            --border-radius: 8px;
            --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: #333;
            line-height: 1.6;
            overflow-x: hidden;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .nav-link {
            font-weight: 500;
            padding: 0.5rem 1.2rem !important;
            transition: var(--transition);
            border-radius: var(--border-radius);
        }
        .nav-link:hover, .nav-link.active {
            background-color: rgba(0, 86, 179, 0.1);
            color: var(--primary-color) !important;
        }
        .hero-section {
            background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('https://images.unsplash.com/photo-1600566752355-35792bedcfea?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 120px 0;
            margin-top: 76px;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 40px;
            text-align: center;
            font-weight: 700;
            color: var(--dark-color);
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background-color: var(--primary-color);
            border-radius: 2px;
        }
        .service-card, .news-card, .case-card {
            border: none;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            transition: var(--transition);
            height: 100%;
            overflow: hidden;
        }
        .service-card:hover, .news-card:hover, .case-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(0, 86, 179, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            color: var(--primary-color);
            font-size: 2rem;
        }
        .stats-section {
            background: linear-gradient(135deg, var(--primary-color), #003d82);
            color: white;
            padding: 80px 0;
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .flink {
            display: inline-block;
            padding: 8px 20px;
            margin: 5px 10px;
            background-color: var(--light-color);
            border: 1px solid #dee2e6;
            border-radius: 30px;
            color: var(--dark-color);
            text-decoration: none;
            transition: var(--transition);
            font-size: 0.95rem;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
            transform: translateY(-3px);
        }
        .footer {
            background-color: var(--dark-color);
            color: #adb5bd;
            padding-top: 60px;
        }
        .footer a {
            color: #adb5bd;
            text-decoration: none;
            transition: color 0.2s;
        }
        .footer a:hover {
            color: white;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .contact-info li {
            margin-bottom: 15px;
            display: flex;
            align-items: flex-start;
        }
        .contact-info i {
            margin-top: 5px;
            margin-right: 12px;
            color: var(--accent-color);
            min-width: 20px;
        }
        .copyright {
            border-top: 1px solid #495057;
            padding: 20px 0;
            margin-top: 40px;
            font-size: 0.9rem;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 1000;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: #004494;
            color: white;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 80px 0;
                margin-top: 66px;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .stat-number {
                font-size: 2.2rem;
            }
            .navbar-nav {
                text-align: center;
                background-color: white;
                border-radius: var(--border-radius);
                padding: 10px 0;
                box-shadow: var(--box-shadow);
            }
        }
        .form-control:focus, .form-select:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 0.25rem rgba(0, 86, 179, 0.25);
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 10px 30px;
            font-weight: 500;
            border-radius: var(--border-radius);
        }
        .btn-primary:hover {
            background-color: #004494;
            border-color: #004494;
        }
        .btn-outline-primary {
            color: var(--primary-color);
            border-color: var(--primary-color);
        }
        .btn-outline-primary:hover {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
        }
        .process-step {
            text-align: center;
            padding: 20px;
            position: relative;
        }
        .process-step .step-number {
            width: 50px;
            height: 50px;
            background-color: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 1.3rem;
            margin: 0 auto 15px;
        }
        .partner-logo {
            filter: grayscale(100%);
            opacity: 0.7;
            transition: var(--transition);
            max-height: 60px;
            width: auto;
        }
        .partner-logo:hover {
            filter: grayscale(0);
            opacity: 1;
        }