:root {
            --primary-color: #003366;
            --secondary-color: #d4af37;
            --accent-color: #00509e;
            --light-color: #f8f9fa;
            --dark-color: #212529;
            --success-color: #28a745;
            --border-radius: 8px;
            --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            color: #333;
            line-height: 1.6;
            overflow-x: hidden;
        }
        .container-fluid {
            padding-left: 15px;
            padding-right: 15px;
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95) !important;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            padding: 15px 0;
            transition: var(--transition);
        }
        .navbar-brand {
            color: var(--primary-color) !important;
            font-weight: 700;
            font-size: 1.8rem;
        }
        .navbar-brand span {
            color: var(--secondary-color);
        }
        .nav-link {
            color: var(--dark-color) !important;
            font-weight: 500;
            margin: 0 10px;
            transition: var(--transition);
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary-color) !important;
            transform: translateY(-2px);
        }
        .hero-section {
            background: linear-gradient(rgba(0, 51, 102, 0.9), rgba(0, 80, 158, 0.8)), url('https://images.unsplash.com/photo-1620712943543-bcc4688e7485?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 150px 0 100px;
            position: relative;
        }
        .hero-title {
            font-size: 3.5rem;
            font-weight: 700;
            margin-bottom: 30px;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
        }
        .hero-subtitle {
            font-size: 1.4rem;
            margin-bottom: 40px;
            max-width: 800px;
        }
        .card {
            border: none;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            transition: var(--transition);
            height: 100%;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        .card-icon {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 20px;
        }
        .service-card {
            border-top: 5px solid var(--primary-color);
            padding: 30px 20px;
        }
        .product-card {
            overflow: hidden;
        }
        .product-img {
            height: 200px;
            object-fit: cover;
            transition: var(--transition);
        }
        .product-card:hover .product-img {
            transform: scale(1.05);
        }
        .news-card {
            border-left: 4px solid var(--primary-color);
        }
        .news-date {
            background-color: var(--primary-color);
            color: white;
            padding: 8px 15px;
            border-radius: var(--border-radius);
            display: inline-block;
            margin-bottom: 15px;
        }
        .partner-logo {
            height: 80px;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 15px;
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            transition: var(--transition);
        }
        .partner-logo:hover {
            transform: translateY(-5px);
        }
        .partner-logo img {
            max-width: 100%;
            max-height: 50px;
            filter: grayscale(100%);
            transition: var(--transition);
        }
        .partner-logo:hover img {
            filter: grayscale(0%);
        }
        friendlink {
            display: block;
            padding: 30px 0;
            background-color: #f8f9fa;
            border-top: 1px solid #dee2e6;
            border-bottom: 1px solid #dee2e6;
        }
        .flink {
            display: inline-block;
            margin: 5px 15px;
            padding: 8px 20px;
            background-color: white;
            border-radius: 30px;
            color: var(--primary-color);
            text-decoration: none;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
            transition: var(--transition);
            border: 1px solid #e9ecef;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }
        footer {
            background-color: var(--primary-color);
            color: rgba(255, 255, 255, 0.85);
            padding-top: 60px;
        }
        .footer-title {
            color: white;
            font-weight: 600;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-title:after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 50px;
            height: 3px;
            background-color: var(--secondary-color);
        }
        .footer-link {
            color: rgba(255, 255, 255, 0.75);
            text-decoration: none;
            transition: var(--transition);
            display: block;
            margin-bottom: 10px;
        }
        .footer-link:hover {
            color: var(--secondary-color);
            padding-left: 5px;
        }
        .contact-info li {
            margin-bottom: 15px;
            display: flex;
            align-items: flex-start;
        }
        .contact-info i {
            color: var(--secondary-color);
            margin-right: 10px;
            margin-top: 5px;
        }
        .copyright {
            background-color: rgba(0, 0, 0, 0.2);
            padding: 20px 0;
            margin-top: 40px;
            text-align: center;
        }
        .btn-primary-custom {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            color: white;
            padding: 12px 30px;
            border-radius: 30px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-primary-custom:hover {
            background-color: var(--accent-color);
            border-color: var(--accent-color);
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0, 80, 158, 0.3);
        }
        .btn-secondary-custom {
            background-color: transparent;
            border-color: white;
            color: white;
            padding: 12px 30px;
            border-radius: 30px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-secondary-custom:hover {
            background-color: white;
            color: var(--primary-color);
            transform: translateY(-3px);
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .hero-subtitle {
                font-size: 1.2rem;
            }
            .navbar-nav {
                text-align: center;
                padding-top: 15px;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }
        @media (max-width: 576px) {
            .hero-title {
                font-size: 2rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
        }
        .fade-in {
            animation: fadeIn 1s ease-out;
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .section-divider {
            height: 4px;
            width: 80px;
            background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
            margin: 0 auto 30px;
            border-radius: 2px;
        }
        .breadcrumb {
            background-color: transparent;
            padding: 0;
        }
        .breadcrumb-item a {
            color: var(--primary-color);
            text-decoration: none;
        }
        .form-control-custom {
            border-radius: var(--border-radius);
            padding: 12px 15px;
            border: 1px solid #ced4da;
            transition: var(--transition);
        }
        .form-control-custom:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 0.25rem rgba(0, 51, 102, 0.25);
        }
        .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;
            font-size: 1.2rem;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
        }
        .back-to-top.show {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: var(--accent-color);
            transform: translateY(-5px);
        }
        .loading-spinner {
            display: inline-block;
            width: 2rem;
            height: 2rem;
            border: 3px solid rgba(0, 51, 102, 0.3);
            border-radius: 50%;
            border-top-color: var(--primary-color);
            animation: spin 1s ease-in-out infinite;
        }
        @keyframes spin {
            to { transform: rotate(360deg); }
        }
        .progress {
            height: 8px;
            border-radius: 4px;
            margin-bottom: 15px;
        }
        .progress-bar {
            background-color: var(--primary-color);
            border-radius: 4px;
        }
        .timeline-item {
            position: relative;
            padding-left: 30px;
            margin-bottom: 30px;
        }
        .timeline-item:before {
            content: '';
            position: absolute;
            left: 0;
            top: 5px;
            width: 15px;
            height: 15px;
            border-radius: 50%;
            background-color: var(--primary-color);
        }
        .timeline-item:after {
            content: '';
            position: absolute;
            left: 7px;
            top: 20px;
            width: 1px;
            height: calc(100% + 10px);
            background-color: #dee2e6;
        }
        .timeline-item:last-child:after {
            display: none;
        }
        .badge-custom {
            background-color: var(--primary-color);
            color: white;
            padding: 5px 12px;
            border-radius: 20px;
            font-weight: 500;
        }