:root {
            --primary-color: #0066cc;
            --secondary-color: #3399ff;
            --accent-color: #00a86b;
            --dark-color: #003366;
            --light-color: #f8f9fa;
            --text-color: #333333;
            --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', Arial, sans-serif;
            color: var(--text-color);
            line-height: 1.7;
            overflow-x: hidden;
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.98);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
            padding: 15px 0;
            transition: var(--transition);
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--dark-color);
        }
        .navbar-brand span {
            color: var(--primary-color);
        }
        .nav-link {
            font-weight: 500;
            color: var(--dark-color);
            margin: 0 10px;
            padding: 8px 15px !important;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        .nav-link:hover, .nav-link.active {
            background-color: rgba(0, 102, 204, 0.1);
            color: var(--primary-color);
        }
        .hero-section {
            background: linear-gradient(rgba(0, 51, 102, 0.85), rgba(0, 102, 204, 0.85)), url('https://images.unsplash.com/photo-1522720833375-9c27ffb02a5e?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 150px 0 100px;
            margin-top: 76px;
        }
        .hero-title {
            font-size: 3.2rem;
            font-weight: 700;
            margin-bottom: 25px;
            text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
        }
        .hero-subtitle {
            font-size: 1.3rem;
            margin-bottom: 35px;
            opacity: 0.9;
        }
        .feature-card {
            background: white;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            padding: 30px;
            height: 100%;
            transition: var(--transition);
            border-top: 4px solid var(--primary-color);
        }
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .feature-icon {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 20px;
        }
        .product-card {
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--box-shadow);
            transition: var(--transition);
            background: white;
            height: 100%;
        }
        .product-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 25px rgba(0,0,0,0.15);
        }
        .product-img {
            height: 220px;
            object-fit: cover;
            width: 100%;
        }
        .product-body {
            padding: 25px;
        }
        friendlink {
            display: block;
            width: 100%;
            margin: 30px 0;
            padding: 30px 0;
            background-color: #f9f9f9;
            border-radius: var(--border-radius);
        }
        .flink {
            display: inline-block;
            background: white;
            padding: 12px 25px;
            margin: 8px;
            border-radius: 50px;
            box-shadow: 0 3px 10px rgba(0,0,0,0.08);
            color: var(--dark-color);
            text-decoration: none;
            transition: var(--transition);
            font-weight: 500;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }
        .footer {
            background-color: var(--dark-color);
            color: white;
            padding: 70px 0 20px;
        }
        .footer a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            transition: var(--transition);
        }
        .footer a:hover {
            color: white;
            padding-left: 5px;
        }
        .footer-divider {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            margin: 40px 0 20px;
        }
        @media (max-width: 992px) {
            .hero-title {
                font-size: 2.5rem;
            }
            .hero-section {
                padding: 120px 0 80px;
            }
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 2rem;
            }
            .hero-subtitle {
                font-size: 1.1rem;
            }
            .navbar-brand {
                font-size: 1.5rem;
            }
        }
        .fade-in {
            animation: fadeIn 1s ease-in-out;
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .stat-number {
            font-size: 2.8rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 5px;
        }
        .stat-label {
            font-size: 1.1rem;
            color: var(--text-color);
            font-weight: 500;
        }
        .contact-form {
            background: white;
            padding: 40px;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
        }
        .form-control, .form-select {
            padding: 12px 15px;
            border-radius: var(--border-radius);
            border: 1px solid #ddd;
            margin-bottom: 20px;
            transition: var(--transition);
        }
        .form-control:focus, .form-select:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 0.25rem rgba(0, 102, 204, 0.25);
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 12px 30px;
            border-radius: var(--border-radius);
            font-weight: 500;
            transition: var(--transition);
        }
        .btn-primary:hover {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            transform: translateY(-2px);
        }
        .map-container {
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--box-shadow);
            height: 100%;
        }
        .cert-badge {
            display: inline-block;
            background: var(--light-color);
            padding: 8px 20px;
            border-radius: 50px;
            margin: 5px;
            font-size: 0.9rem;
            border-left: 3px solid var(--accent-color);
        }
        .timeline-item {
            padding: 20px;
            margin-bottom: 30px;
            border-left: 3px solid var(--primary-color);
            background-color: rgba(0, 102, 204, 0.05);
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        .timeline-year {
            font-weight: 700;
            color: var(--primary-color);
            font-size: 1.2rem;
            margin-bottom: 10px;
        }