:root {
            --primary-color: #1a3a5f;
            --secondary-color: #c9a96e;
            --accent-color: #2c5282;
            --light-color: #f8f9fa;
            --dark-color: #212529;
            --gray-color: #6c757d;
        }
        body {
            font-family: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
            line-height: 1.8;
            color: #333;
        }
        h1, h2, h3, h4, h5 {
            font-weight: 700;
            color: var(--primary-color);
        }
        .hero-section {
            background: linear-gradient(rgba(26, 58, 95, 0.85), rgba(26, 58, 95, 0.9)), url('https://images.unsplash.com/photo-1581094794329-c8112a89af12?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') no-repeat center center;
            background-size: cover;
            color: white;
            padding: 180px 0 120px;
        }
        .section-title {
            position: relative;
            padding-bottom: 20px;
            margin-bottom: 50px;
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background-color: var(--secondary-color);
        }
        .section-title.text-start:after {
            left: 0;
            transform: none;
        }
        .feature-card {
            border: none;
            border-radius: 10px;
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
        }
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        .feature-icon {
            font-size: 3rem;
            color: var(--secondary-color);
            margin-bottom: 20px;
        }
        .product-card {
            border: 1px solid #e9ecef;
            border-radius: 8px;
            overflow: hidden;
            transition: all 0.3s ease;
        }
        .product-card:hover {
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.08);
            border-color: var(--secondary-color);
        }
        .product-img {
            height: 220px;
            object-fit: cover;
            width: 100%;
        }
        .btn-primary-custom {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 12px 30px;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .btn-primary-custom:hover {
            background-color: var(--accent-color);
            border-color: var(--accent-color);
            transform: translateY(-2px);
        }
        .btn-secondary-custom {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            color: white;
            padding: 12px 30px;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .btn-secondary-custom:hover {
            background-color: #b8975d;
            border-color: #b8975d;
            color: white;
            transform: translateY(-2px);
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.98);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
            padding: 15px 0;
            transition: all 0.3s ease;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color);
        }
        .navbar-brand span {
            color: var(--secondary-color);
        }
        .nav-link {
            font-weight: 600;
            color: var(--primary-color);
            margin: 0 10px;
            transition: color 0.3s ease;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--secondary-color);
        }
        .contact-info {
            background-color: var(--light-color);
            border-radius: 10px;
            padding: 30px;
            height: 100%;
        }
        .contact-icon {
            font-size: 1.5rem;
            color: var(--secondary-color);
            margin-right: 15px;
        }
        footer {
            background-color: var(--primary-color);
            color: white;
            padding: 80px 0 30px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            transition: color 0.3s ease;
            display: block;
            margin-bottom: 10px;
        }
        .footer-links a:hover {
            color: var(--secondary-color);
        }
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            margin-top: 50px;
            color: rgba(255, 255, 255, 0.7);
        }
        .flink {
            display: inline-block;
            background-color: white;
            color: var(--primary-color);
            padding: 10px 20px;
            margin: 5px 10px;
            border-radius: 5px;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s ease;
            border: 1px solid #e9ecef;
        }
        .flink:hover {
            background-color: var(--secondary-color);
            color: white;
            transform: translateY(-3px);
            border-color: var(--secondary-color);
        }
        .timeline {
            position: relative;
            padding-left: 30px;
        }
        .timeline:before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 4px;
            background-color: var(--secondary-color);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 30px;
            padding-left: 20px;
        }
        .timeline-item:before {
            content: '';
            position: absolute;
            left: -33px;
            top: 5px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background-color: var(--secondary-color);
            border: 3px solid white;
            box-shadow: 0 0 0 3px var(--secondary-color);
        }
        .certificate-img {
            border: 1px solid #e9ecef;
            border-radius: 8px;
            padding: 15px;
            background-color: white;
            transition: transform 0.3s ease;
        }
        .certificate-img:hover {
            transform: scale(1.03);
        }
        .stats-number {
            font-size: 3rem;
            font-weight: 700;
            color: var(--primary-color);
            line-height: 1;
        }
        .stats-label {
            color: var(--gray-color);
            font-size: 1.1rem;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 120px 0 80px;
            }
            .section-title {
                margin-bottom: 30px;
            }
            .stats-number {
                font-size: 2.5rem;
            }
        }