:root {
            --primary-blue: #0056a6;
            --secondary-blue: #007bff;
            --accent-gold: #d4af37;
            --light-bg: #f8f9fa;
            --dark-text: #212529;
            --gray-border: #dee2e6;
        }
        body {
            font-family: "Microsoft YaHei", "SimHei", "Segoe UI", sans-serif;
            color: var(--dark-text);
            line-height: 1.7;
        }
        h1, h2, h3, h4, .navbar-brand {
            font-weight: 600;
        }
        .section-padding {
            padding-top: 5rem;
            padding-bottom: 5rem;
        }
        .hero-section {
            background: linear-gradient(rgba(0, 40, 100, 0.85), rgba(0, 60, 120, 0.9)), url('https://images.unsplash.com/photo-1621905252507-b35492cc74b4?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding-top: 10rem;
            padding-bottom: 6rem;
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.98) !important;
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
            padding-top: 0.8rem;
            padding-bottom: 0.8rem;
            transition: all 0.3s ease;
        }
        .navbar-brand {
            color: var(--primary-blue) !important;
            font-size: 1.8rem;
        }
        .nav-link {
            color: #333 !important;
            font-weight: 500;
            margin: 0 0.3rem;
            padding: 0.5rem 1rem !important;
            border-radius: 4px;
            transition: all 0.3s;
        }
        .nav-link:hover, .nav-link.active {
            color: white !important;
            background-color: var(--primary-blue);
        }
        .btn-primary {
            background-color: var(--primary-blue);
            border-color: var(--primary-blue);
            padding: 0.6rem 2rem;
            border-radius: 4px;
            font-weight: 500;
        }
        .btn-primary:hover {
            background-color: #004085;
            border-color: #004085;
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(0, 86, 166, 0.3);
        }
        .icon-box {
            text-align: center;
            padding: 2rem 1.5rem;
            border-radius: 10px;
            background-color: white;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
            height: 100%;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border-top: 4px solid var(--primary-blue);
        }
        .icon-box:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        .icon-box i {
            font-size: 2.5rem;
            color: var(--primary-blue);
            margin-bottom: 1.5rem;
        }
        .product-card {
            border: none;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            height: 100%;
        }
        .product-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        .product-card img {
            height: 220px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .product-card:hover img {
            transform: scale(1.05);
        }
        .product-card .card-body {
            padding: 1.5rem;
        }
        .news-card {
            border-left: 4px solid var(--primary-blue);
            padding-left: 1.5rem;
            margin-bottom: 2rem;
            transition: all 0.3s ease;
        }
        .news-card:hover {
            border-left-color: var(--accent-gold);
            padding-left: 2rem;
        }
        .timeline {
            position: relative;
            padding-left: 2rem;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 7px;
            top: 0;
            height: 100%;
            width: 2px;
            background-color: var(--primary-blue);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 2.5rem;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -2.4rem;
            top: 5px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background-color: var(--primary-blue);
            border: 3px solid white;
            box-shadow: 0 0 0 3px var(--primary-blue);
        }
        .contact-info-box {
            background-color: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
            text-align: center;
            height: 100%;
            border-top: 4px solid var(--primary-blue);
        }
        .contact-info-box i {
            font-size: 2.5rem;
            color: var(--primary-blue);
            margin-bottom: 1.5rem;
        }
        footer {
            background-color: #1a2a3a;
            color: rgba(255, 255, 255, 0.85);
        }
        footer a {
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
            transition: color 0.3s;
        }
        footer a:hover {
            color: white;
        }
        .friendlink {
            background-color: rgba(255, 255, 255, 0.05);
            border-radius: 8px;
            padding: 2rem;
        }
        .flink {
            display: inline-block;
            background-color: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.8);
            padding: 0.5rem 1.5rem;
            margin: 0.5rem;
            border-radius: 4px;
            text-decoration: none;
            transition: all 0.3s;
        }
        .flink:hover {
            background-color: var(--primary-blue);
            color: white;
            transform: translateY(-3px);
        }
        .map-container {
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 700;
            color: var(--primary-blue);
        }
        .stat-label {
            font-size: 1rem;
            color: #666;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        @media (max-width: 768px) {
            .section-padding {
                padding-top: 3rem;
                padding-bottom: 3rem;
            }
            .hero-section {
                padding-top: 7rem;
                padding-bottom: 4rem;
                text-align: center;
            }
            .navbar-nav {
                text-align: center;
                padding-top: 1rem;
            }
            .icon-box, .contact-info-box {
                margin-bottom: 1.5rem;
            }
        }