:root {
            --primary-color: #1a5f7a;
            --secondary-color: #f8f9fa;
            --accent-color: #ff7e30;
            --text-dark: #333;
            --text-light: #666;
        }
        body {
            font-family: "Microsoft YaHei", "Segoe UI", sans-serif;
            color: var(--text-dark);
            line-height: 1.6;
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        .navbar-brand {
            font-weight: 700;
            color: var(--primary-color);
            font-size: 1.5rem;
        }
        .nav-link {
            color: var(--text-dark) !important;
            font-weight: 500;
            margin: 0 5px;
            transition: color 0.3s;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--accent-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-1490818387583-1baba5e638af?ixlib=rb-4.0.3&auto=format&fit=crop&w=1600&q=80') no-repeat center center/cover;
            color: white;
            padding: 120px 0;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 40px;
            text-align: center;
            color: var(--primary-color);
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background: var(--accent-color);
        }
        .card {
            border: none;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: transform 0.3s;
            height: 100%;
        }
        .card:hover {
            transform: translateY(-10px);
        }
        .card-img-top {
            height: 200px;
            object-fit: cover;
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 10px 25px;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn-primary:hover {
            background-color: var(--accent-color);
            border-color: var(--accent-color);
            transform: scale(1.05);
        }
        .footer {
            background-color: #2c3e50;
            color: white;
            padding: 60px 0 20px;
        }
        .footer a {
            color: #ddd;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer a:hover {
            color: var(--accent-color);
        }
        .friendlink {
            background-color: var(--secondary-color);
            padding: 30px 0;
            border-top: 1px solid #dee2e6;
        }
        .flink {
            display: inline-block;
            margin: 5px 10px;
            padding: 8px 15px;
            background: white;
            border-radius: 5px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.05);
            color: var(--primary-color);
            text-decoration: none;
            transition: all 0.3s;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }
        .product-img {
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .contact-info i {
            width: 30px;
            color: var(--accent-color);
        }
        .news-item {
            border-bottom: 1px solid #eee;
            padding: 20px 0;
            transition: background 0.3s;
        }
        .news-item:hover {
            background-color: #f9f9f9;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 80px 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }