:root {
            --primary-color: #1e7e34;
            --secondary-color: #f8f9fa;
            --accent-color: #ffc107;
            --text-dark: #333;
            --text-light: #666;
        }
        body {
            font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
            color: var(--text-dark);
            overflow-x: hidden;
        }
        .navbar-brand {
            font-weight: 700;
            color: var(--primary-color) !important;
        }
        .hero-section {
            background: linear-gradient(rgba(30, 126, 52, 0.85), rgba(30, 126, 52, 0.9)), url('https://images.unsplash.com/photo-1600880292203-757bb62b4baf?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 8rem 0;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 3rem;
            color: var(--primary-color);
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 3px;
            background-color: var(--accent-color);
        }
        .card-hover {
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border: none;
            border-radius: 12px;
            overflow: hidden;
            height: 100%;
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1) !important;
        }
        .service-icon {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
        }
        .contact-info-box {
            background-color: var(--secondary-color);
            border-radius: 12px;
            padding: 2.5rem;
            height: 100%;
            transition: background-color 0.3s ease;
        }
        .contact-info-box:hover {
            background-color: #e9ecef;
        }
        .flink {
            display: inline-block;
            padding: 8px 20px;
            margin: 5px 10px;
            background-color: var(--secondary-color);
            border-radius: 6px;
            color: var(--text-dark);
            text-decoration: none;
            transition: all 0.3s ease;
            border: 1px solid #dee2e6;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            transform: scale(1.05);
            border-color: var(--primary-color);
        }
        .product-img {
            height: 220px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .product-card:hover .product-img {
            transform: scale(1.05);
        }
        footer {
            background-color: #2c3e50;
            color: #ecf0f1;
        }
        .footer-link {
            color: #bdc3c7;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        .footer-link:hover {
            color: white;
        }
        .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: 1.5rem;
            cursor: pointer;
            z-index: 1000;
            opacity: 0;
            transition: opacity 0.3s ease;
            border: none;
        }
        .back-to-top.show {
            opacity: 1;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 5rem 0;
            }
            .display-4 {
                font-size: 2.2rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }