:root {
            --primary-color: #1a6b3c;
            --secondary-color: #2e8b57;
            --accent-color: #4caf50;
            --light-color: #f8f9fa;
            --dark-color: #343a40;
            --text-color: #333;
            --border-radius: 8px;
            --transition: all 0.3s ease;
            --shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 10px 25px rgba(0, 0, 0, 0.12);
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: var(--text-color);
            line-height: 1.6;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 600;
            color: var(--dark-color);
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
        }
        .nav-link {
            font-weight: 500;
            transition: var(--transition);
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary-color) !important;
        }
        .hero-section {
            background: linear-gradient(135deg, rgba(26, 107, 60, 0.85) 0%, rgba(46, 139, 87, 0.9) 100%), url('https://images.unsplash.com/photo-1559757148-5c350d0d3c56?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80') center/cover no-repeat;
            color: white;
            padding: 150px 0;
            position: relative;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 40px;
        }
        .section-title::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 60px;
            height: 3px;
            background: var(--primary-color);
        }
        .text-center .section-title::after {
            left: 50%;
            transform: translateX(-50%);
        }
        .feature-card {
            background: white;
            border-radius: var(--border-radius);
            padding: 30px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            height: 100%;
            border-top: 4px solid transparent;
        }
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--shadow-hover);
            border-top-color: var(--primary-color);
        }
        .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(--shadow);
            transition: var(--transition);
            height: 100%;
        }
        .product-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }
        .product-img {
            height: 220px;
            object-fit: cover;
            width: 100%;
        }
        .product-body {
            padding: 20px;
        }
        .team-member {
            text-align: center;
            margin-bottom: 30px;
        }
        .team-img {
            width: 180px;
            height: 180px;
            border-radius: 50%;
            object-fit: cover;
            margin-bottom: 15px;
            border: 5px solid var(--light-color);
            box-shadow: var(--shadow);
        }
        .news-card {
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            height: 100%;
        }
        .news-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }
        .news-date {
            background: var(--primary-color);
            color: white;
            padding: 8px 15px;
            display: inline-block;
            border-radius: 20px;
            font-size: 0.9rem;
            margin-bottom: 10px;
        }
        .contact-info {
            background: var(--light-color);
            border-radius: var(--border-radius);
            padding: 30px;
            height: 100%;
        }
        .contact-icon {
            font-size: 1.8rem;
            color: var(--primary-color);
            margin-right: 15px;
            width: 50px;
            text-align: center;
        }
        .footer {
            background: var(--dark-color);
            color: #ccc;
            padding: 60px 0 20px;
        }
        .footer a {
            color: #ccc;
            text-decoration: none;
            transition: var(--transition);
        }
        .footer a:hover {
            color: white;
            text-decoration: underline;
        }
        .footer-title {
            color: white;
            font-size: 1.2rem;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-title::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 40px;
            height: 2px;
            background: var(--primary-color);
        }
        .flink {
            display: inline-block;
            background: rgba(255, 255, 255, 0.1);
            padding: 8px 15px;
            margin: 5px;
            border-radius: 4px;
            transition: var(--transition);
        }
        .flink:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-3px);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 1000;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: var(--secondary-color);
            transform: translateY(-5px);
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 100px 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .feature-card, .product-card, .news-card {
                margin-bottom: 25px;
            }
        }