:root {
            --primary-color: #2a6e3f;
            --secondary-color: #8cc63f;
            --accent-color: #d4a017;
            --light-color: #f5f9f2;
            --dark-color: #1a472a;
            --text-color: #333;
            --text-light: #666;
            --border-color: #e0e8dc;
        }
        body {
            font-family: "Microsoft YaHei", "Segoe UI", "PingFang SC", sans-serif;
            color: var(--text-color);
            line-height: 1.8;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5 {
            font-weight: 700;
            color: var(--dark-color);
        }
        .hero-section {
            background: linear-gradient(rgba(26, 71, 42, 0.85), rgba(42, 110, 63, 0.9)), url('https://images.unsplash.com/photo-1576086213369-97a306d36557?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') no-repeat center center;
            background-size: cover;
            color: white;
            padding: 180px 0 120px;
            position: relative;
        }
        .hero-section h1 {
            font-size: 3.5rem;
            color: white;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
        }
        .section-padding {
            padding: 100px 0;
        }
        .section-title {
            position: relative;
            margin-bottom: 70px;
            text-align: center;
        }
        .section-title:after {
            content: '';
            position: absolute;
            width: 80px;
            height: 4px;
            background: var(--accent-color);
            bottom: -20px;
            left: 50%;
            transform: translateX(-50%);
        }
        .feature-card {
            background: white;
            border-radius: 10px;
            padding: 30px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
            height: 100%;
            border-top: 4px solid var(--primary-color);
        }
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 40px rgba(42, 110, 63, 0.1);
        }
        .feature-icon {
            width: 70px;
            height: 70px;
            background: var(--light-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 25px;
            color: var(--primary-color);
            font-size: 28px;
        }
        .product-card {
            border: 1px solid var(--border-color);
            border-radius: 10px;
            overflow: hidden;
            transition: all 0.3s ease;
            height: 100%;
        }
        .product-card:hover {
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
            transform: translateY(-5px);
        }
        .product-img {
            height: 250px;
            overflow: hidden;
        }
        .product-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .product-card:hover .product-img img {
            transform: scale(1.05);
        }
        .btn-primary-custom {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            color: white;
            padding: 12px 30px;
            border-radius: 50px;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .btn-primary-custom:hover {
            background-color: var(--dark-color);
            border-color: var(--dark-color);
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(42, 110, 63, 0.2);
        }
        .nav-link {
            font-weight: 600;
            color: var(--dark-color) !important;
            padding: 10px 20px !important;
            transition: color 0.3s ease;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary-color) !important;
        }
        .navbar-brand {
            font-size: 28px;
            font-weight: 800;
            color: var(--primary-color) !important;
        }
        .footer {
            background-color: var(--dark-color);
            color: white;
            padding: 80px 0 30px;
        }
        .footer h5 {
            color: white;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 15px;
        }
        .footer h5:after {
            content: '';
            position: absolute;
            width: 50px;
            height: 2px;
            background: var(--accent-color);
            bottom: 0;
            left: 0;
        }
        .footer-links a {
            color: #ccc;
            text-decoration: none;
            display: block;
            margin-bottom: 12px;
            transition: color 0.3s ease;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        .copyright {
            background-color: rgba(0, 0, 0, 0.2);
            padding: 20px 0;
            margin-top: 50px;
            text-align: center;
        }
        .timeline {
            position: relative;
            max-width: 1200px;
            margin: 0 auto;
        }
        .timeline::after {
            content: '';
            position: absolute;
            width: 6px;
            background-color: var(--primary-color);
            top: 0;
            bottom: 0;
            left: 50%;
            margin-left: -3px;
        }
        .timeline-item {
            padding: 10px 40px;
            position: relative;
            width: 50%;
            box-sizing: border-box;
        }
        .timeline-item:nth-child(odd) {
            left: 0;
        }
        .timeline-item:nth-child(even) {
            left: 50%;
        }
        .timeline-content {
            padding: 20px 30px;
            background-color: white;
            position: relative;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }
        .timeline-item:nth-child(odd)::after {
            content: '';
            position: absolute;
            width: 20px;
            height: 20px;
            right: -13px;
            background-color: white;
            border: 4px solid var(--primary-color);
            top: 15px;
            border-radius: 50%;
            z-index: 1;
        }
        .timeline-item:nth-child(even)::after {
            content: '';
            position: absolute;
            width: 20px;
            height: 20px;
            left: -13px;
            background-color: white;
            border: 4px solid var(--primary-color);
            top: 15px;
            border-radius: 50%;
            z-index: 1;
        }
        .contact-info {
            background-color: var(--light-color);
            padding: 40px 30px;
            border-radius: 10px;
            height: 100%;
        }
        .contact-icon {
            width: 60px;
            height: 60px;
            background-color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-color);
            font-size: 22px;
            margin-right: 20px;
            flex-shrink: 0;
        }
        .flink {
            display: inline-block;
            background-color: white;
            color: var(--primary-color);
            padding: 10px 25px;
            margin: 10px 15px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            border: 2px solid var(--border-color);
            transition: all 0.3s ease;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
            transform: translateY(-3px);
        }
        .friendlink {
            background-color: var(--light-color);
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--primary-color);
            margin-bottom: 10px;
        }
        .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: 20px;
            text-decoration: none;
            opacity: 0;
            transition: all 0.3s ease;
            z-index: 1000;
        }
        .back-to-top.active {
            opacity: 1;
        }
        .back-to-top:hover {
            background-color: var(--dark-color);
            color: white;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 120px 0 80px;
            }
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .section-padding {
                padding: 60px 0;
            }
            .timeline::after {
                left: 31px;
            }
            .timeline-item {
                width: 100%;
                padding-left: 70px;
                padding-right: 25px;
            }
            .timeline-item:nth-child(even) {
                left: 0;
            }
            .timeline-item:nth-child(odd)::after,
            .timeline-item:nth-child(even)::after {
                left: 21px;
                right: auto;
            }
        }
        .carousel-caption-custom {
            background: rgba(26, 71, 42, 0.8);
            padding: 30px;
            border-radius: 10px;
            bottom: 40px;
            left: 10%;
            right: 10%;
        }
        .news-card {
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            height: 100%;
            transition: all 0.3s ease;
        }
        .news-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        .news-date {
            position: absolute;
            top: 20px;
            left: 20px;
            background-color: var(--primary-color);
            color: white;
            padding: 10px 15px;
            border-radius: 5px;
            text-align: center;
            font-weight: 700;
        }
        .certificate-img {
            border: 1px solid var(--border-color);
            border-radius: 10px;
            overflow: hidden;
            transition: all 0.3s ease;
        }
        .certificate-img:hover {
            transform: scale(1.03);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }