:root {
            --primary-color: #1e6f5c;
            --secondary-color: #289672;
            --accent-color: #e6b325;
            --light-color: #f8f9fa;
            --dark-color: #2c3e50;
            --gray-color: #6c757d;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: #333;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5 {
            font-weight: 700;
            color: var(--dark-color);
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 50px;
        }
        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--accent-color);
        }
        .text-primary-custom {
            color: var(--primary-color) !important;
        }
        .bg-primary-custom {
            background-color: var(--primary-color) !important;
        }
        .btn-primary-custom {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            color: white;
            padding: 10px 30px;
            border-radius: 30px;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .btn-primary-custom:hover {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .navbar {
            padding-top: 15px;
            padding-bottom: 15px;
            transition: all 0.4s ease;
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
        }
        .navbar-brand {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-color) !important;
        }
        .navbar-nav .nav-link {
            font-weight: 600;
            margin: 0 8px;
            color: var(--dark-color) !important;
            transition: color 0.3s;
        }
        .navbar-nav .nav-link:hover, .navbar-nav .nav-link.active {
            color: var(--primary-color) !important;
        }
        .hero-section {
            padding-top: 150px;
            padding-bottom: 100px;
            background: linear-gradient(rgba(30, 111, 92, 0.85), rgba(40, 150, 114, 0.9)), url('https://images.unsplash.com/photo-1466611653911-95081537e5b7?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') no-repeat center center;
            background-size: cover;
            color: white;
        }
        .hero-section h1 {
            color: white;
            font-size: 3.5rem;
            margin-bottom: 25px;
        }
        .stats-box {
            background: white;
            border-radius: 10px;
            padding: 30px 20px;
            text-align: center;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
            transition: transform 0.3s;
            margin-bottom: 30px;
        }
        .stats-box:hover {
            transform: translateY(-10px);
        }
        .stats-box i {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 15px;
        }
        .stats-box h3 {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 5px;
        }
        .product-card {
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: all 0.3s;
            height: 100%;
            border: 1px solid #eee;
        }
        .product-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .product-card img {
            width: 100%;
            height: 220px;
            object-fit: cover;
        }
        .product-card-body {
            padding: 25px;
        }
        .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;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .timeline-item:nth-child(odd)::before {
            content: " ";
            height: 0;
            position: absolute;
            top: 22px;
            width: 0;
            z-index: 1;
            right: 30px;
            border: medium solid white;
            border-width: 10px 0 10px 10px;
            border-color: transparent transparent transparent white;
        }
        .timeline-item:nth-child(even)::before {
            content: " ";
            height: 0;
            position: absolute;
            top: 22px;
            width: 0;
            z-index: 1;
            left: 30px;
            border: medium solid white;
            border-width: 10px 10px 10px 0;
            border-color: transparent white transparent transparent;
        }
        .flink {
            display: inline-block;
            background: #f8f9fa;
            padding: 10px 20px;
            margin: 8px;
            border-radius: 5px;
            color: var(--dark-color);
            text-decoration: none;
            transition: all 0.3s;
            border: 1px solid #dee2e6;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-3px);
            border-color: var(--primary-color);
        }
        footer {
            background-color: var(--dark-color);
            color: #bbb;
        }
        footer a {
            color: #ddd;
            text-decoration: none;
            transition: color 0.3s;
        }
        footer a:hover {
            color: white;
        }
        .social-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: rgba(255,255,255,0.1);
            border-radius: 50%;
            margin-right: 10px;
            transition: all 0.3s;
        }
        .social-icon:hover {
            background: var(--primary-color);
            transform: translateY(-3px);
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .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)::before, .timeline-item:nth-child(even)::before {
                left: 60px;
                border: medium solid white;
                border-width: 10px 10px 10px 0;
                border-color: transparent white transparent transparent;
            }
        }