:root {
            --primary-green: #2a8c4a;
            --secondary-green: #5cb85c;
            --light-green: #e9f7ef;
            --dark-green: #1c5c33;
            --accent-gold: #d4af37;
            --text-dark: #333;
            --text-light: #777;
            --white: #ffffff;
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            color: var(--text-dark);
            line-height: 1.8;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5 {
            font-weight: 700;
            color: var(--dark-green);
        }
        .section-padding {
            padding: 80px 0;
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: 50px 0;
            }
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--primary-green) !important;
        }
        .navbar-brand i {
            color: var(--accent-gold);
            margin-right: 10px;
        }
        .nav-link {
            font-weight: 600;
            margin: 0 8px;
            color: var(--text-dark) !important;
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary-green) !important;
        }
        .nav-link:hover:after, .nav-link.active:after {
            content: '';
            position: absolute;
            bottom: 5px;
            left: 10%;
            width: 80%;
            height: 2px;
            background: var(--primary-green);
        }
        .hero {
            background: linear-gradient(rgba(42, 140, 74, 0.85), rgba(28, 92, 51, 0.9)), url('https://images.unsplash.com/photo-1416879595882-3373a0480b5b?ixlib=rb-4.0.3&auto=format&fit=crop&w=1950&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 180px 0 120px;
            text-align: center;
        }
        .hero h1 {
            color: white;
            font-size: 3.5rem;
            margin-bottom: 25px;
            text-shadow: 1px 1px 3px rgba(0,0,0,0.3);
        }
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.5rem;
            }
            .hero {
                padding: 120px 0 80px;
            }
        }
        .btn-primary {
            background-color: var(--primary-green);
            border-color: var(--primary-green);
            padding: 12px 30px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-primary:hover {
            background-color: var(--dark-green);
            border-color: var(--dark-green);
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .btn-outline-light:hover {
            color: var(--primary-green);
        }
        .feature-card {
            border: none;
            border-radius: 15px;
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(42, 140, 74, 0.15);
        }
        .feature-icon {
            width: 80px;
            height: 80px;
            background: var(--light-green);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 25px;
            color: var(--primary-green);
            font-size: 2rem;
        }
        .product-img {
            height: 250px;
            object-fit: cover;
            transition: var(--transition);
        }
        .product-card:hover .product-img {
            transform: scale(1.05);
        }
        .product-card {
            border: none;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: var(--transition);
            height: 100%;
        }
        .product-card:hover {
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }
        .badge-custom {
            background-color: var(--accent-gold);
            color: white;
            font-size: 0.8rem;
        }
        .timeline {
            position: relative;
            max-width: 1200px;
            margin: 0 auto;
        }
        .timeline::after {
            content: '';
            position: absolute;
            width: 6px;
            background-color: var(--light-green);
            top: 0;
            bottom: 0;
            left: 50%;
            margin-left: -3px;
            border-radius: 3px;
        }
        @media (max-width: 768px) {
            .timeline::after {
                left: 31px;
            }
        }
        .timeline-item {
            padding: 10px 40px;
            position: relative;
            width: 50%;
            box-sizing: border-box;
        }
        .timeline-item::after {
            content: '';
            position: absolute;
            width: 25px;
            height: 25px;
            background-color: var(--white);
            border: 4px solid var(--primary-green);
            border-radius: 50%;
            top: 15px;
            z-index: 1;
        }
        .left {
            left: 0;
        }
        .right {
            left: 50%;
        }
        .left::after {
            right: -17px;
        }
        .right::after {
            left: -17px;
        }
        @media (max-width: 768px) {
            .timeline-item {
                width: 100%;
                padding-left: 70px;
                padding-right: 25px;
            }
            .left, .right {
                left: 0;
            }
            .left::after, .right::after {
                left: 22px;
            }
            .right {
                left: 0%;
            }
        }
        friendlink {
            display: block;
            margin-bottom: 30px;
        }
        .flink {
            display: inline-flex;
            align-items: center;
            background: var(--light-green);
            color: var(--dark-green);
            padding: 12px 20px;
            border-radius: 8px;
            margin: 0 10px 10px 0;
            text-decoration: none;
            transition: var(--transition);
            font-weight: 500;
        }
        .flink:hover {
            background: var(--primary-green);
            color: white;
            transform: translateY(-3px);
        }
        .flink i {
            margin-right: 8px;
        }
        footer {
            background-color: #1a472a;
            color: #ddd;
        }
        footer h5 {
            color: white;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 10px;
        }
        footer h5:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 2px;
            background: var(--accent-gold);
        }
        footer a {
            color: #bbb;
            text-decoration: none;
            transition: var(--transition);
        }
        footer a:hover {
            color: white;
            padding-left: 5px;
        }
        .social-links a {
            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: var(--transition);
        }
        .social-links a:hover {
            background: var(--primary-green);
            transform: translateY(-3px);
        }
        .copyright {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            font-size: 0.9rem;
            color: #aaa;
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--primary-green);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 1000;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background: var(--dark-green);
            transform: translateY(-5px);
        }
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }