:root {
            --primary-color: #1a6b3c;
            --secondary-color: #0d4d2a;
            --accent-color: #34a853;
            --light-bg: #f8fdf9;
            --text-dark: #333;
            --text-light: #666;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: var(--text-dark);
            line-height: 1.8;
            overflow-x: hidden;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .navbar-brand i {
            color: var(--accent-color);
            margin-right: 10px;
        }
        .hero-section {
            background: linear-gradient(rgba(26, 107, 60, 0.85), rgba(13, 77, 42, 0.9)), url('https://images.unsplash.com/photo-1564936281291-2945512dae1b?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 150px 0;
            position: relative;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 50px;
            color: var(--secondary-color);
            font-weight: 700;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 80px;
            height: 4px;
            background: var(--accent-color);
        }
        .service-card {
            border: none;
            border-radius: 15px;
            overflow: hidden;
            transition: transform 0.4s ease, box-shadow 0.4s ease;
            height: 100%;
            background: var(--light-bg);
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        .service-icon {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 20px;
        }
        .stats-box {
            background: var(--primary-color);
            color: white;
            padding: 30px;
            border-radius: 10px;
            text-align: center;
            transition: background 0.3s;
        }
        .stats-box:hover {
            background: var(--secondary-color);
        }
        .project-img {
            height: 250px;
            object-fit: cover;
            transition: transform 0.5s;
        }
        .project-card:hover .project-img {
            transform: scale(1.05);
        }
        .flink {
            display: inline-block;
            padding: 8px 20px;
            margin: 5px;
            background: #f0f9f0;
            border-radius: 25px;
            color: var(--primary-color);
            text-decoration: none;
            transition: all 0.3s;
            border: 1px solid #cce8cc;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }
        .contact-info i {
            width: 40px;
            height: 40px;
            background: var(--light-bg);
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-right: 15px;
            color: var(--primary-color);
        }
        footer {
            background: #222;
            color: #ddd;
        }
        .footer-links a {
            color: #aaa;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer-links a:hover {
            color: white;
        }
        .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;
            z-index: 1000;
            text-decoration: none;
            opacity: 0.8;
            transition: opacity 0.3s;
        }
        .back-to-top:hover {
            opacity: 1;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 100px 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }