:root {
            --primary-color: #2a6e3f;
            --secondary-color: #f8b229;
            --light-color: #f8f9fa;
            --dark-color: #343a40;
            --text-color: #333;
            --shadow: 0 5px 15px rgba(0,0,0,0.08);
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            color: var(--text-color);
            line-height: 1.7;
        }
        h1, h2, h3, h4, h5 {
            font-weight: 600;
            color: var(--primary-color);
        }
        .navbar {
            background-color: rgba(255,255,255,0.95);
            box-shadow: var(--shadow);
            transition: all 0.3s ease;
            padding: 15px 0;
        }
        .navbar.scrolled {
            padding: 10px 0;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color);
        }
        .nav-link {
            font-weight: 500;
            color: var(--dark-color) !important;
            margin: 0 8px;
            transition: color 0.3s;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary-color) !important;
        }
        .hero-section {
            background: linear-gradient(rgba(42,110,63,0.85), rgba(42,110,63,0.9)), url('https://images.unsplash.com/photo-1500382017468-9049fed747ef?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 150px 0 120px;
            margin-top: 76px;
        }
        .hero-section h1 {
            color: white;
            font-size: 3.5rem;
            margin-bottom: 25px;
            text-shadow: 2px 2px 5px rgba(0,0,0,0.3);
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 12px 30px;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn-primary:hover {
            background-color: #1e5a2e;
            border-color: #1e5a2e;
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        .btn-secondary {
            background-color: var(--secondary-color);
            border-color: var(--secondary-color);
            color: #333;
            padding: 12px 30px;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn-secondary:hover {
            background-color: #e0a010;
            border-color: #e0a010;
            color: #333;
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        .section-title {
            position: relative;
            margin-bottom: 50px;
            text-align: center;
        }
        .section-title:after {
            content: '';
            position: absolute;
            width: 80px;
            height: 4px;
            background-color: var(--secondary-color);
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
        }
        .feature-card {
            background: white;
            border-radius: 10px;
            padding: 30px;
            box-shadow: var(--shadow);
            height: 100%;
            transition: transform 0.3s;
            border-top: 5px solid var(--primary-color);
        }
        .feature-card:hover {
            transform: translateY(-10px);
        }
        .feature-icon {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 20px;
        }
        .service-card {
            border-radius: 10px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all 0.3s;
            height: 100%;
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .service-card img {
            height: 200px;
            object-fit: cover;
            width: 100%;
        }
        .service-card-body {
            padding: 25px;
        }
        .project-card {
            position: relative;
            overflow: hidden;
            border-radius: 10px;
            box-shadow: var(--shadow);
            height: 300px;
        }
        .project-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }
        .project-card:hover img {
            transform: scale(1.05);
        }
        .project-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: linear-gradient(transparent, rgba(42,110,63,0.9));
            color: white;
            padding: 20px;
            transform: translateY(100%);
            transition: transform 0.3s;
        }
        .project-card:hover .project-overlay {
            transform: translateY(0);
        }
        .team-card {
            text-align: center;
            padding: 25px;
            border-radius: 10px;
            box-shadow: var(--shadow);
            transition: all 0.3s;
            background: white;
        }
        .team-card:hover {
            transform: translateY(-10px);
        }
        .team-img {
            width: 150px;
            height: 150px;
            border-radius: 50%;
            object-fit: cover;
            margin: 0 auto 20px;
            border: 5px solid var(--light-color);
        }
        .news-card {
            border-radius: 10px;
            overflow: hidden;
            box-shadow: var(--shadow);
            height: 100%;
            background: white;
        }
        .news-date {
            background-color: var(--primary-color);
            color: white;
            padding: 10px 15px;
            display: inline-block;
            border-radius: 5px;
            margin-bottom: 15px;
        }
        .contact-info-box {
            background: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: var(--shadow);
            height: 100%;
            text-align: center;
            border-top: 5px solid var(--primary-color);
        }
        .contact-icon {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 20px;
        }
        .form-control {
            padding: 12px 15px;
            border-radius: 8px;
            border: 1px solid #ddd;
            transition: all 0.3s;
        }
        .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 0.25rem rgba(42,110,63,0.25);
        }
        footer {
            background-color: var(--dark-color);
            color: #ddd;
            padding-top: 60px;
        }
        footer a {
            color: #ddd;
            text-decoration: none;
            transition: color 0.3s;
        }
        footer a:hover {
            color: var(--secondary-color);
        }
        .footer-bottom {
            background-color: rgba(0,0,0,0.2);
            padding: 20px 0;
            margin-top: 40px;
        }
        .friendlink a.flink {
            display: inline-block;
            background: white;
            padding: 8px 20px;
            margin: 5px 10px 5px 0;
            border-radius: 30px;
            color: var(--primary-color);
            font-weight: 500;
            transition: all 0.3s;
            border: 1px solid #eee;
        }
        .friendlink a.flink:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-3px);
        }
        .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: 1.2rem;
            z-index: 1000;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: #1e5a2e;
            color: white;
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .hero-section {
                padding: 100px 0 80px;
                margin-top: 66px;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }