:root {
            --primary-color: #2c6e49;
            --secondary-color: #4c956c;
            --accent-color: #fefee3;
            --light-color: #f8f9fa;
            --dark-color: #1d3557;
            --text-color: #333;
            --border-radius: 8px;
            --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            --transition: all 0.3s ease;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: var(--text-color);
            line-height: 1.6;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5 {
            color: var(--dark-color);
            font-weight: 700;
            margin-bottom: 1rem;
        }
        .section-header {
            text-align: center;
            margin-bottom: 3rem;
            position: relative;
            padding-bottom: 1rem;
        }
        .section-header h2 {
            font-size: 2.5rem;
            display: inline-block;
        }
        .section-header h2:after {
            content: '';
            position: absolute;
            width: 80px;
            height: 4px;
            background: var(--secondary-color);
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            border-radius: 2px;
        }
        .section-header p {
            color: #666;
            max-width: 700px;
            margin: 1rem auto 0;
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            padding: 1rem 0;
            transition: var(--transition);
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .navbar-brand span {
            color: var(--secondary-color);
        }
        .nav-link {
            font-weight: 500;
            color: var(--dark-color) !important;
            margin: 0 0.5rem;
            padding: 0.5rem 1rem !important;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        .nav-link:hover, .nav-link.active {
            background-color: var(--primary-color);
            color: white !important;
        }
        .hero-section {
            background: linear-gradient(135deg, rgba(44, 110, 73, 0.9), rgba(76, 149, 108, 0.9)), url('https://images.unsplash.com/photo-1523050854058-8df90110c9f1?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 8rem 0 6rem;
            position: relative;
        }
        .hero-section h1 {
            color: white;
            font-size: 3.2rem;
            margin-bottom: 1.5rem;
            text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.3);
        }
        .hero-section p {
            font-size: 1.2rem;
            margin-bottom: 2rem;
            max-width: 700px;
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 0.75rem 2rem;
            font-weight: 600;
            border-radius: var(--border-radius);
            transition: var(--transition);
        }
        .btn-primary:hover {
            background-color: #23583a;
            border-color: #23583a;
            transform: translateY(-3px);
            box-shadow: var(--box-shadow);
        }
        .btn-outline-light:hover {
            color: var(--primary-color);
        }
        .card {
            border: none;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            transition: var(--transition);
            height: 100%;
            overflow: hidden;
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        .card-icon {
            width: 70px;
            height: 70px;
            background-color: rgba(44, 110, 73, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.5rem;
            font-size: 1.8rem;
            color: var(--primary-color);
        }
        .about-section {
            padding: 6rem 0;
            background-color: #f9f9f9;
        }
        .about-img {
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            overflow: hidden;
        }
        .about-img img {
            transition: var(--transition);
            width: 100%;
            height: auto;
        }
        .about-img:hover img {
            transform: scale(1.05);
        }
        .services-section {
            padding: 6rem 0;
        }
        .portfolio-section {
            padding: 6rem 0;
            background-color: #f9f9f9;
        }
        .portfolio-item {
            position: relative;
            border-radius: var(--border-radius);
            overflow: hidden;
            margin-bottom: 1.5rem;
            height: 300px;
        }
        .portfolio-item img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .portfolio-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(44, 110, 73, 0.85);
            color: white;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            opacity: 0;
            transition: var(--transition);
            padding: 2rem;
            text-align: center;
        }
        .portfolio-item:hover .portfolio-overlay {
            opacity: 1;
        }
        .portfolio-item:hover img {
            transform: scale(1.1);
        }
        .news-section {
            padding: 6rem 0;
        }
        .news-item {
            border-bottom: 1px solid #eee;
            padding-bottom: 1.5rem;
            margin-bottom: 1.5rem;
            transition: var(--transition);
        }
        .news-item:hover {
            background-color: #f8f9fa;
            padding-left: 1rem;
            border-radius: var(--border-radius);
        }
        .news-date {
            background-color: var(--primary-color);
            color: white;
            width: 70px;
            height: 70px;
            border-radius: var(--border-radius);
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            font-weight: 700;
            margin-right: 1.5rem;
        }
        .news-date .day {
            font-size: 1.8rem;
            line-height: 1;
        }
        .contact-section {
            padding: 6rem 0;
            background-color: #f9f9f9;
        }
        .contact-info-item {
            display: flex;
            align-items: flex-start;
            margin-bottom: 2rem;
        }
        .contact-icon {
            width: 50px;
            height: 50px;
            background-color: rgba(44, 110, 73, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--primary-color);
            margin-right: 1rem;
            flex-shrink: 0;
        }
        .form-control {
            padding: 0.75rem 1rem;
            border-radius: var(--border-radius);
            border: 1px solid #ddd;
            transition: var(--transition);
        }
        .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 0.25rem rgba(44, 110, 73, 0.25);
        }
        .friendlink {
            padding: 4rem 0;
            background-color: var(--light-color);
        }
        .flink {
            display: inline-block;
            padding: 0.5rem 1.5rem;
            margin: 0.5rem;
            background-color: white;
            border-radius: var(--border-radius);
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
            color: var(--dark-color);
            transition: var(--transition);
            text-decoration: none;
            font-weight: 500;
        }
        .flink:hover {
            background-color: var(--primary-color);
            color: white;
            transform: translateY(-3px);
            text-decoration: none;
        }
        .footer {
            background-color: var(--dark-color);
            color: rgba(255, 255, 255, 0.8);
            padding: 4rem 0 2rem;
        }
        .footer h5 {
            color: white;
            margin-bottom: 1.5rem;
            font-size: 1.2rem;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
            display: block;
            margin-bottom: 0.5rem;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: white;
            padding-left: 0.5rem;
        }
        .copyright {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 2rem;
            margin-top: 3rem;
            text-align: center;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
        }
        .social-icons a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background-color: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            color: white;
            margin-right: 0.5rem;
            transition: var(--transition);
        }
        .social-icons a:hover {
            background-color: var(--primary-color);
            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: var(--transition);
            text-decoration: none;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: var(--secondary-color);
            color: white;
        }
        @media (max-width: 992px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .section-header h2 {
                font-size: 2.2rem;
            }
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 6rem 0 4rem;
            }
            .hero-section h1 {
                font-size: 2rem;
            }
            .section-header h2 {
                font-size: 1.8rem;
            }
            .about-section, .services-section, .portfolio-section, .news-section, .contact-section {
                padding: 4rem 0;
            }
        }
        .fade-in {
            animation: fadeIn 1s ease-in-out;
        }
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(20px); }
            to { opacity: 1; transform: translateY(0); }
        }