:root {
            --primary-green: #2d5a27;
            --secondary-green: #4a7c3a;
            --accent-gold: #c19a53;
            --light-green: #e9f5e7;
            --dark-gray: #333;
            --medium-gray: #666;
            --light-gray: #f8f9fa;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            color: var(--dark-gray);
            line-height: 1.7;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--primary-green);
        }
        .navbar {
            background-color: rgba(255, 255, 255, 0.98) !important;
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
            transition: all 0.3s ease;
            padding: 1rem 0;
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--primary-green) !important;
        }
        .navbar-nav .nav-link {
            color: var(--dark-gray) !important;
            font-weight: 500;
            padding: 0.5rem 1.2rem !important;
            position: relative;
            transition: color 0.3s;
        }
        .navbar-nav .nav-link:hover {
            color: var(--primary-green) !important;
        }
        .navbar-nav .nav-link:hover::after {
            width: 70%;
        }
        .navbar-nav .nav-link::after {
            content: '';
            position: absolute;
            bottom: 5px;
            left: 15%;
            width: 0;
            height: 2px;
            background-color: var(--accent-gold);
            transition: width 0.3s;
        }
        .navbar-toggler {
            border: none;
            padding: 0.5rem;
        }
        .hero-section {
            background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.5)), url('https://images.unsplash.com/photo-1545243421-89e5c9b6d12c?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') no-repeat center center;
            background-size: cover;
            color: white;
            padding: 10rem 0;
            text-align: center;
            position: relative;
        }
        .hero-section h1 {
            color: white;
            font-size: 3.5rem;
            margin-bottom: 1.5rem;
            text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.5);
        }
        .hero-section p {
            font-size: 1.3rem;
            max-width: 700px;
            margin: 0 auto 2rem;
        }
        .btn-primary {
            background-color: var(--primary-green);
            border-color: var(--primary-green);
            padding: 0.8rem 2rem;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn-primary:hover {
            background-color: var(--secondary-green);
            border-color: var(--secondary-green);
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
        }
        .section-title {
            text-align: center;
            margin-bottom: 3rem;
            position: relative;
            padding-bottom: 1rem;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background-color: var(--accent-gold);
        }
        .service-card {
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            transition: all 0.4s;
            height: 100%;
            border: 1px solid rgba(0, 0, 0, 0.05);
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }
        .service-icon {
            background-color: var(--light-green);
            color: var(--primary-green);
            width: 80px;
            height: 80px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 2rem auto 1.5rem;
            font-size: 2rem;
            transition: all 0.3s;
        }
        .service-card:hover .service-icon {
            background-color: var(--primary-green);
            color: white;
        }
        .about-section {
            background-color: var(--light-gray);
            padding: 5rem 0;
        }
        .stats-box {
            text-align: center;
            padding: 2rem;
            background: white;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: all 0.3s;
        }
        .stats-box:hover {
            transform: translateY(-5px);
        }
        .stats-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--primary-green);
            margin-bottom: 0.5rem;
        }
        .portfolio-item {
            position: relative;
            overflow: hidden;
            border-radius: 10px;
            margin-bottom: 1.5rem;
        }
        .portfolio-img {
            width: 100%;
            height: 300px;
            object-fit: cover;
            transition: transform 0.5s;
        }
        .portfolio-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(45, 90, 39, 0.85);
            color: white;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            opacity: 0;
            transition: opacity 0.4s;
            padding: 2rem;
            text-align: center;
        }
        .portfolio-item:hover .portfolio-overlay {
            opacity: 1;
        }
        .portfolio-item:hover .portfolio-img {
            transform: scale(1.05);
        }
        .contact-info-box {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            margin-bottom: 2rem;
            height: 100%;
            border-left: 4px solid var(--accent-gold);
        }
        .contact-icon {
            color: var(--primary-green);
            font-size: 1.8rem;
            margin-bottom: 1rem;
        }
        form .form-control {
            padding: 0.8rem 1rem;
            border: 1px solid #ddd;
            border-radius: 5px;
            margin-bottom: 1.5rem;
            transition: all 0.3s;
        }
        form .form-control:focus {
            border-color: var(--primary-green);
            box-shadow: 0 0 0 0.25rem rgba(45, 90, 39, 0.25);
        }
        .friendlink {
            background-color: var(--light-gray);
            padding: 4rem 0;
        }
        .flink {
            display: inline-block;
            padding: 0.8rem 1.5rem;
            margin: 0.5rem;
            background: white;
            border-radius: 50px;
            color: var(--dark-gray);
            text-decoration: none;
            font-weight: 500;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
            transition: all 0.3s;
            border: 1px solid transparent;
        }
        .flink:hover {
            background-color: var(--primary-green);
            color: white;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(45, 90, 39, 0.2);
            border-color: var(--primary-green);
        }
        footer {
            background-color: #222;
            color: #bbb;
            padding-top: 4rem;
        }
        footer a {
            color: #bbb;
            text-decoration: none;
            transition: color 0.3s;
        }
        footer a:hover {
            color: white;
        }
        .footer-bottom {
            background-color: #111;
            padding: 1.5rem 0;
            margin-top: 3rem;
        }
        .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%;
            margin-right: 0.7rem;
            transition: all 0.3s;
        }
        .social-icons a:hover {
            background-color: var(--primary-green);
            transform: translateY(-3px);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background-color: var(--primary-green);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s;
            z-index: 1000;
        }
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        .back-to-top:hover {
            background-color: var(--secondary-green);
            transform: translateY(-5px);
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .hero-section {
                padding: 6rem 0;
            }
            .section-title {
                font-size: 2rem;
            }
        }