:root {
            --primary: #2a6e3f;
            --secondary: #f8b739;
            --light: #f9f9f9;
            --dark: #1e3a29;
            --gray: #6c757d;
        }
        body {
            font-family: "Microsoft YaHei", "Segoe UI", sans-serif;
            color: #333;
            line-height: 1.6;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.5rem;
            color: var(--primary) !important;
        }
        .nav-link {
            font-weight: 500;
            transition: all 0.3s;
        }
        .nav-link:hover {
            color: var(--secondary) !important;
            transform: translateY(-2px);
        }
        .hero {
            background: linear-gradient(rgba(30, 58, 41, 0.85), rgba(42, 110, 63, 0.9)), url('https://images.unsplash.com/photo-1581578731548-c64695cc6952?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') no-repeat center center/cover;
            color: white;
            padding: 120px 0;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 40px;
            text-align: center;
        }
        .section-title::after {
            content: '';
            position: absolute;
            width: 80px;
            height: 3px;
            background: var(--secondary);
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
        }
        .service-card {
            border: none;
            border-radius: 10px;
            overflow: hidden;
            transition: all 0.4s;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            height: 100%;
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(42, 110, 63, 0.15);
        }
        .service-icon {
            font-size: 2.5rem;
            color: var(--primary);
            margin-bottom: 20px;
        }
        .stats {
            background: linear-gradient(to right, var(--primary), var(--dark));
            color: white;
            padding: 60px 0;
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .portfolio-item {
            position: relative;
            overflow: hidden;
            border-radius: 10px;
            margin-bottom: 30px;
        }
        .portfolio-img {
            transition: transform 0.5s;
            height: 300px;
            object-fit: cover;
            width: 100%;
        }
        .portfolio-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: rgba(42, 110, 63, 0.9);
            color: white;
            padding: 20px;
            transform: translateY(100%);
            transition: transform 0.5s;
        }
        .portfolio-item:hover .portfolio-overlay {
            transform: translateY(0);
        }
        .portfolio-item:hover .portfolio-img {
            transform: scale(1.05);
        }
        .news-card {
            border: 1px solid #eee;
            border-radius: 10px;
            overflow: hidden;
            transition: all 0.3s;
            height: 100%;
        }
        .news-card:hover {
            box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        }
        .news-date {
            background: var(--primary);
            color: white;
            padding: 10px 15px;
            display: inline-block;
            border-radius: 5px;
            font-weight: 600;
        }
        .contact-info {
            background: #f8f9fa;
            padding: 30px;
            border-radius: 10px;
            height: 100%;
        }
        .contact-icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 15px;
        }
        .friendlink {
            background: #f8f9fa;
            padding: 40px 0;
        }
        .flink {
            display: inline-block;
            padding: 8px 20px;
            margin: 5px;
            background: white;
            border-radius: 30px;
            color: var(--dark);
            text-decoration: none;
            transition: all 0.3s;
            border: 1px solid #ddd;
        }
        .flink:hover {
            background: var(--primary);
            color: white;
            transform: translateY(-3px);
            border-color: var(--primary);
        }
        footer {
            background: var(--dark);
            color: rgba(255,255,255,0.8);
        }
        footer a {
            color: rgba(255,255,255,0.8);
            text-decoration: none;
            transition: color 0.3s;
        }
        footer a:hover {
            color: var(--secondary);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            opacity: 0;
            transition: all 0.3s;
            z-index: 1000;
        }
        .back-to-top.show {
            opacity: 1;
        }
        .back-to-top:hover {
            background: var(--secondary);
            transform: translateY(-5px);
        }
        @media (max-width: 768px) {
            .hero {
                padding: 80px 0;
            }
            .stat-number {
                font-size: 2.2rem;
            }
            .portfolio-img {
                height: 200px;
            }
        }