:root {
            --primary-color: #1a5f7a;
            --secondary-color: #57cc99;
            --accent-color: #ff9a3c;
            --dark-color: #2d3047;
            --light-color: #f8f9fa;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            color: #333;
            line-height: 1.8;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--dark-color);
        }
        .navbar {
            background-color: rgba(26, 95, 122, 0.95);
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            transition: all 0.3s ease;
            padding: 1rem 0;
        }
        .navbar-brand {
            font-size: 1.8rem;
            font-weight: 700;
            color: white !important;
        }
        .navbar-nav .nav-link {
            color: rgba(255,255,255,0.9) !important;
            font-weight: 500;
            margin: 0 0.5rem;
            padding: 0.5rem 1rem;
            border-radius: 4px;
            transition: all 0.3s;
        }
        .navbar-nav .nav-link:hover, .navbar-nav .nav-link.active {
            background-color: var(--secondary-color);
            color: white !important;
            transform: translateY(-2px);
        }
        .hero-section {
            background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('https://images.unsplash.com/photo-1504307651254-35680f356dfd?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 10rem 0;
            text-align: center;
            position: relative;
        }
        .hero-section h1 {
            font-size: 3.5rem;
            color: white;
            margin-bottom: 1.5rem;
            text-shadow: 2px 2px 8px rgba(0,0,0,0.5);
        }
        .section-title {
            position: relative;
            padding-bottom: 1rem;
            margin-bottom: 3rem;
            text-align: center;
        }
        .section-title::after {
            content: '';
            position: absolute;
            width: 80px;
            height: 4px;
            background: var(--secondary-color);
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            border-radius: 2px;
        }
        .service-card, .project-card, .news-card {
            border: none;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 8px 24px rgba(0,0,0,0.1);
            transition: all 0.4s ease;
            height: 100%;
            background: white;
        }
        .service-card:hover, .project-card:hover, .news-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 35px rgba(0,0,0,0.15);
        }
        .service-icon {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
            display: inline-block;
        }
        .project-card img {
            height: 250px;
            object-fit: cover;
            transition: transform 0.5s;
        }
        .project-card:hover img {
            transform: scale(1.05);
        }
        .flink {
            display: inline-block;
            padding: 0.75rem 1.5rem;
            background: var(--light-color);
            border-radius: 50px;
            color: var(--dark-color);
            text-decoration: none;
            margin: 0.5rem;
            border: 2px solid transparent;
            transition: all 0.3s;
            font-weight: 500;
        }
        .flink:hover {
            background: var(--secondary-color);
            color: white;
            border-color: var(--secondary-color);
            transform: scale(1.05);
        }
        .contact-info li {
            margin-bottom: 1rem;
            font-size: 1.1rem;
        }
        .contact-info i {
            color: var(--primary-color);
            width: 30px;
        }
        footer {
            background-color: var(--dark-color);
            color: #ddd;
            padding: 4rem 0 2rem;
        }
        footer a {
            color: #ddd;
            text-decoration: none;
            transition: color 0.3s;
        }
        footer a:hover {
            color: var(--secondary-color);
        }
        .social-icons a {
            display: inline-block;
            width: 40px;
            height: 40px;
            background: rgba(255,255,255,0.1);
            border-radius: 50%;
            text-align: center;
            line-height: 40px;
            margin: 0 0.5rem;
            transition: all 0.3s;
        }
        .social-icons a:hover {
            background: var(--secondary-color);
            transform: translateY(-5px);
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .navbar-nav .nav-link {
                margin: 0.2rem 0;
                text-align: center;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }