:root {
            --primary-color: #1a6dbb;
            --secondary-color: #f8f9fa;
            --accent-color: #ffc107;
            --dark-color: #343a40;
            --light-color: #ffffff;
        }
        body {
            font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
            color: #333;
            line-height: 1.8;
        }
        .navbar {
            background-color: var(--light-color);
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            padding: 1rem 0;
            transition: all 0.3s ease;
        }
        .navbar-brand {
            font-weight: bold;
            color: var(--primary-color);
            font-size: 1.8rem;
        }
        .nav-link {
            color: var(--dark-color);
            font-weight: 500;
            margin: 0 0.5rem;
            transition: color 0.3s;
        }
        .nav-link:hover {
            color: var(--primary-color);
        }
        .hero-section {
            background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), url('https://images.unsplash.com/photo-1519710164239-da123dc03ef4?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 8rem 0;
            text-align: center;
        }
        .section-title {
            color: var(--primary-color);
            border-bottom: 3px solid var(--accent-color);
            display: inline-block;
            padding-bottom: 0.5rem;
            margin-bottom: 2rem;
            font-weight: bold;
        }
        .service-card, .project-card, .team-card {
            border: none;
            border-radius: 10px;
            overflow: hidden;
            transition: transform 0.3s, box-shadow 0.3s;
            margin-bottom: 1.5rem;
            height: 100%;
        }
        .service-card:hover, .project-card:hover, .team-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .service-icon {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 1rem;
        }
        .project-img {
            height: 250px;
            object-fit: cover;
            transition: transform 0.5s;
        }
        .project-card:hover .project-img {
            transform: scale(1.05);
        }
        .flink {
            display: inline-block;
            padding: 0.5rem 1rem;
            margin: 0.5rem;
            background: var(--secondary-color);
            border-radius: 5px;
            color: var(--dark-color);
            text-decoration: none;
            transition: background 0.3s, color 0.3s;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
        }
        .footer {
            background-color: var(--dark-color);
            color: white;
            padding: 3rem 0 1rem;
        }
        .footer a {
            color: #ccc;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer a:hover {
            color: var(--accent-color);
        }
        .contact-info i {
            color: var(--accent-color);
            margin-right: 10px;
        }
        .news-item {
            border-left: 4px solid var(--primary-color);
            padding-left: 1rem;
            margin-bottom: 1.5rem;
        }
        .btn-primary-custom {
            background-color: var(--primary-color);
            border: none;
            padding: 0.75rem 2rem;
            border-radius: 50px;
            transition: background 0.3s;
        }
        .btn-primary-custom:hover {
            background-color: #145a9c;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 5rem 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }