:root {
            --primary-color: #0a58ca;
            --secondary-color: #6c757d;
            --accent-color: #20c997;
            --light-bg: #f8f9fa;
            --dark-bg: #212529;
            --shadow: 0 .5rem 1rem rgba(0,0,0,.15);
        }
        body {
            font-family: "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
            color: #333;
            line-height: 1.8;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--dark-bg);
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
        }
        .nav-link {
            font-weight: 500;
            transition: color 0.3s;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--primary-color) !important;
        }
        .hero-section {
            background: linear-gradient(135deg, rgba(10, 88, 202, 0.9) 0%, rgba(32, 201, 151, 0.8) 100%), url('https://images.unsplash.com/photo-1552664730-d307ca884978?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') no-repeat center center/cover;
            color: white;
            padding: 8rem 0;
            position: relative;
        }
        .section-padding {
            padding: 5rem 0;
        }
        .service-card, .case-card, .news-card {
            border: none;
            border-radius: 15px;
            overflow: hidden;
            transition: transform 0.4s ease, box-shadow 0.4s ease;
            height: 100%;
            background: #fff;
        }
        .service-card:hover, .case-card:hover, .news-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--shadow);
        }
        .service-icon {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
        }
        .case-card img, .news-card img {
            height: 220px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .case-card:hover img, .news-card:hover img {
            transform: scale(1.05);
        }
        .bg-light-alt {
            background-color: #f0f8ff;
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 0.75rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn-primary:hover {
            background-color: #084298;
            border-color: #084298;
            transform: scale(1.05);
        }
        .flink {
            display: inline-block;
            padding: 0.75rem 1.5rem;
            margin: 0.5rem;
            background: var(--light-bg);
            border-radius: 8px;
            color: var(--dark-bg);
            text-decoration: none;
            transition: all 0.3s;
            border: 1px solid #dee2e6;
            font-weight: 500;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
            transform: translateY(-3px);
        }
        footer {
            background-color: var(--dark-bg);
            color: #adb5bd;
        }
        footer a {
            color: #adb5bd;
            text-decoration: none;
            transition: color 0.3s;
        }
        footer a:hover {
            color: white;
        }
        .contact-info li {
            margin-bottom: 1rem;
        }
        .contact-info i {
            width: 30px;
            color: var(--accent-color);
        }
        .sticky-top {
            backdrop-filter: blur(10px);
            background-color: rgba(255, 255, 255, 0.95);
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 5rem 0;
                text-align: center;
            }
            .section-padding {
                padding: 3rem 0;
            }
            .display-4 {
                font-size: 2.5rem;
            }
        }