:root {
            --primary-color: #1a56db;
            --secondary-color: #0e9f6e;
            --dark-color: #1f2937;
            --light-color: #f9fafb;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        }
        body {
            font-family: "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
            color: #333;
            line-height: 1.6;
        }
        header {
            background: linear-gradient(135deg, var(--dark-color), var(--primary-color));
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.5rem;
        }
        .hero {
            padding: 120px 0;
            background: url('https://images.unsplash.com/photo-1551288049-bebda4e38f71?ixlib=rb-4.0.3&auto=format&fit=crop&w=2070&q=80') center/cover no-repeat;
            color: white;
            text-shadow: 0 2px 4px rgba(0,0,0,0.5);
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 40px;
            text-align: center;
            font-weight: 700;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--secondary-color);
            border-radius: 2px;
        }
        .card {
            transition: transform 0.3s, box-shadow 0.3s;
            border: none;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        .card:hover {
            transform: translateY(-10px);
            box-shadow: 0 12px 20px rgba(0, 0, 0, 0.15);
        }
        .service-icon {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 20px;
        }
        .team-img {
            width: 150px;
            height: 150px;
            object-fit: cover;
            border-radius: 50%;
            border: 5px solid var(--light-color);
            box-shadow: var(--shadow);
        }
        .flink {
            display: inline-block;
            padding: 8px 16px;
            margin: 5px;
            background: var(--light-color);
            border-radius: 5px;
            color: var(--dark-color);
            text-decoration: none;
            transition: all 0.3s;
            border: 1px solid #ddd;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: scale(1.05);
        }
        footer {
            background: var(--dark-color);
            color: white;
        }
        .footer-link {
            color: #ccc;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer-link:hover {
            color: white;
        }
        .contact-info li {
            margin-bottom: 10px;
        }
        .contact-info i {
            width: 30px;
            color: var(--secondary-color);
        }
        .news-item {
            border-left: 4px solid var(--primary-color);
            padding-left: 15px;
            margin-bottom: 25px;
        }
        .btn-primary {
            background-color: var(--primary-color);
            border-color: var(--primary-color);
            padding: 10px 25px;
            border-radius: 30px;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn-primary:hover {
            background-color: #1546b3;
            border-color: #1546b3;
            transform: translateY(-3px);
        }
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            font-size: 1.5rem;
            box-shadow: var(--shadow);
            z-index: 1000;
            opacity: 0;
            transition: opacity 0.3s;
        }
        .back-to-top.show {
            opacity: 1;
        }
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .team-img {
                width: 120px;
                height: 120px;
            }
        }