:root {
            --primary-color: #1a56db;
            --secondary-color: #7e3af2;
            --accent-color: #16a34a;
            --dark-color: #111827;
            --light-color: #f9fafb;
            --text-color: #374151;
            --border-radius: 12px;
            --transition: all 0.3s ease;
            --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
        }
        body {
            font-family: 'Helvetica Neue', 'Microsoft YaHei', sans-serif;
            color: var(--text-color);
            line-height: 1.7;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            color: var(--dark-color);
            margin-bottom: 1rem;
        }
        .section-header {
            text-align: center;
            margin-bottom: 3rem;
            position: relative;
        }
        .section-header::after {
            content: '';
            position: absolute;
            width: 80px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
            border-radius: 2px;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            border: none;
            border-radius: var(--border-radius);
            padding: 12px 28px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        .navbar {
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            padding: 1rem 0;
            transition: var(--transition);
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .nav-link {
            font-weight: 500;
            margin: 0 0.5rem;
            position: relative;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            background: var(--primary-color);
            left: 50%;
            bottom: 0;
            transition: var(--transition);
        }
        .nav-link:hover::after {
            width: 100%;
            left: 0;
        }
        .hero-section {
            background: linear-gradient(135deg, rgba(26, 86, 219, 0.9), rgba(126, 58, 242, 0.85)), url('https://images.unsplash.com/photo-1523050854058-8df90110c9f1?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 8rem 0 6rem;
            position: relative;
            overflow: hidden;
        }
        .hero-section h1 {
            color: white;
            font-size: 3.2rem;
            margin-bottom: 1.5rem;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
        }
        .service-card {
            background: white;
            border-radius: var(--border-radius);
            padding: 2rem;
            height: 100%;
            transition: var(--transition);
            border: 1px solid #e5e7eb;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--shadow);
            border-color: var(--primary-color);
        }
        .service-icon {
            width: 70px;
            height: 70px;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            color: white;
            font-size: 1.8rem;
        }
        .stats-section {
            background: linear-gradient(135deg, var(--dark-color), #2d3748);
            color: white;
            padding: 5rem 0;
        }
        .stat-item {
            text-align: center;
            padding: 1.5rem;
        }
        .stat-number {
            font-size: 3rem;
            font-weight: 800;
            background: linear-gradient(90deg, #fbbf24, #f59e0b);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1;
        }
        .team-card {
            border-radius: var(--border-radius);
            overflow: hidden;
            transition: var(--transition);
            background: white;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
        }
        .team-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow);
        }
        .team-img {
            height: 280px;
            object-fit: cover;
            width: 100%;
        }
        .flink {
            display: inline-block;
            padding: 0.5rem 1.2rem;
            background: #f3f4f6;
            border-radius: 50px;
            margin: 0.3rem;
            color: var(--text-color);
            text-decoration: none;
            transition: var(--transition);
            border: 1px solid #e5e7eb;
            font-size: 0.9rem;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-2px);
        }
        footer {
            background: var(--dark-color);
            color: #d1d5db;
            padding-top: 4rem;
        }
        .footer-links h5 {
            color: white;
            margin-bottom: 1.5rem;
            position: relative;
            padding-bottom: 0.8rem;
        }
        .footer-links h5::after {
            content: '';
            position: absolute;
            width: 40px;
            height: 3px;
            background: var(--primary-color);
            bottom: 0;
            left: 0;
        }
        .footer-links a {
            color: #9ca3af;
            text-decoration: none;
            display: block;
            margin-bottom: 0.8rem;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        .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;
            opacity: 0;
            transition: var(--transition);
            z-index: 1000;
            box-shadow: 0 4px 12px rgba(26, 86, 219, 0.3);
        }
        .back-to-top.visible {
            opacity: 1;
        }
        .contact-info-item {
            display: flex;
            align-items: flex-start;
            margin-bottom: 1.8rem;
        }
        .contact-icon {
            width: 50px;
            height: 50px;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.3rem;
            margin-right: 1.2rem;
            flex-shrink: 0;
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2.5rem;
            }
            .section-header {
                margin-bottom: 2rem;
            }
            .navbar-collapse {
                background: white;
                padding: 1rem;
                border-radius: var(--border-radius);
                box-shadow: var(--shadow);
                margin-top: 1rem;
            }
        }
        .news-card {
            border-radius: var(--border-radius);
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
            background: white;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
        }
        .news-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow);
        }
        .news-img {
            height: 220px;
            object-fit: cover;
            width: 100%;
        }
        .form-control, .form-select {
            border-radius: var(--border-radius);
            padding: 0.8rem 1rem;
            border: 1px solid #d1d5db;
            transition: var(--transition);
        }
        .form-control:focus, .form-select:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
        }
        .certificate-badge {
            display: inline-block;
            padding: 0.5rem 1.2rem;
            background: linear-gradient(135deg, var(--accent-color), #10b981);
            color: white;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-right: 0.5rem;
            margin-bottom: 0.5rem;
        }