:root {
            --primary-color: #0d47a1;
            --secondary-color: #d32f2f;
            --accent-color: #ff9800;
            --dark-color: #1a237e;
            --light-color: #f5f7fa;
            --text-dark: #333;
            --text-light: #666;
        }
        body {
            font-family: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
            color: var(--text-dark);
            line-height: 1.8;
            overflow-x: hidden;
        }
        .gradient-bg {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--dark-color) 100%);
        }
        .hero-section {
            background: linear-gradient(rgba(13, 71, 161, 0.9), rgba(26, 35, 126, 0.9)), url('https://images.unsplash.com/photo-1558618666-fcd25c85cd64?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 150px 0;
            position: relative;
        }
        .section-title {
            position: relative;
            padding-bottom: 20px;
            margin-bottom: 50px;
            text-align: center;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--secondary-color);
        }
        .card-hover {
            transition: all 0.3s ease;
            border: none;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        .btn-primary-custom {
            background: var(--primary-color);
            border: none;
            padding: 12px 30px;
            border-radius: 50px;
            font-weight: 600;
            transition: all 0.3s ease;
        }
        .btn-primary-custom:hover {
            background: var(--dark-color);
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.2);
        }
        .nav-link {
            font-weight: 600;
            margin: 0 10px;
            position: relative;
        }
        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 3px;
            background: var(--secondary-color);
            transition: width 0.3s ease;
        }
        .nav-link:hover::after, .nav-link.active::after {
            width: 100%;
        }
        .footer {
            background: #1a1a1a;
            color: #ccc;
            padding: 70px 0 20px;
        }
        .flink {
            display: inline-block;
            background: rgba(255,255,255,0.1);
            padding: 8px 20px;
            margin: 5px 10px 5px 0;
            border-radius: 4px;
            color: #ddd;
            text-decoration: none;
            transition: all 0.3s ease;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-2px);
        }
        .service-icon {
            font-size: 3rem;
            color: var(--primary-color);
            margin-bottom: 20px;
        }
        .timeline {
            position: relative;
            padding-left: 30px;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 4px;
            background: var(--primary-color);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 30px;
            padding-left: 30px;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -38px;
            top: 5px;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--secondary-color);
            border: 4px solid white;
            box-shadow: 0 0 0 4px var(--primary-color);
        }
        .contact-info i {
            width: 40px;
            height: 40px;
            background: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin-right: 15px;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 100px 0;
                text-align: center;
            }
            .display-4 {
                font-size: 2.2rem;
            }
            .section-title {
                margin-bottom: 30px;
            }
        }