:root {
            --primary-blue: #0d6efd;
            --secondary-blue: #0dcaf0;
            --dark-blue: #052c65;
            --light-gray: #f8f9fa;
            --dark-gray: #6c757d;
            --transition-speed: 0.3s;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: #333;
            line-height: 1.8;
            overflow-x: hidden;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            background: linear-gradient(90deg, var(--primary-blue), var(--secondary-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .hero-section {
            background: linear-gradient(135deg, rgba(13, 110, 253, 0.9) 0%, rgba(13, 202, 240, 0.85) 100%), url('https://images.unsplash.com/photo-1518770660439-4636190af475?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') no-repeat center center/cover;
            color: white;
            padding: 8rem 0;
            min-height: 90vh;
            display: flex;
            align-items: center;
        }
        .section-title {
            position: relative;
            padding-bottom: 1rem;
            margin-bottom: 3rem;
            font-weight: 700;
            color: var(--dark-blue);
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 80px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary-blue), var(--secondary-blue));
            border-radius: 2px;
        }
        .section-title.text-center::after {
            left: 50%;
            transform: translateX(-50%);
        }
        .card-hover {
            transition: transform var(--transition-speed), box-shadow var(--transition-speed);
            height: 100%;
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 1rem 3rem rgba(0, 0, 0, 0.175) !important;
        }
        .service-icon {
            font-size: 3rem;
            background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 1.5rem;
        }
        .flink {
            display: inline-block;
            padding: 0.5rem 1.5rem;
            margin: 0.5rem;
            background-color: var(--light-gray);
            border-radius: 50px;
            color: var(--dark-blue);
            text-decoration: none;
            transition: all var(--transition-speed);
            border: 1px solid #dee2e6;
        }
        .flink:hover {
            background: linear-gradient(90deg, var(--primary-blue), var(--secondary-blue));
            color: white;
            transform: scale(1.05);
        }
        .footer {
            background-color: var(--dark-blue);
            color: #e9ecef;
        }
        .footer a {
            color: #adb5bd;
            text-decoration: none;
            transition: color var(--transition-speed);
        }
        .footer a:hover {
            color: white;
        }
        .sticky-top {
            backdrop-filter: blur(10px);
            background-color: rgba(255, 255, 255, 0.95);
        }
        .btn-gradient {
            background: linear-gradient(90deg, var(--primary-blue), var(--secondary-blue));
            border: none;
            color: white;
            padding: 0.75rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            transition: all var(--transition-speed);
        }
        .btn-gradient:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(13, 110, 253, 0.3);
            color: white;
        }
        .contact-icon {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.5rem;
            margin-bottom: 1rem;
        }
        .timeline {
            position: relative;
            padding-left: 2rem;
            border-left: 3px solid var(--primary-blue);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 2.5rem;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -2.5rem;
            top: 0.5rem;
            width: 1rem;
            height: 1rem;
            border-radius: 50%;
            background-color: var(--primary-blue);
        }
        .img-hover-zoom {
            overflow: hidden;
            border-radius: 0.5rem;
        }
        .img-hover-zoom img {
            transition: transform 0.5s ease;
        }
        .img-hover-zoom:hover img {
            transform: scale(1.05);
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 5rem 0;
                min-height: 70vh;
            }
            .display-4 {
                font-size: 2.5rem;
            }
        }