:root {
            --primary-blue: #0a58ca;
            --secondary-blue: #1e70c1;
            --accent-teal: #20c997;
            --dark-bg: #1a1d28;
            --light-bg: #f8f9fa;
            --text-dark: #212529;
            --text-light: #f8f9fa;
            --shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease-in-out;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: var(--text-dark);
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5 {
            font-weight: 700;
            margin-bottom: 1rem;
        }
        .section-padding {
            padding: 5rem 0;
        }
        .hero-section {
            background: linear-gradient(135deg, var(--primary-blue) 0%, var(--dark-bg) 100%);
            color: var(--text-light);
            padding: 8rem 0 6rem;
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 600" opacity="0.05"><path d="M0,0 L1200,0 L1200,600 L0,600 Z" fill="none"/><path d="M0,300 Q600,50 1200,300 L1200,600 L0,600 Z" fill="white"/></svg>') no-repeat center;
            background-size: cover;
        }
        .nav-shadow {
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
        }
        .btn-primary-custom {
            background-color: var(--accent-teal);
            border-color: var(--accent-teal);
            color: white;
            padding: 0.75rem 2rem;
            border-radius: 50px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-primary-custom:hover {
            background-color: #1ba87e;
            border-color: #1ba87e;
            transform: translateY(-3px);
            box-shadow: var(--shadow);
        }
        .service-card {
            background: white;
            border-radius: 15px;
            padding: 2.5rem 2rem;
            height: 100%;
            transition: var(--transition);
            border: 1px solid #eee;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.03);
        }
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--shadow);
            border-color: var(--accent-teal);
        }
        .service-icon {
            width: 80px;
            height: 80px;
            background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
        }
        .stats-number {
            font-size: 3rem;
            font-weight: 800;
            color: var(--primary-blue);
            line-height: 1;
        }
        .client-logo {
            filter: grayscale(100%);
            opacity: 0.6;
            transition: var(--transition);
            max-height: 50px;
        }
        .client-logo:hover {
            filter: grayscale(0);
            opacity: 1;
        }
        .flink {
            display: inline-block;
            padding: 0.5rem 1.2rem;
            margin: 0.3rem;
            background: #f1f5f9;
            border-radius: 30px;
            color: var(--text-dark);
            text-decoration: none;
            transition: var(--transition);
            border: 1px solid #e2e8f0;
            font-size: 0.95rem;
        }
        .flink:hover {
            background: var(--primary-blue);
            color: white;
            border-color: var(--primary-blue);
            transform: translateY(-2px);
        }
        footer {
            background-color: var(--dark-bg);
            color: #a0aec0;
        }
        .footer-link {
            color: #cbd5e0;
            text-decoration: none;
            transition: color 0.2s;
        }
        .footer-link:hover {
            color: white;
        }
        .animate-on-scroll {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.8s, transform 0.8s;
        }
        .animate-on-scroll.visible {
            opacity: 1;
            transform: translateY(0);
        }
        .contact-info li {
            margin-bottom: 1rem;
            padding-left: 1.8rem;
            position: relative;
        }
        .contact-info li i {
            position: absolute;
            left: 0;
            top: 0.3rem;
            color: var(--accent-teal);
        }
        .news-card {
            border-radius: 12px;
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
            border: 1px solid #e9ecef;
        }
        .news-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow);
        }
        .news-card img {
            height: 220px;
            object-fit: cover;
            width: 100%;
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: 3rem 0;
            }
            .hero-section {
                padding: 6rem 0 4rem;
            }
            .display-4 {
                font-size: 2.5rem;
            }
            .stats-number {
                font-size: 2.5rem;
            }
        }