:root {
            --primary-color: #1e3a8a;
            --secondary-color: #dc2626;
            --accent-color: #fbbf24;
            --text-dark: #1f2937;
            --text-light: #6b7280;
            --background-light: #f9fafb;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: var(--text-dark);
            line-height: 1.6;
        }
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color);
        }
        .hero-section {
            background: linear-gradient(rgba(30, 58, 138, 0.9), rgba(30, 58, 138, 0.8)), url('https://images.unsplash.com/photo-1575361204480-aadea25e6e68?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') no-repeat center center/cover;
            color: white;
            padding: 100px 0;
        }
        .section-title {
            color: var(--primary-color);
            border-left: 5px solid var(--secondary-color);
            padding-left: 15px;
            margin-bottom: 30px;
        }
        .card {
            border: none;
            border-radius: 12px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            transition: transform 0.3s ease;
            height: 100%;
        }
        .card:hover {
            transform: translateY(-10px);
        }
        .card-img-top {
            border-top-left-radius: 12px;
            border-top-right-radius: 12px;
            height: 200px;
            object-fit: cover;
        }
        .service-icon {
            font-size: 3rem;
            color: var(--secondary-color);
            margin-bottom: 15px;
        }
        .team-img {
            width: 150px;
            height: 150px;
            object-fit: cover;
            border-radius: 50%;
            border: 5px solid var(--accent-color);
        }
        .testimonial-card {
            background-color: var(--background-light);
            border-left: 4px solid var(--primary-color);
        }
        .friendlink {
            background-color: #f1f5f9;
            padding: 40px 0;
        }
        .flink {
            display: inline-block;
            margin: 10px 15px;
            padding: 10px 20px;
            background: white;
            border-radius: 8px;
            color: var(--primary-color);
            text-decoration: none;
            border: 2px solid transparent;
            transition: all 0.3s ease;
        }
        .flink:hover {
            border-color: var(--secondary-color);
            color: var(--secondary-color);
            transform: scale(1.05);
        }
        footer {
            background-color: var(--primary-color);
            color: white;
        }
        .social-icon {
            font-size: 1.5rem;
            margin: 0 10px;
            color: white;
            transition: color 0.3s;
        }
        .social-icon:hover {
            color: var(--accent-color);
        }
        .btn-custom {
            background-color: var(--secondary-color);
            color: white;
            padding: 12px 30px;
            border-radius: 8px;
            border: none;
            transition: background-color 0.3s;
        }
        .btn-custom:hover {
            background-color: #b91c1c;
        }
        @media (max-width: 768px) {
            .hero-section h1 {
                font-size: 2rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
        }