:root {
            --primary-color: #0056b3;
            --secondary-color: #28a745;
            --accent-color: #ffc107;
            --dark-color: #343a40;
            --light-color: #f8f9fa;
            --transition: all 0.3s ease-in-out;
        }
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            line-height: 1.8;
            color: #333;
            overflow-x: hidden;
        }
        .hero-section {
            background: linear-gradient(rgba(0, 84, 179, 0.85), rgba(0, 84, 179, 0.9)), url('https://images.unsplash.com/photo-1581094794329-c8112a89af12?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80') center/cover no-repeat;
            color: white;
            padding: 120px 0;
        }
        .section-title {
            position: relative;
            padding-bottom: 15px;
            margin-bottom: 40px;
            font-weight: 700;
            color: var(--dark-color);
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 80px;
            height: 4px;
            background: var(--primary-color);
            border-radius: 2px;
        }
        .card-hover {
            transition: var(--transition);
            border: 1px solid #dee2e6;
            height: 100%;
        }
        .card-hover:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
            border-color: var(--primary-color);
        }
        .btn-custom {
            background: var(--primary-color);
            color: white;
            padding: 12px 30px;
            border-radius: 30px;
            font-weight: 600;
            transition: var(--transition);
            border: 2px solid var(--primary-color);
        }
        .btn-custom:hover {
            background: transparent;
            color: var(--primary-color);
            border-color: var(--primary-color);
        }
        .navbar {
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            background: rgba(255, 255, 255, 0.95) !important;
            padding-top: 15px;
            padding-bottom: 15px;
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.8rem;
            color: var(--primary-color) !important;
        }
        .nav-link {
            font-weight: 600;
            margin: 0 10px;
            color: var(--dark-color) !important;
            transition: var(--transition);
        }
        .nav-link:hover {
            color: var(--primary-color) !important;
        }
        footer {
            background: var(--dark-color);
            color: var(--light-color);
            padding: 60px 0 20px;
        }
        .footer-links a {
            color: #ccc;
            text-decoration: none;
            transition: var(--transition);
            display: block;
            margin-bottom: 10px;
        }
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        .friendlink {
            background: #f8f9fa;
            padding: 40px 0;
            border-top: 1px solid #dee2e6;
        }
        .flink {
            display: inline-block;
            background: white;
            padding: 12px 25px;
            margin: 10px;
            border-radius: 8px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            color: var(--dark-color);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
            border: 1px solid #dee2e6;
        }
        .flink:hover {
            background: var(--primary-color);
            color: white;
            transform: scale(1.05);
            border-color: 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;
            transition: var(--transition);
        }
        .contact-info:hover i {
            background: var(--secondary-color);
            transform: rotate(360deg);
        }
        .product-img {
            height: 220px;
            object-fit: cover;
            width: 100%;
            border-radius: 8px 8px 0 0;
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 80px 0;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .navbar-brand {
                font-size: 1.5rem;
            }
        }