@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-menu {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1.2rem;
    }

    .about-section h2,
    .products-section h2,
    .contact-section h2 {
        font-size: 2rem;
    }

    .features {
        grid-template-columns: 1fr;
    }

    .product-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .product-grid {
        grid-template-columns: 1fr;
    }

    .contact-form {
        padding: 1rem;
    }

    .form-group input,
    .form-group select {
        padding: 0.6rem;
    }

    button[type="submit"] {
        padding: 0.8rem 1.5rem;
    }
}

/* 桌面端样式调整 */
@media screen and (min-width: 1024px) {
    .container {
        padding: 0 30px;
    }
}

/* 平板设备 */
@media screen and (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.8rem;
    }
    
    .nav-menu {
        flex-direction: column;
        gap: 1rem;
    }
    
    .product-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* 移动设备 */
@media screen and (max-width: 480px) {
    .container {
        padding: 0 10px;
    }
    
    h1 {
        font-size: 1.8rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .button {
        width: 100%;
        text-align: center;
    }
    
    .product-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-form {
        padding: 1.5rem;
    }
}