@media only screen and (max-width: 480px) {

    .nav-tab li {
        width: 100%;
    }

    .listing-product {
        margin-left: 0;
        margin-right: 0;
    }

    .listing-product li {
        width: 100%;
        padding-left: 0;
        padding-right: 0;
    }
}