.img-banner-mobile {display: none;}
    @@media only screen and (min-width: 768px) and (max-width: 900px) {
        .img-banner { display:none; }
        .img-banner-mobile {display: block;}
    }
    @@media only screen and (max-width: 500px) {
        .img-banner { display:none; }
        .img-banner-mobile {display: block;}
    }