.dom-back-banner {
    position: fixed;
    top: 0;
    height: 100%;
    width: 100%;
    z-index: 1;
    background-position: 50% 0;
    background-repeat: no-repeat;
}
@media screen and (max-width: 1200px) {

    .dom-back-banner {
        display: none;
    }

}