div.example {
    background-color: yellow;
    padding: 20px;
}

.custom-moblile-header {
    display: none;
}


@media screen and (max-width: 992px) {

    .custom-moblile-header {
        display: block;
    }

    .custom-dont-show-on-mobile {
        display: none;
    }


    div.example {
        display: none;
        visibility: hidden;
    }

}