CSS ändern sich, wenn mobil
//CSS
.visibledevice {display:none;}
.visibledesktop {display:display;}
@media (max-width : 320px) {
.visibledevice {display:block;}
.visibledesktop {display:none;}
}
//in the page
<div class="visibledesktop">this displays for desktop and tablet</div>
<div class="visibledevice">this displays for mobile</div>
Blue Duck