@media screen and (min-width: 768px) {
     .picbanner {
         display: none !important;
     }

     .mpicbanner {
         display: block !important;
     }
 }

 @media screen and (max-width: 768px) {
     .picbanner {
         display: block !important;
     }

     .mpicbanner {
         display: none !important;
     }
 }