@media only screen and (max-device-width : 736px)  
{
        .backtotop {
        display: none;
        position: fixed;
        right: 0;
        bottom: 2.5%;
        width: 50px;
        height: 50px;
        z-index: 5000;
        
    }
}

@media only screen and (min-device-width : 737px) and (max-device-width : 1024px)  
{
      .backtotop {
          display: none;
    }
}


@media only screen and (min-width : 0px) and  (min-device-width : 1025px)   
{
    .backtotop {
          display: none;
    }
}