Mobile Responsive Media screen CSS

@media (min-width:176px){
.topmenu{display:none;}

}
@media (min-width:576px){
.topmenu{display:none;}

}
@media (min-width:768px){
.topmenu{display:block;}
}

@media (min-width:992px){
.topmenu{display:block;}
}

@media (min-width:1200px){
.topmenu{display:block;}
}