.boxTopSx {
 height: calc(50% - 25px)!important;
 }
.boxTopDx {
 height: calc(50% - 25px)!important;
 }
.boxBottomSx {
 height: calc(50% - 25px)!important;
 }
.boxBottomDx {
 height: calc(50% - 25px)!important;
 }