.ds-3col-stacked > .group-header{clear:both;}.ds-3col-stacked > .group-left{width:25%;float:left;}.ds-3col-stacked > .group-middle{width:50%;float:left;}.ds-3col-stacked > .group-right{width:25%;float:right;}.ds-3col-stacked > .group-footer{clear:both;}