.ch-grid{margin:20px 0 0 0;padding:0;list-style:none;display:block;text-align:center;width:100%;}.ch-grid:after,.ch-item:before{content:'';display:table;}.ch-grid:after{clear:both;}.ch-grid li{width:400px;height:400px;display:inline-block;margin:20px 0px 10px 0px;padding:0px;}