.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:230px;height:230px;display:inline-block;margin:20px;}