div.portfolio-thumb {float:left;width:420px;overflow:hidden;}
div.viewport {position:relative;width:388px;height:400px;overflow:hidden;float:left;}
div.items {position:absolute;width:1940px;left:0px;}
div.thumb {display:block;float:left;width:388px;text-align:center;}
.arr {margin:110px 0;cursor:pointer;}