.imgbox{overflow:hidden;background-color:#f7f7f7;position:relative;cursor:pointer;margin:0 4px 4px 0;border:1px solid #d9d9d9;border-radius:2px}.imgbox,.videomask{width:50px;height:50px}.videomask{position:absolute;margin:0 auto;line-height:55px;background:rgba(0,0,0,.3);text-align:center}.videomask .icon{display:inline-block;font-size:18px!important;color:#fff!important}