.loading{width:100%;text-align:center;position:fixed;left:0;top:0;z-index:999999;height:100%;background:rgba(0,0,0,.4)}.loading div{position:absolute;top:50%;left:50%;transform:translateX(-50%) translateY(-50%);-moz-transform:translateX(-50%) translateY(-50%);-webkit-transform:translateX(-50%) translateY(-50%);-ms-transform:translateX(-50%) translateY(-50%);-o-transform:translateX(-50%) translateY(-50%);background:#fff;width:200px;height:200px;line-height:200px;opacity:.5;border-radius:5px}