.header-group aside .down-btn{color:#fff;background:#33cccc;padding-left:50px;transition:all .3s ease}.header-group aside .down-btn .down-bg{background:transparent url(../images/common/btn-down-client-on.gif) no-repeat 0 0 /cover;transition:all .3s ease}.header-group aside .down-bg .ef{position:absolute;display:none;z-index:2}.header-group aside .down-btn:hover .ef{display:inline-block}.header-group aside .down-bg .ef01{top:20px;left:20px;width:20px;height:20px;background:transparent url(../images/common/btn-down-ef01.png) no-repeat center center /100%;animation:zoom .7s ease infinite}.header-group aside .down-bg .ef02{top:10px;right:10px;width:20px;height:20px;background:transparent url(../images/common/btn-down-ef02.png) no-repeat center center /100%;animation:zoom2 .5s ease infinite}.header-group aside .down-bg .ef03{bottom:5px;right:50px;width:20px;height:20px;background:transparent url(../images/common/btn-down-ef03.png) no-repeat center center /100%;animation:zoom3 1s ease infinite}