.ding{position:relative;width:0px;height:0px;left:100%;top:100%;font-weight:bold;color:#fff}
.menu{position:absolute;width:20px;height:20px;left:-24px;top:-24px;background-color:rgba(160,160,160,0.5);border-radius:5px;border-style:solid;border-width:1px;line-height:20px;z-index:1}
.menu:hover .mulu{display:block}
.mulu{position:absolute;width:90px;height:90px;left:-71px;top:-71px;background-color:rgba(160,160,160,1);border-radius:5px;border-style:solid;border-width:1px;line-height:8px;z-index:1;display:none}
.mulu a{text-decoration:none}
.mulu a:hover{color:#fff}