.el-sign{
	display: block;
    margin-bottom: 1em;
}
.sign{
	cursor: pointer;
	position: relative;
}
.sign .desc{
    display:none;
    min-width: 320px;
    margin-left:50px;
    padding:10px;
    margin-top:17px;
    background:#f3f3f3;    
    -moz-box-shadow:0 5px 5px rgba(0,0,0,0.3);
    -webkit-box-shadow:0 5px 5px rgba(0,0,0,0.3);
    box-shadow:0 5px 5px rgba(0,0,0,0.3);
	font-size:12px;
}
.sign:hover .desc{
    display: block;
    position: absolute;
    z-index: 9999;
    top: 10px;
    left: -35px;
}