.tooltip{
background-color:#5c9bb7;
background-image:-webkit-linear-gradient(top, #5c9bb7, #5392ad);
background-image:-moz-linear-gradient(top, #5c9bb7, #5392ad);
background-image:linear-gradient(top, #5c9bb7, #5392ad);
box-shadow: 0 1px 1px #ccc;
border-radius:3px;
width: 290px;
padding: 10px;
position: absolute;
left:50%;
margin-left:-150px;
top: 80px;
}
.tooltip:after{
/* 提示信息 */
content:'';
position:absolute;
border:6px s