#weixin-tip{display:none; position: fixed; left:0; top:0; background: rgba(0,0,0,0.8); filter:alpha(opacity=80); width: 100%; height:100%; z-index: 100000;}
#weixin-tip p{text-align: center; margin-top: 10%; padding:0 5%; position: relative;}
#weixin-tip .close{
    color: #fff;
    padding: 5px;
    font: bold 20px/20px simsun;
    text-shadow: 0 1px 0 #ddd;
    position: absolute;
    top: 0; left: 5%;
}