#tip{
    padding:11px 15px;
    color:#fff;
    border-radius: 2px;
    min-width:100px;
    font-size: 16px;
    line-height: 26px;
    text-align:center;
    position:fixed;
    z-index:9999;
}
#tip.alert-info{
    background:rgba(0,0,0,.6);
}
#tip.alert-success{
    background: rgba(0,0,0,.6);
    width: 220px;
}
#tip.alert-danger{
    background: #f8858a;
    width: 220px;
}