*{
    padding: 0;
    margin: 0;
    font-family: "微软雅黑";
}
a{
    text-decoration: none;
}
li{
    list-style: none;
}
.lf{
    float: left;
}
.rg{
    float: right;
}
.clearFix::after{
    content: "";
    display: block;
    clear: both;
}
.mar{
    margin: 0 auto;
}