@media screen and (max-width:321px){
    body{font-size:10px;font-family: "微软雅黑";}
}

@media screen and (min-width:321px) and (max-width:400px){
    body{font-size:12px;font-family: "微软雅黑";}
}

@media screen and (min-width:400px){
    body{font-size:14px;font-family: "微软雅黑";}
}
html,body{
    width: 100%;
    height: 100%;
}