body,form,h3,input,li,p,ul{margin:0;padding:0;font-size:.14rem}input{-webkit-appearance:none}ul{list-style:none}img{border:none;vertical-align:top}a{text-decoration:none;color:#353535}html{font-size:100px}.middle{left:50%;top:50%;transform:translate(-50%,-50%);position:absolute}body{font-size:.14rem;color:#353535;background:#f7f7f7;font-family:Helvetica Neue,Helvetica,PingFang SC,Tahoma,Arial,sans-serif}.item-center{display:flex;align-items:center}.row-center{justify-content:center}