html,body,#app{height:100%;margin:0;padding:0}*{margin:0;padding:0;box-sizing:border-box}html,body{height:100%;font-family:Helvetica Neue,Helvetica,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Arial,sans-serif}.el-main{background-color:#f5f5f5}