.mm-back-top{font-family:"Monospaced Number","Chinese Quote",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Helvetica,Arial,sans-serif;font-size:14px;line-height:1.5;color:#5d5d5d;-webkit-box-sizing:border-box;box-sizing:border-box;margin:0;padding:0;list-style:none;position:fixed;right:30px;bottom:30px;cursor:pointer;z-index:10}.mm-back-top-inner{padding:12px 16px;background-color:rgba(0,0,0,.6);border-radius:2px;-webkit-box-shadow:0 1px 3px rgba(0,0,0,.2);box-shadow:0 1px 3px rgba(0,0,0,.2)}.mm-back-top-inner-icon{-webkit-transform:rotate(180deg);transform:rotate(180deg)}.mm-back-top-inner:hover{background-color:rgba(0,0,0,.7)}