#app{width:100%;height:100%}#app .el-backtop .el-icon{color:#000}*{box-sizing:border-box}body,html{width:100%;height:100%;font-size:14px;color:#333}body,dd,dl,h1,h3,h4,html,p,ul{padding:0;margin:0}a{text-decoration:none;color:#333;outline:none}img{max-width:100%;max-height:100%;vertical-align:middle}ul{list-style:none}#app{-webkit-user-select:auto;-moz-user-select:auto;user-select:auto}