body{height:100vh;margin:50px}.content{text-align:center;margin-bottom:50px}.logo{position:absolute;top:50px;left:50px;width:150px;margin:0}.config ul{width:50%;margin:0 auto;list-style-type:none}footer{position:fixed;bottom:0;width:100%;text-align:center;padding:10px 0}