#all{font-family:Avenir,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;display:flex;flex-direction:column;height:100vh;position:relative}#all .return{position:absolute;top:8px;border-radius:15px;cursor:pointer}#all .return img{width:100px;height:40px}#all .main{flex:1}