body,p{margin:0;padding:0}.online{position:fixed;top:-100px;width:100%;height:48px;line-height:48px;font-size:16px;color:#fff;background:#d32d2d;text-align:center;transition:all .5s}.online i{margin-right:10px;color:#fff}.online.active{position:relative;top:0}@media all and (max-width:768px){.online{font-size:12px}.online a{margin:0 5px}}