.back-top{color:#fff;background:#70a8ba;font-size:18px;line-height:100%;position:fixed;right:0;bottom:0;padding:10px;display:block;z-index:100;cursor:pointer}nav{transition:height .5s cubic-bezier(.07,.405,.555,.91)}#menu li a{display:inline-block;line-height:45px;font-size:.9rem}#menu li a:hover{color:#fff;background:#272727;cursor:pointer}#menubar{position:sticky;height:45px;top:0}#home a:hover{color:#008cba}@media(max-width:640px){#menu li{height:50px}.active{height:274px}}