.menu{cursor:pointer;width:28px;height:22px;position:relative;list-style:none;padding:0;margin:0}.menu li{position:absolute;left:0;width:100%;height:2px;background:#000;border-radius:3px;transition:transform .3s cubic-bezier(.4,0,.2,1),opacity .2s ease}.menu li:nth-child(1){top:0}.menu li:nth-child(2){top:10px}.menu li:nth-child(3){top:20px}.menu.open li:nth-child(1){transform:translateY(10px) rotate(45deg)}.menu.open li:nth-child(2){opacity:0}.menu.open li:nth-child(3){transform:translateY(-10px) rotate(-45deg)}.menu-arrow{display:inline-block;transition:transform .2s ease}#langList{opacity:0;visibility:hidden;pointer-events:none;transform:translateY(-6px);transition:opacity .2s ease,transform .2s ease,visibility .2s ease}#langList.open{opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0)}#langBtn .arrow{transition:transform .2s ease}#langBtn .arrow.rotate-180{transform:rotate(180deg)}.sticky-header{position:sticky;top:0;transition:transform .35s ease,box-shadow .3s ease;will-change:transform;z-index:60}.sticky-header.hide{transform:translateY(-100%)}.sticky-header.show{transform:translateY(0)}