那個新增的背景不顯示？層級設置到6都不顯示，但在控制臺看到效果都在沒被覆蓋，盒模型也正常

#page2>.loading-bg{
	position:?absolute;
????z-index:4;
????height:?100%;
????width:?100%;
????background-color:#ef1639;
????animation:loading?2s?linear?forwards;
????-webkit-animation:loading?2s?linear?forwards;
}
@-webkit-keyframes?loading?{
	from?{??
		opacity:?1;
	}
	to?{opacity:?0;}
}
@-o-keyframes?loading?{
	from?{??
		opacity:?1;
	}
	to?{opacity:?0;}
}
@-moz-keyframes?loading?{
	from?{??
		opacity:?1;
	}
	to?{opacity:?0;}
}
@keyframes?loading?{
	from?{??
		opacity:?1;
	}
	to?{opacity:?0;}
}