.lib-tip{
	position: fixed;
	z-index: 31;
	left: 50%;
	bottom: 15%;
	margin-left: -110px;
	color: white;
	text-align: center;
	border-radius: 5px;
	width: 220px;
	height: 30px;
	line-height: 30px;
	overflow: hidden;
	text-overflow: ellipsis;
	white-space: nowrap;
	background: rgba(33, 33, 33, 0.8);
	font-size: 13px;
}