.mask {
	position: fixed;
	/* left: 44%; */
	top: 32%;
	left: 50%;
	transform: translate(-52%, -45%);
	-webkit-transform: translate(-52%, -45%);
	-o-transform: translate(-52%, -45%);
	-moz-transform: translate(-52%, -45%);
	-ms-transform: translate(-52%, -45%);
	/* display: none; */
	/* top: 300px; */
	padding: 0.24rem 0.32rem;
	box-sizing: border-box;
	background: rgba(0, 0, 0, 0.6);
	border-radius: 0.1rem;
	font-size: 0.18rem;
	color: rgba(255, 255, 255, 1);
	z-index: 1000;
}