#msg {
	position: fixed;
	left: 0;
	top: 0;
	z-index: 900;
	width: 100%;
	height: 100%;
	background: rgba(0,0,0,0.8);
	display: none;
}
#msg > div {
	display: table;
	width: 100%;
	height: 100%;
}
#msg > div > div {
	display: table-cell;
	vertical-align: middle;
	text-align: center;
}
#msg .banner {
	display: inline-block;
}
#msg #back {
	display: block;
	position: absolute;
	right: 10px;
	top: 22px;
	z-index: 910;
	width: 32px;
	height: 32px;
}
#msg #back:before,
#msg #back:after {
	content: "";
	display: block;
	width: 32px;
	height: 2px;
	background-color: #999;
	position: absolute;
}
#msg #back:before {
	transform: rotate(45deg);
}
#msg #back:after {
	transform: rotate(-45deg);
}
@media screen and (max-width: 600px) {
	#msg .banner img {
		width: 98%;
		height: auto;
	}
}