.layer_board_bg,
.layer_board {
	position: absolute;
}

.layer_board_bg {
	position: fixed;
	width: 100%;
	height: 100%;

	z-index: 2000;

	top: 0;
	left: 0;

	display: none;
	cursor: pointer;
	background: #000;
}

.layer_board {
	display: none;
	position: fixed;
	text-align: center;
	z-index: 3000;
	width: 85%;
	max-width: 880px;
	left: 50%;
	top: 50%;
	transform: translate(-50%, -50%);
}

.btn_close {
	color: #fff;
	font-size: 16px;
	margin-top: 1em;
	cursor: pointer;
}