html,body {
	height: 100%;
}


.layer_board_bg,
.layer_board {
	position: absolute;
}

.layer_board_bg {
	position: fixed;
	width: 100%;
	height: 100%;
	z-index: 1000;
	top: 0;
	left: 0;
	display: none;
	cursor: pointer;
	background: #FFF;
}

.layer_board {
	display: none;
	position: fixed;
	top: 50%;
	left: 50%;
	transform: translate(-50%,-50%);
	background: #fff;
	text-align: center;
	z-index: 2000;
	padding: 50px
}
.layer_board p {
	margin-bottom: 50px
}
.btn_close {
	display: block;
	text-decoration: none;
	background: #000;
	color: #fff;
	text-align: center;
	padding: 20px 40px;
	width: 200px;
	margin: 0 auto
}