html,body {
	height: 100%;
}


* html .layer_board_bg,
* html .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: #000;
}

.layer_board {
	display: none;
	position: fixed;
	width:90%;
	max-width:960px;
	text-align: center;
	z-index: 2000;
	top:40px;
	left:50%;
	transform: translate(-50%, 0%);

}

.layer_board .btn_close{
	max-width:200px;
	margin:0 auto;
	margin-top:20px;
}
.layer_board .btn_close:hover{
	opacity:0.7;
}
    
@media(max-width:768px){
	.layer_board {
		width: 95%;
		margin: 20px auto;
	}
	.layer_board .btn_close{
		max-width:100px;
		margin-top:10px;
	}
}