* 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;
	left: 25%;
	top:5%;	
	text-align: center;
	z-index: 2000;
}


@media screen and (max-width: 640px)
{
.layer_board {
    position:fixed;
	left:0%
}
.layer_board img {
	width:85%
}
.btn_close img{
	width:50px
}
}