html,body {
	height: 100%;
	width: 100%;
	margin: 0;
}

* 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;
    top:10%;
	margin: 0 auto;
	text-align: center;
	z-index: 2000;
	width: 100%;
}
.layer_board img{
    max-width: 800px;
}
.btn_close{
margin: 25px 0 0 0}