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;
    margin: 0 auto;
	text-align: center;
	z-index: 2000;
    width: 100%;
}
.layer_board a {
    display: inline-block;
    margin-right: 20px;
    background-color:#fff;
}
.layer_board a img {
    background-color:#fff;
    border:solid 2px #ff7bac;
    max-width:100%;
    vertical-align: bottom;
}
.layer_board iframe {
    width: 964px;
    height: 542px;
}
.btn_close {
    color: #fff;
    text-align: right;
    font-size: 50px;
    position: relative;
    top: 0;
    right: 50px;
    cursor: pointer;
}
@media screen and (max-width: 768px) {
    .layer_board iframe {
        width: 600px;
        height: 340px;
    }
}
@media screen and (max-width: 640px) {
    .layer_board iframe {
        width: 440px;
        height: 250px;
    }
}
@media screen and (max-width: 480px) {
    .layer_board iframe {
        width: 400px;
        height: 220px;
    }
}
@media screen and (max-width: 414px) {
    .layer_board iframe {
        width: 300px;
        height: 170px;
    }
}