@import url("system.css");
@font-face {
	font-family: 'arrows';
	src:url('../../fonts/arrows/arrows.eot');
	src:url('../../fonts/arrows/arrows.eot?#iefix') format('embedded-opentype'),
url('../../fonts/arrows/arrows.woff') format('woff'),
url('../../fonts/arrows/arrows.ttf') format('truetype'),
url('../../fonts/arrows/arrows.svg#arrows') format('svg');
	font-weight: normal;
	font-style: normal;
}

.bb-custom-wrapper {
	width: 100%;
	overflow:hidden;
	position: relative;
	text-align: center;
	height:100%;
}

.bb-custom-wrapper h3 {
	font-size: 1.4em;
	font-weight: 300;
	margin: 0.4em 0 1em;
}

.bb-custom-wrapper nav {
	width: 100%;
	position:fixed;
	z-index: 0;
	left:0;
	top:0;
	text-align: center;
	overflow:hidden;
	margin: calc(((100vh - 650px) / 2) - 38px) 0 0 0;
	margin: -webkit-calc(((100vh - 650px) / 2) - 38px) 0 0 0;
	margin: -moz-calc(((100vh - 650px) / 2) - 38px) 0 0 0;	
}

.bb-custom-wrapper nav a {
	display: inline;
	border-radius: 1px;
	background: #424242;
	color: #999;
	padding:4px 14px;
	font-size:12px;
	font-family:"\5FAE\8F6F\96C5\9ED1"
}

.bb-custom-wrapper nav a:hover {
	opacity: 0.6;
}

.bb-custom-icon:before {
	font-family: 'arrows';
	speak: none;
	font-style: normal;
	font-weight: normal;
	font-variant: normal;
	text-transform: none;
	line-height: 1;
	font-size: 20px;
	line-height: 30px;
	display: block;
	-webkit-font-smoothing: antialiased;
}

.bb-custom-icon-first:before,
.bb-custom-icon-last:before {
	content: "\e002";
}

.bb-custom-icon-arrow-left:before,
.bb-custom-icon-arrow-right:before {
	content: "\e003";
}

.bb-custom-icon-arrow-left:before,
.bb-custom-icon-first:before {
	-webkit-transform: rotate(180deg);
	-moz-transform: rotate(180deg);
	-ms-transform: rotate(180deg);
	transform: rotate(180deg);
}

/* No JS */
.no-js .bb-custom-wrapper {
	height: auto;
}

.no-js .bb-custom-content {
	height: 470px;
}
.bb-bookblock{ width:100%; height:650px;

	margin: calc((100vh - 650px) / 2) 0 0 0;
	margin: -webkit-calc((100vh - 650px) / 2) 0 0 0;
	margin: -moz-calc((100vh - 650px) / 2) 0 0 0;	
}
.bb-item{ background:#000;}
.bb-item img{ max-height:100%; }
/* 返回顶部 */
.backtonear{
	position:fixed;
	top:0;
	right:50px;
	height:25px;
	width:25px;
	z-index:9999;
	margin: calc(((100vh - 650px) / 2) - 38px) 0 0 0;
	margin: -webkit-calc(((100vh - 650px) / 2) - 38px) 0 0 0;
	margin: -moz-calc(((100vh - 650px) / 2) - 38px) 0 0 0;	
}
.backtonear img{
	width:100%;
}