/* 主要用于让外层的过度效果起作用 */
.bb-wrap-box{
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0%;
	z-index: 10;
	display: none;
}
@keyframes bbFadeOut {
	0%{
		opacity: 1;
	}
	100%{
		opacity: 0.5;
	}
}
.bb-fadeOut{
	animation: bbFadeOut 0.5s both;
}

.bb-bookblock {
	margin: 0 auto;
	position: relative;
	z-index: 100;
	-webkit-perspective: 1300px;
	-moz-perspective: 1300px;
	perspective: 1300px;
	-webkit-backface-visibility: hidden;
	-moz-backface-visibility: hidden;
	backface-visibility: hidden
}

.bb-page {
	position: absolute;
	-webkit-transform-style: preserve-3d;
	-moz-transform-style: preserve-3d;
	transform-style: preserve-3d;
	-webkit-transition-property: -webkit-transform;
	-moz-transition-property: -moz-transform;
	transition-property: transform
}

.bb-vertical .bb-page {
	width: 50%;
	height: 100%;
	left: 50%;
	-webkit-transform-origin: left center;
	-moz-transform-origin: left center;
	transform-origin: left center
}

.bb-horizontal .bb-page {
	width: 100%;
	height: 50%;
	top: 50%;
	-webkit-transform-origin: center top;
	-moz-transform-origin: center top;
	transform-origin: center top
}

.bb-page>div,
.bb-outer,
.bb-content,
.bb-inner {
	position: absolute;
	height: 100%;
	width: 100%;
	top: 0;
	left: 0;
	background: #fff
}

.bb-vertical .bb-content {
	width: 200%
}

.bb-horizontal .bb-content {
	height: 200%
}

.bb-page>div {
	width: 100%;
	-webkit-transform-style: preserve-3d;
	-moz-transform-style: preserve-3d;
	transform-style: preserve-3d
}

.bb-page>div:not(:only-child) {
	-webkit-backface-visibility: hidden;
	-moz-backface-visibility: hidden;
	backface-visibility: hidden
}

.bb-vertical .bb-back {
	-webkit-transform: rotateY(-180deg);
	-moz-transform: rotateY(-180deg);
	transform: rotateY(-180deg)
}

.bb-horizontal .bb-back {
	-webkit-transform: rotateX(-180deg);
	-moz-transform: rotateX(-180deg);
	transform: rotateX(-180deg)
}

.bb-outer {
	width: 100%;
	overflow: hidden;
	z-index: 999
}

.bb-overlay,
.bb-flipoverlay {
	background-color: rgba(0, 0, 0, .7);
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	opacity: 0
}

.bb-flipoverlay {
	background-color: rgba(0, 0, 0, .2)
}

.bb-bookblock.bb-vertical>div.bb-page:first-child,
.bb-bookblock.bb-vertical>div.bb-page:first-child .bb-back {
	-webkit-transform: rotateY(180deg);
	-moz-transform: rotateY(180deg);
	transform: rotateY(180deg)
}

.bb-bookblock.bb-horizontal>div.bb-page:first-child,
.bb-bookblock.bb-horizontal>div.bb-page:first-child .bb-back {
	-webkit-transform: rotateX(180deg);
	-moz-transform: rotateX(180deg);
	transform: rotateX(180deg)
}

.bb-vertical .bb-front .bb-content {
	left: -100%
}

.bb-horizontal .bb-front .bb-content {
	top: -100%
}

.bb-vertical .bb-flip-next,
.bb-vertical .bb-flip-initial {
	-webkit-transform: rotateY(-180deg);
	-moz-transform: rotateY(-180deg);
	transform: rotateY(-180deg)
}

.bb-vertical .bb-flip-prev {
	-webkit-transform: rotateY(0deg);
	-moz-transform: rotateY(0deg);
	transform: rotateY(0deg)
}

.bb-horizontal .bb-flip-next,
.bb-horizontal .bb-flip-initial {
	-webkit-transform: rotateX(180deg);
	-moz-transform: rotateX(180deg);
	transform: rotateX(180deg)
}

.bb-horizontal .bb-flip-prev {
	-webkit-transform: rotateX(0deg);
	-moz-transform: rotateX(0deg);
	transform: rotateX(0deg)
}

.bb-vertical .bb-flip-next-end {
	-webkit-transform: rotateY(-15deg);
	-moz-transform: rotateY(-15deg);
	transform: rotateY(-15deg)
}

.bb-vertical .bb-flip-prev-end {
	-webkit-transform: rotateY(-165deg);
	-moz-transform: rotateY(-165deg);
	transform: rotateY(-165deg)
}

.bb-horizontal .bb-flip-next-end {
	-webkit-transform: rotateX(15deg);
	-moz-transform: rotateX(15deg);
	transform: rotateX(15deg)
}

.bb-horizontal .bb-flip-prev-end {
	-webkit-transform: rotateX(165deg);
	-moz-transform: rotateX(165deg);
	transform: rotateX(165deg)
}

.bb-item {
	width: 100%;
	height: 100%;
	position: absolute;
	top: 0;
	left: 0;
	display: none;
	background: #fff
}

.no-js .bb-bookblock,
.no-js ul.bb-custom-grid li {
	width: auto;
	height: auto
}

.no-js .bb-item {
	display: block;
	position: relative
}