.book_ch-item {
	width: 100%;
	height: 100%;
	position: relative;
	cursor: default;
	-webkit-perspective: 900px;
	-moz-perspective: 900px;
	-o-perspective: 900px;
	-ms-perspective: 900px;
	perspective: 900px;
}
.book_ch-info{
	position: absolute;
	width: 100%;
	height: 100%;
	-webkit-transform-style: preserve-3d;
	-moz-transform-style: preserve-3d;
	-o-transform-style: preserve-3d;
	-ms-transform-style: preserve-3d;
	transform-style: preserve-3d;
}
.book_ch-info > div {
	display: block;
	position: absolute;
	width: 100%;
	height: 100%;
	background-position: center center;
	-webkit-transition: all 0.4s linear;
	-moz-transition: all 0.4s linear;
	-o-transition: all 0.4s linear;
	-ms-transition: all 0.4s linear;
	transition: all 0.4s linear;
	-webkit-transform-origin: 50% 0%;
	-moz-transform-origin: 50% 0%;
	-o-transform-origin: 50% 0%;
	-ms-transform-origin: 50% 0%;
	transform-origin: 50% 0%;
}

.book_ch-info .book_ch-info-front {s
}

.book_ch-info .book_ch-info-back {
	-webkit-transform: translate3d(0,0,-220px) rotate3d(1,0,0,90deg);
	-moz-transform: translate3d(0,0,-220px) rotate3d(1,0,0,90deg);
	-o-transform: translate3d(0,0,-220px) rotate3d(1,0,0,90deg);
	-ms-transform: translate3d(0,0,-220px) rotate3d(1,0,0,90deg);
	transform: translate3d(0,0,-220px) rotate3d(1,0,0,90deg);
	opacity: 0;
}

.book_ch-img-3 { 
	background-image: url('../../assets/images/img1.png?new2');
}

.book_ch-item:hover .book_ch-info-front {
	-webkit-transform: translate3d(0,280px,0) rotate3d(1,0,0,-90deg);
	-moz-transform: translate3d(0,280px,0) rotate3d(1,0,0,-90deg);
	-o-transform: translate3d(0,280px,0) rotate3d(1,0,0,-90deg);
	-ms-transform: translate3d(0,280px,0) rotate3d(1,0,0,-90deg);
	transform: translate3d(0,280px,0) rotate3d(1,0,0,-90deg);
	opacity: 0;
}

.book_ch-item:hover .book_ch-info-back {
	-webkit-transform: rotate3d(1,0,0,0deg);
	-moz-transform: rotate3d(1,0,0,0deg);
	-o-transform: rotate3d(1,0,0,0deg);
	-ms-transform: rotate3d(1,0,0,0deg);
	transform: rotate3d(1,0,0,0deg);
	opacity: 1;
}

.book_ch-grid {
	padding: 0;
	list-style: none;
	display: block;
float:left;
	width: 100%;
}

.book_ch-grid:after,
.book_ch-item:before {
	content: '';
    display: table;
}

.book_ch-grid:after {
	clear: both;
}

.book_ch-grid li {
	width: 377px;
	height: 359px;
	display: inline-block;
}