.ch-item {
    width: 100%;
    height: 100%;
    position: relative;
    cursor: default;
}

.ch-info-wrap{
    position: absolute;
    -webkit-perspective: 800px;
    -moz-perspective: 800px;
    -o-perspective: 800px;
    -ms-perspective: 800px;
    perspective: 800px;

    width:100%;
    height:100%;
    -webkit-transition: all 0.4s ease-in-out;
    -moz-transition: all 0.4s ease-in-out;
    -o-transition: all 0.4s ease-in-out;
    -ms-transition: all 0.4s ease-in-out;
    transition: all 0.4s ease-in-out;

}

.ch-info{
    position: absolute;
    width: 100%;
    height: 100%;

    -webkit-transition: all 0.4s ease-in-out;
    -moz-transition: all 0.4s ease-in-out;
    -o-transition: all 0.4s ease-in-out;
    -ms-transition: all 0.4s ease-in-out;
    transition: all 0.4s ease-in-out;

    -webkit-transform-style: preserve-3d;
    -moz-transform-style: preserve-3d;
    -o-transform-style: preserve-3d;
    -ms-transform-style: preserve-3d;
    transform-style: preserve-3d;

}

.ch-info > div {
    display: block;
    position: absolute;
    width: 100%;
    height: 100%;
    background-position: center center;

    -webkit-backface-visibility: hidden;
    -moz-backface-visibility: hidden;
    -o-backface-visibility: hidden;
    -ms-backface-visibility: hidden;
    backface-visibility: hidden;
}

.ch-info .ch-info-back {
    -webkit-transform: rotate3d(0,1,0,180deg);
    -moz-transform: rotate3d(0,1,0,180deg);
    -o-transform: rotate3d(0,1,0,180deg);
    -ms-transform: rotate3d(0,1,0,180deg);
    transform: rotate3d(0,1,0,180deg);

    background: #000;
}
.ch-info .ch-info-back img{
    width:100%;
}


.ch-item:hover .ch-info-wrap {
    box-shadow:
        0 0 0 0 rgba(255,255,255,0.8),
        inset 0 0 3px rgba(115,114, 23, 0.8);
}

.ch-item:hover .ch-info {
    -webkit-transform: rotate3d(0,1,0,-180deg);
    -moz-transform: rotate3d(0,1,0,-180deg);
    -o-transform: rotate3d(0,1,0,-180deg);
    -ms-transform: rotate3d(0,1,0,-180deg);
    transform: rotate3d(0,1,0,-180deg);
}