.frame {
    /* position: absolute; */
    /* left: 50%; */
    /* margin-left: 0; */
    /* top: 50%; */
    /* margin-top: -150px; */
    /* border-top: 25px solid #784320; */
    /* border-right: 25px solid #6a3919; */
    /* border-bottom: 25px solid #945a33; */
    /* border-left: 25px solid #8f4b1e; */
    width: 100%;
    height: 100%;
    margin: 0 auto;
}

.book-in {
    display: block;
    float: left;
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    /* background: #333; */
    -webkit-transform: translate3d(0, 0, 0);
    transform: translate3d(0, 0, 0);
}

.book-in ul {
    display: block;
    position: relative;
    width: 100%;
    height: 100%;
    margin: 0px;
    padding: 0;
    background: transparent !important;
    list-style: none;
    -webkit-perspective-origin: 0 50% 0;
    perspective-origin: 0 50% 0;
    -webkit-perspective: 800px;
    perspective: 800px;
    -webkit-transform: translate3d(0, 0, 0);
}
.book-in ul > li {
    display: block;
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    padding: 0;
    margin: 0;
    background-color: #FFFFFF;
    border: 1px solid #C8C8C8;
    filter:progid:DXImageTransform.Microsoft.gradient(gradientType=1, startColorstr='#FF000000', endColorstr='#FFEDEDED');
    background-image: -webkit-linear-gradient(left, #000000 0%, #ededed90%, #ededed 100%);
    background-image: linear-gradient(to right, #000000 0%, #ededed 90%, #ededed100%);
    -webkit-transform-origin: 0 50% 0;
    -ms-transform-origin: 0 50% 0;
    transform-origin: 0 50% 0;
    -webkit-transform-style: preserve-3d;
    transform-style: preserve-3d;
    -webkit-transition: all 0.5s cubic-bezier(0.25, 1, 0.25, 1);
    transition: all 0.5s cubic-bezier(0.25, 1, 0.25, 1);
    -webkit-border-radius: 8px;
    -moz-border-radius: 8px;
    border-radius: 8px;
}

.cover {
    z-index: 2 !important;
    display: block;
    width: 100%;
    height: 100%;
    background: #333 !important;
    -webkit-transform: rotateY(0deg) translateZ(0px);
    transform: rotateY(0deg) translateZ(0px);
}

.page1 {
    display: none;
    -webkit-transform: rotateY(20deg) translateZ(-1px);
    transform: rotateY(20deg) translateZ(-1px);
}

.page2 {
    display: none;
    -webkit-transform: rotateY(30deg) translateZ(-2px);
    transform: rotateY(30deg) translateZ(-2px);
}

.page3 {
    display: none;
    -webkit-transform: rotateY(40deg) translateZ(-3px);
    transform: rotateY(40deg) translateZ(-3px);
}

.page4 {
    display: none;
    -webkit-transform: rotateY(0deg) translateZ(-3px);
    transform: rotateY(0deg) translateZ(-3px);
}

.book-in:hover .page1 {
    -webkit-transform: rotateY(-34deg);
    transform: rotateY(-34deg);
}

.book-in:hover .page2 {
    -webkit-transform: rotateY(-27deg);
    transform: rotateY(-27deg);
}

.book-in:hover .page3 {
    -webkit-transform: rotateY(-20deg);
    transform: rotateY(-20deg);
}

.book-in:hover .page4 {
    -webkit-transform: rotateY(0deg);
    transform: rotateY(0deg);
}

.book-in:hover .cover {
    -webkit-transform: rotateY(-40deg);
    transform: rotateY(-40deg);
}