* {
  margin: 0;
  padding: 0;
}
body {
  background-color: #fff;
  color: #555;
  font-family: "Palatino Linotype", "Book Antiqua", Palatino, serif;
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  -moz-font-smoothing: antialiased;
}
.wrap {
  width: 100%;
  height: 600px;
  position: absolute;
  top: 50%;
  margin-top: -300px;
  background-color: #333;
  overflow: hidden;

  -webkit-perspective: 800px;
  -moz-perspective: 800px;
}
.photo {
  width: 260px;
  height: 320px;
  position: absolute;
  z-index: 1;
  box-shadow: 0 0 1px rgba(0,0,0,.01);

  -webkit-transition: all 0.6s;
  -moz-transition: all 0.6s;

  left: 50%;
  top: 50%;
  margin: -160px 0 0 -130px;
}
.photo .side {
  width: 100%;
  height: 100%;
  background-color: #eee;
  position: absolute;
  top: 0;
  right: 0;
  padding: 20px;
  box-sizing: border-box;
}
.photo .side-front {
  /*display: none;*/
}
.photo .side-front .image{
  width: 100%;
  height: 250px;
  line-height: 250px;
  overflow: hidden;
}
.photo .side-front .image img{
  width: 100%;
}
.photo .side-front .caption{
  text-align: center;
  font-size: 16px;
  line-height: 50px;
}
.photo .side-back {
  
}
.photo .side-back .desc{
  text-align: center;
  color: #666;
  font-size: 14px;
  line-height: 1.5em;
}
.photo_center {
  left: 50%;
  top: 50%;
  margin: -160px 0 0 -130px;
  z-index: 999;
}
.photo-wrap {
  position: absolute;
  width: 100%;
  height: 100%;

  -webkit-transform-style: preserve-3d;
  -webkit-transition: all 0.6s;

  -moz-transform-style: preserve-3d;
  -moz-transition: all 0.6s;
}
.photo-wrap .side-front {
  -webkit-transform: rotateY(0deg);
  -moz-transform: rotateY(0deg);
}
.photo-wrap .side-back {
  -webkit-transform: rotateY(180deg);
  -moz-transform: rotateY(180deg);
}
.photo-wrap .side {
  -webkit-backface-visibility: hidden;
  -moz-backface-visibility: hidden;
}
.photo_front .photo-wrap {
  -webkit-transform: rotateY(0deg);
  -moz-transform: rotateY(0deg);
}
.photo_back .photo-wrap {
  -webkit-transform: rotateY(180deg);
  -moz-transform: rotateY(180deg);
}
.nav {
  width: 80%;
  height: 30px;
  line-height: 30px;
  position: absolute;
  left: 10%;
  bottom: 20px;
  z-index: 999;
  text-align: center;
}
.nav .i{
  width: 30px;
  height: 30px;
  display: inline-block;
  cursor: pointer;
  background-color: #aaa;
  text-align: center;
  border-radius: 90%;

  -webkit-transform: scale(0.5);
  -webkit-transition: all 0.5s;

  -moz-transform: scale(0.5);
  -moz-transition: all 0.5s;
}
.nav .i_current {
  -webkit-transform: scale(0.8);
  -moz-transform: scale(0.8);
}
.nav .i_back {
  -webkit-transform: rotateY(-180deg) scale(0.8);
  -moz-transform: rotateY(-180deg) scale(0.8);
  background-color: #555;
}