.bb-bookblock {
 height: 380px;
}
.bb-custom-wrapper nav {
 margin: 1em auto 0;
}
.bg{
 border-radius: 15px;
}
#r_frontcover{
 border-radius: 0px 15px 15px 0px;
}
.clickme{
  top:150px;
  left:750px;
  position: absolute;
}
.book {
  transition: opacity 0.1s 0.1s;
  top:0px;
  left:0px;
  position: absolute;
}
#a{
  background: url("../images/A/A_3_1.png");
}
#b{
  background: url("../images/A/A_3_2.png");
}
#c{
  background: url("../images/A/A_4_1.png");
}
#d{
  background: url("../images/A/A_4_2.png");
}
.bound .pages {
  width: 750px;
  height: 375px;
}
.bound .page {
  width: 375px;
  height: 375px;
}