html,body{
  height: 100%;
}
body,div,h1,p,a{margin:0;padding:0;}
body{background-color: #ffffff;}
a{
  text-decoration: none;
}
.wraper{
  width: 100%;
  min-height: 100%;
  position: relative;
  overflow: hidden;
  background: url(../img/dn_top_bg.png) no-repeat center top;
  background-size: 100% 138px;
}
.book_info{
  height: 102px;
  padding:44px 0 0 14px;
}
.book_name{
  padding: 12px 20px 0 89px;
  font-size: 18px;
  color: #fff;
}
.book_img{
  position: absolute;
  top: 44px;
  left: 20px;
  z-index: 2;
  width: 73px;
  height: 102px;
}
.book_img img{
  border-radius: 6px;
  width: 100%;
}
.yy_icon{
  position: absolute;
  top: -6px;
  left: -6px;
  width: 24px;
  height: 24px;
  border-radius: 6px;
  background: url(../img/dn_bk_logo.png?ts=1) no-repeat;
  background-size: 24px 24px;
}
.font_box{
  padding: 30px 18px 0;
}
.font_box h3{
  margin: 0;
  text-align: center;
  font-size: 18px;
  color:#222;
  font-weight: 500;
}
.font_box p{
  padding: 25px 0 7px;
  line-height: 30px;
  font-size: 16px;
  color: #414141;
}
.btm{
  padding:76px 0 42px;
  text-align: center;
}
.logo{
  width: 82px;
  height: 71px;
  margin: 0 auto;
  background: url(../img/dn_btn_logo.png?ts=1) no-repeat;
  background-size: 82px 71px;
}
.font{
  font-size: 10px;
  color:#898989;
  padding-top: 8px;
}
.btn{
  display: block;
  margin: 20px 16px 0;
  height: 46px;
  line-height: 46px;
  border-radius: 23px;
  background: #FFD23C;
  color:#222;
  font-size: 16px;
}
.btm span{
  position: relative;
  padding-right: 16px;
  background: url(../img/more_bk.png) no-repeat right center;
  background-size: 8px 12px;
}
.fixed_btn{
  display: block;
  position: fixed;
  left: 50%;
  bottom: 42px;
  padding: 0 28px;
  height: 32px;
  transform: translateX(-50%);
  text-align: center;
  line-height: 32px;
  border-radius: 17px;
  background: #FFD23C;
}
.fixed_btn span{
  font-size: 16px;
  color: #222;
  padding-right: 16px;
  background: url(../img/more_bk.png) no-repeat right center;
  background-size: 8px 12px;
}
.popup{
  display: none;
  position: fixed;
  bottom: 10%;
  left: 50%;
  width: 80%;
  height: 50px;
  padding: 20px;
  transform: translateX(-50%);
  background: #fff;
  border-radius: 10px;
  text-align: left;
  box-shadow: 0 0 10px 0 rgba(0,0,0,0.2);
}
.popup .text_btn{
  position: absolute;
  right:20px;
  bottom: 20px;
  margin: 20px 0 0;
  color: #000;
  font-size: 14px;
}
.text_btn2{
  position: absolute;
  right:60px;
  bottom: 20px;
  margin: 20px 0 0;
  color: #000;
  font-size: 14px;
}