#content {
  position: relative;
  padding: 92px 0 74px;
  background: url("../img/bg_bottom.png") repeat-x bottom left, url("../img/bg_con.png") no-repeat top center;
  background-size: auto, 100%;
}
@media only screen and (max-width: 768px) {
  #content {
    padding: 7.03125vw 0 17.8125vw;
    background: url("../img/bg_bottom-sp.png") repeat-x bottom left, url("../img/bg_con-sp.png") no-repeat top center;
    background-size: auto, 100%;
  }
}
@media only screen and (max-width: 768px) {
  #content img {
    width: 100%;
  }
}
#content .bg {
  width: 100vw;
  height: 100vh;
  position: fixed;
  top: 0;
  left: 0;
  background: url("../img/bg_con_rp.jpg") no-repeat top center;
  background-size: cover;
  z-index: -1;
}
@media only screen and (max-width: 768px) {
  #content .bg {
    background: url("../img/bg_con_rp-sp.jpg") no-repeat top center;
    background-size: cover;
  }
}
#content .inner {
  width: 1000px;
  margin: 0 auto;
}
@media only screen and (max-width: 768px) {
  #content .inner {
    width: auto;
  }
}
#content .btn-next {
  position: relative;
  text-align: right;
}
@media only screen and (max-width: 768px) {
  #content .btn-next {
    width: 33.75vw;
    margin-left: 61.71875vw;
  }
}

#books h2 {
  position: relative;
  margin-bottom: 52px;
}
@media only screen and (max-width: 768px) {
  #books h2 {
    margin-bottom: 7.03125vw;
  }
}
#books .con {
  position: relative;
  padding-bottom: 50px;
  text-align: center;
  margin-bottom: 30px;
}
@media only screen and (max-width: 768px) {
  #books .con {
    padding-bottom: 6.25vw;
  }
}
#books .con::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 28px;
  background: url("../img/frame-pc.png") no-repeat top center;
  background-size: contain;
}
@media only screen and (max-width: 768px) {
  #books .con::after {
    height: 6.25vw;
    margin: 0 auto;
    background: url("../img/frame-sp.png") no-repeat top center;
    background-size: contain;
  }
}
#books .con .block {
  padding-bottom: 52px;
}
@media only screen and (max-width: 768px) {
  #books .con .block {
    width: 90.625vw;
    margin: 0 auto;
    padding-bottom: 11.5625vw;
  }
}
#books .con .block:not(:last-of-type) {
  border-bottom: 1px solid #1a1621;
  margin-bottom: 50px;
}
@media only screen and (max-width: 768px) {
  #books .con .block:not(:last-of-type) {
    margin-bottom: 10.9375vw;
  }
}
#books .con .block h3 {
  margin-bottom: 34px;
}
@media only screen and (max-width: 768px) {
  #books .con .block h3 {
    margin-bottom: 8.125vw;
  }
}
#books .con .block .book:not(:last-of-type) {
  border-bottom: 1px dotted #1a1621;
  padding-bottom: 52px;
  margin-bottom: 52px;
}
@media only screen and (max-width: 768px) {
  #books .con .block .book:not(:last-of-type) {
    margin-bottom: 8.125vw;
    padding-bottom: 9.375vw;
  }
}
#books .con .block .wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
}
@media only screen and (max-width: 768px) {
  #books .con .block .wrap {
    width: auto;
    display: block;
  }
}
#books .con .block .wrap .cover {
  margin: 0 52px 0 190px;
}
@media only screen and (max-width: 768px) {
  #books .con .block .wrap .cover {
    width: 65.9375vw;
    margin: 0 auto 4.6875vw;
  }
}
#books .con .block .wrap .detail {
  width: 476px;
  text-align: left;
}
@media only screen and (max-width: 768px) {
  #books .con .block .wrap .detail {
    width: auto;
    text-align: center;
  }
}
#books .con .block .wrap .detail h4 {
  font-size: 24px;
  line-height: 1.3;
  margin: -10px 0 15px;
}
@media only screen and (max-width: 768px) {
  #books .con .block .wrap .detail h4 {
    font-size: 36px;
    font-size: 5.625vw;
    margin: 0 0 3.125vw;
  }
}
#books .con .block .wrap .detail h4 span {
  display: block;
  font-size: 20px;
}
@media only screen and (max-width: 768px) {
  #books .con .block .wrap .detail h4 span {
    font-size: 30px;
    font-size: 4.6875vw;
  }
}
#books .con .block .wrap .detail h4 span.normal {
  font-weight: normal;
}
#books .con .block .wrap .detail p.info {
  font-size: 16px;
  margin-bottom: 20px;
}
@media only screen and (max-width: 768px) {
  #books .con .block .wrap .detail p.info {
    font-size: 20px;
    font-size: 3.125vw;
    margin: 0 0 4.6875vw;
  }
}
@media only screen and (max-width: 768px) {
  #books .con .block .wrap .detail .btns {
    width: 63.4375vw;
    margin: 0 auto;
  }
}
#books .con .block .wrap .detail .btns ul li:not(:last-child) {
  margin-bottom: 14px;
}
@media only screen and (max-width: 768px) {
  #books .con .block .wrap .detail .btns ul li:not(:last-child) {
    margin-bottom: 3.125vw;
  }
}
#books .con .block .wrap .detail .btns ul li.off {
  opacity: 0.5;
}