@media screen and (min-width: 751px) {
  .kv .kv_bg {
    background-image: url(../img/about/kv_pc.jpg);
  }
}
@media screen and (max-width: 750px) {
  .kv .kv_bg {
    background-image: url(../img/about/kv_sp.jpg);
  }
}

@media screen and (min-width: 751px) {
  .kv + .container {
    margin: 2rem auto 14rem;
  }
}
@media screen and (max-width: 750px) {
  .kv + .container {
    margin: 8rem auto 12rem;
  }
}

.sub_nav {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
}
.sub_nav > li {
  display: block;
  font-weight: 400;
  font-family: "EB Garamond", serif;
}
@media screen and (min-width: 751px) {
  .sub_nav > li {
    font-size: 1.8rem;
  }
}
@media screen and (max-width: 750px) {
  .sub_nav > li {
    font-size: 2.8rem;
  }
}
.sub_nav > li + li::before {
  content: "|";
  display: inline-block;
}
@media screen and (min-width: 751px) {
  .sub_nav > li + li::before {
    margin: 0 5.5rem;
  }
}
@media screen and (max-width: 750px) {
  .sub_nav > li + li::before {
    margin: 0 8rem;
  }
}
.sub_nav .current {
  color: #7B7A7B;
  pointer-events: none;
}

@media screen and (min-width: 751px) {
  .about {
    margin: 13rem auto 14rem;
  }
}
@media screen and (max-width: 750px) {
  .about {
    margin: 11rem auto 12.5rem;
  }
}
.about .about_item {
  text-align: center;
}
@media screen and (min-width: 751px) {
  .about .about_item {
    margin-top: 9rem;
  }
}
@media screen and (max-width: 750px) {
  .about .about_item {
    margin-top: 7rem;
  }
}
.about .about_item > h4 {
  font-weight: 400;
  font-family: "Zen Old Mincho", serif;
}
@media screen and (min-width: 751px) {
  .about .about_item > h4 {
    font-size: 2.7rem;
  }
}
@media screen and (max-width: 750px) {
  .about .about_item > h4 {
    font-size: 3.8rem;
  }
}
@media screen and (min-width: 751px) {
  .about .about_item > p {
    margin: 3.5rem 0 4.5rem;
    font-size: 1.6rem;
    line-height: 3.2rem;
  }
}
@media screen and (max-width: 750px) {
  .about .about_item > p {
    margin: 4.5rem 0 6.5rem;
    text-align: left;
    font-size: 2.5rem;
    line-height: 4rem;
  }
}
.about .about_item .box_btn {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
}
@media screen and (min-width: 751px) {
  .about .about_item .box_btn {
    margin-bottom: 10rem;
  }
}
@media screen and (max-width: 750px) {
  .about .about_item .box_btn {
    margin-bottom: 10rem;
  }
}
@media screen and (min-width: 751px) {
  .about .about_item .row {
    width: 45rem;
    -webkit-box-pack: justify;
        -ms-flex-pack: justify;
            justify-content: space-between;
    margin: 0 auto 10rem;
  }
}
@media screen and (min-width: 751px) {
  .about .about_item + .about_item {
    margin-top: 13rem;
  }
}
@media screen and (max-width: 750px) {
  .about .about_item + .about_item {
    margin-top: 12rem;
  }
}