body {
  margin: auto;
  width: 100%;
}

.mainsec {
  background: url(../../development/img/mainvisual.jpg);
  background-size: cover;
  background-attachment: fixed;
  background-repeat: no-repeat;
  background-position: center top;
  height: auto;
  width: 100%;
  min-width: 950px;
  min-height: 551px;
  padding: 0px;
  margin: 0px;
  position: relative;
}
.mainsec.tabsp {
  background-attachment: inherit;
  background-size: cover;
}

.mainvisual h2 {
  width: 596px;
  margin: auto;
  padding: 92px 0 26px 3px;
}

.mainv_text {
  position: absolute;
  top: 50%;
  left: 50%;
  margin-left: -147px;
  margin-top: -100px;
}

#wrapper {
  width: 940px;
  margin: auto;
  clear: both;
}

.productsection {
  width: 940px;
  text-align: center;
  padding-top: 81px;
  padding-bottom: 100px;
  overflow: hidden;
}

.productionimg {
  width: 280px;
  float: left;
  margin-left: 49px;
}
.productionimg p {
  width: 280px;
  margin-top: 17px;
  line-height: 2.35;
  text-align: justify;
}
.productionimg:first-child {
  margin-left: 0;
}

#develop {
  padding-bottom: 58px;
}

#about {
  border-top: 1px solid #b4b4b4;
  padding-top: 82px;
  padding-bottom: 77px;
}
#about .productsection {
  padding-top: 52px;
}
#about h2 {
  text-align: center;
}
#about a {
  color: #000;
}

.backbtn {
  padding-bottom: 47px;
}

@media screen and (max-width: 1115px) {
/*
  .mainsec {
    background-attachment: inherit;
  }
*/
}
@media screen and (max-width: 575px) {
  .mainvisual {
    background: url(sp/img/develop/main-text-sp.jpg) no-repeat center;
    height: 100vh;
    width: 100%;
    min-width: auto;
    min-height: auto;
    background-size: cover;
  }
  .mainv_text {
    margin: 0;
    left: 20px;
    width: calc(100% - 20px);
    -webkit-transform: translate(0, -50%);
    transform: translate(0, -50%);
    color: #fff;
  }
  .mainv_text h1 {
    font-family: "Montserrat", sans-serif;
    font-size: 24px;
    letter-spacing: 1px;
    margin-bottom: 20px;
  }
  .mainv_text .h-catch {
    font-family: "Montserrat", sans-serif;
    font-size: 13px;
    letter-spacing: 0.1em;
    font-style: italic;
    line-height: 1.5;
    margin-bottom: 28px;
  }
  .mainv_text .j-title {
    font-size: 1.125rem;
    letter-spacing: 0.2em;
  }
  #wrapper {
    width: 100%;
  }
  #wrapper #develop.productsection {
    width: 100%;
  }
  #wrapper #develop.productsection .productionimg {
    float: none;
    width: calc(100% - 40px);
    margin: 0 20px;
  }
  #wrapper #develop.productsection .productionimg:not(:last-of-type) {
    margin-bottom: 72px;
  }
  #wrapper #develop.productsection .productionimg:last-of-type {
    border-bottom: 0.5px solid #a8a8a8;
    padding-bottom: 60px;
  }
  #wrapper #develop.productsection .productionimg h3 {
    font-family: "BIZ UDPGothic", sans-serif;
    font-size: 18px;
    letter-spacing: 0.2em;
    text-align: center;
    padding-top: 72px;
    margin-bottom: 36px;
    background: url(sp/img/common/logo-bk-sm.svg) no-repeat center top/36px;
  }
  #wrapper #develop.productsection .productionimg p {
    font-size: 0.875rem;
    width: 100%;
    line-height: 2;
    letter-spacing: 0.5px;
  }
  #wrapper #about {
    border-top: none;
    padding-top: 12px;
    padding-bottom: 0;
  }
  #wrapper #about h2 {
    font-family: "BIZ UDPGothic", sans-serif;
    font-size: 18px;
    letter-spacing: 0.2em;
  }
  #wrapper #about h2 span {
    font-family: "Montserrat", sans-serif;
    font-size: 12px;
    display: block;
    letter-spacing: 1px;
    margin-top: 8px;
  }
  #wrapper #about .productsection {
    width: 100%;
    padding-bottom: 60px;
  }
  #wrapper #about .productsection .productionimg {
    float: none;
    width: 100%;
    margin: 0;
  }
  #wrapper #about .productsection .productionimg:not(:last-of-type) {
    margin-bottom: 80px;
  }
  #wrapper #about .productsection .productionimg img {
    width: 100%;
  }
  #wrapper #about .productsection .productionimg h3 {
    font-family: "BIZ UDPGothic", sans-serif;
    font-size: 18px;
    letter-spacing: 0.2em;
    text-align: center;
    margin-bottom: 28px;
  }
  #wrapper #about .productsection .productionimg p {
    font-size: 0.875rem;
    width: calc(100% - 40px);
    line-height: 2;
    letter-spacing: 0.5px;
    padding: 0 20px;
    margin-top: 24px;
  }
}