.hero_txt {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 25px;
}
.sche {
  text-align: center;
  margin: 0 auto;
}
.sche img {
  width: 90%;
  max-width: 1080px;
}

.line {
  text-align: center;
  margin: 0 auto;
}
.line img {
  max-height: 600px;
  max-width: 100%;
}
.flu {
  text-align: center;
  margin: 0 auto;
}
.flu img {
  width: 90%;
  max-width: 500px;
}
.main {
  width: 90%;
  max-width: 1080px;
  text-align: center;
  margin: 0 auto;
  text-align: left;
}
.main dt {
  padding-top: 12px;
}
.main dd {
  padding: 12px 0;
}

#naika,
#geka,
#syoukaki {
  scroll-margin-top: 100px;
}