main section {
  padding: 60px 0;
  overflow: hidden;
}
main section:nth-child(odd) {
  background-image:
    url('../img/sub/sub-bg.png'),
    url('../img/sub/sub-bg.png'),
    linear-gradient(45deg, rgba(7, 162, 233, 1) 0%, rgba(7, 159, 232, 0.3) 100%);
  background-repeat: no-repeat, no-repeat, no-repeat;
  background-size: 568px auto, 568px auto, cover;
  background-position: calc(100% + 250px) 10%, -150px 80%, center;
}
main section:nth-child(even) {
  background-image:
    url('../img/sub/sub-bg.png'),
    url('../img/sub/sub-bg.png'),
    linear-gradient(135deg, rgba(7, 162, 233, 1) 0%, rgba(0, 159, 232, 0.3) 100%);
  background-repeat: no-repeat, no-repeat, no-repeat;
  background-size: 568px auto, 568px auto, cover;
  background-position: calc(100% + 250px) 20%, -150px 90%, center;
}
main .content {
  padding: 60px;
  background: #fff;
}
main .content h3 {
  margin: 60px 0 30px;
  padding-bottom: 15px;
  color: #004db5;
  font-size: 2.4rem;
  text-align: center;
  border-bottom: 1px solid #231815;
}
main .content h4 {
  padding-bottom: 5px;
  color: #004db5;
  font-size: 1.8rem;
}
@media screen and (max-width: 1130px) {
  main section:nth-child(even),
  main section:nth-child(odd) {
    padding: 60px 15px;
  }
  main .content {
    padding: 60px 15px;
  }
}


/*==== 説明リスト ====*/
.content dl {
  display: flex;
  border-bottom: 1px solid #231815;
}
.content dd,
.content dt {
  padding: 15px;
  font-size: 1.5rem;
}
.content dt {
  padding-left: 30px;
  width: 180px;
  font-weight: bold;
}
.content dd {
  padding-right: 30px;
  flex: 1;
}
@media screen and (max-width: 1080px) {
  .content dt {
    padding-left: 15px;
    width: 130px;
  }
  .content dd {
    padding-right: 15px;
  }
}