@charset "UTF-8";
/*
.right {
  margin-top: -7em;
}
*/
.img_incont {
  margin-bottom: 2em;
  width: 100%;
  height: auto;
}
.history__nav {
  background: var(--gradation-horizontal);
  padding: 1em 0;
  border-radius: 5px;
  position: sticky;
  top: 0;
  z-index: 5;
}
.history__nav a {
  color: var(--light-color);
}
.history__nav ul {
  display: flex;
  align-items: center;
  justify-content: space-evenly;
}
.history__nav ul li {
  text-align: center;
  flex: 1;
}
.history__nav ul li:not(:first-child) {
  border-left: 1px solid #ddd;
}
.history__list {
  margin-top: 3em;
  padding-left: 4em;
  position: relative;
}
.history__list::after {
  content: "";
  position: absolute;
  left: 14px;
  top: 0;
  width: 2px;
  height: 100%;
  background-color: #3366cc;
}
.year__group__wrap h2 {
  font-weight: 500;
  white-space: nowrap;
  margin-top: 2em;
  position: relative;
}
.year__group__wrap h2 span {
  font-size: 25px;
  margin-right: 5px;
  color: var(--link-color);
  line-height: 1;
  display: inline-block;
  vertical-align: -2px;
}
.year__group__wrap h2::after {
  content: "";
  position: absolute;
  left: -68px;
  top: 12px;
  display: block;
  width: 30px;
  height: 30px;
  background: var(--gradation-horizontal);
  border-radius: 50%;
  z-index: 3;
}
.year__group dl {
  margin-top: 1em;
  background-color: #eff4f9;
  padding: 1em;
  border-radius: 5px;
}
.year__group dt {
  font-size: 15px;
}
.year__group dt span {
  margin-right: 5px;
  display: inline-block;
  font-size: 19px;
  font-weight: normal;
  margin-top: 0;
  line-height: 1;
}
.year__group dd {
  padding-left: 1em;
  text-indent: -1em;
  line-height: 1.5;
  margin-top: .5em;
  position: relative;
  padding-top: 1em;
  border-top: 1px dotted #ccc;
}
.year__group dd::before {
  content: "・";
  font-weight: 500;
  color: #3366cc;
}

@media screen and (max-width: 1024px) {
  .right {
    width: 100%;
  }
  .year__group__wrap h2::after {
    top: 11px;
  }
}
@media screen and (max-width: 599px) {
  .history__nav {
    top: 80px;
  }
  .is-affixed + .right .history__nav {
    width: calc(100% + 14vw);
    margin-left: -7vw;
    border-radius: 0;
  }
  .history__nav ul {
    flex-wrap: wrap;
  }
  .history__nav ul li {
      width: 33.333%;
      flex: auto;
  }
  .history__nav ul li:nth-child(4) {
    border-left: none;
  }
  .history__list {
    padding-left: 2em;
  }
  .history__list::after {
    left: 5px;
  }
  .year__group__wrap h2::after {
    left: -36px;
    top: 15px;
    width: 20px;
    height: 20px;
  }
}