.min-height-set {
  min-height: 64px;
}
@media screen and (max-width: 979px) {
  .min-height-set {
    min-height: auto;
  }
}

.history-box {
  opacity: 0;
  display: flex;
  gap: 62px;
  align-items: flex-end;
  margin-top: 96px;
  transition: opacity .4s ease;

  &.is-ready {
    opacity: 1;
  }

  > picture {
    max-width: 127px;
  }
}
@media screen and (max-width: 979px) {
  .history-box {
    gap: 13px;
    margin-top: 40px;

    > picture {
      max-width: 100%;
    }
  }
}

.history-list {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 16px;
  margin-top: 32px;
  line-height: 200%;

  dt {
    font-weight: bold;
  }
  &.w-84 {
    grid-template-columns: 84px 1fr;
  }
}


/* =========================================================
  年表矢印
========================================================= */
.arrow-box {
  display: flex;
  gap: 14px;
  height: 100%;

  li {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: end;
    min-width: 34px;
    font-size: 24px;
    font-weight: 700;
    color: var(--FS_text_bluegray, #395374);
    white-space: nowrap;

    span {
      position: relative;
      display: block;
      width: 4px;
      height: 50px;
      border-radius: 0 0 9999px 9999px;
      background: var(--FS_primary, #004399);

      &::before,
      &::after {
        content: "";
        position: absolute;
        bottom: 0;
        left: calc(50% - 2px);
        width: 4px;
        height: 16px;
        border-radius: 9999px;
        background: var(--FS_primary, #004399);
        transform-origin: 50% calc(100% - 2px);
      }
      &::before {
        transform: rotate(45deg);
      }
      &::after {
        transform: rotate(-45deg);
      }

      &.it,
      &.it::before,
      &.it::after  {
        background: var(--FS_accent_blue, #3CB6FF);
      }
      &.ai,
      &.ai::before,
      &.ai::after  {
        background: var(--FS_accent_pink, #EBA7F4);
      }
    }
  }
}
@media screen and (max-width: 979px) {
  .arrow-box {
    gap: 0;

    li {
      font-size: 2rem;
      min-width: 28px;

      span {
        width: 2px;
        margin: 0 5.7px;

        &::before,
        &::after {
          width: 2px;
          height: 10px;
          left: calc(50% - 1px);
          transform-origin: 50% calc(100% - 1px);
        }
      }
    }
    li + li {
      margin-left: -10px;
    }
  }
}