.page-history-gallery {
  width: calc(100% + var(--page-history-gallery-pr));
  overflow: hidden;
  border-radius: 4px;
  --page-history-gallery-pr: var(--l-inner-padding-pc);
}
@media (max-width: 1024px) {
  .page-history-gallery {
    --page-history-gallery-pr: calc(var(--l-inner-padding-sp-ratio) * var(--viewport-client-width, 100%));
  }
}

.page-history-gallery__slide .splide__slide {
  aspect-ratio: 336/194;
  overflow: hidden;
  border-radius: 4px;
}
@media (min-width: 1025px) {
  .page-history-gallery__slide .splide__slide {
    width: 28.8164665523%;
  }
}
@media (max-width: 1024px) {
  .page-history-gallery__slide .splide__slide {
    width: 73.2394366197%;
  }
}
.page-history-gallery__slide .splide__slide img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

@media (min-width: 1025px) {
  .page-history-intro {
    display: grid;
    grid-template-columns: repeat(20, 1fr);
    margin-top: 8rem;
  }
}
@media (max-width: 1024px) {
  .page-history-intro {
    margin-top: 6rem;
  }
}

@media (min-width: 1025px) {
  .page-history-intro__block:nth-child(1) {
    grid-column: 1/8;
  }
}
@media (min-width: 1025px) {
  .page-history-intro__block:nth-child(2) {
    grid-column: 9/20;
  }
}
@media (max-width: 1024px) {
  .page-history-intro__block:nth-child(2) {
    margin-top: 4.8rem;
  }
}

@media (min-width: 1025px) {
  .page-history__section {
    margin-top: 16rem;
  }
}
@media (max-width: 1024px) {
  .page-history__section {
    margin-top: 6rem;
  }
}

.page-history__timeline {
  position: relative;
}

.page-history__timeline::before {
  position: absolute;
  top: 0;
  display: block;
  width: 1px;
  height: 100%;
  content: "";
  background-image: repeating-linear-gradient(to bottom, #96d8f2 0 3px, transparent 3px 6px);
  transform: translateX(-50%);
}
@media (min-width: 1025px) {
  .page-history__timeline::before {
    left: 20%;
  }
}
@media (max-width: 1024px) {
  .page-history__timeline::before {
    left: 25%;
  }
}

@media (min-width: 1025px) {
  .page-history__timeline__item + .page-history__timeline__item {
    margin-top: 6.4rem;
  }
}
@media (max-width: 1024px) {
  .page-history__timeline__item + .page-history__timeline__item {
    margin-top: 4rem;
  }
}

.page-history__year-block {
  align-items: flex-start;
}

.page-history__year {
  position: relative;
  display: inline-block;
  color: var(--color-primary);
  letter-spacing: 0.05em;
  --lh: 1.4;
  line-height: 1.4;
  padding-top: 0.1px;
  padding-bottom: 0.1px;
}
.page-history__year::before, .page-history__year::after {
  display: block;
  height: 0;
  content: "";
}
.page-history__year::before {
  margin-top: calc((1 - var(--lh, 1)) * .5em * 1);
}
.page-history__year::after {
  margin-bottom: calc((1 - var(--lh, 1)) * .5em * 1);
}
@media (min-width: 1025px) {
  .page-history__year {
    grid-column: 1/5;
    margin-top: 1.5rem;
    font-size: 2.4rem;
  }
}
@media (max-width: 1024px) {
  .page-history__year {
    grid-column: 1/4;
    margin-top: 1.8rem;
    font-size: 1.6rem;
  }
}
.page-history__year::after {
  position: absolute;
  top: 50%;
  right: 0;
  display: block;
  content: "";
  background-color: var(--color-secondary);
  border-radius: 0.2rem;
  transform: translateY(-50%) translateX(50%);
}
@media (min-width: 1025px) {
  .page-history__year::after {
    width: 0.7rem;
    height: 0.7rem;
  }
}
@media (max-width: 1024px) {
  .page-history__year::after {
    width: 0.5rem;
    height: 0.5rem;
  }
}

@media (min-width: 1025px) {
  .page-history__events {
    grid-column: 6/-1;
  }
}
@media (max-width: 1024px) {
  .page-history__events {
    grid-column: 5/-1;
  }
}

.page-history__event-list {
  padding: 0;
  margin: 0;
  border-top: 1px solid var(--color-primary);
  border-radius: 0.8rem 0.8rem 0 0;
}

.page-history__event {
  align-items: flex-start;
  border-bottom: 1px solid var(--color-border-gray);
}
@media (min-width: 1025px) {
  .page-history__event {
    padding: 2.1rem 0;
    display: grid;
    grid-template-columns: repeat(15, 1fr);
  }
}
@media (max-width: 1024px) {
  .page-history__event {
    padding: 1.7rem 0;
    display: grid;
    grid-template-columns: repeat(8, 1fr);
  }
}

.page-history__month {
  color: var(--color-secondary);
  --lh: 1.6;
  line-height: 1.6;
  padding-top: 0.1px;
  padding-bottom: 0.1px;
  letter-spacing: 0.04em;
}
.page-history__month::before, .page-history__month::after {
  display: block;
  height: 0;
  content: "";
}
.page-history__month::before {
  margin-top: calc((1 - var(--lh, 1)) * .5em * 1);
}
.page-history__month::after {
  margin-bottom: calc((1 - var(--lh, 1)) * .5em * 1);
}
@media (min-width: 1025px) {
  .page-history__month {
    grid-column: 1/4;
    font-size: 1.6rem;
  }
}
@media (max-width: 1024px) {
  .page-history__month {
    grid-column: 1/3;
    font-size: 1.4rem;
  }
}

.page-history__desc {
  color: var(--color-txt-gray);
  --lh: 1.6;
  line-height: 1.6;
  padding-top: 0.1px;
  padding-bottom: 0.1px;
  letter-spacing: 0.04em;
}
.page-history__desc::before, .page-history__desc::after {
  display: block;
  height: 0;
  content: "";
}
.page-history__desc::before {
  margin-top: calc((1 - var(--lh, 1)) * .5em * 1);
}
.page-history__desc::after {
  margin-bottom: calc((1 - var(--lh, 1)) * .5em * 1);
}
@media (min-width: 1025px) {
  .page-history__desc {
    grid-column: 4/-1;
    font-size: 1.6rem;
  }
}
@media (max-width: 1024px) {
  .page-history__desc {
    grid-column: 3/-1;
    font-size: 1.4rem;
  }
}