.history-hero {
  height: 51.875rem;
  overflow: hidden;
}

.history-hero__bg-wrapper {
  align-items: center;
  background: url(../img/decor/hero_back.jpg) no-repeat center center/cover;
  display: flex;
  height: 51.875rem;
  justify-content: center;
  left: calc((100% - 100vw) / 2);
  position: absolute;
  width: 100vw;
}

.history-hero__bg-ribbon {
  display: flex;
  height: 64.84375vw;
  overflow: hidden;
  position: absolute;
  right: 0;
  top: 0;
  transition: width 1s;
  width: 0;
}

.history-hero__bg-ribbon picture {
  aspect-ratio: 1280/830;
  position: absolute;
  right: 0;
  top: 0;
  width: 100vw;
}

.history-hero__bg-ribbon picture source,
.history-hero__bg-ribbon picture img {
  width: 100%;
}

.history-hero__bg-ribbon.--scrolled {
  width: 100%;
}

.history-hero__bg-shape {
  position: absolute;
  right: 0;
  top: 0;
}

.history-hero__title {
  left: 5.125rem;
  position: absolute;
  top: 7.6875rem;
}

.history-hero__title h1 {
  color: #f62837;
  font-size: 4rem;
  font-weight: 700;
  opacity: 0;
  animation: fadeInFromLeft 0.8s 0s forwards;
}

.history-hero__title span {
  color: #f62837;
  display: block;
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.5;
  opacity: 0;
  animation: fadeInFromLeft 0.8s 0s forwards;
}

.history-hero__subtitle {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  left: 5.375rem;
  position: absolute;
  top: 15.4375rem;
}

.history-hero__subtitle .history-hero__subtitle-description {
  font-size: 1rem;
  font-weight: 400;
  line-height: 2.5;
  opacity: 0;
  animation: fadeInFromLeft 0.8s 0.5s forwards;
}

.history-content {
  margin-top: 2.1875rem;
}

.history-content__item {
  display: flex;
}

.history-content__item.--red {
  background: #fff0f0;
}

.history-content-item {
  display: flex;
  justify-content: space-between;
  position: relative;
}

.history-content-item + .history-content-item {
  padding-top: 3.75rem;
}

.history-content-item::before {
  background-color: #dbdbdb;
  content: "";
  height: 100%;
  left: 29.9375rem;
  position: absolute;
  top: 0;
  width: 0.125rem;
}

.history-content-item:nth-child(3) {
  margin-top: -3.375rem;
}

.history-content-item:nth-child(4) {
  margin-top: -2.875rem;
}

.history-content-item:nth-child(5) {
  margin-top: -0.75rem;
}

.history-content-item:nth-child(6) {
  margin-top: -3.5rem;
}

.history-content-item:nth-child(7) {
  margin-top: -4.8125rem;
}

.history-content-item:nth-child(9) {
  margin-top: -2rem;
}

.history-content-item:nth-child(12) {
  margin-top: -5.75rem;
}

.history-content-item:nth-child(14) {
  margin-top: -5.75rem;
}

.history-content-item:nth-child(16) {
  margin-top: -4.375rem;
}

.history-content-item:nth-child(17) {
  margin-top: -3.375rem;
}

.history-content-item:last-child {
  margin-top: -2.375rem;
  padding-bottom: 2.875rem;
}

.history-content-item:last-child .history-content-item__body-year {
  position: relative;
}

.history-content-item:last-child .history-content-item__body-year::after {
  background: url(../img/history/Q-Boad.png) no-repeat center center/contain;
  content: "";
  height: 9.1490384615rem;
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(0%);
  width: 13.75rem;
}

.history-content-item__image {
  border-radius: 2rem;
  height: 18rem;
  overflow: hidden;
  position: relative;
  width: 25rem;
}

.history-content-item__image img {
  height: 100%;
  width: auto;
  -o-object-fit: cover;
  object-fit: cover;
}

.history-content-item__image.--2004 img {
  height: auto;
  left: 0;
  position: absolute;
  top: -3.75rem;
  width: 100%;
  -o-object-fit: cover;
  object-fit: cover;
}

.history-content-item__image.--2013 {
  background: #ffffff;
}

.history-content-item__image.--2013 img {
  aspect-ratio: 152.199/125.061;
  height: auto;
  left: 50%;
  position: absolute;
  top: 47%;
  transform: translate(-50%, -50%);
  width: 11.25rem;
  -o-object-fit: cover;
  object-fit: cover;
}

.history-content-item__image.--2017 img {
  height: auto;
  left: 0;
  position: absolute;
  top: -6.5625rem;
  width: 100%;
  -o-object-fit: cover;
  object-fit: cover;
}

.history-content-item__body {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  padding-top: 1rem;
  width: 44.875rem;
}

.history-content-item__body-year {
  color: #f62837;
  font-size: 1.7rem;
  font-weight: 600;
  line-height: 1.2083333333;
  position: relative;
}
/*赤丸*/
.history-content-item__body-year::before {
  background-color: #f62837;
  border-radius: 0.5rem;
  content: "";
  height: 1rem;
  left: -3.1rem;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 1rem;
}

.history-content-item__body-title {
  font-size: 1.7rem;
  font-weight: 600;
  line-height: 1.1875;
}

.history-content-item__body-title.--red {
  color: #f62837;
}

.history-content-item__body-description {
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.875;
}

@media screen and (max-width: 769px) {
  .history-hero {
    height: 22.625rem;
    overflow: visible;
  }

  .history-hero__bg-wrapper {
    height: 100%;
  }

  .history-hero__bg-ribbon {
    height: 40rem;
  }

  .history-hero__bg-ribbon picture {
    aspect-ratio: 774/747;
    height: 22.625rem;
  }

  .history-hero__bg-shape {
    bottom: -5.625rem;
    left: 0;
    top: auto;
  }

  .history-hero__title {
    left: 1.25rem;
    text-align: left;
    top: 0.9375rem;
  }

  .history-hero__title h1 {
    font-size: 1.6875rem;
  }

  .history-hero__title span {
    font-size: 1rem;
    line-height: normal;
    margin-top: 0.625rem;
  }

  .history-hero__subtitle {
    align-items: flex-start;
    gap: 0.625rem;
    left: 1.25rem;
    right: 0;
    top: 5.9375rem;
  }

  .history-hero__subtitle .history-hero__subtitle-description {
    font-size: 0.75rem;
    line-height: 2;
    max-width: 18.75rem;
    text-align: left;
    width: 100%;
  }

  .history-content__item {
    flex-direction: column;
  }

  .history-content-item {
    flex-direction: column-reverse;
  }

  .history-content-item + .history-content-item {
    padding-bottom: 0.9375rem;
    padding-top: 0.9375rem;
  }

  .history-content-item::before {
    background-color: #dbdbdb;
    height: 100%;
    left: 1.25rem;
    width: 0.125rem;
  }

  .history-content-item:nth-child(n) {
    margin-top: 0;
  }

  .history-content-item:last-child {
    padding-bottom: 1.875rem;
  }

  .history-content-item:last-child .history-content-item__body-year {
    position: relative;
  }

  .history-content-item:last-child .history-content-item__body-year::after {
    background: url(../img/history/Q-Boad.png) no-repeat center center/contain;
    height: 3.3269230769rem;
    width: 5rem;
  }

  .history-content-item__image.--2004 img {
    top: -2.1875rem;
  }

  .history-content-item__image {
    aspect-ratio: 400/288;
    border-radius: 1rem;
    height: auto;
    margin-top: 1rem;
    width: 100%;
  }

  .history-content-item__image.--2017 img {
    top: -5.0625rem;
  }

  .history-content-item__body {
    width: 100%;
  }

  .history-content-item__body-year {
    font-size: 1rem;
    line-height: 1.1875;
  }

  .history-content-item__body-year::before {
    height: 0.8rem;
    left: -1.6rem;
    width: 0.8rem;
  }

  .history-content-item__body-title {
    font-size: 1rem;
    line-height: 1.2;
  }

  .history-content-item__body-description {
    font-size: 0.875rem;
    line-height: 1.5714285714;
  }
}