.runfeng-development-history {
  padding: calc(var(--content-gap) / 2) 0 var(--content-gap);
}

.runfeng-development-history-title {
  text-align: center;
  font-size: var(--title-size-h1);
  line-height: 1.52;
  
}

.runfeng-development-history-content {
  display: flex;
  gap: 70px;
  margin-top: calc(var(--text-gap-lg) * 2);
  padding-bottom: calc(var(--content-gap-md) + 3px);
  position: relative;
}

.runfeng-development-history-content .left-picture {
  width: calc(390 / 1440 * 100%);
  flex-shrink: 0;
}
.left-picture img{
  height: 100%;
}
.runfeng-development-history-content .right-box {
  width: calc(980 / 1440 * 100%);
}

.runfeng-development-history-content .history-item {
  display: flex;
  gap: 80px;
  padding: 40px 0;
  border-bottom: 2px solid rgba(129, 151, 171, 0.10);
  background: rgba(255, 255, 255, 0.00);
  transition: all 0.3s ease;
}

.runfeng-development-history-content .history-item:not(.active) {
  cursor: pointer;
}

.runfeng-development-history-content .swiper-slide>.history-item:first-child {
  border-top: 2px solid rgba(129, 151, 171, 0.10);
}

.history-item .left-content {
  width: calc(360 / 980 * 100%);
  flex-shrink: 0;
}

.history-item .right-content {
  flex: 1;
}

.history-item .left-content .history-item-year-container {
  display: flex;
  align-items: center;
  gap: 20px;
}

.history-item .left-content .history-item-year {
  font-family: var(--title-font-family);
  font-size: var(--title-size-h4);
  font-weight: 700;
  line-height: 1.2;
}

.history-item .left-content .history-item-year-container svg {
  width: var(--title-size-h4);
  height: var(--title-size-h4);
  overflow: hidden;
  max-height: 60px;
  opacity: 1;
  transition: all 0.2s ease;
}

.history-item .history-right-item,
.history-item .history-item-data-list-container {
  display: none;
}

.history-item.active .history-right-item,
.history-item.active .history-item-data-list-container {
  display: block;
}

.history-item.active .history-item-year-container svg {
  max-height: 0px;
  opacity: 0;
}

.history-item .left-content .history-item-data-list-container {
  margin-top: var(--text-gap-md);
}

.history-item .left-content .history-item-data-list {
  border: none;
  flex-direction: column;
  gap: 16px;
}

.history-item .left-content .history-left-item {
  margin-bottom: 0;
}

.history-item .left-content .history-left-item .nav-link {
  background: none;
  border: none;
  border-radius: 0;
  padding: 0;
}

.history-item .left-content .history-left-item-title {
  color: rgba(40, 40, 40, 0.40);
  font-family: var(--text-font-family);
  font-size: var(--text-size);
  font-weight: 400;
  line-height: 1.375;
}

.history-item .left-content .history-left-item-desc {
  color: rgba(40, 40, 40, 0.70);
  font-size: var(--text-flag-size);
  font-weight: 400;
  line-height: 1.5;
  margin-top: 11px;
  display: none;
}

@media screen and (min-width: 769px) {
  .history-item .left-content .history-left-item-desc {
    display: none !important;
  }
}

.history-item .left-content .nav-link.active .history-left-item-title {
  color: #282828;
  text-decoration-line: underline;
}

.history-item .right-content .history-right-item-title {
  font-family: var(--title-font-family);
  color: #282828;
  font-size: var(--title-size-h6);
  font-weight: 700;
  line-height: calc(34 / 24 * 1em);
  
}

.history-item .right-content .history-right-item-desc {
  color: rgba(40, 40, 40, 0.70);
  font-size: var(--text-flag-size);
  font-weight: 400;
  line-height: 1.5;
  
}

.history-right-item {
  height: 0;
  overflow: hidden;
}

.history-right-item.active {
  height: auto;
  padding-top: calc(var(--text-gap-md)/2);
}

.runfeng-development-history-content .swiper-pagination {
  bottom: 0 !important;
  line-height: 0;
  font-size: 0px;
}

.runfeng-development-history-content .swiper-pagination .swiper-pagination-bullet {
  background: rgba(40, 40, 40, 0.20);
}

.runfeng-development-history-content .swiper-pagination .swiper-pagination-bullet-active {
  background: #282828;
}


@media (max-width: 1500px) {
  .runfeng-development-history-content {
    gap: 50px;
  }

  .runfeng-development-history-content .history-item {
    gap: 60px;
  }
}

@media (max-width: 1200px) {
  .runfeng-development-history-content {
    gap: 30px;
  }

  .runfeng-development-history-content .history-item {
    gap: 40px;
  }
}

@media (max-width: 992px) {
  .runfeng-development-history-content .left-picture {
    display: none;
  }

  .runfeng-development-history-content .right-box {
    width: 100%;
  }

  .runfeng-development-history-content .history-item {
    padding: 24px 0;
  }
}

@media (max-width: 768px) {
  .history-item .right-content {
    display: none;
  }

  .history-item .left-content {
    width: 100%;
  }

  .history-item .left-content .nav-link.active .history-left-item-desc {
    display: block;
  }
}

@media (max-width: 576px) {}

@media (max-width: 480px) {}