.about-history {
  padding-top: calc(var(--header-height-mobile) + var(--spacing-xl));
  background-image:
    linear-gradient(rgba(0 0 0 / 0.025) 0%, rgba(0 0 0 / 0) 50%),
    linear-gradient(rgba(92 128 179 / 0.0), rgba(92 128 179 / 0.50));
}

.about-timeline {
  background-image:
    linear-gradient(rgba(255 255 255 / 0.9), rgba(255 255 255 / 0.9)),
    url("../img/bg1.webp");
  background-position: center;
  background-size: cover;
}

.about-essence {
  background-image:
    linear-gradient(rgba(92 128 179 / 0.1), rgba(92 128 179 / 0.25)),
    linear-gradient(rgba(255 255 255 / 0.5), rgba(255 255 255 / 0.5)),
    url("../img/bg2.webp");
  background-position: center;
  background-size: cover;
}

@media (min-width: 768px) {

  .about-history .section-content,
  .about-timeline .section-content,
  .about-essence .section-content {
    column-count: 2;
    column-gap: var(--spacing-xl);
  }

}