.page-about {
  scroll-margin-top: calc(var(--header-h) + 16px);
}
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  background: var(--color-dark);
  color: var(--color-milk);
  padding: 56px 20px 96px;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 48px;
  background: var(--color-cream);
  clip-path: polygon(0 0, 100% 0, 100% 40%, 0 100%);
}
.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}
.page-about .about-hero .breadcrumb {
  margin-bottom: 28px;
}
.page-about .about-hero .breadcrumb__list {
  color: rgba(255, 253, 245, 0.7);
}
.page-about .about-hero .breadcrumb__item a {
  color: var(--color-milk);
  text-decoration-color: rgba(255, 253, 245, 0.4);
}
.page-about .about-hero .breadcrumb__item[aria-current="page"] {
  color: var(--color-orange);
}
.page-about .about-hero .sec-index {
  color: var(--color-orange);
  margin-bottom: 0.5rem;
}
.page-about .about-hero__title {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.1;
  margin: 0.2em 0 0.15em;
  letter-spacing: 0.01em;
  color: var(--color-milk);
}
.page-about .about-hero__subtitle {
  font-family: var(--font-data);
  font-size: 1.15rem;
  color: var(--color-orange);
  letter-spacing: 0.02em;
  margin-bottom: 1rem;
}
.page-about .about-hero__lead {
  max-width: 62ch;
  margin: 0 0 1.8rem;
  font-size: 1.05rem;
  line-height: 1.8;
  color: rgba(255, 253, 245, 0.85);
}
.page-about .about-hero__lead + .btn {
  margin-bottom: 0;
}

.page-about .about-layout {
  display: flex;
  flex-direction: column;
  gap: 32px;
  padding: 48px 0 80px;
}
.page-about .about-index__label {
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--color-gray);
  margin-bottom: 8px;
  text-transform: uppercase;
}
.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: thin;
}
.page-about .about-index__list a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: 1px solid var(--color-silver);
  background: var(--color-milk);
  color: var(--color-ink);
  text-decoration: none;
  font-size: 0.85rem;
  transition: background-color 0.2s var(--ease-snap), color 0.2s var(--ease-snap);
}
.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  background: var(--color-green);
  border-color: var(--color-green);
  color: var(--color-milk);
}
.page-about .about-index__num {
  font-family: var(--font-data);
  font-size: 0.75em;
  color: var(--color-orange);
}
.page-about .about-main {
  display: flex;
  flex-direction: column;
  gap: 72px;
  min-width: 0;
}
.page-about .about-section {
  scroll-margin-top: calc(var(--header-h) + 20px);
}
.page-about .about-section > h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800;
  line-height: 1.2;
  margin: 0.4em 0 0.3em;
}
.page-about .about-section > .lead {
  margin-bottom: 24px;
}
.page-about .about-timeline__img {
  margin: 32px 0 40px;
}
.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 8px 0 0;
  position: relative;
}
.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 24px;
  width: 2px;
  background: repeating-linear-gradient(
    to bottom,
    var(--color-silver) 0px,
    var(--color-silver) 6px,
    transparent 6px,
    transparent 12px
  );
}
.page-about .timeline__item {
  position: relative;
  padding-left: 34px;
  margin-bottom: 28px;
}
.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 6px;
  width: 12px;
  height: 12px;
  background: var(--color-orange);
  border: 3px solid var(--color-cream);
  box-shadow: 0 0 0 1px var(--color-orange);
}
.page-about .timeline__node summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-family: var(--font-heading);
  color: var(--color-ink);
}
.page-about .timeline__node summary::-webkit-details-marker {
  display: none;
}
.page-about .timeline__year {
  font-family: var(--font-data);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-orange);
  line-height: 1;
}
.page-about .timeline__title {
  font-size: 1.15rem;
  font-weight: 700;
}
.page-about .timeline__node p {
  margin: 10px 0 0;
  color: var(--color-ink);
  opacity: 0.85;
  line-height: 1.7;
}
.page-about .timeline__node[open] summary {
  color: var(--color-green);
}
.page-about .timeline__node[open] .timeline__year {
  color: var(--color-green);
}

.page-about .about-mission__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin: 32px 0 24px;
}
.page-about .about-mission__item {
  background: var(--color-milk);
  border-left: 4px solid var(--color-green);
  padding: 24px;
}
.page-about .about-mission__item h3 {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  margin-bottom: 8px;
}
.page-about .about-mission__item p {
  line-height: 1.7;
}

.page-about .about-tech {
  position: relative;
  background: var(--color-dark);
  color: var(--color-milk);
  padding: 64px 24px 88px;
  overflow: hidden;
}
.page-about .about-tech::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 48px;
  background: var(--color-cream);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 40%);
}
.page-about .about-tech > * {
  position: relative;
  z-index: 1;
}
.page-about .about-tech h2,
.page-about .about-tech .lead,
.page-about .about-tech .sec-index {
  color: var(--color-milk);
}
.page-about .about-tech .lead {
  opacity: 0.8;
}
.page-about .about-tech__img {
  margin: 28px 0 32px;
}
.page-about .about-tech .img-frame__caption {
  color: rgba(255, 253, 245, 0.7);
}
.page-about .about-tech__list {
  list-style: none;
  margin: 28px 0 32px;
  padding: 0;
}
.page-about .about-tech__list li {
  display: flex;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 253, 245, 0.15);
  line-height: 1.6;
}
.page-about .about-tech__list li::before {
  content: "//";
  font-family: var(--font-data);
  color: var(--color-orange);
  flex-shrink: 0;
}

.page-about .about-local__stats,
.page-about .about-team__stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 32px 0;
}
.page-about .about-stat {
  background: var(--color-milk);
  border: 1px solid var(--color-silver);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.page-about .data-block__value {
  font-family: var(--font-data);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--color-orange);
  line-height: 1;
}
.page-about .data-block__unit {
  font-family: var(--font-data);
  font-size: 0.9rem;
  color: var(--color-gray);
}
.page-about .data-block__label {
  font-size: 0.85rem;
  color: var(--color-ink);
  opacity: 0.8;
}
.page-about .about-local__img {
  margin: 28px 0 24px;
}
.page-about .about-team p:last-child a {
  color: var(--color-green);
  text-decoration-color: var(--color-green);
  font-weight: 600;
}

.page-about .img-frame img {
  width: 100%;
  height: auto;
}

@media (min-width: 768px) {
  .page-about .about-layout {
    flex-direction: row;
    gap: 48px;
    padding: 64px 0 96px;
  }
  .page-about .about-index {
    flex: 0 0 220px;
    position: sticky;
    top: calc(var(--header-h) + 24px);
    max-height: calc(100vh - var(--header-h) - 48px);
    overflow-y: auto;
    align-self: flex-start;
  }
  .page-about .about-index__list {
    flex-direction: column;
    align-items: stretch;
    overflow: visible;
    white-space: normal;
    gap: 0;
  }
  .page-about .about-index__list a {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border: none;
    border-bottom: 1px solid var(--hdr-border);
    background: transparent;
    color: var(--color-ink);
    font-size: 0.9rem;
  }
  .page-about .about-index__list a:hover,
  .page-about .about-index__list a:focus-visible {
    background: transparent;
    color: var(--color-green);
    border-bottom-color: var(--color-green);
  }
  .page-about .about-main {
    flex: 1;
    gap: 96px;
  }
  .page-about .about-mission__grid {
    grid-template-columns: 1fr 1fr;
  }
  .page-about .about-local__stats,
  .page-about .about-team__stats {
    grid-template-columns: repeat(3, 1fr);
  }
  .page-about .about-tech {
    padding-left: 28px;
    padding-right: 28px;
  }
}