.page-about {
  --about-measure: 720px;
  --about-hair: rgba(198, 161, 91, 0.28);
  --about-hair-soft: rgba(198, 161, 91, 0.16);
  --about-body: rgba(233, 242, 239, 0.78);
  background: var(--field);
  color: var(--chalk);
}

.page-about .crumbs__list > li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-about .about-inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-line);
}

.page-about .about-inline-link:hover {
  color: var(--flare);
  border-bottom-color: var(--flare);
}

/* ---------- hero ---------- */

.page-about .about-hero {
  position: relative;
  padding: 40px 0 52px;
  border-bottom: 1px solid var(--about-hair-soft);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 14px;
  height: 8px;
  background-image: repeating-linear-gradient(90deg, var(--about-hair) 0 1px, transparent 1px 26px);
  opacity: 0.75;
  pointer-events: none;
}

.page-about .about-hero__inner {
  display: grid;
  gap: 32px;
}

.page-about .about-hero__stamp {
  color: var(--brass);
  margin: 0 0 14px;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.1rem, 8vw, 4.4rem);
  line-height: 1.02;
  letter-spacing: -0.01em;
  margin: 0 0 20px;
  color: var(--chalk);
}

.page-about .about-hero__lede {
  max-width: 56ch;
  margin: 0 0 24px;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-hero__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--about-hair-soft);
  border: 1px solid var(--about-hair-soft);
}

.page-about .about-hero__fact {
  background: var(--field);
  padding: 16px 14px 18px;
}

.page-about .about-hero__fact dt {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-about .about-hero__fact dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.75rem;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-hero__unit {
  margin-left: 0.25em;
  font-size: 0.85rem;
  color: var(--brass);
}

/* ---------- .page-about grid ---------- */

.page-about .about-body {
  padding: 36px 0 64px;
}

.page-about .about-body__grid {
  display: grid;
  gap: 34px;
}

.page-about .about-toc {
  padding-bottom: 20px;
  border-bottom: 1px solid var(--about-hair-soft);
}

.page-about .about-toc .toc__title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--brass);
}

.page-about .about-toc .toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  border-left: 1px solid var(--about-hair-soft);
}

.page-about .about-toc .toc__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-left: -1px;
  padding: 8px 0 8px 12px;
  font-size: 14px;
  line-height: 1.45;
  color: var(--mist);
  text-decoration: none;
  border-left: 2px solid transparent;
}

.page-about .about-toc .toc__link:hover {
  color: var(--chalk);
}

.page-about .about-toc .toc__link[data-active="true"] {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: linear-gradient(90deg, rgba(79, 224, 196, 0.12), transparent 78%);
}

.page-about .about-toc .toc__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--brass);
}

/* ---------- chapters ---------- */

.page-about .about-chapter {
  padding: 0 0 40px;
}

.page-about .about-chapter + .about-chapter {
  padding-top: 4px;
}

.page-about .about-chapter__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 18px;
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 5.4vw, 2.35rem);
  line-height: 1.12;
  letter-spacing: -0.005em;
  color: var(--chalk);
}

.page-about .about-chapter .prose {
  max-width: var(--about-measure);
  font-size: 1rem;
  line-height: 1.85;
  color: var(--about-body);
}

.page-about .about-chapter .prose p {
  margin: 0 0 1.2em;
}

.page-about .about-chapter .prose p:last-child {
  margin-bottom: 0;
}

.page-about .about-chapter .prose strong {
  font-family: var(--font-mono);
  font-size: 1.1em;
  color: var(--cyan);
}

.page-about .about-chapter__cta {
  margin: 26px 0 0;
}

.page-about .about-note {
  max-width: var(--about-measure);
  margin: 24px 0 0;
  padding: 12px 16px;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--chalk);
  border-left: 3px solid var(--flare);
  background: linear-gradient(90deg, rgba(255, 122, 26, 0.12), transparent 76%);
}

/* ---------- figures ---------- */

.page-about .about-figure {
  margin: 0 0 26px;
}

.page-about .about-break {
  margin: 4px 0 40px;
}

.page-about .media img {
  display: block;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .media__caption {
  margin: 10px 0 0;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
  max-width: 62ch;
}

/* ---------- team cards ---------- */

.page-about .about-team {
  display: grid;
  gap: 18px;
  margin-top: 30px;
}

.page-about .about-team__card {
  padding: 22px 20px;
}

.page-about .about-team__count {
  display: block;
  margin-bottom: 10px;
  color: var(--flare);
}

.page-about .about-team__card h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.2rem;
  letter-spacing: 0.01em;
  color: var(--chalk);
}

.page-about .about-team__card p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--about-body);
}

/* ---------- cities ---------- */

.page-about .about-cities {
  display: grid;
  gap: 1px;
  margin-top: 26px;
  background: var(--about-hair-soft);
  border: 1px solid var(--about-hair-soft);
}

.page-about .about-city {
  --city: var(--cyan);
  background: var(--field);
  padding: 22px 20px 24px;
}

.page-about .about-city--sh { --city: var(--cyan); }
.page-about .about-city--cd { --city: var(--flare); }
.page-about .about-city--gz { --city: var(--board); }
.page-about .about-city--hz { --city: var(--brass); }

.page-about .about-city__mark {
  display: block;
  width: 48px;
  height: 24px;
  color: var(--city);
  margin-bottom: 12px;
}

.page-about .about-city__name {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.55rem;
  letter-spacing: 0.02em;
  color: var(--city);
}

.page-about .about-city__focus {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-about .about-city p:last-child {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--about-body);
}

/* ---------- versions ---------- */

.page-about .about-version__grid {
  display: grid;
  gap: 28px;
  margin-top: 26px;
}

.page-about .about-version__figure {
  margin: 0;
}

.page-about .about-tl {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 8px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--brass), rgba(198, 161, 91, 0.1));
}

.page-about .about-tl__item {
  position: relative;
  padding: 0 0 28px 42px;
}

.page-about .about-tl__item:last-child {
  padding-bottom: 0;
}

.page-about .about-tl__node {
  position: absolute;
  left: 0;
  top: 3px;
  width: 19px;
  height: 19px;
  background: var(--field);
  border: 1px solid var(--brass);
  transform: rotate(45deg);
  transition: border-color 0.25s ease, background 0.25s ease, transform 0.25s ease;
}

.page-about .about-tl__item:hover .about-tl__node,
.page-about .about-tl__item:focus-within .about-tl__node {
  border-color: var(--flare);
  background: rgba(255, 122, 26, 0.18);
  transform: rotate(45deg) scale(1.12);
}

.page-about .about-tl__ver {
  display: inline-block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--brass);
}

.page-about .about-tl__body h3 {
  margin: 0 0 8px;
  font-size: 1.08rem;
  line-height: 1.4;
  color: var(--chalk);
}

.page-about .about-tl__body p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--about-body);
}

/* ---------- version table ---------- */

.page-about .about-table-wrap {
  margin-top: 34px;
  padding: 22px 18px 18px;
}

.page-about .about-table__caption {
  text-align: left;
  color: rgba(26, 21, 16, 0.55);
  margin-bottom: 14px;
}

.page-about .about-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  color: var(--ink);
}

.page-about .about-table th,
.page-about .about-table td {
  text-align: left;
  vertical-align: top;
  padding: 11px 12px 11px 0;
  border-bottom: 1px solid rgba(26, 21, 16, 0.16);
}

.page-about .about-table thead th {
  font-size: 12px;
  letter-spacing: 0.16em;
  font-weight: 500;
  color: rgba(26, 21, 16, 0.6);
}

.page-about .about-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-about .about-table td:first-child {
  font-family: var(--font-mono);
  color: #A8410F;
  white-space: nowrap;
}

/* ---------- updates steps ---------- */

.page-about .about-steps {
  display: grid;
  gap: 1px;
  margin-top: 26px;
  background: var(--about-hair-soft);
  border: 1px solid var(--about-hair-soft);
}

.page-about .about-step {
  background: var(--turf);
  padding: 22px 18px 24px;
  border-left: 2px solid transparent;
  transition: border-color 0.25s ease, background 0.25s ease;
}

.page-about .about-step:hover {
  border-left-color: var(--flare);
  background: var(--turf-lift);
}

.page-about .about-step__time {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--flare);
}

.page-about .about-step h3 {
  margin: 0 0 10px;
  font-size: 1.05rem;
  line-height: 1.4;
  color: var(--chalk);
}

.page-about .about-step p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.75;
  color: var(--about-body);
}

/* ---------- end block ---------- */

.page-about .about-end {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 28px;
  border-top: 1px solid var(--about-hair-soft);
}

.page-about .about-end__line {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.15rem;
  letter-spacing: 0.06em;
  color: var(--brass);
}

/* ---------- responsive ---------- */

@media (min-width: 640px) {
  .page-about .about-hero {
    padding: 52px 0 62px;
  }

  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-cities {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-table-wrap {
    padding: 26px 26px 20px;
  }
}

@media (min-width: 860px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 52px;
    align-items: end;
  }

  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .about-version__grid {
    grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
    gap: 46px;
    align-items: start;
  }

  .page-about .about-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-break {
    width: 66%;
    margin-left: auto;
  }
}

@media (min-width: 980px) {
  .page-about .about-body__grid {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 60px;
    align-items: start;
  }

  .page-about .about-toc {
    position: sticky;
    top: 88px;
    padding-bottom: 0;
    border-bottom: 0;
  }
}

@media (max-width: 639px) {
  .page-about .about-table thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
  }

  .page-about .about-table,
  .page-about .about-table tbody,
  .page-about .about-table tr,
  .page-about .about-table td {
    display: block;
    width: 100%;
  }

  .page-about .about-table tr {
    padding: 14px 0;
    border-bottom: 1px solid rgba(26, 21, 16, 0.16);
  }

  .page-about .about-table tbody tr:last-child {
    border-bottom: 0;
  }

  .page-about .about-table td {
    padding: 0 0 6px;
    border-bottom: 0;
  }

  .page-about .about-table td::before {
    content: attr(data-label);
    display: block;
    font-size: 11px;
    letter-spacing: 0.16em;
    color: rgba(26, 21, 16, 0.5);
    margin-bottom: 2px;
  }

  .page-about .about-table td:first-child {
    font-size: 1.05rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-tl__node,
  .page-about .about-step {
    transition: none;
  }
}