.page-about {
  --ab-rail: 44px;
  background-color: var(--ink);
  background-image:
    linear-gradient(rgba(46, 58, 80, 0.28) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 58, 80, 0.28) 1px, transparent 1px);
  background-size: 72px 72px, 72px 72px;
  background-position: -1px -1px;
  color: var(--text);
}

.page-about .ab-link {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 232, 176, 0.4);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.page-about .ab-link:hover,
.page-about .ab-link:focus-visible {
  color: var(--text);
  border-bottom-color: var(--text);
}

.page-about .ab-hl {
  color: var(--accent);
  font-weight: 600;
}

/* ===== HERO ===== */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding: 34px 0 0;
  border-bottom: 1px solid var(--line);
}

.page-about .ab-hero__bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
}
.page-about .ab-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 15, 30, 0.7) 0%, rgba(10, 15, 30, 0.88) 56%, var(--ink) 100%);
}
.page-about .ab-hero__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 62%;
  opacity: 0.44;
}

.page-about .ab-hero__inner {
  position: relative;
  z-index: 1;
  padding-bottom: 42px;
}

.page-about .ab-hero__crumbs {
  margin-bottom: 26px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
}
.page-about .ab-hero__crumbs a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}
.page-about .ab-hero__crumbs a:hover,
.page-about .ab-hero__crumbs a:focus-visible {
  color: var(--accent);
}
.page-about .ab-hero__crumbs .crumbs__sep {
  margin: 0 8px;
  color: var(--line);
}
.page-about .ab-hero__crumbs [aria-current="page"] {
  color: var(--text);
}

.page-about .ab-hero__kicker {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.26em;
  color: var(--accent);
  text-transform: uppercase;
}

.page-about .ab-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-head);
  font-size: clamp(30px, 7.6vw, 62px);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--text);
  max-width: 22ch;
}

.page-about .ab-hero__lead {
  margin: 0 0 34px;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--text);
}

.page-about .ab-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.page-about .ab-facts__item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 14px 16px;
  background: var(--panel);
}
.page-about .ab-facts__num {
  font-family: var(--font-head);
  font-size: clamp(28px, 8vw, 42px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--accent);
}
.page-about .ab-facts__label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted);
}

/* ===== BODY GRID ===== */
.page-about .ab-body {
  padding: 44px 0 64px;
}

/* ===== TOC ===== */
.page-about .ab-toc {
  margin-bottom: 36px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}
.page-about .ab-toc__label {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--muted);
}
.page-about .ab-toc__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}
.page-about .ab-toc__link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 7px 10px;
  white-space: nowrap;
  font-size: 13px;
  line-height: 1.4;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: var(--radius);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}
.page-about .ab-toc__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--line);
  transition: color 0.2s var(--ease);
}
.page-about .ab-toc__link:hover,
.page-about .ab-toc__link:focus-visible {
  color: var(--text);
  border-color: var(--line);
}
.page-about .ab-toc__link[aria-current] {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(43, 232, 176, 0.08);
}
.page-about .ab-toc__link[aria-current] .ab-toc__no {
  color: var(--accent);
}

/* ===== FLOW + RAIL ===== */
.page-about .ab-flow {
  position: relative;
}
.page-about .ab-flow::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: calc(var(--ab-rail) / 2);
  width: 1px;
  background: linear-gradient(180deg, transparent 0%, rgba(46, 58, 80, 0.9) 5%, rgba(46, 58, 80, 0.9) 94%, transparent 100%);
}

.page-about .ab-sec {
  display: grid;
  grid-template-columns: var(--ab-rail) minmax(0, 1fr);
  column-gap: 12px;
  margin-bottom: 34px;
  transition: opacity 0.5s var(--ease), transform 0.5s var(--ease);
}
.page-about .ab-sec:last-child {
  margin-bottom: 0;
}
.js-ready .page-about .ab-sec[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
}
.js-ready .page-about .ab-sec[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

.page-about .ab-sec__rail {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: center;
  padding-top: 26px;
}
.page-about .ab-sec__dot {
  display: block;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--line);
  transition: border-color 0.45s var(--ease), box-shadow 0.45s var(--ease);
}
.page-about .ab-sec.is-visible .ab-sec__dot {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(43, 232, 176, 0.14);
}

.page-about .ab-sec__panel {
  margin: 0;
  padding: 20px 16px 22px;
}

.page-about .ab-sec__no {
  display: block;
  margin: 0 0 4px;
  font-family: var(--font-head);
  font-size: clamp(44px, 11vw, 88px);
  font-weight: 600;
  line-height: 0.84;
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
  color: var(--line);
  transition: color 0.45s var(--ease);
}
.page-about .ab-sec.is-visible .ab-sec__no {
  color: var(--accent);
}

.page-about .ab-sec__title {
  margin: 0 0 16px;
  padding-bottom: 13px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-head);
  font-size: clamp(21px, 5vw, 33px);
  font-weight: 600;
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-about .ab-sec__body {
  font-size: 15px;
  line-height: 1.82;
  color: var(--text);
}
.page-about .ab-sec__body > p {
  margin: 0 0 1.05em;
}
.page-about .ab-sec__body > p:last-child {
  margin-bottom: 0;
}

/* ===== REGION BAR + LIST ===== */
.page-about .ab-region-bar {
  display: flex;
  height: 12px;
  margin: 20px 0 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink);
}
.page-about .ab-region-bar span {
  display: block;
  height: 100%;
}
.page-about .ab-region-bar span:nth-child(1) { flex: 8; background: #2BE8B0; }
.page-about .ab-region-bar span:nth-child(2) { flex: 5; background: #1FD0A0; }
.page-about .ab-region-bar span:nth-child(3) { flex: 4; background: #0F8F72; }
.page-about .ab-region-bar span:nth-child(4) { flex: 3; background: #2E6E5E; }
.page-about .ab-region-bar span:nth-child(5) { flex: 3; background: #3C5A4A; }
.page-about .ab-region-bar span:nth-child(6) { flex: 3; background: #6E7E94; }

.page-about .ab-region-list {
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.page-about .ab-region {
  display: grid;
  grid-template-columns: 14px minmax(0, 1fr) auto;
  column-gap: 12px;
  row-gap: 2px;
  padding: 12px 8px 13px 0;
  border-bottom: 1px solid var(--line);
  transition: background-color 0.22s var(--ease);
}
.page-about .ab-region__swatch {
  grid-row: 1 / span 2;
  align-self: start;
  margin-top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 1px;
  background: var(--line);
  transition: transform 0.22s var(--ease);
}
.page-about .ab-region:nth-child(1) .ab-region__swatch { background: #2BE8B0; }
.page-about .ab-region:nth-child(2) .ab-region__swatch { background: #1FD0A0; }
.page-about .ab-region:nth-child(3) .ab-region__swatch { background: #0F8F72; }
.page-about .ab-region:nth-child(4) .ab-region__swatch { background: #2E6E5E; }
.page-about .ab-region:nth-child(5) .ab-region__swatch { background: #3C5A4A; }
.page-about .ab-region:nth-child(6) .ab-region__swatch { background: #6E7E94; }

.page-about .ab-region__name {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  transition: color 0.22s var(--ease);
}
.page-about .ab-region__count {
  font-family: var(--font-head);
  font-size: 22px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--accent);
}
.page-about .ab-region__note {
  grid-column: 2 / -1;
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}
.page-about .ab-region:hover {
  background: var(--panel-alt);
}
.page-about .ab-region:hover .ab-region__name {
  color: var(--accent);
}
.page-about .ab-region:hover .ab-region__swatch {
  transform: scaleX(1.6);
}

/* ===== FIGURES ===== */
.page-about .ab-figure {
  margin: 24px 0 24px;
}
.page-about .ab-figure .figure__frame {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink);
}
.page-about .ab-figure .figure__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-about .ab-figure .figure__cap {
  margin: 9px 0 0;
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--muted);
}

/* ===== TEAM ===== */
.page-about .ab-team {
  display: grid;
  gap: 16px;
  margin: 22px 0 0;
}
.page-about .ab-team__card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-alt);
  box-shadow: var(--shadow-plate);
  overflow: hidden;
}
.page-about .ab-team__card summary {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 15px 15px 14px;
  cursor: pointer;
  list-style: none;
}
.page-about .ab-team__card summary::-webkit-details-marker {
  display: none;
}
.page-about .ab-team__card summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: -3px;
}
.page-about .ab-team__tag {
  align-self: flex-start;
}
.page-about .ab-team__name {
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}
.page-about .ab-team__hint {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
}
.page-about .ab-team__card[open] .ab-team__hint {
  display: none;
}
.page-about .ab-team__card[open] {
  border-color: rgba(43, 232, 176, 0.42);
}
.page-about .ab-team__text {
  margin: 0;
  padding: 0 15px 17px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}
.page-about .ab-team__foot {
  margin: 22px 0 0 !important;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  color: var(--muted);
}

/* ===== REASONS ===== */
.page-about .ab-reasons {
  margin: 20px 0 20px;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.page-about .ab-reasons__item {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  column-gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.page-about .ab-reasons__no {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.85;
  color: var(--accent-deep);
}
.page-about .ab-reasons__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text);
}
.page-about .ab-reasons__text strong {
  color: var(--text);
  font-weight: 600;
}

/* ===== VERSIONS ===== */
.page-about .ab-vers {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}
.page-about .ab-vers__item {
  position: relative;
  padding: 18px 15px 16px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent-deep);
  border-radius: var(--radius);
  background: var(--panel-alt);
  transition: border-left-color 0.25s var(--ease), transform 0.25s var(--ease);
}
.page-about .ab-vers__item:hover {
  border-left-color: var(--accent);
  transform: translateX(3px);
}
.page-about .ab-vers__tag {
  display: inline-block;
  margin-bottom: 8px;
}
.page-about .ab-vers__name {
  margin: 0 0 7px;
  font-family: var(--font-head);
  font-size: 21px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}
.page-about .ab-vers__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}

/* ===== MILESTONES ===== */
.page-about .ab-mile {
  display: grid;
  gap: 22px 16px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .ab-mile__item {
  position: relative;
  padding: 24px 15px 17px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel-alt);
}
.page-about .ab-mile__tag {
  position: absolute;
  top: -11px;
  left: 13px;
  background: var(--ink);
  letter-spacing: 0.06em;
}
.page-about .ab-mile__title {
  margin: 0 0 7px;
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}
.page-about .ab-mile__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.76;
  color: var(--muted);
}

/* ===== NEXT ===== */
.page-about .ab-next {
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .ab-next__item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  column-gap: 12px;
  row-gap: 12px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.page-about .ab-next__item:first-child {
  border-top: 1px solid var(--line);
}
.page-about .ab-next__no {
  font-family: var(--font-head);
  font-size: 26px;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--accent-deep);
}
.page-about .ab-next__title {
  margin: 0 0 6px;
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text);
}
.page-about .ab-next__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--muted);
}
.page-about .ab-next__link {
  grid-column: 2 / -1;
  justify-self: start;
}

/* ===== OUTRO ===== */
.page-about .ab-outro {
  position: relative;
  padding: 0 0 60px;
  background: linear-gradient(180deg, rgba(27, 36, 54, 0.92) 0%, var(--ink) 100%);
  border-top: 1px solid var(--line);
}
.page-about .ab-slash {
  height: 26px;
  margin-bottom: 38px;
  background: var(--panel-alt);
  clip-path: polygon(0 0, 100% 100%, 100% 0);
  opacity: 0.85;
}
.page-about .ab-outro__inner {
  position: relative;
  z-index: 1;
}
.page-about .ab-outro__lead {
  margin: 0 0 24px;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.82;
  color: var(--text);
}
.page-about .ab-outro__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 18px;
}
.page-about .ab-outro__note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ===== TABLET+ ===== */
@media (min-width: 768px) {
  .page-about .ab-hero {
    padding-top: 44px;
  }
  .page-about .ab-hero__inner {
    padding-bottom: 54px;
  }
  .page-about .ab-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .ab-facts__item {
    padding: 16px 16px 18px;
  }
  .page-about .ab-sec__panel {
    padding: 26px 24px 28px;
  }
  .page-about .ab-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .ab-vers {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
  .page-about .ab-mile {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .ab-next__item {
    grid-template-columns: 40px minmax(0, 1fr) auto;
    align-items: start;
    column-gap: 18px;
  }
  .page-about .ab-next__link {
    grid-column: 3;
    justify-self: end;
    align-self: center;
  }
  .page-about .ab-outro {
    padding-bottom: 74px;
  }
}

/* ===== DESKTOP ===== */
@media (min-width: 1024px) {
  .page-about {
    --ab-rail: 88px;
  }
  .page-about .ab-hero {
    padding-top: 52px;
  }
  .page-about .ab-hero__lead {
    font-size: 17px;
  }
  .page-about .ab-body {
    display: grid;
    grid-template-columns: 214px minmax(0, 1fr);
    column-gap: 52px;
    align-items: start;
    padding: 76px 0 96px;
  }
  .page-about .ab-toc {
    position: sticky;
    top: 96px;
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: 0;
    border-left: 1px solid var(--line);
    padding-left: 16px;
  }
  .page-about .ab-toc__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-about .ab-toc__list > li + li {
    margin-top: 4px;
  }
  .page-about .ab-toc__link {
    display: flex;
    white-space: normal;
    padding: 8px 10px;
  }
  .page-about .ab-sec {
    column-gap: 34px;
    margin-bottom: 62px;
  }
  .page-about .ab-sec__rail {
    padding-top: 34px;
  }
  .page-about .ab-sec__dot {
    width: 14px;
    height: 14px;
  }
  .page-about .ab-sec__panel {
    padding: 34px 38px 34px;
  }
  .page-about .ab-sec__body {
    font-size: 16.2px;
  }
  .page-about .ab-region {
    grid-template-columns: 14px 1fr 60px 1.4fr;
    align-items: center;
    column-gap: 16px;
    row-gap: 0;
    padding: 13px 12px 13px 0;
  }
  .page-about .ab-region__swatch {
    grid-row: 1;
    margin-top: 0;
  }
  .page-about .ab-region__count {
    text-align: right;
  }
  .page-about .ab-region__note {
    grid-column: 4;
    font-size: 13px;
  }
  .page-about .ab-region:hover {
    background: var(--panel-alt);
    box-shadow: inset 3px 0 0 var(--accent);
  }
  .page-about .ab-figure {
    margin: 30px 0 28px;
  }
  .page-about .ab-outro__inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    column-gap: 44px;
    align-items: center;
  }
  .page-about .ab-outro__lead {
    margin-bottom: 0;
    grid-row: 1 / span 2;
  }
  .page-about .ab-outro__acts {
    margin-bottom: 12px;
    justify-content: flex-end;
  }
  .page-about .ab-outro__note {
    text-align: right;
  }
}

@media (min-width: 1280px) {
  .page-about .ab-sec__panel {
    padding: 38px 46px 40px;
  }
  .page-about .ab-sec__title {
    max-width: 26ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-sec,
  .page-about .ab-sec__no,
  .page-about .ab-sec__dot,
  .page-about .ab-toc__link,
  .page-about .ab-vers__item,
  .page-about .ab-region,
  .page-about .ab-region__swatch {
    transition: none;
  }
  .js-ready .page-about .ab-sec[data-reveal] {
    opacity: 1;
    transform: none;
  }
}