.page-about {
  --about-rail-w: 172px;
  --about-gap: 56px;
  background: var(--ink-900);
  color: var(--mist);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- HERO ---------- */
.page-about .about-hero {
  position: relative;
  padding: 28px 0 56px;
  background:
    linear-gradient(162deg, var(--ink-950) 0%, var(--ink-900) 46%, #10284d 100%);
  overflow: hidden;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 2;
}

.page-about .about-hero__wedge {
  position: absolute;
  right: -12%;
  bottom: -30%;
  width: 62%;
  height: 78%;
  background: linear-gradient(200deg, rgba(42, 245, 214, .10), rgba(42, 245, 214, 0) 62%);
  clip-path: polygon(28% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
  z-index: 1;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 28px;
  margin-top: 24px;
}

.page-about .about-hero__text .display-1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 8.4vw, 62px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  margin: 12px 0 18px;
  color: var(--mist);
}

.page-about .about-hero__text .lede {
  font-size: 15px;
  line-height: 1.78;
  color: var(--steel);
  max-width: 60ch;
  margin: 0 0 26px;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
  margin: 0;
  padding-top: 22px;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-fact {
  display: flex;
  flex-direction: column-reverse;
  gap: 4px;
}

.page-about .about-fact__num {
  font-size: clamp(24px, 6vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-fact__num span {
  font-size: .62em;
  margin-left: 1px;
  color: var(--cyan);
  opacity: .8;
}

.page-about .about-fact__label {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--steel);
}

.page-about .about-hero__media {
  margin: 0;
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 34px), calc(100% - 34px) 100%, 0 100%);
  background: var(--ink-800);
}

.page-about .about-hero__media .media__img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
}

.page-about .about-hero__media .media__caption {
  padding: 10px 14px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--steel);
  border-top: 1px solid var(--line-soft);
}

/* ---------- BODY FRAME ---------- */
.page-about .about-body {
  position: relative;
  padding-bottom: 72px;
}

.page-about .about-body__inner {
  display: grid;
  gap: 28px;
  padding-top: 44px;
}

/* ---------- RAIL ---------- */
.page-about .about-rail {
  min-width: 0;
}

.page-about .about-rail__caption {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--steel);
  margin: 0 0 10px;
  text-transform: uppercase;
}

.page-about .about-rail__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 12px;
  border: 1px solid var(--line-soft);
  color: var(--steel);
  text-decoration: none;
  font-size: 12.5px;
  white-space: nowrap;
  transition: color .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--mist);
  border-color: var(--cyan);
  background: var(--cyan-soft);
}

.page-about .about-rail__link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .about-rail__tick {
  display: none;
}

.page-about .about-rail__num {
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--cyan);
}

/* ---------- CHAPTERS ---------- */
.page-about .about-chapters {
  min-width: 0;
}

.page-about .about-chapter {
  border-top: 1px solid var(--line-soft);
  padding-top: 24px;
  margin-bottom: 56px;
  scroll-margin-top: 88px;
}

.page-about .about-chapter__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 20px;
}

.page-about .about-chapter__num {
  font-family: var(--font-display);
  font-size: 13px;
  letter-spacing: .22em;
  line-height: 1.5;
  color: var(--cyan);
  padding-top: 5px;
  flex: none;
}

.page-about .about-chapter__title {
  font-family: var(--font-body);
  font-weight: 800;
  font-size: clamp(21px, 5.2vw, 30px);
  line-height: 1.32;
  letter-spacing: -0.005em;
  color: var(--mist);
  margin: 0;
}

.page-about .about-chapter__lede {
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--steel);
  margin: 0 0 24px;
  max-width: 62ch;
}

.page-about .about-chapter__prose p {
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--mist);
  margin: 0 0 16px;
  max-width: 66ch;
}

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

.page-about .about-chapter__tail {
  font-size: 15px;
  line-height: 1.8;
  color: var(--steel);
  margin: 28px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--line);
  max-width: 64ch;
}

.page-about .about-quote {
  margin: 28px 0 0;
  padding: 20px 22px;
  background: linear-gradient(100deg, rgba(42, 245, 214, .09), rgba(42, 245, 214, 0));
  border-left: 3px solid var(--cyan);
}

.page-about .about-quote p {
  margin: 0;
  font-size: 16px;
  line-height: 1.7;
  font-weight: 600;
  color: var(--mist);
}

/* ---------- TRIO ---------- */
.page-about .about-trio {
  display: grid;
  gap: 18px;
}

.page-about .about-trio__col {
  position: relative;
  padding: 20px 18px 20px 24px;
  background: var(--ink-800);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
  transition: transform .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-trio__col:hover,
.page-about .about-trio__col:focus-visible {
  transform: translateY(-4px);
  border-color: var(--accent);
  outline: none;
}

.page-about .about-trio__col:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.page-about .about-trio__col--grass { --accent: var(--grass); }
.page-about .about-trio__col--orange { --accent: var(--orange); }
.page-about .about-trio__col--cyan { --accent: var(--cyan); }

.page-about .about-trio__bar {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--accent);
}

.page-about .about-trio__name {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: .02em;
  color: var(--accent);
  margin: 0 0 10px;
}

.page-about .about-trio__scope {
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
  margin: 0 0 14px;
}

.page-about .about-trio__stat {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--steel);
  margin: 0 0 4px;
}

.page-about .about-trio__stat .mono {
  font-size: 19px;
  font-weight: 700;
  color: var(--accent);
  margin-right: 4px;
  font-variant-numeric: tabular-nums;
}

.page-about .about-trio__note {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--dim);
  margin: 0;
}

/* ---------- FLOW ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-flow__step {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 16px;
  padding: 20px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-flow__step:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-flow__idx {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--ink-900);
  background: var(--cyan);
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
}

.page-about .about-flow__title {
  font-size: 16px;
  font-weight: 700;
  color: var(--mist);
  margin: 0 0 8px;
}

.page-about .about-flow__body p {
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--steel);
  margin: 0;
  max-width: 62ch;
}

/* ---------- CODE ---------- */
.page-about .about-code {
  display: grid;
  gap: 22px;
}

.page-about .about-code__text p {
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--mist);
  margin: 0 0 16px;
  max-width: 64ch;
}

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

.page-about .about-code__media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-800);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-about .about-code__media .media__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-code__media .media__caption {
  padding: 10px 14px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--steel);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-codelist {
  margin-top: 22px;
  display: grid;
  gap: 10px;
}

.page-about .about-codeline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: 12px 14px;
  background: rgba(143, 163, 191, .12);
  border-left: 3px solid var(--orange);
}

.page-about .about-codeline__code {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--mist);
  font-variant-numeric: tabular-nums;
}

.page-about .about-codeline__desc {
  font-size: 12.5px;
  color: var(--steel);
  margin-right: auto;
}

/* ---------- TIMELINE ---------- */
.page-about .about-line {
  display: flex;
  gap: 16px;
  margin: 0 -20px;
  padding: 6px 20px 20px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  scrollbar-width: thin;
}

.page-about .about-line:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-about .about-line__node {
  position: relative;
  flex: 0 0 230px;
  scroll-snap-align: start;
  padding: 22px 16px 18px;
  background: var(--ink-800);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  transition: border-color .2s var(--ease), transform .2s var(--ease);
}

.page-about .about-line__node:hover,
.page-about .about-line__node:focus-visible {
  border-color: var(--amber);
  transform: translateY(-3px);
  outline: none;
}

.page-about .about-line__node:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}

.page-about .about-line__diamond {
  position: absolute;
  top: -8px;
  left: 16px;
  width: 16px;
  height: 16px;
  background: var(--amber);
  transform: rotate(45deg);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
}

.page-about .about-line__stage {
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--orange);
  margin: 4px 0 8px;
}

.page-about .about-line__title {
  font-size: 16px;
  font-weight: 800;
  color: var(--mist);
  margin: 0 0 8px;
}

.page-about .about-line__text {
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--steel);
  margin: 0;
}

/* ---------- WHO ---------- */
.page-about .about-who {
  display: grid;
  gap: 16px;
}

.page-about .about-who__item {
  padding: 20px 18px;
  border: 1px solid var(--line-soft);
  border-top: 2px solid var(--line);
  background: linear-gradient(180deg, rgba(22, 48, 92, .55), rgba(11, 30, 58, .2));
  transition: border-top-color .2s var(--ease);
}

.page-about .about-who__item:hover {
  border-top-color: var(--cyan);
}

.page-about .about-who__tag {
  display: inline-block;
  font-size: 11.5px;
  letter-spacing: .1em;
  padding: 3px 9px;
  margin-bottom: 12px;
}

.page-about .about-who__title {
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--mist);
  margin: 0 0 10px;
}

.page-about .about-who__item p {
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--steel);
  margin: 0;
}

/* ---------- HORIZON ---------- */
.page-about .about-horizon {
  position: relative;
  margin: 0 0 56px;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  background: var(--ink-950);
}

.page-about .about-horizon__img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 380px;
  object-fit: cover;
  opacity: .82;
}

.page-about .about-horizon__caption {
  position: absolute;
  left: 20px;
  bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--mist);
  background: rgba(14, 17, 22, .7);
  padding: 5px 10px;
}

/* ---------- PARTNER ---------- */
.page-about .about-partner {
  display: grid;
  gap: 0;
}

.page-about .about-partner__block {
  padding: 20px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-partner__block:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-partner__title {
  font-size: 16px;
  font-weight: 700;
  color: var(--mist);
  margin: 0 0 10px;
  padding-left: 14px;
  position: relative;
}

.page-about .about-partner__title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 6px;
  height: 6px;
  background: var(--grass);
  transform: rotate(45deg);
}

.page-about .about-partner__block p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--steel);
  margin: 0;
  max-width: 64ch;
}

/* ---------- CTA ---------- */
.page-about .about-cta {
  margin-top: 30px;
  padding: 24px 20px;
  background: linear-gradient(112deg, rgba(255, 138, 61, .16), rgba(255, 138, 61, 0) 68%);
  border-left: 3px solid var(--orange);
}

.page-about .about-cta__text {
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
  margin: 0 0 18px;
  max-width: 58ch;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- RESPONSIVE ---------- */
@media (min-width: 600px) {
  .page-about .about-hero__facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 34px 0 76px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 5fr);
    gap: 48px;
    align-items: end;
    margin-top: 36px;
  }

  .page-about .about-code {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .about-who {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-chapter {
    margin-bottom: 72px;
  }

  .page-about .about-cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
  }

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

@media (min-width: 1024px) {
  .page-about .about-body__inner {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: var(--about-gap);
    padding-top: 56px;
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 96px;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
    position: relative;
  }

  .page-about .about-rail__list::before {
    content: "";
    position: absolute;
    left: 5px;
    top: 10px;
    bottom: 10px;
    width: 1px;
    background: var(--line);
  }

  .page-about .about-rail__link {
    border: 0;
    background: none;
    padding: 9px 0 9px 20px;
    gap: 10px;
    width: 100%;
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    background: none;
    border-color: transparent;
    color: var(--cyan);
  }

  .page-about .about-rail__link:hover .about-rail__txt,
  .page-about .about-rail__link:focus-visible .about-rail__txt {
    color: var(--mist);
  }

  .page-about .about-rail__tick {
    display: block;
    position: absolute;
    left: 0;
    width: 11px;
    height: 11px;
    background: var(--ink-900);
    border: 1px solid var(--line);
    border-radius: 50%;
    margin-left: 0;
    align-self: center;
  }

  .page-about .about-rail__link:hover .about-rail__tick,
  .page-about .about-rail__link:focus-visible .about-rail__tick {
    border-color: var(--cyan);
    background: var(--cyan);
  }

  .page-about .about-rail__num {
    font-size: 12px;
    color: var(--steel);
  }

  .page-about .about-rail__txt {
    font-size: 13.5px;
    color: var(--steel);
    transition: color .18s var(--ease);
  }

  .page-about .about-chapter__num {
    writing-mode: vertical-rl;
    font-size: 28px;
    letter-spacing: .18em;
    color: var(--line);
    line-height: 1;
    padding-top: 2px;
    font-weight: 700;
  }

  .page-about .about-chapter__title {
    font-size: 30px;
  }

  .page-about .about-line {
    margin: 0;
    padding: 6px 0 24px;
  }
}

@media (min-width: 1220px) {
  .page-about {
    --about-gap: 72px;
  }

  .page-about .about-chapter__title {
    font-size: 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-trio__col,
  .page-about .about-line__node,
  .page-about .about-rail__link {
    transition: none;
  }

  .page-about .about-trio__col:hover,
  .page-about .about-line__node:hover {
    transform: none;
  }
}