.page-about {
  --about-pad: clamp(40px, 7vw, 88px);
  position: relative;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 12% 0%, rgba(57, 246, 208, .10), transparent 46%),
    linear-gradient(180deg, var(--ink-deep) 0%, #081714 34%, var(--ink-graphite) 70%, var(--ink-deep) 100%);
  color: var(--mist);
  font-family: var(--font-cn);
  padding-bottom: clamp(32px, 5vw, 64px);
}

/* ---------- HERO ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(28px, 5vw, 64px) 0 clamp(28px, 4vw, 48px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(57, 246, 208, .07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(57, 246, 208, .07) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(circle at 26% 18%, #000 0%, transparent 68%);
  mask-image: radial-gradient(circle at 26% 18%, #000 0%, transparent 68%);
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  align-items: end;
}

.page-about .about-hero__copy {
  min-width: 0;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-size: clamp(32px, 7.4vw, 74px);
  line-height: 1.02;
  font-weight: 900;
  letter-spacing: -.02em;
  color: var(--mist);
}

.page-about .about-hero__title-accent {
  color: var(--cyan);
}

.page-about .about-hero__lead {
  max-width: 48ch;
  margin: 20px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--orange);
  font-size: clamp(15px, 2.1vw, 17px);
  line-height: 1.85;
  color: rgba(247, 255, 249, .78);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-hero__media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-graphite);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 3;
  object-fit: cover;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(26px, 4vw, 48px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-stat {
  background: rgba(6, 31, 26, .94);
  padding: 16px 16px 18px;
}

.page-about .about-stat__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(23px, 3.4vw, 33px);
  line-height: 1.1;
  color: var(--cyan);
  letter-spacing: -.01em;
}

.page-about .about-stat__unit {
  font-size: .5em;
  margin-left: 5px;
  color: var(--steel);
  letter-spacing: .06em;
}

.page-about .about-stat__label {
  margin: 8px 0 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: rgba(247, 255, 249, .6);
}

/* ---------- CHAPTER NAV ---------- */
.page-about .chapter-nav {
  position: sticky;
  top: var(--bar-h);
  z-index: 6;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding: 10px var(--gutter);
  background: rgba(6, 31, 26, .94);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  scrollbar-width: none;
}

.page-about .chapter-nav::-webkit-scrollbar {
  display: none;
}

.page-about .chapter-nav__link {
  flex: 0 0 auto;
  white-space: nowrap;
  font-size: 12.5px;
  letter-spacing: .06em;
  padding: 6px 12px;
  border: 1px solid transparent;
  color: rgba(247, 255, 249, .62);
  text-decoration: none;
  transition: color .18s ease, border-color .18s ease, background-color .18s ease;
}

.page-about .chapter-nav__link:hover,
.page-about .chapter-nav__link:focus-visible {
  color: var(--mist);
  border-color: var(--line);
}

.page-about .chapter-nav__link[aria-current="true"] {
  color: var(--ink-deep);
  background: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- SECTION SHELL ---------- */
.page-about .about-section {
  padding: var(--about-pad) 0;
}

.page-about .about-section + .about-section {
  border-top: 1px solid var(--line-soft);
}

.page-about .about-section__head {
  max-width: 62ch;
  margin-bottom: clamp(24px, 4vw, 44px);
}

.page-about .about-section__index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-about .about-section__title {
  margin: 12px 0 0;
  font-size: clamp(23px, 4.2vw, 38px);
  line-height: 1.16;
  font-weight: 900;
  letter-spacing: -.012em;
  color: var(--mist);
}

.page-about .about-section__lead {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(247, 255, 249, .68);
}

/* ---------- ORIGIN ---------- */
.page-about .origin {
  display: grid;
  gap: clamp(24px, 3.5vw, 44px);
}

.page-about .origin__body {
  min-width: 0;
  border-left: 1px solid var(--line);
  padding-left: clamp(16px, 3vw, 28px);
}

.page-about .origin__body p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.9;
  color: rgba(247, 255, 249, .8);
}

.page-about .origin__body p:first-child::first-letter {
  font-family: var(--font-mono);
  font-size: 2.4em;
  line-height: 1;
  color: var(--yellow);
  float: left;
  margin: 4px 10px 0 0;
}

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

.page-about .origin__aside {
  border: 1px solid var(--line);
  background: rgba(13, 18, 17, .8);
}

.page-about .origin__aside-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  justify-content: space-between;
  align-items: baseline;
  padding: 13px 16px;
  border-top: 1px solid var(--line-soft);
}

.page-about .origin__aside-row:first-child {
  border-top: 0;
}

.page-about .origin__aside-key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--steel);
  text-transform: uppercase;
}

.page-about .origin__aside-value {
  font-size: 13.5px;
  color: var(--mist);
  text-align: right;
}

/* ---------- MILESTONES ---------- */
.page-about .milestone {
  margin: 0;
  padding: 0 0 0 clamp(16px, 3vw, 30px);
  list-style: none;
  border-left: 1px solid var(--line);
}

.page-about .milestone__item {
  position: relative;
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 14px;
  padding: 22px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .milestone__item:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .milestone__item::before {
  content: "";
  position: absolute;
  left: calc(-1 * clamp(16px, 3vw, 30px) - 4px);
  top: 28px;
  width: 7px;
  height: 7px;
  background: var(--yellow);
  transition: background-color .18s ease;
}

.page-about .milestone__item:first-child::before {
  top: 6px;
}

.page-about .milestone__item:hover::before,
.page-about .milestone__item:focus-within::before {
  background: var(--cyan);
}

.page-about .milestone__year {
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.2vw, 20px);
  letter-spacing: .04em;
  color: var(--yellow);
  transition: color .18s ease;
}

.page-about .milestone__item:hover .milestone__year {
  color: var(--cyan);
}

.page-about .milestone__content {
  min-width: 0;
}

.page-about .milestone__title {
  margin: 0;
  font-size: clamp(17px, 2.5vw, 21px);
  font-weight: 800;
  line-height: 1.4;
  color: var(--mist);
}

.page-about .milestone__text {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: rgba(247, 255, 249, .7);
}

.page-about .milestone__tag {
  display: inline-block;
  margin-top: 12px;
  padding: 3px 9px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--steel);
}

/* ---------- ROLES ---------- */
.page-about .roles {
  display: grid;
  gap: clamp(24px, 3.5vw, 40px);
}

.page-about .roles__media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-graphite);
}

.page-about .roles__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .roles__list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-left: 1px solid var(--line);
}

.page-about .role {
  position: relative;
  padding: 16px 0 16px 24px;
  border-top: 1px solid var(--line-soft);
}

.page-about .role:first-child {
  border-top: 0;
  padding-top: 6px;
}

.page-about .role::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 22px;
  width: 7px;
  height: 7px;
  background: var(--steel);
  transition: background-color .18s ease, transform .18s ease;
}

.page-about .role:first-child::before {
  top: 12px;
}

.page-about .role:hover::before,
.page-about .role:focus-within::before {
  background: var(--cyan);
  transform: scale(1.25);
}

.page-about .role__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--orange);
}

.page-about .role__name {
  margin: 6px 0 0;
  font-size: clamp(16px, 2.2vw, 19px);
  font-weight: 800;
  color: var(--mist);
}

.page-about .role__desc {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(247, 255, 249, .66);
  transition: color .18s ease;
}

.page-about .role:hover .role__desc {
  color: rgba(247, 255, 249, .88);
}

/* ---------- NETWORK ---------- */
.page-about .network {
  display: grid;
  gap: clamp(24px, 3.5vw, 40px);
}

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

.page-about .net-item {
  background: rgba(6, 31, 26, .95);
  padding: 16px 14px 18px;
}

.page-about .net-item__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.2vw, 30px);
  line-height: 1.1;
  color: var(--yellow);
}

.page-about .net-item__unit {
  font-size: .5em;
  margin-left: 4px;
  color: var(--steel);
}

.page-about .net-item__label {
  margin: 8px 0 0;
  font-size: 12.5px;
  line-height: 1.65;
  color: rgba(247, 255, 249, .62);
}

.page-about .network__media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-graphite);
}

.page-about .network__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 30 / 19;
  object-fit: cover;
}

.page-about .network__note {
  margin: 0;
  padding: 16px 18px;
  border-left: 2px solid var(--cyan);
  background: rgba(13, 18, 17, .7);
  font-size: 14px;
  line-height: 1.85;
  color: rgba(247, 255, 249, .74);
}

/* ---------- PATH ---------- */
.page-about .path {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: pathstep;
}

.page-about .path__step {
  position: relative;
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0 18px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .path__step:first-child {
  border-top: 0;
  padding-top: 4px;
}

.page-about .path__step::after {
  content: "";
  position: absolute;
  left: 18px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--line);
  z-index: 0;
}

.page-about .path__step:first-child::after {
  top: 26px;
}

.page-about .path__step:last-child::after {
  bottom: calc(100% - 34px);
}

.page-about .path__no {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 26px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--ink-deep);
  background: var(--cyan);
}

.page-about .path__body {
  min-width: 0;
  padding-left: 2px;
}

.page-about .path__name {
  margin: 2px 0 0;
  font-size: clamp(16px, 2.2vw, 19px);
  font-weight: 800;
  color: var(--mist);
}

.page-about .path__desc {
  max-height: 0;
  overflow: hidden;
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(247, 255, 249, .7);
  opacity: 0;
  transition: max-height .28s ease, opacity .22s ease, margin-top .22s ease;
}

.page-about .path__step:hover .path__desc,
.page-about .path__step:focus-within .path__desc,
.page-about .path__step.is-open .path__desc {
  max-height: 9em;
  opacity: 1;
  margin-top: 8px;
}

/* ---------- TRUST ---------- */
.page-about .trust {
  display: grid;
  gap: clamp(22px, 3.5vw, 38px);
}

.page-about .trust__quote {
  margin: 0;
  padding: clamp(22px, 4vw, 38px);
  background: var(--paper);
  border: 1px solid var(--brown);
  color: var(--brown);
}

.page-about .trust__quote p {
  margin: 0;
  font-size: clamp(16px, 2.4vw, 20px);
  line-height: 1.75;
  font-weight: 700;
}

.page-about .trust__cite {
  display: block;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid rgba(36, 26, 18, .25);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  font-style: normal;
  text-transform: uppercase;
  color: rgba(36, 26, 18, .68);
}

.page-about .trust__list {
  display: grid;
  gap: 18px;
}

.page-about .trust__item {
  padding-left: 14px;
  border-left: 1px solid var(--line);
}

.page-about .trust__item-title {
  margin: 0;
  font-size: clamp(15px, 2.1vw, 18px);
  font-weight: 800;
  color: var(--mist);
}

.page-about .trust__item-text {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(247, 255, 249, .7);
}

/* ---------- CTA ---------- */
.page-about .about-section--cta {
  border-top: 1px solid var(--line);
  background:
    linear-gradient(135deg, rgba(57, 246, 208, .08), transparent 55%),
    rgba(13, 18, 17, .6);
}

.page-about .about-cta {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .about-cta__copy {
  max-width: 46ch;
}

.page-about .about-cta__links {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-cta__link {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 15px 16px;
  background: rgba(6, 31, 26, .96);
  text-decoration: none;
  transition: background-color .18s ease;
}

.page-about .about-cta__link:hover,
.page-about .about-cta__link:focus-visible {
  background: rgba(57, 246, 208, .12);
}

.page-about .about-cta__link-key {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .16em;
  color: var(--orange);
  min-width: 66px;
}

.page-about .about-cta__link-text {
  font-size: 14.5px;
  color: var(--mist);
}

/* ---------- RESPONSIVE ---------- */
@media (min-width: 700px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .milestone__item {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 26px;
  }

  .page-about .path__step {
    grid-template-columns: 54px minmax(0, 1fr);
    gap: 20px;
  }

  .page-about .path__step::after {
    left: 26px;
  }

  .page-about .path__no {
    width: 52px;
    height: 28px;
    font-size: 12.5px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  }

  .page-about .origin {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, .72fr);
    align-items: start;
  }

  .page-about .roles {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
    align-items: start;
  }

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

  .page-about .network__figures {
    grid-column: 1 / -1;
  }

  .page-about .network__note {
    grid-column: 1 / -1;
  }

  .page-about .trust {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    align-items: start;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
    align-items: center;
  }

  .page-about .path {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 4vw, 56px);
  }

  .page-about .path__step:nth-child(2) {
    border-top: 0;
    padding-top: 4px;
  }

  .page-about .path__step:nth-child(2)::after {
    top: 26px;
  }

  .page-about .chapter-nav {
    top: 0;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding-top: clamp(40px, 4vw, 72px);
  }

  .page-about .about-hero__media img {
    aspect-ratio: 5 / 4;
  }

  .page-about .milestone__item {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 36px;
    padding: 28px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .chapter-nav__link,
  .page-about .milestone__item::before,
  .page-about .milestone__year,
  .page-about .role::before,
  .page-about .role__desc,
  .page-about .path__desc,
  .page-about .about-cta__link {
    transition: none;
  }
}
<<<END>>>