.page-about {
  --about-chapter-gap: clamp(34px, 5vw, 64px);
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(118px, 17vw, 176px) 0 clamp(44px, 6vw, 76px);
  background: var(--ink-900);
}

.page-about .about-hero__media {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .about-hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .4;
  filter: saturate(.7) contrast(1.05);
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(7, 11, 24, .82) 0%, rgba(7, 11, 24, .9) 55%, var(--ink-900) 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: .5;
  background-image:
    repeating-linear-gradient(90deg, rgba(34, 49, 79, .6) 0 1px, transparent 1px 108px),
    repeating-linear-gradient(0deg, rgba(34, 49, 79, .4) 0 1px, transparent 1px 108px);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .95), transparent 88%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .95), transparent 88%);
}

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

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-about .about-hero__head {
  max-width: 900px;
  padding: clamp(22px, 3.4vw, 40px) clamp(20px, 3.4vw, 44px);
  border: 1px solid var(--line);
  background: linear-gradient(150deg, rgba(14, 23, 48, .78), rgba(7, 11, 24, .58));
  box-shadow: var(--shadow-hard);
  position: relative;
}

.page-about .about-hero__head::before,
.page-about .about-hero__head::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border: 1px solid var(--cyan);
  opacity: .8;
}

.page-about .about-hero__head::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.page-about .about-hero__head::after {
  right: -1px;
  bottom: -1px;
  border-left: 0;
  border-top: 0;
}

.page-about .about-hero h1 {
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  font-size: clamp(34px, 6.4vw, 74px);
  font-weight: 200;
  line-height: 1.16;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-about .about-hero__lead {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  max-width: 40em;
  font-size: clamp(15px, 1.7vw, 18px);
  line-height: 1.9;
  color: var(--muted);
}

.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(26px, 4vw, 44px) 0 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-metrics > div {
  background: rgba(14, 23, 48, .9);
  padding: clamp(14px, 2vw, 22px);
}

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

.page-about .about-metrics dd {
  margin: 10px 0 0;
  display: flex;
  align-items: baseline;
  gap: 7px;
  flex-wrap: wrap;
}

.page-about .about-metrics__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.6vw, 38px);
  line-height: 1;
  color: var(--orange);
}

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

/* ---------- Body grid ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 40px);
  padding-top: clamp(38px, 6vw, 78px);
  padding-bottom: clamp(52px, 8vw, 110px);
}

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

/* ---------- Chapter index ---------- */
.page-about .about-index {
  min-width: 0;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-index__label {
  display: none;
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .26em;
  color: var(--muted);
}

.page-about .about-index ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  padding-bottom: 8px;
}

.page-about .about-index li {
  flex: none;
}

.page-about .about-index a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  white-space: nowrap;
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-index a span {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .1em;
  color: var(--violet);
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  color: var(--paper);
  border-color: var(--cyan);
  background: rgba(93, 224, 230, .08);
}

.page-about .about-index__jump {
  display: none;
  margin-top: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--orange);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 122, 61, .45);
  padding-bottom: 3px;
}

.page-about .about-index__jump:hover,
.page-about .about-index__jump:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

/* ---------- Chapters ---------- */
.page-about .chapter {
  padding-top: var(--about-chapter-gap);
  border-top: 1px solid var(--line);
}

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

.page-about .chapter__head {
  display: flex;
  align-items: baseline;
  gap: clamp(12px, 2vw, 18px);
  margin-bottom: clamp(18px, 2.8vw, 30px);
}

.page-about .chapter__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--orange);
  border: 1px solid var(--line);
  padding: 4px 8px;
}

.page-about .chapter__title {
  margin: 0;
  font-size: clamp(23px, 3.4vw, 38px);
  font-weight: 300;
  line-height: 1.28;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-about .chapter__body {
  color: var(--muted);
  min-width: 0;
}

.page-about .chapter__body > * + * {
  margin-top: clamp(18px, 2.6vw, 28px);
}

.page-about .chapter__body p {
  margin: 0;
  line-height: 1.9;
  font-size: 15.5px;
}

.page-about .chapter__body > p.chapter__lead {
  color: var(--paper);
  font-size: clamp(17px, 1.8vw, 21px);
  line-height: 1.82;
  font-weight: 300;
  max-width: 34em;
}

/* quote */
.page-about .chapter__quote {
  margin: 0;
  padding: clamp(20px, 3vw, 32px) clamp(20px, 3.2vw, 36px);
  border: 1px solid var(--line);
  border-left: 3px solid var(--violet);
  background: linear-gradient(135deg, rgba(124, 92, 255, .16), rgba(20, 31, 58, .72));
  box-shadow: var(--shadow-hard);
}

.page-about .chapter__quote p {
  font-size: clamp(17px, 2.1vw, 23px);
  font-weight: 300;
  line-height: 1.65;
  color: var(--paper);
  max-width: 30em;
}

/* split with figure */
.page-about .chapter__split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
  align-items: start;
}

.page-about .chapter__split p + p {
  margin-top: 16px;
}

.page-about .chapter__figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

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

.page-about .chapter__figure figcaption {
  padding: 12px 16px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

/* facts strip */
.page-about .about-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-facts li {
  background: var(--ink-800);
  padding: 15px 18px;
  display: flex;
  flex-direction: column;
  gap: 7px;
}

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

.page-about .about-facts__v {
  font-family: var(--font-mono);
  font-size: 17px;
  color: var(--cyan);
}

/* membership cycle cards */
.page-about .about-cycle {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .about-cycle__card {
  border: 1px solid var(--line);
  border-top: 3px solid var(--violet);
  background: var(--ink-700);
  padding: clamp(18px, 2.6vw, 26px);
  box-shadow: var(--shadow-hard);
}

.page-about .about-cycle__days {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--cyan);
}

.page-about .about-cycle__card h3 {
  margin: 12px 0 10px;
  font-size: 21px;
  font-weight: 500;
  color: var(--paper);
}

.page-about .about-cycle__card p {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted);
}

/* team */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-team__item {
  position: relative;
  border: 1px solid var(--line);
  background: var(--ink-800);
  padding: 18px 18px 18px 22px;
}

.page-about .about-team__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--violet);
}

.page-about .about-team__item h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 500;
  color: var(--paper);
  letter-spacing: .02em;
}

.page-about .about-team__item p {
  font-size: 14.5px;
  line-height: 1.85;
}

/* wide figure */
.page-about .about-wide-figure {
  margin: clamp(30px, 5vw, 56px) 0 0;
  border: 1px solid var(--line);
  position: relative;
}

.page-about .about-wide-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 14 / 9;
  filter: saturate(.8);
}

.page-about .about-wide-figure figcaption {
  padding: 12px 16px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
  border-top: 1px solid var(--line);
  background: var(--ink-800);
}

/* timeline */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--violet), rgba(124, 92, 255, .25) 46%, var(--orange));
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: clamp(22px, 3vw, 34px);
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--violet);
  box-sizing: content-box;
}

.page-about .about-timeline__item--content::before {
  border-color: var(--orange);
}

.page-about .about-timeline__stage {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--violet);
  margin-bottom: 8px;
}

.page-about .about-timeline__item--content .about-timeline__stage {
  color: var(--orange);
}

.page-about .about-timeline__item h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 500;
  color: var(--paper);
}

.page-about .about-timeline__item p {
  font-size: 14.5px;
  line-height: 1.88;
}

/* ecosystem */
.page-about .about-eco {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-eco__item {
  border: 1px solid var(--line);
  background: var(--ink-800);
  padding: 20px;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-eco__item h3 {
  margin: 0 0 9px;
  font-size: 16px;
  font-weight: 500;
  color: var(--paper);
  letter-spacing: .02em;
}

.page-about .about-eco__item p {
  font-size: 14.5px;
  line-height: 1.86;
}

.page-about .about-eco__item:hover,
.page-about .about-eco__item:focus-within,
.page-about .about-eco__item:focus-visible {
  transform: translateY(-3px);
  border-color: var(--cyan);
  background: rgba(20, 31, 58, .95);
  outline: none;
}

.page-about .about-eco__item:focus-visible {
  box-shadow: 0 0 0 2px rgba(93, 224, 230, .55);
}

/* cta */
.page-about .about-cta {
  border: 1px solid var(--line);
  padding: clamp(22px, 3.4vw, 38px);
  background: linear-gradient(120deg, rgba(124, 92, 255, .18), rgba(255, 122, 61, .1) 78%, rgba(7, 11, 24, .4));
  box-shadow: var(--shadow-hard);
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: flex-start;
}

.page-about .about-cta p {
  margin: 0;
  color: var(--paper);
  font-size: 16px;
  line-height: 1.75;
  max-width: 26em;
}

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

/* fixed return */
.page-about .about-return {
  position: fixed;
  right: clamp(12px, 3vw, 28px);
  bottom: clamp(12px, 3vw, 28px);
  z-index: 45;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-decoration: none;
  color: var(--ink-900);
  background: var(--orange);
  border: 1px solid rgba(7, 11, 24, .45);
  box-shadow: var(--shadow-hard);
  padding: 9px 14px;
}

.page-about .about-return:hover,
.page-about .about-return:focus-visible {
  background: var(--paper);
  color: var(--ink-900);
}

/* ---------- Media queries ---------- */
@media (min-width: 620px) {
  .page-about .about-facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 780px) {
  .page-about .about-cycle {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .chapter__split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: clamp(24px, 3.4vw, 40px);
  }

  .page-about .about-cta {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 900px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 980px) {
  .page-about .about-body {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 0 clamp(40px, 6vw, 84px);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 104px;
    align-self: start;
    border-bottom: 0;
    border-right: 1px solid var(--line);
    padding: 4px clamp(16px, 2vw, 24px) 0 0;
  }

  .page-about .about-index__label {
    display: block;
  }

  .page-about .about-index ul {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-index li {
    flex: initial;
  }

  .page-about .about-index a {
    border: 0;
    border-top: 1px solid var(--line);
    padding: 10px 0;
    font-size: 14px;
    white-space: normal;
    background: transparent;
  }

  .page-about .about-index a:hover,
  .page-about .about-index a:focus-visible {
    background: transparent;
    border-color: var(--cyan);
  }

  .page-about .about-index__jump {
    display: inline-block;
  }

  .page-about .about-hero__head {
    padding-right: clamp(40px, 6vw, 72px);
  }
}

@media (min-width: 1180px) {
  .page-about .chapter__figure img {
    aspect-ratio: 4 / 3;
  }
}
<<<END>>>