.page-about {
  --about-hair: rgba(244, 241, 234, 0.12);
  --about-soft: rgba(244, 241, 234, 0.05);
  --about-index-top: 76px;
  background: var(--ink);
  color: var(--paper);
  padding-top: clamp(92px, 12vw, 116px);
}

.page-about a {
  color: var(--cyan);
  text-decoration: none;
}

.page-about a:hover,
.page-about a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

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

.page-about .about-hero {
  padding-bottom: clamp(20px, 3vw, 32px);
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(24px, 4vw, 44px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 56px);
  align-items: end;
}

.page-about .about-hero__kicker {
  margin: 0 0 14px;
  font-size: 11.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 0 0 clamp(18px, 2.6vw, 26px);
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(1.9rem, 5.6vw, 4rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  max-width: 17ch;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 46ch;
  font-size: clamp(0.98rem, 1.5vw, 1.1rem);
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-figures {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-figures__item {
  background: var(--panel);
  padding: 18px 16px;
}

.page-about .about-figures__num {
  display: block;
  font-size: clamp(1.35rem, 2.6vw, 1.85rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .about-figures__label {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--muted);
}

.page-about .about-hero__figure {
  margin: clamp(26px, 4vw, 46px) 0 0;
}

/* ---------- chapter index ---------- */

.page-about .about-index {
  position: sticky;
  top: var(--about-index-top);
  z-index: 4;
  margin-top: clamp(28px, 4vw, 52px);
  padding: 12px 0;
  background: rgba(6, 8, 11, 0.88);
  border-top: 1px solid var(--about-hair);
  border-bottom: 1px solid var(--about-hair);
  backdrop-filter: blur(10px);
}

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

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

.page-about .about-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--about-hair);
  border-radius: var(--pill);
  font-size: 13px;
  line-height: 1;
  white-space: nowrap;
  color: var(--muted);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-index__link .mono {
  font-size: 11px;
  color: var(--cyan);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--paper);
  border-color: var(--cyan);
  text-decoration: none;
}

/* ---------- timeline ---------- */

.page-about .about-timeline {
  position: relative;
  padding: clamp(36px, 5vw, 72px) 0 clamp(48px, 7vw, 88px);
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 19px;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--about-hair) 5%, var(--about-hair) 95%, transparent);
}

.page-about .stage {
  position: relative;
  padding-left: 44px;
  margin-bottom: clamp(34px, 5vw, 62px);
}

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

.page-about .stage::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 30px;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  border: 1px solid var(--stage-dot);
  background: radial-gradient(circle at center, var(--stage-dot) 0 3.5px, var(--ink) 4px);
  box-shadow: 0 0 0 5px var(--ink);
}

.page-about .stage--teal {
  --stage-accent: var(--teal);
  --stage-dot: var(--cyan);
}

.page-about .stage--wine {
  --stage-accent: var(--wine);
  --stage-dot: var(--orange);
}

.page-about .stage--violet {
  --stage-accent: var(--violet);
  --stage-dot: var(--lime);
}

.page-about .stage--paper {
  --stage-accent: var(--paper);
  --stage-dot: var(--orange);
}

/* ---------- stage banner ---------- */

.page-about .stage__banner {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-lg);
  padding: clamp(26px, 4vw, 48px) clamp(22px, 4vw, 48px);
  background: var(--stage-accent);
}

.page-about .stage__banner::after {
  content: "";
  position: absolute;
  top: auto;
  right: -12%;
  bottom: -70%;
  left: 36%;
  height: 190%;
  background: radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.1), transparent 62%);
  pointer-events: none;
}

.page-about .stage__banner-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(12px, 2.4vw, 30px);
}

.page-about .stage__num {
  display: block;
  font-size: clamp(1.5rem, 3vw, 2.3rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: rgba(244, 241, 234, 0.55);
}

.page-about .stage__label {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(244, 241, 234, 0.75);
}

.page-about .stage__title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(1.4rem, 3.4vw, 2.4rem);
  line-height: 1.22;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .stage__conclusion {
  margin: 14px 0 0;
  max-width: 44ch;
  font-size: clamp(0.92rem, 1.4vw, 1.02rem);
  line-height: 1.7;
  color: rgba(244, 241, 234, 0.84);
}

.page-about .stage--paper .stage__num {
  color: rgba(6, 8, 11, 0.32);
}

.page-about .stage--paper .stage__label {
  color: rgba(6, 8, 11, 0.58);
}

.page-about .stage--paper .stage__title {
  color: var(--ink);
}

.page-about .stage--paper .stage__conclusion {
  color: rgba(6, 8, 11, 0.72);
}

.page-about .stage--paper .stage__banner::after {
  background: radial-gradient(circle at 50% 50%, rgba(0, 229, 255, 0.22), transparent 64%);
}

/* ---------- stage detail ---------- */

.page-about .stage__detail {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 34px);
  padding-top: clamp(24px, 3.4vw, 42px);
  padding-left: clamp(2px, 1vw, 12px);
}

.page-about .stage__prose p {
  margin: 0 0 1em;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted);
}

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

.page-about .stage__prose a {
  color: var(--cyan);
}

.page-about .about-aside-title {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-about .about-aside-note {
  margin: 18px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- lists ---------- */

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

.page-about .about-list li {
  position: relative;
  padding: 12px 0 12px 20px;
  border-bottom: 1px solid var(--about-hair);
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--paper);
}

.page-about .about-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 20px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
}

.page-about .about-list--tight li {
  padding-top: 10px;
  padding-bottom: 10px;
  font-size: 13.8px;
}

.page-about .about-list--tight li::before {
  top: 18px;
  background: var(--orange);
}

/* ---------- version block ---------- */

.page-about .about-version {
  border: 1px solid var(--about-hair);
  border-radius: var(--r-md);
  background: var(--panel);
  padding: clamp(18px, 2.4vw, 24px);
}

.page-about .about-version__code {
  display: block;
  margin-bottom: 16px;
  font-size: clamp(1.15rem, 2.4vw, 1.55rem);
  letter-spacing: 0.05em;
  color: var(--orange);
}

.page-about .about-version__parts {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 18px;
  padding: 0;
}

.page-about .about-version__parts li {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 6px 12px;
  border: 1px solid var(--about-hair);
  border-radius: var(--pill);
  font-size: 12px;
  color: var(--muted);
}

.page-about .about-version__parts .mono {
  font-size: 13px;
  color: var(--cyan);
}

.page-about .about-version__link {
  margin: 16px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
}

/* ---------- chips ---------- */

.page-about .about-chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
}

.page-about .about-chips li {
  padding: 7px 13px;
  border: 1px solid var(--about-hair);
  border-radius: var(--pill);
  background: var(--about-soft);
  font-size: 12.5px;
  line-height: 1.4;
  color: var(--paper);
}

/* ---------- crew ---------- */

.page-about .about-crew {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-crew li {
  background: var(--panel);
  padding: 16px 14px;
}

.page-about .about-crew__n {
  display: block;
  font-size: 1.3rem;
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .about-crew__t {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  line-height: 1.4;
  color: var(--muted);
}

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

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

.page-about .about-fig--full {
  margin: clamp(4px, 1vw, 10px) 0 0;
}

/* ---------- ledger ---------- */

.page-about .about-ledger {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-ledger li {
  background: var(--panel);
  padding: 16px;
}

.page-about .about-ledger__n {
  display: block;
  font-size: 1.15rem;
  line-height: 1.1;
  color: var(--orange);
}

.page-about .about-ledger__t {
  display: block;
  margin-top: 7px;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--muted);
}

/* ---------- next steps ---------- */

.page-about .about-next {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .about-next__card {
  padding: 22px 20px;
  border: 1px solid var(--about-hair);
  border-radius: var(--r-md);
  background: var(--panel);
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .about-next__card:hover {
  transform: translateY(-4px);
  border-color: var(--cyan);
}

.page-about .about-next__idx {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--cyan);
}

.page-about .about-next__card h3 {
  margin: 0 0 10px;
  font-family: var(--sans);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}

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

/* ---------- cta ---------- */

.page-about .about-cta {
  padding: clamp(36px, 5vw, 72px) 0 clamp(56px, 7vw, 96px);
}

.page-about .about-cta__panel {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: linear-gradient(135deg, var(--teal) 0%, #0a1a1c 62%, var(--ink) 100%);
  padding: clamp(28px, 4.5vw, 56px);
}

.page-about .about-cta__title {
  margin: 0 0 14px;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(1.35rem, 3.2vw, 2.1rem);
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(244, 241, 234, 0.78);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 28px);
}

.page-about .about-cta__actions .btn {
  text-decoration: none;
}

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

@media (min-width: 560px) {
  .page-about .about-ledger {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 780px) {
  .page-about .stage__banner-inner {
    grid-template-columns: 104px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .stage:nth-of-type(even) .stage__banner-inner {
    grid-template-columns: minmax(0, 1fr) 104px;
  }

  .page-about .stage:nth-of-type(even) .stage__num {
    order: 2;
    justify-self: end;
    text-align: right;
  }

  .page-about .stage:nth-of-type(even) .stage__banner-text {
    order: 1;
  }

  .page-about .about-next {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }
}

@media (min-width: 860px) {
  .page-about .stage {
    padding-left: 76px;
  }

  .page-about .about-timeline::before {
    left: 27px;
  }

  .page-about .stage::before {
    left: 19px;
    top: 34px;
  }

  .page-about .stage__detail {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(28px, 3.5vw, 48px);
  }

  .page-about .stage__detail--full {
    grid-template-columns: 1fr;
  }

  .page-about .stage__detail--media {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
    align-items: start;
  }

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

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

@media (min-width: 960px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

  .page-about .about-index__list {
    overflow-x: visible;
    flex-wrap: wrap;
    gap: 10px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-crew {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .page-about .about-next__card:hover {
    transform: none;
  }
}
<<<END>>>