.page-about {
  --about-rail-w: 260px;
  --about-gap: clamp(20px, 3vw, 32px);
  --about-body: 38em;
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-body);
}

.page-about .about-shell {
  padding-block: clamp(40px, 6vw, 80px) clamp(48px, 8vw, 96px);
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  display: flex;
  align-items: flex-end;
  min-height: clamp(440px, 66vh, 660px);
  padding-block: clamp(72px, 12vw, 128px) clamp(36px, 6vw, 64px);
  overflow: hidden;
  background: var(--ink-900);
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
}

.page-about .about-hero__scrim {
  position: absolute;
  inset: 0;
  z-index: -1;
  display: block;
  background:
    linear-gradient(180deg, rgba(7, 14, 26, 0.88) 0%, rgba(7, 14, 26, 0.52) 46%, var(--ink-900) 100%),
    radial-gradient(120% 90% at 10% 18%, rgba(53, 230, 218, 0.14), transparent 62%);
}

.page-about .about-hero__inner {
  position: relative;
  width: 100%;
}

.page-about .about-hero__crumb {
  margin-bottom: clamp(20px, 4vw, 36px);
}

.page-about .about-hero__eyebrow {
  margin: 0 0 14px;
  color: var(--cyan);
  font-size: 12px;
  letter-spacing: 0.24em;
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(40px, 8vw, 88px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero__lead {
  max-width: 40em;
  margin: clamp(20px, 3vw, 30px) 0 0;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.9;
  color: var(--ash);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 20px;
  max-width: 760px;
  margin: clamp(28px, 5vw, 44px) 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(24px, 3.4vw, 34px);
  line-height: 1.05;
  color: var(--paper);
}

.page-about .about-stat__num i {
  font-style: normal;
  margin-inline: 2px;
  color: var(--cyan);
  font-size: 0.62em;
}

.page-about .about-stat__label {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--ash);
}

.page-about .about-hero__annotation {
  display: none;
  position: absolute;
  right: clamp(12px, 2vw, 28px);
  top: 50%;
  transform: translateY(-50%) rotate(90deg);
  transform-origin: center;
  color: rgba(147, 163, 184, 0.68);
  white-space: nowrap;
}

/* ---------- Layout ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
}

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

/* ---------- Rail ---------- */
.page-about .about-rail {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 16px;
  background: var(--ink-800);
  border-left: 2px solid var(--cyan-line);
  clip-path: var(--cut-sm);
}

.page-about .about-rail__title {
  margin: 0;
  color: var(--ash);
  font-size: 11px;
  letter-spacing: 0.22em;
}

.page-about .about-rail__title--second {
  margin-top: 8px;
  color: var(--cyan);
}

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

.page-about .about-rail__node a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px 6px 8px;
  color: var(--ash);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-decoration: none;
  border: 1px solid var(--line);
  background: transparent;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .about-rail__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 1px solid var(--mute);
  box-shadow: inset 0 0 0 2px var(--ink-800);
  background: var(--mute);
  flex: none;
}

.page-about .about-rail__node[data-state="active"] a {
  color: var(--paper);
  border-color: var(--amber-line);
  background: rgba(255, 162, 58, 0.08);
}

.page-about .about-rail__node[data-state="active"] .about-rail__dot {
  border-color: var(--amber);
  background: var(--amber);
  box-shadow: inset 0 0 0 2px var(--ink-800), 0 0 0 3px rgba(255, 162, 58, 0.18);
}

.page-about .about-rail__node a:hover,
.page-about .about-rail__node a:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan-line);
}

.page-about .about-rail__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
}

.page-about .about-rail__nav a {
  color: var(--ash);
  font-size: 13px;
  line-height: 1.8;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

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

.page-about .about-rail__node a:focus-visible,
.page-about .about-rail__nav a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- Section base ---------- */
.page-about .about-section {
  position: relative;
  padding-block: clamp(36px, 5vw, 56px);
}

.page-about .about-section__head {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-about .about-section__no {
  writing-mode: vertical-rl;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--mute);
  padding-top: 4px;
}

.page-about .about-section__headtext h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-section__sub {
  margin: 10px 0 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ash);
}

.page-about .about-prose {
  max-width: var(--about-body);
}

.page-about .about-prose p {
  margin: 0 0 1.2em;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(234, 240, 248, 0.88);
}

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

/* ---------- Note ---------- */
.page-about .about-note {
  margin-top: 26px;
  padding: 18px 20px;
  background: var(--teal-950);
  border-left: 2px solid var(--cyan);
  clip-path: var(--cut-sm);
  max-width: 44em;
}

.page-about .about-note__k {
  margin: 0 0 8px;
  color: var(--cyan);
  font-size: 12px;
  letter-spacing: 0.16em;
}

.page-about .about-note__v {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(234, 240, 248, 0.9);
}

/* ---------- Divider ---------- */
.page-about .about-divider {
  height: 1px;
  margin-block: clamp(8px, 2vw, 18px);
  background: linear-gradient(90deg, var(--cyan-line), rgba(169, 155, 209, 0.28) 46%, transparent 88%);
  transform: skewY(-0.6deg);
}

/* ---------- Method ---------- */
.page-about .about-method {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .about-step {
  padding: 22px 20px 24px;
  clip-path: var(--cut);
  border-top: 1px solid var(--line);
  background: var(--ink-800);
}

.page-about .about-step--a {
  background: var(--ink-800);
  border-top-color: var(--cyan-line);
}

.page-about .about-step--b {
  background: var(--ink-700);
  border-top-color: var(--line);
}

.page-about .about-step--c {
  background: var(--teal-950);
  border-top-color: var(--amber-line);
}

.page-about .about-step__no {
  margin: 0 0 10px;
  color: var(--cyan);
  font-size: 12px;
  letter-spacing: 0.18em;
}

.page-about .about-step--c .about-step__no {
  color: var(--amber);
}

.page-about .about-step__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-step p:not(.mono-label) {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.9;
  color: rgba(234, 240, 248, 0.82);
}

.page-about .about-figure {
  margin: 26px 0 0;
  max-width: 100%;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  clip-path: var(--cut);
  filter: saturate(0.9) brightness(0.9);
}

.page-about .about-figure__cap {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--ash);
  letter-spacing: 0.02em;
}

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

.page-about .about-role {
  background: var(--ink-800);
  clip-path: var(--cut-sm);
  border-left: 2px solid var(--cyan-line);
}

.page-about .about-role__sum {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

.page-about .about-role__sum::-webkit-details-marker {
  display: none;
}

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

.page-about .about-role__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(30px, 4.4vw, 46px);
  line-height: 1;
  letter-spacing: -0.02em;
  min-width: 1.6em;
}

.page-about .about-role__num--amber { color: var(--amber); }
.page-about .about-role__num--cyan { color: var(--cyan); }
.page-about .about-role__num--mute { color: var(--mute); }
.page-about .about-role__num--ash { color: var(--ash); }

.page-about .about-role__name {
  flex: 1;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  color: var(--paper);
}

.page-about .about-role__hint {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ash);
}

.page-about .about-role[open] .about-role__hint {
  color: var(--amber);
}

.page-about .about-role__body {
  padding: 0 18px 18px;
}

.page-about .about-role__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.9;
  color: rgba(234, 240, 248, 0.84);
  border-top: 1px solid var(--line-soft);
  padding-top: 14px;
}

/* ---------- Stages ---------- */
.page-about .about-section--stages {
  overflow: hidden;
  padding-block: clamp(40px, 6vw, 64px);
  background: var(--ink-800);
  clip-path: var(--cut);
  padding-inline: clamp(18px, 3vw, 32px);
}

.page-about .about-stages__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.14;
  z-index: 0;
  pointer-events: none;
}

.page-about .about-section--stages > .about-section__head,
.page-about .about-section--stages > .about-stages {
  position: relative;
  z-index: 1;
}

.page-about .about-stages {
  margin: 0;
  padding: 0 0 0 34px;
  list-style: none;
  position: relative;
}

.page-about .about-stages::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 6px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--mute), rgba(169, 155, 209, 0.2));
}

.page-about .about-stage {
  position: relative;
  padding-bottom: clamp(24px, 4vw, 36px);
}

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

.page-about .about-stage__dot {
  position: absolute;
  left: -34px;
  top: 6px;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  border: 1px solid var(--mute);
  background: var(--ink-800);
}

.page-about .about-stage__dot::after {
  content: "";
  position: absolute;
  inset: 4px;
  border-radius: 50%;
  background: var(--mute);
}

.page-about .about-stage--current .about-stage__dot {
  border-color: var(--amber);
  box-shadow: 0 0 0 4px rgba(255, 162, 58, 0.14);
}

.page-about .about-stage--current .about-stage__dot::after {
  background: var(--amber);
}

.page-about .about-stage__tag {
  margin: 0 0 8px;
  color: var(--mute);
  font-size: 11px;
  letter-spacing: 0.2em;
}

.page-about .about-stage--current .about-stage__tag {
  color: var(--amber);
}

.page-about .about-stage__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 2.2vw, 23px);
  line-height: 1.4;
  color: var(--paper);
}

.page-about .about-stage p:not(.mono-label) {
  margin: 0;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.9;
  color: rgba(234, 240, 248, 0.84);
}

/* ---------- Ecosystem ---------- */
.page-about .about-eco {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.page-about .about-eco__text p {
  margin: 0 0 1.1em;
  font-size: 15.5px;
  line-height: 1.9;
  color: rgba(234, 240, 248, 0.86);
}

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

.page-about .about-eco__side {
  padding: 20px;
  background: var(--ink-700);
  clip-path: var(--cut);
  border-bottom: 2px solid var(--amber-line);
}

.page-about .about-eco__num {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(44px, 7vw, 64px);
  line-height: 1;
  color: var(--amber);
  letter-spacing: -0.02em;
}

.page-about .about-eco__cap {
  margin: 10px 0 16px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--ash);
}

.page-about .about-eco__link {
  display: inline-block;
  color: var(--cyan);
  font-size: 13.5px;
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-line);
  padding-bottom: 2px;
}

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

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

/* ---------- Standards ---------- */
.page-about .about-section--start {
  padding-top: clamp(28px, 4vw, 44px);
}

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

.page-about .about-flow__item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 14px 16px;
  background: var(--ink-800);
}

.page-about .about-flow__k {
  color: var(--mute);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.page-about .about-flow__v {
  font-size: 14px;
  color: var(--paper);
}

.page-about .about-start {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  padding: 24px 20px;
  background: var(--amber-950);
  clip-path: var(--cut);
  border-left: 2px solid var(--amber);
}

.page-about .about-start__copy p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.9;
  color: rgba(234, 240, 248, 0.9);
}

.page-about .about-start__meta {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--ash);
}

.page-about .about-start__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 16px;
}

.page-about .about-start__link {
  color: var(--paper);
  font-size: 13.5px;
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-line);
  padding-bottom: 2px;
}

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

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

/* ---------- Media queries ---------- */
@media (min-width: 620px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-flow {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-figure img {
    aspect-ratio: 21 / 9;
  }
}

@media (min-width: 780px) {
  .page-about .about-method {
    grid-template-columns: 1.15fr 1fr 1.2fr;
    align-items: start;
  }

  .page-about .about-step--c {
    margin-top: 24px;
  }

  .page-about .about-eco {
    grid-template-columns: minmax(0, 1fr) 220px;
    gap: 32px;
  }

  .page-about .about-start {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 28px 26px;
  }

  .page-about .about-start__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1000px) {
  .page-about .about-hero__annotation {
    display: block;
  }

  .page-about .about-layout {
    grid-template-columns: minmax(0, 1fr) var(--about-rail-w);
    gap: clamp(32px, 4vw, 56px);
  }

  .page-about .about-rail {
    grid-column: 2;
    grid-row: 1;
    position: sticky;
    top: calc(var(--header-h-compact) + 24px);
    align-self: start;
    padding: 20px 18px;
  }

  .page-about .about-main {
    grid-column: 1;
    grid-row: 1;
  }

  .page-about .about-rail__timeline {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
    padding-left: 0;
  }

  .page-about .about-rail__node a {
    display: grid;
    grid-template-columns: 12px minmax(0, 1fr);
    grid-template-rows: auto auto;
    column-gap: 10px;
    row-gap: 2px;
    width: 100%;
    padding: 8px 0 8px 0;
    border: 0;
    background: transparent;
    position: relative;
  }

  .page-about .about-rail__node {
    position: relative;
  }

  .page-about .about-rail__node::before {
    content: "";
    position: absolute;
    left: 5px;
    top: 0;
    bottom: 0;
    width: 1px;
    background: rgba(169, 155, 209, 0.3);
  }

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

  .page-about .about-rail__node:last-child::before {
    bottom: calc(100% - 12px);
  }

  .page-about .about-rail__dot {
    grid-row: 1 / 3;
    align-self: center;
    width: 11px;
    height: 11px;
    background: var(--ink-800);
    box-shadow: inset 0 0 0 2px var(--ink-800);
  }

  .page-about .about-rail__k {
    font-size: 11px;
    letter-spacing: 0.14em;
    color: var(--ash);
  }

  .page-about .about-rail__v {
    font-family: var(--font-body);
    font-size: 13px;
    color: rgba(234, 240, 248, 0.86);
  }

  .page-about .about-rail__node[data-state="active"] a {
    background: transparent;
  }

  .page-about .about-rail__nav {
    flex-direction: column;
    gap: 2px;
  }

  .page-about .about-rail__nav a {
    display: block;
    padding-block: 4px;
  }

  .page-about .about-figure img {
    aspect-ratio: 21 / 8;
  }
}

@media (min-width: 1200px) {
  .page-about .about-section__head {
    grid-template-columns: 24px minmax(0, 1fr);
    gap: 18px;
  }

  .page-about .about-prose p {
    font-size: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__node a,
  .page-about .about-rail__nav a,
  .page-about .about-eco__link {
    transition: none;
  }
}
<<<PAGE_CSS_DONE>>>