.page-about {
  --ab-rail-w: 220px;
  --ab-gap: clamp(32px, 4vw, 64px);
  background: var(--ne-ink);
  color: var(--ne-cream);
}

.page-about .ab-shell {
  width: 100%;
  max-width: var(--ne-max);
  margin-inline: auto;
  padding-inline: var(--ne-gut);
}

/* ---------- Hero ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(64px, 10vw, 120px) clamp(56px, 8vw, 96px);
  border-bottom: 1px solid var(--ne-ink-3);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(31, 92, 75, 0.32) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(31, 92, 75, 0.32) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 88%);
  mask-image: linear-gradient(to bottom, #000 0%, transparent 88%);
  pointer-events: none;
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  top: -10%;
  width: 42vw;
  height: 42vw;
  max-width: 520px;
  max-height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(59, 242, 200, 0.14), transparent 68%);
  pointer-events: none;
}

.page-about .ab-hero .ne-shell {
  position: relative;
  z-index: 1;
}

.page-about .ab-hero .ne-crumbs {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .ab-hero__title {
  margin: 0 0 clamp(20px, 2.5vw, 28px);
  font-family: var(--ne-sans);
  font-size: clamp(38px, 8.4vw, 94px);
  font-weight: 900;
  font-stretch: condensed;
  line-height: 0.98;
  letter-spacing: -0.03em;
  color: var(--ne-cream);
}

.page-about .ab-hero__title-accent {
  display: block;
  color: var(--ne-cyan);
}

.page-about .ab-hero__lead {
  margin: 0 0 clamp(24px, 3vw, 36px);
  max-width: 58ch;
  font-size: clamp(15px, 1.9vw, 18px);
  line-height: 1.8;
  color: var(--ne-mist);
}

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

.page-about .ab-hero__panel {
  align-self: end;
  border: 1px solid var(--ne-ink-3);
  background: rgba(18, 58, 49, 0.62);
  padding: 8px clamp(18px, 2.4vw, 26px);
}

.page-about .ab-hero__panel-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: clamp(14px, 2vw, 18px) 0;
  border-bottom: 1px solid var(--ne-ink-3);
}

.page-about .ab-hero__panel-row:last-child {
  border-bottom: 0;
}

.page-about .ab-hero__panel-num {
  font-size: clamp(24px, 3.2vw, 32px);
  font-weight: 700;
  color: var(--ne-cyan);
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.page-about .ab-hero__panel-key {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--ne-mist);
  text-align: right;
}

/* ---------- Layout with rail ---------- */
.page-about .ab-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  padding-block: clamp(48px, 7vw, 88px);
}

.page-about .ab-rail {
  display: none;
}

.page-about .ab-content {
  display: flex;
  flex-direction: column;
  gap: clamp(64px, 9vw, 132px);
  min-width: 0;
}

/* ---------- Node base ---------- */
.page-about .ab-node {
  position: relative;
  scroll-margin-top: 120px;
  min-width: 0;
}

.page-about .ab-node__head {
  position: relative;
  margin-bottom: clamp(24px, 3.4vw, 36px);
}

.page-about .ab-node__index {
  position: relative;
  z-index: 1;
  display: inline-block;
  font-family: var(--ne-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--ne-cyan-deep);
  text-transform: uppercase;
  margin-bottom: 14px;
}

.page-about .ab-node__title {
  position: relative;
  z-index: 1;
  margin: 0 0 16px;
  max-width: 20ch;
  font-family: var(--ne-sans);
  font-size: clamp(26px, 4vw, 46px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--ne-cream);
}

.page-about .ab-node__lead {
  position: relative;
  z-index: 1;
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ne-mist);
}

.page-about .ab-year {
  position: absolute;
  top: -0.22em;
  right: 0;
  z-index: 0;
  font-family: var(--ne-mono);
  font-size: clamp(64px, 13vw, 148px);
  font-weight: 200;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--ne-cyan);
  opacity: 0.1;
  pointer-events: none;
  user-select: none;
}

.page-about .ab-p {
  margin: 0 0 1.2em;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ne-mist);
}

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

.page-about .ab-p--after {
  margin-top: clamp(24px, 3vw, 36px);
  max-width: 72ch;
}

/* ---------- Origin ---------- */
.page-about .ab-origin__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

/* ---------- Media ---------- */
.page-about .ab-media {
  position: relative;
  margin: 0;
  border: 1px solid var(--ne-ink-3);
  background: var(--ne-ink-2);
  overflow: hidden;
}

.page-about .ab-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1.5;
  object-fit: cover;
  filter: saturate(0.86) contrast(1.05);
}

.page-about .ab-media--std img {
  aspect-ratio: 1.5;
}

.page-about .ab-media--wide img {
  aspect-ratio: 1.556;
}

.page-about .ab-media--tall img {
  aspect-ratio: 0.75;
}

.page-about .ab-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    0deg,
    rgba(10, 31, 26, 0.16) 0 1px,
    transparent 1px 4px
  );
  pointer-events: none;
}

.page-about .ab-media__cap {
  position: relative;
  z-index: 1;
  padding: 12px 14px;
  font-size: 12px;
  line-height: 1.65;
  letter-spacing: 0.04em;
  color: var(--ne-mist);
  border-top: 1px solid var(--ne-ink-3);
  background: var(--ne-ink);
}

/* ---------- Cream block ---------- */
.page-about .ab-node--cream {
  background: var(--ne-cream);
  color: var(--ne-brown);
  padding: clamp(28px, 4vw, 52px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 40px), calc(100% - 40px) 100%, 0 100%);
  border: 1px solid var(--ne-paper);
}

.page-about .ab-node--cream .ab-node__index {
  color: var(--ne-orange);
}

.page-about .ab-node--cream .ab-node__title {
  color: var(--ne-brown);
}

.page-about .ab-node--cream .ab-node__lead {
  color: #5a5248;
}

.page-about .ab-node--cream .ab-year {
  color: var(--ne-orange);
  opacity: 0.16;
}

.page-about .ab-cream__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.4vw, 40px);
  align-items: start;
}

.page-about .ab-cream__aside {
  border-color: var(--ne-paper);
  background: var(--ne-paper);
}

.page-about .ab-cream__aside .ab-media__cap {
  background: var(--ne-cream);
  border-top-color: var(--ne-paper);
  color: #5a5248;
}

/* ---------- Version cards ---------- */
.page-about .ab-ver-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: clamp(20px, 2.6vw, 30px);
}

.page-about .ab-vcard {
  position: relative;
  padding: 18px 20px 20px;
  background: #fcf7ec;
  border: 1px solid var(--ne-paper);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
  transition: transform 0.3s var(--ne-ease), box-shadow 0.3s var(--ne-ease), background 0.3s var(--ne-ease);
}

.page-about .ab-vcard:hover,
.page-about .ab-vcard:focus-within {
  transform: translateY(-3px);
  background: #fffdf7;
  box-shadow: 0 16px 34px -20px rgba(26, 23, 18, 0.4);
}

.page-about .ab-vcard__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--ne-paper);
}

.page-about .ab-vcard__ver {
  font-size: 20px;
  font-weight: 700;
  color: var(--ne-brown);
  letter-spacing: 0.02em;
}

.page-about .ab-vcard__year {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--ne-orange);
  white-space: nowrap;
}

.page-about .ab-vcard__name {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--ne-brown);
}

.page-about .ab-vcard__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: #5a5248;
}

.page-about .ab-vcard__more {
  margin: 0;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 13px;
  line-height: 1.7;
  color: #6f6558;
  transition: max-height 0.35s var(--ne-ease), opacity 0.3s var(--ne-ease), margin-top 0.3s var(--ne-ease);
}

.page-about .ab-vcard:hover .ab-vcard__more,
.page-about .ab-vcard:focus-within .ab-vcard__more {
  max-height: 120px;
  opacity: 1;
  margin-top: 10px;
}

/* ---------- Steps ---------- */
.page-about .ab-steps {
  list-style: none;
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding: 0;
  border-top: 1px solid var(--ne-ink-3);
}

.page-about .ab-step {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 12px;
  padding: 18px 0;
  border-bottom: 1px solid var(--ne-ink-3);
}

.page-about .ab-step__no {
  font-family: var(--ne-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ne-cyan);
  padding-top: 4px;
}

.page-about .ab-step__title {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--ne-cream);
}

.page-about .ab-step__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ne-mist);
}

/* ---------- Stats ---------- */
.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--ne-ink-3);
  border-left: 1px solid var(--ne-ink-3);
}

.page-about .ab-stat {
  padding: clamp(16px, 2.4vw, 24px) clamp(12px, 1.8vw, 20px);
  border-right: 1px solid var(--ne-ink-3);
  border-bottom: 1px solid var(--ne-ink-3);
}

.page-about .ab-stat__num {
  display: block;
  font-family: var(--ne-mono);
  font-size: clamp(28px, 4.8vw, 48px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ne-cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-stat__label {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.1em;
  color: var(--ne-mist);
}

/* ---------- Roles ---------- */
.page-about .ab-roles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-about .ab-role {
  position: relative;
  padding: 22px 22px 24px;
  background: var(--ne-ink-2);
  border: 1px solid var(--ne-ink-3);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  transition: border-color 0.3s var(--ne-ease), transform 0.3s var(--ne-ease);
}

.page-about .ab-role:hover,
.page-about .ab-role:focus-within {
  border-color: var(--ne-cyan-deep);
  transform: translateY(-2px);
}

.page-about .ab-role__no {
  display: block;
  font-family: var(--ne-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--ne-cyan-deep);
  margin-bottom: 10px;
}

.page-about .ab-role__name {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--ne-cream);
}

.page-about .ab-role__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--ne-mist);
}

/* ---------- Next ---------- */
.page-about .ab-next {
  position: relative;
  border-top: 1px solid var(--ne-ink-3);
  background: linear-gradient(180deg, #061712 0%, #04100c 100%);
  padding-block: clamp(56px, 8vw, 104px) clamp(64px, 9vw, 120px);
}

.page-about .ab-next::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--ne-cyan), transparent);
}

.page-about .ab-next__inner {
  width: 100%;
  max-width: var(--ne-max);
  margin-inline: auto;
  padding-inline: var(--ne-gut);
}

.page-about .ab-next__title {
  margin: 16px 0 20px;
  max-width: 24ch;
  font-family: var(--ne-sans);
  font-size: clamp(26px, 4vw, 44px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--ne-cream);
}

.page-about .ab-next__lead {
  margin: 0 0 clamp(24px, 3vw, 36px);
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ne-mist);
}

.page-about .ab-next__list {
  list-style: none;
  margin: 0 0 clamp(28px, 3.4vw, 40px);
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--ne-ink-3);
}

.page-about .ab-next__item {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--ne-ink-3);
}

.page-about .ab-next__no {
  font-family: var(--ne-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ne-orange);
  padding-top: 3px;
}

.page-about .ab-next__text {
  font-size: 15px;
  line-height: 1.72;
  color: var(--ne-mist);
}

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

/* ---------- Reveal / reduced motion ---------- */
.page-about .ab-node--cream.is-revealed {
  animation: ab-slide-in 0.7s var(--ne-ease) both;
}

@keyframes ab-slide-in {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- Responsive ---------- */
@media (min-width: 720px) {
  .page-about .ab-ver-grid {
    grid-template-columns: 1fr 1fr;
  }

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

  .page-about .ab-roles {
    grid-template-columns: 1fr 1fr;
  }

  .page-about .ab-next__list {
    grid-template-columns: 1fr 1fr;
    column-gap: 32px;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-about .ab-origin__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(32px, 4vw, 56px);
  }
}

@media (min-width: 1000px) {
  .page-about .ab-layout {
    grid-template-columns: var(--ab-rail-w) minmax(0, 1fr);
    gap: var(--ab-gap);
  }

  .page-about .ab-rail {
    display: block;
    align-self: start;
    position: sticky;
    top: 112px;
  }
}

.page-about .ab-rail__inner {
  border: 1px solid var(--ne-ink-3);
  background: rgba(18, 58, 49, 0.55);
  padding: 18px 16px 20px;
}

.page-about .ab-rail__title {
  margin: 0 0 16px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--ne-mist);
  text-transform: uppercase;
}

.page-about .ab-rail__list {
  list-style: none;
  position: relative;
  margin: 0;
  padding: 0 0 0 22px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .ab-rail__list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: var(--ne-ink-3);
}

.page-about .ab-rail__link {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: 10px;
  padding: 9px 0;
  text-decoration: none;
  color: var(--ne-mist);
  transition: color 0.3s var(--ne-ease);
}

.page-about .ab-rail__dot {
  position: absolute;
  left: -22px;
  top: 15px;
  width: 11px;
  height: 11px;
  border: 1px solid var(--ne-ink-3);
  background: var(--ne-ink);
  transform: rotate(45deg);
  transition: background 0.3s var(--ne-ease), border-color 0.3s var(--ne-ease);
}

.page-about .ab-rail__year {
  font-family: var(--ne-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--ne-cyan-deep);
  white-space: nowrap;
}

.page-about .ab-rail__label {
  font-size: 13px;
  letter-spacing: 0.06em;
}

.page-about .ab-rail__link:hover,
.page-about .ab-rail__link:focus-visible {
  color: var(--ne-cyan);
}

.page-about .ab-rail__link:hover .ab-rail__dot,
.page-about .ab-rail__link:focus-visible .ab-rail__dot {
  background: var(--ne-orange);
  border-color: var(--ne-orange);
}

.page-about .ab-rail__link--current {
  color: var(--ne-cyan);
}

.page-about .ab-rail__link--current .ab-rail__dot {
  background: var(--ne-orange);
  border-color: var(--ne-orange);
}

@media (min-width: 1180px) {
  .page-about .ab-cream__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 0.9fr);
  }
}

@media (hover: none) {
  .page-about .ab-vcard__more {
    max-height: none;
    opacity: 1;
    margin-top: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-node--cream.is-revealed {
    animation: none;
  }

  .page-about .ab-vcard,
  .page-about .ab-role,
  .page-about .ab-vcard__more {
    transition: none;
  }

  .page-about .ab-vcard:hover,
  .page-about .ab-role:hover {
    transform: none;
  }
}
<<<END>>>