.page-about {
  --about-rail: 186px;
  --about-gap: clamp(20px, 3.4vw, 44px);
  --about-pad: clamp(22px, 4vw, 44px);
  color: var(--mist);
  padding-bottom: clamp(40px, 7vw, 88px);
}

.page-about .about-crumb {
  padding-top: clamp(16px, 3vw, 28px);
}

.page-about .about-hero {
  padding-top: clamp(22px, 4vw, 40px);
  padding-bottom: clamp(24px, 4vw, 44px);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 7vw, 4.1rem);
  line-height: 1.04;
  letter-spacing: 0.03em;
  margin: 10px 0 20px;
  color: var(--mist);
  text-wrap: balance;
}

.page-about .about-hero__body {
  display: grid;
  gap: 14px;
  max-width: 62ch;
}

.page-about .about-hero__lede {
  font-family: var(--font-body);
  font-size: clamp(1rem, 1.6vw, 1.14rem);
  line-height: 1.85;
  margin: 0;
  color: var(--mist);
}

.page-about .about-hero__sub {
  font-family: var(--font-editorial);
  font-size: 0.94rem;
  line-height: 1.9;
  margin: 0;
  color: var(--slate);
  padding-left: 14px;
  border-left: 2px solid var(--line-strong);
}

.page-about .about-hero__stats {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 16px 14px 18px;
  background: var(--ink-800);
  min-width: 0;
  border-top: 2px solid transparent;
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .about-stat:hover,
.page-about .about-stat:focus-within {
  border-top-color: var(--cyan);
  background: var(--ink-700);
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.4vw, 2.1rem);
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .about-stat__label {
  font-family: var(--font-body);
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .about-stat__note {
  font-size: 0.76rem;
  line-height: 1.65;
  color: var(--slate);
}

.page-about .about-banner {
  margin: 0 auto clamp(34px, 6vw, 68px);
}

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

.page-about .about-banner img {
  aspect-ratio: 3 / 2;
  border: 1px solid var(--line);
  filter: saturate(1.05) contrast(1.04);
}

.page-about .media-caption {
  font-family: var(--font-editorial);
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--slate);
  margin-top: 10px;
  padding-left: 12px;
  border-left: 2px solid var(--cyan-soft);
}

.page-about .about-section {
  padding: clamp(30px, 5vw, 56px) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-section--solid {
  background: linear-gradient(180deg, rgba(0, 229, 199, 0.05), rgba(0, 229, 199, 0));
}

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

.page-about .about-rail {
  min-width: 0;
  padding-left: 14px;
  border-left: 2px solid var(--line-strong);
}

.page-about .about-rail__year {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 1.9rem);
  letter-spacing: 0.04em;
  color: var(--orange);
  margin: 0 0 8px;
  line-height: 1;
}

.page-about .about-rail__note {
  font-family: var(--font-editorial);
  font-size: 0.82rem;
  line-height: 1.8;
  color: var(--slate);
  margin: 0;
}

.page-about .about-rail__tag {
  display: inline-block;
  margin: 12px 0 0;
  padding: 4px 10px;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--violet);
  border: 1px solid rgba(123, 77, 255, 0.5);
  background: rgba(123, 77, 255, 0.1);
}

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

.page-about .about-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.35rem, 3.2vw, 2.05rem);
  line-height: 1.3;
  letter-spacing: 0.03em;
  color: var(--mist);
  margin: 0 0 18px;
}

.page-about .about-body p {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.9;
  margin: 0 0 15px;
  color: var(--mist);
}

.page-about .about-tail {
  color: var(--slate);
  font-size: 0.92rem;
  padding-left: 14px;
  border-left: 2px solid var(--cyan-soft);
  margin-top: 20px;
}

.page-about .about-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 199, 0.4);
  transition: border-color 0.16s var(--ease), color 0.16s var(--ease);
}

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

.page-about .about-process {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: 26px;
}

.page-about .process-step {
  position: relative;
  min-width: 0;
  padding: 18px 18px 18px 20px;
  background: rgba(230, 255, 251, 0.02);
  border-left: 2px solid var(--line);
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease), transform 0.18s var(--ease);
}

.page-about .process-step:hover,
.page-about .process-step:focus-within {
  border-left-color: var(--cyan);
  background: var(--glass);
  transform: translateX(3px);
}

.page-about .process-step__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  color: var(--cyan);
  margin-bottom: 8px;
}

.page-about .process-step__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: 0.05em;
  color: var(--mist);
  margin: 0 0 8px;
}

.page-about .process-step p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--slate);
}

.page-about .about-inline-figure {
  margin: clamp(26px, 4vw, 40px) 0 0;
}

.page-about .about-inline-figure img {
  aspect-ratio: 4 / 3;
  border: 1px solid var(--line);
}

.page-about .about-map {
  margin: clamp(26px, 4vw, 40px) 0 0;
}

.page-about .about-map img {
  aspect-ratio: 12 / 7;
  border: 1px solid var(--line);
  opacity: 0.92;
}

.page-about .about-gates {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 24px;
}

.page-about .gate {
  position: relative;
  min-width: 0;
  padding: 20px 18px;
  background: var(--ink-700);
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan);
}

.page-about .gate__index {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 0.1em;
}

.page-about .gate__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: 0.05em;
  color: var(--mist);
  margin: 8px 0 8px;
}

.page-about .gate p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--slate);
}

.page-about .about-timeline {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(0, 229, 199, 0.06));
}

.page-about .timeline-item {
  position: relative;
  padding-left: 30px;
  margin-bottom: 12px;
}

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 17px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--cyan);
  background: var(--ink-800);
}

.page-about .stage {
  border: 1px solid var(--line);
  background: rgba(230, 255, 251, 0.025);
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-about .stage[open] {
  border-color: var(--line-strong);
  background: var(--glass);
}

.page-about .stage:hover {
  border-color: var(--line-strong);
}

.page-about .stage__summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .stage__year {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.98rem;
  letter-spacing: 0.06em;
  color: var(--cyan);
  flex: none;
}

.page-about .stage__head {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.98rem;
  letter-spacing: 0.04em;
  color: var(--mist);
  min-width: 0;
}

.page-about .stage__hint {
  margin-left: auto;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--slate);
  flex: none;
}

.page-about .stage[open] .stage__hint {
  color: var(--orange);
}

.page-about .stage__body {
  padding: 0 16px 16px;
}

.page-about .stage__body p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.9;
  color: var(--slate);
}

.page-about .about-scenes {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin: 22px 0 0;
}

.page-about .scene {
  background: var(--ink-800);
  padding: 18px;
  min-width: 0;
  transition: background 0.18s var(--ease);
}

.page-about .scene:hover {
  background: var(--ink-700);
}

.page-about .scene__time {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: 0.06em;
  color: var(--orange);
  margin: 0 0 8px;
}

.page-about .scene__text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .scene__fix {
  display: block;
  margin-top: 8px;
  font-family: var(--font-editorial);
  font-size: 0.84rem;
  line-height: 1.75;
  color: var(--cyan);
}

.page-about .about-channels {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-top: 22px;
}

.page-about .channel {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line);
  background: rgba(230, 255, 251, 0.025);
  border-left: 2px solid var(--violet);
}

.page-about .channel__label {
  display: block;
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--slate);
  margin-bottom: 8px;
}

.page-about .channel__value {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.03em;
  color: var(--mist);
  text-decoration: none;
  word-break: break-all;
}

.page-about .channel__value--mono {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--cyan);
  transition: color 0.16s var(--ease);
}

.page-about .channel__value--mono:hover,
.page-about .channel__value--mono:focus-visible {
  color: var(--mist);
}

.page-about .channel__note {
  margin: 8px 0 0;
  font-size: 0.82rem;
  line-height: 1.75;
  color: var(--slate);
}

.page-about .about-close {
  padding-top: clamp(34px, 6vw, 72px);
}

.page-about .about-close__panel {
  border: 1px solid var(--line-strong);
  background: linear-gradient(135deg, rgba(0, 229, 199, 0.1), rgba(255, 107, 53, 0.07));
  padding: var(--about-pad);
  max-width: 100%;
}

.page-about .about-close__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.4rem, 3.6vw, 2.2rem);
  line-height: 1.28;
  letter-spacing: 0.03em;
  color: var(--mist);
  margin: 8px 0 14px;
}

.page-about .about-close__text {
  font-family: var(--font-body);
  font-size: 0.96rem;
  line-height: 1.9;
  color: var(--slate);
  margin: 0 0 22px;
  max-width: 56ch;
}

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

.page-about .about-close__actions .btn {
  display: inline-block;
  text-decoration: none;
}

@media (min-width: 640px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 900px) {
  .page-about .about-split {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--about-gap);
  }

  .page-about .about-rail {
    padding-left: 18px;
    position: sticky;
    top: 24px;
    align-self: start;
  }

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

  .page-about .about-banner img {
    aspect-ratio: 2 / 1;
  }
}

@media (min-width: 1100px) {
  .page-about .about-body p {
    font-size: 1.03rem;
  }

  .page-about .about-inline-figure {
    max-width: 78%;
    margin-left: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .process-step,
  .page-about .about-stat,
  .page-about .scene,
  .page-about .stage,
  .page-about .about-link,
  .page-about .channel__value--mono {
    transition: none;
  }

  .page-about .process-step:hover,
  .page-about .process-step:focus-within {
    transform: none;
  }
}
<<<END>>>