.page-about {
  --about-stroke: rgba(53, 242, 208, 0.22);
  --about-soft: rgba(53, 242, 208, 0.1);
  overflow-x: clip;
  background: var(--arena-900);
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(1.4rem, 4vw, 2.6rem) var(--gutter) clamp(2.4rem, 6vw, 4.5rem);
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(53, 242, 208, 0.13), transparent 62%),
    radial-gradient(95% 80% at 0% 100%, rgba(255, 90, 31, 0.13), transparent 58%),
    var(--arena-900);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto -15% -32% 34%;
  height: 64%;
  background: linear-gradient(120deg, rgba(53, 242, 208, 0.14), rgba(12, 33, 56, 0) 72%);
  transform: skewY(-6deg);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  max-width: var(--wrap);
  margin: 0 auto;
  align-items: center;
}

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

.page-about .breadcrumb {
  margin-bottom: 1.1rem;
}

.page-about .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .breadcrumb__item {
  display: inline-flex;
  align-items: center;
  font-size: 0.8rem;
  color: var(--mist);
}

.page-about .breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  margin-right: 0.4rem;
  color: var(--line);
}

.page-about .breadcrumb__link {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .breadcrumb__link:hover,
.page-about .breadcrumb__link:focus-visible {
  color: var(--cyan-500);
  border-bottom-color: var(--cyan-500);
}

.page-about .eyebrow {
  display: inline-block;
  margin: 0 0 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan-500);
}

.page-about .about-hero h1 {
  margin: 0;
  font-size: clamp(1.9rem, 5.2vw, 3.4rem);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-hero__lede {
  max-width: 40em;
  margin: 1.2rem 0 0;
  font-size: clamp(1rem, 1.4vw, 1.08rem);
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem 1.2rem;
  margin: 1.9rem 0 0;
  padding: 1.2rem 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .about-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  min-width: 0;
}

.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan-500);
}

.page-about .about-hero__small {
  font-size: 0.62em;
  margin-left: 0.08em;
  color: var(--cyan-200);
}

.page-about .about-hero__unit {
  font-size: 0.78rem;
  color: var(--mist);
}

.page-about .about-hero__visual {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  clip-path: polygon(7% 0, 100% 0, 100% 88%, 0 100%);
  box-shadow: 0 24px 60px rgba(7, 20, 38, 0.55);
}

.page-about .about-hero__visual img {
  display: block;
  width: 100%;
  height: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* ---------- Shell + Rail ---------- */
.page-about .about-shell {
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.4rem);
  max-width: var(--wrap);
  margin: 0 auto;
  padding: clamp(2rem, 5vw, 3.6rem) var(--gutter) clamp(3rem, 6vw, 5rem);
}

.page-about .about-rail {
  position: relative;
  min-width: 0;
}

.page-about .rail__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-rail__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.5rem;
  margin: 0.9rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.35rem 0.55rem;
  font-size: 0.86rem;
  color: var(--mist);
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 2px;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--cyan-500);
  border-color: var(--line);
  background: var(--about-soft);
}

.page-about .about-rail__num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--orange-400);
}

/* ---------- Chapters ---------- */
.page-about .about-flow {
  min-width: 0;
}

.page-about .about-chapter {
  border-top: 1px solid var(--line);
  padding-block: clamp(1.9rem, 4vw, 3rem);
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.5rem;
}

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

.page-about .about-chapter__index {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  font-weight: 200;
  line-height: 1;
  letter-spacing: -0.05em;
  color: var(--about-stroke);
}

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

.page-about .about-chapter h2 {
  margin: 0 0 1rem;
  font-size: clamp(1.35rem, 2.8vw, 1.95rem);
  font-weight: 700;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .about-chapter h3 {
  margin: 0 0 0.4rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-chapter p {
  max-width: 42em;
  margin: 0 0 1rem;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--mist);
}

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

.page-about .about-inline-link {
  color: var(--cyan-200);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .about-inline-link:hover,
.page-about .about-inline-link:focus-visible {
  color: var(--cyan-500);
  border-bottom-color: var(--cyan-500);
}

/* ---------- Metrics ---------- */
.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.85rem;
  margin: 1.6rem 0 1.9rem;
  padding: 0;
  list-style: none;
}

.page-about .about-metric {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.28rem;
  padding: 1rem 1.05rem;
  background: linear-gradient(158deg, var(--arena-800), var(--arena-700));
  border: 1px solid var(--line);
  border-radius: 2px;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .about-metric::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan-500), rgba(53, 242, 208, 0));
}

.page-about .about-metric:hover {
  border-color: var(--cyan-500);
  transform: translateY(-2px);
}

.page-about .about-metric__num {
  font-family: var(--font-mono);
  font-size: 1.7rem;
  font-weight: 700;
  line-height: 1;
  color: var(--paper);
}

.page-about .about-metric__small {
  font-size: 0.55em;
  margin-left: 0.06em;
  color: var(--cyan-500);
}

.page-about .about-metric__label {
  font-size: 0.86rem;
  color: var(--cyan-200);
}

.page-about .about-metric__note {
  font-size: 0.76rem;
  line-height: 1.55;
  color: var(--mist);
}

/* ---------- Figures ---------- */
.page-about .about-figure {
  margin: 1.8rem 0 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 2px;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-about .about-figure--wide img {
  aspect-ratio: 3 / 2;
}

.page-about .about-figure figcaption {
  padding: 0.75rem 0.9rem;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--mist);
  background: var(--arena-800);
  border-top: 1px solid var(--line);
}

/* ---------- Team ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem;
  margin-top: 1.4rem;
}

.page-about .about-team__card {
  position: relative;
  padding: 1.05rem 1.1rem;
  background: var(--arena-800);
  border: 1px solid var(--line);
  border-left: 2px solid var(--line);
  border-radius: 2px;
  cursor: default;
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about .about-team__card:hover,
.page-about .about-team__card:focus,
.page-about .about-team__card:focus-visible {
  border-color: var(--cyan-500);
  border-left-color: var(--orange-600);
  background: linear-gradient(150deg, var(--arena-800), var(--arena-700));
  outline: none;
}

.page-about .about-team__card:focus-visible {
  box-shadow: 0 0 0 2px var(--cyan-500);
}

.page-about .about-team__name {
  font-size: 1.02rem;
}

.page-about .about-team__count {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--orange-400);
}

.page-about .about-team__line {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--cyan-200);
}

.page-about .about-team__detail {
  max-height: 0;
  margin: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 0.86rem;
  line-height: 1.75;
  color: var(--mist);
  transition: max-height 0.38s var(--ease), opacity 0.3s var(--ease), margin 0.38s var(--ease);
}

.page-about .about-team__card:hover .about-team__detail,
.page-about .about-team__card:focus .about-team__detail,
.page-about .about-team__card:focus-visible .about-team__detail {
  max-height: 14rem;
  margin-top: 0.65rem;
  opacity: 1;
}

/* ---------- Timeline ---------- */
.page-about .about-timeline {
  margin: 1.6rem 0 0;
  padding: 0 0 0 1.55rem;
  list-style: none;
  border-left: 1px solid var(--line);
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.3rem;
  padding: 0 0 1.5rem;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: calc(-1.55rem - 5px);
  top: 0.5rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan-500);
  box-shadow: 0 0 0 3px rgba(53, 242, 208, 0.15);
  transition: box-shadow 0.3s var(--ease), background 0.3s var(--ease);
}

.page-about .about-timeline__item:hover::before,
.page-about .about-timeline__item:focus-within::before {
  background: var(--orange-600);
  box-shadow: 0 0 0 5px rgba(255, 90, 31, 0.16);
}

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--orange-400);
}

.page-about .about-timeline__content h3 {
  margin: 0 0 0.3rem;
  font-size: 1rem;
  color: var(--paper);
}

.page-about .about-timeline__content p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--mist);
  transition: color 0.25s var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__content p,
.page-about .about-timeline__item:focus-within .about-timeline__content p {
  color: var(--cyan-200);
}

/* ---------- Partners ---------- */
.page-about .about-partners {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.7rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-partners__item {
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
  padding: 0.8rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: rgba(12, 33, 56, 0.6);
}

.page-about .about-partners__num {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan-500);
}

.page-about .about-partners__text {
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- Principles ---------- */
.page-about .about-principles {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
  margin-top: 1.5rem;
}

.page-about .about-principle {
  position: relative;
  padding: 1.15rem 1.1rem 1.25rem;
  background: linear-gradient(165deg, rgba(23, 51, 79, 0.85), rgba(7, 20, 38, 0.9));
  border: 1px solid var(--line);
  border-radius: 2px;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .about-principle::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan-500), rgba(53, 242, 208, 0));
}

.page-about .about-principle:hover {
  border-color: var(--cyan-500);
  transform: translateY(-2px);
}

.page-about .about-principle__key {
  display: inline-block;
  margin-bottom: 0.6rem;
  font-family: var(--font-mono);
  font-size: 1.55rem;
  font-weight: 700;
  line-height: 1;
  color: var(--orange-600);
}

.page-about .about-principle p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- Next ---------- */
.page-about .about-next {
  margin-top: clamp(2rem, 5vw, 3.2rem);
  padding: clamp(1.5rem, 4vw, 2.4rem);
  background:
    radial-gradient(120% 120% at 100% 0%, rgba(53, 242, 208, 0.14), transparent 62%),
    var(--arena-800);
  border: 1px solid var(--line);
  border-radius: 2px;
}

.page-about .about-next h2 {
  margin: 0 0 0.8rem;
  font-size: clamp(1.25rem, 2.6vw, 1.7rem);
  font-weight: 700;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .about-next p {
  max-width: 42em;
  margin: 0 0 1.4rem;
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

/* ---------- Media queries ---------- */
@media (min-width: 600px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

  .page-about .about-timeline__item {
    grid-template-columns: 76px minmax(0, 1fr);
    gap: 1rem;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }
}

@media (min-width: 1024px) {
  .page-about .about-shell {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.6rem);
  }

  .page-about .about-rail {
    position: sticky;
    top: 132px;
    align-self: start;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0.1rem;
    margin-top: 1.1rem;
  }

  .page-about .about-rail__link {
    width: 100%;
    padding: 0.45rem 0.6rem;
    border-left: 1px solid var(--line);
    border-top: 0;
    border-right: 0;
    border-bottom: 0;
    border-radius: 0;
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    border-left-color: var(--cyan-500);
    background: linear-gradient(90deg, var(--about-soft), transparent 90%);
  }

  .page-about .about-chapter {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 1.4rem;
  }

  .page-about .about-chapter__index {
    position: sticky;
    top: 150px;
    align-self: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-metric,
  .page-about .about-principle,
  .page-about .about-team__detail,
  .page-about .about-timeline__content p {
    transition: none;
  }

  .page-about .about-metric:hover,
  .page-about .about-principle:hover {
    transform: none;
  }
}
<<<END>>>