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

.page-about [id^="season-"] {
  scroll-margin-top: var(--space-8);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-about .about-hero__img {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-about .about-hero__scrim {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--overlay-scrim);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 68%;
  z-index: -1;
  pointer-events: none;
  background: linear-gradient(
    to top,
    var(--color-contrast-surface) 0%,
    color-mix(in srgb, var(--color-contrast-surface) 72%, transparent) 48%,
    transparent 100%
  );
}

.page-about .about-hero__inner {
  position: relative;
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  min-height: calc(var(--space-8) * 8);
  padding: var(--space-8) var(--gutter) var(--space-6);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: var(--space-3);
}

.page-about .about-hero .crumbs,
.page-about .about-hero .crumbs a,
.page-about .about-hero .crumbs span {
  color: var(--color-contrast-ink);
}

.page-about .about-hero .crumbs {
  opacity: 0.68;
  margin-bottom: var(--space-2);
}

.page-about .about-hero .eyebrow {
  color: var(--color-contrast-ink);
  opacity: 0.62;
  letter-spacing: 0.22em;
}

.page-about .about-hero__title {
  margin: 0;
  max-width: 20ch;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: clamp(var(--text-2xl), 6vw, var(--text-3xl));
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 46ch;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.86;
}

.page-about .about-hero__ticks {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
  margin: var(--space-2) 0 0;
  padding: var(--space-3) 0 0;
  list-style: none;
  border-top: var(--border-thin) solid var(--color-contrast-line);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-contrast-ink);
  opacity: 0.6;
}

.page-about .about-hero__ticks li {
  position: relative;
  padding-left: var(--space-3);
}

.page-about .about-hero__ticks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 10px;
  height: var(--border-thin);
  background: currentColor;
  transform: translateY(-50%);
}

/* ---------- 刻度索引 ---------- */

.page-about .about-track {
  padding-block: var(--space-6);
  background: var(--color-surface-alt);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-about .about-track__intro {
  margin: 0 0 var(--space-4);
  max-width: 44ch;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

.page-about .about-track__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-track__list a {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  height: 100%;
  padding: var(--space-3);
  border: var(--border-thin) solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-ink);
  text-decoration: none;
  transition: border-color 200ms ease, background-color 200ms ease, color 200ms ease;
}

.page-about .about-track__list a:hover,
.page-about .about-track__list a:focus-visible {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
  color: var(--color-primary-ink);
}

.page-about .about-track__no {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--color-accent);
}

.page-about .about-track__list a:hover .about-track__no {
  color: var(--color-primary-ink);
}

.page-about .about-track__label {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
}

/* ---------- 叙事主体 ---------- */

.page-about .chronicle {
  background: var(--color-surface);
}

.page-about .chronicle--tail {
  border-top: var(--border-thin) solid var(--color-line);
}

.page-about .chronicle__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  padding-block: var(--space-8);
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-about .chronicle__row:last-child {
  border-bottom: 0;
}

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

.page-about .chronicle__body .eyebrow {
  margin: 0;
  color: var(--color-ink-muted);
  letter-spacing: 0.2em;
}

.page-about .chronicle__body .section-title {
  margin: var(--space-2) 0 var(--space-3);
}

.page-about .chronicle__body p {
  max-width: 38em;
  margin: 0 0 var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink);
}

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

.page-about .chronicle__mark {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  padding-top: var(--space-3);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-about .chronicle__no {
  display: block;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-2xl);
  line-height: 1;
  letter-spacing: var(--tracking-heading);
  color: var(--color-primary);
  transition: color 200ms ease;
}

.page-about .chronicle__row:nth-child(even) .chronicle__no {
  color: var(--color-accent);
}

.page-about .chronicle__note {
  margin: 0;
  max-width: 26ch;
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
  transition: color 200ms ease;
}

@media (hover: hover) {
  .page-about .chronicle__row:hover .chronicle__no {
    color: var(--color-accent);
  }

  .page-about .chronicle__row:hover .chronicle__note {
    color: var(--color-ink);
  }
}

/* ---------- 团队浅色区 ---------- */

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}

.page-about .about-team__lead .eyebrow {
  margin: 0;
  color: var(--color-contrast-ink);
  opacity: 0.6;
  letter-spacing: 0.2em;
}

.page-about .about-team__lead .section-title {
  margin: var(--space-2) 0 var(--space-3);
}

.page-about .about-team__lead p {
  max-width: 38em;
  margin: 0 0 var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-body);
}

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

.page-about .about-team__side {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.page-about .about-team__media {
  margin: 0;
  overflow: hidden;
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-lg);
  background: var(--color-contrast-surface);
}

.page-about .about-team__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-about .about-team__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-team__stats li {
  padding: var(--space-3);
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-md);
  transition: border-color 200ms ease, box-shadow 200ms ease;
}

.page-about .about-team__stats li:hover,
.page-about .about-team__stats li:focus-within {
  border-color: var(--color-contrast-accent);
  box-shadow: var(--shadow-1);
}

.page-about .about-team__num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  line-height: 1.05;
  letter-spacing: 0.02em;
  color: var(--color-contrast-ink);
  transition: color 200ms ease;
}

.page-about .about-team__stats li:hover .about-team__num {
  color: var(--color-contrast-accent);
}

.page-about .about-team__label {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.72;
}

/* ---------- 协作与认可 ---------- */

.page-about .about-partners {
  background: var(--color-surface-alt);
  border-block: var(--border-thin) solid var(--color-line);
}

.page-about .about-partners .eyebrow {
  margin: 0;
  color: var(--color-ink-muted);
  letter-spacing: 0.2em;
}

.page-about .about-partners .section-title {
  margin: var(--space-2) 0 var(--space-6);
}

.page-about .about-partners__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-partners__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--space-3);
  padding-block: var(--space-4);
  border-top: var(--border-thin) solid var(--color-line);
}

.page-about .about-partners__item:last-child {
  border-bottom: var(--border-thin) solid var(--color-line);
}

.page-about .about-partners__no {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.1em;
  color: var(--color-accent);
  padding-top: 0.35em;
}

.page-about .about-partners__name {
  margin: 0 0 var(--space-1);
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-ink);
}

.page-about .about-partners__desc {
  max-width: 52ch;
  margin: 0;
  font-size: var(--text-base);
  line-height: var(--leading-body);
  color: var(--color-ink-soft);
}

/* ---------- 收尾 ---------- */

.page-about .about-closing {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-top: var(--border-thin) solid var(--color-line);
}

.page-about .about-closing__img {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-about .about-closing__scrim {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--overlay-scrim);
}

.page-about .about-closing__inner {
  position: relative;
  padding-block: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.page-about .about-closing .eyebrow {
  margin: 0;
  color: var(--color-contrast-ink);
  opacity: 0.6;
  letter-spacing: 0.22em;
}

.page-about .about-closing__line {
  margin: 0;
  max-width: 22ch;
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: clamp(var(--text-xl), 4.4vw, var(--text-2xl));
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-heading);
  color: var(--color-contrast-ink);
}

.page-about .about-closing__links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-2);
  margin: var(--space-3) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-closing__links a {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  height: 100%;
  padding: var(--space-3);
  border: var(--border-thin) solid var(--color-contrast-line);
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--color-contrast-surface) 78%, transparent);
  color: var(--color-contrast-ink);
  text-decoration: none;
  transition: border-color 200ms ease, background-color 200ms ease;
}

.page-about .about-closing__links a:hover,
.page-about .about-closing__links a:focus-visible {
  border-color: var(--color-contrast-accent);
  background: var(--color-contrast-surface);
}

.page-about .about-closing__link-title {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  font-size: var(--text-base);
  letter-spacing: var(--tracking-heading);
}

.page-about .about-closing__link-note {
  font-size: var(--text-sm);
  line-height: var(--leading-body);
  color: var(--color-contrast-ink);
  opacity: 0.78;
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-about .about-track__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-team__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-track__list {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: var(--space-8);
    align-items: start;
  }

  .page-about .chronicle__row {
    grid-template-columns: minmax(0, 1fr) 210px;
    gap: var(--space-8);
    align-items: start;
  }

  .page-about .chronicle__row:nth-child(even) {
    padding-left: var(--space-8);
  }

  .page-about .chronicle__mark {
    padding-top: 0;
    padding-right: var(--space-4);
    border-top: 0;
    border-right: var(--border-thin) solid var(--color-line);
    align-items: flex-end;
    text-align: right;
  }

  .page-about .chronicle__note {
    text-align: right;
  }

  .page-about .about-closing__inner {
    padding-block: var(--section-y-lg);
  }
}

@media (min-width: 1100px) {
  .page-about .chronicle__row:nth-child(odd) .chronicle__body {
    padding-right: var(--space-6);
  }
}
<<<END>>>