.page-about {
  background: var(--ink);
  color: var(--text);
  overflow-x: clip;
}

.page-about .breadcrumb {
  padding-top: 24px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: 24px 0 56px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 36px;
  align-items: end;
}

.page-about .about-hero h1 {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-size: clamp(28px, 7.2vw, 58px);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: 0.02em;
}

.page-about .about-hero .lede {
  margin-top: 20px;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-hero__actions {
  margin-top: 28px;
}

.page-about .about-hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 16px;
  margin: 32px 0 0;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

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

.page-about .fact__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-about .fact__value {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 22px;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

.page-about .about-hero__visual {
  margin: 0;
  padding: 16px;
  border: 1px solid var(--line-strong);
  background:
    radial-gradient(circle at 82% 12%, rgba(42, 240, 196, 0.16), transparent 58%),
    var(--deep);
  box-shadow: var(--stack);
}

.page-about .about-hero__visual figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-about .about-timeline {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-timeline__grid line {
  stroke: rgba(140, 167, 156, 0.16);
  stroke-width: 1;
}

.page-about .about-timeline__line {
  fill: none;
  stroke: var(--moss);
  stroke-width: 2;
}

.page-about .about-timeline__node {
  fill: var(--cyan);
  opacity: 0.5;
}

.page-about .about-timeline__node--now {
  fill: var(--cyan);
  opacity: 1;
  filter: drop-shadow(0 0 10px rgba(42, 240, 196, 0.7));
}

.page-about .about-timeline__labels text {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  fill: var(--muted);
}

/* ---------- 版本演进 ---------- */
.page-about .about-versions {
  padding: 8px 0 56px;
}

.page-about .about-versions__head h2 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 5.2vw, 42px);
  line-height: 1.2;
  letter-spacing: 0.03em;
}

.page-about .about-versions__intro {
  margin-top: 16px;
  max-width: 56ch;
  color: var(--muted);
  line-height: 1.7;
}

.page-about .about-versions__banner {
  margin: 32px 0 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-versions__banner img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 6;
  object-fit: cover;
}

.page-about .about-versions__banner figcaption {
  padding: 10px 20px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-about .about-versions__body {
  display: grid;
  gap: 24px;
  margin-top: 32px;
}

.page-about .about-index {
  border-top: 1px solid var(--line-strong);
  padding-top: 12px;
}

.page-about .about-index__list {
  display: flex;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index__list li {
  flex: 0 0 auto;
}

.page-about .about-index__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 12px;
  border-left: 2px solid transparent;
  color: var(--muted);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-index__link .num {
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--cyan-soft);
  border-left-color: var(--cyan);
}

.page-about .about-index__link.is-current {
  color: var(--cyan);
  border-left-color: var(--cyan);
}

.page-about .version {
  padding: 22px 0 8px;
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .version__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}

.page-about .version__year {
  font-family: var(--font-mono);
  font-size: clamp(38px, 9vw, 64px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--moss);
}

.page-about .version h3 {
  margin: 14px 0 0;
  font-size: 19px;
  line-height: 1.4;
  letter-spacing: 0.02em;
}

.page-about .version p {
  margin: 10px 0 0;
  max-width: 62ch;
  color: var(--muted);
  line-height: 1.75;
}

/* ---------- 校对台 ---------- */
.page-about .about-review {
  padding: 48px 0;
  background: var(--deep);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-review__grid {
  display: grid;
  gap: 36px;
}

.page-about .about-review h2 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 5.2vw, 40px);
  line-height: 1.22;
  letter-spacing: 0.03em;
}

.page-about .about-review__main > p {
  margin-top: 16px;
  max-width: 62ch;
  color: var(--muted);
  line-height: 1.75;
}

.page-about .review-steps {
  display: grid;
  gap: 14px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .review-step {
  padding: 14px 0 14px 16px;
  border-left: 2px solid var(--line-strong);
}

.page-about .review-step__num {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-about .review-step h3 {
  margin: 6px 0 0;
  font-size: 16px;
  letter-spacing: 0.04em;
}

.page-about .review-step p {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .field-list {
  margin-top: 28px;
  border-top: 1px solid var(--line);
}

.page-about .field-list > .fold {
  border-bottom: 1px solid var(--line);
}

.page-about .field-list .fold__summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding: 14px 0;
  cursor: pointer;
}

.page-about .field-name {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--cyan-soft);
}

.page-about .field-hint {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .field-list .fold__body p {
  margin: 0 0 14px;
  max-width: 60ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-review__figure {
  margin: 0;
  align-self: start;
}

.page-about .about-review__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border: 1px solid var(--line-strong);
  box-shadow: var(--stack);
}

.page-about .about-review__figure figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding: 56px 0;
}

.page-about .about-team__head h2 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 5.2vw, 40px);
  letter-spacing: 0.03em;
}

.page-about .about-team__head p {
  margin-top: 14px;
  max-width: 58ch;
  color: var(--muted);
  line-height: 1.75;
}

.page-about .team-grid {
  display: grid;
  gap: 14px;
  margin-top: 28px;
}

.page-about .team-card {
  padding: 18px;
  border: 1px solid var(--line);
  background: var(--layer);
  box-shadow: 6px 6px 0 var(--deep);
}

.page-about .team-card__num {
  display: block;
  font-size: 32px;
  line-height: 1;
  color: var(--purple);
}

.page-about .team-card h3 {
  margin: 10px 0 0;
  font-size: 16px;
  letter-spacing: 0.05em;
}

.page-about .team-card p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.65;
  color: var(--muted);
}

.page-about .about-team__shift {
  margin: 24px 0 0;
  padding: 14px 16px;
  border-left: 4px solid var(--orange);
  background: rgba(16, 40, 31, 0.72);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.06em;
  color: var(--cyan-soft);
}

/* ---------- 地域取向 ---------- */
.page-about .about-geo {
  padding: 48px 0;
  background: var(--paper);
  color: var(--paper-ink);
}

.page-about .about-geo__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-geo__figure {
  margin: 0;
}

.page-about .about-geo__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid rgba(11, 31, 25, 0.25);
  box-shadow: 8px 8px 0 rgba(28, 79, 62, 0.22);
}

.page-about .about-geo__figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: rgba(11, 31, 25, 0.6);
}

.page-about .about-geo .eyebrow {
  color: rgba(11, 31, 25, 0.55);
}

.page-about .about-geo h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 5.4vw, 40px);
  line-height: 1.22;
  letter-spacing: 0.03em;
  color: var(--paper-ink);
}

.page-about .about-geo__copy p {
  margin-top: 14px;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(11, 31, 25, 0.78);
}

/* ---------- 合作方 ---------- */
.page-about .about-partners {
  padding: 56px 0;
}

.page-about .about-partners h2 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 5.2vw, 40px);
  line-height: 1.22;
  letter-spacing: 0.03em;
}

.page-about .about-partners__lede {
  margin-top: 16px;
  max-width: 66ch;
  color: var(--muted);
  line-height: 1.75;
}

.page-about .partner-points {
  display: grid;
  gap: 18px;
  margin-top: 28px;
}

.page-about .partner-point {
  padding-top: 14px;
  border-top: 2px solid var(--cyan);
}

.page-about .partner-point h3 {
  margin: 0;
  font-size: 16px;
  letter-spacing: 0.05em;
}

.page-about .partner-point p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 数字条 ---------- */
.page-about .about-metrics {
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  background: linear-gradient(100deg, var(--deep) 0%, var(--layer) 58%, var(--moss) 100%);
}

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

.page-about .about-metrics__item {
  padding: 22px 16px;
  border-left: 1px solid rgba(42, 240, 196, 0.18);
}

.page-about .about-metrics__item:nth-child(odd) {
  border-left: 0;
}

.page-about .about-metrics__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-about .about-metrics__value {
  margin: 8px 0 0;
  font-size: clamp(28px, 6vw, 44px);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

/* ---------- 收束 ---------- */
.page-about .about-closing {
  padding: 96px 0 112px;
  background: var(--ink);
}

.page-about .about-closing__inner {
  max-width: 720px;
}

.page-about .about-closing h2 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 6vw, 48px);
  line-height: 1.16;
  letter-spacing: 0.03em;
}

.page-about .about-closing p {
  margin-top: 18px;
  color: var(--muted);
  line-height: 1.75;
}

.page-about .about-closing__actions {
  margin-top: 28px;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero {
    padding: 32px 0 72px;
  }

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

  .page-about .review-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .partner-points {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

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

  .page-about .about-metrics__item:nth-child(odd) {
    border-left: 1px solid rgba(42, 240, 196, 0.18);
  }

  .page-about .about-metrics__item:first-child {
    border-left: 0;
  }

  .page-about .about-geo {
    padding: 64px 0;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 5.4fr) minmax(0, 6fr);
    gap: 56px;
  }

  .page-about .about-versions__head {
    display: grid;
    grid-template-columns: minmax(0, 5.4fr) minmax(0, 6fr);
    column-gap: 56px;
    align-items: end;
  }

  .page-about .about-versions__head .eyebrow {
    grid-column: 1 / -1;
  }

  .page-about .about-versions__head h2 {
    margin-top: 16px;
  }

  .page-about .about-versions__intro {
    margin-top: 0;
    padding-bottom: 6px;
  }

  .page-about .about-versions__body {
    grid-template-columns: 220px minmax(0, 1fr);
    column-gap: 56px;
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-about .about-index__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-index__list li + li {
    margin-top: 6px;
  }

  .page-about .about-index__link {
    display: grid;
    grid-template-columns: 44px minmax(0, 1fr);
    align-items: baseline;
    padding: 10px 0 10px 14px;
    border-left: 2px solid var(--line);
    white-space: normal;
  }

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

  .page-about .about-index__link.is-current {
    border-left-color: var(--cyan);
  }

  .page-about .version {
    padding: 28px 0 16px;
  }

  .page-about .version h3 {
    font-size: 22px;
  }

  .page-about .about-review__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4.4fr);
    column-gap: 56px;
    align-items: start;
  }

  .page-about .about-review {
    padding: 72px 0;
  }

  .page-about .about-review__figure {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

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

  .page-about .about-geo__grid {
    grid-template-columns: minmax(0, 5.4fr) minmax(0, 6fr);
    column-gap: 56px;
    align-items: center;
  }

  .page-about .about-closing {
    padding: 120px 0 140px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>