.page-about {
  --about-rail: 268px;
  --about-soft-line: rgba(54, 80, 107, 0.34);
  --about-acid-line: rgba(184, 255, 61, 0.42);
}

.page-about .breadcrumb {
  padding-top: clamp(18px, 3vw, 30px);
  font-size: 13px;
  color: var(--faint);
}

.page-about .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
}

.page-about .breadcrumb a:hover {
  color: var(--cyan);
}

.page-about .breadcrumb__sep {
  margin: 0 8px;
  color: var(--steel);
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  padding-bottom: clamp(30px, 5vw, 64px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -10% -20% auto auto;
  width: 60%;
  height: 70%;
  background: radial-gradient(closest-side, rgba(122, 92, 255, 0.20), transparent 72%);
  pointer-events: none;
  z-index: -1;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 46px);
  margin-top: clamp(20px, 3vw, 34px);
  align-items: end;
}

.page-about .about-hero__lead .eyebrow {
  margin: 0 0 14px;
}

.page-about .about-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(32px, 5.6vw, 62px);
  line-height: 1.16;
  letter-spacing: 0.02em;
  color: var(--mist);
}

.page-about .about-hero__lede {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 46em;
  font-size: clamp(15px, 1.4vw, 17.5px);
  line-height: 1.78;
  color: var(--muted);
}

.page-about .hero-facts {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 16px 32px;
  margin: 26px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--about-soft-line);
}

.page-about .hero-facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .hero-facts .mono {
  font-family: var(--font-mono);
  font-size: clamp(17px, 1.9vw, 23px);
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .hero-facts em {
  font-style: normal;
  font-size: 12.5px;
  color: var(--faint);
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  border: 1px solid var(--about-soft-line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--ink-800);
  box-shadow: 0 26px 60px -40px rgba(20, 224, 208, 0.5);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.6) contrast(1.06) brightness(0.86);
}

.page-about .about-hero__figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    to bottom,
    rgba(20, 224, 208, 0.06) 0 1px,
    transparent 1px 5px
  );
  pointer-events: none;
}

.page-about .about-hero__figure figcaption {
  padding: 12px 18px;
  border-top: 1px solid var(--about-soft-line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--faint);
}

/* 编辑部式两栏骨架 */
.page-about .about-section {
  padding-block: clamp(44px, 6vw, 82px);
  border-top: 1px solid var(--about-soft-line);
}

.page-about .about-section:first-of-type {
  border-top: 0;
}

.page-about .about-rail {
  margin-bottom: 24px;
}

.page-about .rail-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--acid);
}

.page-about .about-rail h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 34px);
  line-height: 1.28;
  letter-spacing: 0.015em;
  color: var(--mist);
}

.page-about .rail-note {
  position: relative;
  margin: 14px 0 0;
  padding-left: 14px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--faint);
  border-left: 1px solid var(--cyan-line);
}

.page-about .about-p {
  margin: 0 0 18px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted);
}

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

/* 时间线 */
.page-about .tl-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 26px;
}

.page-about .tl-filter .chip {
  cursor: pointer;
  border: 1px solid var(--cyan-line);
  background: transparent;
  color: var(--muted);
  font-size: 13px;
  padding: 7px 15px;
  border-radius: var(--pill);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-about .tl-filter .chip:hover {
  color: var(--mist);
  border-color: var(--cyan);
}

.page-about .tl-filter .chip[aria-pressed="true"] {
  background: var(--acid);
  border-color: var(--acid);
  color: var(--ink-900);
  box-shadow: 0 0 0 6px rgba(184, 255, 61, 0.12);
}

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

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 10px;
  bottom: 18px;
  width: 1px;
  background: linear-gradient(to bottom, var(--cyan), rgba(122, 92, 255, 0.55), transparent);
}

.page-about .tl__item {
  position: relative;
  padding: 0 0 30px 42px;
}

.page-about .tl__item[hidden] {
  display: none;
}

.page-about .tl__dot {
  position: absolute;
  left: 0;
  top: 2px;
  width: 23px;
  height: 23px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--cyan-line);
  background: var(--ink-900);
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--cyan);
}

.page-about .tl__year {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--violet);
}

.page-about .tl__item h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(16px, 1.7vw, 19px);
  line-height: 1.45;
  color: var(--mist);
}

.page-about .tl__item p:not(.tl__year) {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
}

/* 方法 */
.page-about .method-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .method-list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 4px 14px;
  padding: 18px 0;
  border-bottom: 1px dashed var(--about-soft-line);
}

.page-about .method-list__no {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--cyan);
  line-height: 1.2;
}

.page-about .method-list h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 16px;
  color: var(--mist);
}

.page-about .method-list p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .method-figure {
  margin: 30px 0 0;
  border: 1px solid var(--about-soft-line);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--ink-800);
}

.page-about .method-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.55) contrast(1.05);
}

.page-about .method-figure figcaption {
  padding: 11px 16px;
  border-top: 1px solid var(--about-soft-line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--faint);
}

/* 衬线引题 */
.page-about .about-pull {
  padding-block: clamp(30px, 5vw, 56px);
}

.page-about .about-pull p {
  margin: 0;
  padding: clamp(22px, 3.4vw, 38px);
  border-left: 2px solid var(--cyan);
  background: linear-gradient(100deg, var(--cyan-soft), rgba(122, 92, 255, 0.07) 60%, transparent);
  border-radius: 0 var(--r-lg) var(--r-lg) 0;
  font-family: var(--font-serif);
  font-size: clamp(19px, 2.5vw, 30px);
  line-height: 1.56;
  color: var(--mist);
}

.page-about .about-pull__sign {
  display: block;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--faint);
}

/* 历史档案 */
.page-about .legacy-card {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  overflow: hidden;
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, var(--ink-800), var(--ink-900));
}

.page-about .legacy-card__body {
  padding: clamp(20px, 3vw, 30px);
}

.page-about .legacy-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .legacy-list li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
  padding-top: 12px;
  border-top: 1px solid var(--about-soft-line);
}

.page-about .legacy-list .mono {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--cyan);
  letter-spacing: 0.04em;
}

.page-about .legacy-list em {
  font-style: normal;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .legacy-card__figure {
  margin: 0;
  border-top: 1px solid var(--about-soft-line);
  background: var(--ink-700);
}

.page-about .legacy-card__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.45) contrast(1.08) brightness(0.9);
}

.page-about .legacy-card__figure figcaption {
  padding: 11px 18px;
  border-top: 1px solid var(--about-soft-line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--faint);
}

.page-about .legacy-flag {
  margin: 20px 0 0;
  padding: 14px 16px;
  border: 1px solid var(--about-acid-line);
  border-radius: var(--r-sm);
  background: rgba(184, 255, 61, 0.05);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .legacy-flag .mono {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--acid);
}

/* 团队 */
.page-about .team-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 24px 0 26px;
}

.page-about .team-card {
  padding: 20px;
  border: 1px solid var(--about-soft-line);
  border-radius: var(--r-md);
  background: var(--ink-800);
  position: relative;
}

.page-about .team-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 20px;
  width: 42px;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--violet));
}

.page-about .team-card h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 16px;
  letter-spacing: 0.03em;
  color: var(--mist);
}

.page-about .team-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.76;
  color: var(--muted);
}

.page-about .team-partner {
  padding-left: 16px;
  border-left: 1px solid var(--cyan-line);
}

/* 规模数字带 */
.page-about .about-scale {
  margin-block: clamp(20px, 4vw, 40px);
  padding-block: clamp(40px, 6vw, 72px);
  background:
    radial-gradient(70% 120% at 12% 0%, rgba(20, 224, 208, 0.12), transparent 68%),
    radial-gradient(60% 120% at 92% 100%, rgba(122, 92, 255, 0.16), transparent 70%),
    var(--ink-800);
  border-block: 1px solid var(--about-soft-line);
}

.page-about .scale-head {
  margin-bottom: 26px;
}

.page-about .scale-head h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 36px);
  letter-spacing: 0.02em;
  color: var(--mist);
}

.page-about .scale-head p {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--faint);
}

.page-about .scale-band {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  background: var(--about-soft-line);
  border: 1px solid var(--about-soft-line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .scale-item {
  padding: 20px 18px clamp(18px, 2vw, 24px);
  background: var(--ink-900);
}

.page-about .scale-item dt {
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--faint);
}

.page-about .scale-item dd {
  margin: 8px 0 6px;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1.1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .scale-item p {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--muted);
}

/* 内容计划与行动入口 */
.page-about .plan-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .plan-card {
  padding: 22px;
  border: 1px solid var(--about-soft-line);
  border-radius: var(--r-md);
  background: linear-gradient(150deg, rgba(20, 224, 208, 0.06), transparent 70%), var(--ink-800);
}

.page-about .plan-card__tag {
  display: inline-block;
  padding: 4px 11px;
  border-radius: var(--pill);
  background: var(--cyan-soft);
  border: 1px solid var(--cyan-line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-about .plan-card h3 {
  margin: 14px 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  color: var(--mist);
}

.page-about .plan-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.76;
  color: var(--muted);
}

.page-about .about-cta {
  margin-top: 30px;
  padding: clamp(20px, 3vw, 30px);
  border-radius: var(--r-lg);
  border: 1px solid var(--about-soft-line);
  background: var(--ink-800);
}

.page-about .about-cta p {
  margin: 0 0 18px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-cta__actions .btn {
  font-size: 14px;
  text-decoration: none;
}

/* 中屏与桌面 */
@media (min-width: 620px) {
  .page-about .team-grid,
  .page-about .plan-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .legacy-list li {
    grid-template-columns: 122px minmax(0, 1fr);
    gap: 12px;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-section {
    display: grid;
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 58px);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: 104px;
    margin-bottom: 0;
    padding-right: 18px;
    border-right: 1px solid var(--about-soft-line);
  }

  .page-about .about-rail h2 {
    font-size: clamp(21px, 2.1vw, 26px);
  }

  .page-about .legacy-card {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: stretch;
  }

  .page-about .legacy-card__figure {
    border-top: 0;
    border-left: 1px solid var(--about-soft-line);
    display: flex;
    flex-direction: column;
  }

  .page-about .legacy-card__figure img {
    flex: 1;
    height: 100%;
  }

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

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero__figure::after {
    display: none;
  }

  .page-about .tl-filter .chip {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>