.page-about {
  --about-rail: 28%;
  --about-gap: clamp(1.5rem, 4vw, 4.25rem);
  --about-pad: clamp(3rem, 7vw, 6.5rem);
  --about-line: rgba(244, 241, 231, 0.16);
  background: var(--ink-green);
  color: var(--mist);
  font-family: var(--font-body);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0;
}

.page-about h1 {
  font-size: clamp(2.1rem, 6vw, 4.6rem);
  line-height: 1.02;
  letter-spacing: -0.025em;
  margin-bottom: 1.25rem;
}

.page-about h2 {
  font-size: clamp(1.55rem, 3.6vw, 2.5rem);
  line-height: 1.16;
  margin-bottom: 0.9rem;
}

.page-about h3 {
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  line-height: 1.35;
  margin-bottom: 0.4rem;
}

.page-about p {
  margin: 0 0 1rem;
  line-height: 1.8;
}

.page-about .about-section {
  padding: var(--about-pad) 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-section--line {
  border-top: 1px solid var(--about-line);
}

.page-about .about-section--sand {
  background: var(--sand);
  color: var(--charcoal);
  border-top: 2px solid var(--brown);
}

.page-about .about-section--sand h2,
.page-about .about-section--sand h3 {
  color: var(--charcoal);
}

.page-about .about-section--charcoal {
  background: var(--charcoal);
  color: var(--mist);
}

.page-about .breadcrumbs__link {
  color: var(--data-gray);
}

.page-about .eyebrow {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--lime);
  margin: 0 0 0.9rem;
}

.page-about .about-section--sand .eyebrow {
  color: var(--ember);
}

/* 首屏 */
.page-about .about-hero {
  padding: clamp(1.25rem, 3vw, 2.25rem) 0 var(--about-pad);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  margin-top: clamp(1.5rem, 4vw, 2.75rem);
}

.page-about .about-hero__rail {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
}

.page-about .about-hero__meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--data-gray);
  margin: 0;
}

.page-about .about-hero__lead {
  max-width: 48ch;
  font-size: clamp(1rem, 1.7vw, 1.12rem);
  color: rgba(244, 241, 231, 0.84);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line);
  border: 1px solid var(--about-line);
  margin: clamp(1.75rem, 4vw, 2.5rem) 0;
}

.page-about .stat {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  background: var(--ink-green);
  padding: 0.9rem 1rem;
}

.page-about .stat__value {
  font-family: var(--font-mono);
  font-size: clamp(1.45rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--lime);
  line-height: 1.1;
}

.page-about .stat__label {
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--data-gray);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-about .btn {
  font-family: var(--font-body);
  font-weight: 700;
}

.page-about .btn--ghost {
  color: var(--mist);
  border-color: rgba(244, 241, 231, 0.45);
}

.page-about .btn--ghost:hover,
.page-about .btn--ghost:focus-visible {
  border-color: var(--lime);
  color: var(--lime);
}

/* 起点叙事 */
.page-about .about-start {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-start__text p {
  max-width: 56ch;
  color: rgba(244, 241, 231, 0.86);
}

.page-about .about-quote {
  margin: clamp(1.5rem, 3vw, 2.25rem) 0 0;
  padding: 1.25rem 1.5rem;
  background: var(--sand);
  color: var(--charcoal);
  border-left: 6px solid var(--ember);
  font-family: var(--font-serif);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  line-height: 1.7;
}

.page-about .about-quote p {
  margin: 0;
  color: var(--charcoal);
}

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

.page-about .media-frame {
  position: relative;
  border: 2px solid var(--brown);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
  background: var(--charcoal);
  aspect-ratio: 4 / 3;
}

.page-about .media-frame--wide {
  aspect-ratio: 16 / 10;
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .media-frame__label {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 0.4rem 0.7rem;
  background: var(--lime);
  color: var(--charcoal);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  border-top: 2px solid var(--brown);
  border-right: 2px solid var(--brown);
}

/* 分屏骨架 */
.page-about .about-split {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
}

.page-about .year-rail {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.page-about .year-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.4rem 0.65rem;
  text-decoration: none;
  color: var(--data-gray);
  border: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .year-rail__num {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.page-about .year-rail__label {
  font-size: 0.78rem;
}

.page-about .year-rail__link:hover,
.page-about .year-rail__link:focus-visible {
  color: var(--lime);
  border-color: var(--lime);
  background: rgba(200, 245, 63, 0.08);
}

/* 时间线 */
.page-about .timeline {
  list-style: none;
  margin: clamp(1.25rem, 3vw, 2rem) 0 0;
  padding: 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .timeline__item {
  display: grid;
  gap: 0.35rem;
  padding: clamp(1.1rem, 2.6vw, 1.75rem) 0;
  border-top: 1px solid var(--about-line);
  scroll-margin-top: 6rem;
  transition: border-color 0.2s var(--ease);
}

.page-about .timeline__year {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 5vw, 3.1rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--moss);
  margin: 0;
  transition: color 0.2s var(--ease);
}

.page-about .timeline__body p {
  margin: 0;
  color: rgba(244, 241, 231, 0.82);
  max-width: 58ch;
}

.page-about .timeline__item:hover .timeline__year,
.page-about .timeline__item:focus-within .timeline__year {
  color: var(--ice);
}

.page-about .timeline__item:target {
  border-top-color: var(--lime);
}

.page-about .timeline__item:target .timeline__year {
  color: var(--lime);
}

/* 内容流程 */
.page-about .about-head {
  max-width: 62ch;
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

.page-about .about-head__note {
  color: rgba(244, 241, 231, 0.8);
  margin: 0;
}

.page-about .about-section--sand .about-head__note {
  color: rgba(21, 23, 26, 0.72);
}

.page-about .method {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-about .method__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: none;
}

.page-about .method__step {
  padding: 1.1rem 0;
  border-top: 2px solid var(--brown);
}

.page-about .method__step:first-child {
  border-top: none;
  padding-top: 0;
}

.page-about .method__num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--ember);
  margin: 0 0 0.4rem;
}

.page-about .method__step p:last-child {
  margin: 0;
  color: rgba(21, 23, 26, 0.78);
  font-size: 0.95rem;
}

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

.page-about .method__note {
  margin: clamp(1.75rem, 4vw, 2.5rem) 0 0;
  padding: 1.25rem 1.4rem;
  background: var(--ink-green);
  color: rgba(244, 241, 231, 0.9);
  border: 2px solid var(--brown);
  box-shadow: var(--shadow-hard);
  font-size: 0.95rem;
}

/* 团队 */
.page-about .team {
  display: grid;
  gap: clamp(2rem, 4vw, 3.5rem);
}

.page-about .team__big {
  font-family: var(--font-mono);
  font-size: clamp(4rem, 11vw, 7.5rem);
  font-weight: 700;
  line-height: 0.85;
  letter-spacing: -0.06em;
  color: var(--lime);
  margin: 0;
}

.page-about .team__biglabel {
  font-family: var(--font-serif);
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: rgba(244, 241, 231, 0.82);
  margin: 0.75rem 0 clamp(1.5rem, 3vw, 2rem);
}

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

.page-about .team__intro {
  color: rgba(244, 241, 231, 0.82);
  max-width: 54ch;
}

.page-about .team__row {
  padding: 1.1rem 0;
  border-top: 1px solid var(--about-line);
}

.page-about .team__row-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.4rem;
}

.page-about .team__row-head h3 {
  margin: 0;
}

.page-about .team__count {
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 3vw, 1.9rem);
  font-weight: 700;
  color: var(--lime);
  letter-spacing: -0.03em;
}

.page-about .team__row p {
  margin: 0;
  font-size: 0.95rem;
  color: rgba(244, 241, 231, 0.8);
}

/* 合作 */
.page-about .tagwall {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

.page-about .tagwall .tag {
  font-size: 0.82rem;
  padding: 0.45rem 0.85rem;
}

.page-about .honors {
  display: grid;
  gap: 1rem;
}

.page-about .honor {
  border-left: 4px solid var(--lime);
  padding: 0.3rem 0 0.3rem 1rem;
}

.page-about .honor__year {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--lime);
  margin: 0 0 0.3rem;
}

.page-about .honor__text {
  margin: 0;
  color: rgba(244, 241, 231, 0.88);
  font-size: 0.95rem;
}

/* 使用场景 */
.page-about .who {
  list-style: none;
  margin: 0;
  padding: 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .who__item {
  padding: clamp(1.25rem, 3vw, 1.9rem) 0;
  border-top: 1px solid var(--about-line);
}

.page-about .who__idx {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--lime);
  margin: 0 0 0.5rem;
}

.page-about .who__item p:last-child {
  margin: 0;
  color: rgba(244, 241, 231, 0.82);
  font-size: 0.95rem;
  max-width: 52ch;
}

/* 收尾 */
.page-about .about-cta {
  background: var(--lime);
  color: var(--charcoal);
  padding: var(--about-pad) 0;
  border-top: 2px solid var(--brown);
}

.page-about .about-cta h2 {
  color: var(--charcoal);
  max-width: 20ch;
}

.page-about .about-cta .eyebrow {
  color: var(--moss);
}

.page-about .about-cta p {
  color: rgba(21, 23, 26, 0.8);
  max-width: 58ch;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.page-about .about-cta .btn--primary {
  background: var(--charcoal);
  color: var(--mist);
  border-color: var(--charcoal);
}

.page-about .about-cta .btn--primary:hover,
.page-about .about-cta .btn--primary:focus-visible {
  background: var(--ink-green);
  border-color: var(--ink-green);
  color: var(--lime);
}

.page-about .about-cta .btn--ghost {
  color: var(--charcoal);
  border-color: var(--charcoal);
}

.page-about .about-cta .btn--ghost:hover,
.page-about .about-cta .btn--ghost:focus-visible {
  background: var(--charcoal);
  color: var(--lime);
}

@media (min-width: 760px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .honors {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.5rem;
  }

  .page-about .about-start {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: start;
  }

  .page-about .about-start__figure {
    margin-top: 2.5rem;
  }
}

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

  .page-about .about-hero__rail {
    position: sticky;
    top: 5.5rem;
    padding-left: 1.1rem;
    border-left: 2px solid var(--moss);
  }

  .page-about .about-split__rail {
    position: sticky;
    top: 5.5rem;
    align-self: start;
  }

  .page-about .year-rail {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0.15rem;
    margin-top: 0.75rem;
  }

  .page-about .year-rail__link {
    border: 1px solid transparent;
    border-left: 2px solid transparent;
  }

  .page-about .timeline__item {
    grid-template-columns: 9rem minmax(0, 1fr);
    gap: 1.75rem;
    align-items: start;
  }

  .page-about .timeline__year {
    font-size: clamp(2.6rem, 4vw, 3.6rem);
  }

  .page-about .method {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: start;
  }

  .page-about .team {
    grid-template-columns: 0.85fr 1.15fr;
    align-items: start;
    gap: clamp(2rem, 5vw, 4.5rem);
  }

  .page-about .who {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: var(--about-gap);
    border-bottom: none;
  }

  .page-about .who__item {
    border-top: 1px solid var(--about-line);
  }

  .page-about .who__item:nth-child(odd) {
    padding-right: 1.5rem;
  }

  .page-about .who__item:nth-child(even) {
    padding-left: 1.5rem;
    border-left: 1px solid var(--about-line);
    padding-top: clamp(2.5rem, 5vw, 3.75rem);
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero__lead {
    font-size: 1.15rem;
  }
}
<<<END>>>