.page-about {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.22;
  margin: 0 0 0.6em;
}

.page-about h2 {
  font-size: var(--step-3);
}

.page-about h3 {
  font-size: var(--step-1);
}

.page-about p {
  margin: 0 0 1em;
}

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

.page-about .eyebrow {
  margin-bottom: 0.75rem;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(1.25rem, 4vw, 3rem) 0 clamp(2.25rem, 6vw, 4rem);
  background:
    radial-gradient(130% 100% at 92% -10%, rgba(214, 83, 47, 0.55), rgba(214, 83, 47, 0) 62%),
    linear-gradient(165deg, var(--deep) 0%, var(--deep-2) 100%);
  color: var(--paper);
  border-bottom: 8px solid var(--flag);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -14%;
  bottom: -46%;
  width: min(420px, 70vw);
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(127, 175, 58, 0.34), rgba(127, 175, 58, 0) 70%);
  z-index: -1;
}

.page-about .about-hero .breadcrumbs {
  margin-bottom: 1.5rem;
  font-size: var(--step--1);
}

.page-about .about-hero .breadcrumbs,
.page-about .about-hero .breadcrumbs a {
  color: var(--paper-70);
}

.page-about .about-hero .breadcrumbs a:hover {
  color: var(--flag);
}

.page-about .about-hero .eyebrow {
  color: var(--flag);
}

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

.page-about .hero-copy h1 {
  font-size: var(--step-5);
  color: var(--white);
  margin-bottom: 0.5em;
}

.page-about .hero-lead {
  max-width: 46ch;
  font-size: var(--step-1);
  color: var(--paper-70);
  line-height: 1.7;
}

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

.page-about .hero-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

.page-about .hero-facts li {
  background: rgba(248, 241, 229, 0.08);
  border: 2px solid var(--paper-line);
  border-radius: var(--radius-sticker);
  padding: 0.85rem 0.9rem;
}

.page-about .fact-num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--step-2);
  font-weight: 700;
  line-height: 1.1;
  color: var(--flag);
}

.page-about .fact-label {
  display: block;
  margin-top: 0.25rem;
  font-size: var(--step--1);
  color: var(--paper-70);
  line-height: 1.5;
}

@media (min-width: 900px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: end;
  }
}

/* ---------- 起源 ---------- */
.page-about .origin {
  padding: var(--section-y) 0;
  background: var(--paper);
}

.page-about .origin-grid {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2.5rem);
}

.page-about .origin-text p {
  max-width: 60ch;
}

.page-about .origin-note {
  align-self: start;
  background: var(--sand);
  border: var(--border-ink);
  border-radius: var(--radius-sticker);
  padding: clamp(1.1rem, 3vw, 1.75rem);
  box-shadow: var(--shadow-print);
  transform: rotate(-1.2deg);
}

.page-about .note-label {
  margin: 0 0 0.5rem;
  font-size: var(--step-00);
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--ochre);
}

.page-about .note-text {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-2);
  line-height: 1.45;
  color: var(--deep);
}

@media (min-width: 880px) {
  .page-about .origin-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: center;
  }
}

/* ---------- 时间线 ---------- */
.page-about .timeline {
  padding: var(--section-y) 0 calc(var(--section-y) + 1rem);
  background: linear-gradient(180deg, var(--deep) 0%, var(--deep-2) 100%);
  color: var(--paper);
}

.page-about .timeline h2 {
  color: var(--white);
}

.page-about .timeline .eyebrow {
  color: var(--flag);
}

.page-about .timeline-lead {
  max-width: 52ch;
  color: var(--paper-70);
}

.page-about .timeline-banner {
  margin: clamp(1.25rem, 3vw, 2rem) 0 clamp(1.5rem, 4vw, 2.5rem);
  position: relative;
  border: 2px solid var(--paper-line-strong);
  border-radius: var(--radius-l) var(--radius-s) var(--radius-l) var(--radius-s);
  overflow: hidden;
}

.page-about .timeline-banner img {
  width: 100%;
  aspect-ratio: 21 / 9;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.02);
}

.page-about .timeline-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(168, 67, 43, 0.62), rgba(11, 53, 80, 0.35) 65%);
  pointer-events: none;
}

.page-about .timeline-banner .media-frame-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
  padding: 0.75rem clamp(0.9rem, 3vw, 1.5rem);
  font-size: var(--step--1);
  color: var(--white);
  background: linear-gradient(180deg, rgba(8, 42, 64, 0), rgba(8, 42, 64, 0.9));
}

.page-about .year-jump {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  margin: 0 0 1.5rem;
  padding: 0.25rem 0 0.75rem;
  scrollbar-width: none;
}

.page-about .year-jump::-webkit-scrollbar {
  display: none;
}

.page-about .year-jump a {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--deep);
  background: var(--flag);
  border: 2px solid var(--ink);
  border-radius: var(--radius-pill);
  padding: 0.2rem 0.75rem;
}

.page-about .year-jump a:focus-visible {
  outline: 3px solid var(--clover);
  outline-offset: 2px;
}

.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(1rem, 3vw, 1.6rem);
}

.page-about .tl-item {
  position: relative;
  display: grid;
  grid-template-columns: 4.5rem minmax(0, 1fr);
  gap: 0.85rem;
  align-items: start;
  scroll-margin-top: 6rem;
}

.page-about .tl-item::after {
  content: "";
  position: absolute;
  left: calc(2.25rem - 1px);
  top: 2.5rem;
  bottom: -1.4rem;
  width: 2px;
  background: linear-gradient(180deg, rgba(244, 180, 26, 0.85), rgba(168, 67, 43, 0.75));
}

.page-about .tl-item:last-child::after {
  display: none;
}

.page-about .tl-year {
  display: flex;
  align-items: flex-start;
}

.page-about .tl-year span {
  width: 100%;
  text-align: center;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--deep);
  background: var(--flag);
  border: 2px solid var(--ink);
  border-radius: var(--radius-sticker);
  padding: 0.3rem 0.2rem;
  box-shadow: 3px 3px 0 rgba(8, 42, 64, 0.65);
  transform: rotate(-2deg);
}

.page-about .tl-card {
  background: rgba(248, 241, 229, 0.07);
  border: 2px solid var(--paper-line);
  border-radius: var(--radius-sticker);
  padding: clamp(0.9rem, 2.5vw, 1.4rem);
}

.page-about .tl-item:nth-child(even) .tl-card {
  border-color: rgba(244, 180, 26, 0.55);
}

.page-about .tl-card h3 {
  color: var(--white);
  margin-bottom: 0.35em;
}

.page-about .tl-card p {
  margin: 0;
  font-size: var(--step-0);
  color: var(--paper-70);
}

@media (min-width: 900px) {
  .page-about .year-jump {
    display: none;
  }

  .page-about .tl-item {
    grid-template-columns: 7.5rem minmax(0, 1fr);
    gap: 1.5rem;
  }

  .page-about .tl-item:nth-child(even) {
    margin-left: clamp(1.5rem, 8vw, 6rem);
  }

  .page-about .tl-item::after {
    left: calc(3.75rem - 1px);
  }

  .page-about .tl-card h3 {
    font-size: var(--step-2);
  }
}

/* ---------- 内容库 ---------- */
.page-about .library {
  padding: var(--section-y) 0;
  background: var(--paper-2);
  border-bottom: 2px solid var(--line);
}

.page-about .library-lead {
  max-width: 58ch;
}

.page-about .cat-list {
  list-style: none;
  margin: clamp(1.25rem, 3vw, 2rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.7rem;
}

.page-about .cat-list li {
  background: var(--white);
  border: 2px solid var(--line-strong);
  border-radius: var(--radius-m) var(--radius-s) var(--radius-m) var(--radius-s);
  padding: 0.8rem 0.9rem;
}

.page-about .cat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--step-00);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ochre);
}

.page-about .cat-list strong {
  display: block;
  font-family: var(--font-display);
  font-size: var(--step-1);
  font-weight: 700;
  color: var(--ink);
}

.page-about .cat-desc {
  display: block;
  font-size: var(--step--1);
  color: var(--ink-70);
  line-height: 1.6;
}

.page-about .lib-metrics {
  display: grid;
  gap: var(--gap);
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
}

.page-about .metric {
  background: var(--white);
  border: var(--border-ink);
  border-radius: var(--radius-m);
  padding: 1.1rem 1.15rem;
  box-shadow: var(--shadow-print);
}

.page-about .metric:nth-child(2) {
  background: var(--mist);
  border-radius: var(--radius-sticker);
}

.page-about .metric:nth-child(3) {
  background: var(--sand);
}

.page-about .metric-num {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--step-3);
  line-height: 1.05;
  color: var(--ochre);
  margin-bottom: 0.35rem;
}

.page-about .metric h3 {
  margin-bottom: 0.4em;
  color: var(--deep);
}

.page-about .metric p {
  margin: 0;
  font-size: var(--step--1);
  color: var(--ink-70);
  line-height: 1.7;
}

@media (min-width: 640px) {
  .page-about .cat-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .lib-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .page-about .cat-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 团队 ---------- */
.page-about .team {
  padding: var(--section-y) 0;
  background: var(--paper);
}

.page-about .team-grid {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2.5rem);
}

.page-about .team-count {
  background: var(--deep);
  color: var(--paper);
  border-radius: var(--radius-l) var(--radius-s) var(--radius-l) var(--radius-s);
  padding: clamp(1.2rem, 3vw, 1.9rem);
  align-self: start;
}

.page-about .team-num {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(3.5rem, 12vw, 5.5rem);
  line-height: 1;
  color: var(--clover);
}

.page-about .team-count-text {
  margin: 0.6rem 0 0;
  font-size: var(--step-1);
  color: var(--paper-70);
}

.page-about .team-body p {
  max-width: 58ch;
}

.page-about .group-list {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.page-about .group-list li {
  border-left: 4px solid var(--clover);
  padding: 0.15rem 0 0.15rem 0.85rem;
}

.page-about .group-list strong {
  display: block;
  font-family: var(--font-display);
  font-size: var(--step-1);
  color: var(--deep);
}

.page-about .group-list span {
  display: block;
  font-size: var(--step--1);
  color: var(--ink-70);
  line-height: 1.65;
}

.page-about .partners {
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
  background: var(--sand);
  border: var(--border-ink);
  border-radius: var(--radius-sticker);
  padding: clamp(1.1rem, 3vw, 1.75rem);
  box-shadow: var(--shadow-print);
}

.page-about .partners-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--step-2);
  line-height: 1.45;
  color: var(--deep);
  margin-bottom: 0.6em;
}

.page-about .partners p {
  max-width: 62ch;
}

.page-about .partners-link {
  display: inline-block;
  font-weight: 700;
  font-size: var(--step--1);
  color: var(--ochre);
  text-decoration: none;
  border-bottom: 2px solid var(--clover);
  padding-bottom: 2px;
}

.page-about .partners-link:hover {
  color: var(--verm);
}

@media (min-width: 860px) {
  .page-about .team-grid {
    grid-template-columns: minmax(0, 0.7fr) minmax(0, 1.3fr);
    align-items: start;
  }

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

/* ---------- 通栏照片 ---------- */
.page-about .wide-banner {
  position: relative;
  margin: 0;
}

.page-about .wide-banner img {
  width: 100%;
  height: clamp(230px, 40vw, 400px);
  object-fit: cover;
}

.page-about .wide-banner figcaption {
  position: absolute;
  inset: auto 0 0 0;
  padding: clamp(1.5rem, 6vw, 3rem) var(--pad-x) clamp(1rem, 3vw, 1.5rem);
  background: linear-gradient(180deg, rgba(11, 53, 80, 0) 0%, rgba(11, 53, 80, 0.94) 78%);
  color: var(--paper);
}

.page-about .banner-line {
  margin: 0 0 0.35em;
  max-width: 34ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--step-2);
  line-height: 1.4;
  color: var(--white);
}

.page-about .banner-sub {
  margin: 0;
  max-width: 50ch;
  font-size: var(--step--1);
  color: var(--paper-70);
}

/* ---------- 服务原则 ---------- */
.page-about .principles {
  padding: var(--section-y) 0;
  background: var(--paper-2);
}

.page-about .principle-list {
  list-style: none;
  margin: clamp(1.25rem, 3vw, 2rem) 0 0;
  padding: 0;
  display: grid;
  gap: var(--gap);
}

.page-about .principle-list li {
  position: relative;
  background: var(--white);
  border: 2px solid var(--line);
  border-top: 6px solid var(--ochre);
  border-radius: var(--radius-m);
  padding: clamp(1rem, 3vw, 1.5rem);
}

.page-about .principle-list li:nth-child(2) {
  border-top-color: var(--clover);
}

.page-about .principle-list li:nth-child(3) {
  border-top-color: var(--flag);
}

.page-about .principle-index {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--step-00);
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--verm);
  margin-bottom: 0.35rem;
}

.page-about .principle-list h3 {
  color: var(--deep);
  margin-bottom: 0.4em;
}

.page-about .principle-list p {
  margin: 0;
  font-size: var(--step-0);
  color: var(--ink-70);
}

@media (min-width: 820px) {
  .page-about .principle-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .principle-list li:nth-child(2) {
    transform: translateY(1.25rem);
  }
}

/* ---------- 数字背后 ---------- */
.page-about .numbers {
  padding: var(--section-y) 0;
  background: var(--mist);
}

.page-about .numbers-grid {
  display: grid;
  gap: clamp(1.25rem, 3vw, 2.5rem);
}

.page-about .numbers-text h2 {
  color: var(--deep);
}

.page-about .stat-block {
  border-left: 6px solid var(--clover);
  padding-left: clamp(0.75rem, 2vw, 1.1rem);
  margin-bottom: 1.5rem;
}

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

.page-about .stat-num {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: var(--step-4);
  line-height: 1.05;
  color: var(--ochre);
  margin-bottom: 0.25rem;
}

.page-about .stat-block p {
  margin: 0;
  max-width: 46ch;
  font-size: var(--step-0);
  color: var(--ink-70);
}

.page-about .numbers-photo {
  margin: 0;
  position: relative;
  border: 2px solid var(--ink);
  border-radius: var(--radius-sticker);
  overflow: hidden;
  box-shadow: var(--shadow-print);
  align-self: start;
}

.page-about .numbers-photo img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-about .numbers-photo .media-frame-caption {
  padding: 0.7rem 0.9rem;
  font-size: var(--step--1);
  color: var(--paper);
  background: var(--deep);
}

@media (min-width: 860px) {
  .page-about .numbers-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }
}

/* ---------- 结尾 CTA ---------- */
.page-about .cta {
  padding: var(--section-y) 0;
  background:
    radial-gradient(120% 120% at 10% 0%, rgba(11, 53, 80, 0.5), rgba(11, 53, 80, 0) 60%),
    var(--ochre);
  color: var(--white);
}

.page-about .cta h2 {
  color: var(--white);
}

.page-about .cta-lead {
  max-width: 46ch;
  color: rgba(255, 255, 255, 0.86);
}

.page-about .next-links {
  list-style: none;
  margin: clamp(1.25rem, 3vw, 2rem) 0 0;
  padding: 0;
  display: grid;
  gap: 0.8rem;
}

.page-about .next-link {
  display: block;
  height: 100%;
  background: var(--paper);
  border: 2px solid var(--ink);
  border-radius: var(--radius-m) var(--radius-s) var(--radius-m) var(--radius-s);
  padding: 1rem 1.1rem;
  text-decoration: none;
  color: var(--ink);
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .next-link strong {
  display: block;
  font-family: var(--font-display);
  font-size: var(--step-1);
  font-weight: 700;
  color: var(--deep);
  margin-bottom: 0.25em;
}

.page-about .next-link span {
  display: block;
  font-size: var(--step--1);
  line-height: 1.65;
  color: var(--ink-70);
}

.page-about .next-link:hover,
.page-about .next-link:focus-visible {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
}

.page-about .next-link:focus-visible {
  outline: 3px solid var(--flag);
  outline-offset: 2px;
}

@media (min-width: 700px) {
  .page-about .next-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1040px) {
  .page-about .next-links {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .origin-note,
  .page-about .tl-year span,
  .page-about .principle-list li:nth-child(2) {
    transform: none;
  }

  .page-about .next-link {
    transition: none;
  }

  .page-about .next-link:hover,
  .page-about .next-link:focus-visible {
    transform: none;
  }
}
<<<END>>>