.page-about {
  --about-hair: rgba(11, 46, 69, 0.14);
  --about-grid: rgba(11, 46, 69, 0.07);
  --about-ink-soft: rgba(11, 46, 69, 0.72);
  display: block;
  background: var(--paper);
  color: var(--ink);
}

/* ---------- 顶部上下文 ---------- */
.page-about .about-topbar {
  padding-top: calc(var(--header-space) + 12px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(18px, 3vw, 32px) clamp(30px, 5vw, 56px);
  border-bottom: 2px solid var(--ink-blue);
  background:
    radial-gradient(circle at 88% 12%, rgba(22, 139, 196, 0.14), transparent 55%),
    radial-gradient(circle at 6% 88%, rgba(14, 122, 74, 0.12), transparent 52%),
    var(--paper);
}

.page-about .hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 44px);
  align-items: start;
}

.page-about .hero-copy h1 {
  margin: 12px 0 0;
  font-size: clamp(30px, 6.4vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--ink-blue);
  text-wrap: balance;
}

.page-about .hero-lead {
  margin: 18px 0 0;
  max-width: 44em;
  font-size: clamp(15px, 1.9vw, 17px);
  line-height: 1.78;
  color: var(--about-ink-soft);
}

.page-about .hero-lead--secondary {
  margin-top: 12px;
  padding-left: 14px;
  border-left: 3px solid var(--grass);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .hero-visual {
  position: relative;
  margin: 0;
  border: 2px solid var(--ink-blue);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
  background: var(--ink-blue);
  isolation: isolate;
}

.page-about .hero-visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .hero-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(155deg, rgba(14, 122, 74, 0.42), rgba(22, 139, 196, 0.16) 52%, rgba(11, 46, 69, 0.62));
  pointer-events: none;
}

.page-about .hero-visual__tag {
  position: absolute;
  left: 14px;
  bottom: 14px;
  z-index: 2;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  background: var(--paper);
  border: 2px solid var(--ink-blue);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  font-weight: 700;
  color: var(--ink-blue);
}

/* 首屏数据条 */
.page-about .hero-facts {
  list-style: none;
  margin: clamp(24px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-hair);
  border: 2px solid var(--ink-blue);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-about .hero-fact {
  background: var(--paper);
  padding: 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .hero-fact__num {
  font-size: clamp(24px, 5vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--grass);
}

.page-about .hero-fact__label {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--about-ink-soft);
}

/* ---------- 品牌起点 ---------- */
.page-about .about-origin {
  padding-block: clamp(34px, 5vw, 64px);
  background: var(--paper);
}

.page-about .origin-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
}

.page-about .origin-copy h2 {
  margin: 10px 0 0;
  font-size: clamp(24px, 4.4vw, 38px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  font-weight: 900;
  color: var(--ink-blue);
}

.page-about .origin-copy p {
  margin: 16px 0 0;
  max-width: 40em;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .origin-panel {
  position: relative;
  padding: clamp(18px, 3vw, 26px);
  border: 2px solid var(--ink-blue);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-hard-sm);
  background:
    linear-gradient(160deg, rgba(14, 122, 74, 0.1), rgba(22, 139, 196, 0.1) 65%, rgba(22, 139, 196, 0));
}

.page-about .origin-panel__label {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  font-weight: 700;
  color: var(--grass-deep);
}

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

.page-about .origin-list li {
  display: grid;
  grid-template-columns: 4.6em minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--about-hair);
}

.page-about .origin-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .origin-list strong {
  display: inline-block;
  padding: 3px 0;
  font-size: 14px;
  font-weight: 800;
  color: var(--orange-deep);
  letter-spacing: 0.04em;
}

.page-about .origin-list span {
  font-size: 14px;
  line-height: 1.72;
  color: var(--about-ink-soft);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline-section {
  padding-block: clamp(34px, 5vw, 64px);
  background: var(--field);
  border-block: 2px solid var(--ink-blue);
}

.page-about .timeline-head {
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .timeline-head h2 {
  margin: 10px 0 0;
  font-size: clamp(24px, 4.4vw, 38px);
  line-height: 1.15;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--ink-blue);
}

.page-about .timeline-intro {
  margin: 14px 0 0;
  max-width: 42em;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 4px 0 0;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(to bottom, var(--grass), var(--sky) 55%, var(--orange));
}

.page-about .timeline-item {
  position: relative;
  padding-left: 32px;
  padding-bottom: clamp(18px, 3vw, 28px);
}

.page-about .timeline-item:last-child {
  padding-bottom: 0;
}

.page-about .timeline-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  width: 12px;
  height: 12px;
  border-radius: var(--radius-s);
  background: var(--paper);
  border: 2px solid var(--ink-blue);
}

.page-about .timeline-card {
  padding: clamp(14px, 2.6vw, 22px);
  background: var(--paper);
  border: 2px solid var(--ink-blue);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-hard-sm);
  transition: transform 0.22s var(--ease), box-shadow 0.22s var(--ease);
}

.page-about .timeline-card:hover,
.page-about .timeline-card:focus-within {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hard);
}

.page-about .timeline-card__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}

.page-about .timeline-year {
  font-size: clamp(22px, 4.4vw, 30px);
  font-weight: 700;
  line-height: 1;
  color: var(--grass);
  letter-spacing: -0.02em;
}

.page-about .timeline-card h3 {
  margin: 0 0 8px;
  font-size: clamp(17px, 2.4vw, 20px);
  font-weight: 800;
  color: var(--ink-blue);
}

.page-about .timeline-card p {
  margin: 0;
  max-width: 46em;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--about-ink-soft);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding-block: clamp(34px, 5vw, 64px);
  background: var(--paper);
}

.page-about .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .team-visual {
  margin: 0;
}

.page-about .team-visual .media-frame {
  border: 2px solid var(--ink-blue);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-hard);
  overflow: hidden;
  background: var(--mist);
}

.page-about .team-visual figcaption,
.page-about .work-visual figcaption,
.page-about .coverage-map figcaption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--about-ink-soft);
}

.page-about .team-copy h2 {
  margin: 10px 0 0;
  font-size: clamp(24px, 4.4vw, 38px);
  line-height: 1.15;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--ink-blue);
}

.page-about .team-copy > p {
  margin: 14px 0 0;
  max-width: 42em;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .team-roles {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .team-role {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 16px;
  background: var(--paper);
  border: 2px solid var(--ink-blue);
  border-left-width: 6px;
  border-radius: var(--radius-s);
}

.page-about .team-role__index {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--sky);
}

.page-about .team-role h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 800;
  color: var(--ink-blue);
}

.page-about .team-role p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--about-ink-soft);
}

/* ---------- 覆盖 ---------- */
.page-about .about-coverage {
  padding-block: clamp(34px, 5vw, 64px);
  border-block: 2px solid var(--ink-blue);
}

.page-about .coverage-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .coverage-copy h2 {
  margin: 10px 0 0;
  font-size: clamp(24px, 4.4vw, 38px);
  line-height: 1.15;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--ink-blue);
}

.page-about .coverage-copy p {
  margin: 14px 0 0;
  max-width: 42em;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .coverage-notes {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .coverage-notes li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  padding: 10px 14px;
  background: var(--paper);
  border: 2px solid var(--ink-blue);
  border-radius: var(--radius-s);
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--about-ink-soft);
}

.page-about .coverage-notes .num {
  font-weight: 700;
  font-size: 18px;
  color: var(--grass-deep);
}

.page-about .coverage-map {
  margin: 0;
}

.page-about .coverage-map__frame {
  border: 2px solid var(--ink-blue);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-hard);
  background:
    linear-gradient(var(--about-grid) 1px, transparent 1px) 0 0 / 100% 28px,
    linear-gradient(90deg, var(--about-grid) 1px, transparent 1px) 0 0 / 28px 100%,
    linear-gradient(150deg, var(--paper), var(--field) 70%, var(--mist));
  overflow: hidden;
  padding: 10px;
}

.page-about .coverage-map svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .map-links path {
  stroke: url(#aboutCoverGrad);
  stroke: var(--sky);
  stroke-opacity: 0.7;
  stroke-dasharray: 5 5;
}

.page-about .map-dots circle {
  fill: var(--sky);
  stroke: var(--paper);
  stroke-width: 1.5;
}

.page-about .map-origin circle:first-child {
  fill: var(--orange);
  fill-opacity: 0.24;
}

.page-about .map-origin circle:last-child {
  fill: var(--orange);
  stroke: var(--paper);
  stroke-width: 2;
}

.page-about .map-label {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  fill: var(--ink-blue);
}

.page-about .map-label--sm {
  font-size: 9px;
  fill: var(--about-ink-soft);
  letter-spacing: 0.08em;
}

/* ---------- 合作 ---------- */
.page-about .about-partners {
  padding-block: clamp(34px, 5vw, 64px);
  background: var(--paper);
}

.page-about .partners-head h2 {
  margin: 10px 0 0;
  font-size: clamp(24px, 4.4vw, 38px);
  line-height: 1.15;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--ink-blue);
}

.page-about .partners-intro {
  margin: 14px 0 0;
  max-width: 44em;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .partner-types {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.5vw, 22px);
  margin-top: clamp(24px, 4vw, 38px);
}

.page-about .partner-card {
  position: relative;
  padding: clamp(16px, 2.6vw, 24px);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .partner-card__index {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--orange-deep);
}

.page-about .partner-card h3 {
  margin: 0;
  font-size: clamp(17px, 2.4vw, 20px);
  font-weight: 800;
  color: var(--ink-blue);
}

.page-about .partner-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-ink-soft);
}

.page-about .partner-card__note {
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px dashed var(--about-hair);
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: var(--grass-deep);
}

.page-about .partners-cta {
  margin-top: clamp(22px, 3.5vw, 34px);
  padding: clamp(16px, 2.6vw, 24px);
  border: 2px solid var(--ink-blue);
  border-radius: var(--radius-m);
  background:
    linear-gradient(120deg, rgba(255, 210, 63, 0.28), rgba(255, 106, 26, 0.12) 60%, transparent);
  display: grid;
  gap: 16px;
}

.page-about .partners-cta p {
  margin: 0;
  max-width: 42em;
  line-height: 1.78;
  color: var(--ink-blue);
  font-weight: 500;
}

.page-about .partners-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 工作方式 ---------- */
.page-about .about-work {
  padding-block: clamp(34px, 5vw, 64px);
  background: var(--field);
  border-top: 2px solid var(--ink-blue);
}

.page-about .work-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .work-copy h2 {
  margin: 10px 0 0;
  font-size: clamp(24px, 4.4vw, 38px);
  line-height: 1.15;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--ink-blue);
}

.page-about .work-copy > p {
  margin: 14px 0 0;
  max-width: 42em;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

.page-about .work-steps {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .work-step {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 16px;
  background: var(--paper);
  border: 2px solid var(--ink-blue);
  border-radius: var(--radius-s);
}

.page-about .work-step__num {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--sky);
}

.page-about .work-step h3 {
  margin: 0 0 5px;
  font-size: 15.5px;
  font-weight: 800;
  color: var(--ink-blue);
}

.page-about .work-step p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--about-ink-soft);
}

.page-about .work-aside {
  display: grid;
  gap: clamp(16px, 2.5vw, 22px);
}

.page-about .work-visual {
  margin: 0;
}

.page-about .work-visual .media-frame {
  border: 2px solid var(--ink-blue);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-hard-sm);
  overflow: hidden;
  background: var(--ink-blue);
}

.page-about .work-panel {
  padding: clamp(16px, 2.6vw, 22px);
  background: var(--ink-blue);
  border: 2px solid var(--ink-blue);
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-hard-sm);
  color: var(--paper);
}

.page-about .work-panel__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  font-weight: 700;
  color: var(--yellow);
}

.page-about .work-panel__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .work-panel__list li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.72;
  color: rgba(250, 248, 242, 0.86);
}

.page-about .work-panel__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background: var(--yellow);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  padding-block: clamp(30px, 5vw, 56px) clamp(40px, 6vw, 72px);
  background: var(--paper);
  border-top: 2px solid var(--ink-blue);
}

.page-about .next-panel {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  padding: clamp(20px, 3.4vw, 34px);
  border: 2px solid var(--ink-blue);
  border-radius: var(--radius-l);
  box-shadow: var(--shadow-hard);
  background:
    radial-gradient(circle at 92% 8%, rgba(22, 139, 196, 0.16), transparent 58%),
    radial-gradient(circle at 4% 96%, rgba(14, 122, 74, 0.14), transparent 55%),
    var(--paper);
}

.page-about .next-copy h2 {
  margin: 10px 0 0;
  font-size: clamp(23px, 4.2vw, 34px);
  line-height: 1.18;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--ink-blue);
}

.page-about .next-copy p {
  margin: 12px 0 0;
  max-width: 40em;
  line-height: 1.78;
  color: var(--about-ink-soft);
}

.page-about .next-links {
  display: grid;
  gap: 10px;
}

.page-about .next-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  background: var(--paper);
  border: 2px solid var(--ink-blue);
  border-radius: var(--radius-s);
  color: var(--ink-blue);
  text-decoration: none;
  font-weight: 700;
  font-size: 14.5px;
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .next-link__index {
  font-size: 12px;
  font-weight: 700;
  color: var(--orange-deep);
  letter-spacing: 0.08em;
}

.page-about .next-link__text {
  flex: 1;
}

.page-about .next-link:hover,
.page-about .next-link:focus-visible {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hard-sm);
  background: var(--field);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .hero-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .hero-fact {
    padding: 18px 16px;
  }

  .page-about .partner-types {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: stretch;
  }

  .page-about .partners-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

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

@media (min-width: 900px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: center;
  }

  .page-about .hero-visual {
    transform: translateY(-6px);
  }

  .page-about .origin-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-about .timeline-item {
    padding-left: 40px;
    padding-bottom: clamp(22px, 3vw, 32px);
  }

  .page-about .about-timeline::before {
    left: 6px;
  }

  .page-about .timeline-card {
    max-width: 620px;
  }

  .page-about .timeline-item:nth-child(even) .timeline-card {
    margin-left: clamp(24px, 6vw, 88px);
  }

  .page-about .team-grid {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .team-visual {
    position: sticky;
    top: calc(var(--header-space) + 24px);
  }

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

  .page-about .coverage-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.95fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: center;
  }

  .page-about .work-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .next-panel {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .timeline-card,
  .page-about .next-link {
    transition: none;
  }

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