.page-about {
  --about-rail: 132px;
  --about-sticky: 104px;
  --about-tint: rgba(200, 255, 61, 0.12);
  --about-warm: rgba(255, 107, 44, 0.14);
  display: block;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(22px, 4vw, 40px) clamp(44px, 6vw, 76px);
  background:
    radial-gradient(115% 78% at 84% 0%, var(--about-tint), transparent 62%),
    radial-gradient(90% 62% at 4% 100%, var(--about-warm), transparent 60%);
  border-bottom: 1px solid var(--line-soft);
  overflow: hidden;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(18px, 3vw, 32px);
}

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

.page-about .about-hero-copy .eyebrow {
  margin-bottom: 14px;
}

.page-about .about-hero-copy .display-title {
  margin: 0 0 clamp(14px, 2vw, 22px);
  line-height: 1.02;
}

.page-about .about-hero-copy .lead {
  max-width: 46ch;
}

.page-about .about-hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-hero-media {
  margin: 0;
  border: 1px solid var(--line);
}

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

.page-about .about-hero-media figcaption {
  padding: 10px 14px;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--text-mute);
  border-top: 1px solid var(--line);
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .about-figures li {
  padding: 16px 18px;
  background: var(--panel-deep);
}

.page-about .fig-num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.4rem, 3.4vw, 2rem);
  line-height: 1.1;
  color: var(--volt);
  font-variant-numeric: tabular-nums;
}

.page-about .fig-label {
  display: block;
  margin-top: 4px;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--text-mute);
}

/* ---------- 通用章节 ---------- */
.page-about .section {
  position: relative;
}

.page-about .section-head {
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-about .section-head .lead {
  max-width: 60ch;
}

/* ---------- 时间线 ---------- */
.page-about .phase-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(20px, 3vw, 38px);
}

.page-about .phase {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .phase-year {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-left: 2px;
}

.page-about .phase-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  line-height: 1;
  color: var(--volt);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.01em;
}

.page-about .phase-tag {
  padding: 3px 10px;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--ink);
  background: var(--volt-soft);
  border-radius: var(--pill);
}

.page-about .phase-body {
  padding: clamp(20px, 3vw, 30px);
  border-left: 3px solid var(--volt);
}

.page-about .phase-body h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(1.25rem, 3.2vw, 1.7rem);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--mist);
}

.page-about .phase-body p {
  margin: 0;
  color: var(--text-dim);
}

.page-about .phase-points {
  display: grid;
  gap: 8px;
  margin: 16px 0 0;
  padding: 16px 0 0;
  list-style: none;
  border-top: 1px dashed var(--line);
  font-size: 0.9rem;
  color: var(--text-mute);
}

.page-about .phase-points li {
  position: relative;
  padding-left: 18px;
}

.page-about .phase-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 8px;
  background: var(--flare);
  transform: rotate(45deg) scale(0.8);
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .team-card {
  padding: clamp(20px, 3vw, 26px);
}

.page-about .team-count {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--steel);
}

.page-about .team-count .num {
  font-size: clamp(1.9rem, 5vw, 2.6rem);
  color: var(--flare);
  margin-right: 4px;
}

.page-about .team-card h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
  color: var(--mist);
}

.page-about .team-card p:last-child {
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-dim);
}

.page-about .team-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 34px);
  align-items: center;
  margin-top: clamp(20px, 3vw, 34px);
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(160deg, var(--panel) 0%, var(--panel-deep) 100%);
}

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

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

.page-about .team-band-copy h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 3vw, 1.55rem);
  color: var(--volt);
}

.page-about .team-band-copy p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.95rem;
}

.page-about .team-notes {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-mute);
}

.page-about .team-notes li {
  padding-left: 14px;
  border-left: 2px solid var(--line);
}

/* ---------- 覆盖范围 ---------- */
.page-about .coverage-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 40px);
  align-items: start;
}

.page-about .coverage-media {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
}

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

.page-about .map-legend {
  display: grid;
  gap: 14px;
  margin: 0 0 clamp(20px, 3vw, 28px);
  padding: 0;
  list-style: none;
}

.page-about .map-legend li {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  font-size: 0.9rem;
  color: var(--text-dim);
}

.page-about .map-legend svg {
  color: var(--volt);
  margin-top: 3px;
}

.page-about .map-legend li:nth-child(2) svg { color: var(--flare); }
.page-about .map-legend li:nth-child(3) svg { color: var(--steel); }

.page-about .map-legend strong {
  display: block;
  color: var(--mist);
  font-weight: 600;
  margin-bottom: 2px;
}

.page-about .coverage-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--line-soft);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-about .coverage-stats > div {
  padding: 14px 16px;
  background: var(--panel-deep);
}

.page-about .coverage-stats dt {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--text-mute);
}

.page-about .coverage-stats dd {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.3rem, 3.4vw, 1.75rem);
  color: var(--volt-soft);
  font-variant-numeric: tabular-nums;
}

.page-about .coverage-note {
  margin: 18px 0 0;
  font-size: 0.86rem;
  color: var(--text-mute);
  border-left: 2px solid var(--flare);
  padding-left: 12px;
}

.page-about .coverage-note a {
  color: var(--volt);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 255, 61, 0.4);
}

/* ---------- 档案抽屉 ---------- */
.page-about .archive-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 32px);
  padding: clamp(18px, 3vw, 30px);
  border-radius: var(--r-lg);
  color: var(--ink);
}

.page-about .archive-panel a {
  color: #1F4A2E;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .archive-list {
  display: grid;
  gap: 10px;
}

.page-about .archive-item {
  border: 1px solid rgba(8, 11, 10, 0.24);
  border-radius: var(--r-sm);
  background: rgba(243, 246, 238, 0.62);
  overflow: hidden;
}

.page-about .archive-item summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 15px;
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  font-size: 0.95rem;
  color: #141A17;
}

.page-about .archive-item summary::-webkit-details-marker {
  display: none;
}

.page-about .archive-item summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: #2B352F;
}

.page-about .archive-item[open] summary::after {
  content: "–";
}

.page-about .archive-idx {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: #4A5A46;
}

.page-about .archive-name {
  letter-spacing: 0.02em;
}

.page-about .archive-item p {
  margin: 0;
  padding: 0 15px 15px;
  font-size: 0.9rem;
  line-height: 1.7;
  color: #2B352F;
}

.page-about .archive-side {
  display: grid;
  gap: 10px;
  align-content: start;
  padding-left: 0;
  border-left: 0;
}

.page-about .archive-figure {
  margin: 0;
  font-size: 0.88rem;
  color: #2B352F;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.5);
  border: 1px dashed rgba(8, 11, 10, 0.3);
  border-radius: var(--r-sm);
}

.page-about .archive-figure .num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.15rem;
  color: #141A17;
  margin-right: 6px;
}

.page-about .archive-help {
  margin: 6px 0 0;
  font-size: 0.85rem;
  line-height: 1.7;
  color: #3A4536;
}

/* ---------- 运营结果 ---------- */
.page-about .result-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .result-card {
  padding: clamp(16px, 3vw, 24px);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(150deg, rgba(255, 107, 44, 0.08), transparent 62%), var(--panel-deep);
}

.page-about .result-num {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.5rem, 4.2vw, 2.1rem);
  line-height: 1.1;
  color: var(--flare);
  font-variant-numeric: tabular-nums;
}

.page-about .result-card h3 {
  margin: 0 0 6px;
  font-size: 0.95rem;
  color: var(--mist);
}

.page-about .result-card p {
  margin: 0;
  font-size: 0.82rem;
  color: var(--text-mute);
}

.page-about .results-foot {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 16px 18px;
  font-size: 0.9rem;
  color: var(--text-dim);
  border: 1px solid var(--line);
  border-left: 3px solid var(--volt);
  border-radius: var(--r-sm);
  background: var(--panel);
}

.page-about .results-foot a {
  color: var(--volt);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 255, 61, 0.4);
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  padding-bottom: clamp(36px, 5vw, 64px);
}

.page-about .cta-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 30px);
  align-items: center;
  padding: clamp(22px, 4vw, 38px);
  border-radius: var(--r-lg);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(200, 255, 61, 0.18), transparent 62%),
    var(--panel);
  border: 1px solid var(--line);
}

.page-about .cta-copy .section-title {
  margin: 0 0 8px;
}

.page-about .cta-copy p {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.92rem;
}

.page-about .cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

/* ---------- 悬停细节 ---------- */
.page-about .phase-body:hover,
.page-about .team-card:hover,
.page-about .result-card:hover {
  border-color: rgba(200, 255, 61, 0.36);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-figures {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .phase-points {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .result-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
  }
  .page-about .about-figures {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
  .page-about .phase {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(24px, 3vw, 48px);
    align-items: start;
  }
  .page-about .phase-year {
    position: sticky;
    top: var(--about-sticky);
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
    padding-top: 6px;
    border-right: 1px solid var(--line);
    padding-right: 16px;
  }
  .page-about .team-band {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  }
  .page-about .coverage-grid {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
    gap: clamp(28px, 4vw, 52px);
  }
  .page-about .coverage-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .archive-panel {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.65fr);
    gap: clamp(24px, 3vw, 40px);
  }
  .page-about .archive-side {
    padding-left: clamp(18px, 2vw, 28px);
    border-left: 1px dashed rgba(8, 11, 10, 0.3);
  }
  .page-about .result-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .cta-band {
    grid-template-columns: minmax(0, 1fr) auto;
  }
  .page-about .cta-links {
    justify-content: flex-end;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .phase-body,
  .page-about .team-card,
  .page-about .result-card {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>