.page-about {
  padding-bottom: 72px;
}

.page-about .breadcrumb {
  margin: 22px 0 10px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 12px 0 44px;
  border-bottom: 1px solid var(--line);
  background: radial-gradient(120% 92% at 84% -22%, rgba(59, 240, 196, 0.1), transparent 58%);
}

.page-about .about-hero-inner {
  display: grid;
  gap: 18px;
  max-width: 62rem;
}

.page-about .page-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 8.2vw, 54px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .lede {
  margin: 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .hero-stat {
  padding: 14px 16px 13px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--ink-2);
}

.page-about .hero-stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

.page-about .hero-stat-label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--muted);
}

/* ---------- 图片容器 ---------- */
.page-about .media-frame {
  margin: 0;
  overflow: hidden;
}

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

.page-about .about-media {
  margin: 26px 0 30px;
}

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

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 12px;
  bottom: 26px;
  width: 1px;
  background: var(--tick);
}

.page-about .timeline-item {
  position: relative;
  padding-left: 38px;
  padding-bottom: 12px;
}

.page-about .timeline-details {
  border-radius: var(--r-md);
}

.page-about .timeline-summary {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 13px 16px;
  border: 1px solid transparent;
  border-radius: var(--r-md);
  background: var(--ink-2);
  cursor: pointer;
  list-style: none;
  transition: border-color 180ms var(--ease), background 180ms var(--ease);
}

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

.page-about .timeline-summary:hover {
  border-color: var(--tick);
}

.page-about .timeline-summary::before {
  content: "";
  position: absolute;
  left: -33px;
  top: 50%;
  width: 13px;
  height: 13px;
  margin-top: -7px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--tick);
  transition: background 180ms var(--ease), border-color 180ms var(--ease), box-shadow 180ms var(--ease);
}

.page-about .timeline-details[open] > .timeline-summary {
  border-color: rgba(59, 240, 196, 0.24);
}

.page-about .timeline-details[open] > .timeline-summary::before {
  background: var(--cyan);
  border-color: var(--cyan);
  box-shadow: 0 0 0 4px rgba(59, 240, 196, 0.14);
}

.page-about .timeline-year {
  flex: none;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

.page-about .timeline-head {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .timeline-body {
  padding: 12px 16px 6px;
  max-width: 38em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .timeline-body p {
  margin: 0 0 8px;
}

/* ---------- 内容生产 ---------- */
.page-about .process-grid {
  display: grid;
  gap: 22px;
}

.page-about .process-copy .section-title {
  margin: 0 0 12px;
}

.page-about .process-copy .section-desc {
  margin: 0;
  max-width: 34em;
}

.page-about .flow {
  display: grid;
  gap: 12px;
  margin-top: 28px;
}

.page-about .flow-stage {
  position: relative;
  padding: 18px 18px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--ink-2);
  transition: transform 180ms var(--ease), border-color 180ms var(--ease), box-shadow 180ms var(--ease);
}

.page-about .flow-stage:hover,
.page-about .flow-stage:focus-within {
  transform: translateY(-2px);
  border-color: rgba(59, 240, 196, 0.42);
  box-shadow: 0 14px 30px -20px rgba(59, 240, 196, 0.85);
}

.page-about .flow-index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .flow-title {
  margin: 6px 0 8px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .flow-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .flow-meta {
  display: block;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px dashed var(--tick);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--cyan);
  opacity: 0.8;
  transition: opacity 180ms var(--ease);
}

.page-about .flow-stage:hover .flow-meta,
.page-about .flow-stage:focus-within .flow-meta {
  opacity: 1;
}

/* ---------- 覆盖版图 ---------- */
.page-about .reach-grid {
  display: grid;
  gap: 22px;
  margin-top: 4px;
}

.page-about .stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .stat-card {
  padding: 16px 16px 15px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--ink-2);
}

.page-about .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 500;
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

.page-about .stat-label {
  display: block;
  margin-top: 7px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--muted);
}

.page-about .team-bars {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.page-about .team-bars-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-about .team-bar-row {
  display: grid;
  gap: 6px;
}

.page-about .team-bar-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  font-size: 13px;
  color: var(--paper);
}

.page-about .team-bar-count {
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

.page-about .team-bar-track {
  height: 9px;
  border-radius: var(--r-pill);
  background: var(--tick);
  overflow: hidden;
}

.page-about .team-bar-fill {
  display: block;
  height: 100%;
  border-radius: var(--r-pill);
  background: var(--cyan);
  transition: filter 180ms var(--ease);
}

.page-about .team-bar-fill--a {
  width: 26.2%;
}

.page-about .team-bar-fill--b {
  width: 21.4%;
}

.page-about .team-bar-fill--c {
  width: 52.4%;
  background: var(--orange);
}

.page-about .team-bar-row:hover .team-bar-fill {
  filter: brightness(1.18);
}

/* ---------- 合作生态 ---------- */
.page-about .partner-strip {
  display: grid;
  gap: 12px;
  margin-top: 4px;
}

.page-about .partner-card {
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, var(--ink-2) 0%, rgba(16, 42, 34, 0.55) 100%);
}

.page-about .partner-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 500;
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
  color: var(--orange);
}

.page-about .partner-title {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .partner-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 坚持 ---------- */
.page-about .principle-grid {
  display: grid;
  gap: 14px;
  margin-top: 4px;
}

.page-about .principle-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px 24px;
  border-radius: var(--r-xl);
  background: var(--paper);
  color: var(--ink);
}

.page-about .principle-index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--orange-dark);
}

.page-about .principle-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .principle-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-2);
}

/* ---------- 尾部入口 ---------- */
.page-about .about-more-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background: var(--ink-2);
}

.page-about .about-more-text {
  margin: 0;
  max-width: 30em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper);
}

.page-about .about-more-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}

.page-about .about-text-link {
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
  border-bottom: 1px solid var(--tick);
  padding-bottom: 2px;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-about .about-text-link:hover,
.page-about .about-text-link:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .timeline-summary {
    gap: 16px;
  }
}

@media (min-width: 820px) {
  .page-about .flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .flow-stage:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 44px;
    right: -20px;
    width: 20px;
    height: 1px;
    background: var(--tick);
  }

  .page-about .partner-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

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

@media (min-width: 900px) {
  .page-about .process-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
    gap: 36px;
  }

  .page-about .reach-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: start;
    gap: 32px;
  }

  .page-about .about-media {
    margin: 30px 0 38px;
  }

  .page-about .timeline-item {
    padding-left: 46px;
  }

  .page-about .timeline::before {
    left: 13px;
  }

  .page-about .timeline-summary::before {
    left: -41px;
    width: 15px;
    height: 15px;
    margin-top: -8px;
  }

  .page-about .about-more-inner {
    padding: 28px 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .timeline-summary,
  .page-about .timeline-summary::before,
  .page-about .flow-stage,
  .page-about .flow-meta,
  .page-about .team-bar-fill,
  .page-about .about-text-link {
    transition: none;
  }

  .page-about .flow-stage:hover,
  .page-about .flow-stage:focus-within {
    transform: none;
  }
}
<<<PAGE_CSS_END>>>