.page-about {
  --about-rail: 208px;
  background: var(--obsidian);
  color: var(--text-1);
  padding-top: calc(var(--header-h) + clamp(1rem, 3vw, 2.25rem));
  padding-bottom: clamp(3rem, 7vw, 6rem);
}

.page-about .breadcrumbs {
  margin-bottom: clamp(1.5rem, 4vw, 2.75rem);
  font-size: 0.82rem;
}
.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
  color: var(--text-3);
}
.page-about .breadcrumb-list li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--text-3);
}
.page-about .breadcrumb-list a {
  color: var(--text-2);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}
.page-about .breadcrumb-list a:hover,
.page-about .breadcrumb-list a:focus-visible {
  color: var(--gold-soft);
  border-bottom-color: var(--gold-soft);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-bottom: clamp(2.25rem, 6vw, 4.5rem);
}
.page-about .about-hero-grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3.5rem);
  align-items: center;
}
.page-about .about-hero-copy h1 {
  font-family: var(--font-heading);
  font-size: clamp(1.95rem, 4.6vw, 3.2rem);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -0.01em;
  margin: 0 0 1.2rem;
  color: var(--text-1);
  max-width: 18em;
}
.page-about .about-hero-copy .lede {
  font-size: clamp(1rem, 1.6vw, 1.18rem);
  line-height: 1.8;
  color: var(--text-2);
  max-width: 34em;
  margin: 0 0 1.85rem;
}
.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.page-about .about-hero-figure {
  position: relative;
  border: 1px solid var(--hair);
  background: var(--ink);
}
.page-about .about-hero-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(158deg, rgba(242, 204, 119, 0.18), rgba(18, 160, 138, 0.08) 46%, transparent 72%);
  pointer-events: none;
}
.page-about .about-hero-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-about .about-hero-figure .media-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 1.6rem 1.1rem 0.85rem;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--text-1);
  background: linear-gradient(180deg, transparent, rgba(11, 12, 14, 0.88));
}

/* ---------- 长文骨架 ---------- */
.page-about .story-body {
  display: grid;
  gap: clamp(2rem, 5vw, 3.25rem);
  border-top: 1px solid var(--hair);
  padding-top: clamp(2rem, 5vw, 3.5rem);
}

.page-about .chapter-rail {
  display: none;
}
.page-about .rail-title {
  margin: 0 0 0.85rem;
  font-family: var(--font-accent);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.28em;
  color: var(--text-3);
  text-transform: uppercase;
}
.page-about .rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .rail-link {
  display: block;
  padding: 0.42rem 0;
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--text-2);
  text-decoration: none;
  transition: color 0.18s var(--ease);
}
.page-about .rail-link::before {
  content: "";
  display: inline-block;
  width: 12px;
  height: 1px;
  margin-right: 0.55rem;
  vertical-align: middle;
  background: currentColor;
  opacity: 0.45;
  transition: width 0.22s var(--ease), opacity 0.22s var(--ease);
}
.page-about .rail-link:hover,
.page-about .rail-link:focus-visible {
  color: var(--text-1);
}
.page-about .rail-link[aria-current="true"] {
  color: var(--gold-soft);
}
.page-about .rail-link[aria-current="true"]::before {
  width: 24px;
  opacity: 1;
  background: var(--gold-soft);
}

.page-about .chapter {
  position: relative;
  padding-top: clamp(2.25rem, 5vw, 4rem);
  scroll-margin-top: calc(var(--header-h) + 1.75rem);
}
.page-about .chapter:first-child {
  padding-top: 0;
}
.page-about .chapter-title {
  position: relative;
  margin: 0 0 1.35rem;
  padding-bottom: 0.9rem;
  font-family: var(--font-heading);
  font-size: clamp(1.45rem, 2.7vw, 2rem);
  font-weight: 600;
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--text-1);
}
.page-about .chapter-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 60px;
  height: 1px;
  background: linear-gradient(90deg, var(--gold), rgba(201, 162, 74, 0));
}
.page-about .chapter-title::before {
  content: "";
  position: absolute;
  right: 0;
  top: -0.4rem;
  width: min(190px, 40%);
  height: 42px;
  background-image: var(--pattern-contour);
  opacity: 0.9;
  pointer-events: none;
}

.page-about .story-text {
  max-width: 36em;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text-2);
}
.page-about .story-text + .story-text {
  margin-top: 1.4rem;
}
.page-about .story-text p {
  margin: 0 0 1.1rem;
}
.page-about .story-text p:last-child {
  margin-bottom: 0;
}

/* ---------- 时间轴 ---------- */
.page-about .journey {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0 0 0 1.55rem;
  position: relative;
  max-width: 40em;
}
.page-about .journey::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 0.65rem;
  bottom: 0.65rem;
  width: 1px;
  background: linear-gradient(180deg, var(--gold) 0%, rgba(201, 162, 74, 0.12) 100%);
}
.page-about .journey-item {
  position: relative;
}
.page-about .journey-item::before {
  content: "";
  position: absolute;
  left: -1.55rem;
  top: 0.85rem;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 1px solid var(--gold);
  background: var(--ink-deep);
  transition: background 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.page-about .journey-item:hover::before {
  background: var(--gold-soft);
  box-shadow: 0 0 0 4px rgba(242, 204, 119, 0.14);
}
.page-about .journey-node {
  border-bottom: 1px solid var(--hair);
}
.page-about .journey-node > summary {
  list-style: none;
  cursor: pointer;
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.2rem;
  padding: 0.75rem 2rem 0.75rem 0;
  transition: color 0.18s var(--ease);
}
.page-about .journey-node > summary::-webkit-details-marker {
  display: none;
}
.page-about .journey-node > summary::after {
  content: "+";
  position: absolute;
  right: 0.35rem;
  top: 0.68rem;
  font-family: var(--font-accent);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}
.page-about .journey-node[open] > summary::after {
  content: "\2013";
}
.page-about .journey-node > summary:focus-visible {
  outline: 2px solid var(--gold-soft);
  outline-offset: 3px;
}
.page-about .journey-year {
  font-family: var(--font-accent);
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  font-variant-numeric: tabular-nums;
  color: var(--gold);
}
.page-about .journey-title {
  font-family: var(--font-accent);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-1);
}
.page-about .journey-text {
  margin: 0;
  padding: 0 1.5rem 1.05rem 0;
  font-size: 0.92rem;
  line-height: 1.82;
  color: var(--text-2);
  animation: about-fade 0.24s var(--ease);
}
@keyframes about-fade {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 团队与数据 ---------- */
.page-about .team-split {
  display: grid;
  gap: clamp(1.75rem, 4vw, 2.75rem);
  align-items: start;
}
.page-about .about-team-figure {
  border: 1px solid var(--hair);
  background: var(--ink);
}
.page-about .about-team-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-about .about-team-figure .media-caption {
  padding: 0.7rem 0.9rem;
  font-size: 0.76rem;
  line-height: 1.6;
  color: var(--text-3);
  border-top: 1px solid var(--hair);
}

.page-about .metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(1.75rem, 4vw, 2.75rem);
  background: var(--hair);
  border: 1px solid var(--hair);
}
.page-about .metric {
  position: relative;
  padding: clamp(1.05rem, 2.4vw, 1.55rem);
  background: var(--ink);
  transition: background 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.page-about .metric:hover,
.page-about .metric:focus-visible {
  background: var(--ink-deep);
  box-shadow: var(--glow-ring);
  outline: none;
}
.page-about .metric-value {
  display: block;
  font-family: var(--font-accent);
  font-size: clamp(1.6rem, 3.4vw, 2.3rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--text-1);
}
.page-about .metric-unit {
  margin-left: 0.15em;
  font-size: 0.5em;
  font-weight: 700;
  color: var(--gold);
}
.page-about .metric-label {
  display: block;
  margin-top: 0.45rem;
  font-size: 0.8rem;
  color: var(--mist);
}
.page-about .metric-note {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.72rem;
  line-height: 1.5;
  color: var(--peacock-soft);
  opacity: 0;
  transform: translateY(-4px);
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease);
}
.page-about .metric:hover .metric-note,
.page-about .metric:focus-visible .metric-note {
  opacity: 1;
  transform: none;
}

/* ---------- 分类矩阵 ---------- */
.page-about .taxonomy {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 1.75rem 0 1.5rem;
  background: var(--hair);
  border: 1px solid var(--hair);
}
.page-about .taxon {
  position: relative;
  padding: clamp(1.15rem, 2.6vw, 1.6rem);
  background: var(--ink);
  transition: background 0.2s var(--ease);
}
.page-about .taxon:hover {
  background: var(--ink-deep);
}
.page-about .taxon::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 1px;
  height: 100%;
  background: linear-gradient(180deg, rgba(201, 162, 74, 0.7), rgba(201, 162, 74, 0));
  opacity: 0;
  transition: opacity 0.22s var(--ease);
}
.page-about .taxon:hover::before {
  opacity: 1;
}
.page-about .taxon-index {
  margin: 0 0 0.55rem;
  font-family: var(--font-accent);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.22em;
  font-variant-numeric: tabular-nums;
  color: var(--gold);
}
.page-about .taxon-name {
  margin: 0 0 0.5rem;
  font-family: var(--font-heading);
  font-size: 1.08rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-1);
}
.page-about .taxon-desc {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.78;
  color: var(--text-2);
}

/* ---------- 地域纸面块 ---------- */
.page-about .terrain-block {
  position: relative;
  margin-top: 1.5rem;
  padding: clamp(1.5rem, 4vw, 2.85rem);
  background: var(--paper);
  border-left: 3px solid var(--peacock);
  overflow: hidden;
}
.page-about .terrain-block::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(92deg, rgba(18, 160, 138, 0.11) 0 1px, transparent 1px 46px),
    repeating-linear-gradient(2deg, rgba(224, 118, 58, 0.1) 0 1px, transparent 1px 32px);
  pointer-events: none;
}
.page-about .terrain-copy {
  position: relative;
  z-index: 1;
  max-width: 36em;
  font-size: 0.98rem;
  line-height: 1.88;
  color: var(--text-ink-2);
}
.page-about .terrain-copy p {
  margin: 0 0 1.05rem;
}
.page-about .terrain-copy p:last-child {
  margin-bottom: 0;
}
.page-about .terrain-copy p:first-child::first-letter {
  font-family: var(--font-heading);
  font-size: 2.6em;
  font-weight: 700;
  line-height: 0.9;
  float: left;
  margin: 0.12em 0.14em 0 0;
  color: var(--gold-deep);
}

/* ---------- 里程碑 ---------- */
.page-about .milestone-split {
  display: grid;
  gap: clamp(1.75rem, 4vw, 2.75rem);
  align-items: start;
}
.page-about .about-seal {
  border: 1px solid var(--hair);
  background: var(--ink);
}
.page-about .about-seal img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.page-about .about-seal .media-caption {
  padding: 0.7rem 0.9rem;
  font-size: 0.76rem;
  line-height: 1.6;
  color: var(--text-3);
  border-top: 1px solid var(--hair);
}

/* ---------- 未来方向 ---------- */
.page-about .ahead-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
}
.page-about .ahead-item {
  padding: clamp(1.15rem, 2.6vw, 1.6rem);
  background: var(--terrace);
}
.page-about .ahead-name {
  margin: 0 0 0.55rem;
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.42;
  color: var(--text-1);
}
.page-about .ahead-desc {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--text-2);
}

/* ---------- 收尾引导 ---------- */
.page-about .about-next {
  margin-top: clamp(3rem, 7vw, 5.5rem);
  padding: clamp(2.25rem, 6vw, 4rem) 0;
  border-top: 1px solid var(--hair);
  background-image: var(--pattern-scale);
}
.page-about .next-inner {
  max-width: 46rem;
}
.page-about .next-title {
  margin: 0.5rem 0 1rem;
  font-family: var(--font-heading);
  font-size: clamp(1.4rem, 2.8vw, 2.05rem);
  font-weight: 600;
  line-height: 1.34;
  color: var(--text-1);
}
.page-about .next-text {
  margin: 0 0 1.75rem;
  max-width: 34em;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text-2);
}
.page-about .next-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .taxonomy {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .ahead-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .journey-node > summary {
    grid-template-columns: 5rem minmax(0, 1fr);
    align-items: baseline;
    padding-right: 2.25rem;
  }
  .page-about .journey-text {
    padding-left: 5rem;
    padding-right: 2.25rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
  }
  .page-about .team-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.85fr);
  }
  .page-about .milestone-split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }
  .page-about .metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .page-about .story-body {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(2.5rem, 5vw, 5rem);
  }
  .page-about .chapter-rail {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 2.5rem);
    align-self: start;
    border-left: 1px solid var(--hair);
    padding-left: 1.15rem;
  }
}

@media (min-width: 1160px) {
  .page-about .taxonomy {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .journey-text {
    animation: none;
  }
  .page-about .metric,
  .page-about .taxon,
  .page-about .metric-note,
  .page-about .rail-link::before,
  .page-about .journey-item::before {
    transition: none;
  }
  .page-about .metric-note {
    opacity: 1;
    transform: none;
  }
}
</final>
</result>