.page-about {
  background: var(--dusk);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: clip;
  padding-bottom: clamp(48px, 7vw, 88px);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: 0.06em;
  line-height: 1.14;
  margin: 0;
  color: var(--paper-bright);
}

.page-about .mono {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
}

.page-about .eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--lake);
  margin: 0 0 12px;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  display: grid;
  gap: 34px;
  padding-top: clamp(22px, 4vw, 44px);
  padding-bottom: clamp(40px, 6vw, 72px);
  border-bottom: 1px solid var(--line);
  margin-top: clamp(12px, 2vw, 20px);
}

.page-about .about-hero h1 {
  font-size: clamp(2rem, 5.6vw, 3.5rem);
  margin-bottom: 18px;
}

.page-about .about-hero .lede {
  font-family: var(--font-body);
  font-size: clamp(1rem, 1.5vw, 1.1rem);
  line-height: 1.9;
  color: var(--wash);
  max-width: 36em;
  margin: 0;
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  padding-bottom: 14px;
}

.page-about .fig-cell {
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: var(--radius);
  padding: 16px 14px;
  display: grid;
  gap: 6px;
  align-content: start;
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-about .fig-cell:nth-child(even) {
  transform: translateY(14px);
}

.page-about .fig-cell:hover {
  border-color: var(--line-strong);
}

.page-about .fig-num {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  letter-spacing: 0.02em;
  line-height: 1;
  color: var(--barley);
}

.page-about .fig-cell:nth-child(2) .fig-num {
  color: var(--lake);
}

.page-about .fig-cell:nth-child(3) .fig-num {
  color: var(--paper-bright);
}

.page-about .fig-label {
  font-family: var(--font-body);
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--slate-blue);
}

/* ---------- 正文骨架 ---------- */

.page-about .about-body {
  display: grid;
  gap: 30px;
  padding-top: clamp(32px, 5vw, 60px);
}

.page-about .about-index > .mono {
  color: var(--slate-blue);
  margin: 0 0 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-strong);
}

.page-about .about-index ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 8px;
}

.page-about .about-index a {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 6px;
  align-items: baseline;
  padding: 8px 6px 8px 9px;
  border-left: 2px solid transparent;
  color: var(--wash);
  text-decoration: none;
  font-size: 0.88rem;
  line-height: 1.5;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-about .about-index a span {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--slate-blue);
  letter-spacing: 0.04em;
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  color: var(--paper-bright);
  border-left-color: var(--barley);
  background: rgba(232, 184, 75, 0.07);
  outline: none;
}

.page-about .about-main {
  min-width: 0;
}

.page-about .about-section {
  padding: clamp(32px, 5vw, 56px) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-main > .about-section:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-section h2 {
  font-size: clamp(1.4rem, 3.1vw, 2rem);
}

.page-about .about-section--slab {
  background: var(--panel);
  border-radius: var(--radius);
  padding-left: clamp(16px, 3vw, 34px);
  padding-right: clamp(16px, 3vw, 34px);
}

.page-about .about-intro {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: clamp(0.95rem, 1.3vw, 1.02rem);
  line-height: 1.9;
  color: var(--wash);
}

.page-about .about-footnote {
  margin: 20px 0 0;
  color: var(--slate-blue);
  line-height: 1.85;
  max-width: 64ch;
}

/* ---------- 双栏与旁注 ---------- */

.page-about .about-cols {
  display: grid;
  gap: 20px;
  margin-top: 20px;
}

.page-about .prose p {
  margin: 0 0 1.1em;
  font-size: clamp(0.95rem, 1.3vw, 1.03rem);
  line-height: 1.9;
  color: var(--wash);
}

.page-about .prose p:last-child {
  margin-bottom: 0;
}

.page-about .about-note {
  border-left: 2px solid var(--lake);
  padding: 2px 0 2px 14px;
  margin-top: 22px;
}

.page-about .about-note .note-title {
  color: var(--lake);
  margin: 0 0 8px;
}

.page-about .about-note p:not(.note-title) {
  margin: 0;
  font-size: 0.84rem;
  line-height: 1.85;
  color: var(--slate-blue);
}

/* ---------- 图片 ---------- */

.page-about figure {
  margin: 0;
}

.page-about .about-section figure {
  margin-top: 24px;
}

.page-about .figure-media {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

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

.page-about figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  line-height: 1.7;
  color: var(--slate-blue);
}

/* ---------- 团队计数条 ---------- */

.page-about .team-bars {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .team-bar {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) auto;
  gap: 4px 10px;
  align-items: baseline;
  padding: 14px 14px;
  background: rgba(23, 26, 32, 0.55);
  border: 1px solid var(--line);
  border-left: 2px solid var(--line-strong);
  border-radius: var(--radius);
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-about .team-bar:hover {
  background: var(--dusk);
  border-left-color: var(--barley);
}

.page-about .bar-idx {
  color: var(--slate-blue);
  font-size: 0.7rem;
}

.page-about .bar-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.05em;
  color: var(--paper-bright);
}

.page-about .bar-count {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--barley);
  white-space: nowrap;
}

.page-about .bar-duty {
  grid-column: 1 / -1;
  font-size: 0.84rem;
  line-height: 1.8;
  color: var(--slate-blue);
  transition: color 0.18s var(--ease);
}

.page-about .team-bar:hover .bar-duty {
  color: var(--wash);
}

/* ---------- 时间线 ---------- */

.page-about .tags-layout {
  display: grid;
  gap: 26px;
  margin-top: 24px;
}

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

.page-about .tl-item {
  position: relative;
  padding: 0 0 26px 24px;
  border-left: 1px solid var(--line-strong);
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--dusk);
  border: 1px solid var(--lake);
}

.page-about .tl-item:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.page-about .tl-item:last-child::before {
  background: var(--barley);
  border-color: var(--barley);
}

.page-about .tl-era {
  color: var(--lake);
  margin: 0 0 6px;
}

.page-about .tl-item h3 {
  font-size: clamp(1.02rem, 1.8vw, 1.16rem);
  margin-bottom: 8px;
}

.page-about .tl-item p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--wash);
}

.page-about .tl-more {
  margin-top: 10px;
}

.page-about .tl-more summary {
  list-style: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 3px 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--lake);
  border-bottom: 1px dashed rgba(79, 163, 199, 0.45);
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

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

.page-about .tl-more summary::before {
  content: "+";
  font-size: 0.92rem;
  line-height: 1;
}

.page-about .tl-more[open] summary::before {
  content: "−";
}

.page-about .tl-more summary:hover,
.page-about .tl-more summary:focus-visible {
  color: var(--paper-bright);
  border-bottom-color: var(--paper-bright);
  outline: none;
}

.page-about .tl-more p {
  margin: 10px 0 0;
  font-size: 0.86rem;
  color: var(--slate-blue);
}

.page-about .tag-tally {
  margin-top: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.page-about .tag-tally > .mono {
  color: var(--slate-blue);
  margin: 0;
}

.page-about .tag-tally ul {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .tag-tally .tag b {
  font-family: var(--font-mono);
  font-weight: 600;
  margin-left: 5px;
  letter-spacing: 0.02em;
}

/* ---------- 索引路径 ---------- */

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

.page-about .pathway li {
  display: grid;
  gap: 6px;
  padding: 14px 16px;
  border: 1px solid rgba(79, 163, 199, 0.45);
  background: rgba(79, 163, 199, 0.08);
  border-radius: var(--radius);
}

.page-about .pw-num {
  color: var(--lake);
  font-size: 0.68rem;
}

.page-about .pw-text {
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--paper-bright);
}

.page-about .entry-grid {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .entry-grid li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 14px 16px;
  background: var(--dusk);
  font-size: 0.92rem;
  color: var(--wash);
  transition: background 0.18s var(--ease), color 0.18s var(--ease);
}

.page-about .entry-grid li:hover {
  background: var(--panel);
  color: var(--paper-bright);
}

.page-about .entry-grid .mono {
  color: var(--lake);
  font-size: 0.68rem;
}

/* ---------- 暖纸章节 ---------- */

.page-about .about-paper {
  background: var(--paper);
  color: var(--ink);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  padding: clamp(22px, 4vw, 44px);
  box-shadow: var(--shadow-soft);
}

.page-about .about-paper h2 {
  color: var(--ink);
}

.page-about .about-paper .eyebrow {
  color: rgba(14, 16, 20, 0.58);
}

.page-about .about-paper .about-note {
  border-left-color: var(--ochre);
  margin-top: 24px;
}

.page-about .about-paper .about-note .note-title {
  color: var(--ochre);
}

.page-about .about-paper .about-note p:not(.note-title) {
  color: rgba(14, 16, 20, 0.74);
}

.page-about .cadence-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
}

.page-about .cadence-list li {
  display: grid;
  gap: 4px;
  padding: 15px 0;
  border-top: 1px solid rgba(14, 16, 20, 0.16);
}

.page-about .cadence-list li:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .cad-time {
  color: rgba(14, 16, 20, 0.62);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}

.page-about .cadence-list p {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.85;
  color: rgba(14, 16, 20, 0.88);
}

/* ---------- 联络 ---------- */

.page-about .reach-list {
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .reach-list > div {
  background: var(--dusk);
  padding: 14px 16px;
}

.page-about .reach-list dt {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--slate-blue);
}

.page-about .reach-list dd {
  margin: 7px 0 0;
  font-size: 0.96rem;
  line-height: 1.6;
  color: var(--paper-bright);
  word-break: break-word;
}

/* ---------- 响应式 ---------- */

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

@media (min-width: 760px) {
  .page-about .team-bar {
    grid-template-columns: 40px 132px 76px minmax(0, 1fr);
    gap: 4px 16px;
    padding: 15px 18px;
  }

  .page-about .bar-duty {
    grid-column: auto;
  }

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

  .page-about .cadence-list li {
    grid-template-columns: 148px minmax(0, 1fr);
    gap: 6px 22px;
    align-items: start;
  }

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

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }

  .page-about .about-cols {
    grid-template-columns: minmax(0, 1fr) 236px;
    gap: clamp(24px, 3.5vw, 46px);
    align-items: start;
  }

  .page-about .about-note {
    margin-top: 0;
  }

  .page-about .tags-layout {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.8fr);
    gap: clamp(24px, 4vw, 48px);
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: 214px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 92px;
    align-self: start;
    border-right: 1px solid var(--line);
    padding-right: 14px;
  }

  .page-about .about-index ol {
    grid-template-columns: 1fr;
    gap: 0;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .fig-cell,
  .page-about .team-bar,
  .page-about .bar-duty,
  .page-about .about-index a,
  .page-about .tl-more summary,
  .page-about .entry-grid li {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>