.page-about {
  position: relative;
  overflow-x: clip;
  background: var(--ink);
  color: var(--mist);
}

.page-about::before {
  content: "";
  position: absolute;
  inset: -12% -24% auto -24%;
  height: 780px;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(46% 40% at 20% 16%, rgba(56, 224, 208, .18), transparent 70%),
    radial-gradient(44% 38% at 80% 6%, rgba(139, 92, 246, .22), transparent 72%);
  animation: about-breathe 22s ease-in-out infinite;
}

@keyframes about-breathe {
  0%, 100% { opacity: .72; }
  50% { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  .page-about::before { animation: none; }
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  z-index: 1;
  padding: clamp(26px, 5vw, 54px) 0 clamp(34px, 6vw, 70px);
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(20px, 3vw, 34px);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--slate);
}

.page-about .breadcrumb a {
  color: var(--slate);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-about .breadcrumb a:hover {
  color: var(--cyan);
  border-color: var(--line-cyan);
}

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

.page-about .about-hero-main h1 {
  max-width: 20ch;
  margin: 14px 0 0;
}

.page-about .about-hero-main .lede {
  max-width: 62ch;
  margin-top: 18px;
  color: var(--mist);
  opacity: .92;
}

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

.page-about .about-hero-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--glass);
  backdrop-filter: blur(10px);
}

.page-about .fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .fact-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .fact:nth-child(2) .fact-num { color: var(--violet); }
.page-about .fact:nth-child(3) .fact-num { color: var(--gold); }
.page-about .fact:nth-child(4) .fact-num { color: var(--mint); }

.page-about .fact-label {
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: .1em;
  color: var(--slate);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 52px);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-about .about-rail {
  position: relative;
  min-width: 0;
}

.page-about .rail-title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--slate);
}

.page-about .about-rail .toc {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-rail .toc::-webkit-scrollbar { display: none; }

.page-about .toc-link {
  display: block;
  padding: 8px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  color: var(--slate);
  text-decoration: none;
  white-space: nowrap;
  transition: color .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}

.page-about .toc-link:hover {
  color: var(--mist);
  border-color: var(--line-cyan);
}

.page-about .toc-link[data-active="true"] {
  color: var(--cyan);
  border-color: var(--line-cyan);
  background: rgba(56, 224, 208, .1);
}

.page-about .about-flow {
  display: flex;
  flex-direction: column;
  gap: clamp(46px, 7vw, 92px);
  min-width: 0;
}

.page-about .about-section { position: relative; }
.page-about [data-section] { scroll-margin-top: 116px; }

.page-about .section-head { margin-bottom: clamp(18px, 3vw, 30px); }
.page-about .section-head .eyebrow { color: var(--cyan); }
.page-about .section-title { max-width: 26ch; margin: 10px 0 0; }

.page-about .about-cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 36px);
}

.page-about .about-prose p + p { margin-top: 16px; }

.page-about .about-note {
  padding-left: 14px;
  border-left: 2px solid var(--line-cyan);
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate);
}

.page-about .about-note p + p { margin-top: 10px; }

.page-about .about-list {
  display: grid;
  gap: 12px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-list li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.7;
}

.page-about .about-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: linear-gradient(135deg, var(--cyan), var(--violet));
}

/* ---------- 图框 ---------- */
.page-about .about-figure { margin: 0 0 clamp(22px, 3vw, 32px); }
.page-about .about-figure--square { margin: 0; }
.page-about .timeline-figure { margin: 0 0 clamp(24px, 4vw, 40px); }

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

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: clamp(22px, 3vw, 30px);
}

.page-about .team-cell {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-2);
  transition: transform .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-about .team-cell:hover {
  transform: translateY(-2px);
  border-color: var(--line-cyan);
  background: var(--ink-3);
}

.page-about .team-cell:nth-child(2):hover { border-color: var(--line-violet); }
.page-about .team-cell:nth-child(3):hover { border-color: var(--line-violet); }
.page-about .team-cell:nth-child(4):hover { border-color: rgba(244, 184, 96, .5); }

.page-about .team-num {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 26px;
  line-height: 1;
  color: var(--gold);
}

.page-about .team-meta {
  margin: 10px 0 0;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--cyan);
}

.page-about .team-name {
  margin: 6px 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--mist);
}

.page-about .team-cell p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 三审流程 ---------- */
.page-about .process-steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .process-step {
  padding: 24px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(27, 46, 74, .62), rgba(14, 33, 56, .92));
}

.page-about .process-step:nth-child(2) { border-color: var(--line-violet); }
.page-about .process-step:nth-child(3) { border-color: rgba(244, 184, 96, .38); }

.page-about .step-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 40px;
  line-height: 1;
  color: var(--cyan);
  opacity: .55;
}

.page-about .process-step:nth-child(2) .step-num { color: var(--violet); }
.page-about .process-step:nth-child(3) .step-num { color: var(--gold); }

.page-about .step-name {
  margin: 12px 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--mist);
}

.page-about .process-step p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate);
}

.page-about .process-foot {
  display: block;
  margin-top: 20px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 分类体系 ---------- */
.page-about .cat-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
  align-items: start;
}

.page-about .cat-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .cat-item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(14, 33, 56, .72);
  transition: border-color .18s var(--ease), background .18s var(--ease);
}

.page-about .cat-item:nth-child(3n + 2) { border-color: rgba(139, 92, 246, .28); }
.page-about .cat-item:nth-child(3n) { border-color: rgba(56, 224, 208, .26); }

.page-about .cat-item:hover {
  background: var(--ink-3);
  border-color: var(--line-cyan);
}

.page-about .cat-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--mist);
}

.page-about .cat-count {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  color: var(--gold);
  white-space: nowrap;
}

.page-about .zone-note {
  margin: 16px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--slate);
}

/* ---------- 供稿标准 ---------- */
.page-about .criteria {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(22px, 3vw, 30px);
}

.page-about .criterion {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--glass);
  backdrop-filter: blur(8px);
}

.page-about .criterion h3 {
  margin: 12px 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--mist);
}

.page-about .criterion p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate);
}

/* ---------- 里程碑折叠 ---------- */
.page-about .milestone-accordion .accordion-item {
  margin-bottom: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(14, 33, 56, .74);
  overflow: hidden;
}

.page-about .milestone-accordion .accordion-item[data-open] { border-color: var(--line-cyan); }

.page-about [data-accordion-trigger] {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  padding: 18px 20px;
  border: 0;
  background: none;
  color: var(--mist);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.page-about .accordion-icon {
  flex: none;
  width: 11px;
  height: 11px;
  margin-left: auto;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform .2s var(--ease);
}

.page-about [data-accordion-item][data-open] .accordion-icon { transform: rotate(-135deg); }

.page-about [data-accordion-panel] { display: none; }

.page-about [data-accordion-item][data-open] [data-accordion-panel] { display: block; }

.page-about .accordion-panel-inner {
  padding: 0 20px 20px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--slate);
}

.page-about .accordion-panel-inner p { margin: 0; }

.page-about .ms-year {
  flex: none;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 20px;
  color: var(--gold);
}

.page-about .ms-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--mist);
}

/* ---------- 数据块 ---------- */
.page-about .stat-board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: clamp(22px, 3vw, 30px);
}

.page-about .stat-board .stat {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(150deg, rgba(139, 92, 246, .16), rgba(14, 33, 56, .92));
}

.page-about .stat-board .stat:nth-child(2n) {
  background: linear-gradient(150deg, rgba(56, 224, 208, .16), rgba(14, 33, 56, .92));
}

.page-about .stat-board .stat:nth-child(3n) {
  background: linear-gradient(150deg, rgba(122, 46, 74, .34), rgba(14, 33, 56, .92));
}

.page-about .stat-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(28px, 3.6vw, 42px);
  font-weight: 700;
  line-height: 1.05;
  color: var(--mist);
}

.page-about .stat-label {
  font-size: 13px;
  line-height: 1.65;
  color: var(--slate);
}

/* ---------- 年度观察 ---------- */
.page-about .observation-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: clamp(22px, 3vw, 30px);
}

.page-about .obs-card {
  padding: 22px;
  border: 1px solid var(--line);
  border-top: 2px solid var(--violet);
  border-radius: var(--radius);
  background: var(--ink-2);
}

.page-about .obs-card:nth-child(2n) { border-top-color: var(--cyan); }
.page-about .obs-card:nth-child(3n) { border-top-color: var(--gold); }

.page-about .obs-card h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--mist);
}

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

/* ---------- 结尾入口 ---------- */
.page-about .about-links {
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid var(--line-cyan);
  border-radius: var(--radius-lg);
  background: linear-gradient(140deg, rgba(56, 224, 208, .12), rgba(139, 92, 246, .16));
}

.page-about .about-links h2 {
  margin: 0 0 12px;
  font-size: clamp(22px, 2.8vw, 30px);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--mist);
}

.page-about .about-links .prose {
  max-width: 62ch;
  color: var(--mist);
  opacity: .88;
}

.page-about .link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .team-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-about .criteria { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .page-about .observation-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-about .cat-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(240px, 300px);
    align-items: end;
  }
  .page-about .about-cols {
    grid-template-columns: minmax(0, 1fr) minmax(200px, 240px);
  }
  .page-about .process-steps { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .page-about .cat-layout {
    grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
  }
  .page-about .stat-board { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 1040px) {
  .page-about .about-shell {
    grid-template-columns: 208px minmax(0, 1fr);
  }
  .page-about .about-rail {
    position: sticky;
    top: 96px;
    align-self: start;
  }
  .page-about .about-rail .toc {
    display: block;
    overflow: visible;
    padding: 0;
  }
  .page-about .about-rail .toc li + li { margin-top: 4px; }
  .page-about .toc-link {
    padding: 7px 0 7px 14px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    white-space: normal;
    line-height: 1.5;
  }
  .page-about .toc-link[data-active="true"] {
    background: none;
  }
}

@media (min-width: 1160px) {
  .page-about .team-grid {
    grid-template-columns: 1.25fr 1fr 1fr 1.1fr;
  }
}
<<<END>>>