.page-about {
  --about-line: rgba(140, 153, 196, 0.22);
  --about-line-strong: rgba(140, 153, 196, 0.38);
  --about-cream-line: rgba(92, 69, 52, 0.32);
  --about-notch: 20px;
  display: block;
  background: var(--indigo-900);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.72;
}

.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

.page-about .breadcrumbs {
  position: relative;
  z-index: 2;
  margin-bottom: clamp(20px, 4vw, 40px);
}

.page-about .breadcrumb-link,
.page-about .breadcrumb-current {
  color: var(--mist);
  font-size: 13px;
}

.page-about .breadcrumb-link:hover {
  color: var(--mint);
}

.page-about .about-kicker {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mint);
}

.page-about .about-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 4.4vw, 2.35rem);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--cream);
}

.page-about .about-lede {
  margin: 0;
  color: var(--text-dim);
  font-size: 16px;
  max-width: 62ch;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 4vw, 36px) 0 clamp(40px, 7vw, 84px);
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(55, 243, 193, 0.16), transparent 60%),
    radial-gradient(90% 70% at 0% 110%, rgba(255, 122, 26, 0.12), transparent 65%),
    linear-gradient(165deg, var(--indigo-850) 0%, var(--indigo-900) 58%, #070b1c 100%);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -46%;
  width: 70%;
  height: 120%;
  background: linear-gradient(200deg, rgba(24, 35, 78, 0.85), rgba(11, 18, 48, 0));
  transform: rotate(-9deg);
  pointer-events: none;
}

.page-about .hero-split {
  position: relative;
  z-index: 2;
  display: grid;
  gap: clamp(28px, 5vw, 48px);
}

.page-about .hero-copy h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 7.4vw, 3.9rem);
  line-height: 1.06;
  letter-spacing: -0.025em;
  color: var(--cream);
}

.page-about .hero-lede {
  margin: 0 0 clamp(22px, 4vw, 32px);
  max-width: 56ch;
  color: var(--text-dim);
  font-size: 16px;
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .hero-stat {
  padding: 14px 16px;
  background: rgba(24, 35, 78, 0.62);
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--mint);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.page-about .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 4vw, 1.75rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.page-about .stat-label {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  color: var(--mist);
}

/* 折线时间轴 */
.page-about .fold-rail {
  position: relative;
  display: grid;
  gap: 14px;
  padding-left: 24px;
  align-content: start;
}

.page-about .fold-rail::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--mint) 0%, rgba(55, 243, 193, 0.18) 72%, transparent 100%);
}

.page-about .fold-node {
  position: relative;
  padding: 14px 18px;
  background: rgba(24, 35, 78, 0.74);
  border: 1px solid var(--about-line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-about .fold-node::before {
  content: "";
  position: absolute;
  left: -18px;
  top: 20px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--indigo-900);
  border: 2px solid var(--mint);
}

.page-about .fold-node::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 46px;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(55, 243, 193, 0.6));
}

.page-about .fold-year {
  display: block;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--mint);
  letter-spacing: 0.04em;
  line-height: 1.2;
}

.page-about .fold-text {
  margin: 6px 0 0;
  font-size: 14px;
  color: var(--text-dim);
}

/* ---------- 通用区块 ---------- */
.page-about .about-section {
  padding: clamp(44px, 8vw, 88px) 0;
  border-top: 1px solid rgba(140, 153, 196, 0.14);
}

.page-about .about-head {
  margin-bottom: clamp(26px, 4vw, 40px);
}

/* ---------- 起点 ---------- */
.page-about .story-grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

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

.page-about .story-media img {
  width: 100%;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.page-about .story-body p {
  margin: 0 0 14px;
  color: var(--text-dim);
}

.page-about .story-quote {
  margin: 20px 0 22px;
  padding: 14px 0 14px 18px;
  border-left: 3px solid var(--orange);
  font-family: var(--font-serif);
  font-size: clamp(1.05rem, 3vw, 1.3rem);
  line-height: 1.55;
  color: var(--cream);
}

.page-about .media-caption {
  padding: 10px 2px 0;
  font-size: 12.5px;
  color: var(--mist);
}

/* ---------- 四类内容 ---------- */
.page-about .lanes {
  margin: 0;
  padding: 0;
  list-style: none;
  border-bottom: 1px solid var(--about-line);
}

.page-about .lane {
  display: grid;
  gap: 8px;
  padding: 22px 0;
  border-top: 1px solid var(--about-line);
}

.page-about .lane-num {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--orange);
  letter-spacing: 0.1em;
}

.page-about .lane-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.15rem, 3.4vw, 1.45rem);
  color: var(--cream);
}

.page-about .lane-body p {
  margin: 0 0 12px;
  color: var(--text-dim);
  font-size: 15.5px;
}

.page-about .lane-tag {
  display: inline-block;
  font-size: 12px;
}

.page-about .lanes-note {
  margin: 22px 0 0;
  padding: 16px 18px;
  background: rgba(24, 35, 78, 0.6);
  border-left: 3px solid var(--mint);
  color: var(--text-dim);
  font-size: 15px;
}

/* ---------- 方法 ---------- */
.page-about .about-workflow {
  background: linear-gradient(180deg, rgba(15, 23, 56, 0.9), rgba(11, 18, 48, 0.6));
}

.page-about .workflow-grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .steps {
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .step {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-top: 1px solid var(--about-line);
}

.page-about .step-num {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--mint);
  padding-top: 3px;
  letter-spacing: 0.06em;
}

.page-about .step-title {
  margin: 0 0 6px;
  font-size: 16.5px;
  font-weight: 700;
  color: var(--cream);
}

.page-about .step p {
  margin: 0;
  font-size: 15px;
  color: var(--text-dim);
}

.page-about .workflow-media {
  margin: 0;
  align-self: start;
  border: 1px solid var(--about-line-strong);
}

.page-about .workflow-media img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 贵州 ---------- */
.page-about .about-local {
  padding-bottom: clamp(44px, 8vw, 88px);
}

.page-about .local-panel {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 4.5vw, 48px);
  background: var(--cream);
  color: var(--ink);
  border: 1px solid var(--brown);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-panel);
}

.page-about .local-contour {
  position: absolute;
  inset: auto -8% -18% auto;
  width: min(560px, 78%);
  height: auto;
  color: var(--brown);
  opacity: 0.24;
  pointer-events: none;
}

.page-about .local-head {
  position: relative;
  z-index: 1;
}

.page-about .local-head .about-kicker {
  color: #a1400f;
}

.page-about .local-head .about-title {
  color: var(--ink);
}

.page-about .local-head .about-lede {
  color: #4a3a2c;
}

.page-about .local-filters {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(18px, 3vw, 26px);
}

.page-about .local-filters .filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 13px;
  font-family: var(--font-body);
  font-size: 13.5px;
  color: #3d2f22;
  background: rgba(255, 255, 255, 0.4);
  border: 1px solid var(--about-cream-line);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.page-about .local-filters .filter-chip:hover {
  border-color: var(--brown);
}

.page-about .local-filters .filter-chip[aria-pressed="true"] {
  background: var(--indigo-900);
  border-color: var(--indigo-900);
  color: var(--paper);
}

.page-about .local-filters .filter-count {
  font-family: var(--font-mono);
  font-size: 11.5px;
  opacity: 0.72;
}

.page-about .local-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .local-item {
  padding: 16px 18px;
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid var(--about-cream-line);
  border-left: 4px solid var(--brown);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  transition: border-left-color 0.2s ease, background 0.2s ease;
}

.page-about .local-item:hover {
  border-left-color: #b8410f;
  background: rgba(255, 255, 255, 0.82);
}

.page-about .local-item.is-hidden {
  display: none;
}

.page-about .local-item-tag {
  display: inline-block;
  margin-bottom: 6px;
  padding: 2px 9px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--cream);
  background: var(--brown);
  border-radius: var(--radius-pill);
}

.page-about .local-item-title {
  margin: 0 0 6px;
  font-size: 16.5px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .local-item-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.65;
  color: #463628;
}

/* ---------- 协作 ---------- */
.page-about .eco-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0 0 clamp(24px, 4vw, 36px);
  padding: 0;
  list-style: none;
}

.page-about .eco-stat {
  padding: 16px;
  background: rgba(24, 35, 78, 0.72);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-md);
}

.page-about .eco-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 5vw, 2rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--mint);
  font-variant-numeric: tabular-nums;
}

.page-about .eco-label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.5;
}

.page-about .eco-list {
  border-bottom: 1px solid var(--about-line);
}

.page-about .eco-item {
  border-top: 1px solid var(--about-line);
}

.page-about .eco-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
}

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

.page-about .eco-sum-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(15px, 3.2vw, 17px);
  color: var(--cream);
}

.page-about .eco-mark {
  position: relative;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  border: 1px solid var(--mint);
  border-radius: 50%;
}

.page-about .eco-mark::before,
.page-about .eco-mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--mint);
  transform: translate(-50%, -50%);
}

.page-about .eco-mark::before {
  width: 8px;
  height: 1.5px;
}

.page-about .eco-mark::after {
  width: 1.5px;
  height: 8px;
  transition: opacity 0.2s ease;
}

.page-about .eco-item[open] .eco-mark::after {
  opacity: 0;
}

.page-about .eco-item[open] .eco-sum-title {
  color: var(--mint);
}

.page-about .eco-body {
  padding: 0 0 20px;
}

.page-about .eco-body p {
  margin: 0;
  max-width: 66ch;
  font-size: 15px;
  color: var(--text-dim);
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .team-note {
  margin: 16px 0 0;
  padding: 14px 16px;
  font-size: 14.5px;
  color: var(--text-dim);
  background: rgba(24, 35, 78, 0.6);
  border-left: 3px solid var(--orange);
}

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

.page-about .team-row {
  position: relative;
  padding: 18px 18px 18px 22px;
  background: var(--indigo-800);
  border: 1px solid var(--about-line);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  transition: background 0.25s ease, transform 0.25s ease, border-color 0.25s ease;
}

.page-about .team-row::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--mist);
  transition: background 0.25s ease, width 0.25s ease;
}

.page-about .team-row:nth-child(1)::before { width: 4px; }
.page-about .team-row:nth-child(2)::before { width: 8px; }
.page-about .team-row:nth-child(3)::before { width: 12px; }
.page-about .team-row:nth-child(4)::before { width: 16px; }

.page-about .team-row:hover {
  background: var(--indigo-700);
  border-color: var(--about-line-strong);
}

.page-about .team-row:hover::before {
  background: var(--mint);
}

.page-about .team-name {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--cream);
}

.page-about .team-desc {
  margin: 0 0 10px;
  font-size: 14.5px;
  color: var(--text-dim);
}

.page-about .team-flow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--mist);
  transition: color 0.25s ease;
}

.page-about .team-row:hover .team-flow {
  color: var(--mint);
}

/* ---------- 行动区 ---------- */
.page-about .about-cta {
  padding: clamp(36px, 6vw, 64px) 0 clamp(48px, 8vw, 84px);
}

.page-about .cta-inner {
  display: grid;
  gap: 22px;
  padding: clamp(22px, 4vw, 40px);
  background:
    linear-gradient(120deg, rgba(255, 122, 26, 0.14), rgba(55, 243, 193, 0.08) 60%, transparent),
    var(--indigo-800);
  border: 1px solid var(--about-line-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-panel);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-about .cta-title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.3rem, 4vw, 1.85rem);
  line-height: 1.25;
  color: var(--cream);
}

.page-about .cta-text {
  margin: 0;
  font-size: 15px;
  color: var(--text-dim);
  max-width: 52ch;
}

.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about {
    font-size: 17px;
  }

  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .eco-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .team-list {
    gap: 14px;
  }

  .page-about .cta-inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-about .cta-actions {
    justify-content: flex-end;
  }
}

@media (min-width: 960px) {
  .page-about .hero-split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-about .fold-rail {
    margin-top: 12px;
  }

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

  .page-about .lane {
    grid-template-columns: 78px minmax(0, 0.72fr) minmax(0, 1.28fr);
    gap: 26px;
    align-items: start;
    padding: 26px 0;
  }

  .page-about .lane-title {
    margin-top: 2px;
  }

  .page-about .workflow-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-about .workflow-media {
    position: sticky;
    top: 96px;
  }

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

  .page-about .team-grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    align-items: start;
  }

  .page-about .team-intro {
    position: sticky;
    top: 96px;
  }

  .page-about .team-row:nth-child(2) {
    margin-right: 24px;
  }

  .page-about .team-row:nth-child(3) {
    margin-right: 48px;
  }

  .page-about .team-row:nth-child(4) {
    margin-right: 72px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-row,
  .page-about .team-row::before,
  .page-about .team-flow,
  .page-about .local-item,
  .page-about .local-filters .filter-chip,
  .page-about .eco-mark::after {
    transition: none;
  }
}
<<<END>>>