.page-about {
  --ab-gap: clamp(20px, 3.2vw, 44px);
  --ab-block: clamp(44px, 6vw, 84px);
  --ab-indigo-soft: #A79EFF;
  --ab-wine-soft: #E08E9C;
  background: var(--bg);
  color: var(--text);
}

.page-about .crumbs {
  padding-top: clamp(18px, 3vw, 30px);
}

/* ---------- 按钮 ---------- */
.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border-radius: var(--radius-pill);
  border: 2px solid var(--line);
  background: var(--surface);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--fs-s);
  font-weight: 700;
  text-decoration: none;
  transition: transform .18s var(--ease), background .18s var(--ease), border-color .18s var(--ease), color .18s var(--ease);
}
.page-about .btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--ink);
}
.page-about .btn-primary:hover {
  background: var(--warm);
  border-color: var(--warm);
}
.page-about .btn-ghost:hover {
  background: var(--raise);
  border-color: var(--accent);
}
.page-about .btn:hover {
  transform: translateY(-2px);
}
.page-about .btn:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

/* ---------- 通用排版 ---------- */
.page-about .eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--accent);
}
.page-about .section-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.12;
  font-size: clamp(25px, 3.6vw, 44px);
}
.page-about .ab-lede {
  margin: 0;
  max-width: 64ch;
  font-size: var(--fs-s);
  line-height: 1.8;
  color: var(--muted);
}
.page-about .ab-p {
  margin: 0 0 16px;
  max-width: 66ch;
  font-size: var(--fs-s);
  line-height: 1.8;
  color: var(--text);
}
.page-about .ab-p:last-child {
  margin-bottom: 0;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--ab-gap);
  align-items: start;
  padding-block: clamp(26px, 4.5vw, 56px) clamp(30px, 5vw, 64px);
}
.page-about .ab-hero-title {
  margin: 0 0 clamp(16px, 2vw, 24px);
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.06;
  font-size: clamp(32px, 6.6vw, 68px);
}
.page-about .ab-hero-lede {
  margin: 0 0 clamp(22px, 3vw, 32px);
  max-width: 60ch;
  font-size: clamp(16px, 1.5vw, 20px);
  line-height: 1.75;
  color: var(--muted);
}
.page-about .ab-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about .ab-index-panel {
  border: var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 20px 18px 22px;
  box-shadow: var(--shadow-hard-lg);
}
.page-about .ab-index-title {
  margin: 0 0 12px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--accent);
}
.page-about .ab-index {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}
.page-about .ab-index-link {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 9px 10px 9px 12px;
  border-left: 3px solid transparent;
  border-radius: 0 10px 10px 0;
  color: var(--text);
  text-decoration: none;
  font-size: var(--fs-s);
  transition: background .18s var(--ease), border-color .18s var(--ease);
}
.page-about .ab-index-link:hover {
  background: var(--raise);
  border-left-color: var(--accent);
}
.page-about .ab-index-link:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}
.page-about .ab-index-num {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--accent-d);
}

/* ---------- 区块与栅格 ---------- */
.page-about .ab-block {
  padding-block: var(--ab-block);
}
.page-about .ab-block-head {
  max-width: 78ch;
  margin-bottom: clamp(22px, 3vw, 36px);
}
.page-about .ab-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--ab-gap);
  align-items: start;
}
.page-about .ab-col-main,
.page-about .ab-col-side {
  min-width: 0;
}

/* ---------- 图文容器 ---------- */
.page-about .media-frame {
  margin: 0;
  border: var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
  box-shadow: var(--shadow-hard-lg);
}
.page-about .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .media-frame figcaption {
  padding: 12px 16px 14px;
  border-top: 2px solid var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}
.page-about .ab-wide-media {
  margin-bottom: clamp(22px, 3vw, 36px);
}

/* ---------- 团队分工 ---------- */
.page-about .ab-crew {
  border-top: 2px solid var(--line);
}
.page-about .ab-crew-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "role num"
    "desc desc";
  gap: 6px 18px;
  padding: 18px 4px;
  border-bottom: 2px solid var(--line);
  transition: background .18s var(--ease);
}
.page-about .ab-crew-row:hover {
  background: var(--surface);
}
.page-about .ab-crew-role {
  grid-area: role;
  margin: 0;
  font-size: var(--fs-s);
  font-weight: 700;
}
.page-about .ab-crew-num {
  grid-area: num;
  margin: 0;
  font-family: var(--font-num);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  line-height: 1;
  color: var(--accent);
}
.page-about .ab-crew-desc {
  grid-area: desc;
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .ab-flow {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
}
.page-about .ab-flow-item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 9px 16px 9px 13px;
  border: 2px solid var(--line);
  border-radius: var(--radius-pill);
  background: var(--surface);
  font-size: 13.5px;
  color: var(--muted);
}
.page-about .ab-flow-item .num {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--accent);
}

/* ---------- 版本时间线 ---------- */
.page-about .ab-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}
.page-about .ab-tl-item {
  position: relative;
  z-index: 1;
  padding: 20px 20px 22px;
  border: var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-hard);
  transition: transform .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}
.page-about .ab-tl-item:hover,
.page-about .ab-tl-item:focus-within {
  transform: translateY(-2px);
  border-color: var(--accent);
  background: var(--raise);
}
.page-about .ab-tl-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}
.page-about .ab-tl-badge {
  font-family: var(--font-num);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .1em;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  border: 2px solid var(--accent-d);
  color: var(--accent-d);
  background: transparent;
}
.page-about .ab-tl-item:nth-child(2) .ab-tl-badge {
  border-color: var(--indigo);
  color: var(--ab-indigo-soft);
}
.page-about .ab-tl-item:nth-child(3) .ab-tl-badge {
  border-color: var(--warm);
  color: var(--warm);
}
.page-about .ab-tl-item:nth-child(4) .ab-tl-badge {
  border-color: var(--accent);
  color: var(--accent);
}
.page-about .ab-tl-year {
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--muted);
}
.page-about .ab-tl-title {
  margin: 0 0 10px;
  font-size: var(--fs-m);
  font-weight: 700;
  line-height: 1.4;
}
.page-about .ab-tl-desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 内容地图 ---------- */
.page-about .ab-map {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  border-top: 2px solid var(--line);
}
.page-about .ab-map-item {
  position: relative;
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0 20px 20px;
  border-bottom: 2px solid var(--line);
}
.page-about .ab-map-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 28px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
}
.page-about .ab-map-item:nth-child(1)::before { background: var(--accent); }
.page-about .ab-map-item:nth-child(2)::before { background: var(--warm); }
.page-about .ab-map-item:nth-child(3)::before { background: var(--indigo); }
.page-about .ab-map-item:nth-child(4)::before { background: var(--accent-d); }
.page-about .ab-map-item:nth-child(5)::before { background: var(--wine); }
.page-about .ab-map-num {
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--accent-d);
  padding-top: 3px;
}
.page-about .ab-map-title {
  margin: 0 0 8px;
  font-size: var(--fs-s);
  font-weight: 700;
  letter-spacing: .01em;
}
.page-about .ab-map-text {
  margin: 0 0 10px;
  max-width: 60ch;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
}
.page-about .ab-map-link {
  display: inline-block;
  padding-bottom: 2px;
  border-bottom: 2px solid var(--accent-d);
  font-size: 13.5px;
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.page-about .ab-map-link:hover {
  color: var(--warm);
  border-bottom-color: var(--warm);
}
.page-about .ab-map-link:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.page-about .ab-note-card {
  border: var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  padding: 20px;
  box-shadow: var(--shadow-hard);
}
.page-about .ab-note-title {
  margin: 0 0 10px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--accent);
}
.page-about .ab-note-text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 数据卡 ---------- */
.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: clamp(20px, 3vw, 30px);
}
.page-about .ab-stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 16px;
  border: var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-hard);
  transition: transform .18s var(--ease), border-color .18s var(--ease);
}
.page-about .ab-stat:hover {
  transform: translateY(-2px);
  border-color: var(--accent-d);
}
.page-about .ab-stat-value {
  font-family: var(--font-num);
  font-weight: 700;
  font-size: clamp(24px, 3.2vw, 34px);
  line-height: 1;
  color: var(--accent);
}
.page-about .ab-stat-value.is-warm {
  color: var(--warm);
}
.page-about .ab-stat-value.is-indigo {
  color: var(--ab-indigo-soft);
}
.page-about .ab-stat-label {
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 合作生态 ---------- */
.page-about .tag {
  display: inline-block;
  align-self: flex-start;
  padding: 4px 12px;
  border: 2px solid var(--line);
  border-radius: var(--radius-pill);
  background: transparent;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}
.page-about .tag-accent {
  border-color: var(--accent);
  color: var(--accent);
}
.page-about .tag-warm {
  border-color: var(--warm);
  color: var(--warm);
}
.page-about .tag-indigo {
  border-color: var(--indigo);
  color: var(--ab-indigo-soft);
}

.page-about .ab-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}
.page-about .ab-partner {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 22px 20px;
  border: var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-hard);
  transition: transform .2s var(--ease), border-color .2s var(--ease);
}
.page-about .ab-partner:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
}
.page-about .ab-partner-num {
  margin: 0;
  font-family: var(--font-num);
  font-weight: 700;
  font-size: clamp(32px, 4vw, 46px);
  line-height: 1;
  color: var(--text);
}
.page-about .ab-partner:nth-child(1) .ab-partner-num { color: var(--accent); }
.page-about .ab-partner:nth-child(2) .ab-partner-num { color: var(--warm); }
.page-about .ab-partner:nth-child(3) .ab-partner-num { color: var(--ab-indigo-soft); }
.page-about .ab-partner-text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
}
.page-about .ab-award {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: clamp(20px, 3vw, 28px);
  padding: 18px 20px;
  border: var(--border);
  border-left: 8px solid var(--wine);
  border-radius: var(--radius);
  background: var(--surface);
}
.page-about .ab-award-year {
  font-family: var(--font-num);
  font-size: var(--fs-m);
  font-weight: 700;
  color: var(--ab-wine-soft);
}
.page-about .ab-award-text {
  margin: 0;
  font-size: var(--fs-s);
  color: var(--text);
}

/* ---------- 结尾动作区 ---------- */
.page-about .ab-cta {
  padding-block: 0 var(--ab-block);
}
.page-about .ab-cta-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 40px);
  padding: clamp(24px, 4vw, 44px);
  border: var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow-hard-lg);
}
.page-about .ab-cta-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.15;
  font-size: clamp(24px, 3vw, 36px);
}
.page-about .ab-cta-text {
  margin: 0;
  max-width: 58ch;
  font-size: var(--fs-s);
  line-height: 1.8;
  color: var(--muted);
}
.page-about .ab-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式增强 ---------- */
@media (min-width: 760px) {
  .page-about .ab-crew-row {
    grid-template-columns: minmax(180px, 1.1fr) 84px minmax(0, 1.9fr);
    grid-template-areas: "role num desc";
    align-items: center;
    gap: 0 18px;
    padding: 22px 10px;
  }
  .page-about .ab-crew-num {
    justify-self: end;
    padding-right: 6px;
  }
  .page-about .ab-partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .ab-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .ab-cta-inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
  }
  .page-about .ab-note-card {
    position: sticky;
    top: 110px;
  }
}

@media (min-width: 960px) {
  .page-about .ab-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(30px, 4.5vw, 72px);
  }
  .page-about .ab-split {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: clamp(30px, 4.5vw, 64px);
  }
  .page-about .ab-split--flip {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
  .page-about .ab-timeline {
    position: relative;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }
  .page-about .ab-timeline::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 34px;
    height: 3px;
    background: var(--line);
    z-index: 0;
  }
}
<<<END>>>