.page-about {
  --about-rail-w: 176px;
  --about-gap: clamp(44px, 5.5vw, 80px);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  padding: 12px 0 0;
  font-size: 13px;
  color: var(--silver);
}
.page-about .about-crumbs a {
  color: var(--silver);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s, border-color .2s;
}
.page-about .about-crumbs a:hover {
  color: var(--lime);
  border-color: var(--lime);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(18px, 3vw, 34px) 0 clamp(34px, 5vw, 62px);
}
.page-about .about-hero-grid {
  display: grid;
  gap: 30px;
  align-items: end;
}
.page-about .about-hero h1 {
  margin: 14px 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 6.6vw, 68px);
  line-height: 1.04;
  letter-spacing: -.015em;
  color: var(--fog);
}
.page-about .about-hero h1 span {
  color: var(--lime);
}
.page-about .about-hero .lead {
  max-width: 54ch;
  margin: 0;
  color: var(--fog);
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.78;
}
.page-about .about-hero-note {
  max-width: 56ch;
  margin: 14px 0 0;
  color: var(--silver);
  font-size: 15px;
  line-height: 1.72;
}
.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}
.page-about .about-hero-figure {
  margin: 0;
}
.page-about .about-hero-figure .figure-media {
  aspect-ratio: 14 / 9;
}
.page-about .about-hero-figure .figure-caption .mono {
  color: var(--teal);
  margin-right: 6px;
}

/* ---------- 主体两栏：左时间轴 + 右内容 ---------- */
.page-about .about-layout {
  display: grid;
  gap: 0;
}

.page-about .about-rail {
  display: none;
}

.page-about .about-section {
  padding: var(--about-gap) 0;
  border-top: 1px solid var(--line);
}
.page-about .about-section:first-child {
  border-top: 0;
  padding-top: clamp(18px, 2.6vw, 30px);
}

/* ---------- 章节头 ---------- */
.page-about .about-section-head {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-bottom: 26px;
}
.page-about .about-section-head h2 {
  margin: 0;
  color: var(--fog);
}
.page-about .about-stamp {
  align-self: flex-start;
  display: inline-block;
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: rgba(79, 224, 192, .06);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--teal);
}

/* ---------- 正文 ---------- */
.page-about .about-prose p {
  margin: 0 0 16px;
  max-width: 68ch;
  color: var(--fog);
  font-size: 16px;
  line-height: 1.78;
}
.page-about .about-prose p:last-child {
  margin-bottom: 0;
}
.page-about .about-prose-lead {
  max-width: 66ch;
  margin: 0 0 26px;
  color: var(--silver);
  font-size: 17px;
  line-height: 1.75;
}
.page-about .about-inline-link {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 255, 61, .45);
  transition: border-color .2s, color .2s;
}
.page-about .about-inline-link:hover {
  color: var(--fog);
  border-color: var(--fog);
}

/* ---------- 数据条 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-bottom: 30px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  overflow: hidden;
}
.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 18px;
  background: linear-gradient(160deg, var(--ink-2), var(--ink));
}
.page-about .about-stat-num {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
  letter-spacing: -.02em;
}
.page-about .about-stat-unit {
  margin-left: 2px;
  font-size: .5em;
  color: var(--teal);
}
.page-about .about-stat-label {
  font-size: 13px;
  color: var(--silver);
}

/* ---------- 覆盖网格 ---------- */
.page-about .about-coverage-body {
  display: grid;
  gap: 26px;
}
.page-about .about-coverage-visual {
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--ink-2);
}
.page-about .about-coverage-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 6px;
}
.page-about .about-coverage-grid span {
  aspect-ratio: 1 / 1;
  border-radius: 3px;
  background: var(--ink-3);
  border: 1px solid var(--line);
}
.page-about .about-coverage-grid span:nth-child(6n+1),
.page-about .about-coverage-grid span:nth-child(11n) {
  background: var(--lime);
  border-color: var(--lime);
}
.page-about .about-coverage-legend {
  margin: 14px 0 0;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--silver);
}

/* ---------- 团队 ---------- */
.page-about .about-team-bar {
  display: flex;
  height: 14px;
  margin-bottom: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  overflow: hidden;
  background: var(--ink-2);
}
.page-about .about-seg {
  display: block;
  height: 100%;
}
.page-about .seg-data { flex: 12; background: var(--lime); }
.page-about .seg-edit { flex: 9; background: var(--teal); }
.page-about .seg-prod { flex: 11; background: var(--orange); }
.page-about .seg-serv { flex: 6; background: var(--silver); }

.page-about .about-team-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--silver);
}
.page-about .about-team-legend li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}
.page-about .about-dot {
  width: 9px;
  height: 9px;
  border-radius: 2px;
  display: inline-block;
}
.page-about .dot-data { background: var(--lime); }
.page-about .dot-edit { background: var(--teal); }
.page-about .dot-prod { background: var(--orange); }
.page-about .dot-serv { background: var(--silver); }

.page-about .about-team-cards {
  display: grid;
  gap: 14px;
}
.page-about .about-team-card {
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  background: var(--ink-2);
  transition: border-color .22s, transform .22s, box-shadow .22s;
}
.page-about .about-team-card:hover,
.page-about .about-team-card:focus-within {
  border-color: var(--lime);
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(0, 0, 0, .34);
}
.page-about .about-team-count {
  display: block;
  margin-bottom: 6px;
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}
.page-about .about-team-card h3 {
  margin: 0 0 8px;
  color: var(--fog);
}
.page-about .about-team-sum {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--silver);
}
.page-about .about-team-detail {
  margin: 0;
  padding: 0 0 0 16px;
  list-style: none;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--silver);
}
.page-about .about-team-detail li {
  position: relative;
  margin-top: 6px;
}
.page-about .about-team-detail li::before {
  content: "";
  position: absolute;
  left: -12px;
  top: 9px;
  width: 5px;
  height: 1px;
  background: var(--teal);
}

.page-about .about-team-figure {
  margin: 30px 0 0;
}
.page-about .about-team-figure .figure-media {
  aspect-ratio: 3 / 2;
}

/* ---------- 更新节奏 ---------- */
.page-about .about-cadence {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  overflow: hidden;
}
.page-about .about-cadence-item {
  display: grid;
  gap: 10px;
  padding: 20px 18px;
  background: var(--ink-2);
  transition: background .22s;
}
.page-about .about-cadence-item:hover {
  background: var(--ink-3);
}
.page-about .about-cadence-time {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--orange);
}
.page-about .about-cadence-body h3 {
  margin: 0 0 8px;
  color: var(--fog);
}
.page-about .about-cadence-body p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.74;
  color: var(--silver);
}

/* ---------- 里程碑 ---------- */
.page-about .about-milestone-figure {
  margin: 0 0 30px;
}
.page-about .about-milestone-figure .figure-media {
  aspect-ratio: 2 / 1;
}
.page-about .about-milestones {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-milestone {
  position: relative;
  display: grid;
  gap: 6px;
  padding: 0 0 28px 26px;
  border-left: 1px solid var(--line);
}
.page-about .about-milestone::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--line);
  transition: background .22s, border-color .22s;
}
.page-about .about-milestone:hover::before {
  background: var(--teal);
  border-color: var(--teal);
}
.page-about .about-milestone--now::before {
  background: var(--lime);
  border-color: var(--lime);
  box-shadow: 0 0 0 5px rgba(201, 255, 61, .14);
}
.page-about .about-milestone-year {
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--teal);
}
.page-about .about-milestone-body h3 {
  margin: 0 0 7px;
  color: var(--fog);
}
.page-about .about-milestone-body p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.74;
  color: var(--silver);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  display: grid;
  gap: 14px;
  margin-bottom: 30px;
}
.page-about .about-partner-card {
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--teal);
  border-radius: var(--radius-m);
  background: var(--ink-2);
  transition: border-color .22s, transform .22s;
}
.page-about .about-partner-card:hover {
  border-color: var(--lime);
  border-top-color: var(--orange);
  transform: translateY(-2px);
}
.page-about .about-partner-num {
  display: block;
  margin-bottom: 8px;
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}
.page-about .about-partner-card h3 {
  margin: 0 0 8px;
  color: var(--fog);
}
.page-about .about-partner-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--silver);
}

.page-about .about-reports-title {
  margin: 0 0 14px;
  color: var(--fog);
}
.page-about .about-reports {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  overflow: hidden;
}
.page-about .about-report {
  padding: 16px 18px;
  background: var(--ink-2);
  transition: background .22s;
}
.page-about .about-report:hover {
  background: var(--ink-3);
}
.page-about .about-report-no {
  display: inline-block;
  margin-right: 10px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--orange);
}
.page-about .about-report-name {
  font-size: 15.5px;
  color: var(--fog);
}
.page-about .about-report-sum {
  margin: 0;
  max-width: 66ch;
  font-size: 14px;
  line-height: 1.72;
  color: var(--silver);
}
.page-about .about-partners-note {
  margin: 22px 0 0;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.74;
  color: var(--silver);
}

/* ---------- 联系 ---------- */
.page-about .about-section--reach {
  padding-bottom: clamp(56px, 7vw, 96px);
}
.page-about .about-contact-list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  overflow: hidden;
}
.page-about .about-contact-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px;
  background: var(--ink-2);
}
.page-about .about-contact-label {
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--silver);
}
.page-about .about-contact-value {
  font-size: 17px;
  color: var(--fog);
  word-break: break-word;
}
.page-about .about-contact-note {
  margin-top: 18px;
  padding: 16px 18px;
  border: 1px dashed var(--line);
  border-radius: var(--radius-m);
  background: rgba(255, 106, 43, .05);
}
.page-about .about-contact-note p {
  margin: 0;
  max-width: 68ch;
  font-size: 14.5px;
  line-height: 1.74;
  color: var(--silver);
}

/* ---------- 悬停展开（仅在具备悬停能力的宽屏上折叠） ---------- */
@media (hover: hover) and (min-width: 720px) {
  .page-about .about-team-detail {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height .32s ease, opacity .24s ease, margin .32s ease;
  }
  .page-about .about-team-card:hover .about-team-detail,
  .page-about .about-team-card:focus-within .about-team-detail {
    max-height: 220px;
    opacity: 1;
    margin-top: 12px;
  }
  .page-about .about-report-sum {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height .3s ease, opacity .24s ease, margin .3s ease;
  }
  .page-about .about-report:hover .about-report-sum {
    max-height: 140px;
    opacity: 1;
    margin-top: 10px;
  }
  .page-about .about-report:hover .about-report-name {
    color: var(--lime);
  }
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-stat {
    padding: 24px 22px;
  }
  .page-about .about-team-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }
  .page-about .about-partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-cadence-item {
    grid-template-columns: 152px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
    padding: 22px;
  }
  .page-about .about-contact-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-contact-item {
    padding: 20px 22px;
  }
}

/* ---------- 桌面：首屏分栏 + 左时间轴 ---------- */
@media (min-width: 920px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
    gap: clamp(30px, 4.5vw, 68px);
  }
  .page-about .about-coverage-body {
    grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
    gap: clamp(26px, 4vw, 56px);
    align-items: start;
  }
  .page-about .about-coverage-visual {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

@media (min-width: 1020px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(30px, 4vw, 64px);
    align-items: start;
  }
  .page-about .about-rail {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 20px);
    align-self: start;
    padding-top: 8px;
  }
  .page-about .about-rail-title {
    margin: 0 0 14px;
    font-size: 11px;
    letter-spacing: .22em;
    color: var(--silver);
  }
  .page-about .about-rail-list {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 2px;
    border-left: 1px solid var(--line);
  }
  .page-about .about-rail-link {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 8px 8px 8px 16px;
    border-radius: 0 8px 8px 0;
    color: var(--silver);
    font-size: 13px;
    line-height: 1.35;
    text-decoration: none;
    transition: color .2s, background .2s;
  }
  .page-about .about-rail-link::before {
    content: "";
    position: absolute;
    left: -4.5px;
    top: 13px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--ink);
    border: 1px solid var(--line);
    transition: background .2s, border-color .2s, box-shadow .2s;
  }
  .page-about .about-rail-link:hover {
    color: var(--fog);
    background: rgba(201, 255, 61, .05);
  }
  .page-about .about-rail-link:hover::before {
    border-color: var(--teal);
  }
  .page-about .about-rail-link[aria-current="location"] {
    color: var(--fog);
    background: rgba(201, 255, 61, .08);
  }
  .page-about .about-rail-link[aria-current="location"]::before {
    background: var(--lime);
    border-color: var(--lime);
    box-shadow: 0 0 0 4px rgba(201, 255, 61, .14);
  }
  .page-about .about-rail-year {
    font-size: 11px;
    letter-spacing: .1em;
    color: var(--teal);
  }
}

@media (min-width: 1180px) {
  .page-about {
    --about-rail-w: 196px;
  }
}

/* ---------- 减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-team-card,
  .page-about .about-partner-card,
  .page-about .about-team-detail,
  .page-about .about-report,
  .page-about .about-report-sum {
    transition: none !important;
    transform: none !important;
  }
}
<<<END>>>