.page-about {
  --team-1: #CBE9DE;
  --team-2: #A6DDCB;
  --team-3: #79CFB4;
  --team-4: #4FC3A1;
  background: var(--sand);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about p {
  margin: 0 0 14px;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.015em;
  margin: 0;
}

.page-about a {
  color: var(--volt);
}

.page-about .breadcrumb {
  padding-top: 22px;
  font-size: 13px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  background: linear-gradient(180deg, var(--sand-2) 0%, var(--sand) 82%);
  padding-bottom: clamp(26px, 5vw, 56px);
}

.page-about .hero-grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  padding-top: clamp(20px, 4vw, 40px);
}

.page-about h1 {
  font-size: clamp(30px, 6.4vw, 58px);
  line-height: 1.15;
  margin-top: 12px;
}

.page-about .lede {
  color: var(--ink-2);
  margin: 16px 0 0;
  max-width: 34em;
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .hero-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--ink);
  align-self: end;
}

.page-about .hero-stats li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(33, 42, 38, 0.14);
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-size: clamp(21px, 3.2vw, 30px);
  font-weight: 700;
  min-width: 3.4em;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.page-about .stat-label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-2);
}

/* ---------- 通用章节 ---------- */
.page-about .section {
  padding: clamp(38px, 6vw, 76px) 0;
}

.page-about .section--team,
.page-about .section--partners {
  background: var(--paper);
}

.page-about .section--archive {
  background: var(--sand-2);
}

.page-about .section-head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: clamp(14px, 2vw, 22px);
}

.page-about .sec-num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 5vw, 46px);
  font-weight: 700;
  line-height: 1;
  color: var(--flame);
  letter-spacing: -0.03em;
  transform: skewY(-2deg);
}

.page-about h2 {
  font-size: clamp(23px, 3.6vw, 34px);
  line-height: 1.2;
}

.page-about h3 {
  font-size: clamp(17px, 2.2vw, 20px);
  line-height: 1.4;
  margin-bottom: 8px;
}

.page-about .section-intro {
  color: var(--ink-2);
  max-width: 40em;
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-about .mono-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--archive-2);
  margin: 0 0 10px;
  text-transform: uppercase;
}

/* ---------- 01 起源 ---------- */
.page-about .origin-grid {
  display: grid;
  gap: clamp(22px, 3.5vw, 40px);
}

.page-about .origin-card {
  background: var(--mint-mist);
  padding: clamp(18px, 3vw, 26px);
}

.page-about .origin-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .origin-list li {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 6px 14px;
  padding: 11px 0;
  border-bottom: 1px dashed rgba(46, 158, 123, 0.4);
}

.page-about .origin-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .origin-key {
  font-weight: 700;
}

.page-about .origin-note {
  font-size: 13px;
  color: var(--ink-2);
}

/* ---------- 02 团队 ---------- */
.page-about .team-figure {
  margin: 0 0 clamp(22px, 3vw, 32px);
}

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

.page-about .team-grid {
  list-style: none;
  margin: 0 0 clamp(24px, 3.5vw, 36px);
  padding: 0;
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
}

.page-about .team-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 20px;
  min-height: 118px;
  text-decoration: none;
  color: var(--ink);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
  transition: transform 180ms var(--ease), box-shadow 180ms var(--ease);
}

.page-about .team-card--1 { background: var(--team-1); }
.page-about .team-card--2 { background: var(--team-2); }
.page-about .team-card--3 { background: var(--team-3); }
.page-about .team-card--4 { background: var(--team-4); }

.page-about .team-card:hover,
.page-about .team-card:focus-visible {
  transform: translateY(-4px) translateX(-2px);
  box-shadow: 6px 6px 0 rgba(33, 42, 38, 0.16);
}

.page-about .team-card:focus-visible {
  outline: 3px solid var(--volt);
  outline-offset: 2px;
}

.page-about .team-key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: rgba(33, 42, 38, 0.62);
}

.page-about .team-name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.3;
}

.page-about .team-hint {
  font-size: 13px;
  color: var(--ink-2);
}

.page-about .team-details {
  display: grid;
  gap: clamp(18px, 2.6vw, 26px);
}

.page-about .team-detail {
  border-left: 3px solid var(--mint);
  padding-left: 16px;
  scroll-margin-top: 90px;
}

.page-about .team-detail p {
  color: var(--ink-2);
  margin: 0;
}

.page-about .flow {
  list-style: none;
  margin: clamp(26px, 4vw, 38px) 0 0;
  padding: 18px 0 0;
  border-top: 1px dashed var(--archive);
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}

.page-about .flow li {
  display: grid;
  gap: 4px;
  font-size: 14px;
  color: var(--ink-2);
}

.page-about .flow-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--flame);
  letter-spacing: 0.08em;
}

.page-about .flow strong {
  font-family: var(--font-display);
  font-size: 17px;
  color: var(--ink);
}

/* ---------- 03 档案 ---------- */
.page-about .archive-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}

.page-about .archive-panel {
  background: var(--paper);
  padding: clamp(18px, 3vw, 26px);
  border-top: 3px solid var(--mint);
}

.page-about .archive-panel h3 {
  font-size: 18px;
}

.page-about .archive-panel p {
  color: var(--ink-2);
  margin: 0;
  font-size: 15px;
}

.page-about .archive-note {
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 12px 16px;
  background: var(--mint-mist);
  border-left: 3px solid var(--mint-deep);
  font-size: 15px;
  color: var(--ink);
}

/* ---------- 04 时间线 ---------- */
.page-about .history-grid {
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 6px 0 0 40px;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--mint) 0%, var(--mint-mist) 58%, var(--archive) 100%);
}

.page-about .tl-item {
  position: relative;
  padding-bottom: clamp(22px, 3vw, 32px);
}

.page-about .tl-item:last-child {
  padding-bottom: 0;
}

.page-about .tl-dot {
  position: absolute;
  left: -36px;
  top: 8px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--sand);
  border: 3px solid var(--mint);
  box-sizing: border-box;
}

.page-about .tl-item--key .tl-dot {
  border-color: var(--flame);
  background: var(--flame);
}

.page-about .tl-year {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(19px, 3vw, 26px);
  color: var(--archive-2);
  letter-spacing: 0.01em;
  line-height: 1.3;
}

.page-about .tl-item--key .tl-year {
  color: var(--ink);
}

.page-about .tl-body p {
  color: var(--ink-2);
  margin: 0;
  font-size: 15px;
}

.page-about .tl-extra {
  font-size: 14px;
  color: var(--ink-2);
  opacity: 0.92;
  margin-top: 8px !important;
  padding-left: 12px;
  border-left: 2px solid var(--mint-mist);
}

.page-about .history-figure {
  margin: 0;
}

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

/* ---------- 05 伙伴 ---------- */
.page-about .partners-grid {
  display: grid;
  gap: clamp(22px, 3.5vw, 40px);
  align-items: center;
}

.page-about .partners-figure {
  margin: 0;
  max-width: 420px;
}

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

.page-about .partner-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .partner-list li {
  font-size: 15px;
  color: var(--ink-2);
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--archive);
}

.page-about .partner-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .partner-tag {
  display: inline-block;
  margin-right: 10px;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--mint-mist);
  color: var(--mint-deep);
  font-size: 12px;
  letter-spacing: 0.08em;
}

/* ---------- 06 联系 ---------- */
.page-about .reach-grid {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-about .reach-copy p {
  color: var(--ink-2);
  max-width: 36em;
}

.page-about .reach-card {
  background: var(--paper);
  padding: clamp(20px, 3vw, 28px);
  border-top: 3px solid var(--volt);
}

.page-about .reach-line {
  margin: 0 0 10px;
  font-size: 15px;
}

.page-about .contact-mono {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(15px, 2.4vw, 19px);
  color: var(--ink);
  word-break: break-all;
}

.page-about .reach-line--muted {
  color: var(--ink-2);
  font-size: 14px;
  margin-bottom: 20px;
}

.page-about .reach-foot {
  margin-top: clamp(18px, 3vw, 24px);
  font-size: 14px;
  color: var(--ink-2);
}

/* ---------- 收尾职能色带 ---------- */
.page-about .crew-band {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2px;
  margin-top: clamp(10px, 2vw, 20px);
}

.page-about .crew-seg {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 76px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.page-about .crew-seg--1 { background: var(--team-1); }
.page-about .crew-seg--2 { background: var(--team-2); }
.page-about .crew-seg--3 { background: var(--team-3); }
.page-about .crew-seg--4 { background: var(--mint-deep); color: var(--paper); }

/* ---------- 平板与桌面 ---------- */
@media (min-width: 620px) {
  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-about .flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px 24px;
  }

  .page-about .crew-band {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-about .crew-seg {
    min-height: 92px;
  }
}

@media (min-width: 820px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
    align-items: end;
  }

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

  .page-about .tl-item {
    display: grid;
    grid-template-columns: 132px minmax(0, 1fr);
    column-gap: 22px;
    align-items: start;
  }

  .page-about .tl-year {
    text-align: left;
    padding-top: 2px;
  }

  .page-about .tl-extra {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin-top: 0 !important;
    transition: max-height 300ms var(--ease), opacity 300ms var(--ease), margin-top 300ms var(--ease);
  }

  .page-about .tl-item:hover .tl-extra,
  .page-about .tl-item:focus-within .tl-extra {
    max-height: 140px;
    opacity: 1;
    margin-top: 8px !important;
  }

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

@media (min-width: 960px) {
  .page-about .origin-grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.6fr);
    align-items: start;
  }

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

  .page-about .team-figure img {
    max-height: 420px;
  }

  .page-about .team-details {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 34px;
  }

  .page-about .history-grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 0.68fr);
    align-items: start;
  }

  .page-about .history-figure {
    position: sticky;
    top: 40px;
  }

  .page-about .partners-grid {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
  }

  .page-about .partners-figure {
    max-width: none;
  }

  .page-about .reach-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-about .crew-seg {
    min-height: 120px;
    font-size: 19px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .tl-extra {
    transition: none;
  }

  .page-about .team-card:hover,
  .page-about .team-card:focus-visible {
    transform: none;
  }
}