.page-about {
  --about-rail: 220px;
  background: var(--porcelain);
  color: var(--ink);
}

/* ---------- Hero ---------- */
.page-about .about-hero {
  position: relative;
  padding: 44px 0 64px;
  background-color: var(--porcelain);
  background-image:
    radial-gradient(900px 520px at 90% -14%, rgba(255, 179, 71, .44), transparent 70%),
    radial-gradient(680px 460px at -6% 112%, rgba(255, 90, 60, .22), transparent 70%);
  overflow: hidden;
}

.page-about .about-hero-grid {
  display: grid;
  gap: 32px;
}

.page-about .about-hero-copy .breadcrumb {
  margin-bottom: 18px;
}

.page-about .about-hero-copy .kicker {
  margin: 0 0 14px;
}

.page-about .about-hero-copy h1 {
  margin: 0 0 18px;
  max-width: 15em;
}

.page-about .about-hero-copy .lede {
  margin: 0 0 26px;
}

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

.page-about .hero-snapshot {
  margin: 0;
  background: var(--ink);
  color: var(--porcelain);
  border-color: var(--ink-deep);
  padding: 26px 24px;
}

.page-about .snapshot-tag {
  margin: 0 0 16px;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--gold);
}

.page-about .snapshot-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .snapshot-list li {
  display: grid;
  gap: 4px;
  padding-bottom: 12px;
  border-bottom: 1px dashed rgba(252, 251, 249, .28);
}

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

.page-about .snapshot-key {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-about .snapshot-val {
  font-size: 15px;
  line-height: 1.6;
  color: var(--porcelain);
}

/* ---------- 主布局：粘性索引 + 内容流 ---------- */
.page-about .profile-shell {
  display: grid;
  gap: 32px;
  padding-bottom: 96px;
}

.page-about .profile-rail {
  position: static;
}

.page-about .rail-title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--graphite);
}

.page-about .rail-list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-about .rail-list li {
  flex: 0 0 auto;
}

.page-about .rail-list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 2px solid var(--ink-deep);
  border-radius: 999px;
  background: var(--white);
  color: var(--ink);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: var(--shadow-hard-sm);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease), background-color .18s var(--ease), border-color .18s var(--ease);
}

.page-about .rail-num {
  font-size: 12px;
  color: var(--orange);
}

.page-about .rail-list a:hover,
.page-about .rail-list a:focus-visible {
  background: var(--peach);
  border-color: var(--orange);
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--ink-deep);
  outline: none;
}

.page-about .profile-stream {
  display: grid;
  gap: 56px;
  min-width: 0;
}

/* ---------- 区块通用 ---------- */
.page-about .profile-block {
  padding: 32px 22px 36px;
  border: 2px solid var(--ink-deep);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-hard);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-about .block--paper { background: var(--porcelain); }
.page-about .block--cream { background: var(--cream); }
.page-about .block--ink { background: var(--ink); color: var(--porcelain); border-color: var(--ink-deep); }

.page-about .block-head {
  margin-bottom: 28px;
}

.page-about .block-head .kicker {
  margin: 0 0 12px;
}

.page-about .block-head h2 {
  margin: 0 0 14px;
  max-width: 18em;
}

.page-about .block-head .lede {
  margin: 0;
  max-width: 44em;
}

.page-about .block-head--onink .lede {
  color: rgba(252, 251, 249, .82);
}

.page-about .block-head--onink .kicker {
  color: var(--gold);
}

.page-about .block-figure {
  margin: 0 0 32px;
  border: 2px solid var(--ink-deep);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, var(--peach), var(--cream));
  box-shadow: var(--shadow-hard);
  position: relative;
}

.page-about .block-figure--soft {
  box-shadow: var(--shadow-hard-sm);
}

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

.page-about .figure-cap {
  position: absolute;
  left: 14px;
  bottom: 14px;
  margin: 0;
  padding: 6px 12px;
  font-size: 12px;
  letter-spacing: .08em;
  background: var(--porcelain);
  border: 2px solid var(--ink-deep);
  border-radius: 999px;
  color: var(--ink);
}

/* ---------- 01 档案卡 ---------- */
.page-about .dossier-grid {
  display: grid;
  gap: 18px;
}

.page-about .dossier-card {
  padding: 22px 20px 20px;
  border: 2px dashed var(--ink-deep);
  border-radius: var(--radius-md);
  background: var(--white);
  transition: border-color .18s var(--ease), transform .18s var(--ease);
}

.page-about .dossier-card--peach {
  background: var(--peach);
  border-style: solid;
}

.page-about .dossier-card:hover {
  border-color: var(--orange);
  transform: translateY(-3px);
}

.page-about .dossier-no {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--orange);
}

.page-about .dossier-title {
  margin: 0 0 10px;
}

.page-about .dossier-card p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.8;
  max-width: 40em;
}

.page-about .dossier-foot {
  margin: 0;
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--graphite);
}

/* ---------- 02 时间轴 ---------- */
.page-about .timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 4px 0 0 44px;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 10px;
  bottom: 14px;
  width: 3px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--orange), var(--gold));
}

.page-about .tl-item {
  position: relative;
  padding-bottom: 34px;
}

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

.page-about .tl-node {
  position: absolute;
  left: -34px;
  top: 6px;
  width: 15px;
  height: 15px;
  background: var(--teal);
  border: 2px solid var(--ink-deep);
  box-shadow: 2px 2px 0 var(--ink-deep);
  transition: transform .18s var(--ease), background-color .18s var(--ease);
}

.page-about .tl-node--gold {
  background: var(--gold);
}

.page-about .tl-item:hover .tl-node {
  transform: scale(1.18);
  background: var(--orange);
}

.page-about .tl-mark {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 6px;
}

.page-about .tl-ver {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--ink);
}

.page-about .tl-item--current .tl-ver {
  color: var(--orange);
}

.page-about .tl-year {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--graphite);
}

.page-about .tl-body h3 {
  margin: 0 0 8px;
}

.page-about .tl-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--graphite);
  max-width: 44em;
}

.page-about .tl-item--current .tl-body p {
  color: var(--ink);
}

/* ---------- 03 团队 ---------- */
.page-about .team-split {
  display: grid;
  gap: 26px;
  margin-bottom: 28px;
}

.page-about .team-figure {
  margin: 0;
  border: 2px solid var(--ink-deep);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, var(--cream), var(--peach));
  box-shadow: var(--shadow-hard-sm);
}

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

.page-about .team-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.page-about .team-stats .stat {
  display: grid;
  gap: 4px;
  align-content: start;
  padding: 16px 14px;
  background: var(--white);
  border: 2px solid var(--ink-deep);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-hard-sm);
}

.page-about .team-stats .stat-num {
  display: block;
  font-size: 34px;
  line-height: 1.1;
}

.page-about .team-stats .stat-label {
  display: block;
  font-size: 13px;
  line-height: 1.6;
  color: var(--graphite);
}

.page-about .team-notes {
  display: grid;
  gap: 16px;
}

.page-about .note-card {
  padding: 20px 18px;
  border: 2px solid var(--ink-deep);
  border-radius: var(--radius-md);
  background: var(--white);
}

.page-about .note-card--teal {
  background: var(--peach);
  border-left: 10px solid var(--teal);
}

.page-about .note-card h3 {
  margin: 0 0 8px;
  font-size: 14px;
  letter-spacing: .06em;
  color: var(--orange);
}

.page-about .note-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  max-width: 40em;
}

/* ---------- 04 覆盖与人群 ---------- */
.page-about .reach-band {
  padding: 22px 18px;
  border: 2px solid var(--gold);
  border-radius: var(--radius-md);
  margin-bottom: 28px;
}

.page-about .stat-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 14px;
  margin-bottom: 16px;
}

.page-about .stat--onink .stat-num {
  display: block;
  font-size: 32px;
  line-height: 1.1;
  color: var(--porcelain);
}

.page-about .stat--onink .stat-num--gold { color: var(--gold); }
.page-about .stat--onink .stat-num--teal { color: var(--teal); }

.page-about .stat--onink .stat-label {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  color: rgba(252, 251, 249, .74);
}

.page-about .reach-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(252, 251, 249, .82);
}

.page-about .crowd-tabs {
  margin-top: 8px;
}

.page-about .crowd-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-about .crowd-labels {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

.page-about .crowd-label {
  display: inline-flex;
  align-items: center;
  padding: 9px 20px;
  font-size: 14px;
  letter-spacing: .06em;
  border: 2px solid var(--ink-deep);
  border-radius: 999px;
  background: var(--white);
  color: var(--ink);
  cursor: pointer;
  transition: background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease), transform .18s var(--ease);
}

.page-about .crowd-label:hover {
  border-color: var(--orange);
  transform: translateY(-2px);
}

.page-about #crowd-commute:checked ~ .crowd-labels label[for="crowd-commute"],
.page-about #crowd-office:checked ~ .crowd-labels label[for="crowd-office"],
.page-about #crowd-campus:checked ~ .crowd-labels label[for="crowd-campus"],
.page-about #crowd-home:checked ~ .crowd-labels label[for="crowd-home"] {
  background: var(--orange);
  color: var(--white);
  border-color: var(--ink-deep);
  box-shadow: var(--shadow-hard-sm);
}

.page-about #crowd-commute:focus-visible ~ .crowd-labels label[for="crowd-commute"],
.page-about #crowd-office:focus-visible ~ .crowd-labels label[for="crowd-office"],
.page-about #crowd-campus:focus-visible ~ .crowd-labels label[for="crowd-campus"],
.page-about #crowd-home:focus-visible ~ .crowd-labels label[for="crowd-home"] {
  outline: 3px solid var(--teal);
  outline-offset: 2px;
}

.page-about .crowd-panel {
  display: none;
  padding: 22px 20px;
  border: 2px solid var(--ink-deep);
  border-left: 10px solid var(--teal);
  border-radius: var(--radius-md);
  background: rgba(252, 251, 249, .06);
}

.page-about #crowd-commute:checked ~ .crowd-panels .crowd-panel[data-for="commute"],
.page-about #crowd-office:checked ~ .crowd-panels .crowd-panel[data-for="office"],
.page-about #crowd-campus:checked ~ .crowd-panels .crowd-panel[data-for="campus"],
.page-about #crowd-home:checked ~ .crowd-panels .crowd-panel[data-for="home"] {
  display: block;
}

.page-about .crowd-panel h3 {
  margin: 0 0 10px;
  color: var(--porcelain);
}

.page-about .crowd-panel p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(252, 251, 249, .86);
  max-width: 42em;
}

.page-about .crowd-panel .dot-list {
  margin: 0;
  color: rgba(252, 251, 249, .86);
}

.page-about .crowd-panel .dot-list li {
  font-size: 15px;
  line-height: 1.8;
}

/* ---------- 05 合作 ---------- */
.page-about .partner-grid {
  display: grid;
  gap: 16px;
}

.page-about .partner-card {
  padding: 20px 18px;
  border: 2px solid var(--ink-deep);
  border-radius: var(--radius-md);
  background: var(--white);
  box-shadow: var(--shadow-hard-sm);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease), border-color .18s var(--ease);
}

.page-about .partner-card:hover {
  transform: translateY(-4px);
  border-color: var(--orange);
  box-shadow: var(--shadow-hard);
}

.page-about .partner-card--focus {
  background: linear-gradient(135deg, var(--peach), var(--cream));
}

.page-about .partner-no {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--orange);
}

.page-about .partner-card h3 {
  margin: 0 0 8px;
}

.page-about .partner-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--graphite);
  max-width: 38em;
}

/* ---------- 06 运营节奏 ---------- */
.page-about .rhythm-layout {
  display: grid;
  gap: 26px;
  margin-bottom: 34px;
}

.page-about .rhythm-copy p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
  max-width: 42em;
}

.page-about .rhythm-copy p:last-child {
  margin-bottom: 0;
}

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

.page-about .rhythm-list li {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 16px;
  border: 2px solid var(--ink-deep);
  border-radius: var(--radius-sm);
  background: var(--white);
  box-shadow: var(--shadow-hard-sm);
}

.page-about .rhythm-num {
  font-size: 28px;
  line-height: 1;
  color: var(--orange);
  min-width: 2.4em;
}

.page-about .rhythm-text {
  font-size: 14px;
  line-height: 1.6;
  color: var(--graphite);
}

.page-about .closing-cta {
  padding: 24px 20px;
  border: 2px solid var(--ink-deep);
  border-radius: var(--radius-lg);
  background: var(--peach);
  box-shadow: var(--shadow-hard-sm);
}

.page-about .closing-line {
  margin: 0 0 16px;
  font-size: 17px;
  line-height: 1.7;
  color: var(--ink);
}

.page-about .closing-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.7fr) minmax(260px, 1fr);
    gap: 40px;
    align-items: end;
  }

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

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

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

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

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding: 64px 0 88px;
  }

  .page-about .profile-shell {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 56px;
    padding-bottom: 120px;
  }

  .page-about .profile-rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }

  .page-about .rail-list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
    gap: 6px;
  }

  .page-about .rail-list a {
    width: 100%;
    border-radius: var(--radius-sm);
    box-shadow: none;
    justify-content: flex-start;
  }

  .page-about .profile-stream {
    gap: 72px;
  }

  .page-about .profile-block {
    padding: 44px 40px 48px;
  }

  .page-about .team-split {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    gap: 32px;
    align-items: start;
  }

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

  .page-about .rhythm-layout {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

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

  .page-about .closing-cta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 28px 32px;
  }

  .page-about .closing-line {
    margin: 0;
  }
}

@media (min-width: 1280px) {
  .page-about .dossier-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .block-figure {
    margin-bottom: 40px;
  }
}

@media (max-width: 480px) {
  .page-about .team-stats {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .stat-row {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .rhythm-num {
    font-size: 22px;
  }

  .page-about .timeline {
    padding-left: 34px;
  }

  .page-about .timeline::before {
    left: 11px;
  }

  .page-about .tl-node {
    left: -28px;
    width: 13px;
    height: 13px;
  }
}