.page-about {
  --about-axis: 132px;
  --about-gap: clamp(20px, 3.6vw, 56px);
  background-color: var(--asphalt-950);
  color: var(--fog);
  font-family: var(--body);
  font-size: 17px;
  line-height: 1.85;
  overflow-x: clip;
  padding-bottom: clamp(48px, 7vw, 96px);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  padding-top: clamp(76px, 11vh, 104px);
}
.page-about .about-crumb .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--fog-dim);
}
.page-about .about-crumb .breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.page-about .about-crumb .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: var(--hairline);
}
.page-about .about-crumb .breadcrumb-link {
  color: var(--fog-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.page-about .about-crumb .breadcrumb-link:hover,
.page-about .about-crumb .breadcrumb-link:focus-visible {
  color: var(--amber-200);
  border-bottom-color: var(--neon);
}
.page-about .about-crumb [aria-current="page"] {
  color: var(--amber-200);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-top: clamp(30px, 5vw, 56px);
  background:
    radial-gradient(120% 90% at 92% -8%, rgba(240, 160, 60, .18), transparent 58%),
    radial-gradient(90% 60% at 0% 8%, rgba(69, 224, 206, .07), transparent 68%);
}
.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
}
.page-about .about-kicker {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 clamp(18px, 3vw, 26px);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--amber-200);
}
.page-about .about-kicker::before {
  content: "";
  width: 30px;
  height: 1px;
  background: var(--amber-500);
}
.page-about .about-hero-title {
  margin: 0;
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(46px, 8.8vw, 126px);
  line-height: .9;
  letter-spacing: -.035em;
  color: var(--paper);
}
.page-about .about-hero-title-b {
  display: block;
  margin-left: clamp(22px, 8vw, 176px);
  color: var(--amber-200);
  overflow-wrap: anywhere;
}
.page-about .about-hero-lede {
  max-width: 60ch;
  margin: clamp(24px, 4vw, 38px) 0 0;
  font-size: 17px;
  line-height: 1.85;
  color: var(--fog);
}
.page-about .about-scale {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: clamp(28px, 5vw, 46px);
}
.page-about .about-scale-line {
  flex: 1 1 auto;
  max-width: 380px;
  height: 1px;
  background: linear-gradient(90deg, var(--amber-500), var(--hairline) 70%, transparent);
}
.page-about .about-scale-dot {
  width: 6px;
  height: 6px;
  flex: 0 0 auto;
}
.page-about .about-scale-dot-1 { background: var(--lg-1); }
.page-about .about-scale-dot-2 { background: var(--lg-2); }
.page-about .about-scale-dot-3 { background: var(--lg-3); }
.page-about .about-scale-dot-4 { background: var(--lg-5); }
.page-about .about-scale-dot-5 { background: var(--lg-6); }

.page-about .about-hero-media {
  margin: clamp(34px, 6vw, 68px) auto 0;
  padding: 0 var(--gutter);
}
.page-about .about-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 1;
  object-fit: cover;
  border-radius: 24px;
  border: 1px solid var(--hairline);
  box-shadow: var(--shadow-card);
  filter: brightness(.9) saturate(.92);
}

/* ---------- 档案墙 ---------- */
.page-about .about-wall {
  position: relative;
}
.page-about .about-entry {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  padding-block: clamp(44px, 6.4vw, 84px);
  border-top: 1px solid var(--hairline);
}
.page-about .about-stamp {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  align-self: start;
  justify-self: start;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--fog-dim);
  white-space: nowrap;
}
.page-about .about-stamp-num {
  font-family: var(--display);
  font-weight: 800;
  font-size: 28px;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--amber-500);
  font-variant-numeric: tabular-nums;
}
.page-about .about-title {
  margin: 0 0 clamp(14px, 2vw, 20px);
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(28px, 3.4vw, 46px);
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--paper);
}
.page-about .about-lede {
  margin: 0 0 20px;
  font-size: 18px;
  line-height: 1.8;
  color: var(--amber-200);
}
.page-about .about-text {
  margin: 0 0 18px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.9;
  color: var(--fog);
}
.page-about .about-text:last-child {
  margin-bottom: 0;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  margin: clamp(26px, 4vw, 38px) 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-tl-item {
  position: relative;
  padding: 0 0 clamp(26px, 3.6vw, 36px) clamp(22px, 3vw, 32px);
  border-left: 1px solid var(--hairline);
}
.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: -3.5px;
  top: 11px;
  width: 6px;
  height: 6px;
  background: var(--amber-500);
}
.page-about .about-tl-item:last-child {
  padding-bottom: 4px;
  border-left-color: transparent;
}
.page-about .about-tl-year {
  display: block;
  margin-bottom: 4px;
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--amber-500);
  font-variant-numeric: tabular-nums;
}
.page-about .about-tl-title {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--paper);
}
.page-about .about-tl-text {
  margin: 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--fog);
}

/* ---------- 排班表 ---------- */
.page-about .about-schedule {
  width: 100%;
  margin: clamp(22px, 4vw, 34px) 0 0;
  border-collapse: collapse;
  font-size: 15px;
}
.page-about .about-schedule caption {
  padding-bottom: 12px;
  text-align: left;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--fog-dim);
}
.page-about .about-schedule th,
.page-about .about-schedule td {
  padding: 14px 12px 14px 0;
  border-bottom: 1px solid var(--hairline);
  text-align: left;
  vertical-align: top;
}
.page-about .about-schedule thead th {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: .1em;
  color: var(--fog-dim);
}
.page-about .about-schedule td:first-child {
  width: 32%;
  color: var(--amber-200);
  font-variant-numeric: tabular-nums;
}
.page-about .about-schedule td:nth-child(2) {
  color: var(--fog);
}
.page-about .about-schedule td:nth-child(3) {
  color: var(--fog-dim);
}
.page-about .about-schedule tbody tr:last-child td {
  border-bottom: 0;
}
.page-about .about-shift-media {
  margin: clamp(24px, 4vw, 36px) 0 0;
}
.page-about .about-shift-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 20px;
  border: 1px solid var(--hairline);
}
.page-about .about-shift-media figcaption,
.page-about .about-pitch figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--fog-dim);
}

/* ---------- 选片标准 ---------- */
.page-about .about-standards {
  margin: clamp(22px, 3.4vw, 32px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: clamp(20px, 3vw, 30px);
}
.page-about .about-standard {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding-left: 16px;
  border-left: 1px solid var(--amber-500);
}
.page-about .about-standard-num {
  font-family: var(--display);
  font-weight: 800;
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: -.02em;
  color: var(--violet);
  font-variant-numeric: tabular-nums;
}
.page-about .about-standard-title {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 700;
  color: var(--paper);
}
.page-about .about-pitch {
  margin: clamp(28px, 4.4vw, 44px) 0 0;
}
.page-about .about-pitch img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
  border-radius: 20px;
  border: 1px solid var(--hairline);
}

/* ---------- 团队分工 ---------- */
.page-about .about-roles {
  display: grid;
  gap: 0;
  margin: clamp(20px, 3vw, 28px) 0 clamp(22px, 3vw, 30px);
}
.page-about .about-role {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 16px;
  padding: 18px 0;
  border-top: 1px solid var(--hairline);
}
.page-about .about-role:last-child {
  border-bottom: 1px solid var(--hairline);
}
.page-about .about-role-num {
  grid-row: span 2;
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(34px, 4.4vw, 48px);
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--neon);
  font-variant-numeric: tabular-nums;
}
.page-about .about-role-title {
  margin: 0 0 4px;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}
.page-about .about-role .about-text {
  grid-column: 2;
  margin: 0;
  font-size: 15px;
}

/* ---------- 指标阅读带 ---------- */
.page-about .about-entry--paper {
  margin-block: clamp(34px, 5vw, 56px);
  padding: clamp(28px, 5vw, 56px) clamp(20px, 4vw, 48px);
  background: var(--paper);
  border-top: 0;
  border-radius: 24px;
  color: var(--ink);
}
.page-about .about-entry--paper .about-title {
  color: var(--ink);
}
.page-about .about-entry--paper .about-text {
  color: #4A4F58;
}
.page-about .about-entry--paper .about-stamp {
  color: #7A7F88;
}
.page-about .about-entry--paper .about-stamp-num {
  color: var(--ember-700);
}
.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 36px);
  margin-top: clamp(22px, 3.6vw, 34px);
}
.page-about .about-metric {
  padding-top: 17px;
  border-top: 1px solid rgba(31, 34, 41, .16);
}
.page-about .about-metric-num {
  display: block;
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(38px, 5.6vw, 66px);
  line-height: .95;
  letter-spacing: -.03em;
  color: var(--ember-700);
  font-variant-numeric: tabular-nums;
}
.page-about .about-metric-unit {
  font-size: .46em;
  margin-left: 4px;
  letter-spacing: 0;
}
.page-about .about-metric-label {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.65;
  letter-spacing: .01em;
  color: #5A5F68;
}

/* ---------- 结尾与回顶 ---------- */
.page-about .about-entry--next {
  border-top: 0;
  padding-top: 0;
}
.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 28px);
}
.page-about .about-foot {
  display: flex;
  justify-content: flex-end;
  padding-top: clamp(16px, 3vw, 28px);
  border-top: 1px solid var(--hairline);
}
.page-about .about-top-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--fog-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.page-about .about-top-link::before {
  content: "↑";
  color: var(--amber-500);
  font-size: 14px;
}
.page-about .about-top-link:hover,
.page-about .about-top-link:focus-visible {
  color: var(--amber-200);
  border-bottom-color: var(--neon);
}

/* ---------- 焦点可见性 ---------- */
.page-about a:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 3px;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 900px) {
  .page-about .about-entry {
    grid-template-columns: var(--about-axis) minmax(0, 1fr);
    gap: var(--about-gap);
  }
  .page-about .about-stamp {
    position: sticky;
    top: calc(var(--pill-top) + 76px);
  }
  .page-about .about-entry--paper .about-stamp {
    position: static;
  }
  .page-about .about-roles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 clamp(20px, 3vw, 36px);
  }
  .page-about .about-role {
    grid-template-columns: minmax(0, 1fr);
    border-top: 1px solid var(--hairline);
    border-bottom: 1px solid var(--hairline);
  }
  .page-about .about-role-num {
    grid-row: auto;
    margin-bottom: 10px;
  }
  .page-about .about-role .about-text {
    grid-column: 1;
  }
  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero-media img {
    aspect-ratio: 3 / 1;
  }
  .page-about .about-standard {
    padding-left: 22px;
  }
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-crumb .breadcrumb-link,
  .page-about .about-top-link,
  .page-about .about-hero-media img {
    transition: none;
  }
}