.page-about {
  --ca-pad: clamp(16px, 3.2vw, 44px);
  --ca-gap: clamp(20px, 3vw, 44px);
  position: relative;
  color: var(--cream);
  background-color: var(--deep);
  background-image:
    radial-gradient(880px 520px at 92% -6%, var(--neon-08), transparent 66%),
    radial-gradient(700px 460px at -8% 42%, var(--gold-16), transparent 70%);
  background-repeat: no-repeat;
  overflow-x: hidden;
}

/* ---------- 档案夹骨架 ---------- */
.page-about .dossier {
  max-width: 1368px;
  margin-inline: auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .dossier-body {
  min-width: 0;
}

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

/* ---------- 首屏 ---------- */
.page-about .dossier-hero {
  padding: clamp(26px, 4.6vw, 52px) var(--ca-pad) clamp(30px, 4.4vw, 56px);
  border-bottom: 2px solid var(--line);
  position: relative;
}

.page-about .dossier-hero::after {
  content: "";
  position: absolute;
  left: var(--ca-pad);
  right: var(--ca-pad);
  bottom: -2px;
  height: 2px;
  background: linear-gradient(90deg, var(--neon), transparent 42%);
  opacity: .7;
}

.page-about .dossier-hero__eyebrow {
  margin: 16px 0 0;
  color: var(--gold);
}

.page-about .dossier-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 6.2vw, 74px);
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin: 12px 0 0;
  max-width: 17ch;
}

.page-about .hl {
  color: var(--neon);
  text-shadow: 0 0 26px var(--neon-30);
}

.page-about .dossier-hero__lead {
  max-width: 56ch;
  margin: 20px 0 0;
  color: var(--mist);
}

/* ---------- 数字条 ---------- */
.page-about .stat-row {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
}

.page-about .stat {
  background: var(--panel-2);
  padding: 16px 14px;
  min-width: 0;
}

.page-about .stat:nth-child(5) {
  grid-column: span 2;
}

.page-about .stat__num {
  display: block;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 4.2vw, 40px);
  line-height: 1;
  color: var(--gold);
  letter-spacing: .01em;
}

.page-about .stat__unit {
  font-size: .46em;
  margin-left: 4px;
  color: var(--mist);
}

.page-about .stat__label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mist);
}

/* ---------- 区块通用 ---------- */
.page-about .dossier-sec {
  padding: clamp(46px, 6.2vw, 86px) var(--ca-pad);
  border-bottom: var(--line-soft);
  position: relative;
}

.page-about .dossier-sec--last {
  border-bottom: 0;
}

.page-about .dossier-sec__lead {
  max-width: 52ch;
  color: var(--mist);
  margin-top: 4px;
}

.page-about .split {
  display: grid;
  gap: var(--ca-gap);
  margin-top: 26px;
}

.page-about .split__text {
  min-width: 0;
}

.page-about .split__text > p {
  margin: 0 0 14px;
  max-width: 46ch;
}

.page-about .split__media {
  min-width: 0;
}

/* ---------- 通用图文容器 ---------- */
.page-about .figure {
  position: relative;
  margin: 0;
  border: 2px solid var(--line);
  background: linear-gradient(140deg, var(--panel), var(--deep-2));
  box-shadow: var(--shadow-hard);
  overflow: hidden;
  aspect-ratio: 4 / 3;
}

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

.page-about .figure::after {
  content: "";
  position: absolute;
  right: 12px;
  bottom: 12px;
  width: 34px;
  height: 34px;
  border-right: 2px solid var(--neon);
  border-bottom: 2px solid var(--neon);
  opacity: .55;
  pointer-events: none;
}

.page-about .figure--team {
  aspect-ratio: 4 / 3;
}

.page-about .figure--flow {
  aspect-ratio: 12 / 7;
}

.page-about .figure--wide {
  aspect-ratio: 16 / 6;
  margin-top: 26px;
}

/* ---------- 岗位矩阵 ---------- */
.page-about .role-grid {
  list-style: none;
  margin: 22px 0 16px;
  padding: 0;
  display: grid;
  gap: 12px;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .role {
  border: 2px solid var(--line);
  background: linear-gradient(160deg, var(--panel), var(--panel-2));
  box-shadow: 4px 4px 0 0 rgba(3, 19, 31, .85);
  padding: 16px;
  min-width: 0;
}

.page-about .role__head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 8px;
}

.page-about .role__num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 34px;
  line-height: 1;
  color: var(--neon);
}

.page-about .role__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--cream);
}

.page-about .role__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 编审流程 ---------- */
.page-about .steps {
  list-style: none;
  counter-reset: ca-step;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .step {
  position: relative;
  padding: 16px 16px 16px 66px;
  border: 2px solid var(--line);
  border-left: 6px solid var(--neon);
  background: linear-gradient(100deg, var(--panel) 0%, var(--panel-2) 100%);
  min-width: 0;
}

.page-about .step__num {
  position: absolute;
  left: 16px;
  top: 15px;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 28px;
  line-height: 1;
  color: var(--gold);
}

.page-about .step__title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--cream);
}

.page-about .step__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .tl-item {
  display: grid;
  gap: 4px;
  padding: 18px 18px 18px 20px;
  border: 2px solid var(--line);
  border-left-width: 6px;
  border-left-color: var(--neon);
  background: linear-gradient(100deg, var(--panel) 0%, var(--panel-2) 100%);
  box-shadow: 4px 4px 0 0 rgba(3, 19, 31, .85);
  min-width: 0;
  transition: transform var(--dur) var(--ease), border-left-color var(--dur) var(--ease);
}

.page-about .tl-item:nth-child(2) { border-left-color: var(--gold); }
.page-about .tl-item:nth-child(3) { border-left-color: var(--moss); }
.page-about .tl-item:nth-child(4) { border-left-color: var(--clay); }
.page-about .tl-item:nth-child(5) { border-left-color: var(--coral); }

.page-about .tl-item__year {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1;
  color: var(--gold);
  letter-spacing: .02em;
}

.page-about .tl-item__title {
  margin: 6px 0 6px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  color: var(--cream);
}

.page-about .tl-item__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
  max-width: 62ch;
}

/* ---------- 合作方 ---------- */
.page-about .partner-grid {
  margin-top: 24px;
}

.page-about .partner {
  min-width: 0;
  border-color: var(--line);
  background: linear-gradient(160deg, var(--panel), var(--panel-2));
}

.page-about .partner .card__index {
  color: var(--neon);
  letter-spacing: .08em;
}

.page-about .partner-note {
  margin: 20px 0 0;
  max-width: 60ch;
  padding-left: 14px;
  border-left: 3px solid var(--gold);
}

/* ---------- 去向卡片 ---------- */
.page-about .next-grid {
  margin-top: 24px;
  display: grid;
  gap: 12px;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .next-card {
  display: block;
  position: relative;
  padding: 20px 20px 22px;
  border: 2px solid var(--line);
  background: linear-gradient(150deg, var(--panel-2), var(--deep-2));
  box-shadow: 4px 4px 0 0 rgba(3, 19, 31, .85);
  color: inherit;
  text-decoration: none;
  min-width: 0;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .next-card:hover,
.page-about .next-card:focus-visible {
  border-color: var(--neon);
  transform: translate(-2px, -2px);
}

.page-about .next-card__num {
  display: block;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 26px;
  line-height: 1;
  color: var(--neon);
}

.page-about .next-card__title {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  color: var(--cream);
}

.page-about .next-card__text {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .next-card__go {
  display: inline-block;
  font-size: 13px;
  letter-spacing: .08em;
  font-weight: 700;
  color: var(--gold);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .stat-row {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .stat:nth-child(5) {
    grid-column: auto;
  }

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

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

  .page-about .timeline {
    gap: 14px;
  }
}

@media (min-width: 900px) {
  .page-about .split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
  }

  .page-about .split--flip {
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
  }

  .page-about .split--flip .split__media {
    grid-column: 1;
    grid-row: 1;
  }

  .page-about .split--flip .split__text {
    grid-column: 2;
    grid-row: 1;
  }

  .page-about .tl-item {
    grid-template-columns: 168px minmax(0, 1fr);
    align-items: baseline;
    column-gap: 20px;
    padding: 20px 22px;
  }

  .page-about .tl-item__year {
    grid-row: 1 / span 2;
  }

  .page-about .tl-item__title {
    margin-top: 0;
  }

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

@media (min-width: 1024px) {
  .page-about .dossier {
    grid-template-columns: 88px minmax(0, 1fr);
  }

  .page-about .dossier-rail {
    display: block;
    border-right: 2px solid var(--line);
    background: linear-gradient(180deg, var(--deep-2), var(--deep));
  }

  .page-about .dossier-rail__list {
    list-style: none;
    margin: 0;
    padding: clamp(30px, 4.6vw, 56px) 0 clamp(30px, 4.6vw, 56px) 10px;
    display: grid;
    gap: 6px;
    position: sticky;
    top: calc(var(--bar-h) + 28px);
  }

  .page-about .dossier-rail__link {
    display: block;
    padding: 9px 8px;
    border-left: 3px solid transparent;
    color: var(--mist);
    text-decoration: none;
    transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
  }

  .page-about .dossier-rail__link:hover,
  .page-about .dossier-rail__link:focus-visible {
    color: var(--neon);
    border-left-color: var(--neon);
    background: var(--neon-08);
    outline: none;
  }

  .page-about .dossier-rail__num {
    display: block;
    font-family: var(--font-num);
    font-variant-numeric: tabular-nums;
    font-size: 20px;
    line-height: 1.1;
    color: var(--gold);
  }

  .page-about .dossier-rail__label {
    display: block;
    margin-top: 2px;
    font-size: 12px;
    letter-spacing: .08em;
  }

  .page-about .dossier-hero__title {
    max-width: 18ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-item,
  .page-about .next-card,
  .page-about .dossier-rail__link {
    transition: none;
  }

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