.page-about {
  background: var(--night-950);
  color: var(--mist-100);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: calc(var(--hdr-h) + clamp(34px, 6vw, 76px)) 0 clamp(44px, 7vw, 88px);
  background: linear-gradient(180deg, var(--dusk-700) 0%, var(--teal-700) 54%, var(--night-950) 100%);
}

.page-about .ab-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 64%;
  opacity: 0.32;
  filter: saturate(0.82) contrast(1.02);
}

.page-about .ab-hero__veil {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(180deg, rgba(59, 42, 94, 0.74) 0%, rgba(19, 76, 70, 0.60) 48%, var(--night-950) 100%);
}

.page-about .ab-hero__inner {
  position: relative;
  z-index: 2;
}

.page-about .ab-crumb {
  margin: 0 0 clamp(24px, 4vw, 46px);
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .ab-hero__title {
  margin: 0.25em 0 0;
  line-height: 1.1;
  text-shadow: 0 2px 24px rgba(5, 13, 14, 0.5);
}

.page-about .ab-hero__ver {
  color: var(--gold-500);
  letter-spacing: 0.04em;
}

.page-about .ab-hero__lead {
  margin-top: 22px;
  color: var(--teal-200);
  max-width: 58ch;
}

.page-about .ab-hero__panel {
  position: relative;
  padding: 22px 20px 22px 38px;
  border: 1px solid var(--glass-line);
  border-radius: var(--r-m);
  background: var(--glass);
  backdrop-filter: blur(9px);
  -webkit-backdrop-filter: blur(9px);
}

.page-about .ab-hero__vert {
  position: absolute;
  top: 20px;
  left: 11px;
  writing-mode: vertical-rl;
  color: var(--gold-500);
  font-size: 0.78rem;
  letter-spacing: 0.32em;
  opacity: 0.85;
  transition: color var(--dur-2) var(--ease);
}

.page-about .ab-hero__panel:hover .ab-hero__vert {
  color: var(--gold-200);
}

.page-about .ab-stats {
  margin: 0;
  display: grid;
  gap: 10px;
}

.page-about .ab-stats__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding-bottom: 9px;
  border-bottom: 1px dashed var(--line-soft);
}

.page-about .ab-stats__row:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .ab-stats dt {
  color: var(--stone-400);
  font-size: 0.9rem;
}

.page-about .ab-stats dd {
  margin: 0;
  color: var(--gold-200);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.04em;
}

/* ---------- 章节骨架 ---------- */
.page-about .ab-chapter {
  position: relative;
}

.page-about .ab-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .ab-rail {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .ab-rail__num {
  writing-mode: horizontal-tb;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.2em;
  color: var(--gold-500);
  transition: color var(--dur-2) var(--ease);
}

.page-about .ab-rail__meta {
  writing-mode: horizontal-tb;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--stone-400);
  transition: color var(--dur-2) var(--ease);
}

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

.page-about .ab-body > .pgt-h2:first-child {
  margin-top: 0;
}

.page-about .ab-copy p {
  margin: 0 0 1.15em;
  color: var(--mist-100);
  font-size: 1.05rem;
  line-height: 1.9;
  max-width: 68ch;
}

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

.page-about .ab-copy a {
  color: var(--gold-500);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color var(--dur-1) var(--ease);
}

.page-about .ab-copy a:hover,
.page-about .ab-copy a:focus-visible {
  color: var(--gold-200);
}

.page-about .ab-standfirst {
  margin: 18px 0 26px;
  padding-left: 18px;
  border-left: 2px solid var(--gold-500);
  color: var(--gold-200);
  font-size: clamp(1.1rem, 1.9vw, 1.32rem);
  line-height: 1.72;
  max-width: 40ch;
}

/* ---------- 叙事配图 ---------- */
.page-about .ab-figure {
  margin: 0;
  padding: clamp(28px, 5vw, 62px) 0;
}

.page-about .ab-figure__frame {
  border: 1px solid var(--line-soft);
  border-radius: var(--r-l);
  background: var(--solid-card);
  overflow: hidden;
  aspect-ratio: 4 / 3;
}

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

.page-about .ab-figure__cap {
  margin-top: 12px;
  color: var(--stone-400);
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 52ch;
}

/* ---------- 版本清单 ---------- */
.page-about .ab-ver {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
}

.page-about .ab-ver__item {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-top: 1px dashed var(--line-soft);
}

.page-about .ab-ver__item:last-child {
  border-bottom: 1px dashed var(--line-soft);
}

.page-about .ab-ver__tag {
  justify-self: start;
  align-self: start;
  margin-top: 2px;
}

.page-about .ab-ver__txt h3 {
  margin: 0 0 4px;
  font-size: 1.05rem;
  color: var(--mist-100);
}

.page-about .ab-ver__txt p {
  margin: 0;
  color: var(--stone-400);
  font-size: 0.94rem;
  line-height: 1.75;
}

.page-about .ab-verfig {
  margin: 26px 0 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-m);
  overflow: hidden;
  background: var(--solid-card);
}

.page-about .ab-verfig img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: contain;
}

/* ---------- 每周四件事 ---------- */
.page-about .ab-week {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .ab-week li {
  position: relative;
  padding: 18px 16px 20px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-m);
  background: var(--solid-card);
  transition: transform var(--dur-2) var(--ease), border-color var(--dur-2) var(--ease);
}

.page-about .ab-week li:hover {
  transform: translateY(-4px);
  border-color: var(--line-gold);
}

.page-about .ab-week__n {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--violet-500);
}

.page-about .ab-week h3 {
  margin: 0 0 6px;
  font-size: 1rem;
  color: var(--mist-100);
}

.page-about .ab-week p {
  margin: 0;
  color: var(--stone-400);
  font-size: 0.9rem;
  line-height: 1.72;
}

/* ---------- 团队分工 ---------- */
.page-about .ab-team {
  margin-top: 26px;
}

.page-about .ab-team__cell {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 18px;
}

.page-about .ab-team__num {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--gold-500);
}

.page-about .ab-team__role {
  margin: 0;
  font-size: 1.05rem;
  color: var(--gold-200);
}

.page-about .ab-team__desc {
  margin: 0;
  color: var(--stone-400);
  font-size: 0.92rem;
  line-height: 1.75;
}

.page-about .ab-note {
  margin: 22px 0 0;
  padding: 18px 20px;
  border-left: 2px solid var(--teal-500);
  border-radius: 0 var(--r-m) var(--r-m) 0;
  background: linear-gradient(135deg, rgba(31, 140, 121, 0.18), rgba(224, 174, 85, 0.10));
  color: var(--teal-200);
  font-size: 0.95rem;
  line-height: 1.82;
  max-width: 72ch;
}

/* ---------- 三关筛选 ---------- */
.page-about .ab-gates {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
}

.page-about .ab-gates li {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 20px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .ab-gates li:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .ab-gates h3 {
  margin: 0;
  font-size: 1.05rem;
  color: var(--gold-200);
}

.page-about .ab-gates p {
  margin: 0;
  color: var(--stone-400);
  font-size: 0.95rem;
  line-height: 1.8;
}

.page-about .ab-gates + .ab-copy {
  margin-top: 24px;
}

/* ---------- 联系方式 ---------- */
.page-about .ab-contact {
  margin: 24px 0 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-m);
  overflow: hidden;
  max-width: 620px;
}

.page-about .ab-contact__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 16px 20px;
  background: var(--solid-card);
}

.page-about .ab-contact dt {
  color: var(--stone-400);
  font-size: 0.9rem;
}

.page-about .ab-contact dd {
  margin: 0;
  color: var(--gold-200);
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: 0.04em;
  word-break: break-word;
}

.page-about .ab-scene {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .ab-scene li {
  display: grid;
  gap: 4px;
  padding-left: 16px;
  border-left: 2px solid var(--teal-500);
}

.page-about .ab-scene strong {
  color: var(--teal-200);
  font-size: 0.98rem;
}

.page-about .ab-scene span {
  color: var(--stone-400);
  font-size: 0.94rem;
  line-height: 1.75;
}

.page-about .ab-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin-top: 30px;
}

.page-about .ab-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 16px;
  border: 1px solid var(--line-gold);
  border-radius: 999px;
  color: var(--gold-200);
  font-size: 0.9rem;
  text-decoration: none;
  transition: background var(--dur-2) var(--ease), transform var(--dur-2) var(--ease);
}

.page-about .ab-links a:hover,
.page-about .ab-links a:focus-visible {
  background: rgba(224, 174, 85, 0.14);
  transform: translateY(-2px);
}

.page-about :focus-visible {
  outline: 2px solid var(--violet-500);
  outline-offset: 2px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-about .ab-contact__row {
    grid-template-columns: 132px minmax(0, 1fr);
    align-items: baseline;
    gap: 18px;
  }

  .page-about .ab-scene {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (min-width: 640px) {
  .page-about .ab-week {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-about .ab-grid {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: clamp(28px, 5vw, 64px);
  }

  .page-about .ab-rail {
    position: sticky;
    top: calc(var(--hdr-h-min) + 28px);
    align-self: start;
    flex-direction: column;
    align-items: flex-start;
    gap: 18px;
    padding: 0 0 0 16px;
    border-bottom: 0;
    border-left: 1px solid var(--line-soft);
  }

  .page-about .ab-rail__num,
  .page-about .ab-rail__meta {
    writing-mode: vertical-rl;
  }

  .page-about .ab-gates li {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 28px;
    align-items: start;
  }
}

@media (min-width: 1040px) {
  .page-about .ab-week {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .ab-figure__frame {
    aspect-ratio: 21 / 9;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-week li,
  .page-about .ab-links a,
  .page-about .ab-hero__vert {
    transition: none;
  }

  .page-about .ab-week li:hover,
  .page-about .ab-links a:hover {
    transform: none;
  }
}