.page-about {
  --ab-ink-soft: rgba(147, 170, 188, 0.22);
  --ab-gold-line: rgba(217, 179, 108, 0.34);
  --ab-paper-line: rgba(22, 32, 42, 0.14);
  background: var(--ps-ink);
  color: var(--ps-paper);
  font-family: var(--ps-body);
  overflow-x: hidden;
}

.page-about .ab-crumbbar {
  background: var(--ps-ink);
  padding: calc(var(--ps-gap) * 1.1) 0 calc(var(--ps-gap) * 0.3);
}

.page-about .ps-crumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--ps-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ps-mist);
}

.page-about .ps-crumbs__list li {
  display: inline-flex;
  align-items: center;
}

.page-about .ps-crumbs__list li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--ps-line);
}

.page-about .ps-crumbs__list a {
  color: var(--ps-mist);
  text-decoration: none;
  transition: color 0.2s ease;
}

.page-about .ps-crumbs__list a:hover,
.page-about .ps-crumbs__list a:focus-visible {
  color: var(--ps-gold);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: clamp(20px, 3.4vw, 44px) 0 clamp(48px, 7vw, 96px);
  background:
    radial-gradient(120% 85% at 92% 6%, rgba(46, 217, 180, 0.1), transparent 58%),
    radial-gradient(90% 70% at 4% 98%, rgba(217, 179, 108, 0.1), transparent 62%),
    var(--ps-ink);
}

.page-about .ab-hero__inner {
  display: grid;
  gap: clamp(30px, 5vw, 52px);
}

.page-about .ab-hero__text h1 {
  margin: 16px 0 0;
  font-family: var(--ps-head);
  font-weight: 900;
  font-size: clamp(30px, 6.2vw, 54px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--ps-paper);
}

.page-about .ps-kicker {
  display: inline-block;
  padding: 5px 10px;
  border: 1px solid var(--ab-gold-line);
  border-radius: var(--ps-r-sm);
  font-family: var(--ps-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--ps-gold);
}

.page-about .ab-hero__lede {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: clamp(15px, 2.1vw, 17px);
  line-height: 1.8;
  color: var(--ps-mist);
}

.page-about .ab-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 16px;
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-stat {
  padding-top: 10px;
  border-top: 1px solid var(--ps-line);
}

.page-about .ab-stat__value {
  font-family: var(--ps-mono);
  font-size: clamp(22px, 4vw, 30px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--ps-gold);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-stat__unit {
  margin-left: 4px;
  font-size: 12px;
  color: var(--ps-mist);
}

.page-about .ab-stat__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ps-mist);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.page-about .ab-hero__visual {
  position: relative;
  padding: clamp(16px, 3vw, 26px);
  border: 1px solid var(--ps-line);
  border-radius: var(--ps-r-md);
  background: linear-gradient(175deg, rgba(18, 50, 76, 0.82), rgba(6, 21, 35, 0.94));
  box-shadow: var(--ps-shadow);
  overflow: hidden;
}

.page-about .ab-hero__visual::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: linear-gradient(rgba(30, 74, 107, 0.28) 1px, transparent 1px);
  background-size: 100% 44px;
  opacity: 0.5;
}

.page-about .ab-hero__curve {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: auto;
}

.page-about .ab-hero__caption {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 14px 0 0;
  font-family: var(--ps-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--ps-mist);
}

.page-about .ab-hero__pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ps-orange);
  animation: abPulse 2s ease-in-out infinite;
}

@keyframes abPulse {
  0%,
  100% {
    opacity: 0.4;
    transform: scale(0.85);
  }
  50% {
    opacity: 1;
    transform: scale(1);
  }
}

/* ---------- 通用排版 ---------- */
.page-about .ab-h2 {
  margin: 0 0 18px;
  font-family: var(--ps-head);
  font-weight: 900;
  font-size: clamp(23px, 4.3vw, 34px);
  line-height: 1.24;
  letter-spacing: -0.015em;
}

.page-about .ab-h2--ink {
  color: var(--ps-paper-ink);
}

.page-about .ab-h2--paper {
  color: var(--ps-paper);
}

.page-about .ab-prose p {
  margin: 0 0 1.15em;
  max-width: 36em;
  font-size: clamp(15px, 1.9vw, 17px);
  line-height: 1.85;
  color: #3b4650;
}

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

.page-about .ab-prose--paper p {
  color: var(--ps-mist);
}

.page-about .ab-vnum {
  display: block;
  font-family: var(--ps-mono);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--ps-gold);
  writing-mode: horizontal-tb;
  margin-bottom: 12px;
}

/* ---------- 开篇 · 纸白 ---------- */
.page-about .ab-opening {
  position: relative;
  padding: var(--ps-section-y) 0;
  background: var(--ps-paper);
  color: var(--ps-paper-ink);
}

.page-about .ab-opening::before {
  content: "";
  position: absolute;
  top: -7px;
  left: 0;
  right: 0;
  height: 7px;
  background: var(--ps-ink-band);
  box-shadow: 0 2px 0 rgba(217, 179, 108, 0.3);
}

.page-about .ab-opening__inner {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
}

.page-about .ab-opening__figure {
  margin: 0;
}

.page-about .ab-opening__figure .ps-media {
  padding: 10px;
  background: #ece5d5;
  border: 1px solid var(--ab-paper-line);
  border-radius: var(--ps-r-sm);
  box-shadow: 8px 8px 0 rgba(22, 32, 42, 0.06);
}

.page-about .ab-opening__figure img,
.page-about .ab-cover__figure img,
.page-about .ab-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .ps-media__caption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  color: #6b7683;
}

/* ---------- 章节色带 + 时间线 ---------- */
.page-about .ab-bandsec {
  padding-bottom: var(--ps-section-y);
  background: var(--ps-ink-band);
}

.page-about .ab-bandhead {
  padding: clamp(38px, 5.4vw, 68px) 0 clamp(28px, 4vw, 42px);
  border-bottom: 1px solid var(--ps-line);
  background:
    linear-gradient(180deg, rgba(18, 50, 76, 0.65), transparent 70%),
    var(--ps-ink-band);
}

.page-about .ab-bandhead__idx {
  display: block;
  margin-bottom: 12px;
  font-family: var(--ps-mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  color: var(--ps-gold);
}

.page-about .ab-bandhead__quote {
  margin: 0;
  max-width: 40em;
  font-size: clamp(14px, 1.9vw, 16px);
  line-height: 1.8;
  color: var(--ps-mist);
}

.page-about .ab-flow {
  position: relative;
  margin-top: clamp(24px, 4vw, 42px);
  padding-left: 26px;
}

.page-about .ab-flow::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--ps-gold), var(--ps-line) 26%, var(--ps-line) 78%, transparent);
}

.page-about .ab-step {
  position: relative;
  border-bottom: 1px solid var(--ps-line);
}

.page-about .ab-step::before {
  content: "";
  position: absolute;
  left: -23px;
  top: 24px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ps-ink-band);
  border: 1.5px solid var(--ps-gold);
  transition: background 0.2s ease, box-shadow 0.2s ease;
}

.page-about .ab-step__sum {
  position: relative;
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 4px 16px;
  align-items: baseline;
  padding: 18px 30px 18px 0;
  cursor: pointer;
  list-style: none;
}

.page-about .ab-step__sum::-webkit-details-marker {
  display: none;
}

.page-about .ab-step__sum::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 15px;
  font-family: var(--ps-mono);
  font-size: 17px;
  line-height: 1;
  color: var(--ps-line);
  transition: color 0.2s ease;
}

.page-about .ab-step[open] .ab-step__sum::after {
  content: "\2212";
  color: var(--ps-gold);
}

.page-about .ab-step__sum:focus-visible {
  outline: 2px solid var(--ps-gold);
  outline-offset: 4px;
}

.page-about .ab-step__year {
  font-family: var(--ps-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ps-gold);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-step__title {
  font-family: var(--ps-head);
  font-size: clamp(15px, 2.1vw, 18px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--ps-paper);
  transition: color 0.2s ease;
}

.page-about .ab-step[open] .ab-step__title {
  color: var(--ps-gold-soft);
}

.page-about .ab-step[open]::before {
  background: var(--ps-gold);
  box-shadow: 0 0 0 4px rgba(217, 179, 108, 0.16);
}

.page-about .ab-step__body {
  padding: 0 0 20px;
}

.page-about .ab-step__body p {
  margin: 0;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ps-mist);
}

/* ---------- 覆盖范围 ---------- */
.page-about .ab-cover {
  padding: var(--ps-section-y) 0;
  background: var(--ps-ink);
}

.page-about .ab-cover__head {
  display: grid;
  gap: 16px;
}

.page-about .ab-dots {
  display: flex;
  align-items: flex-end;
  gap: clamp(4px, 1.2vw, 12px);
  margin-top: clamp(26px, 4vw, 40px);
  padding: 16px 4px 8px;
  border-top: 1px solid var(--ps-line);
  border-bottom: 1px solid var(--ps-line);
  overflow-x: auto;
}

.page-about .ab-dots__col {
  display: flex;
  flex: 0 0 auto;
  flex-direction: column-reverse;
  align-items: center;
  gap: 6px;
  padding: 10px 5px;
  border-radius: var(--ps-r-sm);
  transition: background 0.2s ease;
}

.page-about .ab-dots__col:hover,
.page-about .ab-dots__col:focus-within {
  background: rgba(46, 217, 180, 0.08);
}

.page-about .ab-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ps-line);
}

.page-about .ab-dots__col--cn .ab-dot {
  background: var(--ps-jade);
  opacity: 0.82;
}

.page-about .ab-dots__code {
  margin-top: 2px;
  font-family: var(--ps-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--ps-mist);
}

.page-about .ab-dots__legend {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--ps-mist);
}

.page-about .ab-dots__key {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ps-jade);
}

.page-about .ab-cover__figure {
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 10px;
  border: 1px solid var(--ps-line);
  border-radius: var(--ps-r-sm);
  background: var(--ps-ink-face);
}

.page-about .ab-cover__figure .ps-media__caption {
  color: var(--ps-mist);
}

/* ---------- 团队 ---------- */
.page-about .ab-team {
  padding: var(--ps-section-y) 0;
  background: var(--ps-paper);
  color: var(--ps-paper-ink);
}

.page-about .ab-team__inner {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

.page-about .ab-team__figure {
  margin: 0;
  padding: 10px;
  background: #ece5d5;
  border: 1px solid var(--ab-paper-line);
  border-radius: var(--ps-r-sm);
  box-shadow: 8px 8px 0 rgba(22, 32, 42, 0.06);
}

.page-about .ab-shift {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 4px;
  margin-top: 22px;
  max-width: 340px;
}

.page-about .ab-shift__cell {
  aspect-ratio: 1 / 1;
  border-radius: 2px;
  background: rgba(22, 32, 42, 0.09);
  border: 1px solid rgba(22, 32, 42, 0.06);
}

.page-about .ab-shift__cell--live {
  background: var(--ps-orange);
  border-color: var(--ps-orange);
  opacity: 0.92;
}

.page-about .ab-shift__note {
  margin: 12px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: #6b7683;
}

/* ---------- 合作 ---------- */
.page-about .ab-partners {
  padding: var(--ps-section-y) 0;
  background: var(--ps-ink-band);
}

.page-about .ab-partners__lede {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ps-mist);
}

.page-about .ab-partners__list {
  display: grid;
  gap: 14px;
}

.page-about .ab-partner {
  position: relative;
  padding: 18px 18px 18px 20px;
  border: 1px solid var(--ps-line);
  border-left: 2px solid var(--ps-gold);
  border-radius: var(--ps-r-sm);
  background: var(--ps-ink-face);
}

.page-about .ab-partner__num {
  display: block;
  font-family: var(--ps-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--ps-gold);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-partner__title {
  margin: 10px 0 8px;
  font-family: var(--ps-head);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--ps-paper);
}

.page-about .ab-partner__body {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ps-mist);
}

/* ---------- 收口 ---------- */
.page-about .ab-closing {
  padding: var(--ps-section-y) 0 calc(var(--ps-section-y) * 0.8);
  background:
    radial-gradient(110% 80% at 88% 0%, rgba(46, 217, 180, 0.09), transparent 60%),
    var(--ps-ink);
}

.page-about .ab-gains {
  display: grid;
  gap: 14px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-gain {
  padding: 16px 0 0;
  border-top: 1px solid var(--ps-line);
}

.page-about .ab-gain__idx {
  display: block;
  font-family: var(--ps-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--ps-gold);
}

.page-about .ab-gain__title {
  margin: 8px 0 6px;
  font-family: var(--ps-head);
  font-size: 17px;
  font-weight: 700;
  color: var(--ps-paper);
}

.page-about .ab-gain p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ps-mist);
}

.page-about .ab-closing__foot {
  margin-top: clamp(30px, 4vw, 46px);
  padding-top: 24px;
  border-top: 1px solid var(--ps-line);
}

.page-about .ab-closing__note {
  margin: 0 0 20px;
  max-width: 40em;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ps-gold-soft);
}

.page-about .ab-closing__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 断点 ---------- */
@media (min-width: 560px) {
  .page-about .ab-hero__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .ab-hero__inner {
    grid-template-columns: minmax(0, 4.4fr) minmax(0, 7.6fr);
    align-items: start;
  }

  .page-about .ab-hero__text {
    padding-top: 8px;
  }

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

  .page-about .ab-opening__figure .ps-media {
    margin-top: 6px;
  }

  .page-about .ab-cover__head {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
  }

  .page-about .ab-cover__head .ab-vnum {
    writing-mode: vertical-rl;
    margin: 0;
    letter-spacing: 0.3em;
  }

  .page-about .ab-team__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-about .ab-opening__text {
    display: grid;
    grid-template-columns: 24px minmax(0, 1fr);
    gap: 20px;
  }

  .page-about .ab-opening__text .ab-vnum,
  .page-about .ab-team__text .ab-vnum {
    writing-mode: vertical-rl;
    letter-spacing: 0.3em;
    margin: 4px 0 0;
  }

  .page-about .ab-team__text {
    display: grid;
    grid-template-columns: 24px minmax(0, 1fr);
    gap: 20px;
  }

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

@media (min-width: 1100px) {
  .page-about .ab-flow {
    padding-left: 40px;
  }

  .page-about .ab-flow::before {
    left: 9px;
  }

  .page-about .ab-step::before {
    left: -35px;
  }

  .page-about .ab-step__sum {
    grid-template-columns: 78px minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-hero__pulse {
    animation: none;
    opacity: 1;
  }

  .page-about .ab-step::before,
  .page-about .ab-step__sum::after,
  .page-about .ab-dots__col {
    transition: none;
  }
}
<<<END>>>