.page-about {
  font-family: var(--font-body);
  color: var(--snow);
  overflow-x: clip;
}

/* ---------- 通用排版件 ---------- */
.page-about .ab-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--orange);
  margin: 0;
  transform: skewX(-4deg);
  transform-origin: left bottom;
}

.page-about .ab-h2 {
  font-family: var(--font-display);
  font-size: clamp(25px, 4vw, 42px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -.01em;
  margin: 10px 0 0;
  transform: skewX(-2deg);
  transform-origin: left bottom;
}

.page-about .ab-sub {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--on-dark-soft);
}

.page-about .ab-head {
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-about .ab-head .index-label {
  color: var(--orange);
}

.page-about .ab-head--dark .ab-h2 {
  color: var(--charcoal);
}

.page-about .ab-head--dark .ab-sub {
  color: rgba(18, 24, 32, .76);
}

.page-about .ab-section {
  padding: clamp(46px, 7vw, 92px) 0;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: clamp(20px, 3.4vw, 34px) 0 clamp(38px, 6vw, 76px);
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(242, 107, 42, .26), transparent 58%),
    linear-gradient(180deg, var(--ink-deep), var(--ink));
  border-bottom: 1px solid var(--line);
}

.page-about .ab-hero__grid {
  display: grid;
  gap: clamp(22px, 4vw, 44px);
  margin-top: clamp(16px, 3vw, 30px);
}

.page-about .ab-hero__title {
  font-family: var(--font-display);
  font-size: clamp(34px, 6.6vw, 64px);
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: -.02em;
  margin: 14px 0 0;
  transform: skewX(-2.5deg);
  transform-origin: left bottom;
}

.page-about .ab-hero__lede {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--on-dark-soft);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .ab-hero__figure {
  margin: 0;
  position: relative;
  clip-path: polygon(0 0, 100% 5%, 100% 100%, 0 95%);
  border: 1px solid var(--line-strong);
  background: var(--glass);
  box-shadow: var(--shadow-glass);
}

.page-about .ab-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .ab-hero__caption {
  position: absolute;
  left: 14px;
  bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--snow);
  background: rgba(11, 27, 43, .7);
  padding: 4px 9px;
  border-left: 2px solid var(--orange);
}

/* ---------- 规模数据带 ---------- */
.page-about .ab-band {
  background: var(--ink-deep);
  border-top: 3px solid var(--orange);
  border-bottom: 1px solid var(--line);
}

.page-about .ab-band__grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
}

.page-about .ab-band__cell {
  background: var(--ink-deep);
  padding: 18px clamp(12px, 2.2vw, 24px);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .ab-band__num {
  font-family: var(--font-mono);
  font-size: clamp(24px, 4.4vw, 36px);
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--amber);
  line-height: 1.1;
}

.page-about .ab-band__label {
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--mist);
}

/* ---------- 时间轴 ---------- */
.page-about .ab-timeline {
  background:
    linear-gradient(180deg, rgba(30, 58, 79, .28), transparent 60%),
    var(--ink);
}

.page-about .ab-timeline__layout {
  display: grid;
  gap: clamp(20px, 3vw, 38px);
}

.page-about .ab-rail__title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--on-dark-faint);
  margin: 0 0 10px;
}

.page-about .ab-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .ab-rail__list a {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--on-dark-soft);
  text-decoration: none;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(30, 58, 79, .55);
  transition: color .2s ease, border-color .2s ease, background .2s ease;
}

.page-about .ab-rail__list a:hover,
.page-about .ab-rail__list a:focus-visible {
  color: var(--snow);
  border-color: var(--orange);
  background: rgba(242, 107, 42, .18);
}

.page-about .ab-track {
  --ab-pad: clamp(18px, 3vw, 34px);
  list-style: none;
  margin: 0;
  padding: 0 0 0 var(--ab-pad);
  border-left: 1px solid var(--line-strong);
  display: grid;
  gap: clamp(14px, 2.4vw, 24px);
}

.page-about .ab-track__item {
  position: relative;
}

.page-about .ab-track__item::before {
  content: "";
  position: absolute;
  left: calc(var(--ab-pad) * -1 - 5px);
  top: 26px;
  width: 9px;
  height: 9px;
  background: var(--orange);
  transform: rotate(45deg);
}

.page-about .ab-stage {
  background: linear-gradient(145deg, rgba(30, 58, 79, .9), rgba(11, 27, 43, .92));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(16px, 2.6vw, 26px);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-about .ab-stage__top {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.page-about .ab-year {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.4vw, 30px);
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--amber);
  line-height: 1;
}

.page-about .ab-stage__title {
  font-family: var(--font-display);
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 700;
  letter-spacing: -.005em;
  margin: 12px 0 8px;
  color: var(--snow);
}

.page-about .ab-stage__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--on-dark-soft);
}

.page-about .ab-stage__more {
  margin-top: 14px;
  border-top: 1px dashed var(--line);
  padding-top: 10px;
}

.page-about .ab-stage__more summary {
  cursor: pointer;
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--orange);
  padding: 2px 0;
}

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

.page-about .ab-stage__more summary::before {
  content: "+";
  display: inline-block;
  width: 16px;
  height: 16px;
  line-height: 15px;
  text-align: center;
  border: 1px solid currentColor;
  border-radius: 3px;
  font-size: 12px;
}

.page-about .ab-stage__more[open] summary::before {
  content: "−";
}

.page-about .ab-stage__more ul {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: grid;
  gap: 6px;
}

.page-about .ab-stage__more li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--on-dark-soft);
}

.page-about .ab-stage__more li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  background: var(--green);
  transform: rotate(45deg);
}

/* ---------- 内容体系 Bento ---------- */
.page-about .ab-system {
  background: var(--snow);
  color: var(--charcoal);
}

.page-about .ab-bento {
  display: grid;
  gap: clamp(12px, 2vw, 18px);
  grid-template-columns: 1fr;
}

.page-about .ab-bento__cell {
  background: var(--ink);
  color: var(--snow);
  border: 1px solid rgba(18, 24, 32, .12);
  border-radius: var(--radius-sm);
  padding: clamp(16px, 2.4vw, 26px);
  position: relative;
}

.page-about .ab-bento__cell--amber {
  background: var(--amber-soft);
  color: var(--charcoal);
  border-color: rgba(255, 176, 32, .6);
}

.page-about .ab-bento__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--orange);
  margin: 0 0 10px;
}

.page-about .ab-bento__cell--amber .ab-bento__idx {
  color: #A8630A;
}

.page-about .ab-bento__cell h3 {
  font-family: var(--font-display);
  font-size: clamp(18px, 2.3vw, 23px);
  font-weight: 700;
  line-height: 1.25;
  margin: 0 0 10px;
}

.page-about .ab-bento__cell p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--on-dark-soft);
}

.page-about .ab-bento__cell--amber p {
  color: rgba(18, 24, 32, .8);
}

.page-about .ab-bento__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 7px;
}

.page-about .ab-bento__list li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--on-dark-soft);
}

.page-about .ab-bento__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  background: var(--orange);
}

.page-about .ab-bento__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.page-about .ab-chip {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  padding: 5px 11px;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  color: var(--amber);
  background: rgba(255, 176, 32, .1);
}

/* ---------- 团队与复核 ---------- */
.page-about .ab-team {
  background:
    radial-gradient(90% 70% at 10% 0%, rgba(107, 143, 94, .16), transparent 60%),
    var(--ink);
}

.page-about .ab-team__grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .ab-flow {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .ab-flow__step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--green);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(30, 58, 79, .48);
}

.page-about .ab-flow__num {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--green);
  letter-spacing: .04em;
  padding-top: 2px;
}

.page-about .ab-flow__step h3 {
  font-size: 15.5px;
  font-weight: 700;
  margin: 0 0 5px;
  color: var(--snow);
}

.page-about .ab-flow__step p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--on-dark-soft);
}

.page-about .ab-team__note {
  margin: 20px 0 0;
  padding: 14px 16px;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--on-dark-soft);
  background: rgba(255, 176, 32, .08);
  border-left: 2px solid var(--amber);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.page-about .ab-team__figure {
  margin: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--glass);
  box-shadow: var(--shadow-glass);
}

.page-about .ab-team__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-about .ab-team__figure figcaption {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--mist);
  padding: 10px 14px;
  border-top: 1px solid var(--line);
}

/* ---------- 合作生态 ---------- */
.page-about .ab-eco {
  background: linear-gradient(160deg, var(--slate), var(--ink-deep));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .ab-eco__grid {
  display: grid;
  gap: clamp(22px, 4vw, 40px);
}

.page-about .ab-eco__net {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(11, 27, 43, .55);
  padding: clamp(14px, 2.4vw, 24px);
}

.page-about .ab-net {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

.page-about .ab-net__lines line {
  stroke: rgba(143, 163, 176, .42);
  stroke-width: 1;
}

.page-about .ab-net__nodes circle {
  fill: var(--green);
  opacity: .9;
}

.page-about .ab-net__core {
  fill: var(--orange);
}

.page-about .ab-net__ring {
  fill: none;
  stroke: rgba(255, 176, 32, .55);
  stroke-width: 1.5;
  stroke-dasharray: 5 6;
}

.page-about .ab-eco__legend {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 12.5px;
  color: var(--on-dark-soft);
}

.page-about .ab-eco__legend li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.page-about .ab-dot {
  width: 8px;
  height: 8px;
  transform: rotate(45deg);
  display: inline-block;
}

.page-about .ab-dot--orange { background: var(--orange); }
.page-about .ab-dot--amber { background: var(--amber); }
.page-about .ab-dot--green { background: var(--green); }

.page-about .ab-eco__figure {
  margin: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.page-about .ab-eco__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .ab-eco__stats {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .ab-eco__stats li {
  background: rgba(11, 27, 43, .8);
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 16px;
  font-size: 13.5px;
  color: var(--on-dark-soft);
}

.page-about .ab-eco__num {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  color: var(--amber);
  line-height: 1;
}

.page-about .ab-eco__honor {
  margin: 16px 0 0;
  padding: 12px 16px;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--snow);
  background: rgba(242, 107, 42, .14);
  border-left: 2px solid var(--orange);
}

/* ---------- 资料库厚度 ---------- */
.page-about .ab-depth-section {
  background:
    radial-gradient(80% 60% at 80% 100%, rgba(255, 176, 32, .12), transparent 65%),
    var(--ink);
}

.page-about .ab-depth {
  display: grid;
  gap: clamp(24px, 3.4vw, 40px);
}

.page-about .ab-depth__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(56px, 12vw, 104px);
  font-weight: 700;
  line-height: .95;
  letter-spacing: -.03em;
  color: var(--amber);
  margin-top: 8px;
}

.page-about .ab-depth__num small {
  font-size: .22em;
  letter-spacing: .04em;
  color: var(--snow);
  margin-left: 10px;
  font-weight: 400;
}

.page-about .ab-depth__text {
  margin: 16px 0 0;
  max-width: 42ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--on-dark-soft);
}

.page-about .ab-depth__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--on-dark-faint);
  margin: 0 0 10px;
}

.page-about .ab-seasons {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 6px;
}

.page-about .ab-season {
  display: block;
  text-align: center;
  padding: 12px 4px;
  border: 1px solid var(--line);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .04em;
  color: var(--mist);
  background: rgba(38, 63, 74, .55);
}

.page-about .ab-season--current {
  border-color: var(--amber);
  background: rgba(255, 176, 32, .16);
  color: var(--amber);
  font-weight: 700;
}

.page-about .ab-pace {
  margin: 20px 0 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .ab-pace__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 14px;
  padding: 12px 16px;
  background: rgba(11, 27, 43, .85);
}

.page-about .ab-pace dt {
  font-size: 13px;
  color: var(--on-dark-soft);
}

.page-about .ab-pace__val {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--snow);
  text-align: right;
  margin: 0;
}

/* ---------- 下一步 ---------- */
.page-about .ab-next {
  background: linear-gradient(180deg, var(--ink), var(--ink-deep));
  border-top: 3px solid var(--orange);
}

.page-about .ab-next__grid {
  display: grid;
  gap: clamp(12px, 2vw, 18px);
}

.page-about .ab-next__card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  text-decoration: none;
  color: var(--snow);
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(30, 58, 79, .45);
  transition: border-color .22s ease, background .22s ease, transform .22s ease;
}

.page-about .ab-next__card:hover,
.page-about .ab-next__card:focus-visible {
  border-color: var(--orange);
  background: rgba(30, 58, 79, .8);
  transform: translateY(-3px);
}

.page-about .ab-next__idx {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-about .ab-next__card h3 {
  font-family: var(--font-display);
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 700;
  line-height: 1.28;
  margin: 0;
}

.page-about .ab-next__card p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--on-dark-soft);
}

.page-about .ab-next__go {
  margin-top: auto;
  padding-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--orange);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .ab-band__grid {
    grid-template-columns: repeat(4, 1fr);
  }

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

  .page-about .ab-bento__cell--d {
    grid-column: 1 / -1;
  }

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

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: 1.08fr 0.92fr;
    align-items: end;
  }

  .page-about .ab-team__grid {
    grid-template-columns: 1fr 0.82fr;
    align-items: start;
  }

  .page-about .ab-eco__grid {
    grid-template-columns: 1fr 0.95fr;
    align-items: start;
  }

  .page-about .ab-depth {
    grid-template-columns: 0.85fr 1.15fr;
    align-items: center;
  }

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

@media (min-width: 960px) {
  .page-about .ab-timeline__layout {
    grid-template-columns: 176px minmax(0, 1fr);
    align-items: start;
    gap: clamp(28px, 4vw, 48px);
  }

  .page-about .ab-rail {
    position: sticky;
    top: 104px;
  }

  .page-about .ab-rail__list {
    flex-direction: column;
    gap: 6px;
  }

  .page-about .ab-rail__list a {
    border-radius: 4px;
    border-left: 2px solid var(--line-strong);
    border-top-color: transparent;
    border-right-color: transparent;
    border-bottom-color: transparent;
    background: transparent;
    padding: 7px 10px;
  }

  .page-about .ab-rail__list a:hover,
  .page-about .ab-rail__list a:focus-visible {
    border-left-color: var(--orange);
    background: rgba(242, 107, 42, .12);
  }
}

@media (min-width: 1040px) {
  .page-about .ab-bento {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-about .ab-bento__cell--a { grid-column: span 6; }
  .page-about .ab-bento__cell--b { grid-column: span 3; }
  .page-about .ab-bento__cell--c { grid-column: span 3; }
  .page-about .ab-bento__cell--d { grid-column: span 12; }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-next__card {
    transition: none;
  }

  .page-about .ab-next__card:hover,
  .page-about .ab-next__card:focus-visible {
    transform: none;
  }
}
<<<END>>>