.page-about {
  --ab-rail: 76px;
  --ab-note: 200px;
  --ab-gap: clamp(16px, 2.4vw, 34px);
  --ab-hair: rgba(200, 214, 226, .16);
  --ab-soft: rgba(30, 53, 80, .55);
  --ab-gold-ink: #8a6413;
  background: var(--c-ink);
  color: var(--c-ondark);
  overflow-x: clip;
}

.page-about .container {
  width: 100%;
  max-width: calc(var(--maxw) + 2 * clamp(18px, 4vw, 40px));
  margin-inline: auto;
  padding-inline: clamp(18px, 4vw, 40px);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  padding-block: 18px 2px;
}
.page-about .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .06em;
  color: rgba(200, 214, 226, .55);
}
.page-about .breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  margin-right: 8px;
  color: rgba(216, 165, 65, .6);
}
.page-about .breadcrumbs__item a {
  color: rgba(200, 214, 226, .7);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.page-about .breadcrumbs__item a:hover,
.page-about .breadcrumbs__item a:focus-visible {
  color: var(--c-gold);
  border-bottom-color: var(--c-gold);
}
.page-about .breadcrumbs__item[aria-current="page"] {
  color: var(--c-gold);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  isolation: isolate;
  padding-block: clamp(26px, 4.6vw, 58px) clamp(46px, 7.5vw, 96px);
  background:
    radial-gradient(120% 100% at 92% 0%, rgba(20, 69, 110, .92) 0%, rgba(20, 69, 110, 0) 58%),
    linear-gradient(172deg, #0d2035 0%, var(--c-ink) 64%);
  border-bottom: 1px solid var(--ab-hair);
}
.page-about .ab-hero::after {
  content: "";
  position: absolute;
  right: -4%;
  top: -18%;
  width: 44%;
  aspect-ratio: 1 / 1;
  background: linear-gradient(140deg, rgba(216, 165, 65, .18), rgba(242, 106, 75, .06) 55%, transparent 78%);
  clip-path: polygon(100% 0, 100% 100%, 0 0);
  pointer-events: none;
  z-index: -1;
}

.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 46px);
  align-items: end;
}

.page-about .ab-hero .eyebrow {
  display: inline-block;
  margin: 0;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--c-gold);
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(216, 165, 65, .45);
}

.page-about .ab-hero h1 {
  margin: 18px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(36px, 5.6vw, 72px);
  line-height: 1.03;
  letter-spacing: -.026em;
  color: var(--c-head);
}

.page-about .ab-hero__lede {
  max-width: 34em;
  margin: 22px 0 0;
  font-size: 17px;
  line-height: 1.82;
  color: rgba(200, 214, 226, .82);
}

.page-about .ab-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 34px;
  margin-top: 30px;
  padding-top: 22px;
  border-top: 1px solid var(--ab-hair);
}
.page-about .ab-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.page-about .ab-stat__v {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 3vw, 34px);
  line-height: 1;
  color: var(--c-gold);
  letter-spacing: -.01em;
}
.page-about .ab-stat__k {
  font-size: 13px;
  letter-spacing: .04em;
  color: rgba(200, 214, 226, .6);
}

.page-about .ab-hero__media {
  position: relative;
  margin: 0;
  clip-path: polygon(0 5%, 100% 0, 100% 95%, 0 100%);
}
.page-about .ab-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  filter: grayscale(.18) contrast(1.06);
}
.page-about .ab-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(180deg, rgba(11, 27, 43, .34) 0 1px, transparent 1px 5px);
  pointer-events: none;
}

/* ---------- 时间轴骨架 ---------- */
.page-about .ab-track {
  position: relative;
  padding-block: clamp(30px, 5vw, 66px);
}

.page-about .ab-node {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  padding-block: clamp(28px, 4.4vw, 54px);
}
.page-about .ab-node + .ab-node {
  border-top: 1px solid var(--ab-hair);
}

.page-about .ab-node__mark {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--c-gold);
}
.page-about .ab-node__dot {
  flex: none;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--c-gold);
  box-shadow: 0 0 0 4px rgba(216, 165, 65, .14);
}
.page-about .ab-node__year {
  white-space: nowrap;
}

.page-about .ab-node__body h2 {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(24px, 3vw, 38px);
  line-height: 1.1;
  letter-spacing: -.022em;
  color: var(--c-head);
}
.page-about .ab-node__body > p {
  max-width: 38em;
  margin: 0 0 14px;
  font-size: 17px;
  line-height: 1.82;
  color: rgba(200, 214, 226, .8);
}
.page-about .ab-node__body > p:last-of-type {
  margin-bottom: 0;
}

.page-about .ab-node__note {
  display: grid;
  gap: 10px;
}
.page-about .ab-note {
  margin: 0;
  padding: 10px 12px;
  font-family: var(--font-data);
  font-size: 12px;
  line-height: 1.65;
  letter-spacing: .02em;
  color: rgba(200, 214, 226, .66);
  background: var(--ab-soft);
  border-left: 1px solid rgba(216, 165, 65, .55);
}
.page-about .ab-note__k {
  display: block;
  margin-bottom: 4px;
  color: var(--c-gold);
  letter-spacing: .14em;
}

/* ---------- 图形容器 ---------- */
.page-about .ab-figure {
  margin: clamp(20px, 3vw, 30px) 0 0;
}
.page-about .ab-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .ab-figure--wide img {
  aspect-ratio: 16 / 7;
  filter: grayscale(.3) brightness(.92);
}
.page-about .ab-figure--tall img {
  aspect-ratio: 4 / 5;
  filter: grayscale(.35) contrast(1.08);
}
.page-about .ab-figure .media__cap {
  display: block;
  margin-top: 10px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .04em;
  color: rgba(200, 214, 226, .55);
}

/* ---------- 五道工序 ---------- */
.page-about .ab-steps {
  margin-top: 22px;
  border-top: 1px solid var(--ab-hair);
  background: linear-gradient(180deg, rgba(30, 53, 80, .45), rgba(30, 53, 80, 0));
}
.page-about .ab-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 2px 16px;
  padding: 16px 14px 16px 14px;
  border-bottom: 1px solid var(--ab-hair);
  border-left: 2px solid transparent;
  outline: none;
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}
.page-about .ab-step:hover,
.page-about .ab-step:focus-visible {
  border-left-color: var(--c-gold);
  background: rgba(11, 27, 43, .5);
}
.page-about .ab-step__no {
  grid-row: 1 / span 3;
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 22px;
  line-height: 1.15;
  color: var(--c-gold);
}
.page-about .ab-step__title {
  font-family: var(--font-head);
  font-size: 17px;
  letter-spacing: -.008em;
  color: var(--c-head);
}
.page-about .ab-step__desc {
  margin: 2px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(200, 214, 226, .74);
}
.page-about .ab-step__more {
  display: block;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .03em;
  color: var(--c-cyan);
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height .22s var(--ease), opacity .22s var(--ease), margin-top .22s var(--ease);
}
.page-about .ab-step:hover .ab-step__more,
.page-about .ab-step:focus-visible .ab-step__more {
  max-height: 4em;
  opacity: 1;
  margin-top: 8px;
}
@media (hover: none) {
  .page-about .ab-step__more {
    max-height: 4em;
    opacity: 1;
    margin-top: 8px;
  }
}

/* ---------- 团队分工 ---------- */
.page-about .ab-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 40px);
  margin-top: 22px;
}
.page-about .ab-roles {
  display: grid;
  gap: 18px;
}
.page-about .ab-role__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}
.page-about .ab-role__name {
  font-family: var(--font-head);
  font-size: 17px;
  letter-spacing: -.008em;
  color: var(--c-head);
  transition: color .2s var(--ease);
}
.page-about .ab-role__num {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 14px;
  color: var(--c-gold);
}
.page-about .ab-role__barwrap {
  height: 6px;
  margin: 10px 0 8px;
  background: rgba(200, 214, 226, .1);
  overflow: hidden;
}
.page-about .ab-role__bar {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--c-blue), var(--c-gold));
  transition: background .22s var(--ease);
}
.page-about .ab-role__bar--a { width: 100%; }
.page-about .ab-role__bar--b { width: 75%; }
.page-about .ab-role__bar--c { width: 50%; }
.page-about .ab-role__bar--d { width: 41.7%; }
.page-about .ab-role__bar--e { width: 33.3%; }
.page-about .ab-role__bar--f { width: 16.7%; }
.page-about .ab-role__desc {
  max-width: 44em;
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(200, 214, 226, .72);
}
.page-about .ab-role:hover .ab-role__name {
  color: var(--c-gold);
}
.page-about .ab-role:hover .ab-role__bar {
  background: linear-gradient(90deg, var(--c-gold), var(--c-coral));
}

/* ---------- 版本演进 ---------- */
.page-about .ab-vers {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  border-top: 1px solid var(--ab-hair);
}
.page-about .ab-vers__item {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 2px 16px;
  padding: 14px 12px 14px 0;
  border-bottom: 1px solid var(--ab-hair);
  transition: background-color .2s var(--ease), padding-left .2s var(--ease);
}
.page-about .ab-vers__item:hover {
  background: var(--ab-soft);
  padding-left: 10px;
}
.page-about .ab-vers__year {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--c-gold);
}
.page-about .ab-vers__title {
  font-family: var(--font-head);
  font-size: 17px;
  letter-spacing: -.008em;
  color: var(--c-head);
}
.page-about .ab-vers__desc {
  grid-column: 1 / -1;
  margin-top: 4px;
  font-size: 15px;
  line-height: 1.72;
  color: rgba(200, 214, 226, .72);
}

/* ---------- 合作生态 ---------- */
.page-about .ab-partners {
  background: var(--c-paper);
  color: var(--c-black);
  padding-block: clamp(46px, 7vw, 92px);
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
}
.page-about .ab-partners__head h2 {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(24px, 3vw, 38px);
  line-height: 1.1;
  letter-spacing: -.022em;
  color: var(--c-black);
}
.page-about .ab-partners__head p {
  max-width: 38em;
  margin: 0;
  font-size: 17px;
  line-height: 1.8;
  color: var(--c-graphite);
}

.page-about .ab-ring {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 22px clamp(18px, 3vw, 40px);
  margin: 34px 0 0;
  padding: 0;
}
.page-about .ab-ring__item {
  position: relative;
  display: grid;
  gap: 8px;
  padding-top: 18px;
  border-top: 1px solid var(--c-line);
  outline: none;
  transition: border-color .2s var(--ease);
}
.page-about .ab-ring__item::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--c-coral);
  transition: width .24s var(--ease);
}
.page-about .ab-ring__item:hover::before,
.page-about .ab-ring__item:focus-visible::before {
  width: 100%;
}
.page-about .ab-ring__count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  border: 1px solid var(--c-blue);
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: 20px;
  color: var(--c-blue);
}
.page-about .ab-ring__label {
  font-family: var(--font-head);
  font-size: 18px;
  letter-spacing: -.008em;
  color: var(--c-black);
}
.page-about .ab-ring__desc {
  font-size: 15px;
  line-height: 1.72;
  color: var(--c-graphite);
}
.page-about .ab-ring__tag {
  display: block;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--c-coral);
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height .2s var(--ease), opacity .2s var(--ease), margin-top .2s var(--ease);
}
.page-about .ab-ring__item:hover .ab-ring__tag,
.page-about .ab-ring__item:focus-visible .ab-ring__tag {
  max-height: 3em;
  opacity: 1;
  margin-top: 6px;
}
@media (hover: none) {
  .page-about .ab-ring__tag {
    max-height: 3em;
    opacity: 1;
    margin-top: 6px;
  }
}

.page-about .ab-acclaim {
  margin-top: clamp(30px, 4vw, 48px);
  padding: 20px 22px;
  border-left: 3px solid var(--c-gold);
  background: rgba(216, 165, 65, .1);
}
.page-about .ab-acclaim p {
  max-width: 46em;
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: #3d4a56;
}

/* ---------- 延伸入口 ---------- */
.page-about .ab-next {
  padding-block: clamp(44px, 7vw, 88px);
  background: linear-gradient(180deg, var(--c-ink) 0%, #0d2035 100%);
}
.page-about .ab-next__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 44px);
  align-items: center;
}
.page-about .ab-next__lead h2 {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(24px, 3vw, 36px);
  line-height: 1.12;
  letter-spacing: -.022em;
  color: var(--c-head);
}
.page-about .ab-next__lead p {
  max-width: 36em;
  margin: 0;
  font-size: 17px;
  line-height: 1.8;
  color: rgba(200, 214, 226, .8);
}
.page-about .ab-next__links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0;
  padding: 0;
}
.page-about .ab-next__links .btn {
  display: inline-block;
  text-decoration: none;
}

/* ---------- 断点 ---------- */
@media (min-width: 768px) {
  .page-about .ab-vers__item {
    grid-template-columns: 80px 210px minmax(0, 1fr);
    gap: 2px 20px;
    align-items: baseline;
  }
  .page-about .ab-vers__desc {
    grid-column: 3;
    margin-top: 0;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    gap: clamp(30px, 4vw, 60px);
  }
  .page-about .ab-split {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, .5fr);
    align-items: start;
  }
  .page-about .ab-figure--tall {
    margin-top: 0;
  }
  .page-about .ab-next__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  }
  .page-about .ab-next__links {
    justify-content: flex-end;
  }
}

@media (min-width: 1024px) {
  .page-about .ab-track::before {
    content: "";
    position: absolute;
    left: calc(var(--ab-rail) / 2);
    top: 0;
    bottom: 0;
    width: 1px;
    background: linear-gradient(
      180deg,
      rgba(216, 165, 65, 0) 0%,
      rgba(216, 165, 65, .5) 6%,
      rgba(200, 214, 226, .2) 58%,
      rgba(216, 165, 65, 0) 100%
    );
  }
  .page-about .ab-node {
    grid-template-columns: var(--ab-rail) minmax(0, 1fr) var(--ab-note);
    column-gap: var(--ab-gap);
    align-items: start;
  }
  .page-about .ab-node__mark {
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding-top: 8px;
  }
  .page-about .ab-node__note {
    padding-top: 10px;
  }
  .page-about .ab-node__note {
    position: sticky;
    top: calc(var(--bar-h) + 24px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-step__more,
  .page-about .ab-ring__tag,
  .page-about .ab-role__bar,
  .page-about .ab-vers__item,
  .page-about .ab-ring__item::before {
    transition: none;
  }
}
</｜｜DSML｜｜ parameter>
</｜｜DSML｜｜ invoke>
</｜｜DSML｜｜ calls>