.page-about {
  --ab-stack: clamp(20px, 3.4vw, 34px);
  --ab-rail-w: 136px;
  background: var(--ky-paper);
  color: var(--ky-ink);
}

.page-about .ky-section {
  padding-block: clamp(40px, 6vw, 76px);
}

/* ---------- 首屏 ---------- */

.page-about .ab-hero {
  padding-top: clamp(20px, 3vw, 34px);
}

.page-about .ab-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--ab-stack);
  align-items: start;
}

.page-about .ab-hero__lead > * + * {
  margin-top: 1em;
}

.page-about .ab-hero__lead .ky-lede {
  max-width: 40em;
}

.page-about .ab-hero__lead .ky-actions {
  margin-top: 1.6em;
}

.page-about .ab-file {
  position: relative;
  padding: clamp(20px, 3vw, 28px);
  border: var(--ky-line);
  border-top: 3px solid var(--ky-bronze);
  border-radius: var(--ky-r-lg);
  background: var(--ky-paper-2);
}

.page-about .ab-file__title {
  margin: 0 0 14px;
  font-family: var(--ky-font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--ky-slate);
}

.page-about .ab-file__list {
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-file__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: baseline;
  padding-bottom: 12px;
  border-bottom: 1px dashed rgba(152, 162, 166, 0.6);
}

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

.page-about .ab-file__row dt {
  font-size: 14px;
  color: var(--ky-slate);
}

.page-about .ab-file__row dd {
  margin: 0;
  font-size: 15px;
  font-variant-numeric: tabular-nums;
  color: var(--ky-ink);
  text-align: right;
}

/* ---------- 通用小标题 ---------- */

.page-about .ab-head {
  max-width: 46em;
  margin-bottom: clamp(24px, 3.4vw, 40px);
}

.page-about .ab-head > * + * {
  margin-top: 0.7em;
}

.page-about .ab-head__lede {
  color: var(--ky-slate);
  font-size: 17px;
  line-height: 1.8;
  margin-bottom: 0;
}

/* ---------- 产品线 ---------- */

.page-about .ab-lines__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 2.4vw, 26px);
}

.page-about .ab-line {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: clamp(22px, 3vw, 34px);
  border-radius: var(--ky-r-lg);
}

.page-about .ab-line p {
  margin: 0;
  line-height: 1.8;
}

.page-about .ab-line__year {
  font-size: clamp(30px, 4vw, 40px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--ky-bronze);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-line__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
}

.page-about .ab-line__list li {
  position: relative;
  padding-left: 20px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ky-ink-2);
}

.page-about .ab-line__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 11px;
  height: 2px;
  background: var(--ky-bronze);
  border-radius: 2px;
}

.page-about .ab-line__foot {
  margin-top: auto;
}

/* ---------- 通栏实物图 ---------- */

.page-about .ab-plate {
  padding-block: clamp(28px, 4vw, 52px);
}

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

/* ---------- 时间轴 ---------- */

.page-about .ab-timeline__figure {
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-about .ab-timeline__body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
}

.page-about .ab-scale {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-about .ab-scale__node {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 15px;
  border: 1px solid transparent;
  border-radius: var(--ky-r-pill);
  background: var(--ky-paper-2);
  color: var(--ky-ink-2);
  font-family: var(--ky-font-mono);
  font-size: 14px;
  letter-spacing: 0.05em;
  font-variant-numeric: tabular-nums;
  text-decoration: none;
  white-space: nowrap;
  transition:
    background var(--ky-dur) var(--ky-ease),
    color var(--ky-dur) var(--ky-ease),
    border-color var(--ky-dur) var(--ky-ease);
}

.page-about .ab-scale__dot {
  width: 8px;
  height: 8px;
  flex: none;
  border-radius: 50%;
  background: var(--ky-slate-lt);
  transition: background var(--ky-dur) var(--ky-ease);
}

.page-about .ab-scale__node:hover,
.page-about .ab-scale__node:focus-visible {
  background: var(--ky-bronze-wash);
  border-color: var(--ky-bronze);
  color: var(--ky-bronze);
}

.page-about .ab-scale__node:hover .ab-scale__dot,
.page-about .ab-scale__node:focus-visible .ab-scale__dot {
  background: var(--ky-bronze);
}

.page-about .ab-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
}

.page-about .ab-track__item {
  padding: clamp(20px, 2.8vw, 30px);
  border-radius: var(--ky-r-md);
  border-left: 3px solid var(--ky-bronze);
  background: var(--ky-paper-2);
  scroll-margin-top: 132px;
}

.page-about .ab-track__item > * + * {
  margin-top: 0.8em;
}

.page-about .ab-track__item p {
  margin: 0;
  line-height: 1.8;
  color: var(--ky-ink-2);
}

.page-about .ab-track__year {
  font-family: var(--ky-font-mono);
  font-size: 14px;
  letter-spacing: 0.14em;
  color: var(--ky-bronze);
  font-variant-numeric: tabular-nums;
}

/* ---------- 规模与覆盖 ---------- */

.page-about .ab-scale-sec__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 44px);
  align-items: start;
}

.page-about .ab-scale-sec__copy > * + * {
  margin-top: 1.2em;
}

.page-about .ab-scale-sec__copy p {
  line-height: 1.8;
  margin-bottom: 0;
}

.page-about .ab-figures {
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: rgba(152, 162, 166, 0.45);
  border: 1px solid rgba(152, 162, 166, 0.45);
  border-radius: var(--ky-r-md);
  overflow: hidden;
}

.page-about .ab-figures__item {
  padding: clamp(16px, 2.2vw, 24px);
  background: var(--ky-paper);
}

.page-about .ab-figures__item dt {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--ky-slate);
}

.page-about .ab-figures__item dd {
  margin: 8px 0 0;
  font-size: 16px;
  line-height: 1.5;
  color: var(--ky-ink);
}

.page-about .ab-figures__num {
  display: inline-block;
  margin-right: 4px;
  font-size: clamp(26px, 3.6vw, 36px);
  line-height: 1;
  color: var(--ky-bronze);
  font-variant-numeric: tabular-nums;
}

/* ---------- 做事方式 ---------- */

.page-about .ab-way__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 2.6vw, 28px);
}

.page-about .ab-way__item {
  padding-top: clamp(16px, 2vw, 22px);
  border-top: 2px solid var(--ky-ink);
}

.page-about .ab-way__item > * + * {
  margin-top: 0.7em;
}

.page-about .ab-way__item p {
  margin: 0;
  line-height: 1.8;
  color: var(--ky-ink-2);
}

.page-about .ab-way__item p a {
  color: var(--ky-bronze);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .ab-way__num {
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--ky-slate);
  font-variant-numeric: tabular-nums;
}

/* ---------- 资质与合作 ---------- */

.page-about .ab-cred__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .ab-cred__cell {
  padding: clamp(20px, 2.6vw, 28px);
  border: 1px solid rgba(31, 106, 92, 0.32);
  border-radius: var(--ky-r-pill);
  background: var(--ky-bronze-wash);
}

.page-about .ab-cred__cell > * + * {
  margin-top: 0.55em;
}

.page-about .ab-cred__cell p {
  margin: 0;
  line-height: 1.7;
  color: var(--ky-ink-2);
}

.page-about .ab-cred__num {
  font-size: clamp(24px, 3vw, 30px);
  line-height: 1;
  color: var(--ky-bronze);
  font-variant-numeric: tabular-nums;
}

.page-about .ab-cred__foot {
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding-top: 18px;
  border-top: 1px dashed rgba(152, 162, 166, 0.7);
  font-size: 15px;
  line-height: 1.8;
  color: var(--ky-slate);
}

.page-about .ab-cred__foot a {
  color: var(--ky-bronze);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .ab-cred__foot .ky-mono {
  color: var(--ky-ink-2);
  font-variant-numeric: tabular-nums;
}

/* ---------- 折叠块 ---------- */

.page-about .ky-fold__btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-about .ab-lines__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 900px) {
  .page-about .ab-hero__inner {
    grid-template-columns: minmax(0, 1.6fr) minmax(280px, 0.9fr);
    gap: clamp(32px, 4.4vw, 64px);
  }

  .page-about .ab-scale-sec__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  }
}

@media (min-width: 860px) {
  .page-about .ab-timeline__body {
    grid-template-columns: var(--ab-rail-w) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 60px);
  }

  .page-about .ab-scale {
    position: sticky;
    top: 108px;
    align-self: start;
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .ab-scale::before {
    content: "";
    position: absolute;
    left: 5px;
    top: 12px;
    bottom: 12px;
    width: 0;
    border-left: 1px dashed var(--ky-slate-lt);
  }

  .page-about .ab-scale__node {
    position: relative;
    padding: 9px 10px 9px 24px;
    border-radius: var(--ky-r-sm);
    background: transparent;
    text-align: left;
  }

  .page-about .ab-scale__dot {
    position: absolute;
    left: 2px;
    top: 50%;
    transform: translateY(-50%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-scale__node,
  .page-about .ab-scale__dot {
    transition: none;
  }
}
</｜｜DSML｜｜ parameter>
</｜｜DSML｜｜ invoke>
</｜｜DSML｜｜ calls>