.page-about {
  --ab-gutter: 16px;
  --ab-line: rgba(198, 193, 182, 0.28);
  background-color: var(--ls-cream);
  background-image: repeating-linear-gradient(
    90deg,
    var(--ab-line) 0 1px,
    transparent 1px 88px
  );
  color: var(--ls-ink);
  font-family: var(--ls-font-body);
  font-size: 17px;
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about .ab-shell {
  width: 100%;
  max-width: var(--ls-shell);
  margin: 0 auto;
  padding: 0 var(--ab-gutter);
}

/* ---------- 页首 ---------- */
.page-about .ab-open {
  background: var(--ls-ink);
  color: var(--ls-cream);
  padding: 40px 0 72px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 34px), 0 100%);
  margin-top: -1px;
}

.page-about .ab-open__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-about .ab-open__eyebrow {
  font-family: var(--ls-font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ls-yellow);
  margin: 0 0 14px;
}

.page-about .ab-open h1 {
  font-family: var(--ls-font-display);
  font-size: clamp(30px, 7.4vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 700;
  margin: 0 0 18px;
  color: var(--ls-cream);
}

.page-about .ab-open__lede {
  margin: 0;
  max-width: 62ch;
  color: rgba(244, 240, 230, 0.82);
  font-size: 17px;
  line-height: 1.8;
}

.page-about .ab-open__note {
  border: 2px solid var(--ls-rock);
  border-radius: var(--ls-radius);
  background: var(--ls-slate);
  padding: 20px 20px 22px;
}

.page-about .ab-open__statnum {
  font-family: var(--ls-font-mono);
  font-size: 46px;
  line-height: 1;
  font-weight: 700;
  margin: 0;
  color: var(--ls-lime);
}

.page-about .ab-open__statnum span {
  font-size: 26px;
  margin-left: 2px;
}

.page-about .ab-open__statlabel {
  margin: 8px 0 14px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--ls-rock);
}

.page-about .ab-open__stattext {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(244, 240, 230, 0.78);
}

.page-about .ab-open__note .ls-btn {
  width: 100%;
  text-align: center;
}

/* ---------- 首图 ---------- */
.page-about .ab-hero {
  margin: 0;
  background: var(--ls-deep);
  position: relative;
}

.page-about .ab-hero img {
  display: block;
  width: 100%;
  height: clamp(200px, 42vw, 400px);
  object-fit: cover;
  filter: saturate(0.92);
}

.page-about .ab-hero figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 10px var(--ab-gutter) 12px;
  background: linear-gradient(to top, rgba(11, 15, 23, 0.88), rgba(11, 15, 23, 0));
  color: rgba(244, 240, 230, 0.9);
  font-size: 13px;
  line-height: 1.6;
}

/* ---------- 三栏骨架 ---------- */
.page-about .ab-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  padding: 36px 0 0;
}

.page-about .ab-rail {
  display: none;
}

.page-about .ab-rail__title,
.page-about .ab-aside__title {
  font-family: var(--ls-font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ls-grey);
  margin: 0 0 12px;
}

.page-about .ls-index {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--ls-rock);
}

.page-about .ls-index__item {
  margin: 0;
}

.page-about .ls-index__link {
  display: block;
  padding: 9px 0 9px 14px;
  margin-left: -2px;
  border-left: 2px solid transparent;
  color: var(--ls-grey);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.4;
  transition: color var(--ls-spy-ease), border-color var(--ls-spy-ease);
}

.page-about .ls-index__link:hover {
  color: var(--ls-clay);
}

.page-about .ls-index__item.is-active .ls-index__link {
  color: var(--ls-red);
  border-left-color: var(--ls-red);
  font-weight: 700;
}

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

/* ---------- 通用章节头 ---------- */
.page-about .ab-sec {
  padding: 32px 0 40px;
  border-top: 2px solid var(--ls-rock);
}

.page-about .ab-sec:first-child {
  border-top: none;
  padding-top: 4px;
}

.page-about .ab-sec__eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--ls-font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ls-clay);
  margin: 0 0 10px;
}

.page-about .ab-sec__eyebrow::before {
  content: "";
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ls-clay);
}

.page-about .ab-no {
  font-weight: 700;
}

.page-about .ab-sec__title {
  font-family: var(--ls-font-display);
  font-size: clamp(23px, 4.6vw, 34px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
  color: var(--ls-ink);
}

.page-about .ab-sec__lede {
  margin: 0 0 22px;
  color: var(--ls-ink-soft);
  max-width: 66ch;
}

.page-about .ls-prose {
  max-width: 68ch;
}

.page-about .ls-prose p {
  margin: 0 0 1.2em;
}

/* ---------- 01 场景 ---------- */
.page-about .ab-scene {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 24px;
}

.page-about .ab-scene__item {
  border: 2px solid var(--ls-ink);
  border-left: 6px solid var(--ls-red);
  border-radius: var(--ls-radius);
  background: #fff;
  box-shadow: var(--ls-soft-shadow);
  padding: 18px 18px 20px;
}

.page-about .ab-scene__item h3 {
  font-family: var(--ls-font-display);
  font-size: 19px;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}

.page-about .ab-scene__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ls-ink-soft);
}

/* ---------- 02 流程 ---------- */
.page-about .ab-flow {
  list-style: none;
  counter-reset: abflow;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  border: 2px solid var(--ls-ink);
  border-radius: var(--ls-radius);
  overflow: hidden;
  background: #fff;
}

.page-about .ab-flow__item {
  padding: 18px 18px 20px;
  border-bottom: 2px solid var(--ls-rock);
  position: relative;
}

.page-about .ab-flow__item:last-child {
  border-bottom: none;
}

.page-about .ab-flow__num {
  display: block;
  font-family: var(--ls-font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--ls-clay);
  margin-bottom: 6px;
}

.page-about .ab-flow__title {
  font-family: var(--ls-font-display);
  font-size: 18px;
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}

.page-about .ab-flow__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ls-ink-soft);
}

.page-about .ab-data__foot {
  margin: 18px 0 0;
  padding: 14px 16px;
  background: var(--ls-ink);
  color: rgba(244, 240, 230, 0.9);
  border-radius: var(--ls-radius);
  font-size: 15px;
  line-height: 1.7;
}

/* ---------- 03 版本带 ---------- */
.page-about .ab-band {
  margin: 0 0 22px;
  border-top: 2px solid var(--ls-ink);
  border-bottom: 2px solid var(--ls-ink);
  background: #fff;
}

.page-about .ab-versions {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 0;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .ab-version {
  flex: 0 0 254px;
  scroll-snap-align: start;
  border-right: 2px solid var(--ls-rock);
}

.page-about .ab-version:last-child {
  border-right: none;
}

.page-about .ab-version .ls-fold__head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 16px 14px;
  cursor: pointer;
  list-style: none;
  background: #fff;
  transition: background var(--ls-ease);
}

.page-about .ab-version .ls-fold__head::-webkit-details-marker {
  display: none;
}

.page-about .ab-version .ls-fold__head:hover {
  background: #f7f4ec;
}

.page-about .ab-version .ls-fold__icon {
  margin-left: auto;
  color: var(--ls-clay);
  font-size: 20px;
  line-height: 1;
  transition: transform var(--ls-ease);
}

.page-about .ab-version details[open] .ls-fold__icon {
  transform: rotate(90deg);
}

.page-about .ab-version details[open] .ls-fold__head {
  background: var(--ls-ink);
  color: var(--ls-cream);
}

.page-about .ab-version details[open] .ls-fold__head .ab-version__year {
  color: var(--ls-lime);
}

.page-about .ab-version__year {
  font-family: var(--ls-font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--ls-clay);
  letter-spacing: -0.01em;
}

.page-about .ab-version__name {
  font-family: var(--ls-font-display);
  font-size: 16px;
  letter-spacing: -0.01em;
}

.page-about .ab-version .ls-fold__body {
  padding: 14px 16px 18px;
  background: var(--ls-cream);
}

.page-about .ab-version .ls-fold__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ls-ink-soft);
}

.page-about .ab-board {
  margin: 0;
  border: 2px solid var(--ls-ink);
  border-radius: var(--ls-radius);
  overflow: hidden;
  box-shadow: var(--ls-soft-shadow);
}

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

.page-about .ab-board .ls-figure__cap {
  background: var(--ls-slate);
  color: rgba(244, 240, 230, 0.86);
  font-size: 13px;
  line-height: 1.6;
  padding: 10px 14px;
}

/* ---------- 04 团队 ---------- */
.page-about .ab-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-bottom: 26px;
}

.page-about .ab-team__card {
  position: relative;
  border: 2px solid var(--ls-ink);
  border-radius: var(--ls-radius);
  background: #fff;
  padding: 20px 18px 22px;
  box-shadow: var(--ls-hard-shadow);
}

.page-about .ab-team__no {
  position: absolute;
  top: 12px;
  right: 14px;
  font-family: var(--ls-font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ls-clay);
}

.page-about .ab-team__num {
  font-family: var(--ls-font-mono);
  font-size: 42px;
  line-height: 1;
  font-weight: 700;
  margin: 0 0 10px;
  color: var(--ls-red);
}

.page-about .ab-team__title {
  font-family: var(--ls-font-display);
  font-size: 18px;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}

.page-about .ab-team__card p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ls-ink-soft);
}

.page-about .ab-week {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  align-items: center;
}

.page-about .ab-week__figure {
  margin: 0;
  border: 2px solid var(--ls-ink);
  border-radius: var(--ls-radius);
  overflow: hidden;
}

.page-about .ab-week__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 1 / 1;
}

.page-about .ab-week__text h3 {
  font-family: var(--ls-font-display);
  font-size: 20px;
  margin: 0 0 12px;
  letter-spacing: -0.01em;
}

.page-about .ab-week__list {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
}

.page-about .ab-week__list li {
  border-left: 4px solid var(--ls-yellow);
  padding: 6px 0 6px 12px;
  margin-bottom: 10px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ls-ink-soft);
}

.page-about .ab-week__list b {
  font-family: var(--ls-font-mono);
  color: var(--ls-ink);
  font-weight: 700;
}

.page-about .ab-week__text p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ls-ink-soft);
}

/* ---------- 05 合作 ---------- */
.page-about .ab-partners {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 24px 0 22px;
}

.page-about .ab-partners__stat {
  background: var(--ls-ink);
  color: var(--ls-cream);
  border-radius: var(--ls-radius);
  padding: 18px 16px;
}

.page-about .ab-partners__stat--wide {
  grid-column: 1 / -1;
  background: var(--ls-red);
}

.page-about .ab-partners__num {
  font-family: var(--ls-font-mono);
  font-size: 40px;
  line-height: 1;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--ls-lime);
}

.page-about .ab-partners__stat--wide .ab-partners__num {
  color: var(--ls-cream);
}

.page-about .ab-partners__num span {
  font-size: 16px;
  margin-left: 4px;
  letter-spacing: 0.06em;
}

.page-about .ab-partners__label {
  margin: 0;
  font-size: 14px;
  color: rgba(244, 240, 230, 0.86);
}

.page-about .ab-partners__stat--wide .ab-partners__label {
  color: rgba(244, 240, 230, 0.95);
}

.page-about .ab-scope {
  border: 2px solid var(--ls-ink);
  border-radius: var(--ls-radius);
  background: #fff;
  padding: 18px;
}

.page-about .ab-scope__label {
  font-family: var(--ls-font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ls-grey);
  margin: 0 0 12px;
}

.page-about .ab-scope__list {
  list-style: none;
  margin: 0 0 12px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .ab-scope__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ls-ink-soft);
}

/* ---------- 06 长期价值 ---------- */
.page-about .ab-value {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .ab-value__item {
  border-top: 4px solid var(--ls-moss);
  border-bottom: 2px solid var(--ls-rock);
  padding: 16px 0 18px;
}

.page-about .ab-value__num {
  font-family: var(--ls-font-mono);
  font-size: 34px;
  line-height: 1;
  font-weight: 700;
  margin: 0 0 10px;
  color: var(--ls-ink);
}

.page-about .ab-value__item h3 {
  font-family: var(--ls-font-display);
  font-size: 18px;
  margin: 0 0 8px;
  letter-spacing: -0.01em;
}

.page-about .ab-value__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ls-ink-soft);
}

.page-about .ab-note {
  margin-top: 24px;
  background: var(--ls-slate);
  color: rgba(244, 240, 230, 0.9);
  border-radius: var(--ls-radius);
  padding: 18px;
}

.page-about .ab-note p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
}

.page-about .ab-note__mark {
  display: inline-block;
  width: 22px;
  height: 3px;
  background: var(--ls-lime);
  margin-right: 10px;
  vertical-align: middle;
}

/* ---------- 侧栏 ---------- */
.page-about .ab-aside__card {
  background: var(--ls-ink);
  color: var(--ls-cream);
  border-radius: var(--ls-radius);
  padding: 18px;
  margin-bottom: 22px;
}

.page-about .ab-aside__card .ab-aside__title {
  color: var(--ls-rock);
}

.page-about .ab-aside__big {
  font-family: var(--ls-font-mono);
  font-size: 24px;
  font-weight: 700;
  margin: 0 0 10px;
  color: var(--ls-lime);
}

.page-about .ab-aside__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(244, 240, 230, 0.82);
}

.page-about .ab-aside__links a {
  display: block;
  padding: 11px 0;
  border-bottom: 1px solid var(--ls-rock);
  color: var(--ls-ink);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.5;
  transition: color var(--ls-ease), border-color var(--ls-ease);
}

.page-about .ab-aside__links a:hover {
  color: var(--ls-red);
  border-bottom-color: var(--ls-red);
}

/* ---------- 收束带 ---------- */
.page-about .ab-slice {
  margin-top: 44px;
  background: var(--ls-red);
  color: var(--ls-cream);
  clip-path: polygon(0 30px, 100% 0, 100% 100%, 0 100%);
  padding: 62px 0 42px;
}

.page-about .ab-slice__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  align-items: center;
}

.page-about .ab-slice__text {
  margin: 0;
  font-family: var(--ls-font-display);
  font-size: clamp(19px, 3.6vw, 26px);
  line-height: 1.35;
  letter-spacing: -0.01em;
}

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

/* ---------- 断点：平板 ---------- */
@media (min-width: 720px) {
  .page-about {
    --ab-gutter: 24px;
  }

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

  .page-about .ab-scene__item:last-child {
    grid-column: 1 / -1;
  }

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

  .page-about .ab-flow__item:nth-child(1),
  .page-about .ab-flow__item:nth-child(2) {
    border-bottom: 2px solid var(--ls-rock);
  }

  .page-about .ab-flow__item:nth-child(odd) {
    border-right: 2px solid var(--ls-rock);
  }

  .page-about .ab-flow__item:nth-child(3),
  .page-about .ab-flow__item:nth-child(4) {
    border-bottom: none;
  }

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

  .page-about .ab-slice__inner {
    grid-template-columns: minmax(0, 1.4fr) auto;
  }

  .page-about .ab-slice__links {
    justify-content: flex-end;
  }
}

/* ---------- 断点：宽屏三栏 ---------- */
@media (min-width: 860px) {
  .page-about .ab-layout {
    grid-template-columns: 196px minmax(0, 1fr);
    gap: 34px;
    padding-top: 44px;
  }

  .page-about .ab-rail {
    display: block;
    position: sticky;
    top: 24px;
  }

  .page-about .ab-open {
    padding: 56px 0 88px;
    clip-path: polygon(0 0, 100% 0, 100% calc(100% - 44px), 0 100%);
  }

  .page-about .ab-open__grid {
    grid-template-columns: minmax(0, 1.65fr) minmax(0, 0.85fr);
    gap: 40px;
    align-items: end;
  }

  .page-about .ab-sec {
    padding: 40px 0 52px;
  }

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

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

  .page-about .ab-scene__item:last-child {
    grid-column: auto;
  }

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

  .page-about .ab-partners__stat--wide {
    grid-column: auto;
  }
}

@media (min-width: 1120px) {
  .page-about .ab-layout {
    grid-template-columns: 196px minmax(0, 1fr) 232px;
    gap: 40px;
  }

  .page-about .ab-aside {
    position: sticky;
    top: 24px;
  }

  .page-about .ab-hero figcaption {
    padding-left: 24px;
    padding-right: 24px;
  }
}

@media (min-width: 1320px) {
  .page-about .ab-hero figcaption {
    padding-left: calc((100vw - var(--ls-shell)) / 2 + 12px);
    padding-right: calc((100vw - var(--ls-shell)) / 2 + 12px);
  }
}
<<<END>>>