.page-about {
  --ab-hair: rgba(145, 167, 196, 0.22);
  --ab-hair-strong: rgba(145, 167, 196, 0.45);
  background: var(--y97-night);
  color: var(--y97-mist);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  padding: 1.5rem 0 3rem;
}

.page-about .ab-hero .y97-crumbs {
  margin-bottom: 1.75rem;
}

.page-about .ab-hero__grid {
  display: grid;
  gap: 1.75rem;
}

.page-about .ab-hero__copy .y97-eyebrow {
  color: var(--y97-yellow);
  letter-spacing: 0.14em;
}

.page-about .ab-hero__copy .y97-h1 {
  margin: 0.6rem 0 1rem;
  font-family: var(--y97-serif);
  color: var(--y97-white);
  line-height: 1.15;
}

.page-about .ab-hero__copy .y97-lead {
  color: var(--y97-mist);
  font-size: 1.0625rem;
  line-height: 1.8;
  margin: 0;
}

.page-about .ab-hero__copy .y97-prose {
  margin: 1rem 0 0;
  color: var(--y97-line);
  font-size: 0.9375rem;
  line-height: 1.8;
}

.page-about .ab-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.page-about .ab-hero__frame {
  position: relative;
  margin: 0;
  padding: 0.7rem;
  border: 1px solid var(--ab-hair-strong);
  border-radius: var(--y97-radius);
  background: linear-gradient(160deg, rgba(16, 42, 67, 0.95), rgba(8, 23, 38, 0.55));
}

.page-about .ab-hero__frame::before,
.page-about .ab-hero__frame::after {
  content: "";
  position: absolute;
  width: 20px;
  height: 20px;
  border: 2px solid var(--y97-yellow);
  border-radius: 4px;
}

.page-about .ab-hero__frame::before {
  top: -5px;
  left: -5px;
  border-right: none;
  border-bottom: none;
}

.page-about .ab-hero__frame::after {
  right: -5px;
  bottom: -5px;
  border-top: none;
  border-left: none;
}

.page-about .ab-hero__frame img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: calc(var(--y97-radius) - 12px);
  object-fit: cover;
}

.page-about .ab-hero__cap {
  margin-top: 0.7rem;
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: var(--y97-line);
  text-align: right;
}

.page-about .ab-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 2.25rem 0 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--ab-hair);
}

.page-about .ab-hero__stats dt {
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--y97-line);
}

.page-about .ab-hero__stats dd {
  margin: 0.3rem 0 0;
  font-family: var(--y97-mono);
  font-size: clamp(1.5rem, 3vw, 2.15rem);
  line-height: 1.1;
  color: var(--y97-yellow);
}

.page-about .ab-hero__stats dd span {
  margin-left: 0.25em;
  font-size: 0.75rem;
  color: var(--y97-mist);
  opacity: 0.72;
}

/* ---------- 通用章节头 ---------- */
.page-about .ab-sec-head {
  max-width: 44rem;
  margin-bottom: 1.75rem;
}

.page-about .ab-sec-head .y97-eyebrow {
  color: var(--y97-yellow);
  letter-spacing: 0.14em;
}

.page-about .ab-sec-head .y97-h2 {
  margin: 0.5rem 0 0;
  font-family: var(--y97-serif);
  line-height: 1.25;
}

.page-about .ab-sec-head .y97-lead {
  margin: 0.75rem 0 0;
  color: var(--y97-line);
  font-size: 1rem;
  line-height: 1.8;
}

/* ---------- 品牌故事 ---------- */
.page-about .ab-story {
  padding: 3rem 0;
  border-top: 1px solid var(--ab-hair);
}

.page-about .ab-story__grid {
  display: grid;
  gap: 1.75rem;
}

.page-about .ab-story__main .y97-prose {
  margin: 0;
  color: var(--y97-mist);
  line-height: 1.85;
}

.page-about .ab-story__main .y97-prose + .y97-prose {
  margin-top: 1.125rem;
}

.page-about .ab-quote {
  margin: 1.5rem 0 0;
  padding: 1.125rem 1.25rem;
  border-radius: 20px;
  border-left: 3px solid var(--y97-yellow);
  background: var(--y97-night-2);
  font-family: var(--y97-serif);
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--y97-white);
}

.page-about .ab-story__side {
  align-self: start;
  padding-left: 1.125rem;
  border-left: 2px solid var(--y97-wood);
}

.page-about .ab-side__label {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--y97-yellow);
  text-transform: uppercase;
}

.page-about .ab-side__list {
  list-style: none;
  margin: 0.9rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--y97-mist);
}

.page-about .ab-dot {
  display: inline-block;
  width: 0.5rem;
  height: 0.5rem;
  margin-right: 0.5rem;
  border-radius: var(--y97-pill);
  vertical-align: middle;
}

.page-about .ab-dot--wood { background: var(--y97-wood); }
.page-about .ab-dot--yellow { background: var(--y97-yellow); }
.page-about .ab-dot--green { background: var(--y97-green); }
.page-about .ab-dot--blue { background: var(--y97-blue); }

/* ---------- 新旧并行 ---------- */
.page-about .ab-diff {
  padding: 3rem 0;
  background: linear-gradient(180deg, rgba(16, 42, 67, 0.85), rgba(8, 23, 38, 0));
}

.page-about .ab-diff__grid {
  display: grid;
  gap: 1.5rem;
}

.page-about .ab-diff__seam {
  display: block;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(111, 78, 55, 0.9), transparent);
}

.page-about .ab-version {
  padding: 0.25rem 0;
}

.page-about .ab-version__tag {
  display: inline-block;
  margin: 0 0 0.85rem;
  padding: 0.25rem 0.8rem;
  border-radius: var(--y97-pill);
  border: 1px solid var(--ab-hair-strong);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.page-about .ab-version--old .ab-version__tag {
  color: var(--y97-mist);
  background: rgba(111, 78, 55, 0.28);
  border-color: rgba(111, 78, 55, 0.95);
}

.page-about .ab-version--new .ab-version__tag {
  color: var(--y97-night);
  background: var(--y97-yellow);
  border-color: var(--y97-yellow);
}

.page-about .ab-version__title {
  margin: 0 0 0.6rem;
  font-family: var(--y97-serif);
  font-size: 1.2rem;
  color: var(--y97-white);
}

.page-about .ab-version__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--y97-mist);
}

.page-about .ab-ticks {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
  font-size: 0.9375rem;
  line-height: 1.7;
}

.page-about .ab-ticks li {
  position: relative;
  padding-left: 1.4rem;
  color: var(--y97-mist);
}

.page-about .ab-ticks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 0.75rem;
  height: 1px;
  background: var(--y97-yellow);
}

.page-about .ab-shared {
  margin: 1.75rem 0 0;
  padding: 1rem 1.25rem;
  border-radius: 18px;
  border: 1px solid rgba(91, 141, 239, 0.38);
  background: rgba(91, 141, 239, 0.1);
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--y97-mist);
}

/* ---------- 团队 ---------- */
.page-about .ab-team {
  padding: 3rem 0;
  border-top: 1px solid var(--ab-hair);
}

.page-about .ab-team__grid {
  display: grid;
  gap: 1.75rem;
}

.page-about .ab-team__fig {
  margin: 0;
  border-radius: var(--y97-radius);
  overflow: hidden;
  border: 1px solid var(--ab-hair);
}

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

.page-about .ab-team__items {
  display: grid;
  gap: 1.125rem;
}

.page-about .ab-team__item {
  padding: 1.25rem;
  border-radius: 20px;
  border: 1px solid var(--ab-hair);
  background: rgba(245, 241, 230, 0.04);
  transition: transform var(--y97-dur) var(--y97-ease),
    border-color var(--y97-dur) var(--y97-ease);
}

.page-about .ab-team__item:hover,
.page-about .ab-team__item:focus-within {
  transform: translateY(-2px);
  border-color: var(--y97-yellow);
}

.page-about .ab-team__num {
  margin: 0;
  font-family: var(--y97-mono);
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  line-height: 1;
  color: var(--y97-yellow);
}

.page-about .ab-team__num span {
  margin-left: 0.35em;
  font-size: 0.875rem;
  color: var(--y97-line);
}

.page-about .ab-team__title {
  margin: 0.6rem 0 0.5rem;
  font-size: 1.0625rem;
  font-family: var(--y97-sans);
  font-weight: 700;
  color: var(--y97-white);
}

.page-about .ab-team__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--y97-mist);
}

/* ---------- 拉萨节点 ---------- */
.page-about .ab-node {
  padding: 3rem 0 2rem;
  background: linear-gradient(180deg, rgba(16, 42, 67, 0), rgba(16, 42, 67, 0.72));
}

.page-about .ab-node__grid {
  display: grid;
  gap: 1.75rem;
}

.page-about .ab-node__copy .y97-prose {
  margin: 0;
  color: var(--y97-mist);
  line-height: 1.85;
}

.page-about .ab-node__copy .y97-prose + .y97-prose {
  margin-top: 1rem;
}

.page-about .ab-node__data {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.875rem;
  margin: 1.5rem 0 0;
  padding-top: 1.125rem;
  border-top: 1px solid var(--ab-hair);
}

.page-about .ab-node__data dt {
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--y97-line);
}

.page-about .ab-node__data dd {
  margin: 0.25rem 0 0;
  font-size: 1rem;
  color: var(--y97-white);
}

.page-about .ab-node__fig {
  margin: 0;
  border-radius: var(--y97-radius);
  overflow: hidden;
  border: 1px solid var(--ab-hair-strong);
}

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

.page-about .ab-node__cap {
  padding: 0.7rem 0.9rem;
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: var(--y97-line);
  background: rgba(8, 23, 38, 0.65);
}

.page-about .ab-ridge {
  display: block;
  width: 100%;
  height: auto;
  margin-top: 1.5rem;
  color: rgba(91, 141, 239, 0.55);
}

/* ---------- 时间线（浅色画布） ---------- */
.page-about .ab-time {
  padding: 3rem 0;
  background: var(--y97-mist);
  color: var(--y97-night);
}

.page-about .ab-time .ab-sec-head .y97-h2 {
  color: var(--y97-night);
}

.page-about .ab-time .ab-sec-head .y97-eyebrow {
  color: var(--y97-wood);
}

.page-about .ab-time .ab-sec-head .y97-lead {
  color: rgba(8, 23, 38, 0.72);
}

.page-about .ab-tl {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .ab-tl__item {
  position: relative;
  display: grid;
  gap: 0.375rem;
  padding: 1rem 0 1rem 1.5rem;
  border-left: 1px solid rgba(8, 23, 38, 0.18);
}

.page-about .ab-tl__item::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 1.55rem;
  width: 7px;
  height: 7px;
  border-radius: var(--y97-pill);
  background: var(--y97-yellow);
  box-shadow: 0 0 0 3px var(--y97-mist);
}

.page-about .ab-tl__year {
  margin: 0;
  font-family: var(--y97-mono);
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--y97-wood);
}

.page-about .ab-tl__body h3 {
  margin: 0 0 0.3rem;
  font-family: var(--y97-serif);
  font-size: 1.0625rem;
  color: var(--y97-night);
}

.page-about .ab-tl__body p {
  margin: 0;
  max-width: 40rem;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: rgba(8, 23, 38, 0.76);
}

/* ---------- 运营原则 ---------- */
.page-about .ab-principles {
  padding: 3rem 0 3.5rem;
  background: var(--y97-night-2);
}

.page-about .ab-principles__grid {
  display: grid;
  gap: 1rem;
}

.page-about .ab-principles__card {
  padding: 1.25rem;
  border-radius: 20px;
  border: 1px solid var(--ab-hair);
  background: rgba(8, 23, 38, 0.55);
}

.page-about .ab-principles__card h3 {
  margin: 0 0 0.5rem;
  font-family: var(--y97-sans);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--y97-yellow);
}

.page-about .ab-principles__card p {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: var(--y97-mist);
}

.page-about .ab-principles__icp {
  margin: 1.75rem 0 0;
  padding-top: 1.25rem;
  border-top: 1px dashed var(--ab-hair-strong);
  font-size: 0.9375rem;
  line-height: 1.9;
  color: var(--y97-mist);
}

.page-about .ab-link {
  color: var(--y97-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .ab-link:hover {
  color: var(--y97-yellow);
}

.page-about .y97-mono {
  font-family: var(--y97-mono);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .ab-hero {
    padding: 2rem 0 3.5rem;
  }

  .page-about .ab-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.25rem;
    margin-top: 2.75rem;
  }

  .page-about .ab-tl__item {
    grid-template-columns: 6rem minmax(0, 1fr);
    gap: 1.5rem;
    padding: 1.125rem 0 1.125rem 2rem;
  }

  .page-about .ab-tl__year {
    font-size: 1rem;
    text-align: right;
  }

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

@media (min-width: 960px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 3rem;
    align-items: center;
  }

  .page-about .ab-story__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: 3rem;
  }

  .page-about .ab-diff__grid {
    grid-template-columns: minmax(0, 4fr) 1px minmax(0, 8fr);
    gap: 2.25rem;
    align-items: start;
  }

  .page-about .ab-diff__seam {
    height: 100%;
    min-height: 12rem;
    width: 1px;
    background: linear-gradient(180deg, transparent, rgba(111, 78, 55, 0.9), transparent);
  }

  .page-about .ab-team__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 2.5rem;
    align-items: start;
  }

  .page-about .ab-node__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 2.5rem;
    align-items: center;
  }
}

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

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