.page-about {
  --ab-rail: 88px;
  background: var(--ink);
  color: var(--ivory);
  font-family: var(--font-sans);
  line-height: 1.95;
  overflow-x: hidden;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-serif);
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.28;
  margin: 0;
}

.page-about .container {
  width: 100%;
  max-width: var(--w);
  margin: 0 auto;
  padding-left: var(--pad);
  padding-right: var(--pad);
}

.page-about .crumb {
  padding-top: 22px;
  font-size: 13px;
  color: var(--smoke);
  letter-spacing: 0.02em;
}

.page-about .crumb a {
  color: var(--smoke);
  text-decoration: none;
}

.page-about .crumb a:hover {
  color: var(--gold-lt);
}

.page-about .crumb__sep {
  margin: 0 8px;
  color: var(--gold-dk);
}

.page-about .crumb [aria-current="true"] {
  color: var(--gold);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: 28px 0 clamp(38px, 6vw, 64px);
  background:
    radial-gradient(120% 90% at 82% 0%, rgba(212, 168, 87, 0.16) 0%, rgba(10, 10, 11, 0) 58%),
    linear-gradient(180deg, var(--ink-2) 0%, var(--ink) 78%);
  border-bottom: 1px solid var(--line);
}

.page-about .ab-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gold);
  text-transform: uppercase;
}

.page-about .kicker::before {
  content: "";
  width: 34px;
  height: 1px;
  background: var(--gold-grad);
}

.page-about .ab-hero h1 {
  font-size: clamp(34px, 6.2vw, 58px);
  background: var(--gold-grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 1px 0 rgba(0, 0, 0, 0.25);
}

.page-about .lead {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 2;
  color: rgba(244, 237, 224, 0.82);
  margin: 18px 0 0;
  max-width: 62ch;
}

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

.page-about .ab-hero__aside {
  border-left: 1px solid var(--line);
  padding-left: 18px;
}

.page-about .ab-hero__aside-title {
  margin: 0 0 12px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--smoke);
}

.page-about .ab-toc {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .ab-toc a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line-soft);
  color: var(--ivory);
  text-decoration: none;
  font-size: 14px;
  transition: color 160ms ease, padding-left 160ms ease;
}

.page-about .ab-toc a:hover,
.page-about .ab-toc a:focus-visible {
  color: var(--gold-lt);
  padding-left: 6px;
}

.page-about .ab-toc .num {
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold-dk);
}

.page-about .ab-hero__aside-note {
  margin: 16px 0 0;
  font-size: 12.5px;
  color: var(--smoke);
  line-height: 1.7;
}

/* ---------- 数据条 ---------- */
.page-about .ab-stats {
  padding: clamp(26px, 4vw, 44px) 0;
  background: var(--ink-2);
  border-bottom: 1px solid var(--line);
}

.page-about .ab-stats__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line-soft);
}

.page-about .ab-stat {
  background: var(--ink-2);
  padding: 18px 14px 20px;
}

.page-about .ab-stat__num {
  font-family: var(--font-num);
  font-size: clamp(30px, 5vw, 42px);
  line-height: 1;
  color: var(--gold-lt);
  letter-spacing: -0.01em;
}

.page-about .ab-stat__unit {
  font-family: var(--font-num);
  font-size: 13px;
  color: var(--gold-dk);
  margin-left: 4px;
  letter-spacing: 0.06em;
}

.page-about .ab-stat__label {
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.72;
  color: var(--smoke);
}

/* ---------- 章节通用 ---------- */
.page-about .section {
  padding: clamp(44px, 7vw, 82px) 0;
}

.page-about .ab-chapter {
  border-top: 1px solid var(--line-soft);
}

.page-about .ab-chapter__head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .ab-chapter__no {
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .ab-chapter__intro h2 {
  font-size: clamp(26px, 4.4vw, 38px);
  color: var(--ivory);
  max-width: 24ch;
}

.page-about .ab-chapter__intro .lead {
  margin-top: 14px;
}

/* ---------- 时间线 ---------- */
.page-about .ab-timeline {
  position: relative;
  display: grid;
  gap: 22px;
  padding-left: 22px;
  border-left: 1px solid var(--line-strong);
}

.page-about .ab-tl__item {
  position: relative;
  background: var(--ink-2);
  border: 1px solid var(--line-soft);
  border-radius: 0;
  padding: 20px 18px 22px;
  transition: border-color 200ms ease, transform 200ms ease;
}

.page-about .ab-tl__item::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 26px;
  width: 10px;
  height: 10px;
  background: var(--gold);
  box-shadow: 0 0 0 3px var(--ink);
}

.page-about .ab-tl__item:hover {
  border-color: var(--line-strong);
  transform: translateY(-3px);
}

.page-about .ab-tl__item h3 {
  font-size: 20px;
  color: var(--gold-lt);
  margin: 12px 0 8px;
}

.page-about .ab-tl__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.92;
  color: rgba(244, 237, 224, 0.78);
}

.page-about .tag {
  display: inline-block;
  padding: 3px 10px;
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  transform: rotate(-2.2deg);
  transition: transform 200ms ease;
}

.page-about .tag--gold {
  color: var(--gold-lt);
  border: 1px solid var(--line-strong);
  background: rgba(212, 168, 87, 0.08);
}

.page-about .tag--jade {
  color: var(--jade);
  border: 1px solid rgba(89, 184, 160, 0.45);
  background: rgba(89, 184, 160, 0.07);
}

.page-about .tag:hover {
  transform: rotate(0deg);
}

/* ---------- 图片基座 ---------- */
.page-about .media {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: var(--steel);
  border: 1px solid var(--line);
}

.page-about .media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  transition: transform 420ms ease, filter 320ms ease;
}

.page-about .media:hover img {
  transform: scale(1.03);
}

.page-about .media:hover {
  border-color: var(--line-strong);
  box-shadow: inset 0 0 0 1px rgba(241, 210, 140, 0.28);
}

.page-about .media__cap {
  padding: 10px 12px;
  font-size: 12px;
  line-height: 1.65;
  color: var(--smoke);
  border-top: 1px solid var(--line-soft);
  background: var(--ink);
}

.page-about .media--tall img {
  aspect-ratio: 3 / 4;
}

.page-about .media--wide img {
  aspect-ratio: 16 / 9;
}

.page-about .media--square img {
  aspect-ratio: 1 / 1;
}

.page-about .ab-figure {
  margin: 4px 0;
}

.page-about .ab-wide-figure {
  margin: 0 0 clamp(24px, 4vw, 40px);
}

/* ---------- 空间网格 ---------- */
.page-about .ab-spaces {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .ab-space {
  background: var(--ink-2);
  padding: 22px 18px;
  transition: background 200ms ease;
}

.page-about .ab-space:hover {
  background: var(--ink);
}

.page-about .ab-space__no {
  display: block;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gold-dk);
  margin: 0 0 8px;
}

.page-about .ab-space h3 {
  font-size: 20px;
  color: var(--ivory);
  margin-bottom: 8px;
}

.page-about .ab-space p {
  margin: 0;
  font-size: 14px;
  line-height: 1.9;
  color: rgba(244, 237, 224, 0.76);
}

.page-about .ab-space--img {
  padding: 0;
  background: var(--ink);
}

.page-about .ab-space--img .media {
  border: 0;
  height: 100%;
}

.page-about .ab-space--img .media img {
  height: 100%;
}

/* ---------- SVG 剖面 ---------- */
.page-about .ab-svgplate {
  margin-top: clamp(24px, 4vw, 40px);
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(20, 20, 22, 0.9), rgba(10, 10, 11, 0.95)),
    repeating-linear-gradient(90deg, rgba(212, 168, 87, 0.06) 0 1px, transparent 1px 62px);
  padding: 18px 16px 12px;
}

.page-about .ab-svgplate__title {
  margin: 0 0 6px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

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

/* ---------- 团队 ---------- */
.page-about .ab-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-bottom: clamp(24px, 4vw, 38px);
}

.page-about .ab-team__card {
  background: var(--ink-2);
  border: 1px solid var(--line-soft);
  border-radius: 0;
  padding: 22px 18px;
  transition: transform 200ms ease, border-color 200ms ease;
}

.page-about .ab-team__card:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
}

.page-about .ab-team__num {
  font-family: var(--font-num);
  font-size: clamp(28px, 4.6vw, 38px);
  line-height: 1;
  color: var(--gold-lt);
  margin: 0;
}

.page-about .ab-team__card h3 {
  font-size: 18px;
  color: var(--ivory);
  margin: 10px 0 8px;
}

.page-about .ab-team__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.88;
  color: rgba(244, 237, 224, 0.76);
}

.page-about .ab-prose {
  max-width: 70ch;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .prose p {
  margin: 0;
  font-size: 15px;
  line-height: 1.95;
  color: rgba(244, 237, 224, 0.8);
}

.page-about .ab-panels {
  border-top: 1px solid var(--line);
}

.page-about .panel {
  border-bottom: 1px solid var(--line);
  background: transparent;
}

.page-about .panel__head {
  cursor: pointer;
  list-style: none;
  padding: 16px 34px 16px 0;
  position: relative;
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--ivory);
  transition: color 180ms ease;
}

.page-about .panel__head::-webkit-details-marker {
  display: none;
}

.page-about .panel__head::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-num);
  font-size: 18px;
  color: var(--gold);
}

.page-about .panel[open] .panel__head {
  color: var(--gold-lt);
}

.page-about .panel[open] .panel__head::after {
  content: "−";
}

.page-about .panel__head:hover {
  color: var(--gold-lt);
}

.page-about .panel__body {
  padding: 0 0 18px;
  animation: ab-fade 220ms ease both;
}

.page-about .panel__body p {
  margin: 0;
  font-size: 14px;
  line-height: 1.95;
  color: rgba(244, 237, 224, 0.76);
  max-width: 66ch;
}

@keyframes ab-fade {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 合作生态 ---------- */
.page-about .ab-partners {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 4vw, 40px);
}

.page-about .ab-partners__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: flex-start;
  padding: 20px 16px;
  border: 1px solid var(--line);
  background:
    repeating-linear-gradient(0deg, rgba(212, 168, 87, 0.05) 0 1px, transparent 1px 46px),
    var(--ink-2);
}

.page-about .ab-partners__text h3 {
  font-size: 21px;
  color: var(--gold-lt);
  margin-bottom: 10px;
}

.page-about .ab-partners__text p {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.92;
  color: rgba(244, 237, 224, 0.78);
}

.page-about .ab-link {
  display: inline-block;
  color: var(--jade);
  text-decoration: none;
  font-size: 14px;
  border-bottom: 1px solid rgba(89, 184, 160, 0.4);
  padding-bottom: 2px;
}

.page-about .ab-link:hover {
  color: var(--gold-lt);
  border-bottom-color: var(--gold);
}

/* ---------- 到访 ---------- */
.page-about .ab-chapter--end {
  background:
    radial-gradient(90% 80% at 12% 100%, rgba(212, 168, 87, 0.12) 0%, rgba(10, 10, 11, 0) 62%),
    var(--ink);
}

.page-about .ab-visit {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 32px);
}

.page-about .ab-visit__card {
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: 0;
  padding: 22px 18px;
}

.page-about .ab-visit__card h3 {
  font-size: 19px;
  color: var(--gold-lt);
  margin-bottom: 14px;
}

.page-about .ab-visit__list {
  margin: 0;
  padding: 0;
}

.page-about .ab-visit__row {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 10px;
  padding: 11px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .ab-visit__row dt {
  font-size: 12.5px;
  color: var(--smoke);
  letter-spacing: 0.04em;
}

.page-about .ab-visit__row dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--ivory);
  word-break: break-word;
}

.page-about .ab-visit__row a {
  color: var(--jade);
  text-decoration: none;
}

.page-about .ab-visit__row a:hover {
  color: var(--gold-lt);
}

.page-about .ab-visit__note {
  margin: 14px 0 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--smoke);
  border-left: 2px solid var(--gold-dk);
  padding-left: 10px;
}

.page-about .ab-visit__links {
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .ab-visit__link {
  display: grid;
  grid-template-columns: 34px 1fr;
  grid-template-rows: auto auto;
  gap: 2px 12px;
  padding: 16px 16px;
  background: var(--ink-2);
  text-decoration: none;
  transition: background 180ms ease, padding-left 180ms ease;
}

.page-about .ab-visit__link:hover,
.page-about .ab-visit__link:focus-visible {
  background: var(--ink);
  padding-left: 22px;
}

.page-about .ab-visit__link .num {
  grid-row: 1 / span 2;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--gold-dk);
  align-self: start;
  padding-top: 2px;
}

.page-about .ab-visit__link strong {
  font-family: var(--font-serif);
  font-size: 16px;
  color: var(--gold-lt);
  font-weight: 700;
}

.page-about .ab-visit__link span:last-child {
  font-size: 13px;
  color: var(--smoke);
}

/* ---------- 平板 ---------- */
@media (min-width: 620px) {
  .page-about .ab-stats__grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

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

  .page-about .ab-visit__row {
    grid-template-columns: 88px 1fr;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .ab-hero {
    padding: 40px 0 clamp(52px, 5vw, 78px);
  }

  .page-about .ab-hero__inner {
    grid-template-columns: minmax(0, 1.72fr) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }

  .page-about .ab-hero__aside {
    border-left: 1px solid var(--line);
    padding-left: 24px;
    position: relative;
  }

  .page-about .ab-chapter__head {
    grid-template-columns: var(--ab-rail) minmax(0, 1fr);
    gap: clamp(20px, 3vw, 40px);
    align-items: start;
  }

  .page-about .ab-chapter__no {
    position: sticky;
    top: 96px;
    padding-top: 8px;
    border-top: 1px solid var(--line-strong);
  }

  .page-about .ab-timeline {
    padding-left: 42px;
    margin-left: calc(var(--ab-rail) + clamp(20px, 3vw, 40px));
    gap: 26px;
    max-width: 78ch;
  }

  .page-about .ab-tl__item::before {
    left: -48px;
  }

  .page-about .ab-tl__item:nth-child(even) {
    margin-left: clamp(18px, 4vw, 64px);
  }

  .page-about .ab-figure {
    margin: 8px 0 8px clamp(0px, 3vw, 44px);
    max-width: 460px;
  }

  .page-about .ab-spaces {
    grid-template-columns: repeat(6, 1fr);
    margin-left: calc(var(--ab-rail) + clamp(20px, 3vw, 40px));
  }

  .page-about .ab-space {
    grid-column: span 3;
    padding: 26px 24px;
  }

  .page-about .ab-space--lg {
    grid-column: span 4;
  }

  .page-about .ab-space--img {
    grid-column: span 2;
    grid-row: span 2;
  }

  .page-about .ab-wide-figure,
  .page-about .ab-svgplate {
    margin-left: calc(var(--ab-rail) + clamp(20px, 3vw, 40px));
  }

  .page-about .ab-team__grid,
  .page-about .ab-prose,
  .page-about .ab-panels,
  .page-about .ab-partners,
  .page-about .ab-visit {
    margin-left: calc(var(--ab-rail) + clamp(20px, 3vw, 40px));
  }

  .page-about .ab-partners {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }

  .page-about .ab-partners__tags {
    position: sticky;
    top: 96px;
    min-height: 220px;
  }

  .page-about .ab-visit {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-about .ab-stats__grid {
    grid-template-columns: repeat(5, 1fr);
  }

  .page-about .ab-stat {
    padding: 22px 16px 26px;
  }

  .page-about .ab-partners__text h3 {
    font-size: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .media img,
  .page-about .ab-tl__item,
  .page-about .ab-team__card,
  .page-about .tag,
  .page-about .ab-visit__link {
    transition: none;
  }

  .page-about .media:hover img {
    transform: none;
  }

  .page-about .panel__body {
    animation: none;
  }
}
<<<END>>>