.page-about {
  --about-inline: clamp(1.15rem, 4vw, 3.5rem);
  --about-pad-y: clamp(2.75rem, 6vw, 5.5rem);
  --about-gold-line: rgba(200, 164, 93, .4);
  --about-ink-line: rgba(16, 24, 32, .14);
  background: var(--deep);
  color: var(--warm);
  font-family: var(--sans);
  line-height: 1.75;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(1.5rem, 3vw, 2.5rem) var(--about-inline) clamp(2.5rem, 5vw, 4rem);
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(200, 164, 93, .22), transparent 62%),
    linear-gradient(180deg, var(--royal) 0%, var(--deep) 72%);
}

.page-about .about-hero__eyebrow {
  margin: clamp(1.25rem, 3vw, 2rem) 0 0;
  color: var(--gold-soft);
  letter-spacing: .22em;
}

.page-about .about-hero__title {
  margin: clamp(1rem, 2.5vw, 1.75rem) 0 0;
  font-family: var(--serif);
  font-weight: 700;
  line-height: .98;
  letter-spacing: -.03em;
}

.page-about .about-hero__name {
  display: block;
  font-size: clamp(2.6rem, 8.5vw, 6.5rem);
  color: var(--warm);
}

.page-about .about-hero__sub {
  display: block;
  margin-top: .75rem;
  font-family: var(--sans);
  font-size: clamp(.85rem, 1.8vw, 1.05rem);
  font-weight: 400;
  letter-spacing: .3em;
  color: var(--gold-soft);
}

.page-about .about-hero__lead {
  margin: clamp(1.5rem, 3vw, 2.25rem) 0 0;
  max-width: 60ch;
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-doors {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: .75rem;
  margin: clamp(2rem, 4vw, 3rem) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-doors__item {
  min-width: 0;
}

.page-about .about-doors__link {
  display: grid;
  gap: .3rem;
  height: 100%;
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: rgba(255, 255, 255, .035);
  color: var(--warm);
  text-decoration: none;
  transition: background .3s var(--ease), border-color .3s var(--ease), transform .3s var(--ease);
}

.page-about .about-doors__link:hover,
.page-about .about-doors__link:focus-visible {
  background: rgba(200, 164, 93, .13);
  border-color: var(--gold);
  transform: translateY(-3px);
}

.page-about .about-doors__num {
  font-family: var(--mono);
  font-size: .75rem;
  letter-spacing: .16em;
  color: var(--gold);
}

.page-about .about-doors__name {
  font-family: var(--serif);
  font-size: 1.15rem;
  font-weight: 600;
}

.page-about .about-doors__desc {
  font-size: .82rem;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 主体框架 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  background: var(--deep);
}

.page-about .about-index {
  position: sticky;
  top: 0;
  z-index: 4;
  padding: .65rem var(--about-inline);
  background: var(--royal);
  border-bottom: 1px solid var(--line);
  overflow-x: auto;
  overscroll-behavior-x: contain;
}

.page-about .about-index__caption {
  margin: 0 0 .4rem;
  font-family: var(--mono);
  font-size: .65rem;
  letter-spacing: .18em;
  color: var(--gold-soft);
  white-space: nowrap;
}

.page-about .about-index__nav ol {
  display: flex;
  gap: 1.1rem;
  margin: 0;
  padding: 0;
  list-style: none;
  white-space: nowrap;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: .4rem;
  padding: .25rem 0;
  font-size: .82rem;
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .25s var(--ease), border-color .25s var(--ease);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--gold-soft);
}

.page-about .about-index__link.is-current {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.page-about .about-index__num {
  font-family: var(--mono);
  font-size: .7rem;
  color: inherit;
  opacity: .8;
}

.page-about .about-flow {
  min-width: 0;
}

/* ---------- 章节 ---------- */
.page-about .about-section {
  padding: var(--about-pad-y) var(--about-inline);
  scroll-margin-top: 5rem;
}

.page-about .about-section--deep {
  background: var(--deep);
  color: var(--warm);
  border-top: 1px solid var(--line);
}

.page-about .about-section--royal {
  background: var(--royal);
  color: var(--warm);
}

.page-about .about-section--warm {
  background: var(--warm);
  color: var(--ink);
}

.page-about .about-section--mist {
  background: var(--blue-mist);
  color: var(--ink);
}

.page-about .about-head {
  display: flex;
  align-items: baseline;
  gap: clamp(.7rem, 2vw, 1.4rem);
  margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
  padding-bottom: .95rem;
  border-bottom: 1px solid var(--line);
}

.page-about .about-section--warm .about-head,
.page-about .about-section--mist .about-head {
  border-bottom-color: var(--about-ink-line);
}

.page-about .about-head__num {
  flex: none;
  font-family: var(--mono);
  font-size: .8rem;
  letter-spacing: .16em;
  color: var(--gold);
}

.page-about .about-section--warm .about-head__num,
.page-about .about-section--mist .about-head__num {
  color: #8A6A24;
}

.page-about .about-head__title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(1.5rem, 4vw, 2.5rem);
  line-height: 1.16;
  letter-spacing: -.02em;
}

.page-about .about-section__lead {
  max-width: 58ch;
  margin: 0 0 clamp(1.25rem, 3vw, 2rem);
  font-size: .98rem;
  color: inherit;
  opacity: .82;
}

.page-about .about-section p {
  max-width: 62ch;
}

.page-about .about-section--warm p,
.page-about .about-section--mist p {
  color: #222E3C;
}

.page-about .about-section--deep p,
.page-about .about-section--royal p {
  color: var(--mist);
}

/* ---------- 混合分栏 ---------- */
.page-about .about-split {
  display: grid;
  gap: clamp(1.25rem, 3.4vw, 2.75rem);
}

.page-about .about-split__text > p + p {
  margin-top: 1rem;
}

.page-about .about-figure {
  margin: 0;
  border-radius: var(--r-xl);
  overflow: hidden;
  background: var(--royal-mid);
  box-shadow: 0 24px 60px -32px rgba(5, 15, 31, .7);
}

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

.page-about .about-figure--panorama img {
  aspect-ratio: 16 / 10;
}

.page-about .about-figure--square img {
  aspect-ratio: 10 / 7;
}

/* ---------- 数字条 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: clamp(2rem, 4vw, 3rem) 0 0;
}

.page-about .about-stats__item {
  padding-top: .85rem;
  border-top: 1px solid var(--line);
  min-width: 0;
}

.page-about .about-stats dt {
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--mist);
}

.page-about .about-stats dd {
  margin: .3rem 0 0;
  font-family: var(--mono);
  font-size: clamp(1.4rem, 3.2vw, 2.1rem);
  line-height: 1.2;
  color: var(--gold-soft);
}

.page-about .about-stats dd small {
  margin-left: .3rem;
  font-family: var(--sans);
  font-size: .76rem;
  color: var(--mist);
}

/* ---------- 内容线 ---------- */
.page-about .about-lines {
  display: grid;
  gap: 0;
  margin: 1.4rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-lines li {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  column-gap: .8rem;
  row-gap: .2rem;
  padding: .9rem 0;
  border-bottom: 1px dashed var(--about-ink-line);
}

.page-about .about-lines__num {
  grid-row: 1 / span 2;
  font-family: var(--mono);
  font-size: .78rem;
  color: #8A6A24;
}

.page-about .about-lines__name {
  font-family: var(--serif);
  font-size: 1.05rem;
  color: var(--ink);
}

.page-about .about-lines__desc {
  grid-column: 2;
  font-size: .88rem;
  line-height: 1.7;
  color: #3A4655;
}

.page-about .about-note {
  margin-top: clamp(1.5rem, 3.2vw, 2.25rem);
  padding: 1.1rem 1.25rem;
  border-left: 2px solid var(--gold);
  border-radius: 0 var(--r-lg) var(--r-lg) 0;
  background: rgba(200, 164, 93, .13);
}

.page-about .about-note p {
  margin: 0;
  font-size: .95rem;
}

.page-about .about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-tags li {
  padding: .32rem .85rem;
  border: 1px solid var(--about-ink-line);
  border-radius: var(--r-pill);
  font-size: .8rem;
  color: #2A3644;
  background: rgba(255, 255, 255, .6);
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  margin-top: clamp(1.25rem, 3vw, 1.85rem);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: clamp(1.25rem, 3.4vw, 2.5rem);
}

.page-about .about-crew {
  display: grid;
  gap: 0;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-crew li {
  display: grid;
  grid-template-columns: 3.2rem minmax(0, 1fr);
  column-gap: .9rem;
  row-gap: .15rem;
  padding: .9rem 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-crew__num {
  grid-row: 1 / span 2;
  font-family: var(--mono);
  font-size: 1.45rem;
  line-height: 1.2;
  color: var(--gold);
}

.page-about .about-crew__label {
  font-family: var(--serif);
  font-size: 1rem;
  color: var(--warm);
}

.page-about .about-crew__desc {
  grid-column: 2;
  font-size: .86rem;
  line-height: 1.7;
}

.page-about .about-team__extra {
  margin-top: 1.1rem;
  font-size: .9rem;
  padding-left: .9rem;
  border-left: 1px solid var(--line);
}

/* ---------- 时间轴 ---------- */
.page-about .about-stages {
  position: relative;
  margin: clamp(1.5rem, 3vw, 2.25rem) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-stages::before {
  content: "";
  position: absolute;
  left: .3rem;
  top: .9rem;
  bottom: .9rem;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), rgba(200, 164, 93, .12));
}

.page-about .about-stages > li {
  position: relative;
  padding-left: 1.9rem;
}

.page-about .about-stages > li::before {
  content: "";
  position: absolute;
  left: .08rem;
  top: 1.25rem;
  width: .5rem;
  height: .5rem;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(200, 164, 93, .18);
}

.page-about .about-stage__summary {
  display: flex;
  align-items: baseline;
  gap: .7rem;
  padding: .9rem 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--serif);
  font-size: clamp(1.05rem, 2.2vw, 1.35rem);
  font-weight: 600;
  color: var(--ink);
  border-bottom: 1px solid var(--about-ink-line);
  transition: color .25s var(--ease);
}

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

.page-about .about-stage__summary:hover {
  color: #8A6A24;
}

.page-about .about-stage__summary::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--mono);
  font-size: 1.05rem;
  color: #8A6A24;
}

.page-about .about-stage[open] .about-stage__summary::after {
  content: "–";
}

.page-about .about-stage__num {
  flex: none;
  font-family: var(--mono);
  font-size: .78rem;
  font-weight: 500;
  letter-spacing: .12em;
  color: #8A6A24;
}

.page-about .about-stage__name {
  min-width: 0;
}

.page-about .about-stage__hint {
  flex: none;
  font-family: var(--mono);
  font-size: .72rem;
  font-weight: 400;
  letter-spacing: .08em;
  color: #667282;
}

.page-about .about-stage__text {
  margin: 0;
  padding: .9rem 0 1.2rem;
  max-width: 60ch;
  font-size: .92rem;
  line-height: 1.8;
}

/* ---------- 文档 ---------- */
.page-about .about-docs {
  display: grid;
  gap: clamp(1.5rem, 3.4vw, 2.75rem);
}

.page-about .about-docs__text p + p {
  margin-top: 1rem;
}

.page-about .about-docs__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: .9rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-docs__list li {
  display: grid;
  gap: .2rem;
  padding: 1rem 1.05rem;
  border-radius: var(--r-lg);
  background: rgba(255, 255, 255, .72);
  border: 1px solid rgba(18, 58, 107, .1);
  min-width: 0;
}

.page-about .about-docs__num {
  font-family: var(--mono);
  font-size: clamp(1.25rem, 2.6vw, 1.6rem);
  line-height: 1.2;
  color: #123A6B;
}

.page-about .about-docs__label {
  font-size: .78rem;
  line-height: 1.5;
  color: #3A4655;
}

/* ---------- 资质与联系 ---------- */
.page-about .about-honors {
  display: grid;
  gap: clamp(1.5rem, 3.4vw, 3rem);
}

.page-about .about-honors__list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-honors__list li {
  padding: 1rem 0 1.15rem;
  border-top: 1px solid var(--line);
  font-size: .92rem;
  line-height: 1.8;
}

.page-about .about-honors__tag {
  display: block;
  margin-bottom: .35rem;
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--gold);
}

.page-about .about-contact {
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background: rgba(255, 255, 255, .04);
}

.page-about .about-contact__title {
  margin: 0 0 .5rem;
  font-family: var(--serif);
  font-size: 1.2rem;
  color: var(--warm);
}

.page-about .about-contact__label {
  margin: 1rem 0 0;
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .16em;
  color: var(--gold-soft);
}

.page-about .about-contact__value {
  margin: .2rem 0 0;
  font-family: var(--mono);
  font-size: .92rem;
  line-height: 1.6;
  color: var(--warm);
  word-break: break-word;
}

.page-about .about-contact__note {
  margin: 1.1rem 0 0;
  font-size: .8rem;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 响应式 ---------- */
@media (min-width: 40rem) {
  .page-about .about-doors {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 56rem) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }

  .page-about .about-split--reverse {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
  }

  .page-about .about-split--reverse > .about-split__text {
    order: 2;
  }

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

  .page-about .about-team {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
    align-items: start;
  }

  .page-about .about-docs {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .8fr);
    align-items: start;
  }

  .page-about .about-honors {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: start;
  }
}

@media (min-width: 64rem) {
  .page-about .about-body {
    grid-template-columns: 12.5rem minmax(0, 1fr);
    align-items: start;
    max-width: calc(var(--page-max) + 12.5rem);
    margin-inline: auto;
  }

  .page-about .about-index {
    position: sticky;
    top: 0;
    padding: clamp(2.75rem, 5vw, 4.5rem) 1.25rem 2rem var(--about-inline);
    background: var(--deep);
    border-bottom: 0;
    overflow: visible;
    max-height: 100vh;
  }

  .page-about .about-index__caption {
    margin-bottom: .9rem;
    color: var(--gold);
  }

  .page-about .about-index__nav ol {
    display: grid;
    gap: .1rem;
    white-space: normal;
  }

  .page-about .about-index__link {
    padding: .42rem 0;
    border-bottom: 1px solid var(--line-soft);
    font-size: .84rem;
  }

  .page-about .about-index__link.is-current {
    border-bottom-color: var(--gold);
  }

  .page-about .about-section {
    scroll-margin-top: 2rem;
  }

  .page-about .about-section--deep:first-child {
    border-top: 0;
  }
}

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

  .page-about .about-doors__link:hover,
  .page-about .about-doors__link:focus-visible {
    transform: none;
  }
}
<<<END>>>