.page-about {
  --ab-aside: 156px;
  --ab-ink-soft: rgba(18, 16, 15, .76);
  --ab-gold-line: rgba(232, 207, 138, .45);
  background: var(--porcelain);
  color: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(1.25rem, 3vw, 2rem) 0 clamp(3rem, 7vw, 5rem);
  background: linear-gradient(158deg, var(--wine-deep) 0%, var(--wine) 40%, var(--wine-deep) 76%, var(--ink) 100%);
  color: var(--porcelain);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(58% 66% at 82% 14%, rgba(201, 162, 39, .24), transparent 62%),
    radial-gradient(46% 56% at 10% 88%, rgba(94, 116, 115, .22), transparent 70%);
  pointer-events: none;
}

.page-about .about-hero__diagonal {
  position: absolute;
  inset: auto -18% 0 -18%;
  height: 48%;
  z-index: -1;
  background: linear-gradient(104deg, rgba(43, 7, 17, 0) 0 46%, rgba(43, 7, 17, .8) 46% 100%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
}

.page-about .about-hero .breadcrumb__link,
.page-about .about-hero .breadcrumb__sep {
  color: rgba(246, 241, 231, .68);
}

.page-about .about-hero .breadcrumb__link:hover {
  color: var(--gold-light);
}

.page-about .about-hero .breadcrumb__current {
  color: var(--gold-light);
}

.page-about .about-hero .eyebrow {
  margin-top: clamp(1.5rem, 4vw, 2.75rem);
  color: var(--gold-light);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: end;
}

.page-about .about-hero__title {
  margin: .7rem 0 0;
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(1.95rem, 5.2vw, 3.4rem);
  line-height: 1.2;
  letter-spacing: .02em;
  max-width: 24ch;
}

.page-about .about-hero__lead {
  margin: 1.1rem 0 0;
  max-width: 48ch;
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(246, 241, 231, .82);
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: .85rem 1.85rem;
  margin: 1.85rem 0 0;
  padding: 1.1rem 0 0;
  list-style: none;
  border-top: 1px solid rgba(232, 207, 138, .26);
}

.page-about .about-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: .4rem;
}

.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--gold-light);
  line-height: 1;
}

.page-about .about-hero__unit {
  font-size: .8rem;
  letter-spacing: .04em;
  color: rgba(246, 241, 231, .68);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.85rem;
}

.page-about .about-hero .btn--ghost {
  border-color: var(--ab-gold-line);
  color: var(--porcelain);
}

.page-about .about-hero .btn--ghost:hover,
.page-about .about-hero .btn--ghost:focus-visible {
  border-color: var(--gold-light);
  background: rgba(232, 207, 138, .12);
  color: var(--porcelain);
}

.page-about .about-hero__figure {
  margin: 0;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 3;
  object-fit: cover;
  border: 1px solid var(--ab-gold-line);
  box-shadow: 0 18px 40px -28px rgba(0, 0, 0, .9);
}

.page-about .about-hero__figure .figure__caption {
  margin-top: .75rem;
  font-size: .78rem;
  letter-spacing: .04em;
  color: rgba(232, 207, 138, .72);
}

/* ---------- 长卷骨架 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  padding-bottom: clamp(1rem, 3vw, 2rem);
}

.page-about .about-index {
  padding: .25rem 0 1rem;
  border-bottom: 1px solid var(--line);
}

.page-about .about-index__title {
  margin: 1.25rem 0 .6rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--gold-muted);
}

.page-about .about-index__list {
  display: flex;
  gap: .4rem;
  margin: 0;
  padding: 0 0 .35rem;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  min-height: 44px;
  padding: .45rem .8rem;
  border: 1px solid var(--line);
  color: var(--ink);
  font-size: .875rem;
  letter-spacing: .02em;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color .25s var(--ease), color .25s var(--ease), background-color .25s var(--ease);
}

.page-about .about-index__num {
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--gold-muted);
}

.page-about .about-index__link.is-active {
  border-color: var(--gold);
  background: rgba(201, 162, 39, .1);
  color: var(--wine);
}

.page-about .about-index__link.is-active .about-index__num {
  color: var(--wine);
}

/* ---------- 章节 ---------- */
.page-about .about-chapters {
  min-width: 0;
}

.page-about .about-chapter {
  position: relative;
  padding: clamp(2rem, 5vw, 3.5rem) 0;
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-about .about-chapter + .about-chapter::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 6px;
  background: linear-gradient(90deg, var(--wine) 0%, var(--amber) 46%, var(--teal) 100%);
  opacity: .9;
}

.page-about .about-chapter:nth-of-type(4)::before {
  background: linear-gradient(90deg, var(--teal) 0%, var(--amber) 62%, var(--gold-light) 100%);
}

.page-about .about-chapter:nth-of-type(5)::before {
  background: linear-gradient(90deg, var(--teal-deep) 0%, var(--teal) 54%, var(--gold) 100%);
}

.page-about .about-chapter__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .5rem .85rem;
  align-items: start;
  margin-bottom: .9rem;
}

.page-about .about-chapter__num {
  font-family: var(--font-mono);
  font-size: .8rem;
  letter-spacing: .08em;
  color: var(--gold);
  padding-top: .5rem;
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.45rem, 3.4vw, 2.15rem);
  line-height: 1.26;
  letter-spacing: .01em;
  color: var(--wine);
}

.page-about .about-chapter__lead {
  margin: 0;
  max-width: 54ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--ab-ink-soft);
}

/* ---------- 三层秩序 ---------- */
.page-about .order-list {
  margin: 1.6rem 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .order-item {
  display: grid;
  gap: .35rem;
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .order-item__num {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 600;
  line-height: 1;
  color: var(--gold);
}

.page-about .order-item__name {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .order-item__text {
  margin: .45rem 0 0;
  max-width: 52ch;
  font-size: .95rem;
  line-height: 1.85;
  color: var(--ab-ink-soft);
}

.page-about .order-item__aside {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--teal);
}

.page-about .order-item__aside a {
  color: var(--wine);
  text-decoration: underline;
  text-decoration-color: rgba(201, 162, 39, .6);
  text-underline-offset: 3px;
}

.page-about .order-item__aside a:hover {
  color: var(--amber);
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: 1px;
  margin-top: 1.75rem;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .team-cell {
  padding: 1.2rem 1.2rem 1.45rem;
  background: var(--paper);
}

.page-about .team-cell__index {
  display: block;
  margin-bottom: .45rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .1em;
  color: var(--gold-muted);
}

.page-about .team-cell__name {
  margin: 0 0 .4rem;
  font-family: var(--font-serif);
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--wine);
}

.page-about .team-cell__text {
  margin: 0;
  font-size: .92rem;
  line-height: 1.8;
  color: var(--ab-ink-soft);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 1.75rem 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
}

.page-about .about-figure--banner img {
  aspect-ratio: 8 / 3;
  object-fit: cover;
}

.page-about .about-figure figcaption {
  margin-top: .65rem;
  font-size: .78rem;
  letter-spacing: .03em;
  color: var(--gold-muted);
}

/* ---------- 时间线折叠 ---------- */
.page-about .about-timeline {
  margin-top: 1.75rem;
  border-top: 1px solid var(--ink);
}

.page-about .about-timeline .accordion__item {
  border-bottom: 1px solid var(--line);
}

.page-about .about-timeline .accordion__title {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-about .about-timeline .accordion__trigger {
  display: flex;
  align-items: center;
  gap: .85rem;
  width: 100%;
  min-height: 56px;
  padding: .85rem 0;
  background: none;
  border: 0;
  font: inherit;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
}

.page-about .timeline-year {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .04em;
  color: var(--wine);
}

.page-about .timeline-label {
  flex: 1 1 auto;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.5;
  color: var(--ink);
}

.page-about .about-timeline .accordion__icon {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-right: .35rem;
  border-right: 1.5px solid var(--gold);
  border-bottom: 1.5px solid var(--gold);
  transform: rotate(45deg);
  transition: transform .2s var(--ease);
}

.page-about .about-timeline .accordion__trigger[aria-expanded="true"] .accordion__icon {
  transform: rotate(-135deg);
}

.page-about .about-timeline .accordion__trigger:hover .timeline-label {
  color: var(--wine);
}

.page-about .about-timeline .accordion__body {
  max-width: 60ch;
  padding: 0 0 1.1rem 0;
  font-size: .94rem;
  line-height: 1.85;
  color: var(--ab-ink-soft);
}

/* ---------- 准则 ---------- */
.page-about .principles {
  display: grid;
  gap: 1.6rem;
  margin-top: 1.75rem;
}

.page-about .principle {
  position: relative;
  padding-left: 3rem;
}

.page-about .principle__num {
  position: absolute;
  left: 0;
  top: .1rem;
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--gold);
  line-height: 1;
}

.page-about .principle__title {
  margin: 0 0 .35rem;
  font-family: var(--font-serif);
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .principle__text {
  margin: 0;
  max-width: 56ch;
  font-size: .95rem;
  line-height: 1.85;
  color: var(--ab-ink-soft);
}

.page-about .about-quote {
  margin: 2.25rem 0 0;
  max-width: 38ch;
  padding: .3rem 0 .3rem 1.2rem;
  border-left: 3px solid var(--gold-light);
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(1.05rem, 2.4vw, 1.35rem);
  line-height: 1.75;
  color: var(--wine);
}

.page-about .about-quote cite {
  display: block;
  margin-top: .7rem;
  font-family: var(--font-sans);
  font-style: normal;
  font-size: .76rem;
  letter-spacing: .1em;
  color: var(--gold-muted);
}

/* ---------- 合作与荣誉 ---------- */
.page-about .partner-badges {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  margin: 1.6rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .partner-badge {
  flex: 1 1 230px;
  min-height: 44px;
  padding: .85rem 1rem;
  border: 1px solid var(--line);
  background: var(--paper);
  transition: border-color .25s var(--ease), transform .25s var(--ease), background-color .25s var(--ease);
}

.page-about .partner-badge__name {
  display: block;
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--teal-deep);
}

.page-about .partner-badge__note {
  display: block;
  margin-top: .35rem;
  font-size: .82rem;
  line-height: 1.65;
  color: rgba(18, 16, 15, .66);
  transition: color .25s var(--ease);
}

.page-about .partner-badge:hover,
.page-about .partner-badge:focus-visible {
  border-color: var(--gold);
  background: #ffffff;
  transform: translateY(-2px);
  outline: none;
}

.page-about .partner-badge:hover .partner-badge__note,
.page-about .partner-badge:focus-visible .partner-badge__note {
  color: var(--wine);
}

.page-about .partner-badge:focus-visible {
  box-shadow: 0 0 0 2px rgba(201, 162, 39, .55);
}

.page-about .award-block {
  display: grid;
  gap: .9rem;
  margin-top: 2rem;
  padding: 1.25rem 1.3rem;
  border: 1px solid var(--line);
  background: linear-gradient(135deg, rgba(94, 116, 115, .12), rgba(201, 162, 39, .1));
}

.page-about .award-block__row {
  display: grid;
  gap: .25rem;
}

.page-about .award-block__label {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .12em;
  color: var(--teal);
}

.page-about .award-block__value {
  font-size: .93rem;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 尾声 ---------- */
.page-about .about-close {
  margin-top: clamp(1rem, 3vw, 2rem);
  padding: clamp(2.25rem, 5.5vw, 4rem) 0;
  background: linear-gradient(142deg, var(--wine-deep) 0%, var(--wine) 58%, var(--teal-deep) 100%);
  color: var(--porcelain);
}

.page-about .about-close__inner {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-about .about-close .eyebrow {
  color: var(--gold-light);
}

.page-about .about-close__title {
  margin: .6rem 0 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.8vw, 2.3rem);
  line-height: 1.28;
  color: var(--porcelain);
}

.page-about .about-close__text {
  margin: 1rem 0 0;
  max-width: 48ch;
  font-size: .97rem;
  line-height: 1.85;
  color: rgba(246, 241, 231, .82);
}

.page-about .about-close__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.6rem;
}

.page-about .about-close .btn--ghost {
  border-color: var(--ab-gold-line);
  color: var(--porcelain);
}

.page-about .about-close .btn--ghost:hover,
.page-about .about-close .btn--ghost:focus-visible {
  border-color: var(--gold-light);
  background: rgba(232, 207, 138, .12);
  color: var(--porcelain);
}

.page-about .about-close__contact {
  padding-top: 1.25rem;
  border-top: 1px solid rgba(232, 207, 138, .3);
}

.page-about .about-close__contact-title {
  margin: 0 0 .9rem;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--gold-light);
}

.page-about .about-close__contact-item {
  margin: 0 0 .7rem;
  font-size: .92rem;
  line-height: 1.7;
}

.page-about .about-close__contact-label {
  display: block;
  font-size: .72rem;
  letter-spacing: .08em;
  color: rgba(246, 241, 231, .6);
}

.page-about .about-close__contact-item a {
  color: var(--porcelain);
  text-decoration: underline;
  text-decoration-color: rgba(232, 207, 138, .55);
  text-underline-offset: 3px;
  word-break: break-all;
}

.page-about .about-close__contact-item a:hover {
  color: var(--gold-light);
}

.page-about .about-close__contact-note {
  margin: .9rem 0 0;
  max-width: 34ch;
  font-size: .8rem;
  line-height: 1.75;
  color: rgba(246, 241, 231, .62);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1fr) minmax(200px, 270px);
  }

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

  .page-about .award-block__row {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 1rem;
    align-items: baseline;
  }

  .page-about .about-close__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .9fr);
    align-items: start;
  }

  .page-about .about-close__contact {
    border-top: 0;
    border-left: 1px solid rgba(232, 207, 138, .3);
    padding-top: 0;
    padding-left: clamp(1.25rem, 3vw, 2rem);
  }
}

@media (min-width: 820px) {
  .page-about .order-item {
    grid-template-columns: 56px minmax(0, 1fr) 168px;
    gap: .35rem 1.25rem;
    align-items: start;
  }

  .page-about .order-item__aside {
    padding-top: .35rem;
    text-align: right;
  }

  .page-about .about-timeline .accordion__body {
    padding-left: 6.6rem;
  }

  .page-about .principles {
    gap: 1.8rem;
  }
}

@media (min-width: 1000px) {
  .page-about .about-layout {
    grid-template-columns: var(--ab-aside) minmax(0, 1fr);
    column-gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-about .about-index {
    padding: 0;
    border-bottom: 0;
    align-self: stretch;
  }

  .page-about .about-index__inner {
    position: sticky;
    top: calc(var(--header-h) + 1.75rem);
  }

  .page-about .about-index__title {
    margin-top: clamp(2.5rem, 5vw, 3.5rem);
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: .1rem;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .about-index__link {
    width: 100%;
    border: 0;
    border-left: 1px solid var(--line);
    padding: .55rem .75rem;
    justify-content: flex-start;
  }

  .page-about .about-index__link:hover {
    border-left-color: var(--gold);
    color: var(--wine);
  }

  .page-about .about-index__link.is-active {
    border-left-color: var(--gold);
    border-left-width: 2px;
    background: rgba(201, 162, 39, .1);
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1fr) minmax(230px, 300px);
    gap: clamp(2.5rem, 5vw, 4.5rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__link,
  .page-about .partner-badge,
  .page-about .partner-badge__note,
  .page-about .about-timeline .accordion__icon {
    transition: none;
  }

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