.page-about {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: clip;
  background-image:
    repeating-linear-gradient(135deg, rgba(185, 137, 59, .05) 0 1px, transparent 1px 9px);
}

.page-about .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0 0 clamp(20px, 3vw, 34px);
  padding: 0;
  font-size: .86rem;
  color: var(--taupe);
}

.page-about .breadcrumb ol li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--bronze);
}

.page-about .breadcrumb a {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--bronze-pale);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  border-bottom-color: var(--cinnabar);
  color: var(--cinnabar);
}

/* 首屏 */
.page-about .about-mast {
  position: relative;
  padding: clamp(20px, 4vw, 44px) var(--gutter) clamp(30px, 5vw, 56px);
  border-bottom: 4px solid var(--ink);
}

.page-about .about-mast__inner {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: end;
}

.page-about .about-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .14em;
  color: var(--celadon-deep);
  border: 2px solid var(--bronze-pale);
  background: var(--paper-warm);
  padding: 6px 12px;
}

.page-about .about-mast h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 7vw, 4.4rem);
  line-height: 1.12;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-about .about-mast__intro {
  margin: 0 0 24px;
  max-width: 40em;
  font-size: clamp(1rem, 1.6vw, 1.08rem);
  line-height: 1.8;
  color: var(--ink-soft);
}

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

.page-about .about-mast__actions .btn {
  min-width: 180px;
  text-align: center;
}

.page-about .about-mast__fig {
  position: relative;
  margin: 0;
}

.page-about .about-mast__fig::before {
  content: "";
  position: absolute;
  inset: 12px -8px -12px 8px;
  background: var(--cinnabar);
}

.page-about .about-mast__fig img {
  position: relative;
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  clip-path: polygon(0 0, 100% 4%, 100% 100%, 0 96%);
}

.page-about .about-mast__fig figcaption {
  position: relative;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .16em;
  color: var(--taupe);
}

.page-about .about-facts {
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 16px 0 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  border-top: 2px solid var(--ink);
}

.page-about .about-facts__item {
  border-left: 3px solid var(--bronze);
  padding-left: 12px;
  min-width: 0;
}

.page-about .about-facts dt {
  font-size: .72rem;
  letter-spacing: .14em;
  color: var(--taupe);
}

.page-about .about-facts dd {
  margin: 5px 0 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1rem, 2.4vw, 1.2rem);
  color: var(--ink);
}

/* 主体框架 */
.page-about .about-frame {
  display: grid;
  gap: clamp(26px, 4vw, 54px);
  max-width: var(--max);
  margin-inline: auto;
  padding: clamp(30px, 5vw, 64px) var(--gutter) clamp(48px, 7vw, 96px);
}

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

.page-about .about-rail__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .2em;
  color: var(--cinnabar);
}

.page-about .about-rail__list {
  list-style: none;
  display: flex;
  gap: 8px;
  margin: 0 0 12px;
  padding: 0 0 4px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail__list li {
  flex: 0 0 auto;
}

.page-about .about-rail__list a {
  display: block;
  padding: 8px 12px;
  font-size: .88rem;
  color: var(--ink-soft);
  text-decoration: none;
  border: 2px solid var(--bronze-pale);
  background: var(--paper-warm);
  white-space: nowrap;
  transition: border-color .18s var(--ease), color .18s var(--ease);
}

.page-about .about-rail__list a:hover,
.page-about .about-rail__list a:focus-visible {
  border-color: var(--cinnabar);
  color: var(--cinnabar);
}

.page-about .about-rail__note {
  margin: 0;
  font-size: .82rem;
  line-height: 1.7;
  color: var(--taupe);
}

.page-about .about-flow {
  display: grid;
  gap: clamp(32px, 5vw, 64px);
  min-width: 0;
}

/* 章节通用 */
.page-about .about-chapter {
  min-width: 0;
  border-top: 3px solid var(--ink);
  padding-top: clamp(18px, 3vw, 28px);
}

.page-about .about-chapter h2 {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.55rem, 4.4vw, 2.5rem);
  line-height: 1.26;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-about .about-chapter p {
  margin: 0 0 14px;
  max-width: 70ch;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about p.about-chapter__no {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: .76rem;
  letter-spacing: .2em;
  color: var(--cinnabar);
}

.page-about .about-chapter__lede {
  font-size: clamp(1rem, 1.6vw, 1.06rem);
}

.page-about p.about-quote {
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: 16px 18px;
  border-left: 4px solid var(--cinnabar);
  background: var(--paper-warm);
  font-size: .94rem;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-about p.about-note {
  margin: 16px 0 0;
  font-size: .88rem;
  line-height: 1.72;
  color: var(--taupe);
  border-top: 1px dashed var(--bronze-pale);
  padding-top: 12px;
}

/* 板块结构 */
.page-about .about-map {
  margin: 20px 0 0;
  padding: clamp(16px, 3vw, 28px);
  background: var(--paper-warm);
  border: var(--line);
  box-shadow: var(--shadow-soft);
}

.page-about p.about-map__title {
  display: inline-block;
  margin: 0 0 14px;
  padding: 6px 14px;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .14em;
  line-height: 1.6;
}

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

.page-about .about-map__pills li {
  padding: 6px 14px;
  font-size: .88rem;
  font-weight: 700;
  color: var(--ink-soft);
  background: var(--paper);
  border: 2px solid var(--bronze);
}

.page-about .about-map__stem {
  height: 22px;
  margin: 0 0 14px 24px;
  border-left: 2px dashed var(--bronze);
}

.page-about .about-channels {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-channels li {
  min-width: 0;
  padding: 2px 0 2px 14px;
  border-left: 4px solid var(--cinnabar);
}

.page-about .about-channels h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.06rem;
  color: var(--ink);
}

.page-about .about-channels p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.72;
  color: var(--taupe);
}

/* 时间轴 */
.page-about .about-timeline {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
}

.page-about .about-timeline__item {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 10px;
  padding-bottom: 26px;
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline__year {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: .86rem;
  letter-spacing: -.01em;
  color: var(--cinnabar-deep);
  padding-top: 4px;
  word-break: break-word;
}

.page-about .about-timeline__body {
  position: relative;
  min-width: 0;
  padding: 0 0 4px 20px;
  border-left: 2px solid var(--bronze-pale);
}

.page-about .about-timeline__body::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 6px;
  width: 12px;
  height: 12px;
  background: var(--bronze-bright);
  border: 2px solid var(--ink);
  border-radius: 50%;
}

.page-about .about-timeline__body h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.08rem;
  color: var(--ink);
}

.page-about .about-timeline__body p {
  margin: 0;
  font-size: .94rem;
  line-height: 1.76;
  color: var(--ink-soft);
}

/* 团队 */
.page-about .about-team__fig {
  margin: 20px 0 24px;
  background: var(--paper-warm);
  border: var(--line);
  box-shadow: var(--shadow-soft);
}

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

.page-about .about-team__fig figcaption {
  padding: 9px 12px;
  border-top: 2px solid var(--ink);
  font-family: var(--font-mono);
  font-size: .74rem;
  line-height: 1.6;
  color: var(--taupe);
}

.page-about .about-team__roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-team__roles li {
  min-width: 0;
  padding: 14px 16px;
  background: var(--paper-warm);
  border: 2px solid var(--ink);
  transition: transform .18s var(--ease), box-shadow .18s var(--ease);
}

.page-about .about-team__roles li:hover {
  transform: translate(-3px, -3px);
  box-shadow: 6px 6px 0 var(--bronze);
}

.page-about .about-team__roles h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1rem;
  color: var(--cinnabar-deep);
}

.page-about .about-team__roles p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.72;
  color: var(--ink-soft);
}

/* 合作生态 */
.page-about .about-partners {
  background: var(--ink);
  color: var(--paper);
  border: 2px solid var(--ink);
  padding: clamp(20px, 4vw, 40px);
}

.page-about .about-partners .about-chapter__no {
  color: var(--bronze-bright);
}

.page-about .about-partners h2 {
  color: var(--paper-warm);
}

.page-about .about-partners p {
  color: var(--bronze-pale);
}

.page-about .about-partners__fig {
  margin: 20px 0 22px;
  border: 2px solid var(--bronze);
}

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

.page-about .about-scenes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-scenes li {
  min-width: 0;
  padding: 14px 16px;
  background: var(--ink-soft);
  border: 2px solid var(--bronze);
}

.page-about .about-scenes h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1rem;
  color: var(--bronze-bright);
}

.page-about .about-scenes p {
  margin: 0;
  font-size: .9rem;
  line-height: 1.74;
  color: var(--bronze-pale);
}

/* 数据 */
.page-about .about-numbers__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 20px 0 0;
}

.page-about .about-stat {
  min-width: 0;
  padding: 16px;
  background: var(--paper-warm);
  border: var(--line);
  box-shadow: 6px 6px 0 var(--bronze-pale);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.35rem, 3.4vw, 1.9rem);
  line-height: 1.2;
  color: var(--cinnabar);
  margin-bottom: 8px;
}

.page-about .about-stat__label {
  display: block;
  font-size: .84rem;
  line-height: 1.6;
  color: var(--taupe);
}

.page-about p.about-honor {
  display: inline-block;
  margin: 20px 0 0;
  padding: 10px 16px;
  background: var(--cinnabar);
  color: #fff;
  font-size: .9rem;
  font-weight: 700;
  line-height: 1.6;
  border: 2px solid var(--cinnabar-deep);
}

/* 下一步 */
.page-about .about-next__grid {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.page-about .about-next__card {
  display: block;
  min-width: 0;
  padding: 18px;
  background: var(--paper-warm);
  border: 2px solid var(--ink);
  color: var(--ink);
  text-decoration: none;
  transition: transform .18s var(--ease), box-shadow .18s var(--ease), border-color .18s var(--ease);
}

.page-about .about-next__card:hover,
.page-about .about-next__card:focus-visible {
  transform: translate(-4px, -4px);
  box-shadow: 8px 8px 0 var(--ink);
  border-color: var(--cinnabar);
}

.page-about .about-next__k {
  display: inline-block;
  margin-bottom: 10px;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--paper);
  background: var(--cinnabar-deep);
}

.page-about .about-next__card h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1.08rem;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .about-next__card p {
  margin: 0 0 12px;
  font-size: .9rem;
  line-height: 1.72;
  color: var(--taupe);
}

.page-about .about-next__go {
  font-size: .88rem;
  font-weight: 700;
  color: var(--cinnabar);
}

/* 平板及以上 */
@media (min-width: 620px) {
  .page-about .about-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

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

  .page-about .about-timeline__item {
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 18px;
  }

  .page-about .about-timeline__year {
    font-size: .92rem;
  }
}

@media (min-width: 900px) {
  .page-about .about-mast__inner {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    gap: clamp(32px, 5vw, 64px);
  }

  .page-about .about-mast__intro {
    font-size: 1.06rem;
  }

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

@media (min-width: 1000px) {
  .page-about .about-frame {
    grid-template-columns: 236px minmax(0, 1fr);
    align-items: start;
    gap: clamp(36px, 4vw, 64px);
  }

  .page-about .about-rail {
    position: sticky;
    top: 96px;
  }

  .page-about .about-rail__list {
    flex-direction: column;
    overflow: visible;
    gap: 0;
    padding: 0;
    border-top: 2px solid var(--ink);
  }

  .page-about .about-rail__list li {
    border-bottom: 1px solid var(--bronze-pale);
  }

  .page-about .about-rail__list a {
    border: 0;
    background: transparent;
    padding: 10px 4px 10px 12px;
    border-left: 3px solid transparent;
    white-space: normal;
    font-size: .9rem;
  }

  .page-about .about-rail__list a:hover,
  .page-about .about-rail__list a:focus-visible {
    border-left-color: var(--cinnabar);
    color: var(--cinnabar);
    background: var(--paper-warm);
  }

  .page-about .about-rail__note {
    margin-top: 16px;
    border-top: 1px dashed var(--bronze-pale);
    padding-top: 12px;
  }

  .page-about .about-mast__fig {
    transform: translateY(-8px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team__roles li,
  .page-about .about-next__card,
  .page-about .about-rail__list a {
    transition: none;
  }

  .page-about .about-team__roles li:hover,
  .page-about .about-next__card:hover,
  .page-about .about-next__card:focus-visible {
    transform: none;
  }

  .page-about .about-mast__fig {
    transform: none;
  }
}
<<<END>>>