.page-about {
  background: var(--paper);
  color: var(--char);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 28px 0 64px;
  background: linear-gradient(155deg, var(--ink-900) 0%, var(--ink-800) 62%, var(--ink-700) 100%);
  color: var(--paper);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(244, 239, 228, .055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(244, 239, 228, .055) 1px, transparent 1px);
  background-size: 96px 96px;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -120px;
  bottom: -160px;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 40%, rgba(216, 177, 90, .22), transparent 68%);
  pointer-events: none;
}

.page-about .about-hero > .container {
  position: relative;
  z-index: 1;
}

.page-about .about-hero .breadcrumb {
  margin-bottom: 26px;
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(34px, 6.4vw, 78px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-hero__lower {
  margin-top: 34px;
  display: grid;
  gap: 28px;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(244, 239, 228, .86);
  border-left: 2px solid var(--gold);
  padding-left: 18px;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  border-top: 1px solid var(--line-dark);
  padding-top: 22px;
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-hero__num {
  font-family: var(--mono);
  font-size: clamp(24px, 3.6vw, 34px);
  font-weight: 600;
  color: var(--gold-lite);
  line-height: 1.1;
}

.page-about .about-hero__num em {
  font-style: normal;
  font-size: .5em;
  margin-left: 2px;
  color: var(--gold);
}

.page-about .about-hero__cap {
  font-size: 12px;
  letter-spacing: .04em;
  color: rgba(244, 239, 228, .62);
}

/* ---------- 双栏壳体 ---------- */
.page-about .about-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding-block: 48px 72px;
}

/* ---------- 左侧章节索引 ---------- */
.page-about .about-index {
  display: flex;
  flex-direction: column;
  gap: 14px;
  border: 1px solid var(--line-light);
  border-radius: var(--radius-m);
  background: var(--paper-lift);
  padding: 18px 20px;
}

.page-about .about-index__head {
  margin: 0;
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 600;
  color: var(--ink-900);
  letter-spacing: .04em;
}

.page-about .about-index__head .font-mono {
  font-size: 11px;
  color: var(--cinnabar-deep);
  margin-right: 6px;
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
}

.page-about .about-index__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  font-size: 14px;
  color: var(--char);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color .15s var(--ease), border-color .15s var(--ease);
}

.page-about .about-index__no {
  font-size: 11px;
  color: var(--fog);
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  color: var(--ink-800);
  border-bottom-color: var(--gold);
}

.page-about .about-index__list a:hover .about-index__no,
.page-about .about-index__list a:focus-visible .about-index__no {
  color: var(--gold);
}

.page-about .about-index__cta {
  margin-top: 4px;
  font-size: 13px;
  color: var(--cinnabar-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
  align-self: flex-start;
}

/* ---------- 章节 ---------- */
.page-about .about-flow {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-about .about-sec {
  scroll-margin-top: calc(var(--status-h) + 28px);
  padding-block: 36px;
  border-top: 1px solid var(--line-light);
}

.page-about .about-sec:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-sec__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 20px;
}

.page-about .about-sec__no {
  font-size: 12px;
  color: var(--gold);
  letter-spacing: .1em;
  flex: none;
  padding-top: 6px;
}

.page-about .about-sec__title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: clamp(23px, 3.4vw, 34px);
  line-height: 1.35;
  color: var(--ink-900);
  letter-spacing: -0.005em;
}

.page-about .about-sec p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
  color: #33312b;
  max-width: 68ch;
}

.page-about .about-sec p:last-child {
  margin-bottom: 0;
}

.page-about .about-sec p a {
  color: var(--cinnabar-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-about .about-sec p a:hover {
  color: var(--ink-800);
  text-decoration-color: var(--gold);
}

/* ---------- 旁注 ---------- */
.page-about .about-note {
  margin: 22px 0 24px;
  padding: 16px 20px;
  background: var(--paper-dim);
  border-left: 2px solid var(--gold);
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
}

.page-about .about-note p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: #3f3b33;
  max-width: 62ch;
}

.page-about .about-note__label {
  display: block;
  margin-bottom: 7px;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--cinnabar-deep);
}

/* ---------- 图文错栏 ---------- */
.page-about .about-figure-row {
  display: grid;
  gap: 22px;
  margin-bottom: 8px;
}

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

.page-about .about-figure-row__media {
  margin: 0;
}

/* ---------- 设计原则列表 ---------- */
.page-about .about-principles {
  list-style: none;
  margin: 26px 0 22px;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line-light);
}

.page-about .about-principles__item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 12px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-light);
  transition: background-color .16s var(--ease);
}

.page-about .about-principles__item:hover {
  background: rgba(216, 177, 90, .08);
}

.page-about .about-principles__no {
  font-size: 13px;
  color: var(--ink-700);
  border: 1px solid var(--fog);
  border-radius: var(--pill);
  width: 30px;
  height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: border-color .16s var(--ease), color .16s var(--ease);
}

.page-about .about-principles__item:hover .about-principles__no {
  border-color: var(--gold);
  color: var(--cinnabar-deep);
}

.page-about .about-principles h3 {
  margin: 2px 0 6px;
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--ink-900);
}

.page-about .about-principles p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: #3f3b33;
}

/* ---------- 赛季深色带 ---------- */
.page-about .about-band {
  position: relative;
  margin: 6px 0 24px;
  padding: 28px 24px;
  border-radius: var(--radius-l);
  background: linear-gradient(150deg, var(--ink-900), var(--ink-800));
  color: var(--paper);
  overflow: hidden;
}

.page-about .about-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    115deg,
    rgba(216, 177, 90, .1) 0 1px,
    transparent 1px 26px
  );
  pointer-events: none;
}

.page-about .about-band > * {
  position: relative;
  z-index: 1;
}

.page-about .about-band__title {
  margin: 10px 0 12px;
  font-family: var(--serif);
  font-size: clamp(20px, 2.7vw, 26px);
  font-weight: 600;
  color: var(--gold-lite);
}

.page-about .about-band p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(244, 239, 228, .85);
  max-width: 56ch;
}

.page-about .season-steps {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .season-steps li {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 11px 14px;
  border: 1px solid var(--line-dark);
  border-radius: var(--pill);
  font-size: 15px;
  color: var(--paper);
  transition: border-color .16s var(--ease), background-color .16s var(--ease);
}

.page-about .season-steps li:hover {
  border-color: var(--gold);
  background: rgba(216, 177, 90, .1);
}

.page-about .season-steps .font-mono {
  font-size: 11px;
  color: var(--gold);
}

/* ---------- 团队 ---------- */
.page-about .about-team__media {
  margin: 22px 0 24px;
}

.page-about .about-team {
  list-style: none;
  margin: 0 0 8px;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-team li {
  padding: 18px 20px;
  background: var(--paper-lift);
  border: 1px solid var(--line-light);
  border-radius: var(--radius-m);
  transition: border-color .16s var(--ease);
}

.page-about .about-team li:hover {
  border-color: rgba(216, 177, 90, .7);
}

.page-about .about-team h3 {
  margin: 0 0 6px;
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 600;
  color: var(--ink-900);
}

.page-about .about-team p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: #3f3b33;
}

.page-about .about-team p a {
  color: var(--cinnabar-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 合作徽章墙 ---------- */
.page-about .about-partners__media {
  margin: 20px 0 24px;
}

.page-about .about-crests {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 24px;
}

.page-about .crest {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  aspect-ratio: 1 / 1;
  border: 1px solid var(--line-light);
  border-radius: 50%;
  background: var(--paper-lift);
  transition: border-color .16s var(--ease), background-color .16s var(--ease), transform .16s var(--ease);
}

.page-about .crest--org {
  border-radius: var(--radius-s);
  background: var(--paper-dim);
}

.page-about .crest:hover {
  border-color: var(--gold);
  background: #fffdf7;
}

.page-about .crest__no {
  font-size: 12px;
  color: var(--ink-700);
  letter-spacing: .06em;
}

.page-about .crest__tip {
  font-size: 10.5px;
  color: var(--cinnabar-deep);
  letter-spacing: .04em;
  white-space: nowrap;
}

/* ---------- 时间轴 ---------- */
.page-about .about-stages__intro {
  margin-bottom: 22px;
}

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-timeline__node {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  margin-bottom: 7px;
  border: 1px solid var(--gold);
  border-radius: 50%;
  background: var(--paper);
  font-size: 11px;
  color: var(--cinnabar-deep);
  transition: background-color .16s var(--ease), color .16s var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__node {
  background: var(--gold);
  color: var(--ink-900);
}

.page-about .about-stage {
  border: 1px solid var(--line-light);
  border-radius: var(--radius-m);
  background: var(--paper-lift);
  overflow: hidden;
  transition: border-color .16s var(--ease);
}

.page-about .about-stage[open] {
  border-color: rgba(216, 177, 90, .75);
}

.page-about .about-stage summary {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px;
  padding: 14px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 600;
  color: var(--ink-900);
}

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

.page-about .about-stage summary:focus-visible {
  outline: 2px solid var(--violet);
  outline-offset: -3px;
}

.page-about .about-stage__sub {
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: .06em;
  color: var(--cinnabar-deep);
  border-left: 1px solid var(--line-light);
  padding-left: 10px;
}

.page-about .about-stage p {
  margin: 0;
  padding: 0 18px 16px;
  font-size: 15px;
  line-height: 1.85;
  color: #3f3b33;
  max-width: 62ch;
}

/* ---------- 收束 ---------- */
.page-about .about-cta {
  background: linear-gradient(140deg, var(--ink-800), var(--ink-900));
  color: var(--paper);
  padding-block: 52px;
}

.page-about .about-cta__title {
  margin: 12px 0 14px;
  font-family: var(--serif);
  font-size: clamp(24px, 4vw, 40px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--paper);
  max-width: 20ch;
}

.page-about .about-cta__text {
  margin: 0 0 26px;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(244, 239, 228, .82);
  max-width: 56ch;
}

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

/* ---------- 窄屏收敛 ---------- */
@media (max-width: 420px) {
  .page-about .about-crests {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-hero__facts {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 720px) {
  .page-about .about-hero {
    padding: 36px 0 76px;
  }
  .page-about .about-hero__lower {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: end;
    gap: 40px;
    margin-top: 40px;
  }
  .page-about .about-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border-top: 0;
    padding-top: 0;
    border-left: 1px solid var(--line-dark);
    padding-left: 26px;
  }
  .page-about .about-crests {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .season-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-band {
    padding: 34px 32px;
  }
}

@media (min-width: 900px) {
  .page-about .about-shell {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 52px;
    padding-block: 64px 96px;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--status-h) + 24px);
    padding: 20px;
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 10px;
  }

  .page-about .about-sec {
    padding-block: 48px;
  }

  .page-about .about-figure-row {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
    align-items: start;
    gap: 32px;
    margin-bottom: 10px;
  }

  .page-about .about-figure-row__media {
    margin-top: 4px;
  }

  .page-about .about-principles__item {
    grid-template-columns: 60px minmax(0, 1fr);
    padding: 20px 0;
  }

  .page-about .about-note {
    margin-left: auto;
    max-width: 74%;
    padding: 18px 24px;
  }

  .page-about .about-timeline {
    gap: 22px;
    padding-block: 8px 18px;
    overflow: hidden;
  }

  .page-about .about-timeline::before {
    content: "";
    position: absolute;
    left: 0;
    top: 26px;
    width: 118%;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(216, 177, 90, .85) 10%, rgba(216, 177, 90, .85) 82%, transparent);
    transform: rotate(8.5deg);
    transform-origin: left center;
    pointer-events: none;
  }

  .page-about .about-timeline__item {
    position: relative;
    z-index: 1;
  }

  .page-about .about-timeline__item:nth-child(2) {
    margin-left: 10%;
  }

  .page-about .about-timeline__item:nth-child(3) {
    margin-left: 20%;
  }

  .page-about .about-timeline__item:nth-child(4) {
    margin-left: 30%;
  }

  .page-about .about-cta {
    padding-block: 72px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__list a,
  .page-about .about-principles__item,
  .page-about .about-principles__no,
  .page-about .season-steps li,
  .page-about .about-team li,
  .page-about .crest,
  .page-about .about-timeline__node,
  .page-about .about-stage {
    transition: none;
  }
}
<<<END>>>