.page-about {
  --about-gap: clamp(1rem, 2.4vw, 1.75rem);
  --about-rule: rgba(17, 24, 39, .12);
  background: var(--page);
  color: var(--ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  padding-top: clamp(1rem, 3vw, 1.75rem);
  padding-bottom: clamp(.5rem, 2vw, 1rem);
}
.page-about .breadcrumbs__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-data);
  font-size: var(--fs-sm);
  letter-spacing: .05em;
  color: var(--ink-soft);
  text-transform: uppercase;
}
.page-about .breadcrumbs__link {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}
.page-about .breadcrumbs__link:hover {
  color: var(--green);
  border-bottom-color: var(--green);
}
.page-about .breadcrumbs__sep { color: rgba(75, 90, 107, .5); }
.page-about .breadcrumbs__item--current {
  color: var(--ink);
  font-weight: 600;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background:
    radial-gradient(110% 85% at 84% 4%, rgba(53, 185, 106, .20), transparent 62%),
    radial-gradient(90% 70% at 6% 96%, rgba(255, 107, 44, .14), transparent 60%),
    linear-gradient(170deg, var(--night) 8%, var(--stand) 100%);
  color: var(--frost);
  overflow: hidden;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(234, 244, 255, .05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(234, 244, 255, .05) 1px, transparent 1px);
  background-size: 68px 68px;
  pointer-events: none;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9), transparent 85%);
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 5vw, 3.5rem);
  align-items: center;
  padding-top: clamp(1.5rem, 4vw, 2.5rem);
  padding-bottom: clamp(2rem, 5vw, 3.5rem);
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-h1);
  line-height: .98;
  letter-spacing: .01em;
  margin: .6rem 0 0;
  color: #fff;
  text-wrap: balance;
}
.page-about .about-hero__lead {
  margin: 1.25rem 0 0;
  max-width: 46ch;
  font-size: 1.05rem;
  line-height: 1.8;
  color: rgba(234, 244, 255, .82);
}
.page-about .about-hero__actions {
  margin-top: 1.75rem;
}

.page-about .about-hero__figure {
  position: relative;
  margin: 0;
  background: var(--stand);
  border: 1px solid var(--line-dark);
  padding: 10px;
  box-shadow: var(--shadow);
}
.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.03);
}
.page-about .about-hero__caption {
  display: block;
  margin-top: .7rem;
  font-family: var(--font-data);
  font-size: .72rem;
  letter-spacing: .05em;
  color: rgba(234, 244, 255, .6);
}
.page-about .about-hero__stamp {
  position: absolute;
  top: -0.85rem;
  left: -0.85rem;
  transform: rotate(-4deg);
}

/* 首屏数据条 */
.page-about .about-figures {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 clamp(1.5rem, 4vw, 2.5rem);
  padding: 0;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}
.page-about .about-figures__item {
  background: rgba(20, 34, 56, .82);
  padding: 1rem 1.1rem 1.15rem;
}
.page-about .about-figures__label {
  font-family: var(--font-data);
  font-size: .7rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: rgba(234, 244, 255, .55);
  margin: 0 0 .4rem;
}
.page-about .about-figures__value {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.6rem, 4.4vw, 2.4rem);
  line-height: 1;
  color: var(--frost);
}
.page-about .about-figures__value .data-num {
  color: var(--green-hi);
  font-family: var(--font-data);
  font-weight: 600;
  font-size: .72em;
}

/* ---------- 赛事横带 ---------- */
.page-about .about-band {
  background: var(--green);
  color: #fff;
  padding-block: .55rem;
  overflow-x: auto;
  scrollbar-width: thin;
}
.page-about .about-band .band__list {
  display: flex;
  align-items: center;
  gap: .55rem;
  flex-wrap: nowrap;
  min-width: max-content;
}
.page-about .about-band .band__item {
  font-family: var(--font-data);
  font-size: .76rem;
  letter-spacing: .08em;
  padding: .35rem .7rem;
  border: 1px solid rgba(255, 255, 255, .4);
  color: rgba(255, 255, 255, .92);
  white-space: nowrap;
}
.page-about .about-band .band__item--on {
  background: var(--night);
  border-color: var(--night);
  color: var(--frost);
}

/* ---------- 章节跳转 ---------- */
.page-about .about-jump {
  background: var(--frost);
  border-bottom: 1px solid var(--about-rule);
}
.page-about .about-jump__list {
  display: flex;
  gap: .35rem 1.35rem;
  flex-wrap: wrap;
  padding-block: .85rem;
}
.page-about .about-jump__link {
  font-family: var(--font-data);
  font-size: .8rem;
  letter-spacing: .03em;
  color: var(--ink-soft);
  text-decoration: none;
  padding-bottom: .15rem;
  border-bottom: 2px solid transparent;
  transition: color .16s var(--ease), border-color .16s var(--ease);
}
.page-about .about-jump__link:hover { color: var(--ink); border-bottom-color: var(--green-hi); }
.page-about .about-jump__link[aria-current="true"] {
  color: var(--green);
  border-bottom-color: var(--green);
  font-weight: 600;
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  scroll-margin-top: 1.5rem;
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
}
.page-about .about-head {
  max-width: 62ch;
  margin-bottom: clamp(1.5rem, 4vw, 2.75rem);
}
.page-about .about-head__no {
  margin: 0 0 .5rem;
  font-family: var(--font-data);
  font-size: .74rem;
  letter-spacing: .22em;
  color: var(--signal);
}
.page-about .about-head .section__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-h2);
  line-height: 1.05;
  margin: 0;
  letter-spacing: .01em;
}
.page-about .about-head .section__lead {
  margin: .9rem 0 0;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--ink-soft);
}
.page-about .section--dark .about-head .section__lead { color: rgba(234, 244, 255, .74); }
.page-about .section--paper .about-head .section__lead { color: var(--ink-soft); }

/* ---------- 01 品牌起点 ---------- */
.page-about .about-origin {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
}
.page-about .about-origin__text p {
  margin: 0 0 1.1rem;
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--ink);
}
.page-about .about-origin__text p:last-child { margin-bottom: 0; }

.page-about .about-quote {
  background: var(--paper);
  border: 1px solid var(--about-rule);
  border-left: 4px solid var(--signal);
  padding: 1.35rem 1.4rem;
  align-self: start;
}
.page-about .about-quote__text {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.15rem;
  line-height: 1.6;
  color: var(--ink);
}
.page-about .about-quote__by {
  margin: .8rem 0 0;
  font-family: var(--font-data);
  font-size: .72rem;
  letter-spacing: .1em;
  color: var(--ink-soft);
}

/* ---------- 02 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}
.page-about .about-timeline__item {
  position: relative;
  background: rgba(20, 34, 56, .72);
  padding: 1.4rem 1.3rem 1.5rem;
  border-top: 3px solid transparent;
  transition: background .2s var(--ease), border-color .2s var(--ease);
}
.page-about .about-timeline__item:hover {
  background: rgba(31, 138, 76, .2);
  border-top-color: var(--green-hi);
}
.page-about .about-timeline__ver {
  display: inline-block;
  font-family: var(--font-data);
  font-weight: 600;
  font-size: .78rem;
  letter-spacing: .1em;
  padding: .2rem .5rem;
  background: var(--signal);
  color: var(--night);
  margin-bottom: .85rem;
}
.page-about .about-timeline__title {
  margin: 0 0 .55rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: var(--fs-h3);
  line-height: 1.25;
  color: var(--frost);
}
.page-about .about-timeline__body {
  margin: 0;
  font-size: .95rem;
  line-height: 1.78;
  color: rgba(234, 244, 255, .74);
}

/* ---------- 03 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 2.5rem);
  align-items: start;
}
.page-about .about-team__figure {
  margin: 0;
}
.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 4;
  object-fit: cover;
  border: 1px solid var(--about-rule);
  background: var(--stand);
}
.page-about .about-team .media-frame__caption {
  display: block;
  margin-top: .6rem;
  font-family: var(--font-data);
  font-size: .72rem;
  letter-spacing: .05em;
  color: var(--ink-soft);
}

.page-about .about-team__roles {
  display: grid;
  gap: var(--about-gap);
}
.page-about .about-role {
  position: relative;
  background: var(--frost);
  border: 1px solid var(--about-rule);
  padding: 1.2rem 1.3rem 1.35rem 1.3rem;
}
.page-about .about-role::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--green), var(--green-hi));
}
.page-about .about-role__title {
  margin: 0 0 .5rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--ink);
}
.page-about .about-role__body {
  margin: 0;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ---------- 04 合作生态 ---------- */
.page-about .about-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 2.5rem);
  align-items: start;
}
.page-about .about-partners__figure {
  margin: 0;
  background: var(--frost);
  border: 1px solid var(--about-rule);
  padding: 10px;
}
.page-about .about-partners__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}
.page-about .about-partners__caption {
  display: block;
  margin-top: .7rem;
  font-family: var(--font-data);
  font-size: .72rem;
  letter-spacing: .04em;
  color: var(--ink-soft);
}

.page-about .about-partners__list {
  display: grid;
  gap: 1px;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}
.page-about .about-partner {
  background: var(--frost);
  padding: 1.15rem 1.25rem 1.3rem;
}
.page-about .about-partner--honor {
  background: var(--night);
}
.page-about .about-partner--honor .about-partner__title { color: var(--frost); }
.page-about .about-partner--honor .about-partner__body { color: rgba(234, 244, 255, .74); }
.page-about .about-partner__num {
  margin: 0 0 .3rem;
  font-family: var(--font-data);
  font-weight: 600;
  font-size: 1.9rem;
  line-height: 1;
  color: var(--green);
}
.page-about .about-partner--honor .about-partner__num { color: var(--signal-soft); }
.page-about .about-partner__title {
  margin: 0 0 .45rem;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.08rem;
  color: var(--ink);
}
.page-about .about-partner__body {
  margin: 0;
  font-size: .93rem;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-about .about-partners__note {
  margin: clamp(1.25rem, 3vw, 2rem) 0 0;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .about-link {
  color: var(--green);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 138, 76, .35);
  transition: border-color .16s var(--ease), color .16s var(--ease);
}
.page-about .about-link:hover {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

/* ---------- 05 内容原则（手风琴） ---------- */
.page-about .about-principles {
  border-top: 1px solid var(--about-rule);
}
.page-about .principle {
  border-bottom: 1px solid var(--about-rule);
  background: transparent;
  transition: background .18s var(--ease);
}
.page-about .principle[open] { background: var(--frost); }
.page-about .principle__summary {
  display: flex;
  align-items: center;
  gap: .9rem;
  padding: 1.05rem .6rem 1.05rem .2rem;
  cursor: pointer;
  list-style: none;
}
.page-about .principle__summary::-webkit-details-marker { display: none; }
.page-about .principle__no {
  font-family: var(--font-data);
  font-size: .76rem;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--signal);
  min-width: 2.1rem;
}
.page-about .principle__title {
  flex: 1 1 auto;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.08rem;
  line-height: 1.4;
  color: var(--ink);
}
.page-about .principle__mark {
  position: relative;
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
}
.page-about .principle__mark::before,
.page-about .principle__mark::after {
  content: "";
  position: absolute;
  background: var(--green);
  transition: transform .2s var(--ease), opacity .2s var(--ease);
}
.page-about .principle__mark::before { left: 0; top: 7px; width: 16px; height: 2px; }
.page-about .principle__mark::after { left: 7px; top: 0; width: 2px; height: 16px; }
.page-about .principle[open] .principle__mark::after { transform: scaleY(0); opacity: 0; }

.page-about .principle__body {
  padding: 0 .6rem 1.35rem 3rem;
}
.page-about .principle__body p {
  margin: 0;
  font-size: .97rem;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 68ch;
}

/* ---------- 结尾引导 ---------- */
.page-about .about-next {
  position: relative;
  background:
    radial-gradient(100% 120% at 88% 0%, rgba(53, 185, 106, .18), transparent 58%),
    linear-gradient(200deg, var(--night), var(--stand));
  color: var(--frost);
  padding-block: clamp(2.5rem, 6vw, 4rem);
}
.page-about .about-next__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}
.page-about .about-next__title {
  margin: .5rem 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-h2);
  line-height: 1.03;
  color: #fff;
}
.page-about .about-next__lead {
  margin: 1rem 0 0;
  max-width: 52ch;
  font-size: 1rem;
  line-height: 1.82;
  color: rgba(234, 244, 255, .78);
}
.page-about .about-next__links {
  display: grid;
  gap: 1px;
  background: var(--line-dark);
  border: 1px solid var(--line-dark);
}
.page-about .about-next__link {
  display: block;
  background: rgba(20, 34, 56, .82);
  padding: 1rem 1.15rem;
  text-decoration: none;
  transition: background .18s var(--ease), transform .18s var(--ease);
}
.page-about .about-next__link:hover {
  background: rgba(31, 138, 76, .28);
  transform: translateX(4px);
}
.page-about .about-next__link-label {
  display: block;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.02rem;
  color: var(--frost);
}
.page-about .about-next__link-hint {
  display: block;
  margin-top: .25rem;
  font-family: var(--font-data);
  font-size: .74rem;
  letter-spacing: .04em;
  color: rgba(234, 244, 255, .58);
}

/* ---------- 显现动画 ---------- */
.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .24s var(--ease), transform .24s var(--ease);
}
.page-about [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
    padding-bottom: clamp(2.5rem, 5vw, 4rem);
  }
  .page-about .about-origin {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, .85fr);
    gap: clamp(1.75rem, 4vw, 3rem);
  }
  .page-about .about-team {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
  }
  .page-about .about-partners {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  }
  .page-about .about-next__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  }
}

@media (min-width: 1040px) {
  .page-about .about-timeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1180px) {
  .page-about .about-head {
    display: grid;
    grid-template-columns: 4.5rem minmax(0, 1fr);
    column-gap: 1.5rem;
    max-width: none;
  }
  .page-about .about-head__no {
    grid-row: 1 / span 2;
    margin-top: .35rem;
    writing-mode: vertical-rl;
    letter-spacing: .3em;
  }
  .page-about .about-head .section__title { grid-column: 2; }
  .page-about .about-head .section__lead { grid-column: 2; max-width: 58ch; }
  .page-about .about-quote { padding: 1.75rem 1.6rem; }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .page-about .about-next__link:hover { transform: none; }
}
```