.page-about {
  --about-rail: 216px;
  --about-glow: radial-gradient(circle at 50% 50%, rgba(122, 92, 255, .34), rgba(53, 214, 200, .12) 48%, transparent 72%);
  display: block;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  margin-top: calc(var(--baseline) * 2);
  padding: clamp(26px, 5vw, 60px) clamp(20px, 4vw, 56px);
  background: linear-gradient(180deg, rgba(10, 16, 36, .94) 0%, rgba(4, 6, 14, .78) 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -46%;
  right: -18%;
  width: min(620px, 82%);
  aspect-ratio: 1 / 1;
  background: var(--about-glow);
  filter: blur(70px);
  opacity: .75;
  pointer-events: none;
}

.page-about .about-hero > * {
  position: relative;
}

.page-about .about-hero h1 {
  font-family: var(--font-head);
  font-size: clamp(28px, 4.6vw, 54px);
  line-height: 1.12;
  letter-spacing: -.02em;
  font-weight: 700;
  color: var(--warm);
  margin: calc(var(--baseline) * 1.5) 0 0;
  max-width: 19ch;
}

.page-about .about-hero .lede {
  margin: calc(var(--baseline) * 2.5) 0 0;
  max-width: 64ch;
  color: var(--mist);
  font-size: 17px;
  line-height: 1.75;
}

.page-about .about-figures {
  list-style: none;
  margin: calc(var(--baseline) * 4) 0 0;
  padding: 1px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-figures li {
  background: var(--panel);
  padding: 14px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .about-figures .num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 600;
  color: var(--gold);
  letter-spacing: -.01em;
  line-height: 1.1;
}

.page-about .about-figures__label {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--mist);
}

.page-about .about-hero .cta-row {
  margin-top: calc(var(--baseline) * 4);
}

/* ---------- 出发点 ---------- */
.page-about .about-origin__text h2,
.page-about .about-team__grid h2,
.page-about .about-reach h2,
.page-about .about-partnering h2 {
  font-family: var(--font-head);
  font-size: clamp(23px, 3vw, 32px);
  line-height: 1.25;
  letter-spacing: -.02em;
  color: var(--warm);
  margin: calc(var(--baseline)) 0 0;
  max-width: 22ch;
}

.page-about .about-origin__text p {
  color: var(--mist);
  margin: calc(var(--baseline) * 2) 0 0;
  line-height: 1.75;
}

.page-about .about-points {
  list-style: none;
  margin: calc(var(--baseline) * 3) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-points li {
  position: relative;
  padding-left: 24px;
  color: var(--mist);
  line-height: 1.7;
  font-size: 15px;
}

.page-about .about-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 13px;
  height: 1px;
  background: var(--cyan);
}

.page-about .about-points strong {
  color: var(--warm);
  font-weight: 600;
}

.page-about .about-origin__media {
  margin: calc(var(--baseline) * 3) 0 0;
}

/* ---------- 图片容器 ---------- */
.page-about .media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 28% 18%, rgba(122, 92, 255, .22), transparent 62%),
    var(--panel);
}

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

.page-about .media-frame__caption {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mist);
  padding: 10px 12px 12px;
  border-top: 1px solid var(--line);
}

/* ---------- 版本轨道 ---------- */
.page-about .about-track {
  margin-top: calc(var(--baseline) * 4);
  display: grid;
  gap: calc(var(--baseline) * 3);
}

.page-about .about-track__rail ol {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-track__rail ol::-webkit-scrollbar {
  display: none;
}

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

.page-about .about-track__rail a {
  display: block;
  white-space: nowrap;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .05em;
  color: var(--mist);
  text-decoration: none;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-about .about-track__rail a:hover {
  color: var(--warm);
  border-color: rgba(53, 214, 200, .5);
}

.page-about .about-track__rail a[aria-current="true"] {
  color: var(--warm);
  background: rgba(122, 92, 255, .16);
  border-color: rgba(122, 92, 255, .62);
}

.page-about .about-versions__media {
  margin: 0 0 calc(var(--baseline) * 3);
}

.page-about .about-version {
  scroll-margin-top: calc(var(--baseline) * 16);
  padding: clamp(20px, 3vw, 30px) clamp(18px, 3vw, 30px);
  border: 1px solid var(--line);
  border-left: 2px solid rgba(122, 92, 255, .5);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(18, 26, 49, .92) 0%, rgba(10, 16, 36, .68) 100%);
}

.page-about .about-version + .about-version {
  margin-top: calc(var(--baseline) * 2);
}

.page-about .about-version__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.page-about .about-version__no {
  font-size: 13px;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: .1em;
  padding: 2px 8px;
  border: 1px solid rgba(227, 195, 107, .4);
  border-radius: var(--radius);
  flex: 0 0 auto;
}

.page-about .about-version h3 {
  font-family: var(--font-head);
  font-size: 19px;
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--warm);
  margin: 0;
}

.page-about .about-version p {
  margin: calc(var(--baseline) * 1.5) 0 0;
  color: var(--mist);
  line-height: 1.75;
  font-size: 16px;
}

.page-about .about-version .about-version__note {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--purple-soft);
  padding-top: calc(var(--baseline) * 1.5);
  border-top: 1px dashed var(--line);
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  align-items: start;
}

.page-about .about-team__grid > div > p {
  color: var(--mist);
  margin: calc(var(--baseline) * 2) 0 0;
  line-height: 1.75;
}

.page-about .about-team__list {
  list-style: none;
  margin: calc(var(--baseline) * 3) 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-team__list li {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-about .about-team__no {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan);
  padding-top: 4px;
}

.page-about .about-team__list h3 {
  font-family: var(--font-head);
  font-size: 18px;
  letter-spacing: -.01em;
  color: var(--warm);
  margin: 0;
}

.page-about .about-team__list p {
  margin: 8px 0 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.7;
}

.page-about .about-team__media {
  margin: calc(var(--baseline) * 3) 0 0;
}

/* ---------- 覆盖 ---------- */
.page-about .about-cover {
  list-style: none;
  margin: calc(var(--baseline) * 4) 0 0;
  padding: 1px;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-cover li {
  background: var(--panel);
  padding: clamp(18px, 3vw, 26px);
}

.page-about .about-cover__key {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--cyan);
  margin: 0 0 10px;
  text-transform: uppercase;
}

.page-about .about-cover p + p {
  margin: 0;
  color: var(--mist);
  line-height: 1.75;
}

/* ---------- 合作 ---------- */
.page-about .about-partners {
  list-style: none;
  margin: calc(var(--baseline) * 4) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-partners li {
  display: flex;
}

.page-about .about-partner {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--deep);
  color: inherit;
  text-decoration: none;
  overflow: hidden;
  transition: border-color .3s var(--ease), transform .3s var(--ease);
}

.page-about .about-partner::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--grad);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .5s var(--ease);
}

.page-about .about-partner:hover,
.page-about .about-partner:focus-visible {
  border-color: rgba(122, 92, 255, .6);
  transform: translateY(-2px);
}

.page-about .about-partner:hover::after,
.page-about .about-partner:focus-visible::after {
  transform: scaleX(1);
}

.page-about .about-partner__no {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--purple-soft);
}

.page-about .about-partner h3 {
  font-family: var(--font-head);
  font-size: 19px;
  letter-spacing: -.01em;
  color: var(--warm);
  margin: 0;
}

.page-about .about-partner__hint {
  margin: 0;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.65;
}

.page-about .about-partnering__cta {
  margin-top: calc(var(--baseline) * 4);
}

/* ---------- 后续入口 ---------- */
.page-about .about-next__frame {
  padding: clamp(22px, 4vw, 44px) clamp(20px, 4vw, 48px);
  background: linear-gradient(135deg, rgba(122, 92, 255, .1), rgba(53, 214, 200, .07));
}

.page-about .about-next__frame h2 {
  font-family: var(--font-head);
  font-size: clamp(22px, 2.6vw, 28px);
  letter-spacing: -.02em;
  color: var(--warm);
  margin: 0;
}

.page-about .about-next__links {
  list-style: none;
  margin: calc(var(--baseline) * 3) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-next__links a {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  background: rgba(4, 6, 14, .72);
  text-decoration: none;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.6;
  transition: background .25s var(--ease), color .25s var(--ease);
}

.page-about .about-next__links a:hover {
  background: rgba(122, 92, 255, .14);
  color: var(--warm);
}

.page-about .about-next__links .mono {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-partners {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-cover {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-origin__grid,
  .page-about .about-team__grid {
    align-items: start;
  }

  .page-about .about-origin__media,
  .page-about .about-team__media {
    margin-top: 0;
  }

  .page-about .about-track {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .about-track__rail {
    position: sticky;
    top: calc(var(--header-panel-top) + 20px);
    align-self: start;
  }

  .page-about .about-track__rail ol {
    display: block;
    padding: 0 0 0 20px;
    overflow: visible;
    position: relative;
  }

  .page-about .about-track__rail ol::before {
    content: "";
    position: absolute;
    left: 6px;
    top: 8px;
    bottom: 8px;
    width: 1px;
    background: linear-gradient(180deg, var(--purple), var(--cyan));
    opacity: .42;
  }

  .page-about .about-track__rail li {
    margin: 0 0 10px;
  }

  .page-about .about-track__rail a {
    border: 0;
    padding: 6px 8px;
    white-space: normal;
    position: relative;
    border-radius: var(--radius);
  }

  .page-about .about-track__rail a::before {
    content: "";
    position: absolute;
    left: -18px;
    top: 50%;
    width: 9px;
    height: 9px;
    margin-top: -4.5px;
    border: 1px solid var(--line);
    border-radius: 50%;
    background: var(--deep);
    transition: background .25s var(--ease), box-shadow .25s var(--ease);
  }

  .page-about .about-track__rail a[aria-current="true"] {
    background: rgba(122, 92, 255, .12);
  }

  .page-about .about-track__rail a[aria-current="true"]::before {
    background: var(--purple);
    border-color: var(--purple-soft);
    box-shadow: 0 0 0 3px rgba(122, 92, 255, .18);
  }
}

@media (min-width: 1080px) {
  .page-about .about-partners {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-partner {
    padding-bottom: 62px;
  }

  .page-about .about-partner__hint {
    position: absolute;
    left: 20px;
    right: 20px;
    bottom: 16px;
    font-size: 13px;
    opacity: 0;
    transform: translateY(6px);
    transition: opacity .28s var(--ease), transform .34s var(--ease);
  }

  .page-about .about-partner:hover .about-partner__hint,
  .page-about .about-partner:focus-visible .about-partner__hint {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-partner,
  .page-about .about-partner::after,
  .page-about .about-partner__hint,
  .page-about .about-next__links a {
    transition: none;
  }
}
</final>