.page-about {
  --about-rail: 232px;
  --about-gutter: clamp(1.4rem, 3.4vw, 3rem);
  position: relative;
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding-top: clamp(1.2rem, 3vw, 2rem);
}
.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  align-items: center;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--muted);
}
.page-about .breadcrumb-list li + li::before {
  content: "/";
  margin-right: .5rem;
  color: var(--line-strong);
}
.page-about .breadcrumb-list a {
  color: var(--ice);
  text-decoration: none;
}
.page-about .breadcrumb-list a:hover { color: var(--text); }

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 5vw, 3.5rem);
  padding: clamp(1.8rem, 5vw, 3.2rem) 0 clamp(2.6rem, 6vw, 4.5rem);
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -12% -20% auto auto;
  width: min(680px, 85vw);
  height: min(680px, 85vw);
  background:
    radial-gradient(circle at 65% 40%, rgba(255,107,26,.20), transparent 58%),
    radial-gradient(circle at 30% 75%, rgba(79,195,247,.16), transparent 62%);
  pointer-events: none;
  z-index: 0;
}
.page-about .about-hero-copy {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}
.page-about .about-hero-copy .display {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.15rem, 7.2vw, 4.2rem);
  line-height: 1.05;
  letter-spacing: -.01em;
  transform: skewX(-3deg);
  color: var(--text);
  margin: 0;
}
.page-about .about-hero-copy .lede {
  max-width: 46ch;
  color: var(--text-soft);
  font-size: clamp(.98rem, 2.4vw, 1.075rem);
  line-height: 1.85;
}
.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: .4rem;
}
.page-about .about-hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  list-style: none;
  margin: .6rem 0 0;
  padding: 0;
}

/* 徽章视觉 */
.page-about .about-hero-visual {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.6rem;
}
.page-about .crest {
  position: relative;
  width: min(320px, 74vw);
  aspect-ratio: 1;
  display: grid;
  place-items: center;
}
.page-about .crest-halo {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background:
    conic-gradient(from 210deg, rgba(255,107,26,.55), rgba(138,92,246,.30), rgba(79,195,247,.55), rgba(255,107,26,.55));
  filter: blur(1px);
  opacity: .5;
  mask: radial-gradient(circle, transparent 62%, #000 63%, #000 72%, transparent 73%);
  -webkit-mask: radial-gradient(circle, transparent 62%, #000 63%, #000 72%, transparent 73%);
}
.page-about .crest-halo--inner {
  inset: 14%;
  opacity: .32;
  mask: radial-gradient(circle, transparent 66%, #000 67%, #000 84%, transparent 85%);
  -webkit-mask: radial-gradient(circle, transparent 66%, #000 67%, #000 84%, transparent 85%);
}
.page-about .crest-core {
  position: relative;
  width: 58%;
  aspect-ratio: 1;
  border-radius: 50%;
  display: grid;
  place-content: center;
  gap: .2rem;
  text-align: center;
  background: linear-gradient(160deg, var(--char-2), var(--ink-deep));
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow-card), inset 0 0 42px rgba(79,195,247,.14);
}
.page-about .crest-core-mark {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.5rem, 6vw, 2.1rem);
  letter-spacing: .12em;
  color: var(--orange);
}
.page-about .crest-core-sub {
  font-family: var(--font-mono);
  font-size: .62rem;
  letter-spacing: .32em;
  color: var(--muted);
}
.page-about .crest-orbit {
  position: absolute;
  border-radius: 50%;
  border: 1px dashed var(--line);
}
.page-about .crest-orbit--a {
  inset: 4%;
  border-color: rgba(255,107,26,.28);
  transform: rotate(-18deg) scaleY(.62);
}
.page-about .crest-orbit--b {
  inset: 22%;
  border-color: rgba(79,195,247,.32);
  transform: rotate(24deg) scaleY(.55);
}
.page-about .hero-metrics {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .5rem;
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-soft);
  padding-top: 1.1rem;
}
.page-about .hero-metrics li {
  display: flex;
  flex-direction: column;
  gap: .25rem;
  text-align: center;
}
.page-about .metric-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.15rem, 4.2vw, 1.6rem);
  color: var(--text);
  line-height: 1.1;
}
.page-about .metric-unit {
  font-size: .68em;
  color: var(--ice);
  margin-left: .1em;
}
.page-about .metric-label {
  font-size: .74rem;
  color: var(--muted);
  letter-spacing: .02em;
}

/* ---------- 主体双栏 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 4vw, 3rem);
  padding-bottom: clamp(3rem, 7vw, 6rem);
}

.page-about .about-rail {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 0;
}
.page-about .rail-title {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 .2rem;
  padding-left: .9rem;
  border-left: 2px solid var(--orange);
}
.page-about .rail-list {
  display: flex;
  gap: .5rem;
  list-style: none;
  margin: 0;
  padding: 0 .2rem .6rem;
  overflow-x: auto;
  scrollbar-width: thin;
}
.page-about .rail-link {
  display: flex;
  align-items: center;
  gap: .55rem;
  white-space: nowrap;
  padding: .55rem .9rem;
  border-radius: var(--pill);
  border: 1px solid var(--line);
  background: rgba(17,20,24,.72);
  color: var(--text-soft);
  text-decoration: none;
  font-size: .86rem;
  transition: border-color .2s ease, color .2s ease, background .2s ease;
}
.page-about .rail-idx {
  font-family: var(--font-mono);
  font-size: .72rem;
  color: var(--ice);
}
.page-about .rail-link:hover {
  border-color: var(--line-strong);
  color: var(--text);
  background: rgba(79,195,247,.08);
}
.page-about .rail-link:focus-visible {
  outline: 2px solid var(--violet);
  outline-offset: 3px;
}
.page-about .rail-cta {
  align-self: flex-start;
}
.page-about .about-stream {
  display: flex;
  flex-direction: column;
  gap: clamp(2.4rem, 6vw, 4.2rem);
  min-width: 0;
}

/* ---------- 编号章节 ---------- */
.page-about .chap {
  position: relative;
  padding-top: clamp(1.2rem, 3vw, 2rem);
  border-top: 1px solid var(--line-soft);
}
.page-about .chap-head {
  display: flex;
  gap: clamp(.9rem, 2.4vw, 1.6rem);
  align-items: flex-start;
  margin-bottom: 1.4rem;
}
.page-about .chap-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(2.6rem, 11vw, 4.6rem);
  line-height: .82;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(79,195,247,.42);
  letter-spacing: -.03em;
}
.page-about .chap-head-text {
  padding-top: .35rem;
}
.page-about .chap-kicker {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .22em;
  color: var(--orange);
  margin: 0 0 .5rem;
}
.page-about .chap-title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.35rem, 4.4vw, 2.1rem);
  line-height: 1.25;
  color: var(--text);
  margin: 0;
  transform: skewX(-2deg);
}
.page-about .chap-body {
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
  max-width: 62ch;
  color: var(--text-soft);
  line-height: 1.85;
}
.page-about .chap-body p { margin: 0; }
.page-about .chap-body a {
  color: var(--ice);
  text-decoration: none;
  border-bottom: 1px solid rgba(79,195,247,.4);
}
.page-about .chap-body a:hover { color: var(--orange); border-color: var(--orange); }
.page-about .about-media { margin: .4rem 0 .6rem; }
.page-about .about-media img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
}
.page-about .stream-note {
  font-size: .92rem;
  color: var(--muted);
}

/* 三条柱 */
.page-about .pillar-list {
  list-style: none;
  margin: .6rem 0 0;
  padding: 0;
  display: grid;
  gap: .8rem;
}
.page-about .pillar-list li {
  position: relative;
  display: grid;
  grid-template-columns: auto 5.6rem 1fr;
  align-items: baseline;
  gap: .7rem;
  padding: .9rem 1rem;
  border-radius: var(--radius-sm);
  background: linear-gradient(120deg, rgba(17,20,24,.92), rgba(10,26,47,.72));
  border: 1px solid var(--line-soft);
}
.page-about .pillar-mark {
  width: .55rem;
  height: .55rem;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255,107,26,.14);
  transform: translateY(-2px);
}
.page-about .pillar-list strong {
  color: var(--text);
  font-size: .98rem;
}
.page-about .pillar-list span:last-child {
  color: var(--muted);
  font-size: .92rem;
  line-height: 1.7;
}

/* 运营卡片 */
.page-about .ops-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: .4rem;
}
.page-about .ops-card {
  background: linear-gradient(150deg, var(--char-2), rgba(10,26,47,.86));
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 1.1rem 1.15rem;
  transition: transform .22s ease, border-color .22s ease;
}
.page-about .ops-card:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
}
.page-about .ops-card .card-title {
  font-size: 1.05rem;
  color: var(--text);
  margin: 0;
}
.page-about .ops-card .card-text {
  color: var(--muted);
  font-size: .92rem;
  line-height: 1.75;
  margin: .6rem 0 0;
}

/* 本地数据 */
.page-about .network-figures {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line-soft);
  border-radius: var(--radius);
  overflow: hidden;
  margin: .3rem 0;
}
.page-about .fig {
  display: flex;
  flex-direction: column;
  gap: .4rem;
  padding: 1.1rem 1.15rem;
  background: rgba(17,20,24,.9);
}
.page-about .fig-num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.6rem, 6vw, 2.3rem);
  color: var(--grass);
  line-height: 1;
}
.page-about .fig-unit {
  font-size: .58em;
  margin-left: .1em;
  color: var(--ice);
}
.page-about .fig-label {
  font-size: .86rem;
  color: var(--muted);
  line-height: 1.7;
}

/* 时间轴 */
.page-about .timeline {
  list-style: none;
  margin: .4rem 0 0;
  padding: 0 0 0 1.6rem;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.page-about .timeline::before {
  content: "";
  position: absolute;
  left: .38rem;
  top: .6rem;
  bottom: .6rem;
  width: 1px;
  background: linear-gradient(180deg, var(--orange), rgba(79,195,247,.5), transparent);
}
.page-about .tl-node {
  position: relative;
}
.page-about .tl-dot {
  position: absolute;
  left: -1.6rem;
  top: .55rem;
  width: .78rem;
  height: .78rem;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--orange);
  transition: box-shadow .2s ease, background .2s ease;
}
.page-about .tl-card {
  padding: .95rem 1.1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-soft);
  background: rgba(17,20,24,.7);
  transition: border-color .2s ease, transform .2s ease, background .2s ease;
}
.page-about .tl-node:hover .tl-card,
.page-about .tl-node:focus-within .tl-card {
  border-color: var(--line-strong);
  background: rgba(10,26,47,.9);
  transform: translateX(4px);
}
.page-about .tl-node:hover .tl-dot { background: var(--orange); box-shadow: 0 0 0 5px rgba(255,107,26,.16); }
.page-about .tl-stage {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--ice);
  margin: 0 0 .35rem;
}
.page-about .tl-title {
  font-size: 1.02rem;
  color: var(--text);
  margin: 0 0 .35rem;
  font-weight: 700;
}
.page-about .tl-text {
  font-size: .9rem;
  color: var(--muted);
  line-height: 1.75;
  margin: 0;
}

/* 合作 */
.page-about .partner-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: .9rem;
  margin-top: .3rem;
}
.page-about .partner-cell {
  padding: 1rem 1.1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--violet);
  background: rgba(17,20,24,.66);
}
.page-about .partner-title {
  font-size: 1rem;
  color: var(--text);
  margin: 0 0 .4rem;
}
.page-about .partner-cell .muted {
  font-size: .9rem;
  line-height: 1.75;
  margin: 0;
}

/* ---------- 结尾行动 ---------- */
.page-about .about-cta {
  position: relative;
  padding: clamp(1.5rem, 4vw, 2.4rem);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(140deg, rgba(255,107,26,.14), rgba(79,195,247,.10) 55%, rgba(10,26,47,.2)),
    var(--char);
  border: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: .8rem;
  overflow: hidden;
}
.page-about .about-cta::after {
  content: "";
  position: absolute;
  right: -60px;
  bottom: -80px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  border: 1px dashed rgba(255,107,26,.3);
  pointer-events: none;
}
.page-about .cta-index {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--orange);
}
.page-about .cta-title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.3rem, 4.6vw, 1.9rem);
  color: var(--text);
  margin: 0;
  transform: skewX(-2deg);
}
.page-about .cta-text {
  color: var(--text-soft);
  font-size: .95rem;
  line-height: 1.8;
  max-width: 54ch;
  margin: 0;
}
.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: .5rem;
  position: relative;
  z-index: 1;
}

/* ---------- 焦点 ---------- */
.page-about a:focus-visible,
.page-about .tl-node:focus-visible {
  outline: 2px solid var(--violet);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ---------- 桌面 ---------- */
@media (min-width: 720px) {
  .page-about .ops-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .page-about .network-figures { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .page-about .partner-row { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .page-about .pillar-list li { grid-template-columns: auto 6rem 1fr; }
  .page-about .about-hero { grid-template-columns: 1.08fr .92fr; align-items: center; }
  .page-about .about-hero-visual { align-items: stretch; }
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    column-gap: var(--about-gutter);
  }
  .page-about .about-rail {
    position: sticky;
    top: 6rem;
    align-self: start;
    max-height: calc(100vh - 8rem);
  }
  .page-about .rail-list {
    flex-direction: column;
    overflow: visible;
    padding: 0;
    gap: .35rem;
  }
  .page-about .rail-link {
    border-radius: var(--radius-sm);
    border-color: transparent;
    background: transparent;
    padding: .6rem .9rem;
  }
  .page-about .rail-link:hover {
    border-color: var(--line);
    background: rgba(79,195,247,.06);
  }
  .page-about .rail-cta { margin-top: .6rem; }
  .page-about .chap-num { font-size: 5rem; }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ops-card,
  .page-about .tl-card,
  .page-about .rail-link,
  .page-about .tl-dot {
    transition: none;
  }
  .page-about .ops-card:hover,
  .page-about .tl-node:hover .tl-card { transform: none; }
}
</｜｜DSML｜｜ parameter>
</invoke>
</main>