.page-about {
  --ov-rule: rgba(35, 40, 51, .18);
  --ov-rule-soft: rgba(35, 40, 51, .1);
  --ov-mute: rgba(35, 40, 51, .66);
  background: var(--paper);
  color: var(--graphite);
}

/* ---------- 首屏 ---------- */
.page-about .ov-hero {
  position: relative;
  overflow: hidden;
  padding: 26px 0 48px;
  color: var(--paper);
  background:
    radial-gradient(120% 100% at 10% 0%, var(--ink-3) 0%, transparent 58%),
    linear-gradient(168deg, var(--ink) 0%, var(--ink-2) 64%, #0D1424 100%);
}

.page-about .ov-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(159, 178, 216, .12) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(159, 178, 216, .12) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(85% 78% at 18% 8%, #000 22%, transparent 76%);
  mask-image: radial-gradient(85% 78% at 18% 8%, #000 22%, transparent 76%);
}

.page-about .ov-hero::after {
  content: "";
  position: absolute;
  right: -150px;
  top: -130px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  border: 1px solid rgba(124, 92, 255, .38);
  box-shadow:
    0 0 0 42px rgba(124, 92, 255, .07),
    0 0 0 104px rgba(61, 224, 207, .05);
  pointer-events: none;
}

.page-about .ov-hero-inner {
  position: relative;
  z-index: 1;
}

.page-about .ov-coord {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 20px 0 0;
  padding: 5px 12px;
  border: 1px solid rgba(159, 178, 216, .38);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-about .ov-title {
  margin: 18px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 8vw, 74px);
  line-height: .98;
  letter-spacing: -.02em;
  color: var(--card);
}

.page-about .ov-lead {
  max-width: 36em;
  margin: 20px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(242, 236, 223, .84);
}

.page-about .ov-hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 34px;
  margin: 28px 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid rgba(159, 178, 216, .3);
}

.page-about .ov-hero-facts li {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.page-about .ov-fact-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 24px;
  font-weight: 700;
  line-height: 1;
  color: var(--pulse);
}

.page-about .ov-fact-label {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--mist);
}

/* ---------- 外壳与刻度栏 ---------- */
.page-about .ov-shell {
  padding: 32px 0 68px;
}

.page-about .ov-rail {
  display: none;
}

.page-about .ov-rail-list {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .chapter-link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 9px 0 9px 13px;
  border-left: 2px solid var(--ov-rule);
  font-size: 13px;
  line-height: 1.45;
  color: var(--ov-mute);
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .chapter-link:hover,
.page-about .chapter-link:focus-visible {
  color: var(--graphite);
  border-left-color: var(--blue);
}

.page-about .chapter-link[data-active],
.page-about .chapter-link[aria-current] {
  color: var(--graphite);
  font-weight: 700;
  border-left-color: var(--pulse);
}

.page-about .ov-rail-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--print);
}

.page-about .ov-rail-note {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .1em;
  color: rgba(35, 40, 51, .42);
}

/* ---------- 章节 ---------- */
.page-about .ov-sec {
  padding: 30px 0 6px;
  border-top: 1px solid var(--ov-rule-soft);
  scroll-margin-top: 96px;
}

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

.page-about .ov-sec-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  margin-bottom: 16px;
}

.page-about .ov-sec-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--print);
}

.page-about .ov-sec h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 4.6vw, 33px);
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-about .ov-quarter {
  padding: 3px 9px;
  background: var(--signal);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  font-weight: 700;
}

.page-about .ov-prose {
  max-width: 38em;
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--graphite);
}

.page-about .ov-sec a {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 品牌坐标 ---------- */
.page-about .ov-pillars {
  display: grid;
  gap: 14px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ov-pillar {
  padding: 16px;
  border: 2px solid var(--graphite);
  background: var(--card);
  box-shadow: 4px 4px 0 rgba(35, 40, 51, .9);
}

.page-about .ov-pillar h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-about .ov-pillar p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ov-mute);
}

.page-about .ov-olduser {
  margin-top: 24px;
  padding: 20px 18px;
  border: 2px solid var(--ink);
  border-left-width: 6px;
  border-left-color: var(--pulse);
  background: var(--ink-2);
  color: var(--paper);
  box-shadow: var(--shadow-dark);
}

.page-about .ov-olduser .eyebrow {
  color: var(--pulse);
}

.page-about .ov-olduser h3 {
  margin: 10px 0 10px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  line-height: 1.34;
  color: var(--card);
}

.page-about .ov-olduser p {
  margin: 0 0 10px;
  max-width: 36em;
  font-size: 14.5px;
  line-height: 1.82;
  color: rgba(242, 236, 223, .84);
}

.page-about .ov-olduser-link {
  margin-bottom: 0 !important;
}

.page-about .ov-olduser a {
  color: var(--pulse);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
}

.page-about .ov-olduser a:hover {
  text-decoration: underline;
}

/* ---------- 时间线 ---------- */
.page-about .ov-time {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ov-time-item {
  position: relative;
  margin-left: 9px;
  padding: 0 0 26px 28px;
  border-left: 2px solid var(--ov-rule);
}

.page-about .ov-time-item::before {
  content: "";
  position: absolute;
  left: -9px;
  top: 4px;
  box-sizing: border-box;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--paper);
  border: 3px solid var(--graphite);
}

.page-about .ov-time-item--now::before {
  border-color: var(--blue);
  background: var(--blue);
  box-shadow: 0 0 0 4px rgba(43, 91, 255, .18);
}

.page-about .ov-time-item:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .ov-time-year {
  display: inline-block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--print);
}

.page-about .ov-time-item--now .ov-time-year {
  color: var(--blue);
}

.page-about .ov-time-item h3 {
  margin: 5px 0 6px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  line-height: 1.32;
  color: var(--ink);
}

.page-about .ov-time-item p {
  margin: 0 0 6px;
  max-width: 40em;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ov-mute);
}

.page-about .ov-time-note {
  display: inline-block;
  padding: 3px 8px;
  background: rgba(43, 91, 255, .08);
  border-left: 2px solid var(--nebula);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: rgba(35, 40, 51, .7);
  transition: background .2s var(--ease), border-color .2s var(--ease);
}

.page-about .ov-time-item:hover .ov-time-note {
  background: rgba(61, 224, 207, .18);
  border-left-color: var(--pulse);
}

.page-about .ov-time-figure {
  --frame-ratio: 16 / 9;
  margin: 26px 0 0;
  border: 2px solid var(--graphite);
  background: var(--card);
  padding: 8px;
  box-shadow: var(--shadow-hard);
}

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

.page-about .ov-time-figure .media-cap {
  display: block;
  padding: 8px 2px 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .05em;
  color: var(--ov-mute);
}

/* ---------- 四条路径 ---------- */
.page-about .ov-paths {
  display: grid;
  gap: 14px;
  margin: 20px 0 0;
}

.page-about .ov-path {
  display: block;
  padding: 16px;
  border: 2px solid var(--graphite);
  background: var(--card);
  color: inherit;
  text-decoration: none !important;
  transition: border-color .18s var(--ease), box-shadow .18s var(--ease);
}

.page-about .ov-path:hover,
.page-about .ov-path:focus-visible {
  border-color: var(--blue);
  box-shadow: 4px 4px 0 var(--graphite);
}

.page-about .ov-path-tag {
  display: inline-block;
  margin-bottom: 10px;
  padding: 2px 9px;
  background: var(--nebula);
  color: var(--card);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .1em;
}

.page-about .ov-path h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 16.5px;
  font-weight: 800;
  line-height: 1.36;
  color: var(--ink);
}

.page-about .ov-path p {
  margin: 0 0 12px;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--ov-mute);
}

.page-about .ov-path-go {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--blue);
}

.page-about .ov-arch-figure {
  margin: 20px 0 0;
  padding: 10px;
  border: 2px solid var(--graphite);
  background: var(--card);
  box-shadow: var(--shadow-hard);
}

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

.page-about .ov-arch-figure figcaption {
  padding: 8px 2px 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.6;
  letter-spacing: .04em;
  color: var(--ov-mute);
}

/* ---------- 团队 ---------- */
.page-about .ov-stats {
  display: grid;
  gap: 12px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ov-stats li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px;
  border: 2px solid var(--graphite);
  background: var(--card);
}

.page-about .ov-stat-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 34px;
  font-weight: 700;
  line-height: 1;
  color: var(--blue);
}

.page-about .ov-stat-label {
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--ov-mute);
}

/* ---------- 监测 ---------- */
.page-about .ov-monitor-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  border-top: 2px solid var(--graphite);
}

.page-about .ov-monitor-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--ov-rule-soft);
}

.page-about .ov-monitor-key {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .ov-monitor-val {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ov-mute);
}

/* ---------- 合作 ---------- */
.page-about .ov-split {
  display: grid;
  gap: 14px;
  margin: 20px 0 0;
}

.page-about .ov-split-card {
  padding: 18px 16px;
  border: 2px solid var(--graphite);
  border-top-width: 6px;
  border-top-color: var(--blue);
  background: var(--card);
}

.page-about .ov-split-card--alt {
  border-top-color: var(--nebula);
}

.page-about .ov-split-card .eyebrow {
  color: var(--print);
}

.page-about .ov-split-card h3 {
  margin: 10px 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  line-height: 1.36;
  color: var(--ink);
}

.page-about .ov-split-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ov-mute);
}

/* ---------- 版本节奏 ---------- */
.page-about .ov-inline-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin: 20px 0 0;
}

.page-about .ov-inline-links a {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .03em;
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ---------- 收束数据区 ---------- */
.page-about .ov-tail {
  position: relative;
  overflow: hidden;
  padding: 48px 0 56px;
  background:
    radial-gradient(90% 120% at 82% 10%, var(--ink-3) 0%, transparent 62%),
    linear-gradient(180deg, var(--ink-2) 0%, var(--ink) 100%);
  color: var(--paper);
}

.page-about .ov-tail-media {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .3;
}

.page-about .ov-tail-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-about .ov-tail-inner {
  position: relative;
  z-index: 1;
}

.page-about .ov-tail .ov-sec-num {
  color: var(--pulse);
}

.page-about .ov-tail h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 5.4vw, 40px);
  line-height: 1.12;
  letter-spacing: -.01em;
  color: var(--card);
}

.page-about .ov-tail-stats {
  display: grid;
  gap: 14px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ov-tail-stats li {
  padding: 16px 18px;
  border: 1px solid rgba(159, 178, 216, .42);
  background: rgba(10, 16, 32, .74);
  border-left: 4px solid var(--pulse);
}

.page-about .ov-tail-num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 28px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--pulse);
}

.page-about .ov-tail-cap {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: .04em;
  color: var(--mist);
}

.page-about .ov-tail-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-about .ov-pillars,
  .page-about .ov-split,
  .page-about .ov-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 760px) {
  .page-about .ov-hero {
    padding: 34px 0 62px;
  }

  .page-about .ov-lead {
    font-size: 16.5px;
  }

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

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

@media (min-width: 960px) {
  .page-about .ov-shell {
    display: grid;
    grid-template-columns: 196px minmax(0, 1fr);
    column-gap: 52px;
    align-items: start;
    padding: 44px 0 80px;
  }

  .page-about .ov-rail {
    display: block;
    position: sticky;
    top: 92px;
  }

  .page-about .ov-sec {
    padding: 40px 0 10px;
  }

  .page-about .ov-prose {
    font-size: 15.5px;
  }
}

@media (min-width: 1120px) {
  .page-about .ov-paths-wrap {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 28px;
    align-items: start;
  }

  .page-about .ov-arch-figure {
    margin-top: 20px;
  }

  .page-about .ov-title {
    max-width: 14em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .chapter-link,
  .page-about .ov-path,
  .page-about .ov-time-note {
    transition: none;
  }

  .page-about .ov-path:hover,
  .page-about .ov-path:focus-visible {
    box-shadow: none;
  }
}
<<<PAGE_CSS_END>>>