.page-about {
  --ab-axis-w: 56px;
  --ab-gap: 32px;
  padding-bottom: 40px;
}

/* ---------- 首屏声明 ---------- */
.page-about .ab-head {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding-top: 6px;
  padding-bottom: clamp(34px, 6vw, 72px);
}

.page-about .ab-title {
  margin: 0;
  max-width: 17ch;
  line-height: 1.08;
}

.page-about .ab-lead {
  margin: 0;
  max-width: 62ch;
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .ab-metrics {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 20px;
}

.page-about .ab-metric {
  padding: 12px 0 10px;
  border-top: 1px solid var(--line);
  min-width: 0;
}

.page-about .ab-metric__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 5vw, 38px);
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .ab-metric__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.06em;
  color: var(--mist);
}

/* ---------- 时间轴骨架 ---------- */
.page-about .ab-timeline {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .ab-axis {
  display: none;
}

.page-about .ab-flow {
  display: flex;
  flex-direction: column;
  gap: clamp(48px, 8vw, 100px);
  min-width: 0;
}

.page-about .ab-sec {
  position: relative;
  min-width: 0;
  scroll-margin-top: calc(var(--header-h) + 32px);
}

.page-about .ab-sec--narrow {
  max-width: 640px;
}

.page-about .ab-sec__title {
  margin: 10px 0 0;
  max-width: 22ch;
  font-size: clamp(23px, 3.4vw, 38px);
  font-weight: 500;
  letter-spacing: 0.02em;
  line-height: 1.28;
  color: var(--ink);
}

.page-about .ab-sec__lead {
  margin: 16px 0 0;
  max-width: 58ch;
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .ab-sec__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  margin-top: 22px;
}

.page-about .ab-sec__body p {
  margin: 0 0 16px;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.82;
  color: var(--ink-soft);
}

.page-about .ab-sec__body p:first-child {
  color: var(--ink);
}

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

/* ---------- 图片容器 ---------- */
.page-about .ab-figure {
  margin: 0;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-2);
  min-width: 0;
}

.page-about .ab-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.06);
}

.page-about .ab-figure figcaption {
  padding: 10px 13px 11px;
  font-size: 12px;
  line-height: 1.65;
  color: var(--mist);
  border-top: 1px solid var(--line-soft);
  background: var(--bg);
}

.page-about .ab-figure--wide {
  margin-top: 30px;
}

.page-about .ab-figure--banner {
  margin-top: 26px;
}

.page-about .ab-figure--banner img {
  aspect-ratio: 3 / 2;
}

/* ---------- 版本条 ---------- */
.page-about .ab-versions {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
}

.page-about .ab-version {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  padding: 24px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .ab-version__tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 58px;
  height: 58px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink-soft);
  background: var(--bg-2);
}

.page-about .ab-version__title {
  margin: 0;
  font-size: 20px;
  font-weight: 500;
  letter-spacing: 0.01em;
  line-height: 1.42;
  color: var(--ink);
}

.page-about .ab-version__body p {
  margin: 9px 0 0;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-about .ab-version--current {
  border-top-color: var(--cyan);
  background: linear-gradient(100deg, rgba(0, 229, 255, 0.08), rgba(0, 229, 255, 0) 68%);
  padding-left: 14px;
  margin-left: -14px;
  padding-right: 14px;
}

.page-about .ab-version--current .ab-version__tag {
  width: 76px;
  height: 76px;
  font-size: 27px;
  color: var(--bg);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .ab-version__body .ab-version__stat {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--orange);
}

/* ---------- 团队分组 ---------- */
.page-about .ab-crews {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: 30px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .ab-crew {
  position: relative;
  background: var(--bg-2);
  padding: 26px 20px 22px;
  min-width: 0;
}

.page-about .ab-crew::before {
  content: "";
  position: absolute;
  left: 20px;
  top: 0;
  width: 30px;
  height: 2px;
  background: var(--cyan);
}

.page-about .ab-crew h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-about .ab-crew p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-soft);
}

/* ---------- 覆盖点阵 ---------- */
.page-about .ab-cities {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(88px, 1fr));
  gap: 8px;
}

.page-about .ab-city {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 12px 10px 11px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--glass);
  min-width: 0;
  transition: border-color 200ms var(--ease), transform 200ms var(--ease), background 200ms var(--ease);
}

.page-about .ab-city__name {
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--ink);
  line-height: 1.3;
}

.page-about .ab-city__note {
  font-size: 11px;
  line-height: 1.4;
  color: var(--mist);
  transition: color 200ms var(--ease);
}

.page-about .ab-city:hover,
.page-about .ab-city:focus-visible {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-about .ab-city:hover .ab-city__note,
.page-about .ab-city:focus-visible .ab-city__note {
  color: var(--cyan);
}

.page-about .ab-city:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .ab-city.is-hot {
  border-color: rgba(0, 229, 255, 0.34);
  background: linear-gradient(155deg, rgba(0, 229, 255, 0.13), rgba(0, 229, 255, 0.02));
}

.page-about .ab-city.is-hot .ab-city__name {
  color: var(--cyan);
}

/* ---------- 合作生态 ---------- */
.page-about .ab-partners {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.page-about .ab-partner {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 20px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .ab-partner__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.4vw, 40px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1;
  color: var(--orange);
}

.page-about .ab-partner h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink);
}

.page-about .ab-partner p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-about .ab-inline-note {
  margin: 24px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--cyan);
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 56ch;
}

.page-about .ab-inline-note a {
  color: var(--cyan);
  text-underline-offset: 4px;
  text-decoration: underline;
  text-decoration-thickness: 1px;
}

/* ---------- 荣誉与备案 ---------- */
.page-about .ab-honors {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-about .ab-honor {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: 16px 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--bg-2);
}

.page-about .ab-honor__badge {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  padding: 5px 10px;
  border-radius: var(--radius);
  background: rgba(245, 225, 75, 0.14);
  border: 1px solid rgba(245, 225, 75, 0.36);
  color: var(--lemon);
}

.page-about .ab-honor__text {
  flex: 1 1 200px;
  min-width: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink-soft);
}

/* ---------- 收束 ---------- */
.page-about .ab-sec--cta {
  padding: clamp(26px, 5vw, 46px) clamp(20px, 4vw, 40px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 150% at 0% 0%, rgba(0, 229, 255, 0.15), rgba(0, 229, 255, 0) 62%),
    var(--bg-2);
}

.page-about .ab-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 24px 0 0;
}

/* ---------- 平板 ---------- */
@media (min-width: 700px) {
  .page-about .ab-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .ab-sec__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 34px;
    align-items: start;
  }

  .page-about .ab-version {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 0 28px;
    align-items: start;
  }

  .page-about .ab-version__body p:first-child {
    margin-top: 0;
  }

  .page-about .ab-figure--banner img {
    aspect-ratio: 16 / 7;
  }
}

/* ---------- 桌面：左侧年表轴线 ---------- */
@media (min-width: 960px) {
  .page-about .ab-timeline {
    grid-template-columns: var(--ab-axis-w) minmax(0, 1fr);
    column-gap: var(--ab-gap);
  }

  .page-about .ab-axis {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
    height: calc(100vh - var(--header-h) - var(--ticker-h) - 96px);
    min-height: 420px;
  }

  .page-about .ab-axis__line {
    position: absolute;
    left: 50%;
    top: 14px;
    bottom: 14px;
    width: 1px;
    transform: translateX(-50%);
    background: linear-gradient(
      to bottom,
      rgba(242, 246, 255, 0) 0%,
      var(--line-strong) 10%,
      var(--line-strong) 88%,
      rgba(242, 246, 255, 0) 100%
    );
  }

  .page-about .ab-axis__list {
    position: relative;
    list-style: none;
    margin: 0;
    padding: 0;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
  }

  .page-about .ab-axis__node {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--line-strong);
    background: var(--bg);
    color: var(--mist);
    text-decoration: none;
    transition: color 240ms var(--ease), border-color 240ms var(--ease), background-color 240ms var(--ease), transform 240ms var(--ease);
  }

  .page-about .ab-axis__num {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.06em;
  }

  .page-about .ab-axis__node:hover,
  .page-about .ab-axis__node:focus-visible {
    color: var(--ink);
    border-color: var(--cyan);
    transform: scale(1.06);
  }

  .page-about .ab-axis__node:focus-visible {
    outline: 2px solid var(--cyan);
    outline-offset: 3px;
  }

  .page-about .ab-axis__node.is-active {
    color: var(--bg);
    background: var(--cyan);
    border-color: var(--cyan);
  }

  .page-about .ab-sec--narrow {
    max-width: 680px;
  }
}

@media (min-width: 1200px) {
  .page-about {
    --ab-axis-w: 64px;
    --ab-gap: 48px;
  }

  .page-about .ab-sec--narrow {
    max-width: 720px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-city,
  .page-about .ab-axis__node {
    transition: none;
  }
}
<<<END>>>