.page-about {
  --ab-rail-w: 168px;
  --ab-pad: clamp(16px, 3.2vw, 40px);
  background: var(--c-bg);
  color: var(--c-ink);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about [id] {
  scroll-margin-top: calc(var(--bar, 64px) + 24px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(18px, 3vw, 34px) 0 clamp(32px, 5vw, 60px);
  border-bottom: 1px solid var(--c-line);
  background:
    radial-gradient(90% 120% at 88% -10%, rgba(79, 214, 192, 0.16), transparent 62%),
    radial-gradient(70% 100% at 2% 112%, rgba(198, 255, 74, 0.1), transparent 64%),
    var(--c-bg);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(to right, rgba(22, 53, 43, 0.65) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(22, 53, 43, 0.65) 1px, transparent 1px);
  background-size: 84px 84px;
  opacity: 0.45;
  pointer-events: none;
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(22px, 4vw, 44px);
  margin-top: clamp(20px, 3vw, 34px);
}

.page-about .about-hero__lead h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(29px, 5.4vw, 56px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  font-weight: 700;
}

.page-about .about-hero__lead .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--c-lime);
  text-transform: uppercase;
}

.page-about .about-hero__lead .lede {
  margin: 18px 0 0;
  max-width: 54ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: var(--c-ink-dim);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 30px);
}

.page-about .about-hero__panel {
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(14, 36, 28, 0.94), rgba(10, 26, 21, 0.72));
  box-shadow: var(--shadow);
  padding: 10px clamp(16px, 2vw, 22px) 16px;
}

.page-about .about-facts {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-facts__row {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px solid var(--c-line);
}

.page-about .about-facts__row:last-child {
  border-bottom: 0;
}

.page-about .about-facts__k {
  font-size: 13px;
  color: var(--c-ink-mute);
  letter-spacing: 0.02em;
}

.page-about .about-facts__v {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 21px;
  font-weight: 500;
  color: var(--c-lime);
  line-height: 1.2;
}

.page-about .about-facts__u {
  font-size: 12px;
  color: var(--c-ink-mute);
  margin-left: 2px;
}

.page-about .about-hero__note {
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--c-ink-faint);
}

/* ---------- 布局与章节轨道 ---------- */
.page-about .about-layout {
  display: grid;
  gap: clamp(22px, 4vw, 44px);
  padding-top: clamp(30px, 5vw, 58px);
}

.page-about .about-rail {
  min-width: 0;
}

.page-about .about-rail__head {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--c-ink-faint);
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 8px;
  display: flex;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: thin;
  border-bottom: 1px solid var(--c-line);
}

.page-about .about-rail__item {
  flex: 0 0 auto;
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 7px 10px;
  white-space: nowrap;
  font-size: 13.5px;
  color: var(--c-ink-dim);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease), background-color 0.16s var(--ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--c-ink);
  border-bottom-color: var(--c-lime);
  background: rgba(198, 255, 74, 0.06);
  outline: none;
}

.page-about .about-rail__link:focus-visible {
  outline: 2px solid var(--c-lime);
  outline-offset: 3px;
  border-radius: 4px;
}

.page-about .about-rail__no {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--c-ink-faint);
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  padding-bottom: clamp(34px, 5.5vw, 68px);
}

.page-about .about-sec + .about-sec {
  border-top: 1px solid var(--c-line);
  padding-top: clamp(30px, 5vw, 54px);
}

.page-about .about-sec:last-child {
  padding-bottom: clamp(16px, 2vw, 24px);
}

.page-about .about-sec__head {
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-about .about-sec__no {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--c-amber-2);
  padding: 3px 9px;
  border: 1px solid rgba(232, 169, 58, 0.34);
  border-radius: 999px;
  background: rgba(232, 169, 58, 0.07);
}

.page-about .about-sec__head h2 {
  margin: 13px 0 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-size: clamp(21px, 3.4vw, 33px);
  line-height: 1.24;
  letter-spacing: -0.012em;
  font-weight: 700;
}

.page-about .about-sec__sub {
  margin: 11px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--c-ink-dim);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0 0 clamp(20px, 3vw, 30px);
}

.page-about .about-figure .media-frame {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--c-line);
}

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

.page-about .media-frame__caption {
  display: block;
  margin-top: 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--c-ink-faint);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  position: relative;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(180deg, var(--c-lime), var(--c-amber) 58%, rgba(232, 169, 58, 0.08));
}

.page-about .about-stop {
  position: relative;
  padding: 0 0 24px;
  border-radius: 6px;
}

.page-about .about-stop:last-child {
  padding-bottom: 0;
}

.page-about .about-stop:focus-visible {
  outline: 2px solid var(--c-lime);
  outline-offset: 6px;
}

.page-about .about-stop__dot {
  position: absolute;
  left: -26px;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--c-bg);
  border: 1px solid var(--c-amber);
  box-shadow: 0 0 0 3px rgba(232, 169, 58, 0.12);
  transition: background-color 0.16s var(--ease), box-shadow 0.16s var(--ease);
}

.page-about .about-stop:hover .about-stop__dot,
.page-about .about-stop:focus-visible .about-stop__dot {
  background: var(--c-amber);
  box-shadow: 0 0 0 5px rgba(232, 169, 58, 0.2);
}

.page-about .about-stop__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--c-amber-2);
}

.page-about .about-stop__title {
  margin: 6px 0 0;
  font-size: 16.5px;
  line-height: 1.42;
  font-weight: 600;
}

.page-about .about-stop__text {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--c-ink-dim);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-team__card {
  border: 1px solid var(--c-line);
  border-top: 2px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-card);
  box-shadow: var(--shadow);
  padding: 18px 17px 20px;
  transition: border-color 0.16s var(--ease), box-shadow 0.16s var(--ease);
}

.page-about .about-team__card:hover {
  box-shadow: var(--shadow-lift);
  border-color: rgba(198, 255, 74, 0.3);
}

.page-about .about-team__card--edit {
  border-top-color: var(--c-cyan);
}

.page-about .about-team__card--check {
  border-top-color: var(--c-amber);
}

.page-about .about-team__card--tech {
  border-top-color: var(--c-lime);
}

.page-about .about-team__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(30px, 4vw, 40px);
  line-height: 1;
  font-weight: 500;
  color: var(--c-ink);
}

.page-about .about-team__unit {
  font-size: 13px;
  color: var(--c-ink-mute);
  margin-left: 4px;
  font-weight: 400;
}

.page-about .about-team__title {
  margin: 10px 0 0;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.page-about .about-team__text {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--c-ink-dim);
}

.page-about .about-team__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 12px 0 0;
  border-top: 1px dashed var(--c-line);
  display: grid;
  gap: 7px;
}

.page-about .about-team__list li {
  position: relative;
  padding-left: 14px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--c-ink-mute);
}

.page-about .about-team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 5px;
  height: 1px;
  background: var(--c-lime-2);
}

/* ---------- 呼吸区 ---------- */
.page-about .about-quote {
  margin: clamp(8px, 2vw, 14px) 0 clamp(34px, 5.5vw, 66px);
  padding-left: 16px;
  border-left: 3px solid var(--c-lime);
  font-family: var(--font-display);
  font-size: clamp(19px, 3.4vw, 32px);
  line-height: 1.42;
  letter-spacing: -0.01em;
  color: var(--c-ink);
}

/* ---------- 流程 ---------- */
.page-about .about-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .about-step {
  position: relative;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: linear-gradient(170deg, rgba(14, 36, 28, 0.92), rgba(10, 26, 21, 0.88));
  padding: 18px 17px 20px;
  box-shadow: var(--shadow);
}

.page-about .about-step__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--c-cyan);
}

.page-about .about-step__title {
  margin: 9px 0 0;
  font-size: 16px;
  font-weight: 600;
}

.page-about .about-step__text {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--c-ink-dim);
}

/* ---------- 使用场景 ---------- */
.page-about .about-scenes {
  border-top: 1px solid var(--c-line);
}

.page-about .about-scene {
  display: grid;
  grid-template-columns: 1fr;
  gap: 7px;
  padding: 20px 0;
  border-bottom: 1px solid var(--c-line);
}

.page-about .about-scene__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-lime-2);
}

.page-about .about-scene__title {
  margin: 0;
  font-size: 16.5px;
  line-height: 1.4;
  font-weight: 600;
}

.page-about .about-scene__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-ink-dim);
}

/* ---------- 合作生态 ---------- */
.page-about .about-band {
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: linear-gradient(150deg, rgba(79, 214, 192, 0.11), rgba(14, 36, 28, 0.92) 48%);
  box-shadow: var(--shadow);
  padding: clamp(18px, 3vw, 30px);
}

.page-about .about-band__grid {
  display: grid;
  gap: clamp(16px, 2.6vw, 30px);
}

.page-about .about-band__figure {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--c-line);
}

.page-about .about-band__num {
  font-family: var(--font-mono);
  font-size: clamp(38px, 6vw, 58px);
  line-height: 1;
  font-weight: 500;
  color: var(--c-cyan);
}

.page-about .about-band__unit {
  font-size: 13px;
  line-height: 1.5;
  color: var(--c-ink-dim);
}

.page-about .about-band__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--c-ink-dim);
}

.page-about .about-band__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-band__list li {
  position: relative;
  padding-left: 16px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--c-ink-mute);
}

.page-about .about-band__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 1px;
  background: var(--c-lime);
}

/* ---------- 日常运营 ---------- */
.page-about .about-ops {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .about-op {
  border-left: 1px solid var(--c-line);
  padding-left: 15px;
}

.page-about .about-op__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.6vw, 34px);
  line-height: 1;
  font-weight: 500;
  color: var(--c-amber-2);
}

.page-about .about-op__title {
  margin: 9px 0 0;
  font-size: 15px;
  line-height: 1.45;
  font-weight: 600;
  color: var(--c-ink);
}

.page-about .about-op__text {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--c-ink-dim);
}

/* ---------- 结尾入口 ---------- */
.page-about .about-cta {
  margin-top: clamp(28px, 4vw, 44px);
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 1px solid var(--c-line);
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 52ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--c-ink-dim);
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-scene {
    grid-template-columns: 64px minmax(0, 0.9fr) minmax(0, 1.4fr);
    gap: 22px;
    align-items: baseline;
  }

  .page-about .about-ops {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 760px) {
  .page-about .about-team {
    grid-template-columns: 0.9fr 1fr 1.25fr;
    align-items: start;
  }

  .page-about .about-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-step:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 46px;
    right: -10px;
    width: 8px;
    height: 1px;
    background: var(--c-amber);
  }

  .page-about .about-band__grid {
    grid-template-columns: minmax(0, 0.7fr) minmax(0, 1.6fr);
    align-items: start;
  }

  .page-about .about-band__figure {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    padding-bottom: 0;
    border-bottom: 0;
    border-right: 1px solid var(--c-line);
    padding-right: 18px;
  }
}

@media (min-width: 900px) {
  .page-about .about-layout {
    grid-template-columns: var(--ab-rail-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--bar, 64px) + 22px);
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
    border-bottom: 0;
    border-left: 1px solid var(--c-line);
  }

  .page-about .about-rail__link {
    display: flex;
    align-items: baseline;
    border-bottom: 0;
    border-left: 2px solid transparent;
    margin-left: -1px;
    padding: 9px 12px;
    white-space: normal;
  }

  .page-about .about-rail__link:hover,
  .page-about .about-rail__link:focus-visible {
    border-bottom-color: transparent;
    border-left-color: var(--c-lime);
    background: rgba(198, 255, 74, 0.06);
  }

  .page-about .about-rail__link:focus-visible {
    outline: 2px solid var(--c-lime);
    outline-offset: 2px;
  }

  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-about .about-timeline {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 18px;
    padding: 32px 0 0;
  }

  .page-about .about-timeline::before {
    left: 0;
    right: 0;
    top: 5px;
    bottom: auto;
    width: auto;
    height: 1px;
    background: linear-gradient(90deg, var(--c-lime), var(--c-amber) 56%, rgba(232, 169, 58, 0.1));
  }

  .page-about .about-stop {
    padding: 0;
  }

  .page-about .about-stop__dot {
    left: 0;
    top: -32px;
  }
}

@media (min-width: 1180px) {
  .page-about {
    --ab-rail-w: 184px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-stop__dot,
  .page-about .about-team__card,
  .page-about .about-rail__link {
    transition: none;
  }
}
<<<END>>>