.page-about {
  --about-rail: 172px;
  --about-gap: 56px;
  background: var(--ink);
  color: var(--text);
  overflow-x: clip;
  padding-bottom: clamp(24px, 5vw, 56px);
}

.page-about .about-crumbs {
  padding-top: clamp(16px, 3vw, 28px);
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  padding: clamp(20px, 4vw, 44px) 0 clamp(32px, 6vw, 64px);
  isolation: isolate;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -20% -30% auto -30%;
  height: 130%;
  z-index: -1;
  pointer-events: none;
  background:
    linear-gradient(104deg,
      rgba(245, 200, 107, 0) 36%,
      rgba(245, 200, 107, 0.16) 48%,
      rgba(30, 95, 191, 0.18) 55%,
      rgba(111, 211, 232, 0.12) 61%,
      rgba(245, 200, 107, 0) 74%);
  filter: blur(2px);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: end;
}

.page-about .about-hero__title {
  margin: 0.35em 0 0.4em;
  font-size: clamp(2.4rem, 6vw, 4.6rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
}

.page-about .about-hero__hl {
  color: var(--glow);
  text-shadow: 0 0 36px rgba(245, 200, 107, 0.32);
}

.page-about .about-hero__lead {
  max-width: 34em;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-hero__media {
  margin: 0;
  border-radius: var(--r-lg) var(--r-lg) var(--r-lg) 6px;
}

.page-about .about-hero__stats {
  list-style: none;
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: clamp(18px, 3vw, 26px) 0 0;
  border-top: 1px solid var(--line-gold);
  display: grid;
  gap: 18px;
}

.page-about .about-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-left: 14px;
  border-left: 1px solid var(--line-cool);
}

.page-about .about-hero__num {
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  line-height: 1;
  color: var(--gold);
  letter-spacing: 0.02em;
}

.page-about .about-hero__stat-label {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--muted);
}

/* 主张 */
.page-about .section {
  padding: clamp(36px, 6vw, 80px) 0;
}

.page-about .about-claim__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .about-claim__text p {
  max-width: 36em;
  color: var(--text);
}

.page-about .about-claim__text p + p {
  margin-top: 1.1em;
}

.page-about .about-quote {
  margin: 0;
  padding: 6px 0 6px clamp(16px, 3vw, 26px);
  border-left: 2px solid var(--gold);
  font-size: clamp(1.1rem, 2.2vw, 1.45rem);
  line-height: 1.72;
  color: var(--glow);
  align-self: start;
}

/* 刻度分隔 */
.page-about .about-scale {
  height: 22px;
  border-top: 1px solid var(--line-cool);
  background-image:
    repeating-linear-gradient(90deg, var(--line-soft) 0 1px, transparent 1px 26px),
    repeating-linear-gradient(90deg, var(--line-gold) 0 1px, transparent 1px 130px);
  background-size: 100% 8px, 100% 16px;
  background-position: 0 0, 0 0;
  background-repeat: repeat-x;
  margin: clamp(8px, 2vw, 20px) 0 0;
  opacity: 0.9;
}

.page-about .about-scale--tight {
  margin: clamp(4px, 1.5vw, 12px) 0 0;
}

/* 时间轴 */
.page-about .about-timeline .section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 20px;
  margin-bottom: clamp(24px, 4vw, 44px);
}

.page-about .about-timeline .section-head__meta {
  font-family: var(--font-mono);
  color: var(--muted);
  font-size: 0.85rem;
  letter-spacing: 0.02em;
}

.page-about .timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(26px, 4vw, 40px);
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  top: 8px;
  bottom: 8px;
  left: 11px;
  width: 1px;
  background: linear-gradient(180deg,
    rgba(245, 200, 107, 0.6) 0%,
    rgba(111, 211, 232, 0.4) 55%,
    rgba(245, 200, 107, 0.08) 100%);
}

.page-about .tl-item {
  position: relative;
  padding-left: 38px;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 9px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--night);
  border: 1px solid rgba(245, 200, 107, 0.5);
  transition: background 0.45s var(--ease), box-shadow 0.45s var(--ease), border-color 0.45s var(--ease);
}

.page-about .tl-item[data-reveal="in"]::before {
  background: var(--gold);
  border-color: var(--glow);
  box-shadow: 0 0 0 4px rgba(245, 200, 107, 0.14), 0 0 18px rgba(245, 200, 107, 0.5);
}

.page-about .tl-mark {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .tl-year {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--gold);
  letter-spacing: 0.02em;
}

.page-about .tl-stage {
  font-size: 0.8rem;
  color: var(--muted);
  letter-spacing: 0.08em;
}

.page-about .tl-body h3 {
  margin: 8px 0 8px;
}

.page-about .tl-body p {
  margin: 0;
  max-width: 38em;
  color: var(--text);
}

/* 团队 */
.page-about .about-team__grid {
  display: grid;
  gap: clamp(22px, 4vw, 44px);
  align-items: start;
}

.page-about .about-team__media {
  margin: 0;
  border-radius: 6px var(--r-lg) var(--r-lg) var(--r-lg);
}

.page-about .about-team__body .t-lead {
  max-width: 34em;
}

.page-about .roles {
  display: grid;
  gap: 16px;
  margin-top: clamp(20px, 3vw, 32px);
}

.page-about .role {
  position: relative;
  padding: clamp(18px, 3vw, 24px);
  background: linear-gradient(155deg, var(--panel) 0%, rgba(22, 32, 58, 0.55) 100%);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md) 6px var(--r-md) var(--r-md);
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.page-about .role:hover,
.page-about .role:focus-within {
  border-color: var(--line-gold);
  transform: translateY(-2px);
}

.page-about .role:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

.page-about .role__tag {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-about .role__title {
  margin: 0 0 8px;
  font-size: 1.15rem;
  line-height: 1.4;
}

.page-about .role__desc {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--text);
}

.page-about .role__more {
  margin: 10px 0 0;
  padding-top: 10px;
  border-top: 1px dashed var(--line-cool);
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--muted);
}

/* 校对 */
.page-about .about-check__grid {
  display: grid;
  gap: clamp(22px, 4vw, 46px);
  align-items: start;
}

.page-about .about-check__text > p {
  max-width: 36em;
}

.page-about .about-check__media {
  margin: 0;
  border-radius: var(--r-lg) 6px var(--r-lg) var(--r-lg);
}

.page-about .steps {
  list-style: none;
  counter-reset: step;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .steps > li {
  position: relative;
  padding-left: 46px;
}

.page-about .steps > li::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  letter-spacing: 0.02em;
  color: var(--gold);
}

.page-about .steps > li h3 {
  margin: 0 0 6px;
  font-size: 1.05rem;
}

.page-about .steps > li p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--text);
  max-width: 36em;
}

/* 承诺 */
.page-about .about-cta {
  padding-bottom: clamp(32px, 6vw, 72px);
}

.page-about .about-cta__inner {
  display: grid;
  gap: clamp(22px, 3vw, 34px);
  padding: clamp(24px, 4vw, 48px);
  background:
    radial-gradient(120% 140% at 8% 0%, rgba(30, 95, 191, 0.28) 0%, rgba(12, 19, 38, 0) 62%),
    var(--night);
  border: 1px solid var(--line-gold);
  border-radius: var(--r-lg) var(--r-lg) 6px var(--r-lg);
}

.page-about .about-cta__text p {
  margin: 0.8em 0 0;
  max-width: 40em;
  color: var(--text);
}

.page-about .about-cta__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-self: start;
}

@media (min-width: 720px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

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

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  }

  .page-about .about-team__media {
    position: sticky;
    top: 96px;
  }

  .page-about .about-check__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    align-items: center;
  }

  .page-about .timeline {
    gap: clamp(40px, 5vw, 60px);
  }

  .page-about .timeline::before {
    left: calc(var(--about-rail) + (var(--about-gap) / 2));
  }

  .page-about .tl-item {
    display: grid;
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    column-gap: var(--about-gap);
    padding-left: 0;
  }

  .page-about .tl-item::before {
    left: calc(var(--about-rail) + (var(--about-gap) / 2) - 6px);
    top: 6px;
  }

  .page-about .tl-mark {
    flex-direction: column;
    align-items: flex-end;
    justify-content: flex-start;
    gap: 4px;
    text-align: right;
  }

  .page-about .tl-year {
    font-size: 1.15rem;
  }

  .page-about .tl-body h3 {
    margin-top: 0;
  }

  .page-about .roles {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .role:nth-child(1) {
    grid-column: 1 / span 5;
  }

  .page-about .role:nth-child(2) {
    grid-column: 7 / span 4;
    margin-top: 40px;
  }

  .page-about .role:nth-child(3) {
    grid-column: 3 / span 5;
    margin-top: 4px;
  }
}

@media (hover: hover) and (min-width: 900px) {
  .page-about .role__more {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    padding-top: 0;
    margin-top: 0;
    border-top-color: transparent;
    transition: max-height 0.32s var(--ease), opacity 0.32s var(--ease),
      padding-top 0.32s var(--ease), margin-top 0.32s var(--ease);
  }

  .page-about .role:hover .role__more,
  .page-about .role:focus-within .role__more {
    max-height: 7em;
    opacity: 1;
    padding-top: 10px;
    margin-top: 10px;
    border-top-color: var(--line-cool);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .tl-item::before,
  .page-about .role,
  .page-about .role__more {
    transition: none;
  }

  .page-about .role:hover,
  .page-about .role:focus-within {
    transform: none;
  }
}
<<<END>>>