.page-about {
  color: var(--chalk);
  background: var(--ink);
  font-family: var(--font-cn);
}

.page-about .crumb-sep {
  padding: 0 0.55em;
  color: var(--moss);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(28px, 4vw, 56px) clamp(48px, 7vw, 96px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(32px, 5vw, 64px);
}

.page-about .about-hero__main h1 {
  margin: 0.32em 0 0.55em;
  font-size: clamp(32px, 5.6vw, 66px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  max-width: 15ch;
}

.page-about .about-hero__lede {
  margin: 0 0 0.9em;
  font-size: clamp(17px, 1.9vw, 21px);
  line-height: 1.76;
  color: var(--chalk);
  max-width: 32em;
}

.page-about .about-hero__body {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--moss);
  max-width: 34em;
}

.page-about .about-hero__facts {
  border-top: 1px solid var(--line);
}

.page-about .hero-fact {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .hero-fact__num {
  font-family: var(--font-num);
  font-size: clamp(32px, 4vw, 42px);
  line-height: 0.9;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
  min-width: 2ch;
}

.page-about .hero-fact__label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--moss);
}

/* ---------- 编号章节 ---------- */
.page-about .chapter {
  display: grid;
  gap: 22px;
  padding-block: clamp(44px, 7vw, 96px);
  border-top: 1px solid var(--line-soft);
}

.page-about .chapter__head {
  display: flex;
  align-items: flex-start;
  gap: 18px;
}

.page-about .chapter__no {
  font-family: var(--font-num);
  font-size: clamp(50px, 8vw, 100px);
  line-height: 0.82;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: transparent;
  -webkit-text-stroke: 1.2px var(--cyan);
  opacity: 0.6;
  display: block;
}

.page-about .chapter__title {
  margin: 0 0 0.75em;
  font-size: clamp(22px, 2.8vw, 33px);
  line-height: 1.3;
  font-weight: 700;
}

.page-about .chapter__body p {
  margin: 0 0 0.95em;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--chalk);
  max-width: 34em;
}

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

.page-about .pull-quote {
  margin: 30px 0 0;
  padding-left: 20px;
  border-left: 1px solid var(--cyan);
  color: var(--cyan-soft);
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.72;
  max-width: 24em;
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 30px 0 0;
}

.page-about .about-figure img,
.page-about .flow__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border: 1px solid var(--line);
  background: var(--panel);
  object-fit: cover;
}

.page-about .about-figure figcaption,
.page-about .flow__figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.7;
  letter-spacing: 0.08em;
  color: var(--moss);
}

/* ---------- 团队 ---------- */
.page-about .team-grid {
  display: grid;
  gap: 1px;
  margin-top: 30px;
  border: 1px solid var(--line);
  background: var(--line-soft);
}

.page-about .team-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 24px 20px 26px;
  background: var(--panel);
  border: 1px solid transparent;
  transition: border-color 0.14s var(--ease), background-color 0.14s var(--ease);
}

.page-about .team-card:hover,
.page-about .team-card:focus-within {
  border-color: var(--cyan);
}

.page-about .team-card__num {
  font-family: var(--font-num);
  font-size: clamp(36px, 4vw, 50px);
  line-height: 0.9;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .team-card__role {
  font-size: 17px;
  font-weight: 700;
  color: var(--chalk);
}

.page-about .team-card__desc {
  display: block;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--moss);
  max-width: 30em;
}

/* ---------- 里程碑 ---------- */
.page-about .milestone-stage {
  position: relative;
  margin-block: clamp(20px, 3vw, 40px);
  overflow: hidden;
  background: var(--ink-deep);
  border-block: 1px solid var(--line);
}

.page-about .milestone-stage__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.34;
  filter: saturate(0.5) contrast(1.08);
}

.page-about .milestone-stage::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 28, 22, 0.76), rgba(7, 28, 22, 0.96));
  pointer-events: none;
}

.page-about .milestone-inner {
  position: relative;
  z-index: 1;
  padding-block: clamp(40px, 6vw, 84px);
}

.page-about .milestone-head {
  display: grid;
  gap: 18px;
  margin-bottom: 34px;
}

.page-about .milestone-head h2 {
  margin: 0 0 0.55em;
  font-size: clamp(23px, 3vw, 36px);
  line-height: 1.26;
}

.page-about .milestone-head p {
  margin: 0;
  font-size: 16px;
  line-height: 1.82;
  color: var(--moss);
  max-width: 36em;
}

.page-about .milestone-track {
  display: flex;
  gap: 0;
  margin: 0;
  padding: 0 0 12px;
  list-style: none;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  border-top: 1px solid var(--line);
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-about .milestone-track:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 6px;
}

.page-about .milestone {
  flex: 0 0 min(250px, 76vw);
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 24px 24px 26px 0;
  border-right: 1px solid var(--line-soft);
}

.page-about .milestone:last-child {
  border-right: none;
}

.page-about .milestone::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 242, 200, 0.14);
  margin-bottom: 12px;
}

.page-about .milestone__year {
  font-family: var(--font-num);
  font-size: clamp(28px, 3.6vw, 40px);
  line-height: 0.9;
  color: var(--chalk);
  font-variant-numeric: tabular-nums;
}

.page-about .milestone__season {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .milestone__desc {
  margin: 4px 0 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--moss);
}

.page-about .milestone-hint {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--moss);
}

/* ---------- 复核流程 ---------- */
.page-about .flow {
  display: grid;
  gap: 28px;
  margin-top: 6px;
}

.page-about .flow__steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
  display: grid;
  gap: 18px;
}

.page-about .flow__steps li {
  counter-increment: step;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 12px;
  font-size: 16px;
  line-height: 1.82;
  color: var(--chalk);
}

.page-about .flow__steps li::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  padding-top: 0.55em;
}

.page-about .flow__figure {
  margin: 0;
}

/* ---------- 结尾入口 ---------- */
.page-about .about-cta {
  margin-top: clamp(24px, 4vw, 56px);
  padding-block: clamp(48px, 7vw, 96px);
  background: var(--paper);
  color: var(--ink);
}

.page-about .about-cta h2 {
  margin: 0 0 0.5em;
  font-size: clamp(26px, 3.4vw, 40px);
  line-height: 1.24;
  color: var(--ink);
}

.page-about .about-cta > .shell > p {
  margin: 0;
  max-width: 36em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--line);
}

.page-about .cta-links {
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: rgba(30, 74, 61, 0.28);
  border: 1px solid rgba(30, 74, 61, 0.28);
}

.page-about .cta-links a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 14px;
  align-items: baseline;
  padding: 20px;
  background: var(--paper);
  color: var(--ink);
  text-decoration: none;
  transition: background-color 0.14s var(--ease);
}

.page-about .cta-links a:hover,
.page-about .cta-links a:focus-visible {
  background: var(--chalk);
}

.page-about .cta-links a:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: -2px;
}

.page-about .cta-links__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--orange);
}

.page-about .cta-links__label {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .cta-links__hint {
  grid-column: 2;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--line);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .team-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1fr) 268px;
    align-items: end;
  }

  .page-about .chapter {
    grid-template-columns: 190px minmax(0, 1fr);
    column-gap: clamp(28px, 4vw, 72px);
  }

  .page-about .chapter__head {
    flex-direction: column;
    gap: 22px;
    position: sticky;
    top: 116px;
    align-self: start;
  }

  .page-about .milestone-head {
    grid-template-columns: 190px minmax(0, 1fr);
    column-gap: clamp(28px, 4vw, 72px);
    align-items: start;
  }

  .page-about .flow {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 36px;
    align-items: start;
  }
}

@media (min-width: 1200px) {
  .page-about .chapter {
    grid-template-columns: 230px minmax(0, 1fr);
  }

  .page-about .milestone-head {
    grid-template-columns: 230px minmax(0, 1fr);
  }

  .page-about .flow {
    grid-template-columns: minmax(0, 1fr) 320px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-card,
  .page-about .cta-links a {
    transition: none;
  }
}
<<<END>>>