.page-about {
  --about-pad: clamp(52px, 7.5vw, 108px);
  --about-gap: clamp(22px, 3.6vw, 44px);
  background: var(--night);
  color: var(--paper);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(88px, 13vw, 168px) 0 clamp(38px, 5vw, 64px);
  background:
    radial-gradient(120% 80% at 82% 8%, rgba(214, 166, 74, .16), transparent 62%),
    radial-gradient(90% 70% at 4% 92%, rgba(15, 59, 50, .85), transparent 68%),
    var(--night);
  isolation: isolate;
}

.page-about .about-hero__grain {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image: radial-gradient(circle at 1px 1px, rgba(246, 240, 228, .07) 1px, transparent 0);
  background-size: 4px 4px;
  opacity: .55;
}

.page-about .about-hero__inner {
  position: relative;
}

.page-about .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0 0 clamp(22px, 3vw, 36px);
  padding: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--dust);
}

.page-about .breadcrumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--dune);
}

.page-about .breadcrumbs a {
  color: var(--dust);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  color: var(--sand-lit);
  border-bottom-color: var(--sand);
}

.page-about .breadcrumbs [aria-current="page"] {
  color: var(--sand);
}

.page-about .about-hero__grid {
  display: grid;
  gap: var(--about-gap);
  align-items: end;
}

.page-about .about-hero .eyebrow {
  color: var(--sand);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  margin: 0 0 16px;
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(38px, 8.4vw, 84px);
  line-height: 1.02;
  letter-spacing: -.005em;
  margin: 0 0 20px;
  color: var(--paper);
  text-wrap: balance;
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: rgba(246, 240, 228, .8);
}

.page-about .about-hero__stats {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
  margin: clamp(26px, 4vw, 38px) 0 0;
  padding: clamp(18px, 3vw, 24px) 0 0;
  border-top: 1px solid var(--line-2);
}

.page-about .about-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}

.page-about .stat-k {
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--dust);
}

.page-about .stat-v {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(24px, 4vw, 34px);
  font-weight: 600;
  line-height: 1;
  color: var(--sand-lit);
}

.page-about .about-hero__figure {
  margin: 0;
  border: 2px solid var(--line);
  box-shadow: var(--hard-sand);
  background: var(--ink);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(.85) contrast(1.05);
}

.page-about .media-caption {
  display: block;
  padding: 12px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--dust);
  background: rgba(20, 18, 16, .72);
  border-top: 1px solid var(--line-2);
}

/* ---------- 章节通用 ---------- */
.page-about .about-section {
  padding: var(--about-pad) 0;
  position: relative;
}

.page-about .about-section--ink {
  background: var(--ink);
}

.page-about .about-section--alt {
  background: linear-gradient(180deg, rgba(30, 90, 77, .38), rgba(20, 18, 16, 0) 78%);
}

.page-about .about-head {
  display: grid;
  gap: 12px;
  margin-bottom: clamp(26px, 4vw, 48px);
}

.page-about .about-head__num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(34px, 7vw, 78px);
  font-weight: 600;
  line-height: .9;
  letter-spacing: -.03em;
  color: rgba(214, 166, 74, .34);
}

.page-about .about-head h2 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(25px, 4.6vw, 46px);
  line-height: 1.14;
  letter-spacing: .005em;
  margin: 0;
  color: var(--paper);
  max-width: 22ch;
}

.page-about .about-head__lede {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(246, 240, 228, .76);
}

.page-about .stack > * + * {
  margin-top: 14px;
}

.page-about .about-section p {
  font-size: 15px;
  line-height: 1.85;
  color: rgba(246, 240, 228, .78);
  margin: 0;
}

/* ---------- 起点 ---------- */
.page-about .about-era {
  display: grid;
  gap: clamp(20px, 3.4vw, 34px);
}

.page-about .about-era__mark {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.page-about .about-era__year {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(64px, 17vw, 148px);
  font-weight: 600;
  line-height: .82;
  letter-spacing: -.05em;
  color: transparent;
  -webkit-text-stroke: 2px rgba(214, 166, 74, .55);
}

.page-about .tag {
  display: inline-block;
  font-size: 11px;
  letter-spacing: .12em;
  padding: 4px 9px;
  border: 1px solid currentColor;
  white-space: nowrap;
}

.page-about .tag--sand { color: var(--sand-lit); }
.page-about .tag--red { color: var(--red); }
.page-about .tag--cyan { color: var(--cyan); }

/* ---------- 版本时间线 ---------- */
.page-about .tl {
  position: relative;
  padding-left: 26px;
  display: grid;
  gap: 14px;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg, var(--sand), rgba(214, 166, 74, .1));
}

.page-about .tl-item {
  position: relative;
  border: 1px solid var(--line-2);
  background: rgba(30, 90, 77, .26);
  box-shadow: 4px 4px 0 rgba(0, 0, 0, .38);
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 21px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--night);
  border: 3px solid var(--sand);
  box-sizing: border-box;
}

.page-about .tl-item.is-turn::before {
  border-color: var(--red);
}

.page-about .tl-sum {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

.page-about .tl-sum::-webkit-details-marker { display: none; }

.page-about .tl-sum::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--sand);
}

.page-about .tl-item[open] .tl-sum::after {
  content: "–";
  color: var(--cyan);
}

.page-about .tl-sum:focus-visible {
  outline: 2px solid var(--sand-lit);
  outline-offset: 2px;
}

.page-about .tl-ver {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--sand-lit);
}

.page-about .tl-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .tl-body {
  padding: 0 18px 18px;
  border-top: 1px solid var(--line-2);
  margin-top: 2px;
  padding-top: 14px;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: clamp(22px, 3.6vw, 40px);
  align-items: start;
}

.page-about .about-team__figure {
  margin: 0;
  border: 2px solid var(--line);
  background: var(--ink);
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(.8) contrast(1.06);
}

.page-about .team-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .team-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 15px 20px;
  border: 2px solid rgba(214, 166, 74, .26);
  background: rgba(20, 18, 16, .58);
  min-width: 0;
}

.page-about .team-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(30px, 5.6vw, 44px);
  font-weight: 600;
  line-height: 1;
  color: var(--sand-lit);
}

.page-about .team-role {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--paper);
}

.page-about .team-desc {
  font-size: 13px;
  line-height: 1.72;
  color: rgba(246, 240, 228, .68);
  margin: 0;
}

/* ---------- 数据流程 ---------- */
.page-about .flow {
  display: grid;
  gap: 14px;
  counter-reset: flow;
}

.page-about .flow-step {
  position: relative;
  padding: 20px 18px 22px;
  border-left: 3px solid var(--sand);
  background: rgba(30, 90, 77, .3);
}

.page-about .flow-step::before {
  counter-increment: flow;
  content: "0" counter(flow);
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-about .flow-title {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--paper);
  margin: 0 0 8px;
}

.page-about .flow-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(246, 240, 228, .74);
}

.page-about .flow-note {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 14px 16px;
  border: 1px dashed rgba(95, 227, 192, .38);
  font-size: 13px;
  line-height: 1.8;
  color: var(--cyan);
  max-width: 68ch;
}

/* ---------- 合作 ---------- */
.page-about .partner-layout {
  display: grid;
  gap: clamp(22px, 3.6vw, 40px);
  align-items: start;
}

.page-about .partner-band {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .partner-node {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 10px 15px;
  border: 1px solid var(--line);
  background: rgba(15, 59, 50, .62);
}

.page-about .partner-node b {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 21px;
  font-weight: 600;
  color: var(--sand-lit);
  line-height: 1;
}

.page-about .partner-node span {
  font-size: 13px;
  color: rgba(246, 240, 228, .78);
}

.page-about .partner-text {
  margin: 18px 0 0;
}

.page-about .award {
  margin-top: 22px;
  padding: 18px;
  border: 2px solid rgba(217, 67, 47, .62);
  background: rgba(217, 67, 47, .07);
}

.page-about .award-text {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(246, 240, 228, .82);
}

.page-about .partner-figure {
  margin: 0;
  border: 2px solid var(--line);
  background: var(--ink);
}

.page-about .partner-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  filter: saturate(.85) contrast(1.05);
}

/* ---------- 下一步 ---------- */
.page-about .next-links {
  display: grid;
  gap: 12px;
}

.page-about .next-link {
  position: relative;
  display: grid;
  gap: 7px;
  padding: 20px 46px 20px 20px;
  border: 2px solid var(--line-2);
  text-decoration: none;
  color: inherit;
  transition: border-color .25s var(--ease), background-color .25s var(--ease), transform .25s var(--ease);
}

.page-about .next-link:hover,
.page-about .next-link:focus-visible {
  border-color: var(--sand);
  background: rgba(214, 166, 74, .06);
  transform: translateY(-2px);
}

.page-about .next-k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--sand);
}

.page-about .next-t {
  font-size: 15px;
  line-height: 1.7;
  color: rgba(246, 240, 228, .86);
}

.page-about .next-go {
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--sand);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 860px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.06fr .94fr;
    gap: clamp(32px, 4vw, 60px);
  }

  .page-about .about-era {
    grid-template-columns: .8fr 1.2fr;
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-about .about-era__mark {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    position: sticky;
    top: 96px;
  }

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

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

  .page-about .flow-step {
    border-left: none;
    border-top: 3px solid var(--sand);
  }

  .page-about .partner-layout {
    grid-template-columns: 1.25fr .75fr;
    gap: clamp(28px, 4vw, 52px);
  }
}

@media (min-width: 1040px) {
  .page-about .about-team {
    grid-template-columns: .88fr 1.12fr;
    gap: clamp(32px, 4vw, 56px);
  }

  .page-about .team-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .about-head h2 {
    max-width: 26ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .next-link {
    transition: none;
  }

  .page-about .next-link:hover,
  .page-about .next-link:focus-visible {
    transform: none;
  }
}
<<<END>>>