.page-about {
  background: var(--green-800);
  color: var(--paper);
  overflow-x: hidden;
}

.page-about .about-crumbs {
  padding-top: var(--space-6);
  padding-bottom: var(--space-2);
}

.page-about .about-crumbs .crumbs a {
  color: var(--muted);
  text-decoration: none;
}

.page-about .about-crumbs .crumbs a:hover,
.page-about .about-crumbs .crumbs a:focus-visible {
  color: var(--lime);
}

.page-about .about-sep {
  height: 1px;
  background: repeating-linear-gradient(90deg, var(--green-600) 0 1px, transparent 1px 12px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: var(--space-5) var(--space-7);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
  align-items: end;
}

.page-about .about-hero__title {
  margin: var(--space-3) 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 7vw, 72px);
  line-height: 1.12;
  letter-spacing: -0.01em;
  max-width: 15em;
}

.page-about .about-hero__lede {
  margin: var(--space-4) 0 0;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--paper);
  max-width: 34em;
}

.page-about .about-hero__facts {
  list-style: none;
  margin: var(--space-5) 0 0;
  padding: var(--space-4) 0 0;
  border-top: var(--line-hard);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-3);
}

.page-about .about-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.page-about .about-fact__k {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(22px, 3.2vw, 34px);
  line-height: 1.1;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .about-fact__v {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
  line-height: 1.5;
}

.page-about .about-hero__fig {
  margin: 0;
  border: var(--line-hard);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 34px), calc(100% - 34px) 100%, 0 100%);
}

.page-about .about-hero__fig img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.75) contrast(1.08) brightness(0.86);
}

/* ---------- 起点 ---------- */
.page-about .about-origin {
  padding-block: var(--space-7);
}

.page-about .about-origin__wrap {
  max-width: 46rem;
}

.page-about .about-origin__title {
  margin: var(--space-3) 0 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1.2;
}

.page-about .about-origin__prose {
  margin-top: var(--space-5);
  color: var(--paper);
  font-size: 16px;
  line-height: 1.85;
  max-width: 34em;
}

.page-about .about-origin__prose p {
  margin: 0 0 var(--space-4);
}

.page-about .about-origin__prose a,
.page-about .about-eras__more a,
.page-about .about-next__hint a {
  color: var(--lime-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-quote {
  margin: var(--space-6) 0 0;
  padding: var(--space-2) 0 var(--space-2) var(--space-5);
  border-left: 3px solid var(--lime);
  font-family: var(--font-display);
  font-size: clamp(19px, 2.4vw, 28px);
  line-height: 1.65;
  color: var(--paper);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  padding-block: var(--space-7);
  background: var(--green-900);
}

.page-about .about-team__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
}

.page-about .about-team__head .h-section {
  margin: var(--space-3) 0 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1.2;
}

.page-about .about-team__intro {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.85;
  max-width: 34em;
}

.page-about .about-team__intro p {
  margin: 0;
}

.page-about .about-team__list {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
}

.page-about .about-team__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-2);
  padding-block: var(--space-5);
  border-top: var(--line-hard);
}

.page-about .about-team__list > .about-team__row:last-child {
  border-bottom: var(--line-hard);
}

.page-about .about-team__num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(52px, 12vw, 96px);
  line-height: 0.88;
  letter-spacing: -0.02em;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}

.page-about .about-team__role {
  margin: 0 0 var(--space-2);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--lime);
  font-weight: 400;
}

.page-about .about-team__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 34em;
}

.page-about .about-team__desc a {
  color: var(--lime-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 数据流程 ---------- */
.page-about .about-flow {
  padding-block: var(--space-7);
}

.page-about .about-flow__head .h-section {
  margin: var(--space-3) 0 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1.2;
}

.page-about .about-flow__lede {
  margin: var(--space-4) 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.85;
  max-width: 34em;
}

.page-about .about-flow__fig {
  margin: var(--space-6) 0 0;
  border: var(--line-hard);
  clip-path: polygon(0 0, calc(100% - 28px) 0, 100% 28px, 100% 100%, 0 100%);
}

.page-about .about-flow__fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.7) contrast(1.1) brightness(0.8);
}

.page-about .about-flow__diagram {
  display: none;
  width: 100%;
  height: auto;
  margin: var(--space-6) 0 0;
}

.page-about .about-flow__steps {
  list-style: none;
  margin: var(--space-5) 0 0;
  padding: 0;
}

.page-about .about-flow__step {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr);
  gap: var(--space-2) var(--space-3);
  padding-block: var(--space-4);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-flow__step:first-child {
  border-top: 1px solid var(--line-soft);
}

.page-about .about-flow__idx {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--lime);
  letter-spacing: 0.08em;
  padding-top: 3px;
}

.page-about .about-flow__ttl {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
  letter-spacing: 0.02em;
}

.page-about .about-flow__txt {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 34em;
}

/* ---------- 历程 ---------- */
.page-about .about-eras {
  padding-block: var(--space-7);
  background: var(--green-900);
}

.page-about .about-eras__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-areas:
    "toc"
    "list";
  gap: var(--space-6);
}

.page-about .about-eras__toc {
  grid-area: toc;
  border-top: var(--line-hard);
  padding-top: var(--space-3);
}

.page-about .about-eras__toc-ttl {
  margin: 0 0 var(--space-3);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.page-about .about-eras__toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-4);
}

.page-about .about-eras__toc-list a {
  display: inline-block;
  font-size: 13px;
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid var(--green-600);
  padding-bottom: 3px;
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .about-eras__toc-list a:hover,
.page-about .about-eras__toc-list a:focus-visible {
  color: var(--lime);
  border-color: var(--lime);
}

.page-about .about-eras__main {
  grid-area: list;
  min-width: 0;
}

.page-about .about-eras__main .h-section {
  margin: var(--space-3) 0 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1.2;
  max-width: 18em;
}

.page-about .about-eras__list {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
}

.page-about .about-eras__item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-2);
  padding: var(--space-5) 0 var(--space-5) var(--space-5);
  border-left: 1px solid var(--line-soft);
  scroll-margin-top: 110px;
}

.page-about .about-eras__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: calc(var(--space-5) + 12px);
  width: 9px;
  height: 9px;
  background: var(--green-600);
  transform: rotate(45deg);
  transition: background 200ms var(--ease);
}

.page-about .about-eras__item:hover::before,
.page-about .about-eras__item:focus-within::before {
  background: var(--lime);
}

.page-about .about-eras__ver {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .about-eras__name {
  margin: 0 0 var(--space-2);
  font-family: var(--font-display);
  font-size: clamp(19px, 2.4vw, 26px);
  line-height: 1.35;
  color: var(--paper);
  font-weight: 700;
}

.page-about .about-eras__core {
  margin: 0 0 var(--space-2);
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper);
  max-width: 32em;
}

.page-about .about-eras__detail {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  max-width: 34em;
}

.page-about .about-eras__more {
  margin: var(--space-6) 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 合作 ---------- */
.page-about .about-partners {
  padding-block: var(--space-7);
}

.page-about .about-partners__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
  align-items: start;
}

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

.page-about .about-partners__text .h-section {
  margin: var(--space-3) 0 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1.2;
  max-width: 16em;
}

.page-about .about-partners__lede {
  margin: var(--space-4) 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.85;
  max-width: 34em;
}

.page-about .about-partners__list {
  list-style: none;
  margin: var(--space-6) 0 0;
  padding: 0;
}

.page-about .about-partners__row {
  display: grid;
  grid-template-columns: 4.6rem minmax(0, 1fr);
  gap: var(--space-3);
  padding-block: var(--space-4);
  border-top: var(--line-hard);
}

.page-about .about-partners__list > .about-partners__row:last-child {
  border-bottom: var(--line-hard);
}

.page-about .about-partners__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.3;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .about-partners__role {
  margin: 0 0 var(--space-1);
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-partners__row p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-partners__fig {
  margin: 0;
  border: var(--line-hard);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 28px 100%, 0 calc(100% - 28px));
}

.page-about .about-partners__fig img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.7) contrast(1.1) brightness(0.82);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  padding-block: var(--space-7) var(--space-8);
  background: var(--green-900);
}

.page-about .about-next__wrap {
  max-width: 62rem;
}

.page-about .about-next__wrap .h-section {
  margin: var(--space-3) 0 0;
  font-family: var(--font-display);
  font-size: clamp(26px, 4vw, 42px);
  line-height: 1.2;
}

.page-about .about-next__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-5);
}

.page-about .about-next__cell {
  padding: var(--space-4) var(--space-4) var(--space-4) var(--space-5);
  border-left: 3px solid var(--orange);
  background: rgba(7, 42, 32, 0.6);
}

.page-about .about-next__ttl {
  margin: 0 0 var(--space-2);
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-next__cell p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-next__cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin: var(--space-5) 0 0;
}

.page-about .about-next__hint {
  margin: var(--space-4) 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-flow__step {
    grid-template-columns: 3rem minmax(0, 12rem) minmax(0, 1fr);
    align-items: baseline;
  }

  .page-about .about-flow__idx {
    grid-row: auto;
    padding-top: 0;
  }

  .page-about .about-next__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--space-6);
  }
}

@media (min-width: 768px) {
  .page-about .about-flow__diagram {
    display: block;
  }

  .page-about .about-team__row {
    grid-template-columns: minmax(120px, 3fr) minmax(0, 9fr);
    align-items: start;
    gap: var(--space-6);
  }

  .page-about .about-team__head {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: var(--space-6);
  }
}

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

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: var(--space-7);
  }

  .page-about .about-partners__fig {
    position: sticky;
    top: 118px;
  }
}

@media (min-width: 980px) {
  .page-about .about-eras__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 3fr);
    grid-template-areas: "list toc";
    gap: var(--space-7);
    align-items: start;
  }

  .page-about .about-eras__toc {
    position: sticky;
    top: 118px;
  }

  .page-about .about-eras__toc-list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: var(--space-3);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-eras__toc-list a,
  .page-about .about-eras__item::before {
    transition: none;
  }

  .page-about .about-hero__fig,
  .page-about .about-flow__fig,
  .page-about .about-partners__fig {
    clip-path: none;
  }
}
<<<END>>>