.page-about {
  --about-hair: rgba(34, 48, 44, 0.16);
  --about-hair-dark: rgba(232, 206, 140, 0.2);
  --about-line: rgba(31, 107, 88, 0.5);
  background: var(--paper);
  color: var(--graphite);
  display: block;
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 30px) 0 clamp(38px, 5.5vw, 66px);
  background-color: var(--ink-deep);
  background-image:
    repeating-linear-gradient(90deg, rgba(232, 206, 140, 0.06) 0 1px, transparent 1px 92px),
    repeating-linear-gradient(0deg, rgba(31, 107, 88, 0.18) 0 1px, transparent 1px 68px);
  color: var(--paper);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold) 18%, var(--gold) 82%, transparent);
  opacity: 0.55;
}

.page-about .about-hero .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 clamp(20px, 3vw, 32px);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(247, 244, 236, 0.55);
}

.page-about .about-hero .breadcrumb a {
  color: var(--gold-light);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.18s ease;
}

.page-about .about-hero .breadcrumb a:hover,
.page-about .about-hero .breadcrumb a:focus-visible {
  border-bottom-color: var(--gold-light);
}

.page-about .about-hero .breadcrumb__sep {
  color: rgba(232, 206, 140, 0.6);
}

.page-about .about-hero__frame {
  padding: clamp(22px, 3.6vw, 48px);
  background: rgba(11, 46, 39, 0.5);
}

.page-about .about-hero__label {
  margin: 0;
  color: var(--gold-light);
}

.page-about .about-hero h1 {
  margin: 16px 0 0;
  max-width: 22ch;
  font-family: var(--font-head);
  font-size: clamp(30px, 5.2vw, 60px);
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero__lede {
  margin: 22px 0 0;
  max-width: 64ch;
  font-size: clamp(16px, 1.3vw, 18px);
  line-height: 1.9;
  color: rgba(247, 244, 236, 0.86);
}

.page-about .hero-stats {
  list-style: none;
  margin: clamp(26px, 3.4vw, 38px) 0 0;
  padding: clamp(20px, 2.6vw, 28px) 0 0;
  border-top: 1px solid var(--about-hair-dark);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 20px;
}

.page-about .hero-stats__num {
  display: block;
  font-family: var(--font-data);
  font-size: clamp(22px, 2.6vw, 32px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--gold-light);
  font-variant-numeric: tabular-nums;
}

.page-about .hero-stats__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: rgba(247, 244, 236, 0.68);
}

/* ============ 阶段跳转条 ============ */
.page-about .stage-jump {
  background: var(--paper);
  border-bottom: 1px solid var(--about-hair);
}

.page-about .stage-jump__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .stage-jump__list li {
  flex: 0 0 auto;
}

.page-about .stage-jump__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 16px 20px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--graphite);
  text-decoration: none;
  white-space: nowrap;
  border-right: 1px solid var(--about-hair);
  transition: background-color 0.18s ease, color 0.18s ease;
}

.page-about .stage-jump__num {
  color: var(--moss);
  font-size: 12px;
  letter-spacing: 0.14em;
  transition: color 0.18s ease;
}

.page-about .stage-jump__list a:hover,
.page-about .stage-jump__list a:focus-visible {
  background: var(--ink-arch);
  color: var(--paper);
}

.page-about .stage-jump__list a:hover .stage-jump__num,
.page-about .stage-jump__list a:focus-visible .stage-jump__num {
  color: var(--gold-light);
}

/* ============ 阶段区块通用 ============ */
.page-about .about-step {
  position: relative;
  padding: clamp(40px, 6vw, 84px) 0;
  background: var(--paper);
  border-bottom: 1px solid var(--about-hair);
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.page-about .about-step--dark {
  background: var(--ink-arch);
  border-bottom-color: var(--about-hair-dark);
  color: rgba(247, 244, 236, 0.86);
}

.page-about .about-step--stone {
  background: var(--stone);
}

.page-about .about-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 34px);
}

.page-about .about-step__aside {
  position: relative;
  padding-left: 26px;
  min-width: 0;
}

.page-about .about-step__aside::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 22px;
  bottom: 0;
  width: 1px;
  background: var(--moss);
  opacity: 0.5;
}

.page-about .about-step--dark .about-step__aside::before {
  background: var(--gold);
  opacity: 0.42;
}

.page-about .about-step__aside::after {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 11px;
  height: 11px;
  background: var(--gold);
}

.page-about .about-step__num {
  margin: 0;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
}

.page-about .about-step--dark .about-step__num {
  color: var(--gold-light);
}

.page-about .about-step__stage {
  margin: 7px 0 12px;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.03em;
  color: var(--ink-arch);
}

.page-about .about-step--dark .about-step__stage {
  color: var(--paper);
}

.page-about .about-step--dark .arc-note {
  color: rgba(247, 244, 236, 0.62);
}

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

.page-about .about-step__body h2 {
  margin: 0 0 18px;
  font-family: var(--font-head);
  font-size: clamp(23px, 3.1vw, 36px);
  font-weight: 800;
  line-height: 1.26;
  letter-spacing: -0.015em;
  color: var(--ink-deep);
}

.page-about .about-step--dark .about-step__body h2 {
  color: var(--paper);
}

.page-about .about-step__body p {
  margin: 0 0 16px;
  font-size: 17px;
  line-height: 1.85;
  color: var(--graphite);
}

.page-about .about-step--dark .about-step__body p {
  color: rgba(247, 244, 236, 0.84);
}

.page-about .about-step__body h3 {
  margin: 0 0 10px;
  font-size: 19px;
  font-weight: 800;
  line-height: 1.4;
  letter-spacing: -0.005em;
  color: var(--ink-deep);
}

.page-about .about-step--dark .about-step__body h3 {
  color: var(--paper);
}

.page-about .about-link {
  color: var(--ink-arch);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
  transition: color 0.18s ease, border-color 0.18s ease;
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--ink-arch);
}

.page-about .about-step--dark .about-link {
  color: var(--gold-light);
  border-bottom-color: rgba(232, 206, 140, 0.5);
}

.page-about .about-step--dark .about-link:hover,
.page-about .about-step--dark .about-link:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

.page-about .about-figure {
  margin: 0 0 20px;
}

.page-about .about-step__body .arc-figure__caption {
  margin: -8px 0 22px;
  font-family: var(--font-data);
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: 0.03em;
  color: rgba(34, 48, 44, 0.62);
}

.page-about .about-step--dark .about-step__body .arc-figure__caption {
  color: rgba(247, 244, 236, 0.6);
}

/* ============ 团队索引表 ============ */
.page-about .role-index {
  list-style: none;
  margin: 26px 0 22px;
  padding: 0;
  border-top: 1px solid var(--about-hair-dark);
}

.page-about .role-index li {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 18px 12px 18px 16px;
  border-bottom: 1px solid rgba(232, 206, 140, 0.16);
  transition: background-color 0.18s ease;
}

.page-about .role-index li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: transparent;
  transition: background-color 0.2s ease;
}

.page-about .role-index li:hover,
.page-about .role-index li:focus-within {
  background: rgba(232, 206, 140, 0.08);
}

.page-about .role-index li:hover::before,
.page-about .role-index li:focus-within::before {
  background: var(--gold);
}

.page-about .role-index__num {
  font-family: var(--font-data);
  font-size: 24px;
  line-height: 1;
  color: var(--gold-light);
  font-variant-numeric: tabular-nums;
}

.page-about .role-index__name {
  display: block;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.05em;
  color: var(--paper);
  padding-top: 2px;
}

.page-about .role-index__desc {
  display: block;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(247, 244, 236, 0.78);
}

/* ============ 三审流程 ============ */
.page-about .review-flow {
  list-style: none;
  margin: 26px 0 22px;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border-top: 1px solid var(--about-hair);
}

.page-about .review-flow > li {
  position: relative;
  padding: 22px 8px 22px 20px;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .review-flow > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 24px;
  bottom: 24px;
  width: 2px;
  background: var(--moss);
  opacity: 0.45;
  transition: background-color 0.2s ease, opacity 0.2s ease;
}

.page-about .review-flow > li:hover::before,
.page-about .review-flow > li:focus-within::before {
  background: var(--gold);
  opacity: 1;
}

.page-about .review-flow__idx {
  margin: 0 0 8px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--moss);
}

.page-about .review-flow__title {
  margin: 0 0 10px;
  font-size: 19px;
  font-weight: 800;
  color: var(--ink-deep);
}

.page-about .review-flow__text {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--graphite);
}

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

.page-about .review-flow__items li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(34, 48, 44, 0.76);
}

.page-about .review-flow__items li + li {
  margin-top: 5px;
}

.page-about .review-flow__items li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.72em;
  width: 5px;
  height: 5px;
  background: var(--gold);
}

/* ============ 字段列表 ============ */
.page-about .field-list {
  list-style: none;
  margin: 24px 0 22px;
  padding: 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .field-list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .field-list__key {
  font-family: var(--font-data);
  font-size: 14px;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--ink-arch);
}

.page-about .field-list__val {
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--graphite);
}

/* ============ 发展节点 ============ */
.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3vw, 40px);
  margin-top: 26px;
}

.page-about .milestones {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .milestones::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--moss);
  opacity: 0.55;
}

.page-about .milestones li {
  position: relative;
  padding: 0 0 24px 30px;
}

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

.page-about .milestones li::before {
  content: "";
  position: absolute;
  left: 1px;
  top: 5px;
  width: 11px;
  height: 11px;
  background: var(--stone);
  border: 1px solid var(--moss);
}

.page-about .milestones li:last-child::before {
  background: var(--gold);
  border-color: var(--gold);
}

.page-about .milestones__year {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-data);
  font-size: 14px;
  letter-spacing: 0.1em;
  color: var(--ink-arch);
  font-variant-numeric: tabular-nums;
}

.page-about .milestones__text {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--graphite);
}

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

.page-about .about-split__aside .arc-figure {
  margin: 0 0 10px;
}

.page-about .about-split__aside .arc-figure__caption {
  margin: 0;
  font-family: var(--font-data);
  font-size: 12.5px;
  line-height: 1.7;
  letter-spacing: 0.03em;
  color: rgba(34, 48, 44, 0.62);
}

/* ============ 长期追溯 ============ */
.page-about .about-pair {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 36px);
  margin-top: 6px;
}

.page-about .about-pair__title {
  position: relative;
  margin: 0 0 14px;
  padding-top: 16px;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--gold-light);
}

.page-about .about-pair__title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 34px;
  height: 2px;
  background: var(--gold);
}

.page-about .about-quote {
  margin-top: clamp(24px, 3vw, 34px);
  padding: 20px 22px;
  border-left: 2px solid var(--gold);
  background: rgba(11, 46, 39, 0.42);
}

.page-about .about-quote p {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(247, 244, 236, 0.9);
}

/* ============ 收尾入口 ============ */
.page-about .about-cta {
  padding: clamp(44px, 6vw, 82px) 0 clamp(48px, 6vw, 88px);
  background: var(--paper);
}

.page-about .about-cta__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 3.4vw, 44px);
}

.page-about .about-cta__lead .arc-kicker {
  margin: 0 0 10px;
}

.page-about .about-cta__lead h2 {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-size: clamp(24px, 3.2vw, 38px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.015em;
  color: var(--ink-deep);
}

.page-about .about-cta__lead p {
  margin: 0 0 24px;
  max-width: 56ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--graphite);
}

.page-about .about-cta__links {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-cta__links li {
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-cta__links a {
  display: block;
  padding: 16px 4px 16px 0;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--ink-arch);
  text-decoration: none;
  transition: color 0.18s ease, padding-left 0.18s ease;
}

.page-about .about-cta__links a span {
  display: block;
  margin-top: 6px;
  font-size: 13.5px;
  font-weight: 400;
  line-height: 1.7;
  letter-spacing: 0.01em;
  color: rgba(34, 48, 44, 0.66);
}

.page-about .about-cta__links a:hover,
.page-about .about-cta__links a:focus-visible {
  color: var(--gold);
  padding-left: 10px;
}

.page-about .about-cta__links a:hover span,
.page-about .about-cta__links a:focus-visible span {
  color: var(--ink-arch);
}

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

  .page-about .field-list li {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 0 24px;
    align-items: baseline;
  }

  .page-about .role-index li {
    grid-template-columns: 62px 112px minmax(0, 1fr);
    gap: 0 20px;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-about .about-row {
    grid-template-columns: minmax(0, 244px) minmax(0, 1fr);
    gap: clamp(36px, 4.5vw, 72px);
  }

  .page-about .about-step__aside {
    padding-left: 30px;
  }

  .page-about .review-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 clamp(16px, 2vw, 28px);
  }

  .page-about .review-flow > li {
    border-bottom: 0;
    padding: 24px 4px 26px 20px;
  }

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

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

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

@media (max-width: 480px) {
  .page-about .about-hero h1 {
    font-size: 28px;
  }

  .page-about .hero-stats__num {
    font-size: 21px;
  }

  .page-about .stage-jump__list a {
    padding: 14px 14px;
    font-size: 13px;
  }
}
<<<END>>>