.page-about {
  --about-aside: 260px;
  background: var(--ink);
  color: var(--bone);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--header-h) + 40px) 0 44px;
  background:
    radial-gradient(118% 96% at 92% -18%, rgba(47, 227, 200, 0.14), transparent 58%),
    linear-gradient(180deg, var(--ink-deep) 0%, var(--ink) 82%);
  overflow: hidden;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--line);
}
.page-about .about-hero .breadcrumbs { margin-bottom: 24px; }

.page-about .hero-grid {
  display: grid;
  gap: 32px;
}
.page-about .hero-title {
  margin: 12px 0 16px;
  font-size: clamp(30px, 6vw, 44px);
  line-height: 1.24;
  letter-spacing: -0.02em;
  max-width: 20ch;
}
.page-about .hero-lede {
  margin: 0;
  max-width: 58ch;
  font-size: 17px;
  line-height: 1.85;
  color: var(--bone-78);
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}
.page-about .hero-stat {
  padding: 16px 14px 18px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.page-about .hero-stat__key {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--stone);
}
.page-about .hero-stat__num {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 30px;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}
.page-about .hero-stat__num span {
  display: block;
  margin-top: 6px;
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0;
  color: var(--bone-62);
}
.page-about .hero-stat:nth-child(4) .hero-stat__num { color: var(--orange); }

/* ---------- 通用段落 ---------- */
.page-about .about-section { padding: 52px 0; }
.page-about .about-section--tight { padding-top: 20px; }
.page-about .section__head { max-width: 66ch; }

/* ---------- 团队分工 ---------- */
.page-about .filter-status {
  margin: 12px 0 0;
  min-height: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--stone);
}
.page-about .role-grid {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}
.page-about .role-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px 24px;
  min-height: 100%;
}
.page-about .role-card__num {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 28px;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.02em;
}
.page-about .role-card__num span {
  margin-left: 5px;
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--bone-62);
}
.page-about .role-card--expert .role-card__num { color: var(--orange); }
.page-about .role-card__title {
  margin: 0;
  font-size: 20px;
}
.page-about .role-card__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--bone-62);
}
.page-about .role-card .tag { align-self: flex-start; margin-top: auto; }
.page-about .role-card.filter-item[hidden] { display: none; }

/* ---------- 流程 ---------- */
.page-about .flow-figure { margin: 30px 0 26px; }

.page-about .flow-nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 12px;
  margin-bottom: 22px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}
.page-about .flow-nav a {
  flex: 0 0 auto;
  padding: 8px 14px;
  border: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--bone-62);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ease-out), border-color 0.2s var(--ease-out);
}
.page-about .flow-nav a:hover,
.page-about .flow-nav a:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
}

.page-about .flow-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  border-bottom: 1px solid var(--line);
}
.page-about .flow-step {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 16px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--header-h) + 24px);
}
.page-about .flow-step__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 26px;
  line-height: 1;
  color: var(--cyan);
}
.page-about .flow-step:nth-child(3) .flow-step__num,
.page-about .flow-step:nth-child(5) .flow-step__num { color: var(--orange); }
.page-about .flow-step__title { margin: 0 0 8px; font-size: 19px; }
.page-about .flow-step__text {
  margin: 0;
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--bone-62);
}

/* ---------- 成长阶段 ---------- */
.page-about .stage-layout {
  display: grid;
  gap: 34px;
  margin-top: 28px;
}
.page-about .stages {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .stage {
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr);
}
.page-about .stage__col {
  padding: 24px 14px 24px 0;
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.page-about .stage__index {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 26px;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.02em;
}
.page-about .stage:last-child .stage__index { color: var(--orange); }
.page-about .stage__meta {
  align-self: flex-start;
  padding: 3px 7px;
  border: 1px solid var(--line);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--stone);
}
.page-about .stage__body {
  padding: 24px 0 26px 18px;
  border-bottom: 1px solid var(--line);
}
.page-about .stage:first-child .stage__body { border-top: 1px solid var(--line); }
.page-about .stage__title { margin: 0 0 10px; font-size: 19px; }
.page-about .stage__text {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.9;
  color: var(--bone-78);
}
.page-about .stage__text a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 227, 200, 0.4);
}
.page-about .stage__note {
  margin: 12px 0 0;
  padding-left: 0;
  border-left: 2px solid transparent;
  font-size: 14px;
  line-height: 1.7;
  color: var(--stone);
  transition: color 0.25s var(--ease-out), border-color 0.25s var(--ease-out), padding-left 0.25s var(--ease-out);
}
.page-about .stage:hover .stage__note,
.page-about .stage:focus-within .stage__note {
  padding-left: 12px;
  border-left-color: var(--cyan);
  color: var(--bone-78);
}

.page-about .stage-side { display: grid; gap: 20px; align-content: start; }
.page-about .stage-side__note {
  border: 1px solid var(--line);
  padding: 20px;
  background: var(--charcoal);
}
.page-about .stage-side__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.01em;
  color: var(--bone);
}
.page-about .stage-side__note p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--bone-62);
}

/* ---------- 斜向主张带 ---------- */
.page-about .tilt-band {
  margin: 12px 0;
  padding: 46px 0;
  background: var(--layer);
  clip-path: polygon(0 22px, 100% 0, 100% calc(100% - 22px), 0 100%);
}
.page-about .tilt-band__text {
  margin: 0;
  max-width: 36ch;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 3.4vw, 26px);
  line-height: 1.6;
  letter-spacing: -0.01em;
  color: var(--bone);
}

/* ---------- 合作生态 ---------- */
.page-about .eco-grid {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}
.page-about .eco-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 22px 20px 24px;
}
.page-about .eco-card__head {
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex-wrap: wrap;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.page-about .eco-card__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 34px;
  line-height: 1;
  color: var(--orange);
  letter-spacing: -0.02em;
}
.page-about .eco-card__unit {
  font-size: 13px;
  color: var(--stone);
  margin-right: auto;
}
.page-about .eco-card__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--bone-62);
}
.page-about .eco-card__list {
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}
.page-about .eco-card__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--bone-78);
}
.page-about .eco-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 1px;
  background: var(--cyan);
}
.page-about .eco-figure { margin: 32px 0 0; }

/* ---------- 本地服务 ---------- */
.page-about .local-grid { display: grid; gap: 32px; }
.page-about .local-list {
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .local-list li {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}
.page-about .local-list li:last-child { border-bottom: 1px solid var(--line); }
.page-about .local-list__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 15px;
  color: var(--cyan);
  padding-top: 3px;
}
.page-about .local-list h3 { margin: 0 0 8px; font-size: 18px; }
.page-about .local-list p {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--bone-62);
}
.page-about .local-aside {
  padding: 24px 22px 26px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-self: start;
}
.page-about .local-aside__steps {
  margin: 0;
  padding: 0 0 0 18px;
  display: grid;
  gap: 10px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--bone-78);
}
.page-about .local-aside__foot {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--bone-62);
}
.page-about .local-aside .btn { align-self: flex-start; }

/* ---------- 成果与资质 ---------- */
.page-about .proof-grid {
  display: grid;
  gap: 1px;
  margin-top: 28px;
  background: var(--line);
  border: 1px solid var(--line);
  grid-template-columns: minmax(0, 1fr);
}
.page-about .proof-item {
  background: var(--charcoal);
  padding: 24px 20px 26px;
}
.page-about .proof__num {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 34px;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.02em;
}
.page-about .proof__num span {
  margin-left: 6px;
  font-family: var(--font-body);
  font-size: 13px;
  color: var(--bone-62);
}
.page-about .proof-item:nth-child(2) .proof__num,
.page-about .proof-item:nth-child(4) .proof__num { color: var(--orange); }
.page-about .proof__label {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--bone-62);
}
.page-about .proof-foot {
  margin: 22px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--bone-62);
}
.page-about .proof-foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 227, 200, 0.4);
}

/* ---------- 结尾 ---------- */
.page-about .cta-band {
  display: grid;
  gap: 22px;
  padding: 28px 22px 30px;
  border: 1px solid var(--line-strong);
  background: linear-gradient(120deg, var(--layer) 0%, var(--charcoal) 68%);
}
.page-about .cta-band__body h2 { margin: 10px 0 12px; font-size: 26px; }
.page-about .cta-band__body p {
  margin: 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--bone-78);
}
.page-about .cta-band__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 媒体 ---------- */
.page-about .media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.page-about .media__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--stone);
}

/* ---------- 断点 ---------- */
@media (min-width: 680px) {
  .page-about .role-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-about .proof-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 760px) {
  .page-about .flow-step {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 34px;
    padding: 28px 0;
  }
  .page-about .flow-step__num { font-size: 34px; }
  .page-about .stage { grid-template-columns: 132px minmax(0, 1fr); }
  .page-about .stage__col { padding: 28px 18px 28px 0; }
  .page-about .stage__index { font-size: 34px; }
  .page-about .stage__body { padding: 28px 0 30px 26px; }
  .page-about .stage__title { font-size: 20px; }
  .page-about .eco-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 920px) {
  .page-about .about-hero { padding: calc(var(--header-h) + 72px) 0 68px; }
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 58px;
    align-items: end;
  }
  .page-about .about-section { padding: 84px 0; }
  .page-about .about-section--tight { padding-top: 26px; }
  .page-about .eco-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .page-about .local-grid { grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr); gap: 48px; }
  .page-about .proof-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .page-about .cta-band {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 32px;
    padding: 36px 34px 38px;
  }
  .page-about .cta-band__actions { justify-content: flex-end; }
  .page-about .cta-band__body h2 { font-size: 30px; }
}

@media (min-width: 1020px) {
  .page-about .role-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .page-about .stage-layout {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 54px;
    align-items: start;
  }
  .page-about .stage-side {
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }
}
<<<END>>>