.page-about {
  --about-text-soft: rgba(244, 241, 232, 0.74);
  --about-text-dim: rgba(244, 241, 232, 0.56);
  --about-paper-soft: #4A5651;
  --about-line-faint: rgba(30, 59, 52, 0.75);
  --about-step-gap: clamp(14px, 2vw, 22px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-top: calc(var(--header-h) + 26px);
  padding-bottom: clamp(36px, 6vw, 76px);
  background: var(--ink-900);
}

.page-about .about-hero__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(30, 59, 52, 0.55) 1px, transparent 1px),
    radial-gradient(95% 70% at 88% 0%, rgba(200, 255, 61, 0.1), transparent 62%);
  background-size: 96px 100%, 100% 100%;
  opacity: 0.6;
}

.page-about .about-hero .shell {
  position: relative;
  z-index: 1;
}

.page-about .about-crumb-sep {
  margin: 0 0.45em;
  opacity: 0.5;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 5vw, 52px);
  margin-top: clamp(28px, 5vw, 56px);
}

.page-about .about-hero__lead h1 {
  margin: 0 0 clamp(16px, 2.4vw, 22px);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(34px, 6.4vw, 68px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero__lede {
  margin: 0 0 14px;
  max-width: 34em;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.78;
  color: var(--about-text-soft);
}

.page-about .about-hero__sub {
  margin: 0 0 clamp(22px, 3vw, 32px);
  max-width: 34em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-text-dim);
}

.page-about .about-hero__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-hero__media {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-a);
  border: 1px solid rgba(200, 255, 61, 0.2);
  background: var(--ink-700);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.06);
}

.page-about .about-hero__media .media__caption {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--about-text-dim);
}

/* ---------- 通用小标题 ---------- */
.page-about .about-lead {
  margin: 14px 0 0;
  max-width: 44em;
  font-size: 16px;
  line-height: 1.78;
  color: var(--about-text-soft);
}

.page-about .section__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 4.2vw, 46px);
  line-height: 1.08;
  letter-spacing: -0.018em;
  margin: 10px 0 0;
}

/* ---------- 四组分工 ---------- */
.page-about .about-crews {
  background: var(--ink-900);
}

.page-about .crew-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.4vw, 26px);
  margin-top: clamp(26px, 4vw, 44px);
  align-items: start;
}

.page-about .crew-card {
  position: relative;
  padding: clamp(20px, 2.6vw, 30px);
  background: var(--ink-700);
  border: 1px solid var(--about-line-faint);
  border-radius: var(--radius-b);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-about .crew-card:hover {
  transform: translateY(-4px);
  border-color: var(--lime);
}

.page-about .crew-card__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(30px, 4.4vw, 42px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--lime);
}

.page-about .crew-card__num i {
  font-style: normal;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--about-text-dim);
  margin-left: 4px;
}

.page-about .crew-card h3 {
  margin: 12px 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: 0.005em;
  color: var(--paper);
}

.page-about .crew-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--about-text-soft);
}

.page-about .crew-card__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .crew-card__list li {
  padding: 4px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--lime-soft);
  border: 1px solid var(--about-line-faint);
  border-radius: 3px;
}

/* ---------- 流程 ---------- */
.page-about .about-flow {
  position: relative;
  overflow: hidden;
  background: var(--navy-900);
}

.page-about .about-flow::before {
  content: "";
  position: absolute;
  top: -140px;
  right: -90px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(200, 255, 61, 0.14), transparent 70%);
  pointer-events: none;
}

.page-about .about-flow .shell {
  position: relative;
  z-index: 1;
}

.page-about .about-flow__banner {
  margin: clamp(26px, 4vw, 40px) 0 clamp(24px, 3.6vw, 38px);
  overflow: hidden;
  border-radius: var(--radius-b);
  border: 1px solid rgba(200, 255, 61, 0.18);
  background: var(--ink-700);
}

.page-about .about-flow__banner img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-flow__banner .media__caption {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--about-text-dim);
}

.page-about .flow-steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-step-gap);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .flow-step {
  position: relative;
  padding: 24px 18px 18px;
  background: rgba(10, 31, 26, 0.72);
  border: 1px solid var(--about-line-faint);
  border-radius: var(--radius-a);
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-about .flow-step::before {
  content: "";
  position: absolute;
  top: 0;
  left: 16px;
  right: 16px;
  height: 2px;
  background: var(--lime);
  opacity: 0.85;
}

.page-about .flow-step:hover {
  background: rgba(18, 51, 43, 0.82);
  border-color: rgba(200, 255, 61, 0.35);
}

.page-about .flow-step__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--lime);
}

.page-about .flow-step h3 {
  margin: 8px 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: 0.005em;
  color: var(--paper);
}

.page-about .flow-step > p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--about-text-soft);
}

.page-about .flow-step__more {
  display: grid;
  grid-template-rows: 1fr;
  transition: grid-template-rows 0.34s var(--ease);
}

.page-about .flow-step__more > div {
  overflow: hidden;
}

.page-about .flow-step__more p {
  margin: 12px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--about-line-faint);
  font-size: 13px;
  line-height: 1.68;
  color: var(--lime-soft);
}

@media (hover: hover) {
  .page-about .flow-step__more {
    grid-template-rows: 0fr;
  }

  .page-about .flow-step:hover .flow-step__more,
  .page-about .flow-step:focus-within .flow-step__more {
    grid-template-rows: 1fr;
  }
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  background: var(--ink-900);
}

.page-about .tl {
  margin: clamp(28px, 4vw, 46px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .tl__item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding-left: 34px;
  padding-bottom: clamp(30px, 4vw, 48px);
}

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

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 12px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--brick), rgba(180, 68, 44, 0.12));
}

.page-about .tl__item:last-child::before {
  display: none;
}

.page-about .tl__item::after {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--brick);
  box-shadow: 0 0 0 4px rgba(180, 68, 44, 0.16);
}

.page-about .tl__year {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(24px, 3.6vw, 36px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--brick);
}

.page-about .tl__body h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.4vw, 24px);
  letter-spacing: -0.005em;
  color: var(--paper);
}

.page-about .tl__body p {
  margin: 0;
  max-width: 56ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--about-text-soft);
}

/* ---------- 规模 ---------- */
.page-about .about-scale {
  background: var(--paper);
  color: var(--near-black);
}

.page-about .about-scale .section__title {
  color: var(--near-black);
}

.page-about .about-scale .eyebrow {
  color: var(--brick);
}

.page-about .scale-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(26px, 4vw, 40px);
  background: var(--line-light);
  border: 1px solid var(--line-light);
  border-radius: 4px;
  overflow: hidden;
}

.page-about .scale-item {
  padding: clamp(18px, 2.6vw, 28px);
  background: var(--paper);
}

.page-about .scale-item__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(28px, 4.4vw, 44px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--near-black);
}

.page-about .scale-item__num em {
  font-style: normal;
  font-size: 13px;
  letter-spacing: 0;
  color: #6E7A74;
  margin-left: 3px;
}

.page-about .scale-item__label {
  display: block;
  margin-top: 10px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--about-paper-soft);
}

.page-about .scale-notes {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.4vw, 28px);
  margin-top: clamp(26px, 4vw, 40px);
  padding-top: clamp(22px, 3vw, 32px);
  border-top: 1px solid var(--line-light);
}

.page-about .scale-notes p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-paper-soft);
}

/* ---------- 在地 ---------- */
.page-about .about-local {
  background: var(--ink-900);
}

.page-about .about-local__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 46px);
  margin-top: clamp(24px, 4vw, 40px);
  align-items: start;
}

.page-about .about-local__media {
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-a);
  border: 1px solid var(--about-line-faint);
  background: var(--ink-700);
}

.page-about .about-local__media img {
  display: block;
  width: 100%;
  height: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  filter: saturate(0.9) contrast(1.05);
}

.page-about .about-local__media .media__caption {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--about-text-dim);
}

.page-about .about-local__body p {
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--about-text-soft);
}

.page-about .about-local__body p:last-of-type {
  margin-bottom: 0;
}

.page-about .local-points {
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-line-faint);
}

.page-about .local-points li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--about-line-faint);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--about-text-soft);
}

.page-about .local-points span {
  flex: none;
  min-width: 5.2em;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--lime);
}

/* ---------- 结尾 ---------- */
.page-about .about-next {
  background: var(--navy-900);
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-about .about-next__box {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.4vw, 38px);
  padding: clamp(24px, 4vw, 44px);
  border: 1px solid var(--about-line-faint);
  border-radius: var(--radius-a);
  background: linear-gradient(135deg, rgba(18, 51, 43, 0.94), rgba(10, 31, 26, 0.94));
}

.page-about .about-next__box h2 {
  margin: 12px 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.6vw, 36px);
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .about-next__box p {
  margin: 0;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.82;
  color: var(--about-text-soft);
}

.page-about .about-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: start;
}

.page-about .about-next__links .btn {
  flex: 1 1 180px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .scale-notes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .scale-notes p:first-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 720px) {
  .page-about .crew-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .crew-card:nth-child(2) {
    margin-top: 40px;
  }

  .page-about .crew-grid {
    padding-bottom: 40px;
  }
}

@media (min-width: 860px) {
  .page-about .tl__item {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    gap: clamp(24px, 4vw, 48px);
    padding-left: 42px;
  }

  .page-about .tl__item::before {
    left: 5px;
  }

  .page-about .tl__year {
    padding-top: 4px;
  }
}

@media (min-width: 900px) {
  .page-about .flow-steps {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .flow-step:nth-child(even) {
    margin-top: 34px;
  }

  .page-about .flow-step {
    padding: 26px 16px 18px;
  }
}

@media (min-width: 980px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: end;
  }

  .page-about .scale-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .scale-notes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .scale-notes p:first-child {
    grid-column: auto;
  }

  .page-about .about-local__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-about .about-next__box {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
  }
}
<<<PAGE_CSS_DONE>>>