.page-about {
  --about-rail: 0px;
  --about-gap: clamp(18px, 3.2vw, 34px);
}

.page-about img {
  display: block;
  max-width: 100%;
  height: auto;
}

.page-about .prose {
  max-width: 62ch;
}

.page-about .prose p {
  margin: 0 0 1.1em;
  line-height: 1.8;
}

.page-about .prose p:last-child {
  margin-bottom: 0;
}

.page-about h2 {
  margin: 0 0 18px;
  font-size: clamp(27px, 4.6vw, 44px);
  line-height: 1.14;
  letter-spacing: -0.015em;
}

.page-about h3 {
  margin: 0 0 10px;
  font-size: 19px;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  margin-bottom: clamp(30px, 5vw, 52px);
}

.page-about .about-crumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--karst);
}

.page-about .about-crumb li + li::before {
  content: "/";
  margin-right: 10px;
  color: var(--karst);
}

.page-about .about-crumb a {
  color: var(--bone);
  text-decoration: none;
  border-bottom: 1px solid var(--hair);
  padding-bottom: 1px;
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 等高线纹理（贵州地域气质） ---------- */
.page-about .about-weave {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.3;
  background-image:
    repeating-radial-gradient(circle at 16% 24%, rgba(124, 138, 134, 0.55) 0 1px, transparent 1px 27px),
    repeating-radial-gradient(circle at 84% 76%, rgba(124, 138, 134, 0.38) 0 1px, transparent 1px 35px);
  -webkit-mask-image: linear-gradient(178deg, rgba(0, 0, 0, 0.85), transparent 78%);
  mask-image: linear-gradient(178deg, rgba(0, 0, 0, 0.85), transparent 78%);
}

.page-about .about-weave--soft {
  opacity: 0.18;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(26px, 5vw, 46px) clamp(58px, 9vw, 110px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(116deg, rgba(138, 92, 246, 0.42) 0%, rgba(138, 92, 246, 0) 48%),
    radial-gradient(120% 82% at 88% 4%, rgba(47, 243, 200, 0.2), transparent 62%);
  clip-path: polygon(0 0, 100% 0, 100% 58%, 44% 100%, 0 80%);
}

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

.page-about .about-hero__title {
  margin: 14px 0 22px;
  max-width: 20ch;
  font-size: clamp(36px, 7vw, 82px);
  line-height: 1.04;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

.page-about .about-hero__mark {
  display: inline;
  color: var(--cyan);
  box-shadow: inset 0 -0.16em 0 rgba(47, 243, 200, 0.22);
}

.page-about .about-hero__lead {
  max-width: 60ch;
  margin: 0 0 clamp(34px, 5vw, 54px);
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.85;
  color: rgba(255, 253, 247, 0.86);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--hair-soft);
  border-top: 1px solid var(--hair);
  border-bottom: 1px solid var(--hair);
}

.page-about .about-stat {
  padding: 20px 16px 22px 0;
  background: transparent;
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(28px, 4.6vw, 42px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .about-stat__unit {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--bone);
}

.page-about .about-stat__label {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--karst);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-sec {
  position: relative;
  padding-block: clamp(52px, 8vw, 108px);
}

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

.page-about .about-sec__no {
  display: block;
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-sec--paper {
  color: var(--ink);
}

.page-about .about-sec--paper h2,
.page-about .about-sec--paper h3 {
  color: var(--ink);
}

.page-about .about-sec--paper .about-sec__no {
  color: var(--cyan-deep);
}

.page-about .about-sec--paper .eyebrow {
  color: var(--violet-deep);
}

.page-about .about-head {
  max-width: 62ch;
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-about .about-head__lead {
  margin: 0;
  font-size: 16.5px;
  line-height: 1.8;
  color: rgba(255, 253, 247, 0.78);
}

.page-about .about-sec--paper .about-head__lead {
  color: rgba(10, 12, 11, 0.72);
}

/* ---------- 01 起点：主侧栏 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
}

.page-about .about-card {
  position: relative;
  padding: 24px 22px 26px;
  border: 1px solid var(--hair);
  border-radius: var(--radius-l);
  background: var(--green-2);
}

.page-about .about-card__key {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--karst);
}

.page-about .about-card__note {
  margin: 12px 0 24px;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(255, 253, 247, 0.76);
}

.page-about .about-card__note:last-child {
  margin-bottom: 0;
}

.page-about .about-card .figure {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .about-card .figure__value {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(38px, 6vw, 54px);
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-card .figure__unit {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--bone);
}

/* ---------- 02 团队 ---------- */
.page-about .about-team__shot {
  margin: 0 0 clamp(24px, 4vw, 40px);
  border-radius: var(--radius-l);
  overflow: hidden;
  border: 1px solid var(--hair-soft);
}

.page-about .about-team__shot img {
  width: 100%;
  height: clamp(220px, 42vw, 460px);
  object-fit: cover;
  filter: saturate(0.9) contrast(1.06);
}

.page-about .media-frame__cap {
  display: block;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--karst);
  background: rgba(10, 12, 11, 0.55);
}

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

.page-about .about-role {
  flex: 1 1 100%;
  padding: 22px 20px 24px;
  border: 1px solid var(--hair-soft);
  border-radius: var(--radius-m);
  background: var(--green-2);
  transition: border-color 200ms var(--ease), background-color 200ms var(--ease);
}

.page-about .about-role:hover,
.page-about .about-role:focus-within {
  border-color: rgba(47, 243, 200, 0.5);
  background: var(--green-3);
}

.page-about .about-role p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(255, 253, 247, 0.8);
}

.page-about .about-roles__note {
  margin: 20px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--amber);
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(255, 253, 247, 0.72);
}

/* ---------- 03 工序 ---------- */
.page-about .about-steps__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-about .about-steps__nav a {
  display: inline-block;
  padding: 9px 16px;
  border: 1px solid rgba(10, 12, 11, 0.18);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--ink);
  text-decoration: none;
  transition: background-color 160ms var(--ease), border-color 160ms var(--ease), color 160ms var(--ease);
}

.page-about .about-steps__nav a:hover,
.page-about .about-steps__nav a:focus-visible {
  background: var(--ink-green);
  border-color: var(--ink-green);
  color: var(--cyan);
}

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

.page-about .about-step {
  position: relative;
  padding: 24px 22px 26px;
  border-radius: var(--radius-l);
  background: var(--bone);
  border: 1px solid rgba(10, 12, 11, 0.09);
  box-shadow: 0 1px 0 rgba(10, 12, 11, 0.04);
  scroll-margin-top: 110px;
}

.page-about .about-step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  bottom: 22px;
  width: 3px;
  border-radius: 2px;
  background: var(--cyan-deep);
}

.page-about .about-step:nth-child(2)::before {
  background: var(--amber-deep);
}

.page-about .about-step:nth-child(3)::before {
  background: var(--violet-deep);
}

.page-about .about-step:nth-child(4)::before {
  background: var(--karst);
}

.page-about .about-step__no {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.24em;
  color: var(--karst);
}

.page-about .about-step p {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(10, 12, 11, 0.78);
}

/* ---------- 04 覆盖 ---------- */
.page-about .about-cover__shot {
  margin: 0 0 clamp(28px, 4vw, 46px);
  border-radius: var(--radius-l);
  overflow: hidden;
  border: 1px solid var(--hair-soft);
}

.page-about .about-cover__shot img {
  width: 100%;
  height: clamp(180px, 30vw, 340px);
  object-fit: cover;
}

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

.page-about .about-track__node {
  position: relative;
  padding: 20px 0 0;
  border-top: 3px solid var(--cyan);
  transition: transform 200ms var(--ease), border-color 200ms var(--ease);
}

.page-about .about-track__node:nth-child(2) {
  border-top-color: var(--amber);
}

.page-about .about-track__node:nth-child(3) {
  border-top-color: var(--violet);
}

.page-about .about-track__node:hover,
.page-about .about-track__node:focus-within {
  transform: translateY(-3px);
}

.page-about .about-track__node:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 6px;
}

.page-about .about-track__stage {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--karst);
}

.page-about .about-track__num {
  display: block;
  margin: 6px 0 4px;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(30px, 5vw, 44px);
  line-height: 1;
  color: rgba(255, 253, 247, 0.16);
}

.page-about .about-track__node h3 {
  color: var(--bone);
}

.page-about .about-track__node > p {
  margin: 0 0 14px;
  font-size: 14.8px;
  line-height: 1.8;
  color: rgba(255, 253, 247, 0.78);
}

.page-about .about-track__detail {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px dashed var(--hair);
  padding-top: 12px;
}

.page-about .about-track__detail li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: rgba(255, 253, 247, 0.6);
  transition: color 200ms var(--ease);
}

.page-about .about-track__node:hover .about-track__detail li,
.page-about .about-track__node:focus-within .about-track__detail li {
  color: var(--cyan);
}

.page-about .about-track__detail li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

/* ---------- 05 共创 ---------- */
.page-about .about-partners {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
}

.page-about .about-partner {
  padding: 26px 22px 28px;
  border: 1px solid var(--hair-soft);
  border-radius: var(--radius-l);
  background: var(--ink-green);
}

.page-about .about-partner--wide {
  background: linear-gradient(122deg, var(--violet-deep) 0%, var(--ink-green) 68%);
  border-color: rgba(138, 92, 246, 0.4);
}

.page-about .about-partner p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(255, 253, 247, 0.82);
}

.page-about .about-partner__meta {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 18px 0 0 !important;
  padding-top: 14px;
  border-top: 1px solid var(--hair);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--bone) !important;
}

.page-about .about-partner__meta .num {
  font-size: 30px;
  font-weight: 600;
  line-height: 1;
  color: var(--gold);
}

/* ---------- 06 值班室 ---------- */
.page-about .about-rooms {
  position: relative;
  overflow: hidden;
}

.page-about .about-rooms__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 50px);
  align-items: start;
}

.page-about .about-rooms__shot {
  margin: 0;
  border-radius: var(--radius-l);
  overflow: hidden;
  border: 1px solid var(--hair-soft);
}

.page-about .about-rooms__shot img {
  width: 100%;
  height: clamp(220px, 38vw, 420px);
  object-fit: cover;
  filter: grayscale(0.15) contrast(1.08);
}

/* ---------- 收尾 ---------- */
.page-about .about-next {
  padding-block: clamp(48px, 7vw, 88px);
}

.page-about .about-next__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.5vw, 40px);
  align-items: center;
}

.page-about .about-next__inner p {
  margin: 0;
  max-width: 52ch;
  font-size: 15.5px;
  line-height: 1.82;
  color: rgba(255, 253, 247, 0.78);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-stat {
    padding-inline: 18px;
  }

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

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

  .page-about .about-partner--wide {
    grid-column: span 2;
  }
}

@media (min-width: 900px) {
  .page-about {
    --about-rail: 78px;
  }

  .page-about .about-sec__inner {
    padding-inline-start: var(--about-rail);
  }

  .page-about .about-sec__no {
    position: absolute;
    left: 0;
    top: 6px;
    margin-bottom: 0;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: 0.38em;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-split__side {
    position: sticky;
    top: calc(var(--head-h) + 26px);
  }

  .page-about .about-roles {
    flex-wrap: nowrap;
  }

  .page-about .about-role--a {
    flex: 1 1 42%;
  }

  .page-about .about-role--b {
    flex: 1 1 33%;
  }

  .page-about .about-role--c {
    flex: 1 1 25%;
  }

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

  .page-about .about-rooms__grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-about .about-next__inner {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  }

  .page-about .about-next__acts {
    justify-content: flex-end;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero__title {
    max-width: 18ch;
  }

  .page-about .about-partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: stretch;
  }

  .page-about .about-partner--wide {
    grid-column: span 1;
    grid-row: span 1;
  }

  .page-about .about-partner--wide p {
    font-size: 15.5px;
  }
}
<<<END>>>