.page-about {
  --about-rail: 140px;
  --about-line: rgba(43, 76, 66, 0.9);
  display: block;
  background:
    radial-gradient(900px 520px at 8% -6%, rgba(200, 255, 67, 0.07), transparent 62%),
    radial-gradient(720px 460px at 96% 4%, rgba(255, 176, 46, 0.06), transparent 60%),
    var(--ink);
  color: var(--body-text);
  overflow-x: hidden;
}

.page-about .about-section {
  padding-block: 56px;
}

.page-about a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 255, 67, 0.35);
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: 20px 44px;
}

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

.page-about .about-hero .breadcrumbs {
  margin-bottom: 28px;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(40px, 8.4vw, 92px);
  line-height: 0.98;
  letter-spacing: -0.03em;
  color: var(--chalk);
}

.page-about .about-hero__line {
  display: block;
}

.page-about .about-hero__line--outline {
  color: transparent;
  -webkit-text-stroke: 1.5px var(--lime);
  padding-bottom: 6px;
}

.page-about .about-hero__lede {
  max-width: 56ch;
  margin: 24px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--body-text);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-facts__item {
  background: var(--tunnel);
  padding: 16px 18px 18px;
}

.page-about .about-facts__item dt {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-about .about-facts__item dd {
  margin: 8px 0 0;
  font-size: 34px;
  line-height: 1;
  font-weight: 700;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .about-facts__unit {
  font-family: var(--font-body);
  font-size: 12px;
  font-weight: 500;
  color: var(--steel);
  margin-left: 6px;
  letter-spacing: 0;
}

/* ---------- 通用小标题 ---------- */
.page-about .about-section h2 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.4vw, 44px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--chalk);
}

.page-about .about-section h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.4;
  color: var(--chalk);
}

.page-about .about-section p {
  margin: 14px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--body-text);
}

/* ---------- 起点 ---------- */
.page-about .about-origin__layout {
  display: grid;
  gap: 32px;
}

.page-about .about-pillars {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-pillars li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 12px 16px;
  background: var(--tunnel);
  border-radius: var(--r-md);
  border-left: 3px solid var(--lime);
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--chalk);
}

.page-about .about-pillars .mono {
  font-size: 12px;
  color: var(--lime);
  letter-spacing: 0.1em;
}

.page-about .about-origin__figure {
  margin: 0;
}

.page-about .about-origin__figure figcaption {
  margin-top: 12px;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--steel);
}

.page-about .about-origin__figure .media-frame {
  border-radius: var(--r-xl);
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 流水线 ---------- */
.page-about .about-flow__head {
  display: grid;
  gap: 16px;
}

.page-about .about-flow__note {
  max-width: 52ch;
  color: var(--steel);
  font-size: 14.5px;
  border-left: 2px solid var(--amber);
  padding-left: 14px;
}

.page-about .about-pipeline {
  position: relative;
  margin-top: 32px;
  padding: 28px 0 0;
}

.page-about .about-pipeline__line {
  display: none;
  position: absolute;
  inset: 0 0 auto;
  width: 100%;
  height: 90px;
}

.page-about .about-pipeline__nodes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-pipeline__node {
  position: relative;
  padding: 22px 20px;
  background: linear-gradient(180deg, var(--panel), var(--tunnel));
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
}

.page-about .about-pipeline__node--mid {
  border-color: rgba(255, 176, 46, 0.55);
  box-shadow: 0 0 0 1px rgba(255, 176, 46, 0.12) inset;
}

.page-about .about-pipeline__stamp {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--lime);
  text-transform: uppercase;
}

.page-about .about-pipeline__node--mid .about-pipeline__stamp {
  color: var(--amber);
}

.page-about .about-pipeline__node p {
  margin-top: 6px;
  font-size: 14.5px;
  line-height: 1.75;
}

.page-about .about-flow__figure {
  margin: 28px 0 0;
}

.page-about .about-flow__figure .media-frame {
  border-radius: var(--r-xl);
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-about .about-flow__figure figcaption {
  margin-top: 12px;
  font-size: 12.5px;
  color: var(--steel);
  letter-spacing: 0.04em;
}

/* ---------- 团队 ---------- */
.page-about .about-team__lede {
  max-width: 54ch;
  color: var(--steel);
}

.page-about .about-team__grid {
  margin-top: 28px;
  display: grid;
  gap: 24px;
}

.page-about .about-team__figure .media-frame {
  border-radius: var(--r-xl);
  overflow: hidden;
  border: 1px solid var(--line);
}

.page-about .about-roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-roles__item {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 16px 18px;
  background: var(--tunnel);
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  border-radius: 24px;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.page-about .about-roles__item:hover,
.page-about .about-roles__item:focus-visible,
.page-about .about-roles__item:focus-within {
  transform: translateY(-2px);
  border-color: rgba(200, 255, 67, 0.6);
  background: var(--panel);
  outline: none;
}

.page-about .about-roles__num {
  font-size: 28px;
  line-height: 1.1;
  font-weight: 700;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .about-roles__text h3 {
  margin-bottom: 4px;
}

.page-about .about-roles__text p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--steel);
}

/* ---------- 时间轴 ---------- */
.page-about .about-track {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-track__item {
  display: grid;
  gap: 10px;
  padding: 24px 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-track__item:last-child {
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-track__year {
  font-size: 15px;
  letter-spacing: 0.12em;
  color: var(--lime);
}

.page-about .about-track__year .mono {
  font-variant-numeric: tabular-nums;
}

.page-about .about-track__main p {
  margin-top: 8px;
  font-size: 14.5px;
  line-height: 1.8;
}

.page-about .about-track__item--now .about-track__year {
  color: var(--amber);
}

.page-about .about-track__item--now {
  background: linear-gradient(90deg, rgba(255, 176, 46, 0.06), transparent 70%);
}

.page-about .about-milestone {
  margin-top: 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--tunnel);
  padding: 0 14px;
}

.page-about .about-milestone summary {
  cursor: pointer;
  list-style: none;
  padding: 12px 0;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--lime);
  min-height: 44px;
  display: flex;
  align-items: center;
}

.page-about .about-milestone summary::-webkit-details-marker {
  display: none;
}

.page-about .about-milestone summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  color: var(--steel);
}

.page-about .about-milestone[open] summary::after {
  content: "−";
  color: var(--lime);
}

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

/* ---------- 覆盖 ---------- */
.page-about .about-coverage {
  background: linear-gradient(180deg, transparent, rgba(18, 61, 51, 0.55) 22%, transparent);
}

.page-about .about-coverage__grid {
  display: grid;
  gap: 32px;
}

.page-about .about-coverage__stats {
  display: grid;
  gap: 18px;
}

.page-about .about-coverage__stat {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-bignum {
  font-family: var(--font-mono);
  font-size: clamp(52px, 11vw, 96px);
  line-height: 0.86;
  letter-spacing: -0.05em;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--lime);
  font-variant-numeric: tabular-nums;
  flex: 0 0 auto;
}

.page-about .about-bignum--solid {
  color: var(--amber);
  -webkit-text-stroke: 0;
}

.page-about .about-coverage__label {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--chalk);
}

.page-about .about-coverage__label span {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  font-weight: 400;
  color: var(--steel);
}

/* ---------- 合作生态 ---------- */
.page-about .about-ecosystem__lede {
  max-width: 54ch;
  color: var(--steel);
}

.page-about .about-eco-grid {
  margin-top: 28px;
  display: grid;
  gap: 14px;
}

.page-about .about-eco-card {
  padding: 22px 20px;
  background: var(--tunnel);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  position: relative;
  overflow: hidden;
}

.page-about .about-eco-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: linear-gradient(180deg, var(--lime), transparent);
  opacity: 0.5;
}

.page-about .about-eco-card h3 {
  margin-top: 12px;
}

.page-about .about-eco-card p {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--steel);
}

/* ---------- 昆明 ---------- */
.page-about .about-kunming__grid {
  display: grid;
  gap: 24px;
}

.page-about .about-contact-list {
  margin: 24px 0 0;
  border-top: 1px solid var(--line);
}

.page-about .about-contact-list__row {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-contact-list__row dt {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-about .about-contact-list__row dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--chalk);
  word-break: break-word;
}

.page-about .about-kunming__aside {
  padding: 24px 20px;
  background: var(--panel);
  border-radius: var(--r-xl);
  border: 1px solid var(--line);
}

.page-about .about-kunming__aside-label {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-about .about-clock {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-clock li {
  display: grid;
  gap: 2px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--chalk);
  padding-bottom: 12px;
  border-bottom: 1px dashed rgba(167, 184, 191, 0.28);
}

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

.page-about .about-clock .mono {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--lime);
}

.page-about .about-kunming__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  padding-block: 44px 64px;
}

.page-about .about-cta__inner {
  display: grid;
  gap: 24px;
  padding: 32px 24px;
  border-radius: var(--r-xl);
  background:
    radial-gradient(600px 260px at 88% 0%, rgba(200, 255, 67, 0.14), transparent 70%),
    var(--tunnel);
  border: 1px solid rgba(200, 255, 67, 0.24);
}

.page-about .about-cta__text h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--chalk);
}

.page-about .about-cta__text p {
  margin: 12px 0 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--steel);
}

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

.page-about .about-cta__actions .btn {
  border-bottom: 0;
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-about .about-section {
    padding-block: 72px;
  }

  .page-about .about-hero {
    padding-block: 28px 60px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: end;
    gap: 40px;
  }

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

  .page-about .about-origin__layout {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 44px;
    align-items: start;
  }

  .page-about .about-flow__head {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    align-items: end;
    gap: 32px;
  }

  .page-about .about-pipeline__nodes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .about-coverage__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 48px;
    align-items: center;
  }

  .page-about .about-eco-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-kunming__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.85fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .about-contact-list__row {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }

  .page-about .about-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 40px 36px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1024px) {
  .page-about .about-section {
    padding-block: 88px;
  }

  .page-about .about-hero__title {
    font-size: clamp(64px, 6.8vw, 108px);
  }

  .page-about .about-facts__item dd {
    font-size: 40px;
  }

  .page-about .about-pipeline__line {
    display: block;
  }

  .page-about .about-pipeline {
    padding-top: 76px;
  }

  .page-about .about-track__item {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 32px;
    padding: 30px 0;
  }

  .page-about .about-track__year {
    position: sticky;
    top: 100px;
    align-self: start;
    font-size: 17px;
  }

  .page-about .about-track__main {
    padding-bottom: 6px;
  }

  .page-about .about-origin__figure {
    position: relative;
    margin-top: 8px;
  }

  .page-about .about-coverage__stats {
    gap: 22px;
  }

  .page-about .about-coverage__stat {
    padding: 20px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-roles__item {
    transition: none;
  }

  .page-about .about-roles__item:hover {
    transform: none;
  }
}
<<<END>>>