.page-about {
  background: var(--night);
  color: var(--mist);
}

.page-about .about-crumbs {
  padding-top: 22px;
  padding-bottom: 4px;
}

.page-about .crumbs__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  font-size: 13px;
}

.page-about .crumbs__link {
  color: var(--mist-soft);
  text-decoration: none;
}

.page-about .crumbs__current {
  color: var(--cyan);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 40px 0 60px;
  background:
    radial-gradient(120% 90% at 82% 4%, rgba(53, 240, 200, .16), transparent 62%),
    linear-gradient(180deg, var(--night) 0%, var(--grass) 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(90deg, rgba(207, 246, 234, .035) 0 46px, transparent 46px 92px);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: 34px;
  align-items: center;
}

.page-about .about-eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(32px, 7vw, 54px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 60ch;
  font-size: 17px;
  line-height: 1.65;
  color: var(--mist-soft);
}

.page-about .about-hero__stats {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 36px;
  margin: 26px 0 28px;
  padding-top: 22px;
  border-top: 1px solid var(--line-dark);
}

.page-about .about-hero__stats .stat {
  display: grid;
  gap: 3px;
}

.page-about .about-hero__stats .stat__value {
  font-family: var(--font-mono);
  font-size: 30px;
  line-height: 1;
  color: var(--paper);
}

.page-about .about-hero__stats .stat--amber .stat__value {
  color: var(--amber);
}

.page-about .about-hero__stats .stat__label {
  font-size: 12px;
  color: var(--mist-soft);
}

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

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

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 18px;
  object-fit: cover;
}

/* ---------- 主体骨架：左侧刻度 / 右侧画布 ---------- */
.page-about .about-layout {
  display: grid;
  gap: 26px;
  padding-top: 44px;
  padding-bottom: 72px;
}

.page-about .about-rail {
  display: flex;
  align-items: center;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: thin;
}

.page-about .about-rail__list {
  display: flex;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-rail__item {
  flex: 0 0 auto;
  position: relative;
}

.page-about .about-rail__title,
.page-about .about-rail__meta {
  display: none;
}

.page-about .about-rail__link {
  display: block;
  padding: 7px 12px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--mist-soft);
  text-decoration: none;
  transition: color 160ms var(--ease), background 160ms var(--ease);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link.is-active {
  color: var(--cyan);
  background: rgba(53, 240, 200, .09);
}

.page-about .about-canvas > .about-section:last-child {
  margin-bottom: 0;
}

/* ---------- 区块 ---------- */
.page-about .about-section {
  position: relative;
  margin-bottom: var(--gap);
  padding: 32px 22px;
  border-radius: 20px;
  border: 1px solid var(--line-dark);
}

.page-about .about-section--ink {
  background: rgba(11, 42, 34, .82);
}

.page-about .about-section--grass {
  background: var(--grass);
}

.page-about .about-section--paper {
  background: var(--paper);
  border-color: var(--paper-line);
  color: var(--ink);
}

.page-about .about-section__title {
  position: relative;
  margin: 0 0 14px;
  padding-left: 18px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(23px, 4.6vw, 32px);
  line-height: 1.2;
  color: var(--paper);
}

.page-about .about-section__title::before {
  content: "";
  position: absolute;
  left: 0;
  top: .16em;
  width: 7px;
  height: 1.06em;
  background: var(--cyan);
  border-radius: 6px 11px 6px 10px / 10px 6px 11px 6px;
}

.page-about .about-section--paper .about-eyebrow {
  color: var(--gray);
}

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

.page-about .about-section--paper .about-section__title::before {
  background: var(--amber);
}

.page-about .about-section__lead,
.page-about .about-pillar p,
.page-about .about-role p,
.page-about .about-coverage__item p,
.page-about .about-archive__copy p {
  margin: 0;
  font-size: 16px;
  line-height: 1.65;
  color: var(--mist-soft);
}

.page-about .about-section__lead {
  max-width: 68ch;
  font-size: 17px;
}

.page-about .about-section--paper .about-section__lead,
.page-about .about-section--paper .about-pillar p,
.page-about .about-section--paper .about-coverage__item p,
.page-about .about-section--paper .about-segkey li {
  color: rgba(10, 15, 13, .76);
}

.page-about .about-section__foot {
  margin: 20px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-dark);
  font-size: 13px;
  line-height: 1.6;
  color: var(--gray);
}

.page-about .about-section--paper .about-section__foot {
  border-top-color: var(--paper-line);
}

/* ---------- 两条主线 ---------- */
.page-about .about-pillars {
  display: grid;
  gap: 22px;
  margin-top: 24px;
}

.page-about .about-pillar {
  padding-top: 16px;
  border-top: 1px solid var(--line-dark);
}

.page-about .about-pillar__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: .01em;
  color: var(--amber);
}

/* ---------- 数据链路 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

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

.page-about .about-flow__node {
  position: relative;
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  border: 1px solid var(--line-dark);
  border-radius: 14px;
  background: rgba(10, 15, 13, .34);
  outline: none;
  transition: border-color 160ms var(--ease), background 160ms var(--ease);
}

.page-about .about-flow__node:hover,
.page-about .about-flow__node:focus-visible {
  border-color: var(--cyan);
  background: rgba(53, 240, 200, .09);
}

.page-about .about-flow__step {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--amber);
}

.page-about .about-flow__name {
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-flow__tip {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--mist-soft);
}

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

.page-about .about-flow__media img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 16px;
  object-fit: cover;
}

/* ---------- 六个区间 ---------- */
.page-about .about-segments {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  align-items: end;
  gap: 8px;
  height: 190px;
  margin: 28px 0 20px;
}

.page-about .about-segment {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  height: 100%;
  gap: 8px;
}

.page-about .about-segment__bar {
  display: block;
  width: 100%;
  border-radius: 8px 8px 3px 3px;
  background: linear-gradient(180deg, var(--cyan), rgba(53, 240, 200, .22));
  transition: filter 160ms var(--ease);
}

.page-about .about-segment:nth-child(1) .about-segment__bar { height: 34%; }
.page-about .about-segment:nth-child(2) .about-segment__bar { height: 46%; }
.page-about .about-segment:nth-child(3) .about-segment__bar { height: 58%; }
.page-about .about-segment:nth-child(4) .about-segment__bar { height: 40%; }
.page-about .about-segment:nth-child(5) .about-segment__bar { height: 54%; }
.page-about .about-segment:nth-child(6) .about-segment__bar { height: 74%; }

.page-about .about-segment--peak .about-segment__bar {
  background: linear-gradient(180deg, var(--amber), rgba(240, 180, 41, .26));
}

.page-about .about-segment:hover .about-segment__bar {
  filter: brightness(1.12);
}

.page-about .about-segment .segment__label {
  font-family: var(--font-mono);
  font-size: 12px;
  text-align: center;
  color: var(--gray);
}

.page-about .about-segkey {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-segkey li {
  position: relative;
  padding-left: 16px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--mist-soft);
}

.page-about .about-segkey li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
}

.page-about .about-section--paper .about-segkey li::before {
  background: var(--amber);
}

/* ---------- 团队 ---------- */
.page-about .about-roles {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .about-role {
  padding-top: 16px;
  border-top: 1px solid var(--line-dark);
}

.page-about .about-role__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 800;
  color: var(--cyan);
}

/* ---------- 覆盖与合作 ---------- */
.page-about .about-coverage {
  display: grid;
  gap: 22px;
  margin-top: 26px;
}

.page-about .about-coverage__item {
  padding-left: 16px;
  border-left: 2px solid var(--amber);
}

.page-about .about-coverage__item .data-num {
  display: block;
  margin-bottom: 6px;
  color: var(--ink);
}

/* ---------- 版本与归档 ---------- */
.page-about .about-archive {
  display: grid;
  gap: 26px;
  margin-top: 22px;
  align-items: center;
}

.page-about .about-archive__copy {
  display: grid;
  gap: 14px;
  justify-items: start;
}

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

.page-about .about-archive__media img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 18px;
  object-fit: cover;
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  background:
    radial-gradient(90% 140% at 88% 10%, rgba(240, 180, 41, .16), transparent 60%),
    var(--night);
  border-top: 1px solid var(--line-dark);
}

.page-about .about-cta__inner {
  display: grid;
  gap: 24px;
  padding-top: 52px;
  padding-bottom: 60px;
}

.page-about .about-cta__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(24px, 4.4vw, 36px);
  line-height: 1.16;
  color: var(--paper);
}

.page-about .about-cta__copy p {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.65;
  color: var(--mist-soft);
}

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

/* ---------- 桌面端 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 56px 0 78px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 48px;
  }

  .page-about .about-section {
    padding: 44px 42px;
  }

  .page-about .about-pillars {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px;
  }

  .page-about .about-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }

  .page-about .about-flow__item:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 36px;
    left: 100%;
    width: 18px;
    height: 1px;
    background: var(--cyan);
    opacity: .65;
  }

  .page-about .about-flow__tip {
    position: absolute;
    left: 0;
    top: calc(100% + 10px);
    width: 236px;
    margin-top: 0;
    padding: 12px 14px;
    border: 1px solid var(--line-dark);
    border-radius: 12px;
    background: rgba(10, 15, 13, .95);
    color: var(--mist);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity 160ms var(--ease), transform 160ms var(--ease), visibility 160ms;
    z-index: 6;
  }

  .page-about .about-flow__node:hover .about-flow__tip,
  .page-about .about-flow__node:focus-within .about-flow__tip {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .page-about .about-roles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 30px;
  }

  .page-about .about-coverage {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 30px;
  }

  .page-about .about-archive {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 40px;
  }

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

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: var(--gap);
    align-items: start;
    padding-top: 56px;
  }

  .page-about .about-rail {
    display: block;
    overflow: visible;
    padding: 0 0 0 22px;
    position: sticky;
    top: 108px;
  }

  .page-about .about-rail::before {
    content: "";
    position: absolute;
    left: 8px;
    top: 6px;
    bottom: 6px;
    width: 1px;
    background: linear-gradient(180deg, var(--cyan) 0%, rgba(53, 240, 200, .3) 45%, rgba(207, 246, 234, .12) 100%);
  }

  .page-about .about-rail__title {
    display: block;
    margin: 0 0 14px;
    font-family: var(--font-head);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .1em;
    color: var(--gray);
  }

  .page-about .about-rail__list {
    display: grid;
    gap: 2px;
  }

  .page-about .about-rail__item {
    flex: none;
  }

  .page-about .about-rail__item::before {
    content: "";
    position: absolute;
    left: -22px;
    top: 50%;
    width: 9px;
    height: 1px;
    background: rgba(207, 246, 234, .28);
    transition: width 180ms var(--ease), background 180ms var(--ease);
  }

  .page-about .about-rail__item:hover::before,
  .page-about .about-rail__item:has(.is-active)::before {
    width: 16px;
    background: var(--cyan);
  }

  .page-about .about-rail__link {
    padding: 8px 10px;
  }

  .page-about .about-rail__meta {
    display: block;
    margin: 18px 0 0;
    padding-top: 12px;
    border-top: 1px solid var(--line-dark);
    font-size: 12px;
    line-height: 1.6;
    color: var(--gray);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail__link,
  .page-about .about-flow__node,
  .page-about .about-flow__tip,
  .page-about .about-segment__bar,
  .page-about .about-rail__item::before {
    transition: none;
  }
}
<<<END>>>