.page-about {
  --about-rail-w: 138px;
  --about-rail-gap: 44px;
  --about-stage-gap: 72px;
}

.page-about .about-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-5);
  min-width: 0;
}

.page-about .about-flow {
  min-width: 0;
}

/* ---------- 发展刻度栏 ---------- */
.page-about .about-rail {
  border-bottom: 1px solid var(--line-soft);
  padding-bottom: var(--sp-3);
  min-width: 0;
}

.page-about .about-rail__title {
  margin: 0 0 var(--sp-2);
  font-size: var(--fs-12);
  letter-spacing: var(--tracking-annot);
  color: var(--muted);
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 2px;
  display: flex;
  gap: var(--sp-5);
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-rail__list::-webkit-scrollbar {
  display: none;
}

.page-about .about-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: var(--sp-2);
  white-space: nowrap;
  text-decoration: none;
  color: var(--muted);
  transition: color .12s ease;
}

.page-about .about-rail__dot {
  display: none;
}

.page-about .about-rail__yr {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: var(--fs-18);
  line-height: 1;
  color: var(--soft);
  font-variant-numeric: tabular-nums;
  transition: color .12s ease;
}

.page-about .about-rail__cap {
  font-size: var(--fs-12);
  letter-spacing: var(--tracking-annot);
}

.page-about .about-rail__link:hover .about-rail__yr,
.page-about .about-rail__link:focus-visible .about-rail__yr {
  color: var(--cyan);
}

.page-about .about-rail__link:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 4px;
  border-radius: var(--r-xs);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: var(--sp-4) 0 var(--sp-7);
  min-width: 0;
}

.page-about .about-hero .crumb {
  margin-bottom: var(--sp-5);
}

.page-about .about-hero__eyebrow {
  margin: 0 0 var(--sp-4);
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 0 0 var(--sp-5);
  max-width: 17ch;
  font-size: clamp(30px, 6vw, 62px);
  font-weight: 800;
  line-height: var(--lh-tight);
  letter-spacing: -.02em;
  color: var(--white);
  overflow-wrap: anywhere;
}

.page-about .about-hero__lede {
  margin: 0 0 var(--sp-6);
  max-width: 60ch;
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--soft);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
}

/* ---------- 数据横条 ---------- */
.page-about .about-strip {
  margin-bottom: var(--sp-8);
  padding: var(--sp-4) 0;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(90deg, var(--white-04), transparent 72%);
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-strip::-webkit-scrollbar {
  display: none;
}

.page-about .about-strip__row {
  display: flex;
  align-items: baseline;
  gap: var(--sp-6);
  padding: 0 var(--sp-2);
  min-width: max-content;
}

.page-about .about-strip__cell {
  display: inline-flex;
  align-items: baseline;
  gap: var(--sp-2);
  white-space: nowrap;
}

.page-about .about-strip__num {
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: var(--fs-24);
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-strip__num--warm {
  color: var(--orange);
}

.page-about .about-strip__lab {
  font-size: var(--fs-13);
  letter-spacing: var(--tracking-annot);
  color: var(--muted);
}

/* ---------- 通用区块 ---------- */
.page-about .about-block {
  margin-bottom: var(--about-stage-gap);
  min-width: 0;
}

.page-about .about-block:last-of-type {
  margin-bottom: var(--sp-7);
}

.page-about .about-block__head {
  display: flex;
  align-items: baseline;
  gap: var(--sp-3);
  margin-bottom: var(--sp-5);
  padding-bottom: var(--sp-3);
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-block__idx {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: var(--fs-13);
  letter-spacing: .12em;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.page-about .about-block__title {
  margin: 0;
  font-size: clamp(22px, 3.2vw, 34px);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -.015em;
  color: var(--white);
  overflow-wrap: anywhere;
}

.page-about .about-block__text {
  margin: 0 0 var(--sp-5);
  max-width: 66ch;
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--soft);
}

.page-about .about-block__note {
  margin: var(--sp-5) 0 0;
  font-size: var(--fs-13);
  line-height: 1.9;
  color: var(--muted);
}

.page-about .about-block__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-16);
}

.page-about .about-block__note a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 三块业务 ---------- */
.page-about .about-cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-4);
}

.page-about .about-card {
  position: relative;
  padding: var(--sp-6) var(--sp-5) var(--sp-5);
  background: var(--ink-800);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  box-shadow: var(--shadow-paper);
  transition: transform .12s ease, border-color .12s ease;
}

.page-about .about-card:hover,
.page-about .about-card:focus-within {
  transform: translateY(-4px);
  border-color: var(--cyan);
}

.page-about .about-card__tape {
  position: absolute;
  top: -1px;
  left: var(--sp-5);
  display: inline-block;
  padding: 3px var(--sp-3);
  font-size: var(--fs-12);
  letter-spacing: var(--tracking-annot);
  color: var(--ink-900);
  background: var(--cyan);
  border-radius: 0 0 var(--r-xs) var(--r-xs);
}

.page-about .about-card__tape--warm {
  background: var(--orange);
  color: var(--white);
}

.page-about .about-card__title {
  margin: var(--sp-3) 0 var(--sp-3);
  font-size: var(--fs-24);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-about .about-card__desc {
  margin: 0 0 var(--sp-4);
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--soft);
}

.page-about .about-card__link {
  display: inline-block;
  font-size: var(--fs-13);
  letter-spacing: var(--tracking-annot);
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-16);
}

.page-about .about-card__link:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 图片框 ---------- */
.page-about .about-figure {
  margin: var(--sp-6) 0 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  overflow: hidden;
  background: var(--ink-800);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.85) contrast(1.05);
}

.page-about .about-figure figcaption {
  padding: var(--sp-3) var(--sp-5);
  font-size: var(--fs-12);
  letter-spacing: var(--tracking-annot);
  color: var(--muted);
  border-top: 1px solid var(--line-soft);
  background: var(--ink-900);
}

@media (min-width: 820px) {
  .page-about .about-figure--side {
    max-width: 78%;
  }
}

/* ---------- 两条产品线 ---------- */
.page-about .about-lines {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-4);
}

.page-about .about-lines__item {
  padding: var(--sp-5);
  background: var(--ink-800);
  border-left: 3px solid var(--line);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  transition: border-left-color .12s ease, background .12s ease;
}

.page-about .about-lines__item:hover {
  border-left-color: var(--cyan);
  background: var(--ink-700);
}

.page-about .about-lines__name {
  margin: 0 0 var(--sp-2);
  font-size: var(--fs-18);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-about .about-lines__desc {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--soft);
}

/* ---------- 更新与校验刻度 ---------- */
.page-about .about-track {
  margin-top: var(--sp-5);
  overflow-x: auto;
  scrollbar-width: thin;
  padding-bottom: var(--sp-3);
  -webkit-overflow-scrolling: touch;
}

.page-about .about-track__rail {
  position: relative;
  list-style: none;
  margin: 0;
  padding: var(--sp-7) 0 0;
  display: flex;
  min-width: max-content;
}

.page-about .about-track__rail::before {
  content: "";
  position: absolute;
  top: 55px;
  left: 6px;
  right: 24px;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), var(--orange));
  opacity: .5;
}

.page-about .about-track__step {
  position: relative;
  flex: 0 0 auto;
  width: 232px;
  padding-right: var(--sp-6);
}

.page-about .about-track__step::before {
  content: "";
  position: absolute;
  top: -22px;
  left: 0;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--ink-900);
  border: 2px solid var(--cyan);
}

.page-about .about-track__step--warm::before {
  border-color: var(--orange);
}

.page-about .about-track__name {
  display: block;
  margin-bottom: var(--sp-2);
  font-size: var(--fs-18);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-about .about-track__desc {
  display: block;
  font-size: var(--fs-13);
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 团队四格 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-3);
}

.page-about .about-team__cell {
  position: relative;
  padding: var(--sp-5);
  background: var(--ink-700);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: transform .12s ease, border-color .12s ease;
}

.page-about .about-team__cell:hover,
.page-about .about-team__cell:focus-within {
  transform: translateY(-4px);
  border-color: var(--cyan);
}

.page-about .about-team__no {
  display: block;
  margin-bottom: var(--sp-3);
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(42px, 7vw, 68px);
  line-height: .86;
  letter-spacing: -.05em;
  color: transparent;
  -webkit-text-stroke: 1px var(--line);
  font-variant-numeric: tabular-nums;
  transition: transform .14s ease, -webkit-text-stroke-color .14s ease, color .14s ease;
}

.page-about .about-team__cell--warm .about-team__no {
  -webkit-text-stroke-color: rgba(255, 106, 30, .5);
}

.page-about .about-team__cell:hover .about-team__no {
  transform: scale(1.08);
  color: var(--cyan-08);
  -webkit-text-stroke-color: var(--cyan);
}

.page-about .about-team__cell--warm:hover .about-team__no {
  color: var(--orange-10);
  -webkit-text-stroke-color: var(--orange);
}

.page-about .about-team__name {
  margin: 0 0 var(--sp-2);
  font-size: var(--fs-18);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-about .about-team__desc {
  margin: 0;
  font-size: var(--fs-13);
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 合作生态环形图 ---------- */
.page-about .about-hub {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-6);
  align-items: center;
}

.page-about .about-hub__chart {
  width: 100%;
  max-width: 300px;
  margin: 0 auto;
}

.page-about .about-hub__chart svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.page-about .hub-orbit {
  fill: none;
  stroke: var(--line-soft);
  stroke-width: 1;
}

.page-about .hub-dot {
  transform-box: fill-box;
  transform-origin: center;
  transition: transform .14s ease, fill .14s ease;
}

.page-about .hub-dots--a .hub-dot { fill: var(--cyan); }
.page-about .hub-dots--b .hub-dot { fill: var(--white); }
.page-about .hub-dots--c .hub-dot { fill: var(--muted); }
.page-about .hub-dots--d .hub-dot { fill: var(--yellow); }
.page-about .hub-dot--soft { fill: var(--line); }

.page-about .about-hub__keys {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
}

.page-about .about-hub__key {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr);
  column-gap: var(--sp-3);
  row-gap: var(--sp-1);
  align-items: center;
  padding: var(--sp-3) var(--sp-4);
  border-left: 2px solid var(--line);
  background: var(--white-04);
  border-radius: 0 var(--r-xs) var(--r-xs) 0;
  transition: border-left-color .14s ease, background .14s ease;
}

.page-about .about-hub__dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
}

.page-about .about-hub__key--b .about-hub__dot { background: var(--white); }
.page-about .about-hub__key--c .about-hub__dot { background: var(--muted); }
.page-about .about-hub__key--d .about-hub__dot { background: var(--yellow); }

.page-about .about-hub__kname {
  font-size: var(--fs-16);
  font-weight: 800;
  color: var(--white);
}

.page-about .about-hub__kdesc {
  grid-column: 2;
  font-size: var(--fs-13);
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-hub__key:hover {
  border-left-color: var(--orange);
  background: var(--orange-10);
}

.page-about .about-hub:has(.about-hub__key--a:hover) [data-dots="a"] .hub-dot,
.page-about .about-hub:has(.about-hub__key--b:hover) [data-dots="b"] .hub-dot,
.page-about .about-hub:has(.about-hub__key--c:hover) [data-dots="c"] .hub-dot,
.page-about .about-hub:has(.about-hub__key--d:hover) [data-dots="d"] .hub-dot {
  fill: var(--orange);
  transform: scale(1.5);
}

/* ---------- 服务与响应 ---------- */
.page-about .about-svc {
  border-top: 1px solid var(--line-soft);
}

.page-about .about-svc__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-2);
  padding: var(--sp-4) 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-svc__key {
  font-size: var(--fs-16);
  font-weight: 800;
  color: var(--white);
}

.page-about .about-svc__val {
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--soft);
}

/* ---------- 长期保障四柱 ---------- */
.page-about .about-pillars {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-3);
}

.page-about .about-pillar {
  padding: var(--sp-6) var(--sp-4) var(--sp-5);
  background: var(--ink-800);
  border: 1px solid var(--line-soft);
  border-top: 2px solid var(--cyan);
  border-radius: var(--r-sm);
}

.page-about .about-pillar--warm {
  border-top-color: var(--orange);
}

.page-about .about-pillar__num {
  display: block;
  margin-bottom: var(--sp-3);
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(38px, 6vw, 56px);
  line-height: .9;
  letter-spacing: -.04em;
  color: var(--white);
  font-variant-numeric: tabular-nums;
}

.page-about .about-pillar--warm .about-pillar__num {
  color: var(--orange);
}

.page-about .about-pillar__name {
  margin: 0 0 var(--sp-2);
  font-size: var(--fs-16);
  font-weight: 800;
  color: var(--white);
}

.page-about .about-pillar__desc {
  margin: 0;
  font-size: var(--fs-13);
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 结尾行动区 ---------- */
.page-about .about-cta {
  margin-top: var(--sp-8);
  padding: var(--sp-7) var(--sp-5);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background:
    radial-gradient(130% 150% at 100% 0%, var(--orange-10), transparent 62%),
    var(--ink-800);
}

.page-about .about-cta__title {
  margin: 0 0 var(--sp-4);
  font-size: clamp(24px, 3.6vw, 38px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.015em;
  color: var(--white);
}

.page-about .about-cta__text {
  margin: 0 0 var(--sp-6);
  max-width: 56ch;
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--soft);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 720px) {
  .page-about .about-svc__row {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: var(--sp-5);
    align-items: baseline;
  }

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

@media (min-width: 760px) {
  .page-about .about-cards {
    grid-template-columns: 1.25fr 1fr 1.05fr;
    gap: var(--sp-4);
  }

  .page-about .about-cards > *:nth-child(2) {
    margin-top: 24px;
  }

  .page-about .about-cards > *:nth-child(3) {
    margin-top: 46px;
  }

  .page-about .about-team {
    grid-template-columns: 1.35fr 1fr 1fr 1.2fr;
    gap: var(--sp-3);
  }

  .page-about .about-team__cell:nth-child(2) { margin-top: 22px; }
  .page-about .about-team__cell:nth-child(3) { margin-top: 44px; }
  .page-about .about-team__cell:nth-child(4) { margin-top: 12px; }

  .page-about .about-pillars {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--sp-3);
  }

  .page-about .about-pillars > *:nth-child(2) { margin-top: 20px; }
  .page-about .about-pillars > *:nth-child(4) { margin-top: 20px; }

  .page-about .about-cta {
    padding: var(--sp-8) var(--sp-7);
  }
}

@media (min-width: 900px) {
  .page-about .about-hub {
    grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
    gap: var(--sp-8);
  }

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

@media (min-width: 1000px) {
  .page-about .about-shell {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    column-gap: var(--about-rail-gap);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 32px);
    border-bottom: 0;
    padding-bottom: 0;
    padding-top: var(--sp-5);
  }

  .page-about .about-rail__title {
    margin-bottom: var(--sp-5);
  }

  .page-about .about-rail__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
    position: relative;
  }

  .page-about .about-rail__list::before {
    content: "";
    position: absolute;
    left: 5px;
    top: 12px;
    bottom: 12px;
    width: 1px;
    background: linear-gradient(180deg, var(--cyan-16), var(--line-soft) 70%, transparent);
  }

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

  .page-about .about-rail__link {
    display: grid;
    grid-template-columns: 14px minmax(0, 1fr);
    column-gap: var(--sp-3);
    align-items: center;
    padding: var(--sp-3) 0;
    white-space: normal;
  }

  .page-about .about-rail__dot {
    display: block;
    grid-row: 1 / span 2;
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: var(--ink-900);
    border: 1px solid var(--line);
    transition: border-color .12s ease, box-shadow .12s ease;
  }

  .page-about .about-rail__link:hover .about-rail__dot,
  .page-about .about-rail__link:focus-visible .about-rail__dot {
    border-color: var(--cyan);
    box-shadow: 0 0 0 3px var(--cyan-08);
  }

  .page-about .about-rail__yr {
    grid-column: 2;
    font-size: var(--fs-16);
  }

  .page-about .about-rail__cap {
    grid-column: 2;
    font-size: var(--fs-12);
    color: var(--muted);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-card,
  .page-about .about-team__cell,
  .page-about .about-team__no,
  .page-about .hub-dot,
  .page-about .about-rail__dot {
    transition: none;
  }

  .page-about .about-card:hover,
  .page-about .about-team__cell:hover,
  .page-about .about-team__cell:hover .about-team__no,
  .page-about .about-hub:has(.about-hub__key--a:hover) [data-dots="a"] .hub-dot,
  .page-about .about-hub:has(.about-hub__key--b:hover) [data-dots="b"] .hub-dot,
  .page-about .about-hub:has(.about-hub__key--c:hover) [data-dots="c"] .hub-dot,
  .page-about .about-hub:has(.about-hub__key--d:hover) [data-dots="d"] .hub-dot {
    transform: none;
  }
}
<<<END>>>