/* ============ 品牌主张页 ============ */
.page-about {
  --pct: 0%;
  --about-axis: 26px;
  --about-indent: 60px;
  position: relative;
  isolation: isolate;
  padding-bottom: 72px;
}

.page-about::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(138, 107, 255, .06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(138, 107, 255, .06) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(130% 62% at 50% 0%, #000 24%, transparent 80%);
  mask-image: radial-gradient(130% 62% at 50% 0%, #000 24%, transparent 80%);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: 26px;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  margin-top: 28px;
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--sans);
  font-size: clamp(28px, 6.2vw, 52px);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-about .about-hero .lede {
  margin-top: 18px;
  max-width: 62ch;
}

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

.page-about .about-stat {
  padding: 16px 14px 18px;
  background: var(--panel);
}

.page-about .about-stat dt {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--muted);
  margin: 0;
}

.page-about .about-stat dd {
  display: flex;
  align-items: baseline;
  gap: 3px;
  margin: 10px 0 0;
}

.page-about .about-stat__num {
  font-family: var(--cond);
  font-size: clamp(28px, 7vw, 46px);
  font-weight: 700;
  line-height: .95;
  letter-spacing: -.01em;
  color: var(--white);
  text-shadow: 0 0 18px rgba(53, 231, 210, .4);
}

.page-about .about-stat__unit {
  font-family: var(--sans);
  font-size: 13px;
  color: var(--muted);
}

.page-about .about-hero__figure {
  margin-top: 36px;
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  margin-top: 78px;
  scroll-margin-top: 128px;
}

.page-about .about-chapter__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .about-chapter__grid::before {
  content: "";
  position: absolute;
  left: var(--about-axis);
  top: 12px;
  bottom: -78px;
  width: 1px;
  background: linear-gradient(180deg, var(--line) 0%, rgba(34, 48, 74, .1) 100%);
}

.page-about .about-chapter:last-child .about-chapter__grid::before {
  bottom: 0;
}

.page-about .about-chapter__rail {
  position: relative;
  padding-left: var(--about-indent);
}

.page-about .about-chapter__body {
  padding-left: var(--about-indent);
  min-width: 0;
}

.page-about .about-node {
  position: absolute;
  left: calc(var(--about-axis) - 17px);
  top: 0;
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--ink);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--cyan);
}

.page-about .about-chapter__kicker {
  margin: 6px 0 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-about .about-chapter__body .section-title {
  margin: 10px 0 0;
}

.page-about .about-chapter__body .lede {
  margin-top: 14px;
  max-width: 64ch;
}

.page-about .about-chapter__body .prose {
  margin-top: 18px;
}

/* ---------- 发展节点 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-tl {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 22px 0;
  background: var(--ink);
}

.page-about .about-tl__year {
  margin: 0;
  font-family: var(--cond);
  font-size: 32px;
  font-weight: 700;
  line-height: .92;
  letter-spacing: -.01em;
  color: var(--white);
  text-shadow: 0 0 16px rgba(53, 231, 210, .3);
}

.page-about .about-tl__content h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--white);
}

.page-about .about-tl__content p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-timeline__figure {
  margin-top: 28px;
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  margin-top: 28px;
}

.page-about .about-team__bars {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .about-bar {
  display: grid;
  gap: 8px;
}

.page-about .about-bar__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-about .about-bar__label {
  font-size: 15.5px;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-bar__num {
  font-family: var(--cond);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  color: var(--white);
}

.page-about .about-bar__track {
  position: relative;
  display: block;
  height: 8px;
  border-radius: 4px;
  background: var(--panel-2);
  overflow: hidden;
}

.page-about .about-bar__fill {
  position: absolute;
  inset: 0 auto 0 0;
  width: var(--pct, 0%);
  border-radius: 4px;
  background: linear-gradient(90deg, var(--purple), var(--cyan));
  transition: filter .24s var(--ease);
}

.page-about .about-bar:hover .about-bar__fill {
  filter: brightness(1.3);
}

.page-about .about-bar__note {
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

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

/* ---------- 四步流程 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-step {
  position: relative;
  padding: 20px 20px 22px 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--panel);
  overflow: hidden;
}

.page-about .about-step__bar {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 6px;
  background: linear-gradient(180deg, var(--cyan), rgba(138, 107, 255, .35));
  transform: skewX(-3deg);
  transform-origin: left center;
}

.page-about .about-step__id {
  margin: 0;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-about .about-step h3 {
  margin: 8px 0 8px;
  font-size: 20px;
  font-weight: 600;
  color: var(--white);
}

.page-about .about-step p:last-child {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-inline-link {
  margin: 22px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-inline-link a {
  color: var(--cyan);
  border-bottom: 1px solid rgba(53, 231, 210, .35);
  text-decoration: none;
  transition: border-color .2s var(--ease);
}

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

/* ---------- 服务半径 ---------- */
.page-about .about-reach {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 30px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .about-reach__cell {
  padding: 20px 16px 22px;
  background: var(--panel);
}

.page-about .about-reach__num {
  margin: 0;
  font-family: var(--cond);
  font-size: clamp(34px, 8vw, 54px);
  font-weight: 700;
  line-height: .92;
  color: var(--white);
  text-shadow: 0 0 18px rgba(53, 231, 210, .38);
}

.page-about .about-reach__label {
  margin: 10px 0 0;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-about .about-reach__note {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-reach__prose {
  margin-top: 26px;
  max-width: 66ch;
}

/* ---------- 三件坚持 ---------- */
.page-about .about-commit {
  margin-top: 26px;
  border-bottom: 1px solid var(--line);
}

.page-about .about-commit__item {
  border-top: 1px solid var(--line);
}

.page-about .about-commit__item summary {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0;
  font-size: 19px;
  font-weight: 600;
  color: var(--white);
  cursor: pointer;
  list-style: none;
  transition: color .2s var(--ease);
}

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

.page-about .about-commit__item summary::marker {
  content: "";
}

.page-about .about-commit__item summary:hover {
  color: var(--cyan);
}

.page-about .about-commit__item[open] summary {
  color: var(--cyan);
}

.page-about .about-commit__idx {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-about .about-commit__panel {
  padding: 0 0 24px;
}

.page-about .about-commit__panel p {
  margin: 0;
  max-width: 66ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 结尾 ---------- */
.page-about .about-outro {
  margin-top: 96px;
}

.page-about .about-outro__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 响应式：平板及以上 ---------- */
@media (min-width: 720px) {
  .page-about .about-tl {
    grid-template-columns: 104px minmax(0, 1fr);
    column-gap: 28px;
    align-items: start;
    padding: 24px 0;
  }

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

  .page-about .about-step:nth-child(2) {
    margin-left: 34px;
  }

  .page-about .about-step:nth-child(3) {
    margin-left: 68px;
  }

  .page-about .about-step:nth-child(4) {
    margin-left: 102px;
  }
}

/* ---------- 响应式：桌面 ---------- */
@media (min-width: 900px) {
  .page-about {
    --about-indent: 64px;
  }

  .page-about .about-hero {
    padding-top: 40px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    column-gap: 48px;
    align-items: end;
    margin-top: 36px;
  }

  .page-about .about-hero__figure {
    margin-top: 46px;
  }

  .page-about .about-chapter {
    margin-top: 104px;
  }

  .page-about .about-chapter__grid {
    grid-template-columns: 150px minmax(0, 1fr);
    column-gap: 36px;
    row-gap: 0;
  }

  .page-about .about-chapter__grid::before {
    bottom: -104px;
  }

  .page-about .about-chapter__body {
    padding-left: 0;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1fr) 300px;
    column-gap: 40px;
    align-items: start;
  }

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

  .page-about .about-outro {
    margin-top: 132px;
  }
}

@media (min-width: 1120px) {
  .page-about .about-chapter__grid {
    grid-template-columns: 176px minmax(0, 1fr);
    column-gap: 48px;
  }

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

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-bar__fill,
  .page-about .about-inline-link a,
  .page-about .about-commit__item summary {
    transition: none;
  }
}
<<<END>>>