.page-about {
  --about-axis-w: 128px;
  --about-ms-cyan: var(--cyan);
  --about-ms-gold: var(--gold);
  --about-ms-violet: var(--violet);
  --about-ms-sky: var(--sky);
  --about-ms-orange: var(--orange);
  color: var(--mist);
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background:
    radial-gradient(120% 90% at 8% 0%, rgba(53, 242, 208, 0.15) 0%, rgba(53, 242, 208, 0) 58%),
    radial-gradient(90% 80% at 94% 16%, rgba(255, 138, 61, 0.13) 0%, rgba(255, 138, 61, 0) 62%),
    var(--ink);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(143, 167, 159, 0.09) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(143, 167, 159, 0.09) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.7), transparent 78%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.7), transparent 78%);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  padding: clamp(20px, 4vw, 36px) 0 clamp(40px, 7vw, 76px);
}

.page-about .about-hero__eyebrow {
  margin: clamp(30px, 6vw, 58px) 0 18px;
  color: var(--cyan);
}

.page-about .about-hero h1 {
  margin: 0 0 clamp(18px, 3vw, 28px);
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.9rem, 6.4vw, 4.2rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.page-about .about-hero__lede {
  max-width: 46ch;
  margin: 0;
  color: rgba(234, 244, 239, 0.82);
  font-size: clamp(0.98rem, 1.8vw, 1.1rem);
  line-height: 1.8;
}

/* ---------- 首屏目录 ---------- */
.page-about .about-toc {
  list-style: none;
  margin: clamp(34px, 6vw, 62px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--line);
}

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

.page-about .about-toc__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 15px 14px 7px;
  color: var(--mist);
  text-decoration: none;
  font-size: 0.92rem;
  transition: color 160ms var(--ease);
}

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

.page-about .about-toc__link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -3px;
  color: var(--cyan);
}

.page-about .about-toc__num {
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-about .about-toc__note {
  margin: 0 14px;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 0.76rem;
  line-height: 1.55;
  color: var(--sage);
  transition: max-height 200ms var(--ease), opacity 200ms var(--ease), margin-bottom 200ms var(--ease);
}

.page-about .about-toc__item:hover .about-toc__note,
.page-about .about-toc__item:focus-within .about-toc__note {
  max-height: 5em;
  opacity: 1;
  margin-bottom: 14px;
}

/* ---------- 章节骨架 ---------- */
.page-about .about-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  padding: clamp(32px, 5vw, 56px) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-row__index {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-about .about-row__num {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-about .about-row__rule {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, rgba(53, 242, 208, 0.55), rgba(143, 167, 159, 0.16));
}

.page-about .about-row__kicker {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.16em;
  color: var(--sage);
}

.page-about .about-h2 {
  margin: 0 0 clamp(16px, 2.6vw, 24px);
  max-width: 26ch;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.35rem, 3.4vw, 2rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .about-intro {
  margin: 0 0 clamp(18px, 3vw, 26px);
  max-width: 44ch;
  font-size: 0.96rem;
  line-height: 1.8;
  color: rgba(234, 244, 239, 0.8);
}

/* ---------- 正文与配图 ---------- */
.page-about .about-cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3vw, 34px);
}

.page-about .about-copy p {
  margin: 0 0 1em;
  max-width: 40ch;
  font-size: clamp(0.94rem, 1.6vw, 1.02rem);
  line-height: 1.82;
  color: rgba(234, 244, 239, 0.8);
}

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

.page-about .about-copy .about-copy__lead {
  color: var(--mist);
  font-size: clamp(0.98rem, 1.8vw, 1.08rem);
}

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

.page-about .about-figure img {
  width: 100%;
  object-fit: cover;
  border: 1px solid var(--line);
  background: var(--panel);
  transition: border-color 200ms var(--ease);
}

.page-about .about-figure:hover img {
  border-color: var(--line-strong);
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  padding-left: 10px;
  border-left: 2px solid var(--cyan);
  font-size: 0.76rem;
  line-height: 1.65;
  color: var(--sage);
}

.page-about .about-figure--wide {
  margin: 0 0 clamp(22px, 3.5vw, 32px);
}

/* ---------- 工序流水线 ---------- */
.page-about .about-flow {
  list-style: none;
  margin: 0 0 clamp(22px, 3.5vw, 32px);
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-flow__item {
  background: var(--panel-deep);
  padding: 20px 18px 22px;
  transition: background 160ms var(--ease);
}

.page-about .about-flow__item:hover {
  background: var(--panel);
}

.page-about .about-flow__step {
  display: inline-block;
  margin-bottom: 12px;
  padding: 2px 8px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--ink);
  background: var(--cyan);
}

.page-about .about-flow__item--gold .about-flow__step {
  background: var(--gold);
}

.page-about .about-flow__item--orange .about-flow__step {
  background: var(--orange);
}

.page-about .about-flow__item--mint .about-flow__step {
  background: var(--mint);
}

.page-about .about-flow__item h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--mist);
}

.page-about .about-flow__item p {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.72;
  color: var(--sage);
}

.page-about .about-rhythm {
  margin: 0;
  padding: 18px 18px 18px 20px;
  border-left: 3px solid var(--orange);
  background: linear-gradient(90deg, rgba(255, 138, 61, 0.12), rgba(255, 138, 61, 0));
  font-size: 0.93rem;
  line-height: 1.82;
  color: var(--mist);
}

/* ---------- 覆盖与伙伴 ---------- */
.page-about .about-scale {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 20px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: var(--sage);
}

.page-about .about-scale__sep {
  color: var(--line-strong);
}

.page-about .about-net {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .about-net__node {
  position: relative;
  padding: 18px 16px 16px;
  border: 1px solid var(--line);
  background: var(--panel-deep);
  transition: border-color 180ms var(--ease), background 180ms var(--ease);
}

.page-about .about-net__node::before {
  content: "";
  position: absolute;
  top: 16px;
  right: 16px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--dot, var(--cyan));
}

.page-about .about-net__node--cyan { --dot: var(--cyan); }
.page-about .about-net__node--orange { --dot: var(--orange); }
.page-about .about-net__node--violet { --dot: var(--violet); }

.page-about .about-net__node:hover,
.page-about .about-net__node:focus-within {
  border-color: var(--line-strong);
  background: var(--panel);
}

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

.page-about .about-net__count {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.45rem;
  line-height: 1;
  color: var(--mist);
  margin-bottom: 6px;
}

.page-about .about-net__label {
  display: block;
  font-size: 0.9rem;
  color: var(--mist);
}

.page-about .about-net__note {
  display: block;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 0.78rem;
  line-height: 1.62;
  color: var(--sage);
  transition: max-height 200ms var(--ease), opacity 200ms var(--ease), margin-top 200ms var(--ease);
}

.page-about .about-net__node:hover .about-net__note,
.page-about .about-net__node:focus-within .about-net__note {
  max-height: 7em;
  opacity: 1;
  margin-top: 8px;
}

/* ---------- 里程碑刻度 ---------- */
.page-about .about-milestones {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
}

.page-about .about-ms {
  position: relative;
  padding: 22px 0 22px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-ms::before {
  content: "";
  position: absolute;
  top: -4px;
  left: 0;
  width: 7px;
  height: 7px;
  background: var(--ms, var(--cyan));
  transition: transform 160ms var(--ease);
}

.page-about .about-ms:hover::before {
  transform: scale(1.6);
}

.page-about .about-ms--cyan { --ms: var(--cyan); }
.page-about .about-ms--gold { --ms: var(--gold); }
.page-about .about-ms--violet { --ms: var(--violet); }
.page-about .about-ms--sky { --ms: var(--sky); }
.page-about .about-ms--orange { --ms: var(--orange); }

.page-about .about-ms__year {
  display: block;
  font-family: var(--font-mono);
  font-size: 1rem;
  letter-spacing: 0.05em;
  color: var(--mist);
  margin-bottom: 6px;
}

.page-about .about-ms__title {
  display: block;
  margin-bottom: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ms, var(--cyan));
}

.page-about .about-ms p {
  margin: 0;
  max-width: 30ch;
  font-size: 0.83rem;
  line-height: 1.72;
  color: var(--sage);
}

/* ---------- 团队区（图文顺序） ---------- */
.page-about .about-cols--reverse .about-figure {
  order: -1;
}

/* ---------- 收尾行动区 ---------- */
.page-about .about-cta {
  padding: clamp(44px, 7vw, 84px) 0 clamp(40px, 6vw, 72px);
  border-top: 1px solid var(--line);
  background:
    linear-gradient(160deg, rgba(53, 242, 208, 0.1) 0%, rgba(11, 43, 38, 0) 58%),
    var(--panel-deep);
}

.page-about .about-cta__title {
  margin: 0 0 14px;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.35rem, 3.6vw, 2.1rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .about-cta__text {
  margin: 0 0 clamp(22px, 3.5vw, 30px);
  max-width: 52ch;
  font-size: 0.94rem;
  line-height: 1.82;
  color: rgba(234, 244, 239, 0.8);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-net {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 760px) {
  .page-about .about-toc {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    border-left: 1px solid var(--line);
  }

  .page-about .about-toc__item {
    border-bottom: 0;
    border-right: 1px solid var(--line);
  }

  .page-about .about-toc__item:last-child {
    border-right: 0;
  }
}

@media (min-width: 900px) {
  .page-about .about-row {
    grid-template-columns: var(--about-axis-w) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .about-row__index {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }

  .page-about .about-row__num {
    font-size: 2rem;
  }

  .page-about .about-row__rule {
    width: 100%;
    flex: none;
    background: linear-gradient(180deg, rgba(53, 242, 208, 0.55), rgba(143, 167, 159, 0.08));
  }

  .page-about .about-row__kicker {
    writing-mode: horizontal-tb;
  }

  .page-about .about-milestones {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-about .about-ms {
    padding: 26px 18px 0 0;
  }
}

@media (min-width: 1024px) {
  .page-about .about-cols {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-about .about-cols--reverse {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  }

  .page-about .about-cols--reverse .about-figure {
    order: 0;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-toc__note,
  .page-about .about-net__note,
  .page-about .about-ms::before,
  .page-about .about-figure img,
  .page-about .about-flow__item,
  .page-about .about-net__node,
  .page-about .about-toc__link {
    transition: none;
  }

  .page-about .about-ms:hover::before {
    transform: none;
  }
}
<<<PAGE_CSS_END>>>