.page-about {
  --about-rule: rgba(62, 74, 82, 0.16);
  --about-rule-strong: rgba(62, 74, 82, 0.3);
  --about-rule-light: rgba(233, 241, 245, 0.14);
  background: var(--paper);
  color: var(--ink);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  background: var(--paper);
  padding: 1rem 0;
  border-bottom: 1px solid var(--about-rule);
}
.page-about .about-crumb .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.78rem;
}
.page-about .about-crumb .breadcrumb__link {
  color: var(--stone);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}
.page-about .about-crumb .breadcrumb__link:hover,
.page-about .about-crumb .breadcrumb__link:focus-visible {
  color: var(--cyan-ink);
}
.page-about .about-crumb .breadcrumb__sep {
  color: var(--moss);
}
.page-about .about-crumb .breadcrumb__current {
  color: var(--ink);
  font-weight: 600;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background: var(--ink);
  color: var(--text-light);
  padding: clamp(2.25rem, 6vw, 4.5rem) 0 clamp(2.75rem, 7vw, 5.5rem);
  overflow: hidden;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -18%;
  width: 62%;
  height: 120%;
  background: radial-gradient(circle at 45% 40%, rgba(123, 77, 255, 0.26), transparent 64%);
  pointer-events: none;
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(35, 213, 230, 0.55), transparent);
}
.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(1.75rem, 5vw, 3.5rem);
}
.page-about .about-hero__eyebrow {
  display: inline-flex;
  align-items: baseline;
  gap: 0.6rem;
  margin: 0;
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  color: rgba(233, 241, 245, 0.66);
}
.page-about .about-hero__eyebrow .mono {
  font-family: var(--font-mono);
  color: var(--cyan);
}
.page-about .about-hero__title {
  margin: 1rem 0 1.35rem;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(2.35rem, 9vw, 5.2rem);
  line-height: 1;
  letter-spacing: -0.025em;
}
.page-about .about-hero__accent {
  color: var(--cyan);
  display: inline-block;
  padding-bottom: 0.06em;
  border-bottom: 0.06em solid rgba(255, 138, 61, 0.7);
}
.page-about .about-hero__lede {
  max-width: 36ch;
  margin: 0 0 1.5rem;
  font-size: clamp(0.96rem, 2vw, 1.08rem);
  line-height: 1.8;
  color: rgba(233, 241, 245, 0.82);
}
.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-hero__tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  padding: 0.36rem 0.68rem;
  border: 1px solid var(--about-rule-light);
  border-radius: var(--r-s);
  color: rgba(233, 241, 245, 0.78);
}
.page-about .about-hero__tag:first-child {
  border-color: rgba(35, 213, 230, 0.45);
  color: var(--cyan);
}
.page-about .about-hero__figure {
  margin: 0;
}
.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--r-m) var(--r-s) var(--r-l) var(--r-s);
  border: 1px solid var(--about-rule-light);
}
.page-about .about-hero__cap {
  margin: 0.75rem 0 0;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: rgba(233, 241, 245, 0.55);
}
.page-about .about-hero__cap .mono {
  font-family: var(--font-mono);
  color: var(--orange);
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: end;
  }
}

/* ---------- 双栏骨架 ---------- */
.page-about .about-layout {
  display: grid;
  gap: clamp(1.75rem, 5vw, 3rem);
  padding: clamp(2.25rem, 6vw, 4.5rem) 0 clamp(2.75rem, 7vw, 5rem);
}

/* ---------- 章节索引 ---------- */
.page-about .about-toc {
  border-top: 2px solid var(--ink);
  padding-top: 0.85rem;
}
.page-about .about-toc__key {
  margin: 0 0 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--moss);
}
.page-about .about-toc__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.9rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .about-toc__list a {
  display: inline-flex;
  align-items: baseline;
  gap: 0.45rem;
  padding: 0.28rem 0.1rem;
  font-size: 0.84rem;
  color: var(--stone);
  text-decoration: none;
  transition: color 0.2s var(--ease);
}
.page-about .about-toc__list a:hover,
.page-about .about-toc__list a:focus-visible {
  color: var(--ink);
}
.page-about .about-toc__num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--orange);
}

@media (min-width: 960px) {
  .page-about .about-layout {
    grid-template-columns: 210px minmax(0, 1fr);
    align-items: start;
  }
  .page-about .about-toc {
    position: sticky;
    top: 6rem;
  }
  .page-about .about-toc__list {
    flex-direction: column;
    gap: 0;
  }
  .page-about .about-toc__list li {
    border-bottom: 1px solid var(--about-rule);
  }
  .page-about .about-toc__list a {
    display: flex;
    padding: 0.55rem 0.1rem;
  }
}

/* ---------- 正文章节 ---------- */
.page-about .about-sec {
  padding: clamp(1.6rem, 4vw, 2.6rem) 0;
  border-top: 1px solid var(--about-rule);
  scroll-margin-top: 6rem;
}
.page-about .about-sec:first-child {
  border-top: 0;
  padding-top: 0;
}
.page-about .about-sec__code {
  display: inline-block;
  margin-bottom: 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--moss);
}
.page-about .about-sec__title {
  margin: 0 0 1.1rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.35rem, 3.6vw, 1.95rem);
  line-height: 1.3;
  letter-spacing: -0.01em;
  max-width: 24ch;
}
.page-about .about-sec__body {
  display: grid;
  gap: 1.15rem;
}
.page-about .about-sec__main p,
.page-about .about-sec__lead {
  margin: 0 0 0.9rem;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--stone);
}
.page-about .about-sec__main p:last-child,
.page-about .about-sec__lead:last-child {
  margin-bottom: 0;
}
.page-about .about-sec__lead {
  color: var(--ink-2);
}
@media (min-width: 800px) {
  .page-about .about-sec__body--split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 15rem);
    gap: clamp(1.5rem, 4vw, 2.5rem);
    align-items: start;
  }
}

/* ---------- 旁注 ---------- */
.page-about .about-note {
  border-left: 3px solid var(--moss);
  background: var(--mist);
  border-radius: 0 var(--r-m) var(--r-m) 0;
  padding: 1rem 1.1rem;
}
.page-about .about-note--moss {
  border-left-color: var(--clay);
  background: rgba(221, 232, 223, 0.62);
}
.page-about .about-note__key {
  margin: 0 0 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan-ink);
}
.page-about .about-note--moss .about-note__key {
  color: var(--clay);
}
.page-about .about-note p {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.75;
  color: var(--ink-2);
}
.page-about .about-note__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}
.page-about .about-note__list li {
  position: relative;
  padding-left: 0.9rem;
  font-size: 0.82rem;
  line-height: 1.65;
  color: var(--ink-2);
}
.page-about .about-note__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--moss);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0 0 0 1.6rem;
  border-left: 1px solid var(--about-rule-strong);
}
.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 1.8rem;
}
.page-about .about-timeline__item:last-child {
  padding-bottom: 0.4rem;
}
.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: calc(-1.6rem - 5.5px);
  top: 0.28rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--moss);
  transition: background 0.22s var(--ease), border-color 0.22s var(--ease),
    transform 0.22s var(--ease);
}
.page-about .about-timeline__item:hover::before {
  background: var(--orange);
  border-color: var(--orange);
  transform: scale(1.18);
}
.page-about .about-timeline__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: var(--clay);
  margin-bottom: 0.2rem;
}
.page-about .about-timeline__head {
  margin: 0 0 0.35rem;
  font-family: var(--font-heading);
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: -0.005em;
  color: var(--ink);
}
.page-about .about-timeline__body {
  margin: 0;
  max-width: 46ch;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--stone);
}

/* ---------- 图 ---------- */
.page-about .about-figure {
  margin: 1.75rem 0 0;
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--r-m);
  border: 1px solid var(--about-rule);
}
.page-about .about-figure--wide img {
  aspect-ratio: 2 / 1;
}
.page-about .about-figure__cap {
  margin: 0.7rem 0 0;
  font-size: 0.74rem;
  line-height: 1.6;
  color: var(--stone);
}
.page-about .about-figure__cap .mono {
  font-family: var(--font-mono);
  color: var(--orange);
  margin-right: 0.4rem;
}

/* ---------- 团队数字 ---------- */
.page-about .about-numgrid {
  display: grid;
  gap: 1px;
  margin-top: 1.6rem;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
  border-radius: var(--r-m);
  overflow: hidden;
}
.page-about .about-numgrid__cell {
  background: var(--paper);
  padding: 1.15rem 1.05rem;
}
.page-about .about-numgrid__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.65rem, 4.5vw, 2.15rem);
  line-height: 1;
  color: var(--ink);
}
.page-about .about-numgrid__num small {
  font-size: 0.46em;
  margin-left: 0.22em;
  color: var(--moss);
}
.page-about .about-numgrid__label {
  display: block;
  margin-top: 0.55rem;
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--stone);
}
@media (min-width: 640px) {
  .page-about .about-numgrid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 生态 ---------- */
.page-about .about-eco {
  display: grid;
  gap: 1rem;
  margin-top: 1.4rem;
}
.page-about .about-eco__item {
  background: var(--mist);
  border-radius: var(--r-m) var(--r-s) var(--r-l) var(--r-s);
  padding: 1.2rem 1.15rem;
  border-left: 3px solid var(--moss);
}
.page-about .about-eco__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.55rem;
  line-height: 1;
  color: var(--cyan-ink);
  margin-bottom: 0.45rem;
}
.page-about .about-eco__head {
  margin: 0 0 0.4rem;
  font-family: var(--font-heading);
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--ink);
}
.page-about .about-eco__item p {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.75;
  color: var(--ink-2);
}
@media (min-width: 700px) {
  .page-about .about-eco {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.25rem;
  }
}

.page-about .about-honor {
  margin-top: 1.5rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--about-rule);
}
.page-about .about-honor__key {
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--clay);
}
.page-about .about-honor__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}
.page-about .about-honor__list li {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--ink-2);
}
.page-about .about-honor__year {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--moss);
  flex: none;
}

/* ---------- 服务数据 ---------- */
.page-about .about-reach {
  display: grid;
  gap: 1.25rem;
  margin-top: 1.5rem;
  padding: clamp(1.35rem, 4vw, 2.2rem);
  background: var(--ink-2);
  color: var(--text-light);
  border-radius: var(--r-l) var(--r-s) var(--r-l) var(--r-s);
}
.page-about .about-reach__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.85rem, 5.5vw, 2.6rem);
  line-height: 1;
  color: var(--cyan);
}
.page-about .about-reach__num small {
  font-size: 0.42em;
  margin-left: 0.24em;
  color: rgba(233, 241, 245, 0.7);
}
.page-about .about-reach__label {
  display: block;
  margin-top: 0.55rem;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: rgba(233, 241, 245, 0.72);
}
@media (min-width: 680px) {
  .page-about .about-reach {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
  }
}

/* ---------- 行动区 ---------- */
.page-about .about-cta {
  display: grid;
  gap: 1.25rem;
  margin-top: 1.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--about-rule);
}
.page-about .about-cta__head {
  margin: 0 0 0.5rem;
  font-family: var(--font-heading);
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--ink);
}
.page-about .about-cta__text p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--stone);
}
.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  align-items: center;
}
@media (min-width: 760px) {
  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 2rem;
  }
}

/* ---------- 延伸链接 ---------- */
.page-about .about-links {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--about-rule);
}
.page-about .about-links li {
  border-bottom: 1px solid var(--about-rule);
}
.page-about .about-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem 0.15rem;
  font-size: 0.86rem;
  color: var(--stone);
  text-decoration: none;
  transition: color 0.2s var(--ease), padding-left 0.2s var(--ease);
}
.page-about .about-links a::after {
  content: "→";
  font-family: var(--font-mono);
  color: var(--moss);
  transition: transform 0.2s var(--ease);
}
.page-about .about-links a:hover,
.page-about .about-links a:focus-visible {
  color: var(--ink);
  padding-left: 0.35rem;
}
.page-about .about-links a:hover::after,
.page-about .about-links a:focus-visible::after {
  transform: translateX(3px);
}

/* ---------- 显现 ---------- */
.page-about [data-reveal] {
  opacity: 1;
}
@media (prefers-reduced-motion: no-preference) {
  .page-about [data-reveal].is-visible {
    animation: about-rise 0.42s var(--ease) both;
  }
}
@keyframes about-rise {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 窄屏收尾 ---------- */
@media (max-width: 400px) {
  .page-about .about-sec__title {
    max-width: none;
  }
  .page-about .about-cta__actions .btn {
    width: 100%;
    text-align: center;
  }
}
<<<END>>>