.page-about {
  --about-rail: 216px;
  --about-gap: clamp(1.5rem, 4vw, 3rem);
  background-color: var(--c-salt);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(1.6rem, 4vw, 2.6rem) clamp(2.4rem, 6vw, 4rem);
  background-image:
    radial-gradient(circle at 1px 1px, rgba(31, 78, 74, 0.16) 1px, transparent 0),
    linear-gradient(168deg, var(--c-salt) 0%, var(--c-mist) 62%, var(--c-salt) 100%);
  background-size: 22px 22px, 100% 100%;
  border-bottom: 3px solid var(--c-gold);
}

.page-about .about-hero .breadcrumb {
  margin-bottom: clamp(1.4rem, 3vw, 2.2rem);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  align-items: end;
}

.page-about .about-hero__text .eyebrow {
  display: block;
  margin-bottom: var(--sp-2);
  color: var(--c-coord);
}

.page-about .about-hero__text h1 {
  margin: 0 0 var(--sp-3);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.35rem, 8vw, 4.9rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--c-ink);
  text-wrap: balance;
}

.page-about .about-lead {
  margin: 0 0 var(--sp-4);
  max-width: 46ch;
  font-size: clamp(1rem, 1.6vw, 1.12rem);
  line-height: 1.78;
  color: var(--c-fog);
}

.page-about .about-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--sp-3) var(--sp-2);
  margin: 0;
  padding: var(--sp-3) 0 0;
  list-style: none;
  border-top: 1px solid var(--line-strong);
}

.page-about .about-metrics li {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.page-about .about-metrics .stat-num {
  font-size: clamp(1.35rem, 3vw, 1.85rem);
  font-weight: 700;
  color: var(--c-mineral);
  line-height: 1.1;
}

.page-about .about-metrics .stat-label {
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--c-fog);
}

.page-about .about-hero__media {
  display: block;
  margin: 0;
  width: 100%;
  aspect-ratio: 4 / 5;
  border-radius: var(--radius-l);
  overflow: hidden;
  background-color: var(--c-mist);
  box-shadow: var(--shadow-card);
}

.page-about .about-hero__media img {
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  display: block;
}

/* ---------- 主体骨架 ---------- */
.page-about .about-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.8rem, 5vw, 3rem);
  padding-block: clamp(2.2rem, 5vw, 3.4rem) clamp(3rem, 7vw, 5rem);
}

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

.page-about .about-toc__title {
  margin: 0 0 var(--sp-2);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-fog);
}

.page-about .about-toc__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-toc__link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.42rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background-color: var(--c-paper);
  color: var(--c-ink);
  font-size: 0.85rem;
  text-decoration: none;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-toc__link .mono {
  font-size: 0.7rem;
  color: var(--c-gold);
}

.page-about .about-toc__link:hover,
.page-about .about-toc__link:focus-visible {
  border-color: var(--c-mineral);
  background-color: var(--c-mist);
  color: var(--c-mineral);
}

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

/* ---------- 章节 ---------- */
.page-about .about-section {
  padding-block: clamp(1.9rem, 4.5vw, 2.9rem);
  border-top: 1px solid var(--line);
  scroll-margin-top: 1.5rem;
}

.page-about .about-section:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-section__head {
  display: flex;
  align-items: baseline;
  gap: var(--sp-2);
  margin-bottom: var(--sp-3);
}

.page-about .about-section__head .index-num {
  font-family: var(--font-mono);
  font-size: clamp(1.7rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1;
  color: var(--c-gold);
}

.page-about .about-section__head .section-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 3.6vw, 2.15rem);
  line-height: 1.2;
  color: var(--c-ink);
}

.page-about .about-section__intro {
  margin: 0 0 var(--sp-4);
  max-width: 58ch;
  font-size: 1rem;
  line-height: 1.78;
  color: var(--c-fog);
}

/* ---------- 01 起点 ---------- */
.page-about .about-prose p {
  margin: 0 0 var(--sp-3);
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--c-ink);
}

.page-about .about-prose .about-lede {
  font-family: var(--font-display);
  font-size: clamp(1.12rem, 2.2vw, 1.32rem);
  line-height: 1.7;
  color: var(--c-mineral);
}

.page-about .about-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 1px;
  margin: var(--sp-4) 0 0;
  padding: 0;
  list-style: none;
  background-color: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-m);
  overflow: hidden;
}

.page-about .about-strip li {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  padding: 0.85rem 1rem;
  background-color: var(--c-paper);
  font-size: 0.82rem;
  color: var(--c-fog);
}

.page-about .about-strip .mono {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--c-mineral);
}

/* ---------- 02 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 0.7rem;
  bottom: 1.4rem;
  width: 2px;
  background-image: linear-gradient(180deg, var(--c-gold) 0%, var(--c-mist) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  padding: 0 0 1.9rem 2.45rem;
}

.page-about .about-timeline__item:last-child {
  padding-bottom: 0;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.3rem;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background-color: var(--c-salt);
  border: 2px solid var(--c-gold);
  box-shadow: 0 0 0 4px var(--c-salt);
}

.page-about .about-timeline__num {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--c-coord);
}

.page-about .about-timeline__item h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: 1.14rem;
  font-weight: 700;
  color: var(--c-ink);
}

.page-about .about-timeline__item p {
  margin: 0;
  max-width: 56ch;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--c-fog);
}

/* ---------- 03 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-4);
}

.page-about .about-team__media {
  display: block;
  margin: 0;
  width: 100%;
  aspect-ratio: 3 / 2;
  border-radius: var(--radius-m);
  overflow: hidden;
  background-color: var(--c-mist);
}

.page-about .about-team__media img {
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  display: block;
}

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

.page-about .about-bar {
  display: grid;
  grid-template-columns: 4.9rem minmax(0, 1fr) 2rem;
  align-items: center;
  gap: 0.75rem;
  padding-top: 0.75rem;
}

.page-about .about-bar__label {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--c-ink);
}

.page-about .about-bar__track {
  display: block;
  height: 10px;
  border-radius: 999px;
  background-color: var(--c-mist);
  overflow: hidden;
}

.page-about .about-bar__fill {
  display: block;
  height: 100%;
  border-radius: 999px;
  background-image: linear-gradient(90deg, var(--c-mineral) 0%, var(--c-coord) 100%);
}

.page-about .about-bar--1 .about-bar__fill { width: 33.3%; }
.page-about .about-bar--2 .about-bar__fill { width: 22.2%; }
.page-about .about-bar--3 .about-bar__fill { width: 16.7%; }
.page-about .about-bar--4 .about-bar__fill { width: 27.8%; }

.page-about .about-bar__num {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--c-mineral);
  text-align: right;
}

.page-about .about-bar__note {
  margin: 0.3rem 0 0;
  padding-bottom: 0.75rem;
  border-bottom: 1px dashed var(--line);
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--c-fog);
}

.page-about .about-bar:last-of-type + .about-bar__note {
  border-bottom: 0;
}

/* ---------- 04 服务网络 ---------- */
.page-about .about-network__media {
  display: block;
  margin: 0 0 var(--sp-4);
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-m);
  overflow: hidden;
  background-color: var(--c-mineral);
}

.page-about .about-network__media img {
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  display: block;
}

.page-about .about-industries {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .about-industries li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.5rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-industries li p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.72;
  color: var(--c-fog);
}

.page-about .about-industries .tag {
  justify-self: start;
}

/* ---------- 05 节奏 ---------- */
.page-about .about-rhythm {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rhythm__item {
  position: relative;
  padding: 1.1rem 0 1.1rem 0.95rem;
  border-left: 3px solid var(--c-mist);
  border-bottom: 1px solid var(--line);
}

.page-about .about-rhythm__item:last-child {
  border-bottom: 0;
}

.page-about .about-rhythm__item:first-child {
  border-left-color: var(--c-gold);
}

.page-about .about-rhythm__cycle {
  display: inline-block;
  margin-bottom: 0.4rem;
  padding: 0.16rem 0.55rem;
  border-radius: var(--radius-s);
  background-color: var(--c-archive);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--c-ink);
}

.page-about .about-rhythm__item h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--c-ink);
}

.page-about .about-rhythm__item p {
  margin: 0;
  max-width: 58ch;
  font-size: 0.93rem;
  line-height: 1.75;
  color: var(--c-fog);
}

/* ---------- 06 荣誉 ---------- */
.page-about .about-honors {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.9rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-honor {
  padding: 1rem 1.1rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-m);
  background-color: var(--c-archive);
  cursor: default;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-honor:hover,
.page-about .about-honor:focus-visible {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card);
  outline: none;
}

.page-about .about-honor h3 {
  margin: 0.55rem 0 0;
  font-size: 0.98rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--c-ink);
}

.page-about .about-honor__note {
  max-height: 0;
  margin: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 0.85rem;
  line-height: 1.68;
  color: var(--c-fog);
  transition: max-height var(--dur) var(--ease), opacity var(--dur) var(--ease), margin-top var(--dur) var(--ease);
}

.page-about .about-honor:hover .about-honor__note,
.page-about .about-honor:focus-visible .about-honor__note {
  max-height: 7rem;
  margin-top: 0.55rem;
  opacity: 1;
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  margin-top: var(--sp-5);
  padding: clamp(1.5rem, 4vw, 2.4rem);
  border-radius: var(--radius-l);
  background-color: var(--c-mineral);
  background-image:
    radial-gradient(circle at 1px 1px, rgba(247, 244, 234, 0.16) 1px, transparent 0);
  background-size: 20px 20px;
  color: var(--c-salt);
}

.page-about .about-cta h2 {
  margin: 0 0 0.7rem;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3.4vw, 1.95rem);
  line-height: 1.3;
  color: var(--c-salt);
}

.page-about .about-cta p {
  margin: 0 0 var(--sp-4);
  max-width: 56ch;
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--on-dark);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-industries li {
    grid-template-columns: 5.5rem minmax(0, 1fr);
    align-items: baseline;
    gap: 1rem;
  }
}

@media (min-width: 860px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
    align-items: start;
  }

  .page-about .about-team__media {
    aspect-ratio: 4 / 5;
  }

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

  .page-about .about-section {
    scroll-margin-top: 2rem;
  }
}

@media (min-width: 1020px) {
  .page-about .about-shell {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4rem);
  }

  .page-about .about-toc {
    align-self: start;
    position: sticky;
    top: 1.75rem;
  }

  .page-about .about-toc__list {
    display: block;
  }

  .page-about .about-toc__link {
    display: flex;
    justify-content: flex-start;
    width: 100%;
    padding: 0.55rem 0.1rem;
    border: 0;
    border-bottom: 1px dashed var(--line);
    border-radius: 0;
    background-color: transparent;
    font-size: 0.9rem;
    color: var(--c-fog);
  }

  .page-about .about-toc__link:hover,
  .page-about .about-toc__link:focus-visible {
    background-color: transparent;
    color: var(--c-mineral);
    border-bottom-color: var(--c-gold);
  }

  .page-about .about-network__media {
    aspect-ratio: 16 / 9;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-honor,
  .page-about .about-honor__note,
  .page-about .about-toc__link {
    transition: none;
  }

  .page-about .about-honor:hover,
  .page-about .about-honor:focus-visible {
    transform: none;
  }
}
<<<END>>>