.page-about {
  --about-gap: clamp(1.5rem, 3.5vw, 3rem);
  --about-radius: 2px;
}

.page-about .about-crumb-row {
  padding-top: 1rem;
  padding-bottom: 0.25rem;
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 0.4rem;
  color: var(--edge);
}

.page-about .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--mint);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(1.75rem, 5vw, 3.5rem) 0 clamp(2rem, 5vw, 4rem);
  background:
    linear-gradient(158deg, var(--green) 0%, var(--green) 38%, var(--ink) 78%);
  border-bottom: var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: auto -10% -30% auto;
  width: min(70vw, 620px);
  aspect-ratio: 1;
  background: linear-gradient(180deg, rgba(200, 255, 61, 0.14), rgba(79, 227, 193, 0));
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
  pointer-events: none;
}

.page-about .about-hero-grid {
  position: relative;
  display: grid;
  gap: clamp(1.5rem, 3vw, 2.5rem);
}

.page-about .about-title {
  margin: 0.5rem 0 1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2rem, 6.4vw, 3.8rem);
  line-height: 1.06;
  letter-spacing: -0.012em;
  color: var(--paper);
}

.page-about .about-title em {
  font-style: normal;
  color: var(--lime);
}

.page-about .about-hero .lede {
  max-width: 44ch;
  color: var(--paper);
  font-size: 1rem;
  line-height: 1.8;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.35rem 0 1rem;
}

.page-about .about-hero-note {
  margin: 0;
  padding-left: 0.65rem;
  border-left: 3px solid var(--amber);
  font-family: var(--font-data);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-about .about-hero-media {
  margin: 0;
  background: var(--board);
  border: var(--line);
  box-shadow: var(--hard);
}

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

.page-about .media-caption {
  padding: 0.55rem 0.8rem;
  font-family: var(--font-data);
  font-size: 0.7rem;
  letter-spacing: 0.03em;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px solid var(--edge);
}

/* ---------- 场景三段 ---------- */
.page-about .about-scene .section-head {
  max-width: 60ch;
}

.page-about .scene-wrap {
  display: grid;
  gap: 0.9rem;
  margin-top: 1.6rem;
}

.page-about .scene-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.9rem;
  padding: 1rem 1.1rem;
  background: var(--board);
  border: var(--line);
  border-left-width: 4px;
  border-left-color: var(--lime);
  box-shadow: var(--hard);
}

.page-about .scene-num {
  font-family: var(--font-data);
  font-size: 1.4rem;
  font-weight: 600;
  line-height: 1;
  color: var(--lime);
}

.page-about .scene-step h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.12rem;
  line-height: 1.2;
  color: var(--paper);
}

.page-about .scene-step p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-coverage .coverage-grid {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-coverage .section-title {
  color: var(--paper);
}

.page-about .cov-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: 1.4rem;
  background: var(--edge);
  border: var(--line);
}

.page-about .cov-figure {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding: 0.95rem 1rem;
  background: var(--green);
}

.page-about .cov-num {
  font-family: var(--font-data);
  font-size: clamp(1.6rem, 5vw, 2.3rem);
  font-weight: 600;
  line-height: 1;
  color: var(--lime);
  transition: color 0.35s var(--ease);
}

.page-about .cov-label {
  font-family: var(--font-data);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .cov-figure.reveal.is-pending {
  opacity: 0.4;
}

.page-about .cov-figure.reveal.is-visible {
  opacity: 1;
  transition: opacity 0.5s var(--ease);
}

.page-about .cov-figure.reveal.is-visible .cov-num {
  color: var(--mint);
}

.page-about .coverage-note {
  margin: 1.15rem 0 0;
  padding-left: 0.75rem;
  border-left: 3px solid var(--steel);
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--paper);
}

.page-about .coverage-media {
  margin: 0;
  border: var(--line);
  box-shadow: var(--hard);
  background: var(--board);
}

/* ---------- 编辑流程 ---------- */
.page-about .about-flow .section-head {
  max-width: 62ch;
}

.page-about .flow-grid {
  display: grid;
  gap: var(--about-gap);
  margin-top: 1.5rem;
  align-items: start;
}

.page-about .flow-details {
  display: grid;
  gap: 0.7rem;
}

.page-about .flow-item {
  background: var(--board);
  border: var(--line);
  box-shadow: var(--hard);
}

.page-about .flow-head {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.85rem 1rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--paper);
}

.page-about .flow-head::-webkit-details-marker {
  display: none;
}

.page-about .flow-head:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-about .flow-item[open] .flow-head {
  color: var(--lime);
  border-bottom: 1px solid var(--edge);
}

.page-about .flow-idx {
  font-family: var(--font-data);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--amber);
}

.page-about .flow-name {
  flex: 1 1 auto;
}

.page-about .flow-body {
  padding: 0.8rem 1rem 1rem;
  font-size: 0.93rem;
  line-height: 1.78;
  color: var(--muted);
}

.page-about .flow-body p {
  margin: 0;
}

.page-about .flow-media {
  margin: 0;
  border: var(--line);
  box-shadow: var(--hard);
  background: var(--board);
  align-self: stretch;
}

/* ---------- 检索路径 ---------- */
.page-about .about-path .path-grid {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .path-list {
  display: grid;
  gap: 0.6rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.page-about .path-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.8rem;
  align-items: baseline;
  padding: 0.75rem 0.9rem;
  background: var(--board);
  border-left: 3px solid var(--lime);
  font-size: 0.94rem;
  line-height: 1.7;
  color: var(--paper);
}

.page-about .path-list b {
  font-family: var(--font-data);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--lime);
}

.page-about .path-side {
  display: grid;
  gap: 0.8rem;
}

.page-about .path-card {
  padding: 1rem 1.1rem;
  background: var(--ink);
  border: var(--line);
  border-top: 4px solid var(--steel);
}

.page-about .path-card--lime {
  border-top-color: var(--lime);
}

.page-about .path-card-label {
  margin: 0 0 0.4rem;
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-about .path-card-num {
  margin: 0 0 0.4rem;
  font-family: var(--font-data);
  font-size: clamp(1.5rem, 4.5vw, 2rem);
  font-weight: 600;
  line-height: 1;
  color: var(--paper);
}

.page-about .path-card--lime .path-card-num {
  color: var(--lime);
}

.page-about .path-card-text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 发展节点 ---------- */
.page-about .about-timeline .section-head {
  max-width: 60ch;
}

.page-about .timeline {
  position: relative;
  margin: 1.8rem 0 0;
  padding: 0 0 0 1.6rem;
  list-style: none;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 0.42rem;
  top: 0.3rem;
  bottom: 0.3rem;
  width: 2px;
  background: linear-gradient(180deg, var(--lime) 0%, var(--amber) 48%, var(--steel) 100%);
}

.page-about .tl-item {
  position: relative;
  padding-bottom: 1.35rem;
}

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -1.47rem;
  top: 0.42rem;
  width: 0.6rem;
  height: 0.6rem;
  background: var(--ink);
  border: 2px solid var(--lime);
  transform: rotate(45deg);
}

.page-about .tl-year {
  margin: 0;
  font-family: var(--font-data);
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1;
  color: var(--amber);
}

.page-about .tl-title {
  margin: 0.3rem 0 0.35rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.1rem;
  line-height: 1.25;
  color: var(--paper);
}

.page-about .tl-text {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 服务对象 ---------- */
.page-about .about-audience .section-title {
  color: var(--paper);
}

.page-about .audience-grid {
  display: grid;
  gap: 0.9rem;
  margin-top: 1.6rem;
}

.page-about .audience-card {
  padding: 1.05rem 1.1rem 1.15rem;
  background: var(--board);
  border: var(--line);
  box-shadow: var(--hard);
}

.page-about .audience-card h3 {
  margin: 0.55rem 0 0.4rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.08rem;
  line-height: 1.2;
  color: var(--paper);
}

.page-about .audience-card p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-cta {
  display: grid;
  gap: 1.1rem;
  margin-top: 1.75rem;
  padding: clamp(1.2rem, 3vw, 1.9rem);
  background: linear-gradient(135deg, var(--green) 0%, var(--ink) 100%);
  border: var(--line);
  box-shadow: var(--hard);
}

.page-about .cta-title {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.35rem, 3.2vw, 1.8rem);
  line-height: 1.15;
  color: var(--paper);
}

.page-about .cta-text {
  margin: 0;
  max-width: 56ch;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .scene-wrap {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .scene-step {
    grid-template-columns: minmax(0, 1fr);
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
  }

  .page-about .about-coverage .coverage-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: center;
  }

  .page-about .flow-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: stretch;
  }

  .page-about .about-path .path-grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.75fr);
    align-items: start;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .page-about .about-cta-actions {
    justify-content: flex-end;
    max-width: 24rem;
  }

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

  .page-about .timeline::before {
    left: 50%;
    transform: translateX(-1px);
  }

  .page-about .tl-item {
    width: calc(50% - 1.7rem);
    padding-bottom: 1.7rem;
  }

  .page-about .tl-item::before {
    left: auto;
    right: -2.06rem;
  }

  .page-about .tl-item:nth-child(odd) {
    margin-right: auto;
    text-align: right;
  }

  .page-about .tl-item:nth-child(even) {
    margin-left: auto;
    padding-top: 1.2rem;
  }

  .page-about .tl-item:nth-child(even)::before {
    left: -2.06rem;
    right: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .cov-figure.reveal.is-pending,
  .page-about .cov-figure.reveal.is-visible {
    opacity: 1;
    transition: none;
  }

  .page-about .cov-num {
    transition: none;
  }
}
<<<END>>>