.page-about {
  --about-pad: clamp(16px, 4vw, 40px);
  --about-cut: 18px;
  --about-gap: clamp(24px, 4vw, 56px);
  background: var(--ink);
  color: var(--white);
  font-family: var(--font-body);
}

.page-about .crumbs {
  padding: 16px var(--about-pad) 0;
  max-width: 1400px;
  margin-inline: auto;
}

.page-about .about-head {
  max-width: 62ch;
  margin-bottom: clamp(24px, 4vw, 44px);
}

.page-about .h2 {
  margin: 10px 0 14px;
  line-height: 1.18;
}

.page-about .lede {
  color: var(--muted);
  line-height: 1.75;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 5vw, 64px) 0 0;
  background:
    radial-gradient(120% 85% at 88% -12%, rgba(57, 245, 208, .16), transparent 62%),
    radial-gradient(90% 70% at 0% 0%, rgba(242, 184, 75, .09), transparent 55%);
}

.page-about .about-hero-inner {
  display: grid;
  gap: var(--about-gap);
  align-items: end;
  padding-inline: var(--about-pad);
}

.page-about .about-hero-copy .eyebrow {
  color: var(--amber);
  margin: 0 0 14px;
}

.page-about h1.display {
  margin: 0 0 18px;
  line-height: 1.02;
  letter-spacing: -0.02em;
}

.page-about h1.display em {
  font-style: normal;
  color: var(--cyan);
}

.page-about .about-hero-copy .lede {
  font-size: clamp(15px, 2.2vw, 17px);
  max-width: 46ch;
  margin: 0 0 24px;
  color: rgba(244, 248, 245, .82);
}

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

.page-about .hero-slate {
  padding: clamp(18px, 3vw, 26px);
  color: var(--ink);
  background: var(--paper);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%);
  box-shadow: 0 24px 60px rgba(0, 0, 0, .35);
}

.page-about .slate-title {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: .14em;
  color: rgba(7, 28, 22, .62);
  border-bottom: 1px dashed rgba(7, 28, 22, .25);
  padding-bottom: 10px;
}

.page-about .slate-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 12px;
}

.page-about .slate-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .slate-num {
  font-size: clamp(20px, 4vw, 26px);
  font-weight: 700;
  color: var(--ink);
  line-height: 1;
}

.page-about .slate-label {
  font-size: 12px;
  line-height: 1.4;
  color: rgba(7, 28, 22, .7);
}

.page-about .about-hero-figure {
  position: relative;
  margin: clamp(26px, 5vw, 48px) 0 0;
}

.page-about .about-hero-figure img {
  display: block;
  width: 100%;
  height: clamp(190px, 40vw, 460px);
  object-fit: cover;
}

.page-about .about-hero-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(7, 28, 22, .15) 0%, rgba(7, 28, 22, .82) 100%);
}

.page-about .about-hero-caption {
  position: relative;
  z-index: 1;
  margin-top: -34px;
  padding: 0 var(--about-pad) 0;
  font-size: 12px;
  color: var(--muted);
}

/* ---------- 目录条 ---------- */
.page-about .about-toc {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--ink-2);
}

.page-about .about-toc-inner {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px var(--about-pad);
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-toc-inner::-webkit-scrollbar {
  display: none;
}

.page-about .about-toc-label {
  flex: 0 0 auto;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--cyan);
}

.page-about .about-toc-list {
  display: flex;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-toc-list a {
  display: block;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  color: rgba(244, 248, 245, .78);
  text-decoration: none;
  white-space: nowrap;
  transition: color .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}

.page-about .about-toc-list a:hover,
.page-about .about-toc-list a:focus-visible {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  background: linear-gradient(180deg, rgba(14, 42, 34, .92), rgba(7, 28, 22, 1));
  border-bottom: 1px solid var(--line-soft);
  padding-inline: var(--about-pad);
}

.page-about .about-timeline-grid {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
}

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

.page-about .tl-item {
  position: relative;
  padding: 0 0 14px 52px;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 8px;
  bottom: -8px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(57, 245, 208, .06));
}

.page-about .tl-item:last-child::before {
  bottom: auto;
  height: 44px;
}

.page-about .tl-marker {
  position: absolute;
  left: 0;
  top: 2px;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  background: var(--ink);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% 70%, 70% 100%, 0 100%);
  z-index: 1;
}

.page-about .tl-num {
  font-size: 12px;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .tl-fold {
  border: 1px solid var(--line-soft);
  background: rgba(11, 36, 29, .7);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
  transition: border-color .2s var(--ease), background .2s var(--ease);
}

.page-about .tl-fold:hover {
  border-color: var(--line);
}

.page-about .tl-h {
  margin: 0;
}

.page-about .tl-btn {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px 14px;
  width: 100%;
  padding: 16px 18px;
  background: none;
  border: 0;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

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

.page-about .tl-year {
  font-size: 13px;
  font-weight: 700;
  color: var(--amber);
  letter-spacing: .04em;
}

.page-about .tl-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(16px, 2.4vw, 19px);
  line-height: 1.4;
  color: var(--white);
}

.page-about .tl-btn[aria-expanded="true"] .tl-title {
  color: var(--cyan);
}

.page-about .tl-arrow {
  width: 9px;
  height: 9px;
  margin-left: auto;
  align-self: center;
  border-right: 2px solid var(--cyan);
  border-bottom: 2px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform .22s var(--ease);
}

.page-about .tl-btn[aria-expanded="true"] .tl-arrow {
  transform: rotate(-135deg);
}

.page-about .tl-panel {
  padding: 0 18px 18px;
  border-top: 1px dashed var(--line-soft);
  margin-top: 2px;
}

.page-about .tl-panel p {
  margin: 14px 0 12px;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(244, 248, 245, .78);
}

.page-about .tl-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .tl-facts li {
  font-size: 12px;
  line-height: 1.5;
  padding: 5px 10px;
  color: var(--cyan);
  border: 1px solid var(--line);
  background: rgba(57, 245, 208, .06);
}

.page-about .timeline-aside {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about .timeline-figure {
  margin: 0;
  border: 1px solid var(--line-soft);
  background: var(--ink-3);
}

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

.page-about .timeline-figure .media-caption {
  padding: 10px 12px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .timeline-note {
  padding: 16px 18px;
  background: var(--ink-2);
  border-left: 2px solid var(--amber);
}

.page-about .timeline-note-year {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--amber);
}

.page-about .timeline-note-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(244, 248, 245, .78);
}

.page-about .timeline-note-text a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 服务对象 ---------- */
.page-about .about-audience {
  padding-inline: var(--about-pad);
}

.page-about .about-aud-grid {
  display: grid;
  gap: clamp(24px, 4vw, 52px);
  align-items: start;
}

.page-about .aud-list {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .aud-item {
  padding: 18px 0 18px 20px;
  border-top: 1px solid var(--line-soft);
  position: relative;
}

.page-about .aud-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 26px;
  width: 6px;
  height: 6px;
  background: var(--cyan);
  transform: rotate(45deg);
}

.page-about .aud-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(16px, 2.3vw, 18px);
  font-weight: 700;
  color: var(--white);
  line-height: 1.4;
}

.page-about .aud-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(244, 248, 245, .74);
}

.page-about .aud-figure {
  margin: 0;
  border: 1px solid var(--line-soft);
  background: var(--ink-2);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
  overflow: hidden;
}

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

.page-about .aud-figure .media-caption {
  padding: 12px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 内容生产 ---------- */
.page-about .about-process {
  background: linear-gradient(180deg, rgba(7, 28, 22, 1), rgba(14, 42, 34, .95));
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  padding-inline: var(--about-pad);
}

.page-about .proc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .proc-item {
  position: relative;
  padding: 20px 20px 22px;
  background: rgba(7, 28, 22, .7);
  border: 1px solid var(--line-soft);
  border-top-width: 3px;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
  transition: transform .2s var(--ease), border-color .2s var(--ease);
}

.page-about .proc-item:hover {
  transform: translateY(-3px);
  border-color: var(--line);
}

.page-about .proc-a { border-top-color: var(--cyan); }
.page-about .proc-b { border-top-color: var(--amber); }
.page-about .proc-c { border-top-color: var(--rust); }
.page-about .proc-d { border-top-color: var(--muted); }

.page-about .proc-num {
  display: block;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--muted);
  margin-bottom: 10px;
}

.page-about .proc-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--white);
}

.page-about .proc-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(244, 248, 245, .72);
}

.page-about .proc-note {
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 16px 18px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(244, 248, 245, .76);
  border-left: 2px solid var(--amber);
  background: rgba(242, 184, 75, .06);
}

.page-about .proc-note a {
  color: var(--amber);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 回访对照 ---------- */
.page-about .about-compare {
  padding-inline: var(--about-pad);
}

.page-about .about-cmp-grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-about .cmp-copy p {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 248, 245, .78);
  margin: 0 0 14px;
}

.page-about .cmp-copy .btn {
  margin-top: 8px;
}

.page-about .cmp-board {
  padding: clamp(18px, 3vw, 28px);
  background:
    linear-gradient(rgba(57, 245, 208, .05) 1px, transparent 1px) 0 0 / 100% 28px,
    linear-gradient(90deg, rgba(57, 245, 208, .05) 1px, transparent 1px) 0 0 / 28px 100%,
    var(--ink-2);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

.page-about .cmp-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  padding-bottom: 18px;
  border-bottom: 1px dashed var(--line);
}

.page-about .cmp-stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-about .cmp-num {
  font-size: clamp(34px, 8vw, 52px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .cmp-unit {
  font-size: 12.5px;
  color: var(--muted);
}

.page-about .cmp-board-label {
  margin: 18px 0 12px;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--amber);
}

.page-about .cmp-chips {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .cmp-chips li {
  font-size: 12.5px;
  line-height: 1.4;
  padding: 6px 11px;
  color: rgba(244, 248, 245, .82);
  border: 1px solid var(--line-soft);
  background: rgba(7, 28, 22, .7);
}

/* ---------- 合作共建 ---------- */
.page-about .about-partners {
  background: linear-gradient(180deg, rgba(14, 42, 34, .9), rgba(7, 28, 22, 1));
  padding-inline: var(--about-pad);
}

.page-about .partner-grid {
  gap: 14px;
}

.page-about .partner-card {
  padding: 22px 20px 24px;
  background: var(--ink-3);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
  transition: border-color .2s var(--ease), background .2s var(--ease);
}

.page-about .partner-card:hover {
  border-color: var(--line);
  background: rgba(14, 42, 34, .95);
}

.page-about .partner-title {
  margin: 14px 0 10px;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.4vw, 19px);
  font-weight: 700;
  color: var(--white);
  line-height: 1.4;
}

.page-about .partner-title .mono {
  color: var(--amber);
  margin-right: 4px;
}

.page-about .partner-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(244, 248, 245, .72);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  padding-inline: var(--about-pad);
}

.page-about .about-next-inner {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
  align-items: center;
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid var(--line);
  background:
    radial-gradient(90% 130% at 100% 0%, rgba(57, 245, 208, .14), transparent 60%),
    radial-gradient(80% 120% at 0% 100%, rgba(242, 184, 75, .1), transparent 60%),
    var(--ink-2);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%);
}

.page-about .about-next-copy .eyebrow {
  color: var(--cyan);
  margin: 0 0 10px;
}

.page-about .about-next-copy .h2 {
  margin: 0 0 10px;
}

.page-about .about-next-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(244, 248, 245, .76);
  max-width: 52ch;
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .proc-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-next-inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .8fr);
    justify-items: end;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
  }

  .page-about .about-timeline-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, .85fr);
    align-items: start;
  }

  .page-about .timeline-aside {
    position: sticky;
    top: 96px;
  }

  .page-about .about-aud-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  }

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

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

  .page-about .tl-item {
    padding-left: 64px;
  }

  .page-about .tl-marker {
    width: 42px;
    height: 42px;
  }

  .page-about .tl-item::before {
    left: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .proc-item,
  .page-about .partner-card,
  .page-about .tl-arrow,
  .page-about .about-toc-list a {
    transition: none;
  }

  .page-about .proc-item:hover {
    transform: none;
  }
}
<<<END>>>