.page-about {
  --about-rail-w: 208px;
  --about-cut: 16px;
  --about-edge: clamp(14px, 3vw, 26px);
  --about-rhythm: clamp(38px, 5.4vw, 76px);
}

.page-about .breadcrumbs {
  margin: 22px 0 6px;
}

/* ---------- 首屏档案台 ---------- */
.page-about .about-masthead {
  position: relative;
  padding: clamp(26px, 4vw, 54px) 0 clamp(34px, 5vw, 70px);
  background:
    radial-gradient(680px 300px at 92% 6%, rgba(58, 199, 255, 0.13), transparent 68%),
    radial-gradient(520px 280px at 4% 96%, rgba(255, 122, 51, 0.11), transparent 70%);
}

.page-about .about-masthead-inner {
  display: grid;
  gap: clamp(26px, 4.4vw, 58px);
}

.page-about .about-kicker {
  margin: 0 0 14px;
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--copper-bright);
  text-transform: uppercase;
}

.page-about h1 {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 5vw, 54px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--paper);
  max-width: 16em;
}

.page-about .about-lead {
  margin: 0;
  max-width: 40em;
  font-family: var(--font-body);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: rgba(243, 239, 228, 0.82);
}

.page-about .about-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 数字碑 ---------- */
.page-about .masthead-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--line-soft);
  border: 1px solid var(--line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%);
}

.page-about .mstat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  background: var(--panel);
}

.page-about .mstat dt {
  margin: 0;
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-about .mstat dd {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 4px;
  font-family: var(--font-num);
  color: var(--paper);
}

.page-about .mnum {
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.page-about .munit {
  font-size: 12px;
  color: var(--muted);
}

.page-about .mstat--orange .mnum { color: var(--orange); }
.page-about .mstat--blue .mnum { color: var(--blue); }

/* ---------- 布局 ---------- */
.page-about .about-layout {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  padding-bottom: clamp(50px, 7vw, 96px);
}

.page-about .about-rail {
  position: relative;
}

.page-about .about-rail .rail-eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-body);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--copper-bright);
  text-transform: uppercase;
}

.page-about .about-rail .chapter-nav {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-rail .chapter-nav li {
  flex: 0 0 auto;
}

.page-about .about-rail .chapter-nav a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  color: var(--paper);
  text-decoration: none;
  font-family: var(--font-body);
  font-size: 13px;
  white-space: nowrap;
  background: rgba(18, 51, 44, 0.6);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
  transition: color 200ms ease, border-color 200ms ease, background-color 200ms ease;
}

.page-about .about-rail .chapter-nav a:hover,
.page-about .about-rail .chapter-nav a:focus-visible {
  border-color: var(--copper-bright);
  color: var(--copper-bright);
}

.page-about .about-rail .chapter-nav a.is-active {
  background: var(--orange);
  border-color: var(--orange);
  color: var(--ink);
}

.page-about .chapter-nav-num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  color: var(--copper);
}

.page-about .about-rail .chapter-nav a.is-active .chapter-nav-num {
  color: var(--ink);
}

/* ---------- 章节 ---------- */
.page-about .arc {
  position: relative;
  padding-top: clamp(20px, 2.6vw, 30px);
}

.page-about .arc-head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 22px;
}

.page-about .arc-num {
  flex: 0 0 auto;
  font-family: var(--font-num);
  font-size: clamp(34px, 4.6vw, 58px);
  font-weight: 700;
  line-height: 0.9;
  color: transparent;
  -webkit-text-stroke: 1px var(--copper);
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
}

.page-about .arc-head h2 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(21px, 2.6vw, 32px);
  line-height: 1.24;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-about .arc-sum {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 46em;
}

.page-about .arc-text p,
.page-about .vendor-copy p,
.page-about .network-copy p {
  margin: 0 0 16px;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.85;
  color: rgba(243, 239, 228, 0.84);
  max-width: 66ch;
}

.page-about .arc-text p:last-child,
.page-about .vendor-copy p:last-child,
.page-about .network-copy p:last-child {
  margin-bottom: 0;
}

.page-about .arc-text a,
.page-about .arc-foot a,
.page-about .network-copy a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px dashed rgba(58, 199, 255, 0.5);
}

.page-about .arc-text a:hover,
.page-about .arc-foot a:hover,
.page-about .network-copy a:hover {
  color: var(--copper-bright);
  border-bottom-color: var(--copper-bright);
}

.page-about .arc-foot {
  margin: 24px 0 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-body);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* 抓取数字块 */
.page-about .arc-pull {
  margin-top: 26px;
  padding: 20px 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 18px;
  background: linear-gradient(90deg, rgba(255, 122, 51, 0.14), rgba(18, 51, 44, 0));
  border-left: 3px solid var(--orange);
}

.page-about .pull-num {
  font-family: var(--font-num);
  font-size: clamp(30px, 4vw, 46px);
  font-weight: 700;
  line-height: 1;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.page-about .pull-num em {
  font-style: normal;
  font-size: 0.5em;
  margin-left: 2px;
}

.page-about .pull-cap {
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* 图 */
.page-about .arc-figure {
  margin: 0 0 26px;
  border: 1px solid var(--line);
  background: var(--panel);
  overflow: hidden;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%);
}

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

/* ---------- 时间轴 ---------- */
.page-about .epoch-list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 22px;
  position: relative;
}

.page-about .epoch-list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--copper), rgba(184, 130, 63, 0.15));
}

.page-about .epoch {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 4px 14px;
  padding: 0 0 26px;
}

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

.page-about .epoch-rule {
  position: absolute;
  left: -22px;
  top: 6px;
  width: 11px;
  height: 11px;
  background: var(--ink);
  border: 1px solid var(--copper);
  transform: rotate(45deg);
}

.page-about .epoch:first-child .epoch-rule {
  background: var(--orange);
  border-color: var(--orange);
}

.page-about .epoch-body {
  grid-column: 1;
}

.page-about .epoch-when {
  margin: 0 0 4px;
  font-family: var(--font-num);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--copper-bright);
  font-variant-numeric: tabular-nums;
}

.page-about .epoch-body h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .epoch-body p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.8;
  color: rgba(243, 239, 228, 0.78);
  max-width: 60ch;
}

.page-about .epoch-mark {
  grid-column: 2;
  align-self: start;
  padding: 3px 9px;
  border: 1px solid var(--line);
  font-family: var(--font-num);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* ---------- 厂商分层 ---------- */
.page-about .vendor-split {
  display: grid;
  gap: 26px;
}

.page-about .arc-figure--side {
  margin-bottom: 0;
}

.page-about .vendor-layers {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-about .layer {
  display: grid;
  grid-template-columns: 14px minmax(0, 1fr);
  gap: 4px 12px;
  padding: 14px 16px;
  background: var(--panel);
}

.page-about .layer-dot {
  grid-row: 1 / span 2;
  align-self: center;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--muted);
}

.page-about .layer--wide .layer-dot { background: var(--cyan); }
.page-about .layer--mid .layer-dot { background: var(--blue); }
.page-about .layer--core .layer-dot {
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 122, 51, 0.18);
}

.page-about .layer-name {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .layer-note {
  grid-column: 2;
  font-family: var(--font-body);
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 团队四格 ---------- */
.page-about .crew-grid {
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-about .crew {
  padding: 20px 18px 22px;
  background: var(--panel);
  border-top: 3px solid transparent;
}

.page-about .crew--rules { border-top-color: var(--orange); }
.page-about .crew--data { border-top-color: var(--blue); }
.page-about .crew--content { border-top-color: var(--cyan); }
.page-about .crew--service { border-top-color: var(--copper); }

.page-about .crew-count {
  margin: 0 0 10px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.page-about .crew-num {
  font-family: var(--font-num);
  font-size: 32px;
  font-weight: 700;
  line-height: 1;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}

.page-about .crew-unit {
  font-family: var(--font-body);
  font-size: 12px;
  color: var(--muted);
}

.page-about .crew h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--copper-bright);
}

.page-about .crew p:not(.crew-count) {
  margin: 0;
  font-family: var(--font-body);
  font-size: 13.5px;
  line-height: 1.78;
  color: rgba(243, 239, 228, 0.78);
}

/* ---------- 记录流程 ---------- */
.page-about .flow {
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-about .flow-step {
  position: relative;
  padding: 22px 20px 22px 62px;
  background: var(--panel);
}

.page-about .flow-idx {
  position: absolute;
  left: 18px;
  top: 22px;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  font-family: var(--font-num);
  font-size: 12px;
  font-weight: 700;
  color: var(--ink);
  background: var(--copper-bright);
  clip-path: polygon(0 0, calc(100% - 7px) 0, 100% 7px, 100% 100%, 0 100%);
}

.page-about .flow-step h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .flow-step p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.82;
  color: rgba(243, 239, 228, 0.79);
  max-width: 62ch;
}

.page-about .record-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .record-cell {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 14px;
  background: var(--near-black);
}

.page-about .rc-num {
  font-family: var(--font-num);
  font-size: 24px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .rc-num em {
  font-style: normal;
  font-size: 0.52em;
  margin-left: 2px;
}

.page-about .rc-cap {
  font-family: var(--font-body);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---------- 生态 ---------- */
.page-about .network-split {
  display: grid;
  gap: 26px;
}

.page-about .network-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-about .net-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  background: var(--panel);
}

.page-about .net-stat--hl {
  background: linear-gradient(150deg, rgba(43, 224, 176, 0.16), var(--panel));
}

.page-about .net-num {
  font-family: var(--font-num);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  color: var(--paper);
  font-variant-numeric: tabular-nums;
}

.page-about .net-num em {
  font-style: normal;
  font-size: 0.5em;
  margin-left: 2px;
  color: var(--copper-bright);
}

.page-about .net-cap {
  font-family: var(--font-body);
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .closing-plate {
  margin-top: 30px;
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid var(--line);
  background:
    radial-gradient(420px 200px at 88% 12%, rgba(58, 199, 255, 0.14), transparent 70%),
    var(--panel);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-about .closing-lead {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(17px, 2.1vw, 22px);
  font-weight: 700;
  line-height: 1.6;
  letter-spacing: -0.01em;
  color: var(--paper);
  max-width: 34em;
}

.page-about .closing-plate .about-cta-row {
  margin-top: 22px;
}

/* ---------- 桌面 ---------- */
@media (min-width: 760px) {
  .page-about .masthead-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

@media (min-width: 960px) {
  .page-about .about-masthead-inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
  }

  .page-about .about-layout {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-rail {
    position: sticky;
    top: calc(var(--footer-bar-h) + 84px);
  }

  .page-about .about-rail .chapter-nav {
    flex-direction: column;
    overflow: visible;
    gap: 6px;
  }

  .page-about .about-rail .chapter-nav a {
    width: 100%;
  }

  .page-about .vendor-split {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
    gap: 30px;
  }

  .page-about .network-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
    gap: 30px;
  }

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

  .page-about .crew:nth-child(2) {
    transform: translateY(14px);
  }

  .page-about .crew:nth-child(4) {
    transform: translateY(14px);
  }
}

@media (min-width: 1180px) {
  .page-about {
    --about-rail-w: 232px;
  }

  .page-about .flow-step {
    padding: 26px 24px 26px 68px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail .chapter-nav a,
  .page-about .crew {
    transition: none;
    transform: none;
  }
}
</｜｜DSML｜｜ parameter>
</｜｜DSML｜｜ invoke>
</｜｜DSML｜｜ calls>