.page-about {
  --about-rail: 236px;
  --about-paper-line: rgba(34, 32, 30, .14);
  background: var(--bg);
  color: var(--text);
  overflow-x: clip;
}

.page-about a {
  color: inherit;
}

.page-about .about-crumb {
  padding: var(--sp-4) 0 var(--sp-3);
  border-bottom: 1px solid rgba(42, 91, 88, .5);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero-wrap {
  background:
    radial-gradient(90% 70% at 88% -10%, rgba(179, 58, 30, .30), transparent 62%),
    radial-gradient(60% 55% at 0% 100%, rgba(75, 232, 176, .07), transparent 62%),
    var(--ink-900);
  border-bottom: 1px solid var(--line);
}

.page-about .about-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-5);
  padding: var(--sp-5) 0 var(--sp-7);
}

.page-about .about-hero-text {
  min-width: 0;
}

.page-about .about-h1 {
  margin: var(--sp-4) 0 0;
  max-width: 16em;
  text-wrap: balance;
  color: var(--text-strong);
}

.page-about .about-lede {
  margin: var(--sp-5) 0 0;
  max-width: 34em;
  color: var(--text);
}

.page-about .about-eyebrow {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin: var(--sp-6) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero-fig {
  margin: 0;
  align-self: stretch;
}

.page-about .about-hero-fig img {
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 起点 ---------- */
.page-about .about-origin {
  background: var(--paper);
  color: var(--charcoal);
  padding: var(--sp-7) 0;
}

.page-about .about-two-col {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-5);
}

.page-about .about-origin .label {
  color: rgba(34, 32, 30, .62);
}

.page-about .about-h2 {
  margin: var(--sp-3) 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.4vw, 36px);
  letter-spacing: -.015em;
  line-height: 1.24;
  color: inherit;
}

.page-about .about-prose p {
  margin: 0 0 var(--sp-4);
  max-width: 37em;
  color: #3A3733;
}

.page-about .about-prose p:last-child {
  margin-bottom: 0;
}

.page-about .about-prose strong {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 1.05em;
  color: var(--charcoal);
}

/* ---------- 评测 ---------- */
.page-about .about-score {
  padding: var(--sp-7) 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-head {
  max-width: 48em;
}

.page-about .about-intro {
  margin: var(--sp-4) 0 0;
  max-width: 36em;
  color: var(--text-dim);
}

.page-about .about-radar {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-6);
  margin-top: var(--sp-6);
}

.page-about .about-radar-frame {
  min-width: 0;
}

.page-about .about-radar-svg {
  display: block;
  width: 100%;
  max-width: 320px;
  height: auto;
  margin: 0 auto;
}

.page-about .about-radar-note {
  margin: var(--sp-4) 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .about-dims {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .about-dim {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0 var(--sp-4);
  align-items: baseline;
  padding: var(--sp-4);
  background: var(--surface);
  cursor: default;
  transition: background .2s var(--ease);
}

.page-about .about-dim:hover,
.page-about .about-dim:focus-within {
  background: var(--ink-700, #174745);
  outline: none;
}

.page-about .about-dim-name {
  font-weight: 600;
  color: var(--text-strong);
}

.page-about .about-dim-score {
  font-size: 24px;
  line-height: 1;
  color: var(--neon);
}

.page-about .about-dim-note {
  grid-column: 1 / -1;
  margin: var(--sp-2) 0 0;
  font-size: 14px;
  line-height: 1.68;
  color: var(--text-dim);
  display: none;
}

.page-about .about-quote {
  margin: var(--sp-6) 0 0;
  padding: var(--sp-5);
  border-left: 3px solid var(--ochre);
  background: var(--paper);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.page-about .about-quote p {
  margin: 0;
  max-width: 40em;
  color: var(--charcoal);
}

.page-about .about-flow {
  margin-top: var(--sp-5);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  overflow: hidden;
}

.page-about .about-flow > summary {
  padding: var(--sp-4) var(--sp-5);
  font-weight: 600;
  color: var(--text-strong);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

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

.page-about .about-flow > summary::before {
  content: "";
  width: 8px;
  height: 8px;
  flex: none;
  border-radius: 50%;
  border: 1.5px solid var(--neon);
  background: transparent;
  transition: background .2s var(--ease);
}

.page-about .about-flow[open] > summary::before {
  background: var(--neon);
}

.page-about .about-flow-steps {
  margin: 0;
  padding: 0 var(--sp-5) var(--sp-5);
  list-style: none;
  display: grid;
  gap: var(--sp-4);
}

.page-about .about-flow-steps li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--sp-4);
  padding-top: var(--sp-4);
  border-top: 1px solid var(--line);
}

.page-about .about-flow-steps .num {
  font-size: 18px;
  color: var(--ochre-lit);
}

.page-about .about-flow-steps h3 {
  margin: 0 0 var(--sp-1);
  font-size: 16px;
  font-weight: 700;
  color: var(--text-strong);
}

.page-about .about-flow-steps p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ---------- 版本演进 ---------- */
.page-about .about-versions {
  padding: var(--sp-7) 0;
  background: var(--ink-800);
}

.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-5);
  margin-top: var(--sp-6);
}

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

.page-about .about-rail .label {
  margin: 0 0 var(--sp-3);
  color: var(--text-dim);
}

.page-about .about-rail-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rail-list a {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  font-size: 13px;
  text-decoration: none;
  color: var(--text-dim);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .about-rail-list a:hover,
.page-about .about-rail-list a:focus-visible {
  color: var(--neon);
  border-color: var(--neon);
  outline: none;
}

.page-about .about-rail-list .num {
  font-size: 12px;
  color: var(--ochre-lit);
}

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

.page-about .about-track-bg {
  margin: 0 0 var(--sp-5);
  aspect-ratio: 3 / 2;
  opacity: .9;
}

.page-about .about-track-bg img {
  max-width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-node {
  border-top: 1px solid var(--line);
  padding: var(--sp-4) 0;
}

.page-about .about-node:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-node details > summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--sp-3);
  cursor: pointer;
  list-style: none;
}

.page-about .about-node summary::-webkit-details-marker {
  display: none;
}

.page-about .about-node-code {
  position: relative;
  padding-left: 16px;
  font-size: 13px;
  color: var(--ochre-lit);
}

.page-about .about-node-code::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 8px;
  height: 8px;
  margin-top: -4px;
  border-radius: 50%;
  background: var(--ochre);
}

.page-about .about-node details[open] .about-node-code::before {
  background: var(--neon);
  box-shadow: 0 0 0 3px rgba(75, 232, 176, .18);
}

.page-about .about-node-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2.2vw, 21px);
  letter-spacing: -.01em;
  color: var(--text-strong);
}

.page-about .about-node details p {
  margin: var(--sp-3) 0 0;
  max-width: 36em;
  color: var(--text-dim);
}

/* ---------- 团队与服务规模 ---------- */
.page-about .about-team {
  padding: var(--sp-7) 0;
  background: var(--paper);
  color: var(--charcoal);
}

.page-about .about-team .label {
  color: rgba(34, 32, 30, .62);
}

.page-about .about-team .about-intro {
  color: rgba(34, 32, 30, .74);
}

.page-about .about-desk {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: var(--sp-6);
  background: var(--about-paper-line);
  border: 1px solid var(--about-paper-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-about .about-desk-cell {
  padding: var(--sp-5);
  background: var(--paper);
  min-width: 0;
}

.page-about .about-desk-total {
  background: var(--ink-900);
  color: var(--text-strong);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: var(--sp-2);
}

.page-about .about-big {
  font-size: clamp(34px, 5.4vw, 46px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--neon);
}

.page-about .about-desk-total .about-big {
  color: var(--neon);
}

.page-about .about-cell-cap {
  font-size: 13px;
  letter-spacing: .04em;
  color: rgba(244, 238, 230, .74);
}

.page-about .about-desk-cell h3 {
  margin: 0 0 var(--sp-2);
  font-size: 16px;
  font-weight: 700;
  color: var(--charcoal);
}

.page-about .about-desk-cell p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(34, 32, 30, .74);
}

.page-about .about-reach {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-5);
  margin-top: var(--sp-6);
  padding-top: var(--sp-5);
  border-top: 1px solid var(--about-paper-line);
}

.page-about .about-reach-item {
  min-width: 0;
}

.page-about .about-reach-item .about-big {
  color: var(--ochre);
}

.page-about .about-reach-item p {
  margin: var(--sp-2) 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(34, 32, 30, .76);
}

.page-about .about-reach-note {
  border-left: 3px solid var(--ochre);
  padding-left: var(--sp-4);
}

.page-about .about-reach-note p {
  margin: 0;
}

/* ---------- 合作 ---------- */
.page-about .about-partners {
  padding: var(--sp-7) 0 0;
  background: var(--bg);
}

.page-about .about-partner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: var(--sp-6);
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-about .about-partner {
  padding: var(--sp-5);
  background: var(--ink-800);
  min-width: 0;
}

.page-about .about-partner-num {
  display: block;
  font-size: clamp(28px, 4.2vw, 38px);
  line-height: 1;
  color: var(--ochre-lit);
}

.page-about .about-partner h3 {
  margin: var(--sp-3) 0 var(--sp-2);
  font-size: 16px;
  font-weight: 700;
  color: var(--text-strong);
}

.page-about .about-partner p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .about-band {
  margin: var(--sp-7) 0 0;
  border-radius: 0;
  border-left: 0;
  border-right: 0;
}

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

/* ---------- 收尾 ---------- */
.page-about .about-next {
  padding: var(--sp-7) 0 var(--sp-8);
  background: var(--surface);
  border-top: 1px solid var(--line);
}

.page-about .about-next-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--sp-5);
  align-items: start;
}

.page-about .about-next-text p {
  margin: var(--sp-4) 0 0;
  max-width: 34em;
  color: var(--text-dim);
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
}

/* ---------- 断点 ---------- */
@media (min-width: 700px) {
  .page-about .about-desk {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-reach {
    grid-template-columns: repeat(2, minmax(0, 1fr)) minmax(0, 1.3fr);
    align-items: start;
  }
  .page-about .about-partner-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, .72fr);
    align-items: end;
    gap: var(--sp-6);
    padding: var(--sp-6) 0 var(--sp-8);
  }
  .page-about .about-two-col {
    grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
    gap: var(--sp-6);
  }
  .page-about .about-radar {
    grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
    align-items: center;
    gap: var(--sp-7);
  }
  .page-about .about-radar-svg {
    margin: 0;
  }
  .page-about .about-dim-note {
    display: none;
  }
  .page-about .about-dim:hover .about-dim-note,
  .page-about .about-dim:focus-within .about-dim-note,
  .page-about .about-dim:focus .about-dim-note {
    display: block;
  }
  .page-about .about-next-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: var(--sp-6);
  }
  .page-about .about-actions {
    justify-content: flex-end;
  }
}

@media (max-width: 819px) {
  .page-about .about-dim-note {
    display: block;
  }
}

@media (min-width: 960px) {
  .page-about .about-split {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: var(--sp-6);
    align-items: start;
  }
  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + var(--sp-4));
  }
  .page-about .about-rail-list {
    flex-direction: column;
    flex-wrap: nowrap;
  }
  .page-about .about-rail-list a {
    width: 100%;
    justify-content: flex-start;
    border-radius: var(--radius-md);
    padding: 10px 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-dim,
  .page-about .about-rail-list a,
  .page-about .about-flow > summary::before {
    transition: none;
  }
}
<<<END>>>

.page-about {
  --ink-700: transparent;
}