.page-about {
  --about-sec-gap: clamp(28px, 4.5vw, 56px);
  background: var(--ink-900);
  color: var(--fog);
}

/* ---------- 封面首屏 ---------- */
.page-about .about-cover {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 80% 8%, rgba(53, 242, 208, .10), transparent 62%),
    radial-gradient(90% 80% at 8% 92%, rgba(77, 163, 255, .10), transparent 64%),
    var(--ink-900);
}

.page-about .about-cover-img {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .24;
}

.page-about .about-cover-veil {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(180deg, rgba(6, 18, 31, .58) 0%, rgba(6, 18, 31, .88) 58%, var(--ink-900) 100%);
}

.page-about .about-cover-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 5vw, 56px);
  padding-block: clamp(18px, 3vw, 30px) clamp(40px, 7vw, 82px);
}

.page-about .about-cover-main {
  min-width: 0;
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about .about-h1 {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .about-h1-word {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(76px, 21vw, 172px);
  line-height: .82;
  letter-spacing: -.06em;
  color: var(--fog);
  text-shadow: 0 0 64px rgba(53, 242, 208, .22);
}

.page-about .about-h1-sub {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(17px, 2.4vw, 26px);
  line-height: 1.4;
  letter-spacing: -.01em;
  color: var(--silver);
}

.page-about .about-lead {
  margin: 0;
  max-width: 58ch;
  color: var(--silver);
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 6px;
}

/* 看台读数 */
.page-about .about-readout {
  min-width: 0;
  align-self: end;
  padding: clamp(16px, 2.4vw, 24px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(8, 42, 50, .66);
  box-shadow: var(--shadow);
}

.page-about .about-readout-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-scale {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-about .about-scale li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 14px;
  padding-block: 10px;
  border-top: 1px solid var(--line);
}

.page-about .about-scale li:first-child {
  border-top: 0;
}

.page-about .about-scale-num {
  font-size: clamp(22px, 3.2vw, 30px);
  font-weight: 700;
  line-height: 1;
  color: var(--fog);
  letter-spacing: -.02em;
}

.page-about .about-scale-label {
  font-size: 13px;
  line-height: 1.5;
  color: var(--steel);
}

/* ---------- 主体分栏 ---------- */
.page-about .about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 48px);
  padding-block: clamp(34px, 5vw, 62px) clamp(48px, 7vw, 96px);
}

/* 章节索引 */
.page-about .about-spy {
  min-width: 0;
}

.page-about .about-spy-title {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .3em;
  color: var(--steel);
}

.page-about .about-spy-list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
}

.page-about .about-spy-list li {
  flex: 0 0 auto;
}

.page-about .about-spy-list .spy-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--steel);
  font-size: 13px;
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-about .about-spy-list .spy-link .mono {
  font-size: 11px;
  opacity: .72;
}

.page-about .about-spy-list .spy-link:hover,
.page-about .about-spy-list .spy-link:focus-visible {
  color: var(--fog);
  border-color: var(--cyan);
  background: rgba(53, 242, 208, .08);
}

.page-about .about-spy-list .spy-link[aria-current="true"] {
  color: var(--ink-900);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .about-spy-list .spy-link[aria-current="true"] .mono {
  opacity: .8;
}

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

/* ---------- 区块骨架 ---------- */
.page-about .about-sec {
  padding-block: var(--about-sec-gap);
  border-top: 1px solid var(--line);
}

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

.page-about .about-sec-head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(18px, 3vw, 32px);
}

.page-about .about-sec-head .section-title {
  margin: 0;
}

.page-about .about-sec-head .lead {
  margin: 0;
  max-width: 62ch;
  color: var(--silver);
}

.page-about .about-sec h3 {
  font-family: var(--font-display);
}

/* ---------- 品牌自述 ---------- */
.page-about .about-brand-grid {
  gap: clamp(18px, 3vw, 34px);
}

.page-about .about-brand-text {
  min-width: 0;
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .about-brand-text p {
  margin: 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--silver);
  max-width: 60ch;
}

.page-about .about-claims {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  align-content: start;
}

.page-about .about-claims li {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  border-radius: var(--radius);
  background: rgba(8, 42, 50, .5);
}

.page-about .about-claims-idx {
  display: block;
  margin-bottom: 6px;
  font-size: 11px;
  letter-spacing: .24em;
  color: var(--cyan);
}

.page-about .about-claims p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--fog);
}

/* ---------- 能力地图 ---------- */
.page-about .about-map-figure {
  margin: 0 0 clamp(18px, 3vw, 30px);
}

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

.page-about .about-tree li {
  position: relative;
  padding: 14px 14px 18px 60px;
  border-radius: var(--radius);
  transition: background-color .2s var(--ease);
}

.page-about .about-tree li::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 36px;
  bottom: 0;
  width: 1px;
  background: var(--line);
}

.page-about .about-tree li::after {
  content: "";
  position: absolute;
  left: 36px;
  top: 18px;
  width: 24px;
  height: 1px;
  background: var(--line);
}

.page-about .about-tree li:last-child::before {
  display: none;
}

.page-about .about-tree li:hover,
.page-about .about-tree li:focus-visible {
  background: rgba(53, 242, 208, .06);
}

.page-about .about-tree li:focus {
  outline: none;
}

.page-about .about-node-idx {
  position: absolute;
  left: 0;
  top: 0;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-900);
  font-size: 13px;
  color: var(--steel);
  transition: color .2s var(--ease), border-color .2s var(--ease), box-shadow .2s var(--ease);
}

.page-about .about-tree li:hover .about-node-idx,
.page-about .about-tree li:focus-visible .about-node-idx {
  color: var(--cyan);
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(53, 242, 208, .12);
}

.page-about .about-tree h3 {
  margin: 0 0 6px;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--fog);
}

.page-about .about-node-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: .14em;
  color: var(--cyan);
  border: 1px solid rgba(53, 242, 208, .38);
  border-radius: 999px;
  padding: 1px 9px;
}

.page-about .about-tree p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--silver);
  max-width: 70ch;
}

/* ---------- 团队 ---------- */
.page-about .about-crew {
  list-style: none;
  margin: 0 0 clamp(18px, 3vw, 28px);
  padding: 0;
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
}

.page-about .about-crew li {
  padding: 16px;
  border: 1px solid var(--line);
  border-top: 2px solid var(--steel);
  border-radius: var(--radius);
  background: rgba(8, 42, 50, .5);
}

.page-about .about-crew-num {
  display: block;
  margin-bottom: 8px;
  font-size: clamp(26px, 4vw, 36px);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-crew h3 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  color: var(--fog);
}

.page-about .about-crew p {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--steel);
}

.page-about .about-ops {
  list-style: none;
  margin: 0;
  padding: clamp(16px, 2.4vw, 22px) clamp(16px, 2.4vw, 24px);
  display: grid;
  gap: 10px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  border-radius: var(--radius);
  background: rgba(33, 26, 69, .44);
}

.page-about .about-ops li {
  font-size: 15px;
  line-height: 1.72;
  color: var(--silver);
}

.page-about .about-ops .mono {
  display: inline-block;
  margin-right: 10px;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--orange);
}

/* ---------- 发展历程 ---------- */
.page-about .about-journey-figure {
  margin: 0 0 clamp(16px, 3vw, 26px);
}

.page-about .about-time {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-time li {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 15px 8px 15px 24px;
  border-left: 1px solid var(--line);
  transition: background-color .2s var(--ease);
}

.page-about .about-time li::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 23px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 122, 26, .16);
}

.page-about .about-time li:hover {
  background: rgba(255, 122, 26, .06);
}

.page-about .about-time-year {
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--orange);
}

.page-about .about-time-body h3 {
  margin: 0 0 5px;
  font-size: 17px;
  font-weight: 700;
  color: var(--fog);
}

.page-about .about-time-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--silver);
  max-width: 66ch;
}

/* ---------- 合作与荣誉 ---------- */
.page-about .about-partner-grid {
  gap: clamp(14px, 2.4vw, 22px);
}

.page-about .about-panel {
  min-width: 0;
  padding: clamp(18px, 3vw, 28px);
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .about-panel h3 {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  color: var(--fog);
}

.page-about .about-panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--silver);
}

.page-about .about-numlist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-numlist li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  font-size: 14px;
  line-height: 1.6;
  color: var(--silver);
}

.page-about .about-numlist .mono {
  font-size: 24px;
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
}

.page-about .about-honor-badge {
  justify-self: start;
  display: inline-block;
  padding: 8px 12px;
  border: 1px solid var(--amber);
  border-radius: var(--radius);
  font-size: 13px;
  letter-spacing: .05em;
  color: var(--amber);
}

.page-about .about-panel .muted {
  color: var(--steel);
}

/* ---------- 服务承诺 ---------- */
.page-about .about-service {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 3vw, 28px);
}

.page-about .about-service-list {
  min-width: 0;
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .about-service-list h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  color: var(--fog);
}

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

.page-about .about-checklist li {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 10px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--silver);
}

.page-about .about-checklist li::before {
  content: "▸";
  color: var(--cyan);
}

.page-about .about-service-list .muted {
  margin: 0;
  max-width: 60ch;
  color: var(--steel);
}

.page-about .about-contact-card {
  min-width: 0;
  padding: clamp(18px, 3vw, 26px);
  display: grid;
  gap: 8px;
  align-content: start;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(158deg, rgba(74, 20, 38, .62), rgba(6, 18, 31, .88));
  box-shadow: var(--shadow);
}

.page-about .about-contact-card .eyebrow {
  margin: 0 0 4px;
  color: var(--silver);
}

.page-about .about-contact-mail {
  font-size: clamp(14px, 2.1vw, 18px);
  line-height: 1.5;
  color: var(--cyan);
  overflow-wrap: anywhere;
}

.page-about .about-contact-tel {
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: .01em;
  color: var(--fog);
}

.page-about .about-contact-meta {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--steel);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-time li {
    grid-template-columns: 108px minmax(0, 1fr);
    gap: 20px;
    padding-left: 26px;
  }

  .page-about .about-time-year {
    padding-top: 2px;
  }
}

@media (min-width: 860px) {
  .page-about .about-service {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  }
}

@media (min-width: 960px) {
  .page-about .about-cover-inner {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, .58fr);
    align-items: end;
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .about-cover-inner > .crumbs {
    grid-column: 1 / -1;
  }

  .page-about .about-cover-main {
    grid-column: 1;
  }

  .page-about .about-readout {
    grid-column: 2;
  }
}

@media (min-width: 1000px) {
  .page-about .about-layout {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: clamp(30px, 4vw, 60px);
    align-items: start;
  }

  .page-about .about-spy {
    position: sticky;
    top: 88px;
    align-self: start;
  }

  .page-about .about-spy-list {
    flex-direction: column;
    overflow: visible;
  }
}

@media (max-width: 520px) {
  .page-about .about-tree li {
    padding-left: 52px;
  }

  .page-about .about-tree li::after {
    width: 18px;
  }

  .page-about .about-crew {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  }
}
<<<END>>>