.page-about {
  --about-ink-line: rgba(138, 151, 166, .22);
  --about-panel: rgba(19, 43, 68, .55);
  --about-body-text: rgba(244, 241, 232, .86);
  --about-body-muted: rgba(138, 151, 166, .92);
  --about-idx-w: 240px;
}

.page-about .shell {
  padding-top: 0;
  padding-bottom: 0;
}

.page-about .breadcrumbs {
  padding: 22px 0 0;
  font-size: 13px;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  padding: 28px 0 44px;
  border-bottom: 1px solid var(--about-ink-line);
  position: relative;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--clay) 45%, transparent 82%);
  border-radius: 2px;
  opacity: .7;
}

.page-about .about-hero h1 {
  font-size: clamp(28px, 5.2vw, 52px);
  line-height: 1.16;
  font-weight: 800;
  letter-spacing: -0.012em;
  color: var(--cream);
  margin: 14px 0 18px;
  max-width: 20em;
}

.page-about .about-hero .eyebrow {
  margin: 0;
}

.page-about .about-hero__lede {
  font-size: 16.5px;
  line-height: 1.82;
  color: var(--about-body-text);
  max-width: 42em;
  margin: 0 0 4px;
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 28px 0 0;
  padding: 0;
}

.page-about .about-hero__stat {
  background: var(--about-panel);
  border: 1px solid var(--about-ink-line);
  border-radius: var(--r-md);
  padding: 14px 16px 16px;
  min-width: 0;
}

.page-about .about-hero__stat dt {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--stone);
  margin: 0 0 8px;
}

.page-about .about-hero__stat dd {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 6px;
}

.page-about .about-hero__stat b {
  font-family: var(--font-display);
  font-size: 34px;
  font-weight: 800;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: 0.01em;
}

.page-about .about-hero__stat span {
  font-size: 12.5px;
  color: var(--stone);
}

/* ---------- 主布局：左索引 + 右正文 ---------- */

.page-about .about-map {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding: 34px 0 72px;
}

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

.page-about .about-index__title {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--stone);
  margin: 0 0 12px;
  padding: 0 0 10px;
  border-bottom: 1px solid var(--about-ink-line);
}

.page-about .about-index ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-index ol::-webkit-scrollbar {
  display: none;
}

.page-about .about-index a {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
  padding: 9px 12px;
  border-radius: var(--r-sm);
  border-left: 2px solid transparent;
  color: var(--stone);
  text-decoration: none;
  font-size: 13.5px;
  transition: color .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}

.page-about .about-index a b {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--clay);
  letter-spacing: 0.06em;
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(47, 230, 208, .08);
}

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

/* ---------- 章节块 ---------- */

.page-about .about-section {
  position: relative;
  padding: 0 0 46px;
  margin: 0 0 46px;
  border-bottom: 1px solid var(--about-ink-line);
}

.page-about .about-section:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-section__num {
  font-family: var(--font-display);
  font-size: 60px;
  font-weight: 800;
  line-height: .9;
  letter-spacing: 0.015em;
  color: rgba(193, 116, 63, .9);
  margin: 6px 0 10px;
  display: block;
}

@supports (-webkit-text-stroke: 1px red) {
  .page-about .about-section__num {
    color: transparent;
    -webkit-text-stroke: 1.4px var(--clay);
  }
}

.page-about .about-section h2 {
  font-size: clamp(21px, 2.6vw, 30px);
  font-weight: 800;
  line-height: 1.32;
  letter-spacing: -0.006em;
  color: var(--cream);
  margin: 0 0 6px;
}

.page-about .about-section h2::after {
  content: "";
  display: block;
  width: 44px;
  height: 3px;
  border-radius: 2px;
  background: var(--cyan);
  margin-top: 14px;
}

.page-about .about-section p {
  font-size: 16.5px;
  line-height: 1.82;
  color: var(--about-body-text);
  max-width: 42em;
  margin: 16px 0;
}

.page-about .about-section p.lead {
  font-size: 18px;
  line-height: 1.72;
  color: var(--cream);
  font-weight: 600;
  margin-top: 18px;
}

.page-about .about-section a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 230, 208, .35);
  padding-bottom: 1px;
  transition: border-color .18s var(--ease), color .18s var(--ease);
}

.page-about .about-section a:hover,
.page-about .about-section a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 数据来源卡 ---------- */

.page-about .about-sources {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin: 24px 0 8px;
}

.page-about .source-card {
  position: relative;
  background: var(--about-panel);
  border: 1px solid var(--about-ink-line);
  border-radius: var(--r-lg);
  padding: 18px 18px 20px 22px;
  overflow: hidden;
}

.page-about .source-card::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: var(--moss);
}

.page-about .source-card:nth-child(2)::before {
  background: var(--clay);
}

.page-about .source-card:nth-child(3)::before {
  background: var(--cyan);
}

.page-about .source-card b {
  display: block;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--cream);
  margin-bottom: 8px;
}

.page-about .source-card p {
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--about-body-muted);
  margin: 0;
  max-width: none;
}

/* ---------- 校验流程 ---------- */

.page-about .verify-wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  margin: 26px 0 8px;
  align-items: start;
}

.page-about .verify-visual {
  display: flex;
  justify-content: center;
  padding: 8px 0;
}

.page-about .verify-ring {
  width: 100%;
  max-width: 280px;
  height: auto;
  display: block;
}

.page-about .verify-ring__track {
  fill: none;
  stroke: rgba(138, 151, 166, .22);
  stroke-width: 1.4;
}

.page-about .verify-ring__arc {
  fill: none;
  stroke-width: 2.8;
  stroke-linecap: round;
}

.page-about .verify-ring__arc--a { stroke: var(--cyan); }
.page-about .verify-ring__arc--b { stroke: var(--clay); }
.page-about .verify-ring__arc--c { stroke: var(--moss); }
.page-about .verify-ring__arc--d { stroke: var(--orange); }

.page-about .verify-ring__node {
  stroke: var(--ink);
  stroke-width: 2;
}

.page-about .verify-ring__node--a { fill: var(--cyan); }
.page-about .verify-ring__node--b { fill: var(--clay); }
.page-about .verify-ring__node--c { fill: var(--moss); }
.page-about .verify-ring__node--d { fill: var(--orange); }

.page-about .verify-ring__label {
  font-family: var(--font-display);
  font-size: 26px;
  font-weight: 800;
  fill: var(--cream);
}

.page-about .verify-ring__sub {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 2px;
  fill: var(--stone);
}

.page-about .verify-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}

.page-about .verify-item {
  background: var(--about-panel);
  border: 1px solid var(--about-ink-line);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: border-color .22s var(--ease);
}

.page-about .verify-item[open] {
  border-color: rgba(47, 230, 208, .42);
}

.page-about .verify-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--cream);
}

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

.page-about .verify-item summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--cyan);
  flex: 0 0 auto;
}

.page-about .verify-item[open] summary::after {
  content: "\2013";
  color: var(--orange);
}

.page-about .verify-num {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  color: var(--clay);
  letter-spacing: 0.06em;
  background: rgba(193, 116, 63, .14);
  border: 1px solid rgba(193, 116, 63, .4);
  border-radius: var(--pill);
  padding: 3px 9px;
  flex: 0 0 auto;
}

.page-about .verify-item p {
  margin: 0;
  padding: 0 16px 16px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--about-body-muted);
  max-width: none;
}

.page-about .verify-shot {
  margin-top: 24px;
}

/* ---------- 团队岗位 ---------- */

.page-about .team-bar {
  display: flex;
  height: 34px;
  border-radius: var(--pill);
  overflow: hidden;
  border: 1px solid var(--about-ink-line);
  background: var(--panel-deep);
  margin: 26px 0 18px;
}

.page-about .team-bar__seg {
  display: block;
  height: 100%;
  transition: filter .2s var(--ease);
}

.page-about .team-bar__seg--verify {
  flex: 1;
  background: var(--cyan);
}

.page-about .team-bar__seg--product {
  flex: 1.5;
  background: var(--moss);
}

.page-about .team-bar__seg--ops {
  flex: 1.1;
  background: var(--clay);
}

.page-about .team-bar__seg--support {
  flex: 0.85;
  background: var(--stone);
}

.page-about .team-legend {
  list-style: none;
  margin: 0 0 4px;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .team-legend li {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr);
  grid-template-rows: auto auto;
  column-gap: 12px;
  row-gap: 4px;
  background: var(--about-panel);
  border: 1px solid var(--about-ink-line);
  border-radius: var(--r-md);
  padding: 14px 16px;
}

.page-about .team-legend__swatch {
  grid-row: 1 / span 2;
  align-self: start;
  width: 12px;
  height: 12px;
  margin-top: 4px;
  border-radius: 3px;
  display: block;
}

.page-about .team-legend__swatch--verify { background: var(--cyan); }
.page-about .team-legend__swatch--product { background: var(--moss); }
.page-about .team-legend__swatch--ops { background: var(--clay); }
.page-about .team-legend__swatch--support { background: var(--stone); }

.page-about .team-legend b {
  font-size: 15px;
  font-weight: 700;
  color: var(--cream);
  line-height: 1.5;
}

.page-about .team-legend span {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--about-body-muted);
}

/* ---------- 发展历程时间轴 ---------- */

.page-about .tl-scroll {
  margin: 22px 0 0;
  position: relative;
}

.page-about .tl-list {
  list-style: none;
  margin: 0;
  padding: 6px 4px 22px;
  display: flex;
  gap: 14px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  position: relative;
}

.page-about .tl-list::-webkit-scrollbar {
  height: 6px;
}

.page-about .tl-list::-webkit-scrollbar-track {
  background: rgba(138, 151, 166, .12);
  border-radius: var(--pill);
}

.page-about .tl-list::-webkit-scrollbar-thumb {
  background: rgba(138, 151, 166, .55);
  border-radius: var(--pill);
}

.page-about .tl-item {
  flex: 0 0 252px;
  scroll-snap-align: start;
  position: relative;
  background: var(--about-panel);
  border: 1px solid var(--about-ink-line);
  border-top: 3px solid var(--clay);
  border-radius: 0 0 var(--r-lg) var(--r-lg);
  padding: 18px 18px 20px;
  transition: border-color .22s var(--ease), transform .22s var(--ease);
}

.page-about .tl-item:nth-child(2) { border-top-color: var(--moss); }
.page-about .tl-item:nth-child(3) { border-top-color: var(--clay); }
.page-about .tl-item:nth-child(4) { border-top-color: var(--orange); }
.page-about .tl-item:nth-child(5) { border-top-color: var(--cyan); }
.page-about .tl-item:nth-child(6) { border-top-color: var(--yellow); }

.page-about .tl-item:hover {
  border-left-color: rgba(47, 230, 208, .45);
  border-right-color: rgba(47, 230, 208, .45);
}

.page-about .tl-year {
  display: block;
  font-family: var(--font-display);
  font-size: 34px;
  font-weight: 800;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: 0.01em;
}

.page-about .tl-milestone {
  display: inline-block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--stone);
  border: 1px solid var(--about-ink-line);
  border-radius: var(--pill);
  padding: 3px 9px;
}

.page-about .tl-title {
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--cream);
  margin: 14px 0 8px;
}

.page-about .tl-body {
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--about-body-muted);
  margin: 0;
  max-width: none;
}

/* ---------- 合作与认可 ---------- */

.page-about .partner-shot {
  margin-top: 22px;
}

.page-about .partner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin: 24px 0 22px;
}

.page-about .partner-cell {
  background: var(--about-panel);
  border: 1px solid var(--about-ink-line);
  border-radius: var(--r-lg);
  padding: 18px 18px 20px;
  border-left: 3px solid var(--moss);
}

.page-about .partner-cell:nth-child(2) { border-left-color: var(--clay); }
.page-about .partner-cell:nth-child(3) { border-left-color: var(--cyan); }
.page-about .partner-cell:nth-child(4) { border-left-color: var(--orange); }

.page-about .partner-cell b {
  display: block;
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 800;
  line-height: 1.05;
  color: var(--cream);
  letter-spacing: 0.01em;
  margin-bottom: 6px;
}

.page-about .partner-cell span {
  display: block;
  font-size: 13px;
  line-height: 1.6;
  color: var(--stone);
}

.page-about .about-cta-line {
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--about-body-text);
}

/* ---------- 图片容器统一 ---------- */

.page-about .media {
  max-width: 100%;
}

.page-about .media img {
  border-radius: inherit;
}

/* ---------- 响应式 ---------- */

@media (min-width: 620px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
  }

  .page-about .about-sources {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

  .page-about .team-legend {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

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

@media (min-width: 800px) {
  .page-about .verify-wrap {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 30px;
    align-items: start;
  }

  .page-about .verify-visual {
    padding-top: 4px;
    justify-content: flex-start;
  }

  .page-about .verify-ring {
    max-width: 240px;
  }
}

@media (min-width: 960px) {
  .page-about .about-map {
    grid-template-columns: var(--about-idx-w) minmax(0, 1fr);
    gap: 52px;
    padding: 44px 0 84px;
  }

  .page-about .about-index {
    position: sticky;
    top: calc(var(--nav-h) + 24px);
    align-self: start;
  }

  .page-about .about-index ol {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
  }

  .page-about .about-index a {
    display: flex;
    width: 100%;
    padding: 10px 12px;
    font-size: 14px;
  }

  .page-about .about-section__num {
    font-size: 78px;
  }

  .page-about .about-section {
    padding-bottom: 56px;
    margin-bottom: 56px;
  }

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

  .page-about .about-section p {
    font-size: 17px;
  }
}

@media (min-width: 1180px) {
  .page-about .about-hero {
    padding: 36px 0 52px;
  }

  .page-about .about-hero__stats {
    gap: 16px;
    margin-top: 34px;
  }

  .page-about .about-hero__stat {
    padding: 18px 20px;
  }

  .page-about .about-hero__stat b {
    font-size: 38px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index a,
  .page-about .verify-item,
  .page-about .tl-item,
  .page-about .team-bar__seg {
    transition: none;
  }
}
<<<END>>>