.page-about {
  --about-pad: clamp(16px, 4vw, 30px);
  --about-figure-gap: clamp(12px, 2.4vw, 20px);
}

.page-about p {
  max-width: 68ch;
}

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

.page-about .breadcrumb {
  padding-top: 18px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(24px, 5vw, 48px);
  padding-bottom: clamp(34px, 6vw, 64px);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -18%;
  bottom: -46%;
  width: 78%;
  height: 92%;
  background: radial-gradient(circle at 50% 50%, rgba(61, 245, 208, 0.16), rgba(61, 245, 208, 0) 68%);
  pointer-events: none;
}

.page-about .about-hero .display-1 {
  position: relative;
  z-index: 1;
  max-width: 19ch;
  margin: 10px 0 0;
  line-height: 1.06;
}

.page-about .about-lede {
  position: relative;
  z-index: 1;
  margin-top: 18px;
  color: var(--muted);
}

.page-about .about-hero-stats {
  position: relative;
  z-index: 1;
  list-style: none;
  margin: clamp(24px, 4.5vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-hero-stats > .stat {
  background: var(--ink-900);
  padding: 18px 16px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-hero-stats .stat-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(30px, 7vw, 46px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan);
}

.page-about .about-hero-stats .stat-label {
  font-size: 13px;
  color: var(--muted);
  letter-spacing: 0.02em;
}

/* ---------- 起点与定位 ---------- */
.page-about .about-origin-grid {
  row-gap: clamp(22px, 4vw, 0px);
}

.page-about .about-origin h2 {
  margin: 8px 0 16px;
}

.page-about .about-origin p + p {
  margin-top: 14px;
}

.page-about .about-origin-card {
  padding: 22px 20px;
  background: var(--ink-900);
  border: 1px solid var(--line);
}

.page-about .about-card-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber);
  margin: 0 0 14px;
}

.page-about .about-who {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .about-who li {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--off-white);
  border-bottom: 1px solid var(--line);
  padding-bottom: 10px;
}

.page-about .about-who li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .about-who li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 6px;
  height: 6px;
  background: var(--cyan);
  transform: rotate(45deg);
}

.page-about .about-card-link {
  display: inline-block;
  margin-top: 18px;
  font-size: 14px;
}

/* ---------- 发展历程 ---------- */
.page-about .about-history h2 {
  margin: 8px 0 12px;
  max-width: 22ch;
}

.page-about .about-history-note {
  margin-bottom: 22px;
}

.page-about .about-history-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-900);
}

.page-about .about-history-figure img {
  aspect-ratio: 14 / 9;
}

.page-about .about-history .figure-caption {
  margin-top: var(--about-figure-gap);
}

.page-about .about-year-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 24px 0 28px;
}

.page-about .about-year-nav a {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--line);
  padding: 6px 11px;
  transition: color var(--ease), border-color var(--ease), background-color var(--ease);
}

.page-about .about-year-nav a:hover,
.page-about .about-year-nav a:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan-dim);
  background: var(--ink-900);
}

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

.page-about .about-track::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--line) 16%, var(--line) 84%, rgba(46, 74, 63, 0) 100%);
}

.page-about .about-step {
  position: relative;
  padding: 0 0 22px 26px;
  scroll-margin-top: 96px;
}

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

.page-about .about-step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 9px;
  height: 9px;
  border: 1px solid var(--cyan-dim);
  background: var(--ink-950);
  transform: rotate(45deg);
  transition: background-color var(--ease), border-color var(--ease);
}

.page-about .about-step:hover::before,
.page-about .about-step:focus-within::before {
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .about-step-year {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  letter-spacing: 0.12em;
  color: var(--cyan);
  margin-bottom: 8px;
}

.page-about .about-step-body {
  border: 1px solid var(--line);
  background: var(--ink-950);
  padding: 16px 18px;
  transition: border-color var(--ease), background-color var(--ease);
}

.page-about .about-step-body:hover,
.page-about .about-step-body:focus-within,
.page-about .about-step-body:focus {
  border-color: var(--cyan-dim);
  background: var(--ink-900);
}

.page-about .about-step-body:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.page-about .about-step-body h3 {
  margin: 0 0 8px;
  font-size: 17px;
  line-height: 1.35;
  color: var(--off-white);
}

.page-about .about-step-body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .about-team h2 {
  margin: 8px 0 14px;
  max-width: 20ch;
}

.page-about .about-team-bar {
  display: flex;
  height: 14px;
  margin: 26px 0 20px;
  border: 1px solid var(--line);
  background: var(--ink-950);
}

.page-about .about-seg {
  display: block;
  height: 100%;
}

.page-about .about-seg--edit { flex: 16; background: var(--cyan); }
.page-about .about-seg--product { flex: 12; background: var(--cyan-dim); }
.page-about .about-seg--content { flex: 6; background: var(--amber); }
.page-about .about-seg--service { flex: 4; background: var(--amber-deep); }

.page-about .about-legend {
  list-style: none;
  margin: 0 0 clamp(30px, 5vw, 46px);
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px 18px;
}

.page-about .about-legend li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--muted);
}

.page-about .about-dot {
  width: 8px;
  height: 8px;
  flex: 0 0 auto;
}

.page-about .about-dot--edit { background: var(--cyan); }
.page-about .about-dot--product { background: var(--cyan-dim); }
.page-about .about-dot--content { background: var(--amber); }
.page-about .about-dot--service { background: var(--amber-deep); }

.page-about .about-legend-name {
  color: var(--off-white);
}

.page-about .about-legend-num {
  margin-left: auto;
  color: var(--cyan);
  font-size: 13px;
}

.page-about .about-flow-grid {
  row-gap: clamp(24px, 4vw, 32px);
}

.page-about .about-flow-title {
  margin: 0 0 16px;
  font-size: clamp(19px, 2.6vw, 24px);
  line-height: 1.35;
  color: var(--off-white);
}

.page-about .about-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-flow > li {
  background: var(--ink-900);
  padding: 18px 18px 20px;
}

.page-about .about-flow-num {
  display: block;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--amber);
  margin-bottom: 8px;
}

.page-about .about-flow h4 {
  margin: 0 0 8px;
  font-size: 16px;
  color: var(--off-white);
  letter-spacing: 0.02em;
}

.page-about .about-flow p {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .about-team-figure {
  margin: 0;
}

.page-about .about-team-figure .figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-900);
}

.page-about .about-team-figure img {
  aspect-ratio: 3 / 2;
}

.page-about .about-team-figure .figure-caption {
  margin-top: var(--about-figure-gap);
}

/* ---------- 合作生态 ---------- */
.page-about .about-network-grid {
  row-gap: clamp(24px, 4vw, 0px);
}

.page-about .about-network h2 {
  margin: 8px 0 14px;
  max-width: 18ch;
}

.page-about .about-facts {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-facts li {
  background: var(--ink-900);
  padding: 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-facts .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(17px, 3.4vw, 22px);
  color: var(--cyan);
  letter-spacing: -0.01em;
  line-height: 1.1;
}

.page-about .about-facts li > span:last-child {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.4;
}

.page-about .about-honor {
  margin-top: 18px;
  padding-left: 14px;
  border-left: 2px solid var(--amber);
  font-size: 14px;
  line-height: 1.6;
  color: var(--off-white);
}

.page-about .about-network-visual {
  margin: 0;
}

.page-about .about-network-visual .figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-900);
}

.page-about .about-network-visual img {
  aspect-ratio: 3 / 2;
}

.page-about .about-network-visual .figure-caption {
  margin-top: var(--about-figure-gap);
}

/* ---------- 服务原则 ---------- */
.page-about .about-service h2 {
  margin: 8px 0 22px;
  max-width: 22ch;
}

.page-about .about-rules {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-rules > li {
  background: var(--ink-950);
  padding: 20px 18px 22px;
  transition: background-color var(--ease);
}

.page-about .about-rules > li:hover {
  background: var(--ink-900);
}

.page-about .about-rules-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  border: 1px solid var(--line);
  padding: 3px 8px;
  margin-bottom: 12px;
}

.page-about .about-rules h3 {
  margin: 0 0 8px;
  font-size: 17px;
  line-height: 1.35;
  color: var(--off-white);
}

.page-about .about-rules p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.62;
  color: var(--muted);
}

.page-about .about-more {
  margin-top: 22px;
  font-size: 15px;
  color: var(--muted);
}

/* ---------- 行动区 ---------- */
.page-about .about-cta-panel {
  display: flex;
  flex-direction: column;
  gap: 22px;
  padding: clamp(22px, 4vw, 38px);
  background: var(--ink-900);
  border: 1px solid var(--line);
}

.page-about .about-cta-panel h2 {
  margin: 0 0 10px;
  max-width: 20ch;
}

.page-about .about-cta-panel p {
  margin: 0;
  color: var(--muted);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-about .about-hero-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 780px) {
  .page-about .about-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .about-cta-panel {
    flex-direction: row;
    align-items: flex-end;
    justify-content: space-between;
    gap: 30px;
  }

  .page-about .about-cta-actions {
    flex: 0 0 auto;
  }
}

@media (min-width: 900px) {
  .page-about .about-origin-aside {
    padding-left: clamp(20px, 3vw, 40px);
  }

  .page-about .about-track::before {
    left: 128px;
  }

  .page-about .about-step {
    display: grid;
    grid-template-columns: 108px minmax(0, 1fr);
    column-gap: 40px;
    padding: 0 0 26px 0;
  }

  .page-about .about-step::before {
    left: 122px;
    top: 17px;
  }

  .page-about .about-step-year {
    margin: 0;
    padding-top: 6px;
    text-align: right;
    font-size: 21px;
    letter-spacing: 0.08em;
  }

  .page-about .about-step-body {
    padding: 18px 22px 20px;
  }

  .page-about .about-step-body h3 {
    font-size: 18px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero .display-1 {
    font-size: clamp(52px, 6.2vw, 84px);
  }

  .page-about .about-network-visual {
    padding-left: clamp(16px, 2.5vw, 34px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-step-body,
  .page-about .about-step::before,
  .page-about .about-year-nav a,
  .page-about .about-rules > li {
    transition: none;
  }
}
<<<END>>>