.page-about {
  --about-gap: clamp(24px, 4vw, 56px);
  --about-panel: var(--ink-800);
  background: var(--ink-950);
  color: var(--text-main);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-sans);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.22;
  margin: 0 0 12px;
}

.page-about h1 { font-size: clamp(30px, 4.4vw, 52px); }
.page-about h2 { font-size: clamp(22px, 2.6vw, 34px); }
.page-about h3 { font-size: 17px; font-weight: 700; margin-bottom: 6px; }

.page-about .section-label { margin-bottom: 10px; }

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(24px, 4vw, 56px) clamp(32px, 5vw, 72px);
}

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

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 22px;
}

.page-about .breadcrumb a {
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 120ms var(--ease), border-color 120ms var(--ease);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--cyan-glow);
  border-bottom-color: var(--cyan-glow);
}

.page-about .about-crumb-sep { color: var(--line-blue); }

.page-about .about-hero-copy h1 { max-width: 22ch; }

.page-about .about-hero-lede {
  max-width: 62ch;
  margin: 0 0 26px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .about-anchor-bar {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
}

.page-about .about-anchor {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 16px;
  border: 2px solid var(--line-blue);
  background: var(--ink-900);
  color: var(--text-main);
  font-size: 14px;
  text-decoration: none;
  transition: border-color 120ms var(--ease), color 120ms var(--ease), transform 120ms var(--ease);
}

.page-about .about-anchor:hover,
.page-about .about-anchor:focus-visible {
  border-color: var(--cyan-glow);
  color: var(--cyan-glow);
  transform: translateY(-2px);
}

.page-about .about-hero-side {
  background: var(--ink-900);
  border: 2px solid var(--line-blue);
  box-shadow: var(--shadow-hard);
  padding: clamp(20px, 3vw, 28px);
}

.page-about .about-side-label {
  margin: 0 0 18px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--line-blue);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan-glow);
}

.page-about .about-side-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .about-side-stats li {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line-blue);
}

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

.page-about .about-side-num {
  display: block;
  width: fit-content;
  margin-bottom: 8px;
  padding-bottom: 4px;
  border-bottom: 2px solid var(--cyan-glow);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--text-main);
}

.page-about .about-side-unit {
  margin-left: 4px;
  font-size: 0.48em;
  color: var(--text-dim);
}

.page-about .about-side-name {
  display: block;
  margin-bottom: 4px;
  font-size: 14px;
  font-weight: 700;
}

.page-about .about-side-desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .about-side-foot {
  margin: 20px 0 0;
  padding-top: 14px;
  border-top: 2px solid var(--line-blue);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ---------- 定位 ---------- */
.page-about .about-position-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-position-lede {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
  max-width: 46ch;
}

.page-about .about-position-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-blue);
  border: 2px solid var(--line-blue);
}

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

.page-about .about-position-list h3 {
  font-size: 15px;
  color: var(--cyan-glow);
  margin-bottom: 6px;
}

.page-about .about-position-list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
}

/* ---------- 团队分工 ---------- */
.page-about .about-team-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-team-intro {
  margin: 0 0 24px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
  max-width: 54ch;
}

.page-about .about-team-figure {
  margin: 0 0 26px;
  border: 2px solid var(--line-blue);
  background: var(--ink-900);
  box-shadow: var(--shadow-hard);
}

.page-about .about-team-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-blue);
  border: 2px solid var(--line-blue);
}

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

.page-about .about-role-title {
  font-size: 16px;
  margin-bottom: 6px;
}

.page-about .about-role-title .mono { color: var(--signal-orange); }

.page-about .about-role p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .about-team-side {
  background: var(--about-panel);
  border: 2px solid var(--line-blue);
  box-shadow: var(--shadow-orange);
  padding: clamp(20px, 3vw, 26px);
}

.page-about .about-team-total {
  margin: 0 0 20px;
  font-size: 34px;
  font-weight: 800;
  color: var(--text-main);
}

.page-about .about-bars {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-bar {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px 12px;
  align-items: center;
}

.page-about .about-bar-name {
  font-size: 14px;
  color: var(--text-main);
}

.page-about .about-bar-num {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-main);
}

.page-about .about-bar-fill {
  grid-column: 1 / -1;
  position: relative;
  height: 12px;
  background: var(--ink-950);
  border: 1px solid var(--line-blue);
}

.page-about .about-bar-fill::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: var(--bar-w, 40%);
  background: var(--bar-color, var(--cyan-glow));
}

.page-about .about-bar--ops { --bar-w: 39.1%; --bar-color: var(--signal-orange); }
.page-about .about-bar--dev { --bar-w: 41.3%; --bar-color: var(--cyan-glow); }
.page-about .about-bar--cs  { --bar-w: 19.6%; --bar-color: var(--status-green); }

.page-about .about-team-note {
  margin: 20px 0 0;
  padding-top: 14px;
  border-top: 2px solid var(--line-blue);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ---------- 发展节点 ---------- */
.page-about .about-history-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-history-head p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
  max-width: 48ch;
}

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

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan-glow), rgba(46, 242, 206, 0.06));
}

.page-about .about-node {
  position: relative;
  padding: 0 0 var(--node-gap, 34px) 36px;
}

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

.page-about .about-node--long { --node-gap: 64px; }

.page-about .about-node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 16px;
  height: 16px;
  border: 2px solid var(--cyan-glow);
  background: var(--ink-950);
}

.page-about .about-node-year {
  display: inline-block;
  margin: 0 0 8px;
  padding-left: 10px;
  border-left: 3px solid var(--signal-orange);
  font-size: 15px;
  letter-spacing: 0.1em;
  color: var(--cyan-glow);
}

.page-about .about-node h3 { font-size: 17px; }

.page-about .about-node p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
  max-width: 46ch;
}

.page-about .about-line-figure {
  margin: 0;
  border: 2px solid var(--line-blue);
  background: var(--ink-900);
}

.page-about .about-line-figure img {
  display: block;
  width: 100%;
  height: auto;
}

/* ---------- 覆盖与规模 ---------- */
.page-about .about-reach-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-blue);
  border: 2px solid var(--line-blue);
}

.page-about .about-reach-item {
  background: var(--ink-900);
  padding: 22px 20px;
  display: grid;
  gap: 6px;
  align-content: start;
}

.page-about .about-reach-figure {
  margin: 0 0 4px;
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-size: clamp(26px, 3.4vw, 36px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--text-main);
}

.page-about .about-reach-figure .mono {
  padding-bottom: 3px;
  border-bottom: 2px solid var(--cyan-glow);
}

.page-about .about-reach-unit {
  font-size: 14px;
  font-weight: 400;
  color: var(--text-dim);
}

.page-about .about-reach-title {
  font-size: 15px;
  margin: 0;
}

.page-about .about-reach-desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ---------- 资质 ---------- */
.page-about .about-trust-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-trust-media {
  margin: 0;
  border: 2px solid var(--line-blue);
  background: var(--ink-900);
  box-shadow: var(--shadow-hard);
}

.page-about .about-trust-media img {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .about-badges {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .about-badge {
  border: 2px solid var(--line-blue);
  background: var(--ink-900);
  padding: 20px;
  display: grid;
  gap: 8px;
  align-content: start;
  transition: border-color 140ms var(--ease), box-shadow 140ms var(--ease), transform 140ms var(--ease);
}

.page-about .about-badge:hover,
.page-about .about-badge:focus-within {
  border-color: var(--signal-orange);
  box-shadow: var(--shadow-orange);
  transform: translate(-3px, -3px);
}

.page-about .about-badge-mark {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--signal-orange);
  word-break: break-word;
}

.page-about .about-badge-name {
  font-size: 16px;
  margin: 0;
}

.page-about .about-badge-note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ---------- 合作 ---------- */
.page-about .about-partner-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-partner-copy p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
  max-width: 46ch;
}

.page-about .about-partner-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-partner-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-blue);
  border: 2px solid var(--line-blue);
}

.page-about .about-partner-list li {
  background: var(--ink-900);
  padding: 16px 18px;
  display: grid;
  gap: 5px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-dim);
}

.page-about .about-partner-key {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan-glow);
}

.page-about .about-tail {
  grid-column: 1 / -1;
  margin: 28px 0 0;
  padding-top: 18px;
  border-top: 2px solid var(--line-blue);
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .about-reach-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 7fr) minmax(300px, 4fr);
    align-items: start;
  }

  .page-about .about-position-inner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-about .about-trust-inner {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  }

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

  .page-about .about-partner-inner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
}

@media (min-width: 1000px) {
  .page-about .about-team-inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }

  .page-about .about-team-side {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-about .about-history-inner {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  }

  .page-about .about-history-head { grid-column: 1 / -1; }

  .page-about .about-timeline {
    grid-column: 1;
    grid-row: 2;
  }

  .page-about .about-line-figure {
    grid-column: 2;
    grid-row: 2;
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-anchor,
  .page-about .about-badge,
  .page-about .breadcrumb a {
    transition-duration: 0.01ms;
    transform: none;
  }
}