.page-about {
  --about-gap: clamp(26px, 5vw, 68px);
  --about-ring: clamp(200px, 62vw, 300px);
}

/* ---------- 顶部上下文 ---------- */
.page-about .about-topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px 26px;
  padding-top: 22px;
}

.page-about .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--text-dim);
}

.page-about .crumbs a {
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-about .crumbs a:hover {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .crumbs-sep {
  color: var(--mist);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(18px, 3.5vw, 38px);
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
}

.page-about .about-hero h1 {
  margin: 0 0 20px;
  text-wrap: balance;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 目录卡 ---------- */
.page-about .about-toc {
  border: 1px solid var(--line);
  border-top: 2px solid var(--clay);
  background: var(--slate-deep);
  padding: 18px 16px 14px;
}

.page-about .about-toc-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-toc-link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 9px 10px;
  font-size: 14px;
  color: var(--text-dim);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-about .about-toc-link .num {
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--mist);
}

.page-about .about-toc-link:hover {
  color: var(--paper);
  background: rgba(43, 227, 210, .07);
}

.page-about .about-toc-link.is-current {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: var(--cyan-soft);
}

/* ---------- 通用区块 ---------- */
.page-about .about-block {
  padding-top: var(--about-gap);
}

.page-about .about-head {
  max-width: 720px;
}

.page-about .about-head .measure {
  margin-top: 14px;
  color: var(--text-dim);
}

.page-about .about-tint {
  position: relative;
}

.page-about .about-tint::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(78, 107, 74, .1), rgba(10, 13, 18, 0) 62%);
  pointer-events: none;
}

.page-about .about-tint > .wrap {
  position: relative;
}

/* ---------- 时间轴 ---------- */
.page-about .tl-wrap {
  position: relative;
  margin-top: 32px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--void);
}

.page-about .tl-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .15;
  pointer-events: none;
}

.page-about .tl-scale {
  position: absolute;
  left: clamp(9px, 2vw, 20px);
  top: 0;
  bottom: 0;
  width: 8px;
  background-image: repeating-linear-gradient(to bottom, rgba(43, 227, 210, .5) 0 1px, transparent 1px 16px);
  pointer-events: none;
}

.page-about .tl-inner {
  position: relative;
  padding: clamp(20px, 3.5vw, 40px) clamp(16px, 3vw, 34px) clamp(20px, 3.5vw, 40px) clamp(26px, 5vw, 56px);
}

.page-about .tl-caption {
  margin: 0 0 18px;
  color: var(--moss);
}

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

.page-about .tl-node {
  border: 1px solid var(--line);
  background: rgba(28, 34, 41, .78);
  transition: border-color .25s var(--ease), background .25s var(--ease);
}

.page-about .tl-node[open] {
  border-color: rgba(43, 227, 210, .42);
  background: rgba(28, 34, 41, .95);
}

.page-about .tl-summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 18px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .tl-summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--mist);
  transition: color .2s var(--ease);
}

.page-about .tl-node[open] .tl-summary::after {
  content: "−";
  color: var(--cyan);
}

.page-about .tl-summary:hover::after {
  color: var(--cyan);
}

.page-about .tl-year {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-about .tl-title {
  font-size: 15px;
  color: var(--paper);
}

.page-about .tl-body {
  padding: 0 16px 16px;
}

.page-about .tl-body p {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-dim);
}

/* ---------- 三类用户 ---------- */
.page-about .who-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 30px;
}

.page-about .who-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 26px 20px 22px;
  border: 1px solid var(--line);
  background: var(--slate);
  transition: transform .25s var(--ease), border-color .25s var(--ease);
}

.page-about .who-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--cyan);
}

.page-about .who-card--b::before {
  background: var(--magenta);
}

.page-about .who-card--c::before {
  background: var(--violet);
}

.page-about .who-card:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
}

.page-about .who-q {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  letter-spacing: .02em;
  color: var(--cyan);
}

.page-about .who-card--b .who-q {
  color: var(--magenta);
}

.page-about .who-card--c .who-q {
  color: var(--violet);
}

.page-about .who-figure {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.4vw, 34px);
  line-height: 1.1;
  color: var(--paper);
}

.page-about .who-figure em {
  margin-left: 8px;
  font-family: var(--font-body);
  font-style: normal;
  font-size: 13px;
  color: var(--text-dim);
}

.page-about .who-sub {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .who-card p:not(.who-figure):not(.who-q):not(.who-sub) {
  margin: 6px 0 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-about .who-link {
  margin-top: auto;
  padding-top: 12px;
  font-size: 13.5px;
  color: var(--paper);
  text-decoration: none;
  border-top: 1px solid var(--line);
  transition: color .2s var(--ease);
}

.page-about .who-link:hover {
  color: var(--cyan);
}

/* ---------- 内容与数据 ---------- */
.page-about .about-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  margin-top: 30px;
}

.page-about .flow-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 22px;
}

.page-about .flow-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.page-about .flow-item:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .flow-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--clay);
  padding-top: 3px;
}

.page-about .flow-item h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 600;
  color: var(--paper);
}

.page-about .flow-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-dim);
}

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

.page-about .about-split-figure .figure-frame {
  display: block;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  background: var(--slate-deep);
}

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

.page-about .about-split-figure .figure-caption {
  margin-top: 12px;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .team-visual {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  margin-top: 32px;
}

.page-about .team-ring {
  position: relative;
  width: var(--about-ring);
  aspect-ratio: 1;
  margin-inline: auto;
  border-radius: 50%;
  background: conic-gradient(var(--cyan) 0deg 93.9deg,
      var(--moss) 93.9deg 164.3deg,
      var(--clay) 164.3deg 281.7deg,
      rgba(122, 140, 147, .22) 281.7deg 360deg);
}

.page-about .team-ring::after {
  content: "";
  position: absolute;
  inset: 24%;
  border-radius: 50%;
  background: var(--void);
  border: 1px solid var(--line-strong);
}

.page-about .ring-center {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  text-align: center;
}

.page-about .ring-center b {
  font-family: var(--font-mono);
  font-size: clamp(30px, 6vw, 42px);
  font-weight: 500;
  line-height: 1;
  color: var(--paper);
}

.page-about .ring-center i {
  font-style: normal;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--mist);
}

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

.page-about .team-item {
  display: grid;
  grid-template-columns: 10px minmax(0, 1fr) auto;
  grid-template-areas:
    "dot name count"
    ". role role";
  align-items: center;
  gap: 6px 12px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  background: rgba(18, 23, 29, .72);
  transition: border-color .25s var(--ease), background .25s var(--ease);
}

.page-about .team-item:hover {
  border-color: var(--line-strong);
  background: rgba(28, 34, 41, .92);
}

.page-about .team-item:hover .team-role {
  color: var(--text);
}

.page-about .team-dot {
  grid-area: dot;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--cyan);
}

.page-about .team-item--edit .team-dot {
  background: var(--moss);
}

.page-about .team-item--serv .team-dot {
  background: var(--clay);
}

.page-about .team-item--ops .team-dot {
  background: var(--mist);
}

.page-about .team-name {
  grid-area: name;
  font-size: 15px;
  color: var(--paper);
}

.page-about .team-count {
  grid-area: count;
  font-family: var(--font-mono);
  font-size: 19px;
  color: var(--cyan);
}

.page-about .team-item--edit .team-count {
  color: var(--moss);
}

.page-about .team-item--serv .team-count {
  color: var(--clay);
}

.page-about .team-item--ops .team-count {
  color: var(--text-dim);
}

.page-about .team-role {
  grid-area: role;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
  transition: color .25s var(--ease);
}

/* ---------- 覆盖范围 ---------- */
.page-about .cov-block {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 26px;
  margin-top: 34px;
  padding: 24px 20px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--moss);
  background: rgba(10, 13, 18, .6);
}

.page-about .cov-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 6px;
}

.page-about .cov-cell {
  display: block;
  aspect-ratio: 1.35;
  border: 1px solid var(--line);
  background: rgba(122, 140, 147, .08);
}

.page-about .cov-cell--on {
  background: var(--moss);
  border-color: var(--moss);
}

.page-about .cov-cell--hot {
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .cov-notes {
  display: grid;
  gap: 12px;
  align-content: center;
}

.page-about .cov-note {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-about .cov-k {
  flex: 0 0 auto;
  width: 12px;
  height: 12px;
  border-radius: 2px;
  transform: translateY(1px);
}

.page-about .cov-k--moss {
  background: var(--moss);
}

.page-about .cov-k--cyan {
  background: var(--cyan);
}

.page-about .cov-figure {
  margin: 6px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 14.5px;
  color: var(--paper);
}

.page-about .cov-figure .num {
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--magenta);
}

/* ---------- 合作与资质 ---------- */
.page-about .partner-figure {
  margin: 30px 0 0;
}

.page-about .partner-figure .figure-frame {
  display: block;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  background: var(--slate-deep);
  max-height: 320px;
}

.page-about .partner-figure img {
  display: block;
  width: 100%;
  height: 100%;
  max-height: 320px;
  object-fit: cover;
  opacity: .82;
}

.page-about .cert-block {
  margin-top: 30px;
  padding: 24px 20px;
  border: 1px solid var(--line);
  border-top: 2px solid var(--clay);
  background: var(--slate-deep);
}

.page-about .cert-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .cert-tag {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 14px;
  font-size: 13.5px;
  color: var(--paper);
  background: var(--paper);
  color: var(--void);
  border: 1px solid var(--paper);
  box-shadow: 3px 3px 0 rgba(193, 102, 63, .9);
}

.page-about .cert-no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--clay);
}

.page-about .cert-note {
  margin: 18px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .partner-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-about .partner-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .partner-item h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
  color: var(--cyan);
}

.page-about .partner-item p {
  margin: 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-dim);
}

/* ---------- 本地协助 ---------- */
.page-about .about-local {
  padding-bottom: clamp(26px, 5vw, 60px);
}

.page-about .local-panel {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 4.5vw, 52px) clamp(20px, 4vw, 56px);
  border: 1px solid var(--line);
  background:
    radial-gradient(120% 140% at 88% 10%, rgba(43, 227, 210, .14), transparent 62%),
    linear-gradient(160deg, var(--slate) 0%, var(--void) 78%);
}

.page-about .local-panel::after {
  content: "";
  position: absolute;
  right: -60px;
  bottom: -80px;
  width: 240px;
  height: 240px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  pointer-events: none;
}

.page-about .local-panel .section-title {
  margin: 12px 0 0;
  max-width: 20ch;
}

.page-about .local-panel .measure {
  margin: 16px 0 0;
  color: var(--text-dim);
}

.page-about .local-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* ---------- 尾部入口 ---------- */
.page-about .about-tail {
  padding-bottom: clamp(40px, 7vw, 96px);
}

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

.page-about .tail-link {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px 20px;
  text-decoration: none;
  border: 1px solid var(--line);
  background: rgba(18, 23, 29, .7);
  transition: transform .25s var(--ease), border-color .25s var(--ease);
}

.page-about .tail-link:hover {
  transform: translateX(8px);
  border-color: rgba(43, 227, 210, .45);
}

.page-about .tail-link .index-label {
  color: var(--clay);
}

.page-about .tail-text {
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-about .partner-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 32px;
  }

  .page-about .cov-grid {
    grid-template-columns: repeat(8, minmax(0, 1fr));
  }

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

@media (min-width: 860px) {
  .page-about .who-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .cov-block {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 40px;
    padding: 30px 32px;
  }

  .page-about .team-visual {
    grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
    align-items: center;
    gap: 48px;
  }

  .page-about .team-ring {
    margin-inline: 0;
  }

  .page-about .partner-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 36px;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: start;
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
    gap: clamp(30px, 4vw, 56px);
  }

  .page-about .about-split .about-split-figure {
    position: sticky;
    top: calc(var(--masthead-h) + 24px);
  }

  .page-about .about-head {
    max-width: 780px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .who-card:hover,
  .page-about .tail-link:hover {
    transform: none;
  }
}
<<<END>>>

已在上方给出。
<<<END>>>