.page-about {
  --about-rail-w: 236px;
  --about-top: 112px;
  --about-block-gap: clamp(52px, 7vw, 104px);
  display: block;
  background: var(--ink);
  color: var(--paper);
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(95% 130% at 6% -12%, rgba(31, 111, 74, .5), transparent 62%),
    radial-gradient(70% 90% at 102% 0%, rgba(77, 163, 255, .13), transparent 64%),
    var(--ink);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(125% 95% at 12% 0%, #000 26%, transparent 76%);
  mask-image: radial-gradient(125% 95% at 12% 0%, #000 26%, transparent 76%);
  pointer-events: none;
}

.page-about .about-hero > .container {
  position: relative;
  z-index: 1;
  padding-top: clamp(26px, 4vw, 46px);
  padding-bottom: clamp(38px, 5.5vw, 68px);
}

.page-about .about-frame {
  position: relative;
  margin-top: clamp(20px, 3vw, 34px);
  padding: clamp(24px, 4.4vw, 58px);
  border: 1px solid var(--line);
  background: rgba(20, 24, 27, .62);
}

.page-about .about-frame::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 5px;
  background: repeating-linear-gradient(90deg, var(--lime) 0 3px, transparent 3px 18px);
  opacity: .55;
}

.page-about .about-frame::after {
  content: "";
  position: absolute;
  right: clamp(24px, 4.4vw, 58px);
  bottom: clamp(24px, 4.4vw, 58px);
  width: 34px;
  height: 34px;
  border-right: 2px solid var(--lime);
  border-bottom: 2px solid var(--lime);
  pointer-events: none;
}

.page-about .about-hero-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--lime);
}

.page-about .about-hero-title {
  margin: clamp(14px, 2vw, 22px) 0 0;
  max-width: 20ch;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: clamp(30px, 6vw, 62px);
  line-height: 1.06;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-about .about-hero-lead {
  margin: clamp(18px, 2.4vw, 28px) 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.25vw, 18px);
  line-height: 1.85;
  color: rgba(244, 247, 245, .82);
}

.page-about .about-hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(24px, 3.6vw, 44px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-hero-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  background: rgba(20, 24, 27, .9);
}

.page-about .about-num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 4.4vw, 48px);
  line-height: 1;
  letter-spacing: .02em;
  color: var(--lime);
}

.page-about .about-num em {
  font-style: normal;
  font-size: .52em;
  margin-left: 3px;
  color: rgba(198, 255, 61, .72);
}

.page-about .about-stat-label {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--muted);
}

/* ---------- 目录与画布 ---------- */

.page-about .about-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 56px);
  padding-top: clamp(34px, 5vw, 72px);
  padding-bottom: clamp(60px, 8vw, 118px);
}

.page-about .about-rail {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 9px 0;
}

.page-about .about-rail .toc-title {
  display: none;
}

.page-about .about-toc .toc-list {
  display: flex;
  gap: 7px;
  margin: 0;
  padding: 0 2px 2px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-toc .toc-list::-webkit-scrollbar {
  display: none;
}

.page-about .about-toc .toc-link {
  display: block;
  white-space: nowrap;
  padding: 7px 12px;
  border: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.2;
  color: var(--muted);
  text-decoration: none;
  transition: color .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}

.page-about .about-toc .toc-link:hover {
  color: var(--paper);
  border-color: rgba(244, 247, 245, .3);
}

.page-about .about-toc .toc-link.is-active {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
}

.page-about .about-canvas {
  display: grid;
  gap: var(--about-block-gap);
  min-width: 0;
}

/* ---------- 区块骨架 ---------- */

.page-about .about-block {
  scroll-margin-top: 132px;
  min-width: 0;
}

.page-about .about-block-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  margin-bottom: clamp(20px, 2.6vw, 30px);
  border-bottom: 1px solid var(--line);
}

.page-about .about-block-index {
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--lime);
}

.page-about .about-block-title {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(21px, 2.6vw, 32px);
  line-height: 1.2;
  letter-spacing: .02em;
  color: var(--paper);
}

.page-about .about-block p {
  max-width: 68ch;
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(244, 247, 245, .84);
}

.page-about .about-lede {
  font-size: clamp(17px, 1.4vw, 20px) !important;
  line-height: 1.7 !important;
  color: var(--paper) !important;
  padding-left: 16px;
  border-left: 3px solid var(--green);
}

.page-about .about-sub {
  margin: clamp(26px, 3.4vw, 42px) 0 14px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(16px, 1.5vw, 19px);
  letter-spacing: .03em;
  color: var(--paper);
}

.page-about .about-note {
  max-width: 64ch;
  margin: 14px 0 0;
  padding: 12px 16px;
  border-left: 2px solid var(--line-lime);
  background: rgba(14, 59, 42, .34);
  font-size: 14px !important;
  line-height: 1.75 !important;
  color: var(--muted) !important;
}

/* ---------- 图片容器 ---------- */

.page-about .media-frame {
  margin: clamp(22px, 3vw, 34px) 0;
  border: 1px solid var(--line);
  background: var(--panel);
  overflow: hidden;
}

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

.page-about .media-frame-wide img {
  aspect-ratio: 16 / 9;
}

.page-about .media-frame-4x3 img {
  aspect-ratio: 4 / 3;
}

.page-about .media-caption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .03em;
  color: var(--muted);
}

/* ---------- 运营地 ---------- */

.page-about .about-loc {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 2.4vw, 28px);
  align-items: start;
}

.page-about .about-loc .media-frame {
  margin: 0;
}

.page-about .about-loc-facts {
  padding: clamp(18px, 2.2vw, 26px);
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-about .about-loc-facts-title {
  margin: 0 0 14px !important;
  font-family: var(--font-mono);
  font-size: 12px !important;
  letter-spacing: .14em;
  color: var(--lime) !important;
  max-width: none !important;
}

.page-about .about-kv {
  display: grid;
  grid-template-columns: minmax(84px, auto) minmax(0, 1fr);
  gap: 10px 14px;
  font-size: 14px;
  line-height: 1.6;
}

.page-about .about-kv .kv-key {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  padding-top: 2px;
}

.page-about .about-kv .kv-value {
  color: var(--paper);
  word-break: break-word;
}

/* ---------- 团队与流程 ---------- */

.page-about .about-team-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 36px);
  align-items: start;
}

.page-about .about-team-grid .media-frame {
  margin: 0;
}

.page-about .about-team-flow .about-sub {
  margin-top: 0;
}

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

.page-about .about-flow-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 14px 16px 0;
  background: var(--ink);
}

.page-about .about-flow-num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 26px;
  line-height: 1;
  color: var(--green);
  text-align: right;
}

.page-about .about-flow-name {
  display: block;
  margin-bottom: 5px;
  font-family: var(--font-heading);
  font-size: 15px;
  letter-spacing: .03em;
  color: var(--paper);
}

.page-about .about-flow-body p {
  margin: 0 !important;
  font-size: 14px !important;
  line-height: 1.78 !important;
  color: rgba(244, 247, 245, .74) !important;
}

/* ---------- 时间线 ---------- */

.page-about .about-timeline {
  position: relative;
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 55px;
  top: 10px;
  bottom: 26px;
  width: 1px;
  background: linear-gradient(180deg, var(--line-lime), var(--line) 62%, transparent);
}

.page-about .about-tl-node {
  position: relative;
  display: grid;
  grid-template-columns: 60px minmax(0, 1fr);
  gap: 16px;
  padding-bottom: 28px;
}

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

.page-about .about-tl-node::before {
  content: "";
  position: absolute;
  left: 51px;
  top: 8px;
  width: 9px;
  height: 9px;
  background: var(--lime);
}

.page-about .about-tl-year {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--lime);
  padding-top: 5px;
  text-align: right;
}

.page-about .about-tl-card {
  padding: 0 0 0 2px;
}

.page-about .about-tl-title {
  margin: 0 0 6px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(16px, 1.6vw, 19px);
  letter-spacing: .02em;
  color: var(--paper);
}

.page-about .about-tl-card p {
  margin: 0 !important;
  font-size: 15px !important;
  max-width: 60ch !important;
  color: rgba(244, 247, 245, .76) !important;
}

/* ---------- 覆盖范围 ---------- */

.page-about .about-coverage-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(20px, 3vw, 32px) 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-coverage-stats .stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px;
  background: var(--green-deep);
}

.page-about .about-coverage-stats .stat-value {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1;
  color: var(--paper);
}

.page-about .about-coverage-stats .stat-value em {
  font-style: normal;
  font-size: .55em;
  color: var(--lime);
  margin-left: 2px;
}

.page-about .about-coverage-stats .stat-label {
  font-size: 13px;
  color: rgba(244, 247, 245, .7);
  letter-spacing: .04em;
}

.page-about .about-league-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-league-list li {
  padding: 8px 14px;
  border: 1px solid var(--line);
  font-size: 14px;
  color: var(--paper);
  background: rgba(42, 49, 54, .5);
}

.page-about .about-league-list .about-league-more {
  color: var(--lime);
  border-color: var(--line-lime);
  background: transparent;
}

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

.page-about .about-doc-list li {
  padding: 15px 16px;
  background: var(--ink);
  font-size: 15px;
  line-height: 1.75;
  color: rgba(244, 247, 245, .78);
}

.page-about .about-doc-list strong {
  display: inline-block;
  min-width: 8.5em;
  margin-right: 8px;
  font-family: var(--font-heading);
  color: var(--lime);
  letter-spacing: .02em;
}

/* ---------- 合作生态 ---------- */

.page-about .about-partner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(20px, 3vw, 30px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-partner-cell {
  padding: clamp(20px, 2.6vw, 30px);
  background: var(--panel);
}

.page-about .about-partner-cell:first-child {
  background: linear-gradient(150deg, var(--green) 0%, var(--green-deep) 100%);
}

.page-about .about-partner-count {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(48px, 8vw, 96px);
  line-height: .9;
  color: var(--lime);
  letter-spacing: .01em;
}

.page-about .about-partner-label {
  margin: 10px 0 0 !important;
  max-width: 22ch !important;
  font-size: 15px !important;
  line-height: 1.6 !important;
  color: var(--paper) !important;
}

.page-about .about-partner-desc {
  margin: 10px 0 0 !important;
  font-size: 13px !important;
  color: rgba(244, 247, 245, .72) !important;
}

.page-about .about-partner-cell .list-dot {
  margin: 12px 0 0;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.9;
  color: rgba(244, 247, 245, .8);
}

/* ---------- 荣誉 ---------- */

.page-about .about-badges {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-badge {
  position: relative;
  padding: 22px 20px 20px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold);
  background: var(--panel);
}

.page-about .about-badge .tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
}

.page-about .about-badge-name {
  margin: 12px 0 0 !important;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(16px, 1.7vw, 20px) !important;
  color: var(--paper) !important;
}

.page-about .about-badge-desc {
  margin: 8px 0 0 !important;
  font-size: 14px !important;
  line-height: 1.75 !important;
  color: var(--muted) !important;
}

/* ---------- 服务路径 ---------- */

.page-about .about-tree {
  display: block;
  width: 100%;
  max-width: 620px;
  height: auto;
  margin: clamp(16px, 2.4vw, 26px) 0 0;
}

.page-about .about-tree-line {
  stroke: var(--line-lime);
  stroke-width: 1;
}

.page-about .about-tree-node {
  fill: var(--lime);
}

.page-about .about-steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(18px, 2.6vw, 28px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-about .about-step {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 0 16px;
  padding: 20px 18px;
  background: var(--ink);
  transition: background .2s var(--ease);
}

.page-about .about-step[data-done] {
  background: rgba(31, 111, 74, .22);
}

.page-about .about-step .step-index {
  grid-row: span 2;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 30px;
  line-height: 1;
  color: var(--green);
}

.page-about .about-step[data-done] .step-index {
  color: var(--lime);
}

.page-about .about-step .step-title {
  margin: 0 0 8px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(16px, 1.6vw, 19px);
  letter-spacing: .02em;
  color: var(--paper);
}

.page-about .about-step .step-body p {
  margin: 0 0 14px !important;
  font-size: 15px !important;
  line-height: 1.8 !important;
  color: rgba(244, 247, 245, .78) !important;
}

.page-about .about-step-toggle {
  appearance: none;
  display: inline-block;
  padding: 7px 14px;
  border: 1px solid var(--line);
  background: transparent;
  font-family: var(--font-body);
  font-size: 13px;
  letter-spacing: .03em;
  color: var(--muted);
  cursor: pointer;
  transition: color .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}

.page-about .about-step-toggle:hover {
  color: var(--paper);
  border-color: rgba(244, 247, 245, .34);
}

.page-about .about-step[data-done] .about-step-toggle {
  color: var(--ink);
  background: var(--lime);
  border-color: var(--lime);
}

/* ---------- 延伸入口 ---------- */

.page-about .about-links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(28px, 4vw, 48px);
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-link {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 17px 4px;
  background: var(--ink);
  text-decoration: none;
  transition: background .18s var(--ease);
}

.page-about .about-link:hover {
  background: rgba(31, 111, 74, .2);
}

.page-about .about-link-label {
  flex: none;
  min-width: 8em;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: .03em;
  color: var(--lime);
}

.page-about .about-link-desc {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(244, 247, 245, .72);
}

/* ---------- 平板 ---------- */

@media (min-width: 700px) {
  .page-about .about-hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-partner-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  }

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

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

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

  .page-about .about-loc {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  }
}

/* ---------- 桌面：左栏跟随 ---------- */

@media (min-width: 1000px) {
  .page-about .about-shell {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(40px, 4.6vw, 76px);
  }

  .page-about .about-rail {
    border: 0;
    padding: 0;
  }

  .page-about .about-rail-inner {
    position: sticky;
    top: var(--about-top);
  }

  .page-about .about-rail .toc-title {
    display: block;
    margin: 0 0 14px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--line);
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: .16em;
    color: var(--muted);
  }

  .page-about .about-toc .toc-list {
    display: grid;
    gap: 2px;
    padding: 0;
    overflow: visible;
  }

  .page-about .about-toc .toc-link {
    padding: 9px 10px 9px 14px;
    border: 0;
    border-left: 2px solid transparent;
    font-size: 14px;
  }

  .page-about .about-toc .toc-link.is-active {
    color: var(--lime);
    background: rgba(198, 255, 61, .07);
    border-left-color: var(--lime);
  }

  .page-about .about-toc .toc-link:hover {
    color: var(--paper);
    background: rgba(244, 247, 245, .05);
  }
}

/* ---------- 大屏 ---------- */

@media (min-width: 1280px) {
  .page-about .about-doc-list li {
    display: grid;
    grid-template-columns: minmax(0, 200px) minmax(0, 1fr);
    gap: 0 14px;
    align-items: baseline;
  }

  .page-about .about-doc-list strong {
    min-width: 0;
    margin-right: 0;
  }
}

/* ---------- 动效偏好 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-about .about-toc .toc-link,
  .page-about .about-step,
  .page-about .about-step-toggle,
  .page-about .about-link {
    transition: none;
  }
}
<<<END>>>