.page-about {
  --about-text: #cfdbe6;
  --about-index-w: 208px;
  background: var(--ink);
  color: var(--paper);
  padding: 0 0 72px;
}

.page-about .about-wrap {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 28px 0 36px;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  top: -60px;
  right: -80px;
  width: 260px;
  height: 260px;
  background: radial-gradient(circle at 40% 40%, rgba(59, 240, 210, 0.16), transparent 68%);
  pointer-events: none;
}

.page-about .about-hero .breadcrumb {
  position: relative;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-about .about-kicker {
  margin: 20px 0 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(32px, 7vw, 66px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  max-width: 19ch;
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-stats {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-about .about-stats li {
  background: var(--panel);
  padding: 16px 14px;
}

.page-about .about-stats b {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 24px;
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .about-stats span {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--muted);
}

/* ---------- 分屏骨架 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  padding-top: 32px;
}

.page-about .about-index__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}

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

.page-about .about-index__list a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  font-size: 13px;
  color: var(--muted);
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-index__list a span {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  color: var(--paper);
  border-color: var(--cyan);
  background: rgba(59, 240, 210, 0.08);
}

.page-about .about-index__list a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* 章节锚点高亮 */
.page-about:has(#position:target) .about-index__list a[href="#position"],
.page-about:has(#history:target) .about-index__list a[href="#history"],
.page-about:has(#team:target) .about-index__list a[href="#team"],
.page-about:has(#network:target) .about-index__list a[href="#network"],
.page-about:has(#method:target) .about-index__list a[href="#method"],
.page-about:has(#values:target) .about-index__list a[href="#values"] {
  color: var(--cyan);
  border-color: var(--cyan);
  background: rgba(59, 240, 210, 0.1);
}

/* ---------- 章节通用 ---------- */
.page-about .about-sec {
  padding: 34px 0 38px;
  border-top: 1px solid var(--line);
  scroll-margin-top: 24px;
}

.page-about .about-sec:first-child {
  border-top: 0;
  padding-top: 4px;
}

.page-about .sec-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 18px;
}

.page-about .sec-num {
  flex: none;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-about .sec-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(22px, 4vw, 32px);
  line-height: 1.22;
  letter-spacing: -0.005em;
}

.page-about .about-sec p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--about-text);
  max-width: 66ch;
}

.page-about .about-sec p:last-child {
  margin-bottom: 0;
}

.page-about .sec-lede {
  color: var(--muted) !important;
  font-size: 14.5px !important;
}

.page-about .about-sec h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  line-height: 1.35;
  color: var(--paper);
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 22px 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--panel);
}

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

.page-about .about-figure figcaption {
  padding: 11px 16px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--muted);
}

/* ---------- 01 定位 ---------- */
.page-about .pos-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
}

.page-about .pos-text .btn-row {
  margin-top: 20px;
}

/* ---------- 02 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
}

.page-about .tl-item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 18px 0 18px 22px;
  border-left: 1px solid var(--line);
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 24px;
  width: 16px;
  height: 2px;
  background: var(--cyan);
  transform: rotate(-45deg);
  transform-origin: left center;
}

.page-about .tl-item:hover {
  border-left-color: var(--cyan);
}

.page-about .tl-year {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-about .tl-body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
}

/* ---------- 03 角色切换 ---------- */
.page-about .role-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  border: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
}

.page-about .role-tabs {
  margin-top: 26px;
}

.page-about .role-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .role-pills label {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  font-size: 13.5px;
  color: var(--muted);
  cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .role-pills label:hover {
  color: var(--paper);
  border-color: var(--cyan);
}

.page-about #role-editor:checked ~ .role-pills label[for="role-editor"],
.page-about #role-data:checked ~ .role-pills label[for="role-data"],
.page-about #role-design:checked ~ .role-pills label[for="role-design"] {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
  font-weight: 700;
}

.page-about #role-editor:focus-visible ~ .role-pills label[for="role-editor"],
.page-about #role-data:focus-visible ~ .role-pills label[for="role-data"],
.page-about #role-design:focus-visible ~ .role-pills label[for="role-design"] {
  outline: 2px solid var(--orange);
  outline-offset: 3px;
}

.page-about .role-panes {
  margin-top: 18px;
  padding: 20px 18px;
  border-radius: var(--radius-md);
  background: var(--panel);
  border-left: 3px solid var(--cyan);
}

.page-about .role-pane {
  display: none;
}

.page-about #role-editor:checked ~ .role-panes #pane-editor,
.page-about #role-data:checked ~ .role-panes #pane-data,
.page-about #role-design:checked ~ .role-panes #pane-design {
  display: block;
}

.page-about .role-pane p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  max-width: 62ch;
}

/* ---------- 04 区域协作 ---------- */
.page-about .net-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
}

.page-about .partner-tags {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .partner-tags li {
  padding: 9px 15px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: var(--carbon);
  font-size: 13px;
  color: var(--paper);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .partner-tags li:hover {
  border-color: var(--orange);
  background: rgba(255, 122, 51, 0.1);
}

/* ---------- 05 方法 ---------- */
.page-about .method-grid {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0 34px;
}

.page-about .method-item {
  padding: 16px 0 18px;
  border-top: 1px solid var(--line);
}

.page-about .method-no {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-about .method-item p {
  font-size: 14.5px;
  line-height: 1.78;
}

/* ---------- 06 价值 ---------- */
.page-about .value-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
}

.page-about .value-list li {
  position: relative;
  padding: 16px 0 16px 22px;
  border-bottom: 1px dashed var(--line);
}

.page-about .value-list li:last-child {
  border-bottom: 0;
}

.page-about .value-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 24px;
  width: 9px;
  height: 9px;
  border-radius: 2px;
  background: var(--orange);
  transform: rotate(45deg);
}

.page-about .value-list h3 {
  color: var(--cyan);
}

.page-about .value-list p {
  font-size: 14.5px;
  line-height: 1.78;
}

/* ---------- 尾段行动 ---------- */
.page-about .about-cta {
  margin-top: 32px;
  padding: 28px 20px;
  border: 1px solid rgba(59, 240, 210, 0.28);
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, rgba(18, 74, 72, 0.85), rgba(11, 28, 46, 0.96) 62%);
}

.page-about .about-cta h2 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 3.6vw, 28px);
  line-height: 1.25;
}

.page-about .about-cta p {
  margin: 0;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-text);
}

.page-about .about-cta .btn-row {
  margin-top: 20px;
}

.page-about .about-cta__links {
  list-style: none;
  margin: 22px 0 0;
  padding: 16px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  border-top: 1px solid rgba(232, 240, 246, 0.16);
}

.page-about .about-cta__links a {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

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

.page-about .about-cta__links a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-wrap {
    padding: 0 32px;
  }

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

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

  .page-about .tl-item {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 16px;
    align-items: start;
    padding-left: 26px;
  }

  .page-about .tl-year {
    font-size: 21px;
  }

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

  .page-about .about-cta {
    padding: 36px 32px;
  }
}

@media (min-width: 860px) {
  .page-about .pos-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.85fr);
    gap: 30px;
    align-items: start;
  }

  .page-about .pos-grid .about-figure {
    margin-top: 0;
  }

  .page-about .net-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 30px;
    align-items: start;
  }

  .page-about .net-grid .about-figure {
    margin-top: 0;
  }
}

@media (min-width: 980px) {
  .page-about .about-body {
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    gap: 56px;
    padding-top: 40px;
  }

  .page-about .about-index {
    position: sticky;
    top: 28px;
    align-self: start;
  }

  .page-about .about-index__list {
    display: block;
  }

  .page-about .about-index__list li {
    margin-bottom: 2px;
  }

  .page-about .about-index__list a {
    display: flex;
    justify-content: flex-start;
    min-height: 0;
    padding: 9px 0 9px 14px;
    border: 0;
    border-left: 2px solid var(--line);
    border-radius: 0;
    font-size: 13.5px;
    color: var(--muted);
    background: transparent;
  }

  .page-about .about-index__list a:hover,
  .page-about .about-index__list a:focus-visible {
    color: var(--paper);
    border-left-color: var(--cyan);
    background: linear-gradient(90deg, rgba(59, 240, 210, 0.12), transparent 85%);
  }

  .page-about:has(#position:target) .about-index__list a[href="#position"],
  .page-about:has(#history:target) .about-index__list a[href="#history"],
  .page-about:has(#team:target) .about-index__list a[href="#team"],
  .page-about:has(#network:target) .about-index__list a[href="#network"],
  .page-about:has(#method:target) .about-index__list a[href="#method"],
  .page-about:has(#values:target) .about-index__list a[href="#values"] {
    color: var(--cyan);
    border-left-color: var(--cyan);
    background: linear-gradient(90deg, rgba(59, 240, 210, 0.14), transparent 85%);
  }

  .page-about .about-sec {
    padding: 44px 0 48px;
    scroll-margin-top: 32px;
  }

  .page-about .about-sec:first-child {
    padding-top: 0;
  }

  .page-about .about-sec p {
    font-size: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-index__list a,
  .page-about .role-pills label,
  .page-about .partner-tags li,
  .page-about .about-cta__links a {
    transition: none;
  }
}
<<<END>>>