.page-about {
  --about-gutter: 24px;
  --about-radius: 28px;
  background: var(--ink);
  color: var(--paper);
}

.page-about .about-hero {
  padding-top: 28px;
  padding-bottom: 8px;
}

.page-about .breadcrumb {
  margin-bottom: 34px;
}

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

.page-about .about-hero-copy .display {
  margin: 14px 0 0;
  max-width: 20ch;
  letter-spacing: -0.02em;
}

.page-about .about-hero-copy .lede {
  margin-top: 20px;
  max-width: 52ch;
  color: var(--muted);
}

.page-about .about-hero-copy .btn-row {
  margin-top: 28px;
}

.page-about .about-hero-card {
  position: relative;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  padding: 26px 22px 22px;
  overflow: hidden;
  background-image: radial-gradient(circle at 82% 8%, rgba(198, 255, 61, 0.16), transparent 58%);
}

.page-about .about-card-kicker {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lime);
}

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

.page-about .hero-stat {
  background: var(--ink-2);
  padding: 16px 14px 18px;
}

.page-about .hero-stat-value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 5vw, 32px);
  font-weight: 700;
  line-height: 1.05;
  color: var(--lime);
  letter-spacing: -0.02em;
}

.page-about .hero-stat-label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.4;
  color: var(--muted);
}

.page-about .about-card-note {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* .page-about 布局 */
.page-about .about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 56px;
  padding-top: 76px;
  padding-bottom: 88px;
}

.page-about .about-main {
  display: grid;
  gap: 72px;
  min-width: 0;
}

.page-about .about-section {
  padding-block: 0;
  scroll-margin-top: 120px;
}

.page-about .about-section-head {
  margin-bottom: 28px;
  max-width: 62ch;
}

.page-about .about-section-head .lede {
  margin-top: 14px;
  color: var(--muted);
}

/* TOC 侧栏 */
.page-about .about-toc {
  display: none;
}

.page-about .about-toc .toc-title {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
}

.page-about .about-toc .toc-link[aria-current="true"] {
  color: var(--lime);
}

/* ===== 品牌起点 ===== */
.page-about .about-origin-grid {
  display: grid;
  gap: 32px;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .about-origin-copy .h2 {
  margin-top: 12px;
}

.page-about .about-origin-copy p {
  margin-top: 18px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-origin-copy p:first-of-type {
  color: var(--paper);
}

.page-about .about-origin-card {
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  padding: 26px 22px;
}

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

.page-about .chip {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 14px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

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

.page-about .chip-num {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--grid-cyan);
  padding-top: 3px;
}

.page-about .chip-title {
  font-weight: 700;
  font-size: 16px;
  color: var(--paper);
}

.page-about .chip-note {
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
}

/* ===== 时间轴 ===== */
.page-about .about-timeline {
  position: relative;
  border-radius: var(--about-radius);
  border: 1px solid var(--line);
  background: var(--ink-2);
  padding: 34px 20px 30px;
  overflow: hidden;
}

.page-about .about-timeline-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.16;
  pointer-events: none;
}

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

.page-about .timeline-node {
  position: relative;
  background: rgba(7, 19, 15, 0.78);
  border: 1px solid var(--line-strong);
  border-radius: var(--r-md);
  padding: 22px 18px 20px;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.page-about .timeline-node:hover {
  border-color: var(--lime);
  background: rgba(7, 19, 15, 0.9);
}

.page-about .timeline-year {
  display: block;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
  letter-spacing: -0.03em;
}

.page-about .timeline-title {
  margin: 12px 0 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .timeline-text {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ===== 数据方法 ===== */
.page-about .about-method-grid {
  display: grid;
  gap: 32px;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .method-summary {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 20px 18px;
}

.page-about .method-summary p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper);
}

.page-about .method-lead {
  margin: 26px 0 14px;
  font-size: 14px;
  color: var(--muted);
}

.page-about .about-viewgrid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .about-viewgrid li {
  border: 1px solid var(--line-strong);
  border-radius: var(--r-pill);
  padding: 10px 14px;
  font-size: 13px;
  font-weight: 700;
  color: var(--paper);
  text-align: center;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.page-about .about-viewgrid li:hover {
  border-color: var(--lime);
  color: var(--lime);
}

.page-about .method-terms {
  margin-top: 26px;
  border-top: 1px solid var(--line-strong);
}

.page-about .method-term {
  border-bottom: 1px solid var(--line);
  padding: 14px 0;
}

.page-about .method-term summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
}

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

.page-about .method-term summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--lime);
  flex: none;
}

.page-about .method-term[open] summary::after {
  content: "−";
}

.page-about .method-term p {
  margin: 12px 0 4px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-links {
  margin-top: 24px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-links a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(198, 255, 61, 0.4);
  padding-bottom: 1px;
  transition: border-color 0.2s ease;
}

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

.page-about .about-method-media {
  position: relative;
  margin: 0;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--surface);
}

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

.page-about .about-method-media .media-caption {
  padding: 12px 16px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

/* ===== 团队 ===== */
.page-about .about-team-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-bottom: 1px solid var(--line);
}

.page-about .team-row {
  display: grid;
  gap: 6px 16px;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "idx name"
    "text text";
  padding: 24px 0;
  border-top: 1px solid var(--line);
  transition: border-color 0.2s ease;
}

.page-about .team-row:first-child {
  border-top: 0;
}

.page-about .team-row:hover {
  border-top-color: var(--lime);
}

.page-about .team-index {
  grid-area: idx;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--grid-cyan);
  padding-top: 5px;
}

.page-about .team-name {
  grid-area: name;
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .team-text {
  grid-area: text;
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ===== 合作生态 ===== */
.page-about .about-partners-grid {
  display: grid;
  gap: 30px;
  grid-template-columns: minmax(0, 1fr);
}

.page-about .about-network {
  position: relative;
  border-radius: var(--about-radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--ink-2);
  aspect-ratio: 10 / 7;
}

.page-about .about-network-img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  opacity: 0.82;
}

.page-about .net-node {
  position: absolute;
  display: block;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 6px rgba(198, 255, 61, 0.16);
  cursor: pointer;
  outline: none;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.page-about .net-node:hover,
.page-about .net-node:focus-visible {
  transform: scale(1.15);
  box-shadow: 0 0 0 7px rgba(198, 255, 61, 0.3);
}

.page-about .net-node--a { top: 22%; left: 20%; }
.page-about .net-node--b { top: 60%; left: 30%; }
.page-about .net-node--c { top: 32%; left: 64%; }
.page-about .net-node--d { top: 72%; left: 76%; }

.page-about .net-label {
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--lime);
  color: var(--ink);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.2;
  padding: 6px 12px;
  border-radius: var(--r-pill);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.page-about .net-node:hover .net-label,
.page-about .net-node:focus-visible .net-label {
  opacity: 1;
  transform: translateX(-50%) translateY(-3px);
}

.page-about .about-partners-copy p {
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .partners-stat-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 0 0 22px;
}

.page-about .partners-stat {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 16px 14px;
}

.page-about .partners-stat-value {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
  letter-spacing: -0.02em;
}

.page-about .partners-stat-label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted);
}

/* ===== 运营与支持 ===== */
.page-about .about-local {
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--about-radius);
  padding: 30px 22px;
}

.page-about .about-local-head .h2 {
  margin-top: 12px;
}

.page-about .about-local-head p {
  margin-top: 16px;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .about-local-lines {
  margin-top: 28px;
  border-top: 1px solid var(--line);
}

.page-about .about-local-lines .contact-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-local-lines .contact-key {
  flex: 0 0 48px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--grid-cyan);
  text-transform: uppercase;
}

.page-about .about-local-lines .contact-value {
  font-size: 14px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-all;
  min-width: 0;
}

.page-about .about-local-note {
  margin: 22px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .about-local .btn-row {
  margin-top: 24px;
}

/* ===== 响应式 ===== */
@media (min-width: 760px) {
  .page-about .hero-stat-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-network {
    aspect-ratio: 16 / 9;
  }

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

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

  .page-about .timeline-node::before {
    content: "";
    position: absolute;
    top: -9px;
    left: 50%;
    width: 9px;
    height: 9px;
    margin-left: -4.5px;
    border-radius: 50%;
    background: var(--lime);
    box-shadow: 0 0 0 4px rgba(198, 255, 61, 0.18);
  }

  .page-about .about-timeline {
    padding: 44px 32px 36px;
  }

  .page-about .team-row {
    grid-template-columns: 64px 200px minmax(0, 1fr);
    grid-template-areas: "idx name text";
    align-items: baseline;
  }

  .page-about .about-method-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
    gap: 36px;
  }

  .page-about .about-method-media {
    position: sticky;
    top: 120px;
  }

  .page-about .about-partners-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    align-items: center;
    gap: 36px;
  }

  .page-about .about-origin-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 36px;
    align-items: start;
  }
}

@media (min-width: 920px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 40px;
    align-items: end;
  }

  .page-about .about-hero {
    padding-top: 44px;
  }

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

  .page-about .about-local {
    padding: 40px 34px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-body {
    grid-template-columns: minmax(0, 1fr) 200px;
    gap: 64px;
  }

  .page-about .about-toc {
    display: block;
    position: sticky;
    top: 124px;
    align-self: start;
  }
}
<<<END>>>