.page-about {
  display: block;
  overflow-x: hidden;
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-body);
  padding-bottom: 72px;
}

.page-about a {
  color: inherit;
  text-decoration: none;
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: 20px;
}

.page-about .hero-media {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.page-about .hero-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: 200px;
  object-fit: cover;
  filter: saturate(0.9);
}

.page-about .hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(5, 11, 24, 0.08) 0%, rgba(5, 11, 24, 0.55) 58%, rgba(5, 11, 24, 0.95) 100%);
}

.page-about .hero-media .media-caption {
  position: absolute;
  left: 14px;
  bottom: 12px;
  z-index: 1;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-about .hero-panel {
  position: relative;
  z-index: 2;
  margin: -52px 12px 0;
  padding: 22px 18px 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.page-about .breadcrumb {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--dim);
}

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

.page-about .breadcrumb-list li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-about .breadcrumb-list li + li::before {
  content: "/";
  color: var(--line);
}

.page-about .breadcrumb-list a {
  color: var(--muted);
  transition: color 0.16s var(--ease);
}

.page-about .breadcrumb-list a:hover {
  color: var(--cyan);
}

.page-about .hero-panel .kicker {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .hero-panel h1 {
  margin: 12px 0 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(27px, 5.6vw, 54px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--text);
  text-wrap: balance;
}

.page-about .hero-panel .lede {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin-top: 24px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .hero-stat {
  padding: 14px 14px 13px;
  background: var(--panel-2);
}

.page-about .hero-stat b {
  display: block;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.01em;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

.page-about .hero-stat span {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  color: var(--muted);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-section {
  padding-top: 62px;
}

.page-about .section-head {
  margin-bottom: 26px;
  max-width: 46ch;
}

.page-about .chapter-num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .section-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 3.6vw, 36px);
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--text);
}

.page-about .section-sub {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 01 起点 ---------- */
.page-about .origin-split {
  display: grid;
  gap: 20px;
}

.page-about .origin-text p {
  margin: 0 0 16px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

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

.page-about .origin-note {
  padding: 18px 18px 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-top: 2px solid var(--cyan);
  border-radius: var(--radius);
}

.page-about .origin-note > p {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--dim);
}

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

.page-about .origin-note li {
  padding: 5px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan-soft);
  background: rgba(53, 230, 224, 0.08);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-about .origin-tail {
  margin: 24px 0 0;
  padding-left: 16px;
  max-width: 68ch;
  border-left: 2px solid var(--cyan);
  font-size: 15px;
  line-height: 1.85;
  color: var(--text);
}

/* ---------- 02 时间轴 ---------- */
.page-about .tl {
  position: relative;
  margin: 0;
  padding: 0 0 0 22px;
  list-style: none;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--line) 24%, var(--line) 100%);
}

.page-about .tl-node {
  position: relative;
  padding-bottom: 30px;
}

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

.page-about .tl-node::before {
  content: "";
  position: absolute;
  left: -22px;
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(53, 230, 224, 0.12);
}

.page-about .tl-label {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  border-radius: var(--radius);
}

.page-about .tl-year {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
  transition: color 0.16s var(--ease);
}

.page-about .tl-ver {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-about .tl-label:hover .tl-year {
  color: var(--cyan-soft);
}

.page-about .tl-panel {
  margin-top: 12px;
  padding: 18px 18px 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 2px solid var(--line);
  border-radius: var(--radius);
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.page-about .tl-panel:hover {
  transform: translateY(-2px);
  border-left-color: var(--cyan);
  box-shadow: var(--shadow);
}

.page-about .tl-panel:target {
  border-left-color: var(--orange);
  box-shadow: 0 0 0 1px rgba(255, 138, 61, 0.35), var(--shadow);
}

.page-about .tl-panel h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
}

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

.page-about .tl-figure {
  margin: 32px 0 0;
}

.page-about .tl-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  object-fit: cover;
  background: var(--panel);
}

.page-about .tl-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--dim);
}

/* ---------- 版本对照表 ---------- */
.page-about .ver-block {
  margin-top: 34px;
}

.page-about .ver-block > h3 {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--dim);
}

.page-about .ver-table-wrap {
  overflow-x: auto;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  -webkit-overflow-scrolling: touch;
}

.page-about .ver-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-about .ver-table th,
.page-about .ver-table td {
  padding: 13px 15px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.page-about .ver-table thead th {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--orange);
  white-space: nowrap;
  background: var(--panel-2);
  border-bottom: 1px solid var(--orange);
}

.page-about .ver-table tbody th {
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  background: var(--panel);
}

.page-about .ver-table td {
  color: var(--muted);
  line-height: 1.7;
}

.page-about .ver-table tbody tr:last-child th,
.page-about .ver-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-about .ver-table tbody tr:hover td {
  color: var(--text);
}

/* ---------- 03 团队 ---------- */
.page-about .team-layout {
  display: grid;
  gap: 26px;
}

.page-about .team-intro {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .team-grid {
  display: grid;
  gap: 10px;
  margin-top: 22px;
}

.page-about .team-card {
  padding: 16px 16px 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.page-about .team-card:hover {
  transform: translateY(-2px);
  border-color: rgba(53, 230, 224, 0.45);
  box-shadow: var(--shadow);
}

.page-about .team-count {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-about .team-card--data .team-count {
  color: var(--orange);
}

.page-about .team-card h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}

.page-about .team-card p {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .team-tail {
  margin: 22px 0 0;
  padding-left: 16px;
  max-width: 66ch;
  border-left: 2px solid var(--orange);
  font-size: 15px;
  line-height: 1.85;
  color: var(--text);
}

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

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

.page-about .team-figure figcaption {
  padding: 10px 14px 12px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.7;
  letter-spacing: 0.04em;
  color: var(--dim);
}

/* ---------- 04 覆盖 ---------- */
.page-about .coverage-layout {
  display: grid;
  gap: 24px;
}

.page-about .coverage-map {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 100% at 28% 18%, rgba(53, 230, 224, 0.12) 0%, rgba(5, 11, 24, 0) 62%),
    var(--panel);
}

.page-about .city-map {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  color: var(--cyan-soft);
}

.page-about .coverage-text > p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-about .coverage-list {
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-about .coverage-list li {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 12px;
  align-items: baseline;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .coverage-list .mono {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-about .coverage-list strong {
  display: block;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
}

.page-about .coverage-list em {
  display: block;
  margin-top: 4px;
  font-style: normal;
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

.page-about .coverage-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin-top: 28px;
  overflow: hidden;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-about .cv-stat {
  padding: 14px 14px 13px;
  background: var(--panel-2);
}

.page-about .cv-stat b {
  display: block;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

.page-about .cv-stat span {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  color: var(--muted);
}

/* ---------- 05 合作 ---------- */
.page-about .partner-grid {
  display: grid;
  gap: 22px;
}

.page-about .partner-col h3 {
  margin: 0 0 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--orange);
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}

.page-about .partner-col h3 .mono {
  margin-right: 6px;
  font-family: var(--font-mono);
  font-size: 20px;
  font-variant-numeric: tabular-nums;
  color: var(--orange);
}

.page-about .partner-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .partner-list li {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 10px;
  align-items: baseline;
  padding: 11px 6px;
  border-bottom: 1px solid rgba(36, 57, 92, 0.6);
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
  transition: background-color 0.16s var(--ease), color 0.16s var(--ease);
}

.page-about .partner-list li:hover {
  background: var(--panel-2);
  color: var(--text);
}

.page-about .partner-list .mono {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--dim);
}

.page-about .honor-band {
  margin-top: 30px;
  padding: 20px 20px 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-left: 2px solid var(--cyan);
  border-radius: var(--radius);
}

.page-about .honor-band h3 {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--dim);
}

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

.page-about .honor-band li {
  display: flex;
  gap: 12px;
  align-items: baseline;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}

.page-about .honor-band .mono {
  flex: none;
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  color: var(--cyan);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  padding-top: 62px;
}

.page-about .cta-panel {
  padding: 26px 20px 24px;
  background: linear-gradient(140deg, var(--panel-2) 0%, var(--panel) 58%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.page-about .cta-panel h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 3vw, 28px);
  letter-spacing: -0.015em;
  color: var(--text);
}

.page-about .cta-panel p {
  margin: 12px 0 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 断点 ---------- */
@media (min-width: 560px) {
  .page-about .team-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 720px) {
  .page-about .hero-media img {
    height: 340px;
  }

  .page-about .hero-panel {
    margin: -76px 30px 0;
    padding: 30px 32px 28px;
  }

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

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

  .page-about .honor-band ul {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }

  .page-about .cta-panel {
    padding: 34px 34px 30px;
  }
}

@media (min-width: 780px) {
  .page-about .partner-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (min-width: 860px) {
  .page-about .about-section {
    padding-top: 92px;
  }

  .page-about .origin-split {
    grid-template-columns: 1.62fr 1fr;
    gap: 32px;
    align-items: start;
  }

  .page-about .tl {
    padding-left: 0;
  }

  .page-about .tl::before {
    left: 148px;
    top: 12px;
    bottom: 12px;
  }

  .page-about .tl-node {
    display: grid;
    grid-template-columns: 148px 1fr;
    column-gap: 36px;
    padding-bottom: 40px;
  }

  .page-about .tl-node::before {
    left: 144px;
    top: 12px;
  }

  .page-about .tl-label {
    flex-direction: column;
    flex-wrap: nowrap;
    align-items: flex-end;
    gap: 6px;
    padding-right: 24px;
    padding-top: 2px;
  }

  .page-about .tl-year {
    font-size: 44px;
  }

  .page-about .tl-panel {
    margin-top: 0;
    padding: 22px 24px 24px;
  }

  .page-about .coverage-layout {
    grid-template-columns: 1fr 1.15fr;
    gap: 40px;
    align-items: center;
  }

  .page-about .coverage-stats {
    margin-top: 34px;
  }
}

@media (min-width: 900px) {
  .page-about .team-layout {
    grid-template-columns: 1.4fr 1fr;
    gap: 36px;
    align-items: start;
  }
}

@media (min-width: 1100px) {
  .page-about .hero-media img {
    height: 400px;
  }

  .page-about .hero-panel {
    margin: -92px 44px 0;
    padding: 36px 40px 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 0.01ms !important;
  }

  .page-about .tl-panel:hover,
  .page-about .team-card:hover {
    transform: none;
  }
}