.page-about {
  --about-rule: 2px solid var(--ink);
  --about-hair: 1px solid rgba(143, 165, 184, 0.55);
  --about-tint: rgba(143, 165, 184, 0.22);
  background: var(--paper);
  color: var(--ink);
}

.page-about .about-shell {
  padding-bottom: 72px;
}

.page-about .breadcrumbs {
  padding: 20px 0 4px;
  font-size: 13px;
  color: var(--moss);
}

.page-about .breadcrumbs a {
  color: var(--moss);
  text-decoration: none;
  border-bottom: 1px solid rgba(45, 91, 77, 0.4);
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: 28px;
  padding: 20px 0 44px;
  border-bottom: var(--about-rule);
}

.page-about .about-hero-copy h1 {
  margin: 12px 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.1rem, 7vw, 3.6rem);
  line-height: 1.14;
  letter-spacing: -0.03em;
  max-width: 16em;
}

.page-about .about-lede {
  font-size: clamp(1rem, 1.6vw, 1.12rem);
  line-height: 1.8;
  color: var(--ink);
  max-width: 34em;
}

.page-about .about-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
  padding: 0;
  list-style: none;
}

.page-about .about-facts .pill {
  border: 2px solid var(--ink);
  background: var(--paper-white);
  color: var(--ink);
  padding: 6px 14px;
  font-size: 12px;
  letter-spacing: 0.08em;
}

.page-about .about-hero-visual {
  margin: 0;
}

.page-about .about-hero-visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  border: var(--about-rule);
  box-shadow: var(--shadow-hard);
  clip-path: polygon(0 3%, 100% 0, 100% 97%, 0 100%);
}

.page-about .image-caption {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--moss);
}

/* ---------- 主体骨架 ---------- */
.page-about .about-body {
  display: grid;
  gap: 8px;
  padding-top: 40px;
}

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

.page-about .toc-title {
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--orange);
  margin-bottom: 14px;
}

.page-about .about-toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 2px solid var(--ink);
}

.page-about .about-toc li {
  margin: 0;
}

.page-about .about-toc a {
  display: flex;
  gap: 10px;
  align-items: baseline;
  padding: 9px 0 9px 14px;
  font-size: 14px;
  line-height: 1.4;
  color: var(--ink);
  text-decoration: none;
  border-left: 2px solid transparent;
  margin-left: -2px;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-toc a .mono {
  font-size: 11px;
  color: var(--moss);
}

.page-about .about-toc a:hover,
.page-about .about-toc a:focus-visible {
  color: var(--orange);
  border-left-color: var(--orange);
}

.page-about .about-toc a:hover .mono,
.page-about .about-toc a:focus-visible .mono {
  color: var(--orange);
}

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  padding: 40px 0;
  border-top: var(--about-hair);
}

.page-about .about-chapter:first-child {
  border-top: none;
  padding-top: 8px;
}

.page-about .chapter-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: 20px;
}

.page-about .chapter-num {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--orange);
  flex: none;
}

.page-about .chapter-head h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 3.4vw, 2.15rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 0;
}

.page-about .chapter-lead {
  font-size: clamp(1rem, 1.5vw, 1.08rem);
  line-height: 1.8;
  max-width: 36em;
  margin-bottom: 24px;
}

.page-about .chapter-grid p {
  line-height: 1.85;
  margin-bottom: 16px;
  max-width: 36em;
}

.page-about .chapter-note {
  margin-top: 22px;
  padding: 16px 18px;
  border-left: 4px solid var(--orange);
  background: var(--about-tint);
  font-size: 15px;
  line-height: 1.8;
}

/* ---------- 赛事覆盖面 ---------- */
.page-about .scale-visual {
  margin: 0 0 0;
}

.page-about .scale-visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: var(--about-rule);
}

.page-about .scale-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  margin: -20px 12px 0;
  position: relative;
  border: var(--about-rule);
  background: var(--ink);
}

.page-about .scale-cell {
  background: var(--green);
  color: var(--paper);
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .scale-num {
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  color: var(--neon);
}

.page-about .scale-label {
  font-size: 12px;
  line-height: 1.5;
  color: rgba(245, 238, 223, 0.86);
}

/* ---------- 团队 ---------- */
.page-about .team-layout {
  display: grid;
  gap: 28px;
}

.page-about .team-row {
  display: grid;
  gap: 6px;
  padding: 16px 12px 16px 14px;
  border-left: 4px solid var(--about-tint);
  background: var(--paper-white);
  border-bottom: var(--about-hair);
  transition: border-color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-about .team-row:hover,
.page-about .team-row:focus,
.page-about .team-row:focus-within {
  border-left-color: var(--orange);
  background: var(--paper);
  outline: none;
}

.page-about .team-row:focus-visible,
.page-about .team-row:focus-within {
  outline: 3px solid var(--orange);
  outline-offset: 2px;
}

.page-about .team-tag h3 {
  font-family: var(--font-display);
  font-size: 1.18rem;
  font-weight: 900;
  margin: 2px 0 0;
  letter-spacing: -0.01em;
}

.page-about .team-count {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--moss);
}

.page-about .team-desc p {
  font-size: 15px;
  line-height: 1.78;
}

.page-about .team-duty {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  margin-top: 0;
  font-size: 14px;
  color: var(--moss);
  transition: max-height 0.26s var(--ease), opacity 0.26s var(--ease), margin-top 0.26s var(--ease);
}

.page-about .team-row:hover .team-duty,
.page-about .team-row:focus .team-duty,
.page-about .team-row:focus-within .team-duty {
  max-height: 140px;
  opacity: 1;
  margin-top: 8px;
}

.page-about .team-visual {
  margin: 0;
}

.page-about .team-visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: var(--about-rule);
  box-shadow: var(--shadow-accent);
}

/* ---------- 里程碑 ---------- */
.page-about .about-tabs .tab-list {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  margin-bottom: 18px;
  border-bottom: var(--about-rule);
}

.page-about .about-tabs .tab {
  flex: none;
  min-height: 44px;
  min-width: 72px;
  padding: 10px 18px;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.06em;
  color: var(--ink);
  background: var(--paper-white);
  border: 2px solid var(--ink);
  border-radius: var(--pill);
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .about-tabs .tab:hover {
  background: var(--paper);
}

.page-about .about-tabs .tab[aria-selected="true"] {
  background: var(--green);
  color: var(--neon);
  border-color: var(--green);
  box-shadow: 4px 4px 0 var(--orange);
}

.page-about .about-tabs .tab:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 2px;
}

.page-about .about-panel {
  position: relative;
  padding: 22px 20px 24px;
  background: var(--paper-white);
  border: var(--about-rule);
  border-radius: var(--radius);
}

.page-about .about-panel + .about-panel {
  margin-top: 14px;
}

.page-about .about-panel[hidden],
.page-about .about-panel[aria-hidden="true"] {
  display: none;
}

.page-about .about-panel:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 2px;
}

.page-about .panel-year {
  display: block;
  font-size: clamp(2.2rem, 7vw, 3.4rem);
  font-weight: 700;
  line-height: 1;
  color: var(--neon);
  background: var(--green);
  padding: 6px 14px;
  margin: -24px 0 16px -22px;
  width: fit-content;
  border-radius: var(--radius);
}

.page-about .about-panel h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 900;
  margin-bottom: 10px;
}

.page-about .about-panel p {
  font-size: 15px;
  line-height: 1.82;
  max-width: 38em;
}

.page-about .panel-more {
  margin-top: 12px;
}

.page-about .text-link {
  color: var(--moss);
  text-decoration: none;
  border-bottom: 2px solid var(--orange);
  padding-bottom: 1px;
  font-size: 14px;
  transition: color 0.2s var(--ease);
}

.page-about .text-link:hover,
.page-about .text-link:focus-visible {
  color: var(--orange);
}

/* ---------- 读者与合作 ---------- */
.page-about .community-layout {
  display: grid;
  gap: 24px;
  margin-bottom: 28px;
}

.page-about .community-copy p {
  font-size: 15px;
  line-height: 1.85;
  margin-bottom: 14px;
  max-width: 34em;
}

.page-about .community-visual {
  background: var(--green);
  padding: 18px 16px 14px;
  border: var(--about-rule);
  border-radius: var(--radius);
}

.page-about .coverage-map {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .community-visual .image-caption {
  color: rgba(245, 238, 223, 0.82);
  margin-top: 10px;
}

.page-about .readout {
  padding: 18px;
  border: var(--about-rule);
  background: var(--paper-white);
  margin-bottom: 22px;
}

.page-about .readout-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  font-size: 14px;
  margin-bottom: 10px;
}

.page-about .readout-value {
  color: var(--orange);
  font-size: 18px;
  font-weight: 700;
}

.page-about .readout-bar {
  height: 12px;
  background: var(--about-tint);
  border: 2px solid var(--ink);
  overflow: hidden;
}

.page-about .readout-fill {
  display: block;
  height: 100%;
  background: var(--orange);
  transform-origin: left center;
  animation: about-grow 0.9s var(--ease) both;
}

.page-about .fill-mobile {
  width: 78%;
}

@keyframes about-grow {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

.page-about .community-stats {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  background: var(--ink);
  border: var(--about-rule);
}

.page-about .community-stats li {
  background: var(--paper-white);
  padding: 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-about .community-stats li:first-child {
  background: var(--green);
  color: var(--paper);
}

.page-about .stat-num {
  font-size: clamp(1.3rem, 3.4vw, 1.7rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--orange);
}

.page-about .community-stats li:first-child .stat-num {
  color: var(--neon);
}

.page-about .stat-label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--moss);
}

.page-about .community-stats li:first-child .stat-label {
  color: rgba(245, 238, 223, 0.88);
}

/* ---------- 服务方式 ---------- */
.page-about .service-layout {
  display: grid;
  gap: 14px;
  margin-bottom: 26px;
}

.page-about .service-card {
  padding: 18px 16px;
  border: var(--about-rule);
  border-radius: var(--radius);
  background: var(--paper-white);
}

.page-about .service-card h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 900;
  margin-bottom: 8px;
}

.page-about .service-card p {
  font-size: 14.5px;
  line-height: 1.8;
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-actions .btn {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border-radius: var(--pill);
  text-decoration: none;
  font-size: 15px;
  font-weight: 600;
  border: 2px solid var(--ink);
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease), background-color 0.18s var(--ease), color 0.18s var(--ease);
}

.page-about .about-actions .btn-primary {
  background: var(--green);
  color: var(--neon);
  border-color: var(--green);
  box-shadow: 4px 4px 0 var(--orange);
}

.page-about .about-actions .btn-secondary {
  background: var(--orange);
  color: var(--ink);
  border-color: var(--ink);
  box-shadow: 4px 4px 0 var(--ink);
}

.page-about .about-actions .btn-ghost {
  background: transparent;
  color: var(--ink);
}

.page-about .about-actions .btn:hover,
.page-about .about-actions .btn:focus-visible {
  transform: translate(-2px, -2px);
  outline: 3px solid var(--orange);
  outline-offset: 2px;
}

/* ---------- 延伸 ---------- */
.page-about .about-tail {
  margin-top: 20px;
  padding: 28px 20px;
  background: var(--green);
  color: var(--paper);
  border-radius: var(--radius);
  display: grid;
  gap: 20px;
  clip-path: polygon(0 0, 100% 2.5%, 100% 100%, 0 97.5%);
}

.page-about .about-tail h2 {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  font-weight: 900;
  margin: 8px 0 10px;
  color: var(--paper);
}

.page-about .about-tail p {
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(245, 238, 223, 0.88);
  max-width: 32em;
}

.page-about .about-tail .eyebrow {
  color: var(--neon);
}

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

.page-about .tail-links .text-link {
  color: var(--paper);
  border-bottom-color: var(--neon);
  display: inline-block;
  padding: 4px 0;
  font-size: 14px;
}

.page-about .tail-links .text-link:hover,
.page-about .tail-links .text-link:focus-visible {
  color: var(--neon);
  outline: none;
  border-bottom-color: var(--orange);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .scale-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-inline: 20px;
  }

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

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

  .page-about .service-card:first-child {
    grid-column: 1 / -1;
    background: var(--green);
    color: var(--paper);
  }

  .page-about .service-card:first-child p {
    color: rgba(245, 238, 223, 0.92);
  }

  .page-about .team-row {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 20px;
  }

  .page-about .about-tail {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
    padding: 34px 28px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: 44px;
    padding: 32px 0 56px;
  }

  .page-about .about-hero-visual img {
    transform: translateY(6px);
  }

  .page-about .community-layout {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
    gap: 32px;
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 34px;
    align-items: start;
  }
}

@media (min-width: 1080px) {
  .page-about .about-body {
    grid-template-columns: 190px minmax(0, 1fr);
    gap: 56px;
    padding-top: 48px;
  }

  .page-about .about-toc {
    display: block;
    position: sticky;
    top: 104px;
    align-self: start;
  }

  .page-about .about-chapter {
    padding: 48px 0;
  }

  .page-about .about-shell {
    padding-bottom: 96px;
  }
}

@media (hover: none) {
  .page-about .team-duty {
    max-height: none;
    opacity: 1;
    margin-top: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .readout-fill {
    animation: none;
  }

  .page-about .team-duty,
  .page-about .team-row,
  .page-about .about-actions .btn,
  .page-about .about-tabs .tab {
    transition: none;
  }
}