.page-about {
  --about-rule: 2px solid var(--border-strong);
  --about-hairline: 1px solid rgba(47, 107, 87, 0.6);
  --about-shadow: 8px 8px 0 rgba(0, 245, 160, 0.12);
  --about-shadow-alert: 8px 8px 0 rgba(255, 90, 54, 0.16);
  display: block;
  overflow-x: clip;
}

/* ============ 首屏 ============ */
.page-about .about-hero {
  padding-block: clamp(1.25rem, 3.5vw, 2.25rem) clamp(2.5rem, 6vw, 4.5rem);
}

.page-about .about-hero .breadcrumbs {
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3.5rem);
  align-items: start;
}

.page-about .about-hero-copy h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.95rem, 5.4vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -0.015em;
  margin-block: 0.35em 0.55em;
  color: var(--text-primary);
  text-wrap: balance;
  max-width: 18ch;
}

.page-about .about-hero-copy .lede {
  color: var(--text-secondary);
  font-size: 1.02rem;
  line-height: 1.8;
  max-width: 48ch;
  margin: 0 0 1.25rem;
  padding-left: 0.9rem;
  border-left: 3px solid var(--neon-cyan);
}

.page-about .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-about .about-hero-figure {
  margin: 0;
  border: var(--about-rule);
  background: var(--pitch-dark);
  box-shadow: var(--about-shadow);
  overflow: hidden;
}

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

.page-about .about-hero-figure figcaption {
  font-family: var(--font-data);
  font-size: 0.76rem;
  letter-spacing: 0.03em;
  color: var(--text-secondary);
  padding: 0.7rem 0.95rem;
  border-top: var(--about-hairline);
  background: var(--ink-base);
}

/* ============ 为什么做这块看台 ============ */
.page-about .about-why {
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
  border-top: var(--about-rule);
  background:
    linear-gradient(180deg, rgba(14, 42, 34, 0.85) 0%, rgba(7, 19, 15, 0.2) 100%);
}

.page-about .about-why-grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: start;
}

.page-about .about-why-copy h2,
.page-about .about-team-copy h2,
.page-about .section-head h2 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.55rem, 3.6vw, 2.4rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin-block: 0.32em 0.7em;
  color: var(--text-primary);
  text-wrap: balance;
}

.page-about .about-why-copy p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
  max-width: 60ch;
  margin: 0 0 1em;
}

.page-about .about-why-panel {
  border: var(--about-rule);
  border-left: 6px solid var(--neon-cyan);
  background: var(--ink-base);
  box-shadow: var(--about-shadow);
  padding: clamp(1.15rem, 3vw, 1.65rem);
  display: grid;
  gap: 1.1rem;
}

.page-about .about-why-panel .stat {
  display: grid;
  gap: 0.2rem;
  padding-bottom: 1.05rem;
  border-bottom: var(--about-hairline);
}

.page-about .about-why-panel .stat:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .about-why-panel .stat-value {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.3rem, 5.2vw, 3.3rem);
  line-height: 0.92;
  letter-spacing: -0.025em;
  color: var(--neon-cyan);
  font-variant-numeric: tabular-nums;
}

.page-about .about-why-panel .stat--alert .stat-value {
  color: var(--status-orange);
}

.page-about .stat-unit {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.36em;
  margin-left: 0.18em;
  vertical-align: 0.12em;
  letter-spacing: 0;
}

.page-about .about-why-panel .stat-label {
  font-size: 0.84rem;
  line-height: 1.55;
  color: var(--text-secondary);
}

/* ============ 编辑团队 ============ */
.page-about .about-team {
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
  border-top: var(--about-rule);
}

.page-about .about-team-grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: start;
}

.page-about .about-team-figure {
  margin: 0;
  border: var(--about-rule);
  background: var(--pitch-dark);
  overflow: hidden;
}

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

.page-about .about-team-figure figcaption {
  font-family: var(--font-data);
  font-size: 0.76rem;
  letter-spacing: 0.03em;
  color: var(--text-secondary);
  padding: 0.7rem 0.95rem;
  border-top: var(--about-hairline);
  background: var(--ink-base);
}

.page-about .about-team-copy p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
  max-width: 62ch;
  margin: 0 0 1em;
}

.page-about .shift-list {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  border-top: var(--about-rule);
}

.page-about .shift-list li {
  position: relative;
  padding: 0.95rem 0 0.95rem 1.5rem;
  border-bottom: var(--about-hairline);
}

.page-about .shift-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.45rem;
  width: 9px;
  height: 9px;
  background: var(--neon-cyan);
}

.page-about .shift-list li::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 1.45rem;
  bottom: -0.95rem;
  width: 1px;
  background: var(--border-strong);
}

.page-about .shift-list li:last-child::after {
  display: none;
}

.page-about .shift-time {
  display: block;
  font-family: var(--font-data);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--neon-cyan-soft);
  margin-bottom: 0.25rem;
}

.page-about .shift-list li p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

/* ============ 数据覆盖 ============ */
.page-about .about-coverage {
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
  border-top: var(--about-rule);
  background: var(--pitch-dark);
}

.page-about .about-coverage .section-head {
  max-width: 72ch;
  margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
}

.page-about .about-coverage .section-head .lede {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
  max-width: 66ch;
  margin: 0;
}

.page-about .coverage-layout {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: center;
}

.page-about .coverage-ring {
  position: relative;
  display: grid;
  place-items: center;
  width: min(100%, 240px);
  margin-inline: auto;
}

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

.page-about .coverage-ring svg circle:first-of-type {
  stroke: var(--pitch-mid);
}

.page-about .coverage-ring svg circle:last-of-type {
  stroke: var(--neon-cyan);
}

.page-about .coverage-ring-num {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -78%);
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.4rem, 6vw, 3.4rem);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
}

.page-about .coverage-ring-label {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, 58%);
  font-family: var(--font-data);
  font-size: 0.72rem;
  letter-spacing: 0.09em;
  white-space: nowrap;
  color: var(--text-secondary);
}

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

.page-about .cov-cell {
  position: relative;
  display: grid;
  gap: 0.18rem;
  padding: 0.85rem 0.8rem 0.85rem 1rem;
  background: var(--ink-base);
  transition: background-color 170ms ease;
}

.page-about .cov-cell::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--pitch-mid);
  transition: background-color 170ms ease;
}

.page-about .cov-cell:hover,
.page-about .cov-cell:focus-within {
  background: var(--pitch-dark);
}

.page-about .cov-cell:hover::before,
.page-about .cov-cell:focus-within::before {
  background: var(--neon-cyan);
}

.page-about .cov-cell b {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--text-primary);
  letter-spacing: 0.01em;
}

.page-about .cov-cell small {
  font-family: var(--font-data);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
}

.page-about .coverage-note {
  margin: 1.15rem 0 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--text-secondary);
  max-width: 68ch;
}

/* ============ 版本演进 ============ */
.page-about .about-timeline {
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
  border-top: var(--about-rule);
}

.page-about .about-timeline .section-head {
  margin-bottom: clamp(1.5rem, 3.5vw, 2.25rem);
}

.page-about .about-timeline-band {
  margin: 0 0 clamp(1.75rem, 4vw, 2.75rem);
  border-top: var(--about-rule);
  border-bottom: var(--about-rule);
  overflow: hidden;
  background: var(--pitch-dark);
}

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

.page-about .about-track {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: clamp(1.5rem, 3.5vw, 2.25rem);
}

.page-about .about-track::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: var(--border-strong);
}

.page-about .track-node {
  position: relative;
  padding-left: clamp(1.75rem, 4vw, 2.6rem);
}

.page-about .track-node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 14px;
  height: 14px;
  background: var(--ink-base);
  border: 2px solid var(--neon-cyan);
  transition: background-color 170ms ease, transform 170ms ease;
}

.page-about .track-node:hover::before,
.page-about .track-node:focus-within::before {
  background: var(--neon-cyan);
  transform: scale(1.15);
}

.page-about .track-year {
  display: block;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.85rem, 4.6vw, 2.8rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--neon-cyan);
  font-variant-numeric: tabular-nums;
  margin-bottom: 0.35rem;
}

@supports ((-webkit-text-stroke: 1px currentColor)) {
  .page-about .track-year {
    color: transparent;
    -webkit-text-stroke: 1.5px var(--neon-cyan);
  }
}

.page-about .track-node h3 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.02rem, 2.2vw, 1.28rem);
  line-height: 1.35;
  margin: 0 0 0.4rem;
  color: var(--text-primary);
}

.page-about .track-node p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--text-secondary);
  max-width: 64ch;
}

/* ============ 看台准则 ============ */
.page-about .about-principles {
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
  border-top: var(--about-rule);
  background: var(--pitch-dark);
}

.page-about .about-principles .section-head {
  margin-bottom: clamp(1.75rem, 4vw, 2.5rem);
  max-width: 72ch;
}

.page-about .about-principles .section-head .lede {
  margin: 0;
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
}

.page-about .principle-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--border-strong);
  border: var(--about-rule);
}

.page-about .principle-card {
  background: var(--ink-base);
  padding: clamp(1.2rem, 3vw, 1.75rem);
  display: grid;
  gap: 0.5rem;
  align-content: start;
  transition: background-color 180ms ease;
}

.page-about .principle-card:hover {
  background: var(--pitch-dark);
}

.page-about .principle-index {
  display: inline-block;
  width: fit-content;
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  color: var(--neon-cyan);
  padding-bottom: 0.45rem;
  border-bottom: 2px solid var(--neon-cyan);
  margin-bottom: 0.45rem;
}

.page-about .principle-card h3 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.2rem, 2.6vw, 1.5rem);
  margin: 0;
  color: var(--text-primary);
}

.page-about .principle-card p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.78;
  color: var(--text-secondary);
}

/* ============ 结语联系 ============ */
.page-about .about-cta {
  padding-block: clamp(2.25rem, 5vw, 3.75rem);
  border-top: var(--about-rule);
}

.page-about .about-cta-inner {
  border: var(--about-rule);
  border-right: 6px solid var(--status-orange);
  background: var(--ink-base);
  box-shadow: var(--about-shadow-alert);
  padding: clamp(1.4rem, 3.5vw, 2.25rem);
  display: grid;
  gap: 0.85rem;
  justify-items: start;
}

.page-about .about-cta-inner h2 {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.3rem, 3vw, 1.85rem);
  line-height: 1.25;
  margin: 0;
  color: var(--text-primary);
}

.page-about .about-cta-inner p {
  margin: 0;
  max-width: 64ch;
  font-size: 0.96rem;
  line-height: 1.78;
  color: var(--text-secondary);
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.35rem;
}

/* ============ 响应式 ============ */
@media (min-width: 620px) {
  .page-about .coverage-map {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-about .principle-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-about .about-why-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-about .coverage-layout {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  }
}

@media (min-width: 1024px) {
  .page-about .coverage-map {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  .page-about .about-hero-copy h1 {
    max-width: none;
  }

  .page-about .hero-actions .btn,
  .page-about .about-cta-actions .btn {
    flex: 1 1 auto;
    text-align: center;
  }
}