.page-about {
  --about-quiet: #0E2721;
  --about-cyan-line: rgba(47, 230, 200, .28);
  display: block;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: 28px;
  padding-bottom: 40px;
}

.page-about .hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-about .hero-copy h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 30px;
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--white);
  margin: 10px 0 18px;
}

.page-about .hero-lead {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.78;
  color: #D5E2DD;
  max-width: 34em;
  margin: 0 0 26px;
}

.page-about .hero-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  margin: 0;
  border: var(--edge) solid var(--line);
  background: var(--line);
}

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

.page-about .hero-fact dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted);
  margin-bottom: 6px;
}

.page-about .hero-fact dd {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 22px;
  letter-spacing: -0.01em;
  color: var(--cyan);
}

/* 侧边目录 */
.page-about .hero-side {
  border: var(--edge) solid var(--line);
  background: var(--about-quiet);
  box-shadow: var(--shadow);
  padding: 18px 18px 20px;
}

.page-about .side-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
  margin: 0 0 12px;
  text-transform: uppercase;
}

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

.page-about .side-list li + li {
  border-top: 1px solid var(--line);
}

.page-about .side-list a {
  display: block;
  min-height: 44px;
  line-height: 44px;
  padding: 0 4px;
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--cyan-soft);
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: border-color 140ms ease, color 140ms ease, padding-left 140ms ease;
}

.page-about .side-list a:hover,
.page-about .side-list a:focus-visible {
  color: var(--cyan);
  border-left-color: var(--cyan);
  padding-left: 12px;
  outline: none;
}

.page-about .side-list a:focus-visible {
  box-shadow: 0 0 0 2px var(--cyan);
}

.page-about .side-note {
  margin: 16px 0 0;
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.06em;
}

/* ---------- 团队章节 ---------- */
.page-about .team-grid {
  align-items: start;
}

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

.page-about .team-chart {
  margin-top: 44px;
  padding: 26px 20px 28px;
  border: var(--edge) solid var(--line);
  background: var(--about-quiet);
}

.page-about .chart-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  color: var(--white);
  margin: 8px 0 8px;
}

.page-about .chart-desc {
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  margin: 0 0 14px;
}

.page-about .bar-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .bar-item {
  display: grid;
  grid-template-columns: 76px 1fr 54px;
  align-items: center;
  gap: 10px;
}

.page-about .bar-name {
  font-size: 13px;
  color: var(--white);
  letter-spacing: 0.02em;
}

.page-about .bar-track {
  display: block;
  height: 14px;
  background: #0A1A16;
  border: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}

.page-about .bar-fill {
  display: block;
  height: 100%;
  background: var(--cyan);
}

.page-about .bar-item--editor .bar-fill { width: 100%; }
.page-about .bar-item--content .bar-fill { width: 50%; }
.page-about .bar-item--eng .bar-fill { width: 42%; }
.page-about .bar-item--cs .bar-fill { width: 25%; }
.page-about .bar-item--ops .bar-fill { width: 17%; }

.page-about .bar-item--content .bar-fill { background: var(--cyan-soft); }
.page-about .bar-item--eng .bar-fill { background: var(--amber); }
.page-about .bar-item--cs .bar-fill { background: var(--red); }
.page-about .bar-item--ops .bar-fill { background: var(--muted); }

.page-about .bar-value {
  font-size: 12px;
  color: var(--muted);
  text-align: right;
}

/* ---------- 记录流程 ---------- */
.page-about .how-head {
  max-width: 40em;
  margin-bottom: 26px;
}

.page-about .how-lead {
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
  margin: 12px 0 0;
}

.page-about .flow-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  background: var(--line);
  border: var(--edge) solid var(--line);
}

.page-about .flow-step {
  background: var(--about-quiet);
  display: grid;
  grid-template-columns: 62px 1fr;
  gap: 12px;
  padding: 18px 16px;
  position: relative;
  transition: background 180ms ease;
}

.page-about .flow-step:hover {
  background: #112B25;
}

.page-about .flow-step::before {
  content: "";
  position: absolute;
  left: 78px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--about-cyan-line);
}

.page-about .flow-num {
  font-size: 22px;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: 0.02em;
  padding-left: 2px;
}

.page-about .flow-body {
  padding-left: 20px;
}

.page-about .flow-body h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--white);
  margin: 2px 0 8px;
}

.page-about .flow-body p {
  font-size: 14px;
  line-height: 1.75;
  color: #B9CFC8;
  margin: 0;
}

/* ---------- 赛事覆盖 ---------- */
.page-about .coverage-lead {
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
  max-width: 36em;
  margin: 12px 0 26px;
}

.page-about .coverage-tabs {
  border: var(--edge) solid var(--line);
  background: var(--about-quiet);
}

.page-about .coverage-tabs .tabs-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border-bottom: var(--edge) solid var(--line);
  background: #0A1A16;
}

.page-about .coverage-tabs .tabs-tab {
  appearance: none;
  min-height: 48px;
  padding: 0 18px;
  background: transparent;
  border: none;
  border-right: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--font-body);
  font-size: 14px;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: color 140ms ease, background 140ms ease;
}

.page-about .coverage-tabs .tabs-tab:hover {
  color: var(--cyan-soft);
}

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

.page-about .coverage-tabs .tabs-tab[aria-selected="true"] {
  color: var(--ink);
  background: var(--cyan);
  font-weight: 800;
}

.page-about .coverage-tabs .tabs-panel {
  padding: 26px 20px 30px;
}

.page-about .coverage-tabs .tabs-panel[hidden] {
  display: none;
}

.page-about .coverage-tabs .tabs-panel:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -4px;
}

.page-about .coverage-panel {
  display: grid;
  gap: 20px;
}

.page-about .coverage-num {
  display: flex;
  align-items: baseline;
  gap: 12px;
  border-left: 3px solid var(--cyan);
  padding-left: 14px;
}

.page-about .big-num {
  font-family: var(--font-mono);
  font-size: 54px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.page-about .big-unit {
  font-size: 14px;
  color: var(--muted);
  letter-spacing: 0.06em;
}

/* ---------- 时间线 ---------- */
.page-about .timeline-lead {
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
  max-width: 36em;
  margin: 12px 0 30px;
}

.page-about .timeline {
  list-style: none;
  margin: 0 0 12px;
  padding: 0 0 0 34px;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 10px;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--cyan) 62%, var(--line) 62%, var(--line) 100%);
}

.page-about .tl-item {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 0 0 30px;
}

.page-about .tl-marker {
  position: absolute;
  left: -34px;
  top: 4px;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
}

.page-about .tl-dot {
  width: 12px;
  height: 12px;
  background: var(--cyan);
  border: 2px solid var(--ink);
  box-shadow: 0 0 0 2px var(--cyan);
}

.page-about .tl-year {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--cyan-soft);
}

.page-about .tl-card {
  border: var(--edge) solid var(--line);
  border-left: 3px solid var(--cyan);
  background: var(--about-quiet);
  padding: 16px 16px 18px;
  transition: transform 180ms ease, border-color 180ms ease;
}

.page-about .tl-card:hover {
  transform: translateX(4px);
  border-left-color: var(--amber);
}

.page-about .tl-card h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  color: var(--white);
  margin: 0 0 8px;
}

.page-about .tl-card p {
  font-size: 14px;
  line-height: 1.78;
  color: #B9CFC8;
  margin: 0;
  max-width: 34em;
}

.page-about .timeline-figure {
  margin: 20px 0 0;
}

/* ---------- 为什么常来 ---------- */
.page-about .why-grid {
  margin-top: 8px;
}

.page-about .why-card {
  height: 100%;
  border: var(--edge) solid var(--line);
  background: #3A1119;
  padding: 20px 18px 22px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: background 180ms ease, transform 180ms ease;
}

.page-about .why-card:hover {
  background: #521823;
  transform: translateY(-3px);
}

.page-about .why-num {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan-soft);
}

.page-about .why-card h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  color: var(--white);
  margin: 0;
}

.page-about .why-card p {
  font-size: 14px;
  line-height: 1.78;
  color: #E8D6D9;
  margin: 0;
}

.page-about .why-cta {
  margin-top: 34px;
  padding: 24px 20px 26px;
  border: var(--edge) solid var(--line);
  background: var(--about-quiet);
  box-shadow: var(--shadow);
  display: grid;
  gap: 20px;
}

.page-about .why-cta-copy h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  color: var(--white);
  margin: 0 0 10px;
}

.page-about .why-cta-copy p {
  font-size: 14px;
  line-height: 1.78;
  color: #B9CFC8;
  margin: 0;
  max-width: 40em;
}

.page-about .why-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .why-cta-actions .btn {
  flex: 1 1 auto;
  justify-content: center;
  text-align: center;
}

/* ---------- 响应式 ---------- */
@media (min-width: 768px) {
  .page-about .hero-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .hero-copy h1 {
    font-size: 36px;
  }

  .page-about .coverage-panel {
    grid-template-columns: minmax(0, 240px) minmax(0, 1fr);
    align-items: start;
    gap: 28px;
  }

  .page-about .coverage-num {
    flex-direction: column;
    gap: 10px;
    border-left: 3px solid var(--cyan);
  }

  .page-about .tl-item {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
  }

  .page-about .tl-year {
    text-align: right;
    padding-right: 16px;
    position: relative;
  }

  .page-about .why-cta {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-about .why-cta-actions {
    justify-content: flex-end;
  }

  .page-about .why-cta-actions .btn {
    flex: 0 0 auto;
  }
}

@media (min-width: 1024px) {
  .page-about .about-hero {
    padding-top: 44px;
    padding-bottom: 56px;
  }

  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 40px;
    align-items: start;
  }

  .page-about .hero-copy h1 {
    font-size: 40px;
    line-height: 1.16;
  }

  .page-about .hero-lead {
    font-size: 17px;
  }

  .page-about .hero-side {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }

  .page-about .bar-item {
    grid-template-columns: 96px 1fr 64px;
    gap: 14px;
  }

  .page-about .flow-step {
    grid-template-columns: 82px 1fr;
    padding: 22px 22px;
  }

  .page-about .flow-step::before {
    left: 104px;
  }

  .page-about .flow-body {
    padding-left: 24px;
  }

  .page-about .timeline {
    padding-left: 46px;
  }

  .page-about .timeline::before {
    left: 14px;
  }

  .page-about .tl-item {
    grid-template-columns: 140px minmax(0, 1fr);
  }

  .page-about .tl-marker {
    left: -46px;
    top: 2px;
  }

  .page-about .tl-card {
    padding: 20px 22px 22px;
  }

  .page-about .why-card {
    padding: 24px 22px 26px;
  }

  .page-about .why-cta {
    padding: 30px 28px 32px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .hero-fact,
  .page-about .flow-step,
  .page-about .tl-card,
  .page-about .why-card,
  .page-about .side-list a {
    transition: none;
  }

  .page-about .tl-card:hover,
  .page-about .why-card:hover {
    transform: none;
  }
}
<<<END>>>