.page-about {
  --axis-x: 20px;
  --axis-line: var(--line);
}

/* ---------- 首屏 ---------- */

.page-about .story-hero {
  position: relative;
  overflow: hidden;
  padding: 26px 0 30px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .story-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--line-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-soft) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: .55;
  -webkit-mask-image: linear-gradient(205deg, #000 0%, transparent 76%);
  mask-image: linear-gradient(205deg, #000 0%, transparent 76%);
}

.page-about .story-hero-wrap {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 14px;
}

.page-about .breadcrumb {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
}

.page-about .breadcrumb ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--ink-dim);
}

.page-about .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--stone);
}

.page-about .breadcrumb a {
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

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

.page-about h1 {
  margin: 0;
  font-size: clamp(30px, 8vw, 58px);
  line-height: 1.12;
  font-weight: 800;
  letter-spacing: -.015em;
  color: var(--ink);
  max-width: 18ch;
}

.page-about .story-lede {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-about .story-lede strong {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--cyan);
}

.page-about .hero-stats {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .hero-stats li {
  background: var(--scene-800);
  padding: 14px 15px 15px;
  display: grid;
  gap: 5px;
  align-content: start;
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--cyan);
}

.page-about .stat-label {
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: .04em;
  color: var(--ink-dim);
}

/* ---------- 起步与现在 ---------- */

.page-about .origin-band {
  padding: 36px 0 20px;
}

.page-about .section-head {
  margin-bottom: 20px;
}

.page-about .section-kicker {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-about .section-title {
  margin: 0;
  font-size: clamp(22px, 5vw, 34px);
  line-height: 1.28;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-about .origin-grid {
  display: grid;
  gap: 14px;
}

.page-about .origin-panel {
  position: relative;
  padding: 22px 20px 24px;
  background: var(--scene-800);
  border: 1px solid var(--line);
}

.page-about .origin-panel--now {
  background: linear-gradient(155deg, var(--scene-700) 0%, var(--scene-800) 72%);
  border-color: rgba(53, 240, 208, .3);
}

.page-about .origin-panel .tag-cut {
  display: inline-block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
}

.page-about .origin-panel h3 {
  margin: 0 0 8px;
  font-size: 18px;
  line-height: 1.4;
  font-weight: 700;
  color: var(--ink);
}

.page-about .origin-panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink-soft);
}

/* ---------- 时间线骨架 ---------- */

.page-about .story-axis {
  position: relative;
  padding: 4px 0 0;
}

.page-about .story-axis::before {
  content: "";
  position: absolute;
  left: var(--axis-x);
  top: 14px;
  bottom: 14px;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--axis-line) 7%, var(--axis-line) 93%, transparent);
}

.page-about .axis-item {
  position: relative;
  padding: 24px 0 24px 46px;
}

.page-about .axis-item::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 34px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--scene-900);
  border: 2px solid var(--cyan);
  z-index: 2;
  transition: background var(--dur-base) var(--ease), border-color var(--dur-base) var(--ease);
}

.page-about .axis-item:hover::before,
.page-about .axis-item:focus-within::before {
  background: var(--orange);
  border-color: var(--orange);
}

.page-about .axis-card {
  position: relative;
  padding: 22px 19px 24px;
  background: var(--scene-800);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cyan);
  transition: border-color var(--dur-base) var(--ease);
}

.page-about .axis-item:hover .axis-card,
.page-about .axis-item:focus-within .axis-card {
  border-color: rgba(53, 240, 208, .38);
  border-left-color: var(--orange);
}

.page-about .axis-kicker {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--cyan);
}

.page-about .axis-card h2 {
  margin: 0 0 12px;
  font-size: clamp(21px, 5vw, 30px);
  line-height: 1.3;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-about .axis-card > p {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--ink-soft);
}

.page-about .axis-figure {
  margin: 20px 0 0;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--scene-700);
}

.page-about .axis-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(.92);
}

.page-about .axis-figure--strip img {
  aspect-ratio: 14 / 5;
}

/* ---------- 覆盖范围标签矩阵 ---------- */

.page-about .sport-matrix {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .sport-matrix li {
  background: var(--scene-700);
  padding: 14px 14px 15px;
  display: grid;
  gap: 5px;
  align-content: start;
  transition: background var(--dur-fast) var(--ease);
}

.page-about .sport-matrix li:hover {
  background: var(--moss);
}

.page-about .sport-name {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--ink);
}

.page-about .sport-note {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--ink-dim);
}

/* ---------- 内容生产流程 ---------- */

.page-about .flow-steps {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .flow-steps li {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line-soft);
}

.page-about .flow-time {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--orange);
}

.page-about .flow-text {
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* ---------- 团队构成 ---------- */

.page-about .team-bars {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .bar-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 8px;
}

.page-about .bar-name {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--ink);
}

.page-about .bar-num {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-about .bar-track {
  margin: 0;
  height: 8px;
  background: rgba(167, 243, 228, .09);
  overflow: hidden;
}

.page-about .bar-fill {
  display: block;
  height: 100%;
  width: calc(var(--v) / 30 * 100%);
  background: linear-gradient(90deg, var(--moss), var(--cyan));
  transition: width var(--dur-base) var(--ease);
}

.page-about .team-bars li:nth-child(2) .bar-fill {
  background: linear-gradient(90deg, var(--stone), var(--glass));
}

.page-about .team-bars li:nth-child(3) .bar-fill {
  background: linear-gradient(90deg, var(--moss), var(--glass));
}

.page-about .bar-note {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.62;
  color: var(--ink-dim);
}

/* ---------- 版本演进 ---------- */

.page-about .version-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 18px;
}

.page-about .version-jump a {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  text-decoration: none;
  color: var(--ink-soft);
  padding: 7px 13px;
  border: 1px solid var(--line);
  background: rgba(167, 243, 228, .04);
  clip-path: polygon(8px 0, 100% 0, calc(100% - 8px) 100%, 0 100%);
  transition: color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.page-about .version-jump a:hover,
.page-about .version-jump a:focus-visible {
  color: var(--scene-900);
  background: var(--cyan);
  border-color: var(--cyan);
}

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

.page-about .version-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 16px 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .version-row:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-about .version-year {
  font-family: var(--font-mono);
  font-size: clamp(30px, 9vw, 46px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.035em;
  color: var(--stone);
  transition: color var(--dur-base) var(--ease);
}

.page-about .version-row:hover .version-year,
.page-about .version-row:focus-within .version-year {
  color: var(--cyan);
}

.page-about .version-body h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .version-body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink-soft);
}

/* ---------- 合作与认可 ---------- */

.page-about .proof-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: 18px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .proof-cell {
  background: var(--scene-700);
  padding: 18px 16px;
  display: grid;
  gap: 7px;
  align-content: start;
}

.page-about .proof-num {
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.035em;
  color: var(--cyan);
}

.page-about .proof-label {
  font-size: 13px;
  line-height: 1.62;
  color: var(--ink-soft);
}

/* ---------- 结尾去向 ---------- */

.page-about .story-next {
  margin-top: 34px;
  padding: 38px 0 56px;
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(47, 93, 74, .26), rgba(6, 17, 15, 0) 72%);
}

.page-about .next-grid {
  display: grid;
  gap: 22px;
}

.page-about .next-lead p:last-child {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--ink-soft);
  max-width: 42ch;
}

.page-about .next-lead h2 {
  margin: 0 0 12px;
  font-size: clamp(22px, 5vw, 32px);
  line-height: 1.28;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--ink);
}

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

.page-about .next-links a {
  display: grid;
  gap: 6px;
  text-decoration: none;
  padding: 16px 18px;
  background: var(--scene-800);
  border: 1px solid var(--line);
  border-left: 3px solid var(--clay);
  transition: border-color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}

.page-about .next-links a:hover,
.page-about .next-links a:focus-visible {
  border-color: rgba(53, 240, 208, .4);
  border-left-color: var(--cyan);
  transform: translateX(4px);
}

.page-about .link-key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-about .link-val {
  font-size: 15px;
  line-height: 1.62;
  color: var(--ink-soft);
}

/* ---------- 平板与桌面 ---------- */

@media (min-width: 720px) {
  .page-about .story-hero {
    padding: 34px 0 38px;
  }

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

  .page-about .origin-grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }

  .page-about .origin-panel--now {
    transform: translateY(24px);
  }

  .page-about .origin-band {
    padding-bottom: 44px;
  }

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

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

  .page-about .version-row {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 22px;
    align-items: start;
    padding: 20px 0;
  }

  .page-about .version-year {
    font-size: 42px;
  }

  .page-about .axis-card {
    padding: 26px 26px 28px;
  }
}

@media (min-width: 1000px) {
  .page-about .story-hero-wrap {
    gap: 18px;
  }

  .page-about .story-axis::before {
    left: 50%;
  }

  .page-about .axis-item {
    width: calc(50% - 42px);
    padding: 30px 0;
  }

  .page-about .axis-item:nth-child(odd) {
    margin-right: auto;
  }

  .page-about .axis-item:nth-child(even) {
    margin-left: auto;
  }

  .page-about .axis-item:nth-child(odd)::before {
    left: auto;
    right: -47px;
    top: 40px;
  }

  .page-about .axis-item:nth-child(even)::before {
    left: -47px;
    top: 40px;
  }

  .page-about .axis-item:nth-child(even) .axis-card {
    border-left: 1px solid var(--line);
    border-right: 3px solid var(--cyan);
  }

  .page-about .axis-item:nth-child(even):hover .axis-card,
  .page-about .axis-item:nth-child(even):focus-within .axis-card {
    border-right-color: var(--orange);
  }

  .page-about .next-grid {
    grid-template-columns: 4fr 6fr;
    gap: 44px;
    align-items: start;
  }

  .page-about .next-lead {
    position: sticky;
    top: calc(var(--bar-h) + 24px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .bar-fill,
  .page-about .version-year,
  .page-about .next-links a,
  .page-about .axis-card,
  .page-about .axis-item::before {
    transition: none;
  }

  .page-about .origin-panel--now {
    transform: none;
  }
}

.page-about {
  --v: 1rem;
}