.page-about {
  --ab-muted: #57645D;
  --ab-card: #FFFFFF;
  --ab-shadow: 0 14px 34px rgba(18, 25, 28, 0.10);
  --ab-shadow-deep: 0 22px 48px rgba(18, 25, 28, 0.16);
  --ab-line: rgba(19, 92, 56, 0.14);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about * {
  box-sizing: border-box;
}

.page-about .ab-wrap {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 20px 72px;
}

.page-about .ab-crumb {
  padding: 18px 0 0;
  font-size: 13px;
  color: var(--ab-muted);
}

.page-about .ab-crumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
}

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

.page-about .ab-crumb a {
  color: var(--dirt);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.18s var(--ease);
}

.page-about .ab-crumb a:hover,
.page-about .ab-crumb a:focus-visible {
  border-bottom-color: var(--ember);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  padding: 26px 0 0;
}

.page-about .ab-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--dirt);
}

.page-about .ab-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--dirt);
  box-shadow: 0 0 0 4px rgba(194, 71, 42, 0.16);
}

.page-about .ab-title {
  margin: 0 0 20px;
  font-size: clamp(30px, 7.2vw, 64px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  max-width: 20em;
}

.page-about .ab-title em {
  font-style: normal;
  background: linear-gradient(transparent 62%, rgba(242, 118, 31, 0.42) 62%);
}

.page-about .ab-lede {
  margin: 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.8;
  color: #263134;
}

.page-about .ab-stats {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  margin: 28px 0 30px;
  padding: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .ab-stat {
  background: var(--paper);
  padding: 14px 16px;
}

.page-about .ab-stat b {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(20px, 3.4vw, 30px);
  font-weight: 700;
  line-height: 1.2;
  color: var(--pitch-deep);
}

.page-about .ab-stat span {
  display: block;
  margin-top: 4px;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--ab-muted);
}

/* ---------- 图片容器 ---------- */
.page-about .ab-fig {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--pitch-light);
  border: 1px solid var(--rule);
}

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

.page-about .ab-fig--hero img {
  aspect-ratio: 14 / 9;
  filter: saturate(0.9) contrast(0.96);
}

.page-about .ab-fig--side img,
.page-about .ab-fig--tall img {
  aspect-ratio: 4 / 3;
}

.page-about .ab-fig figcaption {
  padding: 11px 14px;
  background: var(--dirt-deep);
  color: #F3E3DA;
  font-size: 12.5px;
  line-height: 1.6;
  letter-spacing: 0.02em;
}

/* ---------- 章节头 ---------- */
.page-about .ab-sec {
  margin-top: 56px;
}

.page-about .ab-head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 22px;
}

.page-about .ab-idx {
  flex: none;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 14px;
  font-weight: 700;
  line-height: 1;
  padding: 7px 9px;
  border-radius: 4px;
  background: var(--pitch-deep);
  color: #FFFFFF;
}

.page-about .ab-h2 {
  margin: 0;
  font-size: clamp(22px, 4vw, 36px);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.25;
}

.page-about .ab-sub {
  margin: 8px 0 0;
  max-width: 42em;
  font-size: 14.5px;
  color: var(--ab-muted);
}

/* ---------- 斜切色带 ---------- */
.page-about .ab-diag {
  height: 12px;
  margin: 54px -20px -6px;
  background: var(--dirt);
  transform: skewY(-6deg);
  border-radius: 2px;
}

.page-about .ab-diag--pitch {
  background: var(--pitch-deep);
}

/* ---------- 看球场景 ---------- */
.page-about .ab-scenes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-about .ab-scene {
  background: var(--ab-card);
  border: 1px solid var(--rule);
  border-left: 4px solid var(--dirt);
  border-radius: var(--radius);
  padding: 20px 20px 22px;
  box-shadow: var(--ab-shadow);
  transition: transform 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.page-about .ab-scene:nth-child(even) {
  border-left-color: var(--pitch);
}

.page-about .ab-scene:hover,
.page-about .ab-scene:focus-within {
  transform: translateY(-2px);
  box-shadow: var(--ab-shadow-deep);
}

.page-about .ab-scene-tag {
  margin: 0 0 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ember);
}

.page-about .ab-scene h3 {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 800;
  line-height: 1.45;
}

.page-about .ab-scene p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: #2A3438;
}

/* ---------- 六条标准 ---------- */
.page-about .ab-rules {
  list-style: none;
  counter-reset: abrule;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .ab-rule {
  position: relative;
  padding: 18px 18px 18px 60px;
  border-radius: var(--radius);
  border: 1px solid var(--ab-line);
  background: var(--pitch-light);
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease);
}

.page-about .ab-rule:hover {
  border-color: var(--pitch);
  background: #EFF8F0;
}

.page-about .ab-rule::before {
  counter-increment: abrule;
  content: counter(abrule, decimal-leading-zero);
  position: absolute;
  left: 16px;
  top: 17px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
  color: var(--pitch-deep);
  opacity: 0.55;
}

.page-about .ab-rule h3 {
  margin: 0 0 6px;
  font-size: 16.5px;
  font-weight: 800;
  color: var(--pitch-deep);
}

.page-about .ab-rule p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: #263134;
}

/* ---------- 团队技能树 ---------- */
.page-about .ab-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .ab-tree {
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
  position: relative;
}

.page-about .ab-tree::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: var(--rule);
}

.page-about .ab-branch {
  position: relative;
  margin-bottom: 14px;
  padding: 15px 16px 16px;
  background: var(--ab-card);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.page-about .ab-branch:last-child {
  margin-bottom: 0;
}

.page-about .ab-branch::before {
  content: "";
  position: absolute;
  left: -21px;
  top: 28px;
  width: 21px;
  height: 2px;
  background: var(--rule);
}

.page-about .ab-branch::after {
  content: "";
  position: absolute;
  left: -25px;
  top: 24px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--pitch);
  box-shadow: 0 0 0 3px rgba(30, 139, 78, 0.18);
}

.page-about .ab-branch:hover,
.page-about .ab-branch:focus-within {
  transform: translateX(3px);
  border-color: var(--pitch);
  box-shadow: var(--ab-shadow);
}

.page-about .ab-branch:focus-visible {
  outline: 2px solid var(--scoreboard);
  outline-offset: 3px;
}

.page-about .ab-branch-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 10px;
  margin-bottom: 8px;
}

.page-about .ab-branch-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  color: var(--dirt);
}

.page-about .ab-branch-head h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 800;
}

.page-about .ab-branch-tag {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #FFFFFF;
  background: var(--pitch-deep);
  border-radius: 3px;
  padding: 3px 7px;
}

.page-about .ab-branch p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: #2A3438;
}

.page-about .ab-branch-meta {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 12.5px;
  letter-spacing: 0.02em;
  color: var(--ab-muted);
}

/* ---------- 时间轴 ---------- */
.page-about .ab-spark {
  display: block;
  width: 100%;
  height: 56px;
  margin: 0 0 22px;
  color: var(--dirt);
  opacity: 0.6;
}

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

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: repeating-linear-gradient(180deg, var(--rule) 0 6px, transparent 6px 12px);
}

.page-about .ab-node {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: 0 0 26px 30px;
}

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

.page-about .ab-node-dot {
  position: absolute;
  left: 1px;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--dirt);
  box-shadow: 0 0 0 4px rgba(194, 71, 42, 0.14);
}

.page-about .ab-node:focus-visible {
  outline: 2px solid var(--scoreboard);
  outline-offset: 4px;
}

.page-about .ab-node-year {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--pitch-deep);
}

.page-about .ab-node-main h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 800;
}

.page-about .ab-node-main p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: #2A3438;
}

.page-about .ab-node-card {
  padding: 13px 15px;
  border-radius: var(--radius);
  background: var(--glass);
  border: 1px solid var(--rule);
  backdrop-filter: blur(6px);
}

.page-about .ab-node-card p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--ab-muted);
}

/* ---------- 本地运营 ---------- */
.page-about .ab-local {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-about .ab-local-body p {
  margin: 0 0 1.2em;
  font-size: 15.5px;
  line-height: 1.85;
  color: #263134;
  max-width: 38em;
}

.page-about .ab-vnote {
  display: inline-block;
  margin: 0 0 14px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--dirt);
  padding-left: 10px;
  border-left: 3px solid var(--ember);
}

.page-about .ab-local-note {
  padding: 14px 16px;
  border-radius: var(--radius);
  background: var(--pitch-light);
  border: 1px solid var(--ab-line);
  font-size: 14.5px !important;
  color: var(--pitch-deep) !important;
}

/* ---------- 下一页 ---------- */
.page-about .ab-next-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .ab-next-list a {
  display: block;
  padding: 16px 18px;
  border-radius: var(--radius);
  border: 1px solid var(--rule);
  background: var(--ab-card);
  color: var(--ink);
  font-size: 16px;
  font-weight: 800;
  text-decoration: none;
  transition: border-color 0.18s var(--ease), transform 0.18s var(--ease), box-shadow 0.18s var(--ease);
}

.page-about .ab-next-list a span {
  display: block;
  margin-top: 5px;
  font-size: 13.5px;
  font-weight: 400;
  color: var(--ab-muted);
}

.page-about .ab-next-list a:hover,
.page-about .ab-next-list a:focus-visible {
  border-color: var(--ember);
  transform: translateY(-2px);
  box-shadow: var(--ab-shadow);
}

.page-about .ab-next-list a:focus-visible {
  outline: 2px solid var(--scoreboard);
  outline-offset: 2px;
}

/* ---------- 平板 ---------- */
@media (min-width: 760px) {
  .page-about .ab-wrap {
    padding: 0 32px 96px;
  }

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

  .page-about .ab-scenes {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .ab-rules {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-about .ab-next-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .ab-sec {
    margin-top: 72px;
  }

  .page-about .ab-diag {
    margin-left: -32px;
    margin-right: -32px;
  }

  .page-about .ab-team {
    grid-template-columns: 7fr 5fr;
    align-items: start;
    gap: 34px;
  }

  .page-about .ab-local {
    grid-template-columns: 5fr 7fr;
    align-items: start;
    gap: 34px;
  }

  .page-about .ab-node {
    grid-template-columns: 118px minmax(0, 1fr) 300px;
    gap: 0 26px;
    align-items: start;
  }

  .page-about .ab-node-card {
    opacity: 0;
    transform: translateX(-8px);
    transition: opacity 0.18s var(--ease), transform 0.18s var(--ease);
    background: var(--ab-card);
  }

  .page-about .ab-node:hover .ab-node-card,
  .page-about .ab-node:focus-within .ab-node-card {
    opacity: 1;
    transform: translateX(0);
  }

  .page-about .ab-vnote {
    writing-mode: vertical-rl;
    text-orientation: upright;
    font-size: 12px;
    letter-spacing: 0.18em;
    padding: 0 0 0 0;
    padding-top: 10px;
    border-left: 0;
    border-top: 3px solid var(--ember);
    float: left;
    margin: 0 18px 0 0;
  }
}

@media (min-width: 1080px) {
  .page-about .ab-scenes {
    grid-template-columns: repeat(12, 1fr);
  }

  .page-about .ab-scene:nth-child(1) {
    grid-column: span 7;
  }

  .page-about .ab-scene:nth-child(2) {
    grid-column: span 5;
  }

  .page-about .ab-scene:nth-child(3) {
    grid-column: span 5;
  }

  .page-about .ab-scene:nth-child(4) {
    grid-column: span 7;
  }

  .page-about .ab-rules {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .ab-next-list {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-scene,
  .page-about .ab-branch,
  .page-about .ab-next-list a,
  .page-about .ab-node-card {
    transition: none !important;
  }

  .page-about .ab-scene:hover,
  .page-about .ab-branch:hover,
  .page-about .ab-branch:focus-within,
  .page-about .ab-next-list a:hover {
    transform: none;
  }
}
<<<END>>>