.page-about {
  --ab-rail-w: 236px;
}

/* ---------- 页首 ---------- */
.page-about .ab-intro {
  padding-top: clamp(20px, 3vw, 36px);
}

.page-about .ab-head {
  margin-top: 14px;
}

.page-about .ab-head__title {
  margin: 14px 0 0;
  max-width: 16ch;
  font-size: clamp(34px, 6.2vw, 76px);
  line-height: 1.05;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .ab-head__lead {
  margin-top: 18px;
  max-width: 62ch;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.78;
  color: var(--text);
}

.page-about .ab-facts {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line-strong);
  border-radius: var(--r);
  overflow: hidden;
}

.page-about .ab-facts__item {
  background: var(--panel);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .ab-facts__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.6vw, 40px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-about .ab-facts__k {
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

.page-about .ab-hero {
  margin: clamp(28px, 4vw, 48px) 0 0;
}

.page-about .ab-hero img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--line-strong);
  border-radius: var(--r);
}

/* ---------- 双栏骨架 ---------- */
.page-about .ab-layout {
  margin-top: clamp(36px, 5vw, 72px);
  padding-top: clamp(28px, 4vw, 48px);
  padding-bottom: clamp(48px, 7vw, 96px);
  border-top: 1px solid var(--line);
  display: grid;
  gap: clamp(24px, 3vw, 40px);
}

.page-about .ab-rail,
.page-about .ab-flow {
  min-width: 0;
}

/* ---------- 左侧时间轴 / 章节索引 ---------- */
.page-about .ab-rail__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.page-about .ab-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 10px;
  position: relative;
  scrollbar-width: thin;
}

.page-about .ab-rail__item {
  flex: 0 0 auto;
}

.page-about .ab-rail__link {
  display: grid;
  grid-template-columns: 12px 26px auto;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  background: var(--panel);
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  line-height: 1.3;
  white-space: nowrap;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.page-about .ab-rail__dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 1px solid var(--violet);
  background: var(--ink);
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease,
    box-shadow 0.2s ease;
}

.page-about .ab-rail__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-about .ab-rail__link:hover {
  color: var(--text);
  border-color: var(--violet-soft);
}

.page-about .ab-rail__link:hover .ab-rail__dot {
  background: var(--violet);
}

.page-about .ab-rail__link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .ab-rail__link[aria-current] {
  color: var(--white);
  font-weight: 700;
  border-color: var(--cyan);
  background: var(--violet-deep);
}

.page-about .ab-rail__link[aria-current] .ab-rail__dot {
  background: var(--cyan);
  border-color: var(--cyan);
  transform: scale(1.45);
  box-shadow: 0 0 0 4px rgba(43, 224, 214, 0.16);
}

/* ---------- 章节 ---------- */
.page-about .ab-flow > .ab-sec {
  padding-block: clamp(30px, 5vw, 56px);
  border-top: 1px solid var(--line);
}

.page-about .ab-flow > .ab-sec:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .ab-sec__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(44px, 7vw, 88px);
  line-height: 0.82;
  letter-spacing: -0.05em;
  color: transparent;
  -webkit-text-stroke: 1.2px var(--violet);
  margin-bottom: 12px;
}

.page-about .ab-sec__title {
  margin: 0;
  max-width: 22ch;
  font-size: clamp(24px, 3vw, 36px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-about .ab-sec__lead {
  margin: 20px 0 0;
  padding-left: 16px;
  max-width: 56ch;
  border-left: 3px solid var(--cyan);
  font-size: clamp(17px, 1.8vw, 21px);
  line-height: 1.66;
  font-weight: 700;
  color: var(--white);
}

.page-about .ab-sec p.ab-p {
  margin: 16px 0 0;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
}

/* ---------- 分区配置条 ---------- */
.page-about .ab-zones {
  margin-top: clamp(24px, 3vw, 36px);
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line-strong);
  border-radius: var(--r);
  overflow: hidden;
}

.page-about .ab-zone {
  background: var(--panel);
  padding: 18px;
  border-top: 3px solid var(--z, var(--line-strong));
  min-width: 0;
}

.page-about .ab-zone--1 { --z: var(--violet); }
.page-about .ab-zone--2 { --z: var(--cyan); }
.page-about .ab-zone--3 { --z: var(--green); }
.page-about .ab-zone--4 { --z: var(--line-strong); }

.page-about .ab-zone__name {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
}

.page-about .ab-zone__v {
  display: block;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .ab-zone__d {
  display: block;
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 赛季矩阵表 ---------- */
.page-about .ab-tablewrap {
  margin-top: clamp(24px, 3vw, 36px);
  border: 1px solid var(--line-strong);
  border-radius: var(--r);
  background: var(--panel);
  overflow-x: auto;
}

.page-about .ab-table {
  width: 100%;
  min-width: 680px;
  border-collapse: collapse;
}

.page-about .ab-table__cap {
  padding: 14px 18px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
}

.page-about .ab-table thead th {
  padding: 12px 14px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid var(--line-strong);
  white-space: nowrap;
}

.page-about .ab-table tbody th {
  padding: 16px 14px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--white);
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  white-space: nowrap;
}

.page-about .ab-table tbody td {
  padding: 16px 14px;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
  vertical-align: top;
}

.page-about .ab-table tbody tr {
  transition: background 0.18s ease, box-shadow 0.18s ease;
}

.page-about .ab-table tbody tr:hover {
  background: var(--violet-deep);
  box-shadow: inset 3px 0 0 var(--violet);
}

.page-about .ab-table tbody tr:last-child th,
.page-about .ab-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-about .ab-sname {
  display: block;
}

.page-about .ab-sbadge {
  display: inline-block;
  margin-top: 8px;
  padding: 2px 7px;
  border: 1px solid var(--cyan);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-about .ab-sbadge--live {
  border-color: var(--green);
  color: var(--green);
}

/* ---------- 章节配图 ---------- */
.page-about .ab-figure {
  margin: clamp(24px, 3vw, 36px) 0 0;
}

.page-about .ab-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--line-strong);
  border-radius: var(--r);
}

/* ---------- 页内跳转 ---------- */
.page-about .ab-next {
  margin-top: clamp(26px, 4vw, 40px);
  padding-top: clamp(22px, 3vw, 32px);
  border-top: 1px solid var(--line-strong);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 800px) {
  .page-about .ab-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-about .ab-zones {
    grid-template-columns: 1.9fr 1.4fr 1.2fr 1fr;
  }
}

@media (min-width: 1024px) {
  .page-about .ab-layout {
    grid-template-columns: var(--ab-rail-w) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 72px);
    align-items: start;
  }

  .page-about .ab-rail {
    position: sticky;
    top: 128px;
    align-self: start;
  }

  .page-about .ab-rail__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-about .ab-rail__list::before {
    content: "";
    position: absolute;
    left: 5px;
    top: 12px;
    bottom: 12px;
    width: 1px;
    background-image: repeating-linear-gradient(
      to bottom,
      var(--line-strong) 0 5px,
      transparent 5px 11px
    );
  }

  .page-about .ab-rail__item + .ab-rail__item {
    margin-top: 2px;
  }

  .page-about .ab-rail__link {
    grid-template-columns: 14px 26px minmax(0, 1fr);
    padding: 9px 8px 9px 0;
    border-color: transparent;
    background: transparent;
    white-space: normal;
  }

  .page-about .ab-rail__link[aria-current] {
    background: transparent;
    border-color: transparent;
  }
}

@media (min-width: 1280px) {
  .page-about .ab-head__title {
    font-size: 76px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-rail__dot,
  .page-about .ab-rail__link,
  .page-about .ab-table tbody tr {
    transition: none;
  }
}
<<<END>>>