.page-about {
  --ab-edge: rgba(41, 214, 232, 0.18);
  --ab-panel: rgba(11, 18, 38, 0.72);
  padding-bottom: 24px;
}

/* 面包屑 */
.page-about .ab-crumb {
  padding: 18px 0 0;
}
.page-about .ab-crumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--fog);
}
.page-about .ab-crumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(148, 163, 184, 0.5);
}
.page-about .ab-crumb a {
  color: var(--cyan);
  text-decoration: none;
}
.page-about .ab-crumb a:hover {
  text-decoration: underline;
}

/* 首屏 */
.page-about .ab-hero {
  padding-top: 26px;
}
.page-about .ab-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}
.page-about .ab-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-narrow);
  font-size: clamp(30px, 8.6vw, 60px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--paper);
}
.page-about .ab-hero__lede {
  max-width: 62ch;
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(230, 237, 247, 0.82);
}
.page-about .ab-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .ab-stats .stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 14px;
  border: 1px solid var(--ab-edge);
  border-radius: var(--r-md);
  background: linear-gradient(150deg, rgba(41, 214, 232, 0.08), rgba(11, 18, 38, 0.62) 62%);
}
.page-about .ab-stats .stat-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(22px, 6vw, 32px);
  line-height: 1;
  color: var(--cyan);
}
.page-about .ab-stats .stat-key {
  font-size: 12px;
  letter-spacing: 0.08em;
  line-height: 1.5;
  color: var(--fog);
}

/* 章节索引 */
.page-about .ab-index {
  margin-top: 42px;
  border-top: 1px solid var(--ab-edge);
  border-bottom: 1px solid var(--ab-edge);
  background: linear-gradient(90deg, rgba(41, 214, 232, 0.07), rgba(124, 92, 255, 0.05) 55%, rgba(255, 106, 31, 0.07));
}
.page-about .ab-index__row {
  display: flex;
  gap: 8px;
  padding-top: 12px;
  padding-bottom: 12px;
  overflow-x: auto;
  scrollbar-width: none;
}
.page-about .ab-index__row::-webkit-scrollbar {
  display: none;
}
.page-about .ab-index__row a {
  flex: 0 0 auto;
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--fog);
  text-decoration: none;
  white-space: nowrap;
}
.page-about .ab-index__row a:hover,
.page-about .ab-index__row a:focus-visible {
  color: var(--lime);
  border-color: rgba(168, 230, 58, 0.4);
  background: rgba(168, 230, 58, 0.07);
}

/* 通用文本块 */
.page-about .ab-narrow {
  max-width: 68ch;
  margin-inline: auto;
}
.page-about .h-sec {
  margin: 10px 0 0;
  font-family: var(--font-narrow);
  font-size: clamp(23px, 5.6vw, 38px);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--paper);
}
.page-about .prose p {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(230, 237, 247, 0.82);
}

.page-about .ab-head {
  max-width: 62ch;
}
.page-about .ab-head__note {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--fog);
}

/* 发展历程 */
.page-about .ab-history {
  position: relative;
  margin-top: 48px;
  padding-block: 56px 64px;
  border-top: 1px solid var(--ab-edge);
  border-bottom: 1px solid var(--ab-edge);
  background: var(--hold);
  overflow: hidden;
}
.page-about .ab-history__bg {
  position: absolute;
  inset: 0;
  margin: 0;
  z-index: 0;
}
.page-about .ab-history__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 40%;
  opacity: 0.3;
}
.page-about .ab-history__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5, 10, 24, 0.88), rgba(5, 10, 24, 0.74) 44%, var(--ink) 100%);
}
.page-about .ab-history .shell {
  position: relative;
  z-index: 1;
}
.page-about .ab-history .ab-head__note {
  color: rgba(148, 163, 184, 0.92);
}

.page-about .ab-tl {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .ab-tl__item {
  position: relative;
  margin-left: 7px;
  padding: 18px 18px 18px 24px;
  border: 1px solid var(--ab-edge);
  border-left: 2px solid rgba(41, 214, 232, 0.55);
  border-radius: var(--r-md);
  background: linear-gradient(180deg, rgba(24, 38, 70, 0.55), rgba(11, 18, 38, 0.68));
  backdrop-filter: blur(6px);
  transition: transform 180ms ease, border-left-color 180ms ease, box-shadow 180ms ease;
}
.page-about .ab-tl__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 27px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(41, 214, 232, 0.16);
}
.page-about .ab-tl__item:hover,
.page-about .ab-tl__item:focus-within {
  transform: translateX(4px);
  border-left-color: var(--lime);
  box-shadow: 0 20px 38px -26px rgba(41, 214, 232, 0.8);
}
.page-about .ab-tl__item:hover::before,
.page-about .ab-tl__item:focus-within::before {
  background: var(--lime);
  box-shadow: 0 0 0 5px rgba(168, 230, 58, 0.18);
}
.page-about .ab-tl__ver {
  display: inline-block;
  padding: 3px 11px;
  border: 1px solid rgba(255, 106, 31, 0.42);
  border-radius: 999px;
  background: rgba(255, 106, 31, 0.1);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--orange);
}
.page-about .ab-tl__title {
  margin: 10px 0 0;
  font-size: 17px;
  line-height: 1.5;
  font-weight: 700;
  color: var(--paper);
}
.page-about .ab-tl__body p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(230, 237, 247, 0.76);
}

/* 团队 */
.page-about .ab-team {
  margin-top: 48px;
}
.page-about .ab-team__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  margin-top: 28px;
}
.page-about .ab-team__figure {
  margin: 0;
  border: 1px solid var(--ab-edge);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--ab-panel);
}
.page-about .ab-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}
.page-about .ab-team__figure figcaption {
  padding: 12px 16px 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--fog);
  border-top: 1px solid var(--ab-edge);
}

.page-about .ab-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .ab-roles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 8px;
  margin-top: 18px;
}
.page-about .ab-role {
  padding: 18px 16px;
  border: 1px solid var(--ab-edge);
  border-radius: var(--r-md);
  background: linear-gradient(180deg, rgba(24, 38, 70, 0.52), rgba(11, 18, 38, 0.6));
}
.page-about .ab-role__n {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 30px;
  line-height: 1;
  color: var(--lime);
}
.page-about .ab-role__name {
  margin: 12px 0 0;
  font-size: 17px;
  line-height: 1.4;
  color: var(--paper);
}
.page-about .ab-role p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(230, 237, 247, 0.74);
}

/* 赛季节奏 */
.page-about .ab-season {
  margin-top: 48px;
}
.page-about .ab-head--split {
  max-width: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}
.page-about .ab-phases {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .ab-phase {
  padding: 20px 18px;
  border: 1px solid var(--ab-edge);
  border-top: 2px solid rgba(41, 214, 232, 0.55);
  border-radius: var(--r-md);
  background: var(--ab-panel);
}
.page-about .ab-phase:nth-child(2) {
  border-top-color: rgba(124, 92, 255, 0.65);
}
.page-about .ab-phase:nth-child(3) {
  border-top-color: rgba(255, 106, 31, 0.65);
}
.page-about .ab-phase__k {
  color: var(--cyan);
}
.page-about .ab-phase h3 {
  margin: 12px 0 0;
  font-size: 18px;
  line-height: 1.45;
  color: var(--paper);
}
.page-about .ab-phase ul {
  margin: 12px 0 0;
  padding-left: 18px;
}
.page-about .ab-phase li {
  margin-top: 7px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(230, 237, 247, 0.75);
}
.page-about .ab-phase li::marker {
  color: var(--cyan);
}

.page-about .ab-season__fig {
  margin: 28px 0 0;
  border: 1px solid var(--ab-edge);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--hold);
}
.page-about .ab-season__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.page-about .ab-season__fig figcaption {
  padding: 12px 16px 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--fog);
  border-top: 1px solid var(--ab-edge);
}

/* 地域与服务范围 */
.page-about .ab-region {
  margin-top: 48px;
}
.page-about .ab-region__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}
.page-about .ab-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .ab-facts li {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 14px;
  border: 1px solid var(--ab-edge);
  border-radius: var(--r-md);
  background: linear-gradient(140deg, rgba(41, 214, 232, 0.09), rgba(11, 18, 38, 0.62) 70%);
}
.page-about .ab-fact__n {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(20px, 5.4vw, 28px);
  line-height: 1;
  color: var(--orange);
}
.page-about .ab-fact__k {
  font-size: 13px;
  line-height: 1.65;
  color: rgba(230, 237, 247, 0.78);
}

/* 下一步入口 */
.page-about .ab-next {
  margin-top: 56px;
  border-top: 1px solid var(--ab-edge);
  padding-top: 40px;
}
.page-about .ab-next__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
}
.page-about .ab-next__note {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--fog);
}
.page-about .ab-next__links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .ab-next__links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 48px;
  padding: 14px 16px;
  border: 1px solid var(--ab-edge);
  border-radius: var(--r-md);
  background: rgba(11, 18, 38, 0.62);
  color: var(--paper);
  font-size: 15px;
  text-decoration: none;
  transition: border-color 180ms ease, color 180ms ease, background 180ms ease;
}
.page-about .ab-next__links a::after {
  content: "→";
  font-family: var(--font-mono);
  color: var(--cyan);
}
.page-about .ab-next__links a:hover,
.page-about .ab-next__links a:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
  background: rgba(41, 214, 232, 0.08);
}

/* 响应式 */
@media (min-width: 720px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
    gap: 40px;
  }
  .page-about .ab-tl {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }
  .page-about .ab-tl__item:last-child {
    grid-column: 1 / -1;
  }
  .page-about .ab-team__layout {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    align-items: start;
    gap: 28px;
  }
  .page-about .ab-head--split {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: end;
    gap: 32px;
  }
  .page-about .ab-head--split .ab-head__note {
    margin-top: 0;
  }
  .page-about .ab-phases {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
  }
  .page-about .ab-region__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
    gap: 40px;
  }
  .page-about .ab-next__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    align-items: start;
    gap: 36px;
  }
}

@media (min-width: 1024px) {
  .page-about .ab-hero {
    padding-top: 36px;
  }
  .page-about .ab-index {
    margin-top: 54px;
  }
  .page-about .ab-tl__item {
    padding: 22px 22px 22px 26px;
  }
  .page-about .ab-role {
    padding: 22px 20px;
  }
  .page-about .ab-facts li {
    padding: 22px 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-tl__item,
  .page-about .ab-next__links a {
    transition: none;
  }
  .page-about .ab-tl__item:hover,
  .page-about .ab-tl__item:focus-within {
    transform: none;
  }
}