.page-about {
  --ab-sec-pad: clamp(56px, 8vw, 116px);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(20px, 3.4vw, 44px) clamp(44px, 6vw, 88px);
  border-bottom: 1px solid var(--line-faint);
  background:
    radial-gradient(92% 84% at 94% 0%, rgba(31, 134, 196, .24), transparent 62%),
    radial-gradient(66% 58% at 0% 104%, rgba(73, 227, 143, .08), transparent 72%),
    linear-gradient(180deg, var(--c-night) 0%, var(--c-night-2) 100%);
}

.page-about .ab-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(32px, 5vw, 56px);
  align-items: center;
}

.page-about .ab-hero__lead {
  display: flex;
  flex-direction: column;
  gap: var(--s2);
  min-width: 0;
}

.page-about .ab-hero__title {
  margin: 0;
  font-size: clamp(34px, 5.4vw, 64px);
  font-weight: 300;
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--c-paper);
}

.page-about .ab-hero__lede {
  margin: 0;
  max-width: 34em;
  color: var(--c-muted);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: var(--s1);
}

/* 数据板 */
.page-about .ab-board {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line-strong);
  background: var(--line-dark);
  box-shadow: var(--shadow-stack);
  min-width: 0;
}

.page-about .ab-board__tag {
  display: block;
  padding: 14px clamp(16px, 2.4vw, 26px);
  background: var(--c-night);
  border-bottom: 1px solid var(--line-dark);
  color: var(--c-lake-light);
}

.page-about .ab-board__grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-dark);
}

.page-about .ab-board__cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(18px, 2.4vw, 30px);
  background: var(--c-night-2);
}

.page-about .ab-board__num {
  font-size: clamp(26px, 3.6vw, 40px);
  font-weight: 700;
  color: var(--c-neon);
  line-height: 1;
  letter-spacing: -0.01em;
}

.page-about .ab-board__label {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--c-muted);
}

@media (min-width: 900px) {
  .page-about .ab-hero__inner {
    grid-template-columns: minmax(0, 58fr) minmax(0, 42fr);
    gap: clamp(36px, 5vw, 76px);
  }
}

/* ---------- 品牌主张 ---------- */
.page-about .ab-stance {
  padding-block: var(--ab-sec-pad);
  border-bottom: 1px solid var(--line-faint);
  background: var(--c-night);
}

.page-about .ab-stance__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s3);
}

.page-about .ab-stance__h {
  margin: 0;
  font-size: clamp(28px, 4.2vw, 50px);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: .01em;
  color: var(--c-paper);
  border-left: 3px solid var(--c-neon);
  padding-left: clamp(14px, 1.8vw, 24px);
}

.page-about .ab-stance__body {
  display: flex;
  flex-direction: column;
  gap: var(--s2);
  max-width: 42em;
}

.page-about .ab-stance__body p {
  margin: 0;
  color: var(--c-muted);
}

@media (min-width: 860px) {
  .page-about .ab-stance__inner {
    grid-template-columns: minmax(0, 34fr) minmax(0, 66fr);
    gap: clamp(28px, 4.4vw, 72px);
    align-items: start;
  }
}

/* ---------- 通用章节头 ---------- */
.page-about .ab-sec-head {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: clamp(28px, 4vw, 52px);
  max-width: 52em;
}

.page-about .ab-sec-head .lede {
  margin: 0;
  color: var(--c-muted);
}

/* ---------- 时间线 ---------- */
.page-about .ab-timeline {
  padding-block: var(--ab-sec-pad);
  background:
    linear-gradient(180deg, var(--c-night-2) 0%, var(--c-night) 42%, var(--c-night) 100%);
  border-bottom: 1px solid var(--line-faint);
}

.page-about .ab-tl__art {
  margin: 0 0 clamp(32px, 5vw, 64px);
  border: 1px solid var(--line-dark);
  background: var(--c-night);
}

.page-about .ab-tl__art img {
  display: block;
  width: 100%;
  height: clamp(150px, 20vw, 260px);
  object-fit: cover;
  opacity: .62;
}

.page-about .ab-tl__art .figure__caption {
  padding: 10px clamp(14px, 2vw, 22px);
  border-top: 1px solid var(--line-faint);
  color: var(--c-muted);
  font-size: 12px;
  letter-spacing: .08em;
}

.page-about .ab-tl {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 0;
  display: grid;
  gap: clamp(26px, 3.6vw, 48px);
}

.page-about .ab-tl::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(180deg,
    var(--c-neon) 0%,
    var(--c-lake) 52%,
    rgba(31, 134, 196, 0) 100%);
}

.page-about .ab-tl__item {
  position: relative;
  padding-left: clamp(30px, 4vw, 46px);
}

.page-about .ab-tl__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-night);
  border: 2px solid var(--c-neon);
  box-shadow: 0 0 14px rgba(73, 227, 143, .45);
}

.page-about .ab-tl__title {
  margin: 6px 0 8px;
  font-size: clamp(18px, 2.2vw, 24px);
  font-weight: 600;
  letter-spacing: .03em;
  color: var(--c-paper);
}

.page-about .ab-tl__body {
  margin: 0;
  max-width: 40em;
  color: var(--c-muted);
}

/* ---------- 团队 ---------- */
.page-about .ab-team {
  padding-block: var(--ab-sec-pad);
  background: var(--c-night);
  border-bottom: 1px solid var(--line-faint);
}

.page-about .ab-team__art {
  margin: 0 0 clamp(30px, 4.4vw, 56px);
  border: 1px solid var(--line-dark);
  overflow: hidden;
}

.page-about .ab-team__art img {
  display: block;
  width: 100%;
  height: clamp(140px, 18vw, 260px);
  object-fit: cover;
  opacity: .72;
}

.page-about .ab-roles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--line-dark);
  border-left: 1px solid var(--line-dark);
}

.page-about .ab-role {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(20px, 2.8vw, 32px);
  border-right: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark);
  background: rgba(27, 38, 53, .34);
}

.page-about .ab-role__name {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--c-paper);
}

.page-about .ab-role__num {
  font-size: clamp(26px, 3vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--c-neon);
}

.page-about .ab-role__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-muted);
}

.page-about .ab-team__note {
  margin: clamp(24px, 3vw, 40px) 0 0;
  padding-left: clamp(14px, 2vw, 22px);
  border-left: 2px solid var(--c-lake);
  max-width: 44em;
  color: var(--c-muted);
}

@media (min-width: 760px) {
  .page-about .ab-roles {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 运营中心（纸面章节） ---------- */
.page-about .ab-hub {
  padding-block: var(--ab-sec-pad);
  background: var(--c-paper);
  color: var(--c-ink);
}

.page-about .ab-hub__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 4.4vw, 64px);
  align-items: center;
}

.page-about .ab-hub__body {
  min-width: 0;
}

.page-about .ab-hub__h {
  margin: 10px 0 var(--s2);
  font-size: clamp(28px, 4vw, 46px);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--c-ink);
}

.page-about .ab-hub__lede {
  margin: 0 0 var(--s3);
  max-width: 34em;
  color: rgba(16, 24, 34, .74);
}

.page-about .ab-hub__facts {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid rgba(16, 24, 34, .16);
}

.page-about .ab-hub__fact {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(16, 24, 34, .16);
}

.page-about .ab-hub__fact dt {
  font-size: 12px;
  letter-spacing: .18em;
  color: rgba(16, 24, 34, .58);
}

.page-about .ab-hub__fact dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-ink);
}

.page-about .ab-hub__art {
  margin: 0;
  border: 1px solid rgba(16, 24, 34, .22);
  background: var(--c-night);
  box-shadow: 12px 12px 0 rgba(16, 24, 34, .1);
}

.page-about .ab-hub__art img {
  display: block;
  width: 100%;
  height: clamp(200px, 34vw, 380px);
  object-fit: cover;
}

.page-about .ab-hub__art .figure__caption {
  padding: 10px 16px;
  border-top: 1px solid rgba(16, 24, 34, .18);
  font-size: 12px;
  letter-spacing: .08em;
  color: rgba(16, 24, 34, .62);
}

@media (min-width: 900px) {
  .page-about .ab-hub__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
}

/* ---------- 版本对照 ---------- */
.page-about .ab-compare-wrap {
  padding-block: var(--ab-sec-pad);
  background: var(--c-night);
  border-bottom: 1px solid var(--line-faint);
}

.page-about .ab-compare .tabs__list {
  position: relative;
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--line-dark);
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-about .ab-compare .tabs__indicator {
  display: none;
}

.page-about .ab-compare .tabs__tab {
  position: relative;
  appearance: none;
  border: 0;
  background: transparent;
  font: inherit;
  font-size: 13px;
  letter-spacing: .16em;
  color: var(--c-muted);
  padding: 12px 20px 14px;
  cursor: pointer;
  transition: color var(--dur) var(--ease);
}

.page-about .ab-compare .tabs__tab::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: -1px;
  height: 2px;
  background: transparent;
  transition: background var(--dur) var(--ease);
}

.page-about .ab-compare .tabs__tab[aria-selected="true"] {
  color: var(--c-paper);
}

.page-about .ab-compare .tabs__tab[aria-selected="true"]::after {
  background: var(--c-neon);
}

.page-about .ab-compare .tabs__tab:hover {
  color: var(--c-lake-light);
}

.page-about .ab-track {
  border: 1px solid var(--line-dark);
  background: rgba(27, 38, 53, .42);
  padding: clamp(22px, 3.2vw, 40px);
}

.page-about .ab-track__count {
  display: inline-block;
  font-size: clamp(30px, 4vw, 46px);
  font-weight: 700;
  line-height: 1;
  color: var(--c-neon);
  margin-bottom: var(--s2);
}

.page-about .ab-track__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .ab-track__steps li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: 1px solid var(--line-strong);
  padding: 9px 15px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--c-paper);
  background: rgba(7, 12, 20, .55);
}

.page-about .ab-track__n {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--c-lake-light);
}

.page-about .ab-track--old .ab-track__n {
  color: var(--c-amber-soft);
}

.page-about .ab-track--new .ab-track__steps li {
  border-color: rgba(73, 227, 143, .5);
}

.page-about .ab-track__note {
  margin: var(--s3) 0 0;
  max-width: 42em;
  color: var(--c-muted);
}

/* ---------- 主客场模块 ---------- */
.page-about .ab-venue {
  padding-block: var(--ab-sec-pad);
  background: var(--c-night-2);
  border-bottom: 1px solid var(--line-faint);
}

.page-about .ab-venue__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 60px);
}

.page-about .ab-venue__body {
  display: flex;
  flex-direction: column;
  gap: var(--s2);
  max-width: 40em;
}

.page-about .ab-venue__body p {
  margin: 0;
  color: var(--c-muted);
}

.page-about .ab-venue__tags {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  align-content: start;
  border-top: 1px solid var(--line-dark);
}

.page-about .ab-venue__tag {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: clamp(18px, 2.4vw, 26px) 0;
  border-bottom: 1px solid var(--line-dark);
}

.page-about .ab-venue__tag p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-muted);
}

.page-about .ab-venue__tag--home {
  border-left: 3px solid var(--c-amber);
  padding-left: clamp(14px, 1.8vw, 22px);
}

.page-about .ab-venue__tag--away {
  border-left: 3px solid var(--c-lake);
  padding-left: clamp(14px, 1.8vw, 22px);
}

.page-about .ab-venue__tag--neutral {
  border-left: 3px solid var(--c-muted);
  padding-left: clamp(14px, 1.8vw, 22px);
}

@media (min-width: 880px) {
  .page-about .ab-venue__grid {
    grid-template-columns: minmax(0, 1.14fr) minmax(0, .86fr);
    align-items: start;
  }
}

/* ---------- 内容取向 ---------- */
.page-about .ab-editorial {
  padding-block: var(--ab-sec-pad);
  background: var(--c-night);
}

.page-about .ab-ed-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 2.6vw, 28px);
}

.page-about .ab-ed {
  border: 1px solid var(--line-dark);
  background: matrix;
  background: rgba(27, 38, 53, .38);
  padding: clamp(22px, 3vw, 34px);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .ab-ed:hover {
  transform: translateY(-4px);
  border-color: var(--line-strong);
}

.page-about .ab-ed .card__head {
  margin-bottom: 10px;
}

.page-about .ab-ed .card__title {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: .05em;
  color: var(--c-paper);
}

.page-about .ab-ed .card__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--c-muted);
}

@media (min-width: 780px) {
  .page-about .ab-ed-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 收尾 ---------- */
.page-about .ab-cta {
  padding-block: clamp(44px, 6vw, 90px);
  background:
    linear-gradient(120deg, rgba(242, 118, 46, .12) 0%, transparent 52%),
    var(--c-night-2);
  border-top: 1px solid var(--line-faint);
}

.page-about .ab-cta__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--s3);
  align-items: center;
}

.page-about .ab-cta__h {
  margin: 0 0 10px;
  font-size: clamp(24px, 3.2vw, 38px);
  font-weight: 300;
  line-height: 1.15;
  color: var(--c-paper);
}

.page-about .ab-cta__p {
  margin: 0;
  max-width: 36em;
  color: var(--c-muted);
}

.page-about .ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 860px) {
  .page-about .ab-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: clamp(28px, 4vw, 64px);
  }
  .page-about .ab-cta__actions {
    justify-content: flex-end;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .ab-ed {
    transition: none;
  }
  .page-about .ab-ed:hover {
    transform: none;
  }
}