.page-about {
  --ab-muted: rgba(244, 247, 245, .74);
  --ab-soft: rgba(244, 247, 245, .68);
  --ab-rail-w: 168px;
  --ab-amber-ink: #A9660F;
  display: block;
  padding-bottom: clamp(40px, 7vw, 84px);
  overflow-x: clip;
  color: var(--white);
  background:
    radial-gradient(900px 520px at 88% -8%, rgba(242, 169, 59, .16), transparent 62%),
    radial-gradient(760px 480px at -10% 34%, rgba(79, 209, 197, .08), transparent 58%),
    linear-gradient(180deg, var(--pitch-deep) 0%, var(--pitch) 46%, var(--pitch-deep) 100%);
}

.page-about img {
  max-width: 100%;
  height: auto;
}

.page-about .ab-shell {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: clamp(16px, 4vw, 32px);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  display: grid;
  gap: clamp(20px, 3.4vw, 36px);
  align-items: center;
  padding-top: clamp(18px, 3.5vw, 40px);
  padding-bottom: clamp(30px, 5vw, 62px);
}

.page-about .ab-hero__title {
  margin: 10px 0 0;
  font-size: clamp(32px, 7.4vw, 68px);
  line-height: 1.05;
  letter-spacing: -.02em;
  transform: skewX(-2deg);
  transform-origin: left bottom;
}

.page-about .ab-hero__lede {
  margin: 18px 0 0;
  max-width: 42ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.82;
  color: var(--ab-muted);
}

.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .ab-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(18px, 4vw, 38px);
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--line);
}

.page-about .ab-fact__k {
  margin: 0;
  font-size: .74rem;
  letter-spacing: .14em;
  color: var(--stand);
}

.page-about .ab-fact__v {
  margin: 6px 0 0;
  font-family: var(--font-num);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--amber);
}

/* ---------- 图片容器 ---------- */
.page-about .ab-shot {
  position: relative;
  margin: 0;
  border-radius: var(--r-xl);
  overflow: hidden;
  border: 1px solid var(--line);
  background: linear-gradient(155deg, var(--pitch-mid), var(--pitch-deep));
  box-shadow: var(--shadow);
}

.page-about .ab-shot__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  filter: saturate(.82) contrast(1.06) brightness(.94);
}

.page-about .ab-shot--hero .ab-shot__img {
  aspect-ratio: 14 / 10;
}

.page-about .ab-shot__cap {
  position: absolute;
  inset: auto 0 0 0;
  padding: 30px 18px 12px;
  font-size: .78rem;
  line-height: 1.55;
  color: rgba(244, 247, 245, .88);
  background: linear-gradient(180deg, rgba(5, 30, 23, 0), rgba(5, 30, 23, .92));
}

/* ---------- 主体双轨 ---------- */
.page-about .ab-body {
  display: grid;
  gap: clamp(20px, 3vw, 28px);
  padding-top: clamp(22px, 4vw, 44px);
  padding-bottom: clamp(22px, 4vw, 44px);
}

.page-about .ab-rail__label {
  margin: 0 0 12px;
  font-size: .72rem;
  letter-spacing: .22em;
  color: var(--stand);
}

.page-about .ab-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 4px 4px 12px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .ab-rail__list li {
  flex: 0 0 auto;
  scroll-snap-align: start;
}

.page-about .ab-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  color: var(--stand);
  font-size: .84rem;
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-about .ab-rail__tick {
  font-family: var(--font-num);
  font-size: .74rem;
  color: rgba(155, 176, 173, .78);
}

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

.page-about .ab-rail__link:hover,
.page-about .ab-rail__link:focus-visible {
  color: var(--amber-light);
  border-color: var(--amber);
  background: rgba(242, 169, 59, .1);
}

.page-about .ab-flow {
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
  min-width: 0;
}

/* ---------- 堆叠面板 ---------- */
.page-about .ab-section {
  position: relative;
  border-radius: var(--r-xl);
  padding: clamp(20px, 3.6vw, 44px);
  background: linear-gradient(180deg, rgba(244, 247, 245, .075), rgba(244, 247, 245, .018));
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.page-about .ab-section::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--amber), rgba(242, 169, 59, 0));
  opacity: .85;
}

.page-about .ab-section--light {
  color: var(--pitch-ink);
  border-color: rgba(11, 59, 46, .14);
  background: linear-gradient(160deg, var(--white), #E1EBE6);
}

.page-about .ab-section--light .ab-section__title {
  color: var(--pitch-ink);
}

.page-about .ab-section--light .ab-section__tick {
  color: var(--ab-amber-ink);
}

.page-about .ab-section--light .ab-section__lead {
  color: #2C5346;
}

.page-about .ab-section--light .ab-section__text {
  color: #3D6357;
}

.page-about .ab-section--region {
  background: linear-gradient(140deg, rgba(242, 169, 59, .13), rgba(11, 59, 46, .45) 60%, rgba(79, 209, 197, .08));
}

.page-about .ab-section__head {
  display: flex;
  gap: 14px;
  align-items: baseline;
  margin-bottom: 16px;
}

.page-about .ab-section__tick {
  flex: 0 0 auto;
  font-family: var(--font-num);
  font-size: .82rem;
  letter-spacing: .1em;
  color: var(--amber);
}

.page-about .ab-section__title {
  margin: 0;
  font-size: clamp(21px, 3.4vw, 32px);
  line-height: 1.26;
  letter-spacing: -.01em;
  font-weight: 700;
}

.page-about .ab-section__lead {
  max-width: 62ch;
  margin: 0;
  font-size: clamp(15px, 1.5vw, 17.5px);
  line-height: 1.76;
  color: var(--ab-muted);
}

.page-about .ab-section__text {
  max-width: 66ch;
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.86;
  color: var(--ab-soft);
}

/* ---------- 赛季时间线 ---------- */
.page-about .ab-timeline {
  display: grid;
  gap: 18px;
  margin: clamp(22px, 3.5vw, 34px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-timeline__item {
  position: relative;
  padding-top: 22px;
  border-top: 2px solid var(--line);
}

.page-about .ab-timeline__item::before {
  content: "";
  position: absolute;
  top: -7px;
  left: 0;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--pitch);
  border: 2px solid var(--amber);
}

.page-about .ab-timeline__season {
  margin: 0;
  font-family: var(--font-num);
  font-size: .8rem;
  letter-spacing: .06em;
  color: var(--amber);
}

.page-about .ab-timeline__title {
  margin: 8px 0 0;
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.4;
}

.page-about .ab-timeline__desc {
  margin: 8px 0 0;
  font-size: .88rem;
  line-height: 1.72;
  color: var(--ab-soft);
}

/* ---------- 档案数字 ---------- */
.page-about .ab-stats {
  display: grid;
  gap: clamp(12px, 2.4vw, 20px);
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  margin-top: clamp(20px, 3vw, 28px);
}

.page-about .ab-stat {
  padding: 18px 16px;
  border-radius: var(--r-lg);
  background: rgba(11, 59, 46, .06);
  border: 1px solid rgba(11, 59, 46, .1);
}

.page-about .ab-stat__v {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 0;
  font-family: var(--font-num);
  font-size: clamp(32px, 5.2vw, 52px);
  line-height: 1;
  font-weight: 700;
  letter-spacing: -.03em;
  color: var(--ab-amber-ink);
  overflow-wrap: anywhere;
}

.page-about .ab-stat__unit {
  font-size: .9rem;
  font-weight: 600;
  letter-spacing: 0;
}

.page-about .ab-stat__k {
  margin: 12px 0 0;
  font-size: .95rem;
  font-weight: 700;
  color: var(--pitch-ink);
}

.page-about .ab-stat__d {
  margin: 8px 0 0;
  font-size: .84rem;
  line-height: 1.68;
  color: #4A6B60;
}

/* ---------- 工序岗位 ---------- */
.page-about .ab-roles {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(196px, 1fr));
  margin-top: clamp(20px, 3vw, 28px);
}

.page-about .ab-role {
  padding: 18px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: rgba(7, 42, 32, .55);
}

.page-about .ab-role__t {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 10px;
  font-size: .98rem;
  font-weight: 700;
}

.page-about .ab-role__n {
  font-family: var(--font-num);
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  letter-spacing: -.02em;
  color: var(--amber);
}

.page-about .ab-role p {
  margin: 0;
  font-size: .88rem;
  line-height: 1.76;
  color: var(--ab-soft);
}

/* ---------- 折叠条目 ---------- */
.page-about .ab-details {
  display: grid;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 28px);
}

.page-about .ab-acc {
  padding: 2px 18px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: rgba(7, 42, 32, .5);
}

.page-about .ab-acc > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 44px;
  padding: 10px 0;
  font-size: .96rem;
  font-weight: 700;
  color: var(--white);
  cursor: pointer;
  list-style: none;
}

.page-about .ab-acc > summary::-webkit-details-marker {
  display: none;
}

.page-about .ab-acc > summary::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-num);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--amber);
  transition: transform .22s var(--ease);
}

.page-about .ab-acc[open] > summary::after {
  transform: rotate(45deg);
}

.page-about .ab-acc:focus-within {
  border-color: var(--screen);
  box-shadow: 0 0 0 2px rgba(79, 209, 197, .35);
}

.page-about .ab-acc p {
  margin: 0 0 16px;
  font-size: .88rem;
  line-height: 1.8;
  color: var(--ab-soft);
}

/* ---------- 看台文化 ---------- */
.page-about .ab-culture {
  display: grid;
  gap: clamp(12px, 2.4vw, 20px);
  grid-template-columns: repeat(auto-fit, minmax(174px, 1fr));
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .ab-culture__item {
  padding: 20px 18px;
  border-radius: var(--r-lg);
  border: 1px solid rgba(79, 209, 197, .26);
  background: linear-gradient(170deg, rgba(79, 209, 197, .13), rgba(79, 209, 197, .02));
}

.page-about .ab-culture__t {
  margin: 0 0 8px;
  font-size: 1.05rem;
  color: var(--screen);
}

.page-about .ab-culture__item p {
  margin: 0;
  font-size: .88rem;
  line-height: 1.78;
  color: var(--ab-soft);
}

.page-about .ab-quote {
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 16px 0 16px 20px;
  border-left: 3px solid var(--amber);
}

.page-about .ab-quote p {
  margin: 0;
  font-size: clamp(15px, 1.8vw, 19px);
  line-height: 1.72;
  color: var(--white);
}

/* ---------- 协作方式 ---------- */
.page-about .ab-ways {
  display: grid;
  gap: clamp(12px, 2.4vw, 20px);
  grid-template-columns: repeat(auto-fit, minmax(214px, 1fr));
  margin-top: clamp(20px, 3vw, 28px);
}

.page-about .ab-way {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 18px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: rgba(7, 42, 32, .5);
}

.page-about .ab-way .badge {
  align-self: flex-start;
}

.page-about .ab-way__t {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.4;
}

.page-about .ab-way p {
  margin: 0;
  font-size: .88rem;
  line-height: 1.74;
  color: var(--ab-soft);
}

.page-about .ab-way__link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: auto;
  font-size: .88rem;
  font-weight: 600;
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-about .ab-way__link:hover,
.page-about .ab-way__link:focus-visible {
  color: var(--amber-light);
  border-bottom-color: var(--amber-light);
}

/* ---------- 地域注脚 ---------- */
.page-about .ab-region {
  display: grid;
  gap: clamp(16px, 3vw, 32px);
  align-items: start;
}

.page-about .ab-region__mark {
  width: 104px;
  height: 104px;
  color: var(--amber);
  opacity: .88;
}

.page-about .ab-region__text p {
  max-width: 62ch;
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.86;
  color: var(--ab-muted);
}

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

/* ---------- 结尾引导 ---------- */
.page-about .ab-cta {
  padding-top: clamp(26px, 4vw, 48px);
}

.page-about .ab-cta__panel {
  display: grid;
  gap: 14px;
  padding: clamp(24px, 4vw, 46px);
  border-radius: var(--r-xl);
  border: 1px solid rgba(242, 169, 59, .34);
  background: linear-gradient(135deg, rgba(242, 169, 59, .18), rgba(242, 169, 59, .04) 55%, rgba(79, 209, 197, .1));
}

.page-about .ab-cta__title {
  margin: 0;
  font-size: clamp(20px, 3vw, 28px);
  line-height: 1.3;
}

.page-about .ab-cta__panel p {
  max-width: 58ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: rgba(244, 247, 245, .78);
}

.page-about .ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

/* ---------- 进入动效 ---------- */
.js .page-about [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
}

.js .page-about [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
}

.js .page-about [data-reveal][data-delay="1"] {
  --ab-delay: 60ms;
}

.js .page-about [data-reveal][data-delay="2"] {
  --ab-delay: 120ms;
}

.js .page-about [data-reveal].is-visible {
  transition-delay: var(--ab-delay, 0ms);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .ab-timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: clamp(12px, 2vw, 22px);
  }

  .page-about .ab-region {
    grid-template-columns: 132px minmax(0, 1fr);
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: clamp(32px, 5vw, 58px);
  }

  .page-about .ab-body {
    grid-template-columns: var(--ab-rail-w) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 58px);
    align-items: start;
  }

  .page-about .ab-rail {
    position: sticky;
    top: 96px;
  }

  .page-about .ab-rail__list {
    display: block;
    padding: 0;
    overflow: visible;
    border-left: 1px solid var(--line);
  }

  .page-about .ab-rail__list li {
    display: block;
  }

  .page-about .ab-rail__link {
    position: relative;
    display: block;
    min-height: 0;
    padding: 12px 0 12px 18px;
    border: 0;
    border-radius: 0;
    white-space: normal;
    line-height: 1.45;
  }

  .page-about .ab-rail__link::before {
    content: "";
    position: absolute;
    left: -5px;
    top: 19px;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--pitch);
    border: 2px solid var(--line-strong);
    transition: background .2s var(--ease), border-color .2s var(--ease), transform .2s var(--ease);
  }

  .page-about .ab-rail__link:hover::before,
  .page-about .ab-rail__link:focus-visible::before {
    background: var(--amber);
    border-color: var(--amber);
    transform: scale(1.15);
  }

  .page-about .ab-rail__tick {
    display: block;
    margin-bottom: 4px;
  }
}

@media (max-width: 560px) {
  .page-about .ab-hero__title {
    transform: none;
  }

  .page-about .ab-shot__cap {
    position: static;
    padding: 12px 16px;
    background: none;
    color: rgba(244, 247, 245, .72);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: .001ms !important;
    animation-duration: .001ms !important;
  }

  .js .page-about [data-reveal] {
    opacity: 1;
    transform: none;
  }
}