/* ===== 品牌价值页 · 页面作用域 ===== */
.page-about {
  --ab-rule: rgba(242, 243, 245, .14);
  --ab-rule-strong: rgba(242, 243, 245, .30);
  --ab-track: 96px;
}

/* 面包屑 */
.page-about .ab-crumbs {
  padding-top: clamp(18px, 3vw, 30px);
}
.page-about .crumbs {
  font-family: var(--font-data);
  font-size: .78rem;
  letter-spacing: .06em;
  color: var(--mist);
}
.page-about .crumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .3s var(--ease), border-color .3s var(--ease);
}
.page-about .crumbs a:hover,
.page-about .crumbs a:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}
.page-about .crumbs__sep {
  margin: 0 .5em;
  color: rgba(242, 243, 245, .28);
}
.page-about .crumbs__current {
  color: var(--white);
}

/* ===== 首屏 ===== */
.page-about .ab-hero {
  position: relative;
  padding: clamp(28px, 5vw, 56px) 0 clamp(46px, 8vw, 104px);
  overflow: hidden;
}
.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--red) 22%, var(--red) 78%, transparent);
}
.page-about .ab-hero__grid {
  display: grid;
  gap: clamp(28px, 5vw, 48px);
  align-items: end;
}
.page-about .ab-hero__copy .eyebrow {
  display: inline-block;
  margin-bottom: 1.1em;
  color: var(--lime);
}
.page-about .ab-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.2rem, 7.4vw, 4.6rem);
  line-height: .98;
  letter-spacing: -.015em;
  color: var(--white);
  margin: 0 0 .7em;
  max-width: 15em;
}
.page-about .ab-hero h1::after {
  content: "";
  display: block;
  width: clamp(64px, 14vw, 148px);
  height: 6px;
  margin-top: .38em;
  background: var(--red);
}
.page-about .ab-hero__lede {
  max-width: 34em;
  color: var(--body-text);
  font-size: clamp(1rem, 1.6vw, 1.1rem);
  line-height: 1.75;
  margin: 0 0 1.8em;
}
.page-about .ab-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: clamp(28px, 4vw, 44px);
}
.page-about .ab-hero__facts {
  display: grid;
  gap: 0;
  margin: 0;
  border-top: 1px solid var(--ab-rule);
}
.page-about .ab-hero__facts > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--ab-rule);
}
.page-about .ab-hero__facts dt {
  font-family: var(--font-data);
  font-size: .78rem;
  letter-spacing: .08em;
  color: var(--mist);
  white-space: nowrap;
}
.page-about .ab-hero__facts dd {
  margin: 0;
  font-family: var(--font-data);
  font-size: .92rem;
  color: var(--lime);
  text-align: right;
}

/* 首屏配图 */
.page-about .ab-hero__fig {
  position: relative;
  margin: 0;
  padding: 10px;
  border: 1px solid var(--ab-rule-strong);
}
.page-about .ab-hero__fig::before,
.page-about .ab-hero__fig::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  border: 2px solid var(--red);
}
.page-about .ab-hero__fig::before {
  top: -2px;
  left: -2px;
  border-right: 0;
  border-bottom: 0;
}
.page-about .ab-hero__fig::after {
  bottom: -2px;
  right: -2px;
  border-left: 0;
  border-top: 0;
}
.page-about .ab-hero__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  filter: saturate(.9) contrast(1.06);
}
.page-about .ab-hero__fig .media__caption {
  display: block;
  padding: 12px 2px 2px;
  font-size: .8rem;
  line-height: 1.6;
  color: var(--mist);
  border-top: 1px solid var(--ab-rule);
  margin-top: 10px;
}

/* ===== 时间轴骨架 ===== */
.page-about .ab-spine {
  position: relative;
  background:
    radial-gradient(880px 520px at 88% 4%, rgba(200, 16, 46, .16), transparent 68%),
    radial-gradient(720px 480px at -6% 46%, rgba(43, 231, 255, .07), transparent 70%),
    linear-gradient(180deg, rgba(20, 23, 29, .7), rgba(11, 11, 13, 0) 30%);
  padding: clamp(20px, 4vw, 44px) 0 clamp(40px, 7vw, 88px);
}

.page-about .ab-node {
  padding: clamp(38px, 7vw, 84px) 0;
  border-top: 1px solid var(--ab-rule);
}
.page-about .ab-node:first-child {
  border-top: 0;
}
.page-about .ab-node__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
.page-about .ab-node__mark {
  display: none;
}
.page-about .ab-node__body h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.55rem, 4.4vw, 2.7rem);
  line-height: 1.08;
  letter-spacing: -.01em;
  color: var(--white);
  margin: 0 0 1em;
  max-width: 20em;
}

/* ===== 01 三层结构 ===== */
.page-about .ab-node__split {
  display: grid;
  gap: 28px;
}
.page-about .ab-layers {
  display: grid;
  gap: 14px;
}
.page-about .ab-layer {
  position: relative;
  padding: 22px 20px 22px 26px;
  background: linear-gradient(135deg, rgba(20, 23, 29, .96), rgba(20, 23, 29, .6));
  border: 1px solid var(--ab-rule);
  transition: transform .45s var(--ease), border-color .45s var(--ease), background .45s var(--ease);
}
.page-about .ab-layer::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--red);
}
.page-about .ab-layer:nth-child(2)::before { background: var(--blue); }
.page-about .ab-layer:nth-child(3)::before { background: var(--amber); }
.page-about .ab-layer:hover,
.page-about .ab-layer:focus-within {
  transform: translateX(6px);
  border-color: var(--ab-rule-strong);
  background: linear-gradient(135deg, rgba(20, 23, 29, 1), rgba(20, 23, 29, .78));
}
.page-about .ab-layer__idx {
  display: inline-block;
  font-family: var(--font-data);
  font-size: .74rem;
  letter-spacing: .16em;
  color: var(--mist);
  margin: 0 0 .7em;
}
.page-about .ab-layer h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.1rem, 2.4vw, 1.4rem);
  line-height: 1.25;
  color: var(--white);
  margin: 0 0 .6em;
}
.page-about .ab-layer p {
  margin: 0 0 1em;
  color: var(--body-text);
  font-size: .95rem;
  line-height: 1.75;
}
.page-about .ab-layer__fields {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.page-about .ab-layer__fields li {
  font-family: var(--font-data);
  font-size: .74rem;
  letter-spacing: .02em;
  color: var(--mist);
  padding: 5px 10px;
  border: 1px solid var(--ab-rule);
  background: rgba(11, 11, 13, .6);
}

.page-about .aside-note {
  border-left: 3px solid var(--red);
  padding-left: 16px;
}
.page-about .aside-note p {
  margin: 0;
  color: var(--mist);
  font-size: .92rem;
  line-height: 1.8;
}

/* ===== 02 赛季 ===== */
.page-about .ab-season__intro p,
.page-about .ab-season__note p {
  color: var(--body-text);
  line-height: 1.8;
  font-size: .98rem;
  margin: 0 0 1.4em;
  max-width: 42em;
}
.page-about .ab-season__rail {
  list-style: none;
  margin: 0 0 clamp(24px, 4vw, 40px);
  padding: 0;
  display: grid;
  gap: 10px;
  counter-reset: none;
}
.page-about .ab-season__item {
  position: relative;
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 4px 16px;
  padding: 16px 16px 16px 0;
  border-top: 1px solid var(--ab-rule);
  transition: background .4s var(--ease);
}
.page-about .ab-season__item:hover {
  background: linear-gradient(90deg, rgba(198, 255, 61, .06), transparent 62%);
}
.page-about .ab-season__r {
  font-family: var(--font-data);
  font-size: .8rem;
  letter-spacing: .06em;
  color: var(--lime);
  padding-top: .3em;
  align-self: start;
}
.page-about .ab-season__item h3 {
  grid-column: 2;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1rem, 2.2vw, 1.2rem);
  color: var(--white);
  margin: 0 0 .3em;
}
.page-about .ab-season__item p {
  grid-column: 2;
  margin: 0;
  color: var(--mist);
  font-size: .92rem;
  line-height: 1.75;
}
.page-about .ab-season__note {
  border-top: 1px solid var(--ab-rule);
  padding-top: clamp(18px, 3vw, 28px);
}
.page-about .ab-link {
  display: inline-block;
  font-family: var(--font-data);
  font-size: .84rem;
  letter-spacing: .03em;
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 231, 255, .35);
  padding-bottom: 3px;
  transition: color .3s var(--ease), border-color .3s var(--ease);
}
.page-about .ab-link:hover,
.page-about .ab-link:focus-visible {
  color: var(--lime);
  border-bottom-color: var(--lime);
}

/* ===== 03 团队 ===== */
.page-about .ab-team__grid {
  display: grid;
  gap: 28px;
  margin-bottom: clamp(30px, 5vw, 52px);
}
.page-about .ab-team__copy p {
  color: var(--body-text);
  line-height: 1.8;
  font-size: .98rem;
  margin: 0 0 1.1em;
  max-width: 40em;
}
.page-about .ab-team__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 1.6em;
}
.page-about .ab-team__fig {
  margin: 0;
  padding: 0;
  border: 1px solid var(--ab-rule);
  background: var(--char);
}
.page-about .ab-team__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(.85) contrast(1.08);
}
.page-about .ab-team__fig .media__caption {
  display: block;
  padding: 12px 14px 14px;
  font-size: .8rem;
  line-height: 1.6;
  color: var(--mist);
  border-top: 1px solid var(--ab-rule);
}

.page-about .ab-team__sub {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.05rem, 2.6vw, 1.35rem);
  color: var(--white);
  margin: 0 0 1em;
  padding-left: 14px;
  border-left: 4px solid var(--red);
}

.page-about .ab-flow {
  display: grid;
  gap: 8px;
}
.page-about .ab-flow__node {
  border: 1px solid var(--ab-rule);
  background: rgba(20, 23, 29, .66);
  transition: border-color .4s var(--ease), background .4s var(--ease);
}
.page-about .ab-flow__node[open] {
  border-color: rgba(198, 255, 61, .5);
  background: rgba(20, 23, 29, .95);
}
.page-about .ab-flow__node summary {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}
.page-about .ab-flow__node summary::-webkit-details-marker { display: none; }
.page-about .ab-flow__node summary:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -2px;
}
.page-about .ab-flow__no {
  font-family: var(--font-data);
  font-size: .8rem;
  letter-spacing: .06em;
  color: var(--red);
}
.page-about .ab-flow__node[open] .ab-flow__no { color: var(--lime); }
.page-about .ab-flow__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(.98rem, 2.2vw, 1.1rem);
  color: var(--white);
}
.page-about .ab-flow__time {
  font-family: var(--font-data);
  font-size: .74rem;
  letter-spacing: .04em;
  color: var(--mist);
  white-space: nowrap;
}
.page-about .ab-flow__node p {
  margin: 0;
  padding: 0 16px 16px 44px;
  color: var(--body-text);
  font-size: .92rem;
  line-height: 1.78;
}

/* ===== 04 发展历程 ===== */
.page-about .ab-history__lede {
  color: var(--body-text);
  font-size: .98rem;
  line-height: 1.8;
  margin: 0 0 clamp(22px, 4vw, 36px);
  max-width: 40em;
}
.page-about .ab-timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  position: relative;
}
.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--red), rgba(200, 16, 46, .12));
}
.page-about .ab-timeline__row {
  position: relative;
  display: grid;
  gap: 8px;
  padding: 0 0 24px 26px;
}
.page-about .ab-timeline__row::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 12px;
  height: 12px;
  background: var(--ink);
  border: 2px solid var(--red);
  transform: rotate(45deg);
}
.page-about .ab-timeline__row:last-child {
  padding-bottom: 0;
}
.page-about .ab-timeline__row:last-child::before {
  border-color: var(--lime);
  background: var(--lime);
}
.page-about .ab-timeline__stage {
  font-family: var(--font-data);
  font-size: .78rem;
  letter-spacing: .1em;
  color: var(--mist);
}
.page-about .ab-timeline__card {
  padding: 16px 18px;
  background: rgba(20, 23, 29, .72);
  border: 1px solid var(--ab-rule);
  transition: border-color .4s var(--ease), transform .4s var(--ease);
}
.page-about .ab-timeline__card:hover {
  border-color: var(--ab-rule-strong);
  transform: translateX(5px);
}
.page-about .ab-timeline__card h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1rem, 2.3vw, 1.2rem);
  color: var(--white);
  margin: 0 0 .5em;
}
.page-about .ab-timeline__card p {
  margin: 0 0 .9em;
  color: var(--body-text);
  font-size: .92rem;
  line-height: 1.76;
}

/* ===== 05 合作生态 ===== */
.page-about .ab-eco__grid {
  display: grid;
  gap: 26px;
  margin-bottom: clamp(26px, 4vw, 42px);
}
.page-about .ab-eco__copy p {
  color: var(--body-text);
  line-height: 1.8;
  font-size: .98rem;
  margin: 0 0 1.1em;
  max-width: 40em;
}
.page-about .ab-eco__fig {
  margin: 0;
  border: 1px solid var(--ab-rule);
  background: var(--char);
}
.page-about .ab-eco__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(.7) contrast(1.1) brightness(.92);
}
.page-about .ab-eco__fig .media__caption {
  display: block;
  padding: 12px 14px 14px;
  font-size: .8rem;
  line-height: 1.6;
  color: var(--mist);
  border-top: 1px solid var(--ab-rule);
}

.page-about .ab-eco__blocks {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}
.page-about .ab-eco__block {
  padding: 20px 18px;
  border: 1px solid var(--ab-rule);
  background: linear-gradient(150deg, rgba(20, 23, 29, .95), rgba(20, 23, 29, .55));
  transition: border-color .4s var(--ease), background .4s var(--ease);
}
.page-about .ab-eco__block h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.02rem;
  color: var(--white);
  margin: 0 0 .5em;
  padding-top: .7em;
  border-top: 3px solid var(--red);
  display: inline-block;
}
.page-about .ab-eco__block--b h3 { border-top-color: var(--blue); }
.page-about .ab-eco__block--c h3 { border-top-color: var(--amber); }
.page-about .ab-eco__block--d h3 { border-top-color: var(--lime); }
.page-about .ab-eco__block p {
  margin: 0;
  color: var(--mist);
  font-size: .9rem;
  line-height: 1.75;
}
.page-about .ab-eco__block:hover {
  border-color: var(--ab-rule-strong);
  background: linear-gradient(150deg, rgba(20, 23, 29, 1), rgba(20, 23, 29, .72));
}

/* ===== 收尾 ===== */
.page-about .ab-cta {
  border-top: 1px solid var(--ab-rule);
  background:
    linear-gradient(120deg, rgba(200, 16, 46, .18), rgba(11, 11, 13, 0) 58%),
    var(--char);
  padding: clamp(34px, 6vw, 68px) 0;
}
.page-about .ab-cta__inner {
  display: grid;
  gap: 22px;
  align-items: center;
}
.page-about .ab-cta__copy h2 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.4rem, 4vw, 2.2rem);
  line-height: 1.1;
  color: var(--white);
  margin: 0 0 .5em;
  max-width: 18em;
}
.page-about .ab-cta__copy p {
  margin: 0;
  color: var(--body-text);
  font-size: .96rem;
  line-height: 1.78;
  max-width: 36em;
}
.page-about .ab-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ===== 断点 ===== */
@media (min-width: 720px) {
  .page-about .ab-team__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .ab-eco__blocks {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .ab-flow__node summary {
    grid-template-columns: 48px 1fr auto;
  }
}

@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .78fr);
    gap: clamp(40px, 5vw, 64px);
  }
  .page-about .ab-node__grid {
    grid-template-columns: var(--ab-track) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 48px);
  }
  .page-about .ab-node__mark {
    display: block;
    position: relative;
  }
  .page-about .ab-node__mark::before {
    content: "";
    position: absolute;
    left: 15px;
    top: 46px;
    bottom: calc(-1 * clamp(38px, 7vw, 84px));
    width: 2px;
    background: linear-gradient(180deg, var(--red), rgba(200, 16, 46, .06));
  }
  .page-about .ab-node:last-child .ab-node__mark::before {
    display: none;
  }
  .page-about .ab-node__num {
    display: block;
    font-family: var(--font-data);
    font-size: 1.5rem;
    line-height: 1;
    color: var(--white);
    padding: 10px 0 0;
    position: relative;
  }
  .page-about .ab-node__num::before {
    content: "";
    position: absolute;
    left: 8px;
    top: 0;
    width: 16px;
    height: 3px;
    background: var(--lime);
  }
  .page-about .ab-node__cap {
    display: block;
    margin-top: 10px;
    font-family: var(--font-data);
    font-size: .72rem;
    letter-spacing: .18em;
    color: var(--mist);
  }
  .page-about .ab-node__split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 240px);
    gap: clamp(28px, 3.5vw, 44px);
    align-items: start;
  }
  .page-about .ab-season__item {
    grid-template-columns: 68px minmax(0, 1fr);
    align-items: baseline;
  }
  .page-about .ab-team__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: clamp(30px, 4vw, 52px);
    align-items: start;
  }
  .page-about .ab-eco__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: clamp(30px, 4vw, 52px);
    align-items: start;
  }
  .page-about .ab-timeline__row {
    grid-template-columns: 140px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
    padding-left: 32px;
  }
  .page-about .ab-timeline__row::before {
    left: 0;
    top: 4px;
  }
  .page-about .ab-timeline__stage {
    padding-top: .55em;
  }
  .page-about .ab-cta__inner {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 40px;
  }
}

@media (min-width: 1180px) {
  .page-about .ab-node__grid {
    grid-template-columns: 116px minmax(0, 1fr);
  }
  .page-about .ab-eco__blocks {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .ab-season__rail {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0;
  }
  .page-about .ab-season__item {
    grid-template-columns: 1fr;
    padding: 22px 16px 22px 0;
    border-top: 2px solid var(--red);
    align-self: stretch;
  }
  .page-about .ab-season__item:nth-child(3),
  .page-about .ab-season__item:nth-child(4) {
    border-top-color: var(--blue);
  }
  .page-about .ab-season__item:nth-child(5) {
    border-top-color: var(--amber);
  }
  .page-about .ab-season__item h3,
  .page-about .ab-season__item p {
    grid-column: 1;
  }
  .page-about .ab-season__r {
    padding-top: 0;
    margin-bottom: .4em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-layer,
  .page-about .ab-timeline__card,
  .page-about .ab-season__item,
  .page-about .ab-eco__block,
  .page-about .ab-flow__node,
  .page-about .ab-link,
  .page-about .crumbs a {
    transition: none !important;
  }
  .page-about .ab-layer:hover,
  .page-about .ab-layer:focus-within,
  .page-about .ab-timeline__card:hover {
    transform: none;
  }
}
<<<END>>>
</main>