/* ===== 品牌故事页 / page-about ===== */

.page-about .ab-hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(160deg, var(--ink) 0%, var(--ink-2) 62%, #0d1f4d 100%);
  color: var(--white);
  padding: clamp(36px, 7vw, 84px) 0 clamp(44px, 8vw, 96px);
  border-bottom: var(--line);
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  inset: auto -12% -34% 38%;
  height: 66%;
  background: linear-gradient(115deg, rgba(27, 77, 228, 0) 0%, rgba(27, 77, 228, .55) 46%, rgba(53, 242, 224, .22) 100%);
  transform: skewY(-7deg);
  pointer-events: none;
}

.page-about .ab-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(28px, 5vw, 48px);
}

.page-about .ab-hero .eyebrow {
  color: var(--cyan);
}

.page-about .ab-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(32px, 7.6vw, 62px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  font-weight: 900;
  color: var(--white);
  max-width: 20em;
}

.page-about .ab-hero__text {
  margin: 20px 0 0;
  font-size: clamp(16px, 2vw, 17px);
  line-height: 1.8;
  color: rgba(244, 247, 255, .82);
  max-width: 46ch;
}

.page-about .ab-hero__actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .ab-hero .btn--primary {
  background: var(--orange);
  color: var(--ink);
  box-shadow: 4px 4px 0 rgba(53, 242, 224, .35);
}

.page-about .ab-hero .btn--outline {
  border-color: var(--cyan);
  color: var(--cyan);
  background: transparent;
  box-shadow: 4px 4px 0 rgba(53, 242, 224, .18);
}

.page-about .ab-hero__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-fact {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 14px 16px;
  border: 2px solid rgba(53, 242, 224, .5);
  background: rgba(10, 22, 51, .6);
}

.page-about .ab-fact__num {
  font-size: clamp(26px, 5vw, 38px);
  font-weight: 700;
  color: var(--cyan);
  line-height: 1;
  min-width: 2.6em;
}

.page-about .ab-fact__label {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(244, 247, 255, .86);
}

/* ---- 主体布局 ---- */

.page-about .ab-layout {
  padding-top: clamp(40px, 6vw, 72px);
  display: grid;
  gap: clamp(32px, 5vw, 56px);
}

.page-about .ab-toc {
  display: none;
}

.page-about .ab-toc__title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--graphite);
  text-transform: uppercase;
}

.page-about .ab-toc .toc {
  display: flex;
  flex-direction: column;
  gap: 2px;
  border-left: 2px solid var(--ink);
  padding-left: 14px;
}

.page-about .ab-toc .toc-link {
  font-size: 13px;
  line-height: 1.5;
  padding: 6px 0;
  color: var(--graphite);
  text-decoration: none;
  transition: color .18s var(--ease), transform .18s var(--ease);
}

.page-about .ab-toc .toc-link:hover,
.page-about .ab-toc .toc-link:focus-visible {
  color: var(--blue);
  transform: translateX(3px);
}

.page-about .ab-toc .toc-link.is-active {
  color: var(--blue);
  font-weight: 700;
}

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

.page-about .ab-section {
  padding: clamp(36px, 6vw, 72px) 0;
}

.page-about .ab-section + .ab-section {
  border-top: 2px dashed rgba(74, 84, 116, .35);
}

.page-about .ab-section:first-child {
  padding-top: 0;
}

.page-about .ab-head {
  max-width: 62ch;
}

.page-about .ab-head__text {
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--graphite);
}

/* ---- 起点与赛场观 ---- */

.page-about .ab-split {
  display: grid;
  gap: 28px;
}

.page-about .ab-split__body p {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--graphite);
}

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

.page-about .ab-figure {
  margin: 0;
  border: var(--line);
  box-shadow: var(--hard);
  background: var(--mist);
  overflow: hidden;
}

.page-about .ab-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .ab-figure--wide {
  margin-top: clamp(28px, 4vw, 44px);
}

.page-about .ab-figure .media-frame__caption {
  display: block;
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--graphite);
  background: var(--mist);
  border-top: 2px solid var(--ink);
}

/* ---- 版本时间线（深色面板） ---- */

.page-about .ab-panel--ink {
  background: linear-gradient(150deg, var(--ink) 0%, var(--ink-2) 100%);
  border: var(--line);
  box-shadow: var(--hard);
  padding: clamp(22px, 4.4vw, 48px);
  color: var(--white);
}

.page-about .ab-panel--ink .eyebrow {
  color: var(--cyan);
}

.page-about .ab-panel--ink .section-title {
  color: var(--white);
}

.page-about .ab-panel--ink .ab-head__text {
  color: rgba(244, 247, 255, .8);
}

.page-about .ab-timeline {
  list-style: none;
  margin: clamp(28px, 4vw, 40px) 0 0;
  padding: 0 0 0 26px;
  position: relative;
}

.page-about .ab-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--blue) 55%, rgba(91, 140, 255, .35) 100%);
}

.page-about .ab-tl-item {
  position: relative;
  padding: 0 0 clamp(26px, 4vw, 38px);
}

.page-about .ab-tl-item:last-child {
  padding-bottom: 0;
}

.page-about .ab-tl-dot {
  position: absolute;
  left: -26px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--cyan);
  background: var(--ink);
  box-sizing: border-box;
}

.page-about .ab-tl-item--done .ab-tl-dot {
  background: var(--cyan);
}

.page-about .ab-tl-item--current .ab-tl-dot {
  background: var(--orange);
  border-color: var(--orange);
  box-shadow: 0 0 0 5px rgba(255, 106, 26, .22);
}

.page-about .ab-tl-ver {
  margin: 0;
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--cyan);
}

.page-about .ab-tl-title {
  margin: 6px 0 8px;
  font-size: clamp(18px, 3.4vw, 23px);
  line-height: 1.4;
  font-weight: 900;
  color: var(--white);
}

.page-about .ab-tl-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 247, 255, .8);
  max-width: 58ch;
}

/* ---- 团队 ---- */

.page-about .ab-crew {
  margin-top: clamp(26px, 4vw, 40px);
}

.page-about .ab-crew__bar {
  display: flex;
  height: 22px;
  border: var(--line);
  box-shadow: var(--hard-sm);
  background: var(--white);
  overflow: hidden;
}

.page-about .ab-crew__seg {
  height: 100%;
}

.page-about .ab-crew__seg--a { flex: 18 1 0; background: var(--blue); }
.page-about .ab-crew__seg--b { flex: 14 1 0; background: var(--blue-soft); }
.page-about .ab-crew__seg--c { flex: 10 1 0; background: var(--ink-2); }

.page-about .ab-crew__legend {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .ab-crew__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 14px;
  padding: 14px 16px;
  border: var(--line);
  background: var(--white);
  box-shadow: var(--hard-sm);
}

.page-about .ab-crew__num {
  grid-row: span 2;
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--blue);
  align-self: center;
}

.page-about .ab-crew__role {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .ab-crew__desc {
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--graphite);
}

/* ---- 五步流程 ---- */

.page-about .ab-steps {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  counter-reset: none;
  display: grid;
  gap: 14px;
}

.page-about .ab-step {
  position: relative;
  padding: 18px 18px 18px 22px;
  border: var(--line);
  background: var(--white);
  box-shadow: var(--hard-sm);
  border-left: 8px solid var(--blue);
}

.page-about .ab-step__no {
  display: block;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--orange);
}

.page-about .ab-step__title {
  margin: 6px 0 6px;
  font-size: 17px;
  font-weight: 900;
  color: var(--ink);
}

.page-about .ab-step__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--graphite);
}

/* ---- 栏目分类 ---- */

.page-about .ab-cats {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-cat {
  padding: 18px;
  background: var(--mist);
  border: var(--line);
  box-shadow: var(--hard-sm);
}

.page-about .ab-cat:nth-child(even) {
  background: var(--white);
}

.page-about .ab-cat__no {
  display: block;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--blue);
}

.page-about .ab-cat__name {
  margin: 6px 0 8px;
  font-size: 18px;
  font-weight: 900;
  color: var(--ink);
}

.page-about .ab-cat__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--graphite);
}

/* ---- 合作与荣誉 ---- */

.page-about .ab-partners {
  position: relative;
  overflow: hidden;
  border: var(--line);
  background: var(--ink);
  box-shadow: var(--hard);
}

.page-about .ab-partners__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .38;
}

.page-about .ab-partners__inner {
  position: relative;
  z-index: 1;
  padding: clamp(24px, 4.6vw, 52px);
  color: var(--white);
}

.page-about .ab-partners .eyebrow {
  color: var(--amber);
}

.page-about .ab-partners .section-title {
  color: var(--white);
  margin-top: 10px;
}

.page-about .ab-partners__text {
  margin: 18px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: rgba(244, 247, 255, .84);
  max-width: 62ch;
}

.page-about .ab-marks {
  list-style: none;
  margin: 26px 0 28px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-mark {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 14px 16px;
  border: 2px solid rgba(255, 194, 75, .55);
  background: rgba(10, 22, 51, .55);
}

.page-about .ab-mark__no {
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
  min-width: 1.6em;
}

.page-about .ab-mark__label {
  font-size: 14px;
  line-height: 1.6;
  color: rgba(244, 247, 255, .88);
}

.page-about .ab-partners .btn--primary {
  background: var(--orange);
  color: var(--ink);
  box-shadow: 4px 4px 0 rgba(53, 242, 224, .4);
}

/* ---- 承诺 ---- */

.page-about .ab-promises {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .ab-promise {
  padding: 18px;
  border: var(--line);
  border-top: 8px solid var(--cyan);
  background: var(--white);
  box-shadow: var(--hard-sm);
}

.page-about .ab-promise__k {
  display: block;
  font-size: 26px;
  font-weight: 700;
  color: var(--blue);
  line-height: 1.1;
}

.page-about .ab-promise__t {
  margin: 8px 0 6px;
  font-size: 16px;
  font-weight: 900;
  color: var(--ink);
}

.page-about .ab-promise__d {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--graphite);
}

/* ---- 收束 CTA ---- */

.page-about .ab-cta {
  margin: clamp(40px, 6vw, 72px) 0 clamp(56px, 8vw, 96px);
  padding: clamp(26px, 4.6vw, 52px);
  background: linear-gradient(118deg, var(--blue) 0%, var(--ink-2) 100%);
  border: var(--line);
  box-shadow: var(--hard);
  color: var(--white);
  position: relative;
  overflow: hidden;
}

.page-about .ab-cta::after {
  content: "";
  position: absolute;
  inset: auto -18% -55% 46%;
  height: 120%;
  background: linear-gradient(120deg, rgba(255, 106, 26, 0) 0%, rgba(255, 106, 26, .35) 100%);
  transform: skewY(-8deg);
  pointer-events: none;
}

.page-about .ab-cta__body {
  position: relative;
  z-index: 1;
  max-width: 60ch;
}

.page-about .ab-cta__title {
  margin: 0;
  font-size: clamp(22px, 4.4vw, 34px);
  line-height: 1.25;
  font-weight: 900;
  color: var(--white);
}

.page-about .ab-cta__text {
  margin: 16px 0 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(244, 247, 255, .86);
}

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

.page-about .ab-cta .btn--primary {
  background: var(--orange);
  color: var(--ink);
  box-shadow: 4px 4px 0 rgba(53, 242, 224, .4);
}

.page-about .ab-cta .btn--outline {
  border-color: var(--white);
  color: var(--white);
  background: transparent;
  box-shadow: 4px 4px 0 rgba(53, 242, 224, .25);
}

/* ---- 响应式 ---- */

@media (min-width: 700px) {
  .page-about .ab-hero__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: end;
  }

  .page-about .ab-split {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
    gap: clamp(28px, 4vw, 48px);
  }

  .page-about .ab-crew__legend {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .ab-crew__item {
    grid-template-columns: auto 1fr;
  }

  .page-about .ab-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .ab-cats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .ab-cats .ab-cat:last-child {
    grid-column: 1 / -1;
  }

  .page-about .ab-promises {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .ab-marks {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-about .ab-layout {
    grid-template-columns: 208px minmax(0, 1fr);
    align-items: start;
  }

  .page-about .ab-toc {
    display: block;
    position: sticky;
    top: 100px;
  }

  .page-about .ab-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .ab-cats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .ab-cats .ab-cat:last-child {
    grid-column: auto;
  }

  .page-about .ab-cat:nth-child(4) {
    background: var(--white);
  }

  .page-about .ab-cat:nth-child(5) {
    background: var(--mist);
  }

  .page-about .ab-split__body {
    padding-top: 6px;
  }

  .page-about .ab-figure--wide img {
    max-height: 420px;
  }
}

@media (min-width: 1280px) {
  .page-about .ab-hero__facts {
    gap: 14px;
  }

  .page-about .ab-promises {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-toc .toc-link {
    transition: none;
  }
}