.page-about {
  --ab-edge: clamp(20px, 4vw, 44px);
  --ab-hair: rgba(29, 58, 95, .85);
}

/* ---------- 面包屑 ---------- */
.page-about .crumb {
  padding-top: 18px;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding-block: clamp(18px, 3vw, 30px) clamp(30px, 5vw, 60px);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(29, 58, 95, .5) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(29, 58, 95, .5) 1px, transparent 1px);
  background-size: 76px 76px;
  -webkit-mask-image: radial-gradient(ellipse at 18% 6%, #000 0%, transparent 74%);
  mask-image: radial-gradient(ellipse at 18% 6%, #000 0%, transparent 74%);
  pointer-events: none;
  z-index: 0;
}

.page-about .ab-hero__grid,
.page-about .ab-stats {
  position: relative;
  z-index: 1;
}

.page-about .ab-hero__grid {
  display: grid;
  gap: var(--ab-edge);
}

.page-about .ab-hero__lede {
  position: relative;
}

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

.page-about .ab-hero__title {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 6.2vw, 3.7rem);
  line-height: 1.06;
  letter-spacing: -.045em;
  color: var(--foam);
  margin: 14px 0 20px;
  text-wrap: balance;
}

.page-about .ab-hero__title-accent {
  display: block;
  color: var(--coral);
  margin-top: .18em;
}

.page-about .ab-hero__text {
  margin: 0 0 14px;
  max-width: 46ch;
  font-size: clamp(.92rem, 2.4vw, 1rem);
  line-height: 1.82;
  color: var(--ink);
}

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

.page-about .ab-hero__fig {
  margin: 0;
  border: 2px solid var(--blueprint);
  box-shadow: 10px 10px 0 rgba(5, 11, 26, .85);
  background: var(--hull);
}

.page-about .ab-hero__fig .fig__cap {
  padding: 10px 14px;
  font-size: .76rem;
  color: var(--steel);
  border-top: 1px solid var(--ab-hair);
}

/* ---------- 统计条 ---------- */
.page-about .ab-stats {
  list-style: none;
  margin: clamp(30px, 5vw, 48px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--ab-hair);
}

.page-about .ab-stats__item {
  padding: 18px 12px 18px 0;
  border-bottom: 1px solid var(--ab-hair);
}

.page-about .ab-stats__num {
  display: block;
  font-size: clamp(1.45rem, 5.4vw, 2.05rem);
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--lime);
}

.page-about .ab-stats__label {
  display: block;
  margin-top: 6px;
  font-size: .8rem;
  letter-spacing: .02em;
  color: var(--steel);
}

/* ---------- 页内索引 ---------- */
.page-about .ab-index {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 10px 0;
  border-top: 1px solid var(--ab-hair);
  border-bottom: 1px solid var(--ab-hair);
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-about .ab-index__link {
  flex: 0 0 auto;
  padding: 7px 13px;
  border: 1px solid var(--ab-hair);
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .04em;
  color: var(--ink);
  text-decoration: none;
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}

.page-about .ab-index__link:hover,
.page-about .ab-index__link:focus-visible {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--deep);
}

/* ---------- 品牌坐标 ---------- */
.page-about #coordinate,
.page-about #phases,
.page-about #team,
.page-about #eco,
.page-about #honor,
.page-about #start {
  scroll-margin-top: 24px;
}

.page-about .ab-coordinate__grid {
  display: grid;
  gap: var(--ab-edge);
}

.page-about .ab-coordinate__intro .sec__lede {
  max-width: 44ch;
}

.page-about .ab-coordinate__note {
  margin: 18px 0 0;
  padding-left: 14px;
  border-left: 3px solid var(--coral);
  font-size: .86rem;
  line-height: 1.7;
  color: var(--steel);
}

.page-about .ab-principles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .ab-principles__item {
  position: relative;
}

.page-about .ab-principles__item:nth-child(1) {
  border-left: 3px solid var(--coral);
}

.page-about .ab-principles__item:nth-child(2) {
  border-left: 3px solid var(--cyan);
}

.page-about .ab-principles__item:nth-child(3) {
  border-left: 3px solid var(--lime);
}

/* ---------- 发展路径 ---------- */
.page-about .ab-phases__fig {
  margin: 0 0 clamp(26px, 4vw, 42px);
  border: 2px solid var(--blueprint);
  box-shadow: 8px 8px 0 rgba(5, 11, 26, .8);
}

.page-about .ab-phase {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.page-about .ab-phase::before {
  content: "";
  position: absolute;
  left: 26px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--coral) 0%, var(--cyan) 52%, var(--lime) 100%);
  opacity: .55;
}

.page-about .ab-phase__item {
  position: relative;
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 16px;
  padding: 22px 0;
  border-bottom: 1px solid var(--ab-hair);
  transition: background .25s ease;
}

.page-about .ab-phase__item:hover {
  background: linear-gradient(90deg, rgba(34, 230, 211, .07), transparent 72%);
}

.page-about .ab-phase__tick {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  border: 2px solid var(--blueprint);
  background: var(--deep);
  color: var(--cyan);
  font-size: .9rem;
  letter-spacing: .06em;
  align-self: start;
}

.page-about .ab-phase__item:nth-child(1) .ab-phase__tick { color: var(--coral); border-color: var(--coral); }
.page-about .ab-phase__item:nth-child(4) .ab-phase__tick { color: var(--lime); border-color: var(--lime); }

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

.page-about .ab-phase__title {
  margin: 0 0 10px;
  font-size: clamp(1.05rem, 3.4vw, 1.28rem);
  line-height: 1.35;
  letter-spacing: -.02em;
  color: var(--foam);
}

.page-about .ab-phase__text {
  margin: 0 0 10px;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .ab-phase__note {
  margin: 0;
  padding-left: 12px;
  border-left: 2px solid var(--ab-hair);
  font-size: .82rem;
  line-height: 1.7;
  color: var(--steel);
}

/* ---------- 团队 ---------- */
.page-about .ab-team__layout {
  display: grid;
  gap: var(--ab-edge);
}

.page-about .ab-team__fig {
  margin: 0;
  border: 2px solid var(--blueprint);
  box-shadow: 8px 8px 0 rgba(5, 11, 26, .8);
}

.page-about .ab-team__fig .fig__cap {
  padding: 10px 14px;
  font-size: .76rem;
  color: var(--steel);
  border-top: 1px solid var(--ab-hair);
}

.page-about .ab-team__grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
}

.page-about .ab-team__card {
  min-width: 0;
  padding: 18px 16px 20px;
  border: 2px solid var(--blueprint);
  background: linear-gradient(155deg, var(--buoy) 0%, rgba(10, 24, 48, .55) 100%);
  box-shadow: 6px 6px 0 rgba(5, 11, 26, .75);
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}

.page-about .ab-team__card:hover {
  transform: translate(-3px, -3px);
  border-color: var(--cyan);
  box-shadow: 9px 9px 0 rgba(34, 230, 211, .22);
}

.page-about .ab-team__count {
  display: block;
  font-size: 1.9rem;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--cyan);
}

.page-about .ab-team__name {
  margin: 10px 0 8px;
  font-size: 1rem;
  letter-spacing: -.01em;
  color: var(--foam);
}

.page-about .ab-team__text {
  margin: 0;
  font-size: .84rem;
  line-height: 1.72;
  color: var(--ink);
}

/* ---------- 合作生态 ---------- */
.page-about .ab-eco__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-bottom: 1px solid var(--ab-hair);
}

.page-about .ab-eco__item {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  padding: 22px 16px 22px 0;
  border-top: 1px solid var(--ab-hair);
  transition: background .25s ease, padding-left .25s ease;
}

.page-about .ab-eco__item:hover {
  background: linear-gradient(90deg, rgba(255, 93, 58, .08), transparent 76%);
  padding-left: 12px;
}

.page-about .ab-eco__num {
  font-size: clamp(1.5rem, 5vw, 2rem);
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--coral);
}

.page-about .ab-eco__item:nth-child(2) .ab-eco__num { color: var(--cyan); }
.page-about .ab-eco__item:nth-child(3) .ab-eco__num { color: var(--lime); }

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

.page-about .ab-eco__title {
  margin: 2px 0 8px;
  font-size: 1.05rem;
  letter-spacing: -.015em;
  color: var(--foam);
}

.page-about .ab-eco__text {
  margin: 0;
  max-width: 62ch;
  font-size: .88rem;
  line-height: 1.78;
  color: var(--ink);
}

/* ---------- 荣誉与反馈 ---------- */
.page-about .ab-honor__grid {
  display: grid;
  gap: var(--ab-edge);
}

.page-about .ab-honor__score {
  padding: 26px 22px 28px;
  border: 2px solid var(--coral);
  background: linear-gradient(150deg, rgba(255, 93, 58, .14) 0%, rgba(16, 31, 58, .9) 62%);
  box-shadow: 10px 10px 0 rgba(5, 11, 26, .85);
}

.page-about .ab-honor__num {
  display: inline-block;
  font-size: clamp(3rem, 12vw, 4.6rem);
  line-height: .9;
  letter-spacing: -.05em;
  color: var(--foam);
}

.page-about .ab-honor__den {
  display: inline-block;
  margin-left: 6px;
  font-size: clamp(1rem, 3.6vw, 1.3rem);
  color: var(--coral);
}

.page-about .ab-honor__cap {
  margin: 14px 0 10px;
  font-size: .92rem;
  letter-spacing: .02em;
  color: var(--foam);
}

.page-about .ab-honor__sub {
  margin: 0;
  font-size: .82rem;
  line-height: 1.72;
  color: var(--steel);
}

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

.page-about .ab-honor__item {
  padding: 18px 18px 20px;
  border: 2px solid var(--blueprint);
  background: var(--buoy);
  transition: transform .25s ease, border-color .25s ease;
}

.page-about .ab-honor__item:hover {
  transform: translateX(6px);
  border-color: var(--cyan);
}

.page-about .ab-honor__name {
  margin: 12px 0 8px;
  font-size: 1.02rem;
  line-height: 1.4;
  letter-spacing: -.015em;
  color: var(--foam);
}

.page-about .ab-honor__text {
  margin: 0;
  font-size: .84rem;
  line-height: 1.72;
  color: var(--ink);
}

/* ---------- 从这里开始 ---------- */
.page-about .ab-start__panel {
  position: relative;
  padding: clamp(26px, 5vw, 48px) clamp(20px, 4.5vw, 52px) clamp(30px, 5vw, 52px);
  border: 2px solid var(--blueprint);
  background:
    radial-gradient(circle at 88% 12%, rgba(34, 230, 211, .18) 0%, transparent 46%),
    radial-gradient(circle at 6% 92%, rgba(255, 93, 58, .16) 0%, transparent 50%),
    var(--hull);
  box-shadow: 12px 12px 0 rgba(5, 11, 26, .9);
}

.page-about .ab-start__title {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 5vw, 2.2rem);
  line-height: 1.18;
  letter-spacing: -.035em;
  color: var(--foam);
  margin: 14px 0 16px;
  max-width: 22ch;
}

.page-about .ab-start__text {
  margin: 0;
  max-width: 62ch;
  font-size: .92rem;
  line-height: 1.85;
  color: var(--ink);
}

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

/* ---------- 桌面端 ---------- */
@media (min-width: 900px) {
  .page-about .ab-hero__grid {
    grid-template-columns: 1.12fr .88fr;
    align-items: start;
  }

  .page-about .ab-hero__fig {
    margin-top: 12px;
  }

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

  .page-about .ab-stats__item {
    padding: 22px 18px 22px 0;
  }

  .page-about .ab-coordinate__grid {
    grid-template-columns: .92fr 1.08fr;
    align-items: start;
  }

  .page-about .ab-principles {
    gap: 18px;
  }

  .page-about .ab-principles__item:nth-child(2) {
    margin-left: 32px;
  }

  .page-about .ab-principles__item:nth-child(3) {
    margin-left: 64px;
  }

  .page-about .ab-phase__item {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 26px;
    padding: 28px 0;
  }

  .page-about .ab-phase::before {
    left: 31px;
  }

  .page-about .ab-phase__tick {
    width: 64px;
    height: 64px;
  }

  .page-about .ab-team__layout {
    grid-template-columns: .82fr 1.18fr;
    align-items: start;
  }

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

  .page-about .ab-eco__item {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 32px;
  }

  .page-about .ab-honor__grid {
    grid-template-columns: .78fr 1.22fr;
    align-items: start;
  }
}

@media (min-width: 1280px) {
  .page-about .ab-hero__side {
    display: block;
    position: absolute;
    left: -34px;
    top: 4px;
    z-index: 1;
    writing-mode: vertical-rl;
    font-size: .64rem;
    letter-spacing: .32em;
    color: var(--steel);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .page-about .ab-team__card,
  .page-about .ab-honor__item,
  .page-about .ab-eco__item,
  .page-about .ab-phase__item {
    transition: none !important;
  }

  .page-about .ab-team__card:hover,
  .page-about .ab-honor__item:hover {
    transform: none;
  }
}