/* ===== 品牌故事 / page-about ===== */
.page-about {
  --ab-rail-w: 220px;
  position: relative;
  isolation: isolate;
  color: var(--bone);
  background: var(--ink);
  padding-bottom: clamp(48px, 7vw, 110px);
  overflow-x: clip;
}

.page-about::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(90deg, rgba(138, 156, 147, .07) 1px, transparent 1px),
    linear-gradient(0deg, rgba(138, 156, 147, .05) 1px, transparent 1px),
    radial-gradient(120% 55% at 88% 0%, rgba(198, 255, 61, .07), transparent 62%),
    radial-gradient(90% 50% at 0% 38%, rgba(224, 166, 60, .06), transparent 66%);
  background-size: 120px 120px, 120px 120px, auto, auto;
}

.page-about > * {
  position: relative;
  z-index: 1;
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  padding: clamp(18px, 3vw, 38px) 0 clamp(26px, 3.4vw, 48px);
}

.page-about .ab-hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .ab-hero__eyebrow::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--gold);
}

.page-about .ab-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(31px, 6.2vw, 78px);
  line-height: 1.02;
  letter-spacing: -.02em;
}

.page-about .ab-hero__accent {
  font-family: var(--font-mono);
  color: var(--lime);
  letter-spacing: -.03em;
}

.page-about .ab-hero__lead {
  max-width: 62ch;
  margin: 0;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  color: var(--moss);
}

.page-about .ab-kpis {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: clamp(24px, 3vw, 40px);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.page-about .ab-kpi {
  padding: 16px 14px 18px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(19, 39, 31, .55), rgba(19, 39, 31, 0));
}

.page-about .ab-kpi__num {
  display: block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(26px, 4vw, 44px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--lime);
}

.page-about .ab-kpi__label {
  display: block;
  margin-top: 9px;
  font-size: 12.5px;
  letter-spacing: .05em;
  color: var(--moss);
}

@media (min-width: 720px) {
  .page-about .ab-kpis {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 横贯全宽的图像带 ---------- */
.page-about .ab-band {
  padding: clamp(22px, 3.4vw, 52px) var(--gutter);
}

.page-about .ab-band__inner {
  max-width: var(--shell-w);
  margin: 0 auto;
}

.page-about .ab-figure {
  margin: 0;
}

.page-about .ab-figure__frame {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  background: var(--panel);
}

.page-about .ab-figure__frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  transform: scale(1.001);
  transition: transform .6s var(--ease);
}

.page-about .ab-figure__frame:hover img,
.page-about .ab-figure__frame:focus-within img {
  transform: scale(1.035);
}

.page-about .ab-figure figcaption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--moss);
}

/* ---------- 时间线 ---------- */
.page-about .ab-track {
  padding-top: clamp(26px, 4vw, 58px);
}

.page-about .ab-track__inner {
  display: grid;
  gap: clamp(22px, 3vw, 44px);
}

.page-about .ab-rail__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--moss);
}

.page-about .ab-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .ab-rail__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--glass);
  color: var(--bone);
  font-size: 13px;
  text-decoration: none;
  transition: border-color .24s var(--ease), color .24s var(--ease), transform .24s var(--ease);
}

.page-about .ab-rail__link:hover {
  border-color: var(--lime);
  color: var(--lime);
  transform: translateY(-2px);
}

.page-about .ab-rail__link:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
  color: var(--lime);
}

.page-about .ab-rail__num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold);
}

.page-about .ab-stages {
  display: grid;
  gap: clamp(6px, 1.2vw, 16px);
}

.page-about .ab-stage {
  position: relative;
  padding: clamp(18px, 2.4vw, 30px) 0 clamp(22px, 3vw, 36px) clamp(18px, 3vw, 40px);
  border-left: 1px solid var(--line-strong);
  scroll-margin-top: calc(var(--head-h) + 28px);
}

.page-about .ab-stage::before {
  content: "";
  position: absolute;
  left: -5px;
  top: clamp(24px, 3vw, 34px);
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(224, 166, 60, .15);
  transition: background .3s var(--ease), box-shadow .3s var(--ease);
}

.page-about .ab-stage:target {
  border-left-color: var(--lime);
}

.page-about .ab-stage:target::before {
  background: var(--lime);
  box-shadow: 0 0 0 5px rgba(198, 255, 61, .18);
}

.page-about .ab-plate {
  display: inline-flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 16px;
  padding: 7px 16px 9px;
  border-radius: 3px;
  background: var(--cream);
  color: #14180F;
  transform: skewX(-8deg);
  box-shadow: 0 14px 30px rgba(0, 0, 0, .45);
}

.page-about .ab-plate__num {
  display: inline-block;
  transform: skewX(8deg);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(20px, 2.4vw, 28px);
  font-weight: 700;
  line-height: 1;
}

.page-about .ab-plate__text {
  display: inline-block;
  transform: skewX(8deg);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: #5D6156;
}

.page-about .ab-stage__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(21px, 2.8vw, 34px);
  line-height: 1.15;
  letter-spacing: -.015em;
}

.page-about .ab-stage__ver {
  display: block;
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gold);
}

.page-about .ab-stage__body {
  max-width: 64ch;
  margin: 0 0 16px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--moss);
}

.page-about .ab-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .ab-facts li {
  display: grid;
  grid-template-columns: 8px minmax(0, 1fr);
  gap: 12px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--bone);
}

.page-about .ab-facts li::before {
  content: "";
  width: 8px;
  height: 8px;
  margin-top: .6em;
  border-radius: 1px;
  background: var(--lime);
}

.page-about .ab-stage .fold {
  margin-top: 18px;
}

/* ---------- 通用章节 ---------- */
.page-about .ab-sec {
  padding: clamp(34px, 5vw, 78px) 0 0;
  scroll-margin-top: calc(var(--head-h) + 28px);
}

.page-about .ab-sec__head {
  max-width: 68ch;
  margin-bottom: clamp(20px, 2.6vw, 34px);
}

.page-about .ab-sec__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-about .ab-sec__title {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(24px, 3.6vw, 44px);
  line-height: 1.12;
  letter-spacing: -.02em;
}

.page-about .ab-sec__lead {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--moss);
}

.page-about .ab-sec a {
  color: var(--lime);
  text-decoration-color: rgba(198, 255, 61, .4);
  text-underline-offset: 3px;
}

.page-about .ab-sec a:hover {
  text-decoration-color: var(--lime);
}

/* ---------- 团队 ---------- */
.page-about .ab-team__grid {
  display: grid;
  gap: clamp(18px, 2.4vw, 34px);
}

.page-about .ab-team__cards {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.page-about .ab-team__card {
  padding: 18px 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(19, 39, 31, .78), rgba(14, 21, 19, .92));
  transition: transform .26s var(--ease), border-color .26s var(--ease), box-shadow .26s var(--ease);
}

.page-about .ab-team__card:hover {
  transform: translateY(-2px);
  border-color: var(--lime);
  box-shadow: 0 16px 34px rgba(0, 0, 0, .42);
}

.page-about .ab-team__name {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
}

.page-about .ab-team__num {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 20px;
  color: var(--lime);
  letter-spacing: -.01em;
}

.page-about .ab-team__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--moss);
}

.page-about .ab-team__figure {
  align-self: start;
}

/* ---------- 合作与覆盖 ---------- */
.page-about .ab-partners__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--line);
}

.page-about .ab-partner {
  padding: clamp(18px, 2.2vw, 28px);
  background: var(--panel);
}

.page-about .ab-partner__num {
  margin: 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(28px, 3.6vw, 42px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--gold);
}

.page-about .ab-partner__name {
  margin: 12px 0 8px;
  font-size: 15px;
  font-weight: 700;
}

.page-about .ab-partner__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--moss);
}

.page-about .ab-partners__note {
  margin: clamp(16px, 2vw, 24px) 0 0;
  padding-left: clamp(14px, 2vw, 20px);
  border-left: 2px solid var(--gold);
  max-width: 68ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--bone);
}

/* ---------- 长期运营 ---------- */
.page-about .ab-promise {
  display: grid;
  gap: clamp(20px, 2.6vw, 40px);
}

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

.page-about .ab-info {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-about .ab-info li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .ab-info__k {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--moss);
}

.page-about .ab-info__v {
  font-size: 15px;
  line-height: 1.78;
  color: var(--bone);
  overflow-wrap: anywhere;
}

.page-about .ab-info__v .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--lime);
}

.page-about .copy-btn {
  margin-left: 10px;
  padding: 4px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: transparent;
  color: var(--moss);
  font-size: 12px;
  font-family: inherit;
  cursor: pointer;
  transition: border-color .22s var(--ease), color .22s var(--ease);
}

.page-about .copy-btn:hover {
  border-color: var(--lime);
  color: var(--lime);
}

.page-about .copy-btn:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

/* ---------- 下一步 ---------- */
.page-about .ab-next__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--line);
}

.page-about .ab-next__link {
  display: block;
  padding: 20px 18px 22px;
  background: var(--panel);
  color: var(--bone);
  text-decoration: none;
  transition: background .26s var(--ease);
}

.page-about .ab-next__link:hover {
  background: var(--rail);
}

.page-about .ab-next__link:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -2px;
}

.page-about .ab-next__title {
  display: block;
  margin-bottom: 8px;
  font-size: 16px;
  font-weight: 700;
}

.page-about .ab-next__desc {
  display: block;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--moss);
}

.page-about .ab-next__more {
  display: inline-block;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--lime);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .ab-partners__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .ab-info li {
    grid-template-columns: minmax(96px, 132px) minmax(0, 1fr);
    gap: 14px;
    align-items: start;
  }
}

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

  .page-about .ab-rail {
    position: sticky;
    top: calc(var(--head-h) + 24px);
    align-self: start;
  }

  .page-about .ab-rail__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 6px;
  }

  .page-about .ab-rail__link {
    width: 100%;
    justify-content: flex-start;
    border-radius: var(--r-md);
  }

  .page-about .ab-team__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .ab-promise {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }
}

@media (min-width: 1100px) {
  .page-about .ab-next__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-figure__frame img,
  .page-about .ab-team__card,
  .page-about .ab-rail__link,
  .page-about .ab-next__link {
    transition: none;
  }

  .page-about .ab-figure__frame:hover img,
  .page-about .ab-figure__frame:focus-within img {
    transform: none;
  }
}