/* ================= 品牌故事页 ================= */
.page-about{
  --ab-rule: rgba(216, 228, 225, .16);
  --ab-rule-dark: rgba(17, 20, 19, .16);
  background: var(--c-ink);
  color: var(--c-silver);
  overflow-x: hidden;
}
.page-about img{
  max-width: 100%;
  height: auto;
}

/* ---------- 通用小件 ---------- */
.page-about .about-crumb{
  margin: 0 0 28px;
}
.page-about .about-crumb ol{
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .12em;
}
.page-about .about-crumb li{
  display: flex;
  align-items: center;
  gap: 8px;
}
.page-about .about-crumb li + li::before{
  content: "/";
  color: var(--c-stone);
}
.page-about .about-crumb a{
  color: var(--c-stone);
  text-decoration: none;
  transition: color var(--t-fast);
}
.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible{
  color: var(--c-orange);
}
.page-about .about-crumb [aria-current="page"]{
  color: var(--c-silver);
}

.page-about .about-eyebrow{
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .26em;
  color: var(--c-orange);
}
.page-about .about-eyebrow::after{
  content: "";
  flex: 1;
  height: 1px;
  background: currentColor;
  opacity: .32;
}

.page-about h2{
  margin: 18px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.6rem, 4.4vw, 2.5rem);
  line-height: 1.16;
  letter-spacing: -.025em;
  color: var(--c-cream);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  padding: 26px 0 0;
  background:
    radial-gradient(120% 90% at 84% -10%, rgba(35, 64, 95, .5) 0%, rgba(11, 36, 29, 0) 60%),
    var(--c-ink);
  border-bottom: 1px solid var(--ab-rule);
}
.page-about .about-kicker{
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .3em;
  color: var(--c-orange);
}
.page-about .about-kicker::after{
  content: "";
  flex: 1;
  height: 1px;
  background: var(--ab-rule);
}
.page-about .about-hero-head{
  position: relative;
}
.page-about .about-hero h1{
  margin: 22px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2.1rem, 9vw, 5.2rem);
  line-height: 1.04;
  letter-spacing: -.038em;
  color: var(--c-cream);
}
.page-about .about-vert{
  display: none;
}
.page-about .about-lead{
  margin: 26px 0 0;
  max-width: 34em;
  font-size: clamp(1rem, 1.6vw, 1.08rem);
  line-height: 1.8;
  color: var(--c-silver);
}
.page-about .about-hero-figure{
  position: relative;
  margin: 34px 0 0;
  border: 1px solid var(--ab-rule);
  overflow: hidden;
}
.page-about .about-hero-figure img{
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(.68) brightness(.82) contrast(1.06);
}

/* ---------- 起点 ---------- */
.page-about .about-origin{
  padding: 54px 0 58px;
  border-bottom: 1px solid var(--ab-rule);
}
.page-about .about-split{
  display: grid;
  gap: 26px;
}
.page-about .about-rail-note{
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .18em;
  color: var(--c-stone);
  writing-mode: vertical-rl;
  display: none;
}
.page-about .about-body p{
  margin: 0 0 16px;
  max-width: 36em;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--c-silver);
}
.page-about .about-body p:last-child{
  margin-bottom: 0;
}

/* ---------- 发展历程 ---------- */
.page-about .about-history{
  padding: 54px 0 60px;
  background: var(--c-cream);
  color: var(--c-coal);
}
.page-about .about-history .about-eyebrow{
  color: var(--c-indigo);
}
.page-about .about-history h2{
  color: var(--c-coal);
}
.page-about .about-years{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 26px 0 0;
}
.page-about .about-years a{
  display: inline-block;
  padding: 6px 14px;
  font-family: var(--font-mono);
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--c-indigo);
  text-decoration: none;
  border: 1px solid var(--ab-rule-dark);
  background: transparent;
  clip-path: polygon(0 0, 100% 0, 100% 68%, calc(100% - 10px) 100%, 0 100%);
  transition: background var(--t-fast), color var(--t-fast);
}
.page-about .about-years a:hover,
.page-about .about-years a:focus-visible{
  background: var(--c-indigo);
  color: var(--c-cream);
}
.page-about .about-track{
  list-style: none;
  margin: 36px 0 0;
  padding: 0 0 0 26px;
  border-left: 1px solid var(--ab-rule-dark);
}
.page-about .about-node{
  position: relative;
  padding-bottom: 32px;
  scroll-margin-top: 84px;
}
.page-about .about-node:last-child{
  padding-bottom: 0;
}
.page-about .about-node::before{
  content: "";
  position: absolute;
  left: -31px;
  top: 10px;
  width: 9px;
  height: 9px;
  background: var(--c-moss);
  transform: rotate(45deg);
}
.page-about .about-node-year{
  display: block;
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--c-indigo);
}
.page-about .about-node-body h3{
  margin: 8px 0 8px;
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--c-coal);
  line-height: 1.45;
}
.page-about .about-node-body p{
  margin: 0;
  max-width: 42em;
  font-size: .94rem;
  line-height: 1.8;
  color: var(--c-coal);
}

/* ---------- 团队 ---------- */
.page-about .about-team{
  padding: 54px 0 58px;
  background: var(--c-coal);
}
.page-about .about-team-grid{
  display: grid;
  gap: 28px;
  margin-top: 26px;
}
.page-about .about-fig{
  position: relative;
  margin: 0;
  border: 1px solid var(--ab-rule);
  overflow: hidden;
}
.page-about .about-fig img{
  display: block;
  width: 100%;
  object-fit: cover;
  filter: saturate(.66) brightness(.86) contrast(1.05);
}
.page-about .about-fig figcaption{
  padding: 10px 12px;
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .12em;
  color: var(--c-stone);
  border-top: 1px solid var(--ab-rule);
}
.page-about .about-team-copy p{
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--c-silver);
}
.page-about .about-team-nums{
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 24px 0 0;
  border: 1px solid var(--ab-rule);
  background: var(--ab-rule);
}
.page-about .about-team-num{
  background: var(--c-ink);
  padding: 16px 16px 18px;
}
.page-about .about-team-num b{
  display: block;
  font-family: var(--font-mono);
  font-size: 1.7rem;
  font-weight: 600;
  letter-spacing: -.02em;
  color: var(--c-orange);
  line-height: 1.1;
}
.page-about .about-team-num span{
  display: block;
  margin-top: 6px;
  font-size: .78rem;
  letter-spacing: .1em;
  color: var(--c-silver);
}

/* ---------- 可展开内容组 ---------- */
.page-about .about-fold{
  margin-top: 22px;
  border-top: 1px solid var(--ab-rule);
}
.page-about .about-fold summary{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-size: .95rem;
  font-weight: 700;
  color: var(--c-cream);
  transition: color var(--t-fast);
}
.page-about .about-fold summary::-webkit-details-marker{
  display: none;
}
.page-about .about-fold summary::after{
  content: "+";
  font-family: var(--font-mono);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--c-orange);
}
.page-about .about-fold[open] summary::after{
  content: "\2212";
}
.page-about .about-fold summary:hover{
  color: var(--c-orange);
}
.page-about .about-roles{
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
}
.page-about .about-roles li{
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr);
  gap: 12px;
  padding: 10px 0;
  border-top: 1px solid var(--ab-rule);
  font-size: .88rem;
  line-height: 1.75;
  color: var(--c-silver);
}
.page-about .about-roles b{
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: .82rem;
  letter-spacing: .04em;
  color: var(--c-orange);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners{
  padding: 54px 0 58px;
  background: var(--c-ink);
  border-top: 1px solid var(--ab-rule);
}
.page-about .about-partners-grid{
  display: grid;
  gap: 28px;
  margin-top: 26px;
}
.page-about .about-partners-copy p{
  margin: 0;
  max-width: 34em;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--c-silver);
}
.page-about .about-stats{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--ab-rule);
  background: var(--ab-rule);
}
.page-about .about-stats li{
  background: var(--c-coal);
  padding: 18px 16px;
}
.page-about .about-stat-num{
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.6rem, 5.5vw, 2.1rem);
  font-weight: 600;
  letter-spacing: -.02em;
  line-height: 1.1;
  color: var(--c-orange);
}
.page-about .about-stat-plus{
  font-size: .8em;
}
.page-about .about-stat-label{
  display: block;
  margin-top: 6px;
  font-size: .78rem;
  letter-spacing: .08em;
  color: var(--c-silver);
}

/* ---------- 内容流程 ---------- */
.page-about .about-flow-sec{
  padding: 54px 0 58px;
  background: var(--c-coal);
  border-top: 1px solid var(--ab-rule);
}
.page-about .about-flow-lead{
  margin: 20px 0 0;
  max-width: 36em;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--c-silver);
}
.page-about .about-flow{
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  border: 1px solid var(--ab-rule);
  background: var(--ab-rule);
}
.page-about .about-flow-step{
  background: var(--c-ink);
  padding: 22px 18px 24px;
}
.page-about .about-flow-num{
  display: block;
  font-family: var(--font-mono);
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .2em;
  color: var(--c-orange);
}
.page-about .about-flow-step h3{
  margin: 12px 0 8px;
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 800;
  line-height: 1.45;
  color: var(--c-cream);
}
.page-about .about-flow-step p{
  margin: 0;
  font-size: .88rem;
  line-height: 1.75;
  color: var(--c-silver);
}
.page-about .about-series{
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 18px;
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--ab-rule);
}
.page-about .about-series-label{
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .22em;
  color: var(--c-stone);
}
.page-about .about-series-list{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-series-list li{
  padding: 5px 12px;
  font-size: .8rem;
  letter-spacing: .06em;
  color: var(--c-ink);
  background: var(--c-amber);
  clip-path: polygon(0 0, 100% 0, 100% 66%, calc(100% - 9px) 100%, 0 100%);
}

/* ---------- 行业参与 ---------- */
.page-about .about-recog{
  padding: 54px 0 58px;
  background: var(--c-cream);
  color: var(--c-coal);
}
.page-about .about-recog .about-eyebrow{
  color: var(--c-indigo);
}
.page-about .about-recog h2{
  color: var(--c-coal);
}
.page-about .about-recog p{
  margin: 18px 0 0;
  max-width: 32em;
  font-size: .98rem;
  line-height: 1.85;
  color: var(--c-coal);
}
.page-about .about-recog-list{
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  border-top: 1px solid var(--ab-rule-dark);
}
.page-about .about-recog-list li{
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-bottom: 1px solid var(--ab-rule-dark);
}
.page-about .about-recog-num{
  font-family: var(--font-mono);
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--c-moss);
  padding-top: 3px;
}
.page-about .about-recog-list h3{
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 800;
  line-height: 1.5;
  color: var(--c-coal);
}
.page-about .about-recog-list p{
  margin: 0;
  max-width: 40em;
  font-size: .9rem;
  line-height: 1.75;
  color: var(--c-coal);
}

/* ---------- 服务范围 ---------- */
.page-about .about-reach{
  padding: 54px 0 58px;
  background: var(--c-ink);
}
.page-about .about-reach-grid{
  display: grid;
  gap: 32px;
}
.page-about .about-reach-copy p{
  margin: 20px 0 0;
  max-width: 34em;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--c-silver);
}
.page-about .about-reach-actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}
.page-about .about-reach-facts{
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  border: 1px solid var(--ab-rule);
  background: var(--ab-rule);
}
.page-about .about-reach-facts > div{
  background: var(--c-coal);
  padding: 18px 16px 20px;
}
.page-about .about-reach-facts dt{
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 5vw, 2rem);
  font-weight: 600;
  letter-spacing: -.02em;
  line-height: 1.1;
  color: var(--c-silver);
}
.page-about .about-reach-facts dd{
  margin: 8px 0 0;
  font-size: .78rem;
  line-height: 1.6;
  letter-spacing: .06em;
  color: var(--c-stone);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta{
  padding: 50px 0 56px;
  background: var(--c-coal);
  border-top: 1px solid var(--ab-rule);
}
.page-about .about-cta-inner h2{
  margin: 0;
  color: var(--c-cream);
}
.page-about .about-cta-inner p{
  margin: 18px 0 0;
  max-width: 34em;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--c-silver);
}
.page-about .about-cta-actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px){
  .page-about .about-team-nums{
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-flow{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px){
  .page-about .about-hero{
    padding-top: 36px;
  }
  .page-about .about-lead{
    margin-top: 30px;
  }
  .page-about .about-hero-figure{
    margin-top: 40px;
  }
  .page-about .about-origin,
  .page-about .about-history,
  .page-about .about-team,
  .page-about .about-partners,
  .page-about .about-flow-sec,
  .page-about .about-recog,
  .page-about .about-reach{
    padding-top: 72px;
    padding-bottom: 76px;
  }
  .page-about .about-split{
    grid-template-columns: minmax(0, 3fr) minmax(0, 7fr);
    gap: 56px;
  }
  .page-about .about-rail-note{
    display: block;
  }
  .page-about .about-team-grid{
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
    gap: 52px;
    align-items: start;
  }
  .page-about .about-partners-grid{
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 48px;
    align-items: start;
  }
  .page-about .about-recog-grid{
    display: grid;
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: 56px;
    align-items: start;
  }
  .page-about .about-recog-list{
    margin-top: 0;
  }
  .page-about .about-reach-grid{
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 56px;
    align-items: start;
  }
  .page-about .about-flow{
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-node{
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 0 32px;
    padding-bottom: 38px;
  }
  .page-about .about-node-year{
    font-size: 1.6rem;
    text-align: right;
  }
  .page-about .about-node-body h3{
    margin-top: 0;
  }
}

@media (min-width: 1080px){
  .page-about .about-vert{
    display: block;
    position: absolute;
    top: 0;
    right: 0;
    margin: 0;
    writing-mode: vertical-rl;
    font-family: var(--font-mono);
    font-size: .68rem;
    letter-spacing: .34em;
    color: var(--c-stone);
  }
  .page-about .about-lead{
    max-width: 30em;
  }
}

@media (prefers-reduced-motion: reduce){
  .page-about .about-years a,
  .page-about .about-fold summary,
  .page-about .about-crumb a{
    transition: none;
  }
}