.page-about{
  --about-measure:34em;
  padding-block:72px 0;
  background:var(--ink);
  color:var(--fg);
  font-family:var(--font-sans);
  overflow-x:hidden;
}

.page-about .breadcrumb{margin-bottom:36px;}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  display:grid;
  gap:22px;
  max-width:900px;
}
.page-about .about-hero__title{
  margin:0;
  font-family:var(--font-display);
  font-weight:800;
  font-size:clamp(30px,6.2vw,52px);
  line-height:1.18;
  letter-spacing:-0.02em;
  color:var(--fg);
}
.page-about .about-hero__lede{
  margin:0;
  max-width:var(--about-measure);
  font-size:17px;
  line-height:1.85;
  color:var(--fg);
  opacity:.9;
}
.page-about .about-hero__stats{
  list-style:none;
  margin:10px 0 0;
  padding:0;
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  overflow:hidden;
}
.page-about .about-stat{
  background:var(--panel);
  padding:18px 16px;
  display:flex;
  flex-direction:column;
  gap:6px;
  min-height:44px;
}
.page-about .about-stat__num{
  font-size:clamp(20px,4.6vw,26px);
  font-weight:700;
  line-height:1.1;
  letter-spacing:-0.02em;
  color:var(--cyan);
}
.page-about .about-stat__label{
  font-size:13px;
  line-height:1.55;
  color:var(--muted);
}

.page-about .about-hero__media{
  margin:44px 0 0;
  border:1px solid var(--line);
  border-radius:var(--r-xl);
  overflow:hidden;
  background:var(--panel-2);
}
.page-about .about-hero__media img{
  display:block;
  width:100%;
  height:auto;
  max-width:100%;
  object-fit:cover;
  aspect-ratio:16/9;
}

/* ---------- 通用区块 ---------- */
.page-about .about-block{padding-block:62px;}
.page-about .about-block__lead{
  margin:14px 0 0;
  max-width:34em;
  font-size:15px;
  line-height:1.8;
  color:var(--muted);
}
.page-about .about-prose{max-width:940px;}
.page-about .about-prose__text{
  margin:18px 0 0;
  max-width:var(--about-measure);
  font-size:17px;
  line-height:1.95;
  color:var(--muted);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline__media{
  margin:34px auto 0;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  overflow:hidden;
  background:var(--panel-2);
}
.page-about .about-timeline__media img{
  display:block;
  width:100%;
  height:auto;
  max-width:100%;
  object-fit:cover;
  aspect-ratio:2/1;
}
.page-about .about-timeline{margin-top:26px;}
.page-about .about-timeline__track{
  list-style:none;
  margin:0;
  padding:6px 0 18px;
  display:flex;
  gap:14px;
  overflow-x:auto;
  scroll-snap-type:x mandatory;
  -webkit-overflow-scrolling:touch;
  scrollbar-width:thin;
}
.page-about .about-timeline__card{
  flex:0 0 min(80vw,290px);
  scroll-snap-align:start;
  position:relative;
  display:flex;
  flex-direction:column;
  gap:8px;
  padding:24px 20px;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
}
.page-about .about-timeline__card::before{
  content:"";
  position:absolute;
  inset:0 0 auto 0;
  height:2px;
  border-radius:0 0 2px 2px;
  background:linear-gradient(90deg,var(--amber),transparent 72%);
}
.page-about .about-timeline__node{
  width:10px;
  height:10px;
  border-radius:50%;
  border:2px solid var(--amber);
  background:var(--ink);
  box-shadow:0 0 0 4px rgba(255,180,67,.14);
}
.page-about .about-timeline__year{
  font-size:12px;
  letter-spacing:.1em;
  color:var(--muted);
}
.page-about .about-timeline__ver{
  font-size:30px;
  font-weight:700;
  line-height:1;
  letter-spacing:-0.03em;
  color:var(--amber);
}
.page-about .about-timeline__name{
  margin:6px 0 0;
  font-size:16px;
  font-weight:700;
  color:var(--fg);
}
.page-about .about-timeline__text{
  margin:0;
  font-size:14px;
  line-height:1.78;
  color:var(--muted);
}

/* ---------- 六栏卡片 ---------- */
.page-about .about-cols{
  margin-top:28px;
  display:grid;
  grid-template-columns:1fr;
  gap:14px;
}
.page-about .about-col-card{
  --accent:var(--cyan);
  position:relative;
  padding:22px 20px 24px;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  display:flex;
  flex-direction:column;
  gap:10px;
  min-height:44px;
  transition:transform .24s var(--ease),border-color .24s var(--ease);
}
.page-about .about-col-card:hover{
  transform:translateY(-3px);
  border-color:var(--accent);
}
.page-about .about-col-card--01{--accent:var(--cyan);}
.page-about .about-col-card--02{--accent:#C7D2DE;}
.page-about .about-col-card--03{--accent:var(--blue);}
.page-about .about-col-card--04{--accent:var(--amber);}
.page-about .about-col-card--05{--accent:var(--magenta);}
.page-about .about-col-card--06{--accent:var(--mint);}
.page-about .about-col-card__idx{
  align-self:flex-start;
  padding:3px 11px;
  border:1px solid var(--accent);
  border-radius:999px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:700;
  letter-spacing:.08em;
  color:var(--accent);
}
.page-about .about-col-card__name{
  margin:0;
  font-family:var(--font-display);
  font-size:19px;
  font-weight:700;
  letter-spacing:-0.01em;
  color:var(--fg);
}
.page-about .about-col-card__desc{
  margin:0;
  font-size:14px;
  line-height:1.75;
  color:var(--muted);
}

/* ---------- 团队 ---------- */
.page-about .about-roles__media{
  margin:30px 0 0;
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  overflow:hidden;
  background:var(--panel-2);
}
.page-about .about-roles__media img{
  display:block;
  width:100%;
  height:auto;
  max-width:100%;
  object-fit:cover;
  aspect-ratio:3/2;
}
.page-about .about-roles{
  margin-top:20px;
  display:grid;
  grid-template-columns:1fr;
  gap:14px;
}
.page-about .about-role{
  padding:22px 20px;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  transition:transform .24s var(--ease),border-color .24s var(--ease);
}
.page-about .about-role:hover{
  transform:translateY(-3px);
  border-color:rgba(56,232,255,.4);
}
.page-about .about-role__n{
  margin:0;
  font-size:38px;
  font-weight:700;
  line-height:1;
  letter-spacing:-0.04em;
  color:var(--cyan);
}
.page-about .about-role__name{
  margin:12px 0 0;
  font-size:17px;
  font-weight:700;
  color:var(--fg);
}
.page-about .about-role__desc{
  margin:8px 0 0;
  font-size:14px;
  line-height:1.78;
  color:var(--muted);
}

/* ---------- 复核 ---------- */
.page-about .about-audit{margin-top:30px;}
.page-about .about-audit__bar{
  display:flex;
  justify-content:space-between;
  align-items:center;
  height:2px;
  border-radius:999px;
  background:var(--line);
  margin-bottom:26px;
}
.page-about .about-audit__bar span{
  display:block;
  width:12px;
  height:12px;
  border-radius:50%;
  background:var(--ink);
  border:2px solid var(--cyan);
}
.page-about .about-audit__bar span:last-child{border-color:var(--mint);}
.page-about .about-audit__facts{
  list-style:none;
  margin:0;
  padding:0;
  display:grid;
  grid-template-columns:1fr;
  gap:12px;
}
.page-about .about-audit__fact{
  display:flex;
  align-items:baseline;
  gap:14px;
  padding:14px 18px;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-md);
}
.page-about .about-audit__v{
  flex:0 0 auto;
  min-width:3.4em;
  font-size:26px;
  font-weight:700;
  line-height:1.1;
  letter-spacing:-0.02em;
  color:var(--fg);
}
.page-about .about-audit__k{
  font-size:14px;
  line-height:1.7;
  color:var(--muted);
}
.page-about .about-audit__note{
  margin:20px 0 0;
  max-width:34em;
  font-size:14px;
  line-height:1.8;
  color:var(--muted);
}

/* ---------- 协作 ---------- */
.page-about .about-collab{
  margin-top:28px;
  display:grid;
  grid-template-columns:1fr;
  gap:16px;
}
.page-about .about-collab__col{
  padding:24px 22px 26px;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
}
.page-about .about-collab__col--content{border-left:2px solid var(--magenta);}
.page-about .about-collab__col--tech{border-left:2px solid var(--blue);}
.page-about .about-collab__title{
  margin:14px 0 0;
  font-family:var(--font-display);
  font-size:19px;
  font-weight:700;
  letter-spacing:-0.01em;
  color:var(--fg);
}
.page-about .about-collab__list{
  list-style:none;
  margin:16px 0 0;
  padding:0;
  display:grid;
  gap:12px;
}
.page-about .about-collab__list li{
  position:relative;
  padding-left:20px;
  font-size:14px;
  line-height:1.8;
  color:var(--muted);
}
.page-about .about-collab__list li::before{
  content:"";
  position:absolute;
  left:0;
  top:11px;
  width:8px;
  height:2px;
  border-radius:2px;
  background:var(--muted);
}

/* ---------- 承诺 ---------- */
.page-about .about-block--promise{padding-bottom:88px;}
.page-about .about-promise{
  list-style:none;
  margin:28px 0 0;
  padding:0;
  display:grid;
  gap:12px;
}
.page-about .about-promise__item{
  display:flex;
  align-items:flex-start;
  gap:12px;
  padding:15px 22px;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:999px;
  font-size:15px;
  line-height:1.65;
  color:var(--fg);
}
.page-about .about-promise__item::before{
  content:"";
  flex:0 0 auto;
  width:8px;
  height:8px;
  margin-top:8px;
  border-radius:50%;
  background:var(--mint);
  box-shadow:0 0 0 4px rgba(124,255,178,.14);
}
.page-about .about-promise__actions{
  margin-top:30px;
  display:flex;
  flex-wrap:wrap;
  gap:12px;
}

/* ---------- 响应式 ---------- */
@media (max-width:599px){
  .page-about{padding-block:56px 0;}
  .page-about .about-hero__stats{grid-template-columns:1fr;}
  .page-about .about-promise__item{border-radius:var(--r-lg);}
  .page-about .about-block{padding-block:48px;}
}

@media (min-width:760px){
  .page-about .about-hero__stats{grid-template-columns:repeat(4,minmax(0,1fr));}
  .page-about .about-cols{grid-template-columns:repeat(3,minmax(0,1fr));}
  .page-about .about-roles{grid-template-columns:repeat(3,minmax(0,1fr));}
  .page-about .about-audit__facts{grid-template-columns:repeat(2,minmax(0,1fr));}
  .page-about .about-collab{grid-template-columns:1fr 1fr;gap:20px;}
  .page-about .about-block{padding-block:78px;}
}

@media (min-width:1024px){
  .page-about{padding-block:84px 0;}
  .page-about .about-hero{gap:26px;}
  .page-about .about-timeline__card{flex:0 0 300px;}
  .page-about .about-promise{grid-template-columns:repeat(3,minmax(0,1fr));}
  .page-about .about-block--promise{padding-bottom:104px;}
}

@media (prefers-reduced-motion:reduce){
  .page-about .about-col-card,
  .page-about .about-role{transition:none;}
  .page-about .about-col-card:hover,
  .page-about .about-role:hover{transform:none;}
}