.page-about{
  background:var(--ink-base);
  color:var(--paper);
  overflow-x:clip;
}

.page-about section[id]{
  scroll-margin-top:96px;
}

.page-about .about-crumb{
  padding-top:22px;
  padding-bottom:4px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero{
  position:relative;
  padding:24px 0 54px;
  background:
    radial-gradient(720px 400px at 86% 6%, rgba(198,255,61,.11), transparent 64%),
    radial-gradient(560px 320px at 4% 96%, rgba(57,208,200,.09), transparent 66%),
    var(--ink-base);
  border-bottom:1px solid var(--ink-line);
}

.page-about .about-hero__grid{
  display:grid;
  gap:34px;
}

.page-about .about-hero__kicker{
  display:inline-block;
  margin:0;
  padding:7px 14px;
  font-family:var(--font-data);
  font-size:12.5px;
  letter-spacing:.14em;
  color:var(--lime);
  background:rgba(20,48,41,.72);
  border:1px solid var(--ink-line);
  clip-path:polygon(10px 0,100% 0,100% 100%,0 100%,0 10px);
}

.page-about .about-hero h1{
  margin:20px 0 0;
  font-family:var(--font-display);
  font-weight:900;
  font-size:clamp(30px,7vw,54px);
  line-height:1.1;
  letter-spacing:-.02em;
  color:var(--paper);
}

.page-about .about-hero__lede{
  margin-top:18px;
  max-width:38em;
  color:var(--sage);
}

.page-about .about-hero__stats{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:1px;
  margin-top:30px;
  background:var(--ink-line);
  border:1px solid var(--ink-line);
}

.page-about .about-stat{
  padding:15px 16px 17px;
  background:var(--ink-panel);
}

.page-about .about-stat__v{
  display:block;
  font-family:var(--font-data);
  font-size:clamp(22px,4.4vw,30px);
  font-weight:700;
  line-height:1.1;
  color:var(--lime);
  font-variant-numeric:tabular-nums;
}

.page-about .about-stat__l{
  display:block;
  margin-top:7px;
  font-size:13px;
  line-height:1.5;
  color:var(--sage);
}

.page-about .about-hero__visual{
  border:1px solid var(--ink-line);
  background:linear-gradient(160deg, rgba(20,48,41,.9), rgba(10,29,24,.6));
  padding:14px;
  clip-path:polygon(14px 0,100% 0,100% 100%,0 100%,0 14px);
}

.page-about .about-signal{
  display:block;
  width:100%;
  height:auto;
}

/* ---------- 窄栏叙事 ---------- */
.page-about .about-narrow{
  max-width:768px;
}

.page-about .about-origin__prose{
  margin-top:22px;
}

/* ---------- 团队 ---------- */
.page-about .about-team__media{
  margin:26px 0 0;
}

.page-about .about-team__cards{
  display:grid;
  gap:18px;
  margin-top:28px;
}

.page-about .about-card{
  display:flex;
  flex-direction:column;
  gap:10px;
  padding:22px 20px 24px;
  background:var(--ink-panel);
  border:1px solid var(--ink-line);
  clip-path:polygon(var(--cut) 0,100% 0,100% 100%,0 100%,0 var(--cut));
  transition:border-color .2s ease, background .2s ease;
}

.page-about .about-card:hover,
.page-about .about-card:focus-within{
  border-color:var(--lime);
  background:#173a31;
}

.page-about .about-card__code{
  font-family:var(--font-data);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--amber);
}

.page-about .about-card__name{
  margin:0;
  font-family:var(--font-display);
  font-weight:900;
  font-size:20px;
  letter-spacing:-.01em;
  color:var(--paper);
}

.page-about .about-card__size{
  margin:0;
  font-family:var(--font-data);
  font-size:13px;
  color:var(--lime);
}

.page-about .about-card__size .sy-num{
  font-size:20px;
  font-weight:700;
}

.page-about .about-card__desc{
  margin:0;
  font-size:15px;
  line-height:1.72;
  color:var(--sage);
}

.page-about .about-card__tags{
  display:flex;
  flex-wrap:wrap;
  gap:6px;
  margin:auto 0 0;
  padding:0;
  list-style:none;
}

/* ---------- 维护流程 ---------- */
.page-about .about-steps{
  display:grid;
  gap:18px;
  margin:28px 0 0;
  padding:0;
  list-style:none;
}

.page-about .about-step{
  position:relative;
  display:grid;
  grid-template-columns:52px minmax(0,1fr);
  gap:14px;
  align-items:start;
}

.page-about .about-step__dot{
  display:grid;
  place-items:center;
  width:52px;
  height:52px;
  font-family:var(--font-data);
  font-size:15px;
  font-weight:700;
  color:var(--lime);
  background:var(--ink-panel);
  border:1px solid var(--lime);
  clip-path:polygon(12px 0,100% 0,100% 100%,0 100%,0 12px);
}

.page-about .about-step__title{
  margin:0 0 6px;
  font-family:var(--font-display);
  font-weight:900;
  font-size:18px;
  color:var(--paper);
}

.page-about .about-step__text{
  margin:0;
  font-size:15px;
  line-height:1.7;
  color:var(--sage);
}

.page-about .about-flow__lower{
  display:grid;
  gap:24px;
  margin-top:38px;
}

.page-about .about-flow__text{
  padding:26px 24px 28px;
  background:var(--paper);
  color:var(--black);
  clip-path:polygon(var(--cut) 0,100% 0,100% 100%,0 100%,0 var(--cut));
}

.page-about .about-flow__text h3{
  margin:0 0 12px;
  font-family:var(--font-display);
  font-weight:900;
  font-size:22px;
  letter-spacing:-.01em;
  color:var(--black);
}

.page-about .about-flow__text p{
  margin:0;
  font-size:16px;
  line-height:1.75;
  color:var(--black);
}

.page-about .about-flow__list{
  display:grid;
  gap:12px;
  margin:16px 0 0;
  padding:0;
  list-style:none;
}

.page-about .about-flow__list li{
  padding-left:14px;
  border-left:3px solid var(--lime);
  font-size:15px;
  line-height:1.7;
  color:var(--black);
}

.page-about .about-flow__figure{
  margin:0;
  padding:10px;
  background:var(--ink-panel);
  border:1px solid var(--ink-line);
  clip-path:polygon(var(--cut-lg) 0,100% 0,100% 100%,0 100%,0 var(--cut-lg));
}

.page-about .about-flow__figure img{
  display:block;
  width:100%;
  height:auto;
  aspect-ratio:1 / 1;
  object-fit:cover;
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline{
  position:relative;
  padding:60px 0 68px;
  background:var(--ink-panel);
  border-top:1px solid var(--ink-line);
  border-bottom:1px solid var(--ink-line);
  overflow:hidden;
}

.page-about .about-timeline__bg{
  position:absolute;
  inset:0;
  z-index:0;
  opacity:.2;
}

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

.page-about .about-timeline::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  background:linear-gradient(180deg, rgba(10,29,24,.74) 0%, rgba(20,48,41,.9) 52%, rgba(10,29,24,.9) 100%);
}

.page-about .about-timeline__inner{
  position:relative;
  z-index:2;
}

.page-about .about-tl{
  position:relative;
  display:grid;
  gap:24px;
  margin:30px 0 0;
  padding:0;
  list-style:none;
}

.page-about .about-tl__node{
  position:relative;
  padding-top:26px;
}

.page-about .about-tl__mark{
  position:absolute;
  top:0;
  left:0;
  width:14px;
  height:14px;
  background:var(--lime);
  clip-path:polygon(50% 0,100% 50%,50% 100%,0 50%);
}

.page-about .about-tl__code{
  display:inline-block;
  margin-bottom:10px;
  padding:3px 9px;
  font-family:var(--font-data);
  font-size:12px;
  letter-spacing:.1em;
  color:var(--amber);
  border:1px solid rgba(255,194,75,.5);
  clip-path:polygon(7px 0,100% 0,100% 100%,0 100%,0 7px);
}

.page-about .about-tl__title{
  margin:0 0 8px;
  font-family:var(--font-display);
  font-weight:900;
  font-size:19px;
  letter-spacing:-.01em;
  color:var(--paper);
}

.page-about .about-tl__text{
  margin:0;
  font-size:15px;
  line-height:1.72;
  color:var(--sage);
}

/* ---------- 三件在意的事 ---------- */
.page-about .about-values__grid{
  display:grid;
  gap:18px;
  margin-top:28px;
}

.page-about .about-value{
  padding:24px 22px 26px;
  background:var(--ink-panel);
  border:1px solid var(--ink-line);
  border-top:3px solid var(--lime);
  clip-path:polygon(var(--cut) 0,100% 0,100% 100%,0 100%,0 var(--cut));
}

.page-about .about-value__key{
  display:block;
  margin-bottom:12px;
  font-family:var(--font-data);
  font-size:12px;
  letter-spacing:.2em;
  color:var(--cyan);
}

.page-about .about-value h3{
  margin:0 0 10px;
  font-family:var(--font-display);
  font-weight:900;
  font-size:21px;
  letter-spacing:-.01em;
  color:var(--paper);
}

.page-about .about-value p{
  margin:0;
  font-size:15.5px;
  line-height:1.78;
  color:var(--sage);
}

/* ---------- 合作 ---------- */
.page-about .about-partner__box{
  padding:32px 22px 34px;
  background:linear-gradient(150deg, rgba(20,48,41,.95), rgba(10,29,24,.85));
  border:1px solid var(--ink-line);
  clip-path:polygon(var(--cut) 0,100% 0,100% 100%,0 100%,0 var(--cut));
}

.page-about .about-partner__body{
  margin-top:22px;
  max-width:62ch;
}

.page-about .about-partner__body p{
  margin:0 0 14px;
  font-size:16px;
  line-height:1.78;
  color:var(--sage);
}

.page-about .about-partner__actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:24px;
}

.page-about .about-partner__links{
  display:flex;
  flex-wrap:wrap;
  gap:10px 26px;
  margin:26px 0 0;
  padding:20px 0 0;
  list-style:none;
  border-top:1px solid var(--ink-line);
}

.page-about .about-partner__links a{
  font-size:14.5px;
  color:var(--lime-glow);
  text-decoration:none;
  border-bottom:1px solid rgba(228,255,154,.35);
  padding-bottom:2px;
}

.page-about .about-partner__links a:hover,
.page-about .about-partner__links a:focus-visible{
  color:var(--lime);
  border-bottom-color:var(--lime);
}

.page-about a:focus-visible,
.page-about .about-card:focus-within{
  outline:2px solid var(--lime-glow);
  outline-offset:3px;
}

/* ---------- 响应式 ---------- */
@media (min-width:640px){
  .page-about .about-hero__stats{
    grid-template-columns:repeat(4,minmax(0,1fr));
  }
  .page-about .about-team__cards{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
  .page-about .about-values__grid{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
}

@media (min-width:900px){
  .page-about .about-hero{
    padding:36px 0 70px;
  }
  .page-about .about-hero__grid{
    grid-template-columns:minmax(0,7fr) minmax(0,5fr);
    align-items:end;
    gap:48px;
  }
  .page-about .about-flow__lower{
    grid-template-columns:minmax(0,7fr) minmax(0,5fr);
    align-items:start;
    gap:32px;
  }
  .page-about .about-partner__box{
    padding:40px 38px 42px;
  }
}

@media (min-width:1024px){
  .page-about .about-team__cards{
    grid-template-columns:repeat(4,minmax(0,1fr));
    gap:18px;
    padding-bottom:26px;
  }
  .page-about .about-team__cards > article:nth-child(even){
    margin-top:30px;
  }
  .page-about .about-values__grid{
    grid-template-columns:repeat(3,minmax(0,1fr));
  }
}

@media (min-width:880px){
  .page-about .about-steps{
    grid-template-columns:repeat(4,minmax(0,1fr));
    gap:0;
    position:relative;
  }
  .page-about .about-steps::before{
    content:"";
    position:absolute;
    left:0;
    right:0;
    top:26px;
    height:1px;
    background:linear-gradient(90deg, rgba(198,255,61,.85), rgba(198,255,61,.12));
  }
  .page-about .about-step{
    display:block;
    padding:0 20px 0 0;
  }
  .page-about .about-step__dot{
    position:relative;
    z-index:1;
    margin-bottom:16px;
  }
  .page-about .about-tl{
    grid-template-columns:repeat(4,minmax(0,1fr));
    gap:0;
  }
  .page-about .about-tl::before{
    content:"";
    position:absolute;
    left:0;
    right:0;
    top:7px;
    height:2px;
    background:linear-gradient(90deg, rgba(198,255,61,.9), rgba(198,255,61,.12));
  }
  .page-about .about-tl__node{
    padding:28px 24px 0 0;
  }
}

@media (prefers-reduced-motion: reduce){
  .page-about .about-card,
  .page-about .about-partner__links a{
    transition:none;
  }
}