.ai-hero{
  position:relative;
  min-height:calc(100svh - var(--header-height));
  overflow:hidden;
  border-bottom:1px solid var(--color-line);
}
.ai-hero-grid{
  display:grid;
  min-height:calc(100svh - var(--header-height));
  grid-template-columns:minmax(0,1.12fr) minmax(320px,.88fr);
  align-items:center;
  gap:clamp(2rem,6vw,6rem);
  padding-top:72px;
  padding-bottom:72px;
}
.ai-hero-copy{
  position:relative;
  z-index:2;
  max-width:720px;
}
.ai-hero-copy h1{
  max-width:11em;
  margin-top:1rem;
}
.ai-hero-lead{
  max-width:40rem;
  color:var(--color-ink-soft);
  font-size:clamp(1.05rem,1.6vw,1.22rem);
}
.ai-hero-actions{
  margin-top:1.6rem;
}
.ai-hero-decor{
  position:absolute;
  top:50%;
  right:-5%;
  width:min(58vw,820px);
  transform:translateY(-50%);
  color:var(--color-line);
  opacity:.7;
  pointer-events:none;
}
.ai-hero-decor svg{
  width:100%;
  height:auto;
}
.ai-orbit-lines,
.ai-node-lines,
.ai-core{
  fill:none;
  stroke:currentColor;
  stroke-width:1.2;
}
.ai-node-lines{
  stroke-dasharray:5 8;
}
.ai-nodes{
  fill:var(--color-accent);
  stroke:var(--color-surface);
  stroke-width:4;
}
.ai-core{
  color:var(--color-accent);
  stroke-width:1.5;
}
.ai-signal{
  position:relative;
  z-index:2;
  align-self:center;
  background:var(--color-surface);
  box-shadow:var(--shadow-raised);
}
.ai-signal h2{
  max-width:9em;
  font-size:clamp(1.7rem,3vw,2.6rem);
}
.ai-signal-list{
  display:grid;
  gap:0;
  margin:1.5rem 0 0;
}
.ai-signal-list div{
  display:grid;
  grid-template-columns:minmax(5rem,.45fr) minmax(0,1.55fr);
  gap:1rem;
  padding-top:1rem;
  padding-bottom:1rem;
  border-top:1px solid var(--color-line);
}
.ai-signal-list dt{
  color:var(--color-accent);
  font-family:var(--font-mono);
  font-size:.8rem;
  font-weight:700;
}
.ai-signal-list dd{
  margin:0;
  color:var(--color-ink-soft);
}
.tool-detail-grid{
  display:grid;
  grid-template-columns:minmax(0,1.45fr) minmax(180px,.55fr);
  align-items:center;
  gap:2rem;
}
.tool-detail-grid h3{
  margin-top:1rem;
}
.tool-detail-grid p{
  color:var(--color-ink-soft);
}
.tool-sketch{
  display:grid;
  min-height:210px;
  place-items:center;
  border:1px solid var(--color-line);
  border-radius:var(--radius-card);
  background:var(--color-surface-soft);
  color:var(--color-accent);
}
.tool-sketch svg{
  width:100%;
  max-width:280px;
  fill:none;
  stroke:currentColor;
  stroke-linecap:round;
  stroke-linejoin:round;
  stroke-width:1.8;
}
.ai-table-note{
  margin-top:1.4rem;
  margin-bottom:0;
}
.ai-compare-layout{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:1.25rem;
}
.ai-compare-panel{
  min-height:100%;
}
.ai-compare-panel h3{
  margin-top:1rem;
}
.ai-compare-panel p{
  color:var(--color-ink-soft);
}
.ai-process{
  display:grid;
  gap:1rem;
}
.ai-process-item{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:1.2rem;
  align-items:start;
  padding:1.4rem;
  border:1px solid var(--color-line);
  border-radius:var(--radius-card);
  background:var(--color-surface);
  box-shadow:var(--shadow-card);
}
.ai-process-item h3{
  margin-bottom:.4rem;
}
.ai-process-item p{
  margin-bottom:0;
  color:var(--color-ink-soft);
}
.ai-process-mark{
  display:inline-flex;
  min-width:58px;
  min-height:34px;
  align-items:center;
  justify-content:center;
  padding:.35rem .7rem;
  border-radius:var(--radius-pill);
  background:var(--color-accent);
  color:var(--color-surface);
  font-family:var(--font-mono);
  font-size:.76rem;
  font-weight:700;
}
.ai-trust-note{
  margin:1.25rem 0 0;
  padding:1.15rem 1.25rem;
  border:1px solid var(--color-line);
  border-radius:var(--radius-card);
  background:var(--color-surface);
  color:var(--color-ink-soft);
}
.ai-dev-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:1.2rem;
  margin-bottom:1.4rem;
}
.ai-dev-card{
  position:relative;
  min-height:100%;
}
.ai-dev-card::before{
  content:"";
  display:block;
  width:42px;
  height:3px;
  margin-bottom:1rem;
  border-radius:var(--radius-pill);
  background:var(--color-accent);
}
.ai-dev-card p{
  margin-bottom:0;
  color:var(--color-ink-soft);
}
.ai-choice-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:1.2rem;
}
.ai-choice-grid .panel{
  min-height:100%;
}
.ai-choice-grid p{
  margin-bottom:0;
  color:var(--color-ink-soft);
}
.ai-next{
  display:grid;
  grid-template-columns:minmax(0,1fr) auto;
  align-items:center;
  gap:2rem;
  margin-top:1.25rem;
  border-color:var(--color-accent);
}
.ai-next h3{
  margin-bottom:.35rem;
}
.ai-next p{
  margin-bottom:0;
  color:var(--color-ink-soft);
}
.ai-plan-facts{
  display:grid;
  gap:.65rem;
  margin-top:1.25rem;
  padding-top:1.25rem;
  border-top:1px solid var(--color-line);
  color:var(--color-ink-soft);
}
.ai-plan-facts p{
  margin-bottom:0;
}
.ai-plan-facts strong{
  color:var(--color-ink);
}
@media(max-width:980px){
  .ai-hero-grid{
    grid-template-columns:1fr;
    gap:1.5rem;
    padding-top:56px;
    padding-bottom:56px;
  }
  .ai-hero-copy{
    max-width:680px;
  }
  .ai-hero-decor{
    top:auto;
    right:-20%;
    bottom:-6%;
    width:90vw;
    transform:none;
    opacity:.42;
  }
  .ai-signal{
    max-width:680px;
  }
  .tool-detail-grid{
    grid-template-columns:1fr;
  }
  .tool-sketch{
    min-height:170px;
  }
  .ai-dev-grid{
    grid-template-columns:1fr;
  }
}
@media(max-width:768px){
  .ai-hero{
    min-height:auto;
  }
  .ai-hero-grid{
    min-height:auto;
    padding-top:44px;
    padding-bottom:44px;
  }
  .ai-hero-decor{
    display:none;
  }
  .ai-signal h2{
    max-width:none;
  }
  .ai-compare-layout,
  .ai-choice-grid{
    grid-template-columns:1fr;
  }
  .ai-next{
    grid-template-columns:1fr;
  }
}
@media(max-width:640px){
  .ai-hero-grid{
    padding-top:36px;
    padding-bottom:36px;
  }
  .ai-signal-list div{
    grid-template-columns:1fr;
    gap:.35rem;
  }
  .ai-process-item{
    grid-template-columns:1fr;
  }
  .tool-sketch{
    min-height:140px;
  }
  .ai-next .button-row{
    width:100%;
  }
}