.ai-hero{
  position:relative;
  min-height:calc(100svh - var(--header-height));
  display:flex;
  align-items:center;
  padding-top:clamp(54px,7vw,92px);
  padding-bottom:clamp(64px,8vw,108px);
  overflow:hidden;
}
.ai-hero::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background:
    radial-gradient(circle at 78% 34%,var(--color-glow-warm),transparent 38%),
    radial-gradient(circle at 17% 82%,var(--color-glow-accent),transparent 34%);
}
.ai-hero-glow{
  position:absolute;
  top:12%;
  right:4%;
  width:min(46vw,620px);
  aspect-ratio:1;
  border-radius:50%;
  border:1px dashed var(--color-border);
  opacity:.56;
  pointer-events:none;
}
.ai-hero-glow::before,
.ai-hero-glow::after{
  content:"";
  position:absolute;
  border-radius:50%;
  border:1px solid var(--color-border);
}
.ai-hero-glow::before{inset:14%}
.ai-hero-glow::after{inset:31%;background:var(--color-glow-accent)}
.ai-hero-grid{
  position:relative;
  z-index:1;
  display:grid;
  grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);
  gap:clamp(38px,6vw,82px);
  align-items:center;
}
.ai-hero-copy{max-width:620px}
.ai-hero-copy h1{margin:20px 0 22px}
.ai-hero-copy .lead{font-size:clamp(17px,1.7vw,20px)}
.ai-trust-list{
  display:flex;
  flex-wrap:wrap;
  gap:8px 20px;
  margin:26px 0 8px;
  padding:0;
  color:var(--color-muted);
  font-size:13px;
  list-style:none;
}
.ai-trust-list li{display:inline-flex;align-items:center;gap:6px}
.ai-signup-note{margin:8px 0 0;color:var(--color-muted);font-size:13px}
.ai-workbench{
  position:relative;
  width:100%;
  border:1px solid var(--color-border);
  border-radius:var(--radius-xl);
  background:var(--color-panel);
  box-shadow:var(--shadow-card);
  transform:rotate(-1.5deg);
}
.ai-workbench-top{
  display:flex;
  min-height:54px;
  align-items:center;
  gap:8px;
  padding:12px 18px;
  border-bottom:1px solid var(--color-border);
}
.ai-workbench-top strong{margin-left:8px;font-size:13px}
.ai-workbench-state{
  display:inline-flex;
  align-items:center;
  gap:7px;
  margin-left:auto;
  color:var(--color-success);
  font-size:12px;
  font-weight:700;
}
.ai-workbench-state i{
  width:7px;
  height:7px;
  flex-shrink:0;
  border-radius:50%;
  background:var(--color-success);
}
.ai-workbench-body{
  display:grid;
  grid-template-columns:150px minmax(0,1fr);
  min-height:420px;
}
.ai-tool-rail{
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:18px 12px;
  border-right:1px solid var(--color-border);
  border-radius:0 0 0 var(--radius-xl);
  background:var(--color-panel-alt);
}
.ai-rail-label{
  margin:0 8px 8px;
  color:var(--color-muted);
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.12em;
}
.ai-tool-item{
  position:relative;
  padding:9px 11px;
  border-radius:var(--radius-xs);
  color:var(--color-muted);
  font-size:12px;
}
.ai-tool-item.is-current{
  background:var(--color-panel);
  color:var(--color-accent);
  font-weight:800;
  box-shadow:inset 3px 0 0 var(--color-accent);
}
.ai-request-panel{
  display:flex;
  min-width:0;
  flex-direction:column;
  padding:clamp(22px,4vw,36px);
}
.ai-path-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  color:var(--color-muted);
  font-size:12px;
}
.ai-path-chip{
  padding:4px 10px;
  border-radius:var(--radius-pill);
  background:var(--color-accent-soft);
  color:var(--color-accent);
  font-weight:700;
}
.ai-path{
  display:flex;
  align-items:center;
  justify-content:center;
  margin:42px 0 36px;
}
.ai-path-node{
  display:grid;
  width:58px;
  height:58px;
  flex-shrink:0;
  place-items:center;
  border:1px solid var(--color-border);
  border-radius:50%;
  background:var(--color-panel-alt);
  color:var(--color-muted);
}
.ai-path-node.is-accent{
  background:var(--color-accent);
  color:var(--color-white);
  box-shadow:var(--shadow-button);
}
.ai-path-line{
  width:clamp(26px,5vw,64px);
  height:1px;
  border-top:1px dashed var(--color-border);
}
.ai-request-facts{display:grid;gap:10px}
.ai-request-facts div{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:18px;
  padding-bottom:10px;
  border-bottom:1px solid var(--color-border);
}
.ai-request-facts span{color:var(--color-muted);font-size:11px}
.ai-request-facts strong{text-align:right;font-size:12px}
.ai-plan-strip{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:16px;
  margin-top:auto;
  padding:13px 15px;
  border-radius:var(--radius-sm);
  background:var(--color-panel-alt);
  font-size:11px;
}
.ai-plan-strip span{color:var(--color-muted)}
.ai-plan-strip strong{text-align:right}
.ai-float-note{
  position:absolute;
  right:-18px;
  bottom:-26px;
  display:flex;
  align-items:center;
  gap:10px;
  padding:13px 16px;
  border:1px solid var(--color-border);
  border-radius:var(--radius-md);
  background:var(--color-panel);
  box-shadow:var(--shadow-float);
  transform:rotate(2deg);
}
.ai-float-note strong,
.ai-float-note small{display:block}
.ai-float-note strong{font-size:13px}
.ai-float-note small{color:var(--color-muted);font-size:11px}
.section-heading{max-width:790px;margin-bottom:38px}
.section-heading h2{margin-bottom:16px}
.section-heading>p:last-child{color:var(--color-muted)}
.ai-principles{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  border:1px solid var(--color-border);
  border-radius:var(--radius-xl);
  background:var(--color-panel);
  box-shadow:0 18px 38px -34px var(--color-shadow-heavy);
}
.ai-principle{
  min-width:0;
  padding:clamp(24px,3.5vw,38px);
}
.ai-principle+.ai-principle{border-left:1px solid var(--color-border)}
.ai-principle-mark,
.ai-dev-label{
  display:inline-block;
  margin-bottom:20px;
  color:var(--color-accent);
  font-family:var(--font-mono);
  font-size:11px;
  font-weight:800;
  letter-spacing:.12em;
}
.ai-principle h3{font-size:22px}
.ai-principle p{margin:0;color:var(--color-muted)}
.ai-table-section{background:var(--color-panel-alt)}
.ai-compare-table{min-width:880px}
.ai-compare-table td:first-child{color:var(--color-accent)}
.ai-compare-table td{vertical-align:top}
.ai-reading-grid{
  display:grid;
  grid-template-columns:minmax(240px,.72fr) minmax(0,1.28fr);
  gap:clamp(34px,6vw,80px);
  align-items:start;
}
.ai-reading-intro{
  position:sticky;
  top:calc(var(--header-height) + 28px);
}
.ai-reading-intro p:last-child{color:var(--color-muted)}
.ai-reading-body{display:grid;gap:14px}
.ai-note-card{
  padding:clamp(22px,3vw,30px);
  border:1px solid var(--color-border);
  border-radius:var(--radius-lg);
  background:var(--color-panel);
}
.ai-note-card h3{margin-bottom:8px;font-size:20px}
.ai-note-card p{margin:0;color:var(--color-muted)}
.ai-split-section{background:var(--color-panel-alt)}
.ai-channel-grid{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:20px;
}
.ai-channel-card{
  min-width:0;
  padding:clamp(25px,4vw,40px);
  border:1px solid var(--color-border);
  border-radius:var(--radius-xl);
  background:var(--color-panel);
}
.ai-channel-head{
  display:flex;
  align-items:center;
  gap:14px;
  margin-bottom:18px;
}
.ai-channel-head h3{margin:0}
.ai-channel-icon{
  display:grid;
  width:48px;
  height:48px;
  flex-shrink:0;
  place-items:center;
  border-radius:var(--radius-sm);
  background:var(--color-accent-soft);
  color:var(--color-accent);
}
.ai-channel-card p,
.ai-channel-card li{color:var(--color-muted)}
.ai-channel-card ul{margin-bottom:0}
.ai-dev-layout{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:16px;
}
.ai-dev-card{
  min-width:0;
  padding:clamp(22px,3vw,32px);
  border-top:4px solid var(--color-accent);
  border-radius:var(--radius-md);
  background:var(--color-panel);
  box-shadow:0 14px 28px -28px var(--color-shadow-heavy);
}
.ai-dev-card h3{font-size:21px}
.ai-dev-card p{margin:0;color:var(--color-muted)}
.ai-symptom-section{background:var(--color-panel-alt)}
.ai-symptom-list{
  border-top:1px solid var(--color-border);
}
.ai-symptom-list article{
  display:grid;
  grid-template-columns:minmax(220px,.7fr) minmax(0,1.3fr);
  gap:clamp(24px,5vw,70px);
  padding:28px 0;
  border-bottom:1px solid var(--color-border);
}
.ai-symptom-list h3{margin:9px 0 0;font-size:20px}
.ai-symptom-list p{margin:0;color:var(--color-muted)}
.ai-symptom-tag{
  display:inline-flex;
  padding:4px 10px;
  border-radius:var(--radius-pill);
  background:var(--color-accent-soft);
  color:var(--color-accent);
  font-size:11px;
  font-weight:800;
}
.ai-selection-panel{
  display:grid;
  grid-template-columns:minmax(0,1.25fr) minmax(280px,.75fr);
  gap:clamp(28px,5vw,64px);
  align-items:center;
  padding:clamp(26px,5vw,54px);
  border:1px solid var(--color-border);
  border-radius:var(--radius-xl);
  background:var(--color-panel);
  box-shadow:var(--shadow-card);
}
.ai-selection-copy p:not(.eyebrow){color:var(--color-muted)}
.ai-fact-card{
  padding:24px;
  border-radius:var(--radius-lg);
  background:var(--color-panel-alt);
}
.ai-fact-card dl{margin:22px 0 0}
.ai-fact-card dl div{
  display:grid;
  grid-template-columns:auto minmax(0,1fr);
  gap:18px;
  padding:11px 0;
  border-bottom:1px solid var(--color-border);
}
.ai-fact-card dl div:last-child{border-bottom:0}
.ai-fact-card dt{color:var(--color-muted);font-size:12px}
.ai-fact-card dd{margin:0;text-align:right;font-weight:700}
@media (max-width:1120px){
  .ai-hero{min-height:auto}
  .ai-hero-grid{grid-template-columns:1fr}
  .ai-hero-copy{max-width:760px}
  .ai-workbench{max-width:720px;margin-inline:auto}
  .ai-dev-layout{grid-template-columns:1fr}
}
@media (max-width:900px){
  .ai-principles{grid-template-columns:1fr}
  .ai-principle+.ai-principle{border-left:0;border-top:1px solid var(--color-border)}
  .ai-reading-grid{grid-template-columns:1fr}
  .ai-reading-intro{position:static}
  .ai-channel-grid{grid-template-columns:1fr}
  .ai-selection-panel{grid-template-columns:1fr}
}
@media (max-width:768px){
  .ai-hero-glow{display:none}
  .ai-workbench{transform:none}
  .ai-workbench-body{grid-template-columns:1fr;min-height:auto}
  .ai-tool-rail{display:none}
  .ai-request-panel{min-height:390px}
  .ai-float-note{position:relative;right:auto;bottom:auto;margin:14px;transform:none}
  .ai-symptom-list article{grid-template-columns:1fr;gap:14px}
}
@media (max-width:520px){
  .ai-path-node{width:48px;height:48px}
  .ai-request-facts div,
  .ai-plan-strip{display:block}
  .ai-request-facts strong,
  .ai-plan-strip strong{display:block;margin-top:4px;text-align:left}
  .ai-selection-panel{padding:22px}
  .ai-fact-card dl div{grid-template-columns:1fr;gap:2px}
  .ai-fact-card dd{text-align:left}
}
@media (prefers-reduced-motion:reduce){
  .ai-workbench,
  .ai-float-note{transform:none}
}