.ai-intro{
  padding-top:48px;
  padding-bottom:56px;
  background:linear-gradient(180deg,var(--bg-top),var(--bg-bottom));
  border-bottom:1px solid var(--border);
}
.ai-intro-grid{
  display:grid;
  grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);
  align-items:center;
  gap:64px;
}
.ai-intro-grid>*{
  min-width:0;
}
.ai-intro-copy h1{
  margin:18px 0 24px;
  letter-spacing:var(--tracking-cjk);
}
.ai-intro-lede{
  max-width:620px;
  color:var(--ink-soft);
  font-size:var(--fs-lede);
}
.ai-entry-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:28px;
}
.ai-entry-note{
  max-width:540px;
  margin:20px 0 0;
  color:var(--muted);
  font-size:var(--fs-sm);
}
.ai-scope{
  box-shadow:var(--shadow-panel);
}
.ai-scope h2{
  margin:0 0 20px;
  font-size:var(--fs-h3);
}
.ai-scope .badges{
  margin-top:24px;
}
.ai-scope-note{
  margin:22px 0 0;
  padding-top:18px;
  border-top:1px solid var(--border);
  color:var(--muted);
  font-size:var(--fs-sm);
}
.ai-handbook{
  padding-top:32px;
}
.ai-chapter{
  padding-top:32px;
  padding-bottom:48px;
}
.ai-chapter+.ai-chapter{
  border-top:1px solid var(--border);
  padding-top:56px;
}
.ai-chapter .panel h3{
  margin-top:0;
}
.ai-chapter .panel p:last-child{
  margin-bottom:0;
}
.ai-followup{
  max-width:940px;
  margin-top:32px;
}
.ai-reading{
  max-width:940px;
}
.ai-reading h3:first-child{
  margin-top:0;
}
.ai-closing{
  max-width:920px;
  margin:32px 0 0;
  padding-top:24px;
  border-top:1px solid var(--border);
  font-size:var(--fs-sm);
}
@media(max-width:980px){
  .ai-intro-grid{
    gap:32px;
    grid-template-columns:minmax(0,1fr);
  }
  .ai-intro-copy{
    max-width:760px;
  }
}
@media(max-width:768px){
  .ai-intro{
    padding-top:28px;
    padding-bottom:36px;
  }
  .ai-intro-copy h1{
    margin-top:14px;
    margin-bottom:20px;
  }
  .ai-intro-lede{
    font-size:var(--fs-body);
  }
  .ai-entry-actions{
    margin-top:22px;
  }
  .ai-chapter{
    padding-top:20px;
    padding-bottom:32px;
  }
  .ai-chapter+.ai-chapter{
    padding-top:36px;
  }
}