.ai-intro {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, .8fr);
  align-items: start;
  gap: 64px;
  padding-bottom: 32px;
}
.ai-intro h1 {
  margin-top: 28px;
}
.ai-entry-note {
  max-width: 540px;
  margin-top: 20px;
  color: var(--muted);
  font-size: 14px;
}
.ai-path {
  margin-top: 8px;
}
.ai-path-label {
  color: var(--accent-dark);
  font-size: 13px;
}
.ai-path-list {
  display: grid;
  gap: 24px;
  margin-top: 28px;
  padding-left: 0;
  list-style: none;
}
.ai-path-list li {
  padding-left: 18px;
  border-left: 2px solid var(--accent);
}
.ai-path-list strong {
  font-size: 18px;
}
.ai-path-list p {
  margin-top: 4px;
  color: var(--muted);
  font-size: 14px;
}
.ai-path-note {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}
.ai-chapter {
  display: grid;
  grid-template-columns: minmax(0, .7fr) minmax(0, 2fr);
  gap: 56px;
  padding-top: 48px;
  padding-bottom: 56px;
  border-bottom: 1px solid var(--border);
}
.ai-chapter > h2 {
  font-size: 28px;
  line-height: 1.4;
}
.ai-chapter .prose {
  width: 100%;
}
.ai-chapter .prose > h3:first-child {
  margin-top: 0;
}
.ai-chapter .prose p {
  line-height: 1.9;
}
.ai-chapter:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}
.ai-chapter .callout a {
  color: var(--accent-dark);
}
@media (max-width: 1000px) {
  .ai-intro {
    gap: 32px;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  }
  .ai-intro h1 {
    font-size: 52px;
  }
  .ai-chapter {
    grid-template-columns: minmax(0, .8fr) minmax(0, 2fr);
    gap: 32px;
  }
}
@media (max-width: 768px) {
  .ai-intro {
    grid-template-columns: minmax(0, 1fr);
  }
  .ai-intro h1 {
    font-size: 38px;
  }
  .ai-path {
    margin-top: 0;
  }
  .ai-chapter {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding-top: 32px;
    padding-bottom: 40px;
  }
}