.toc-wrap {
    max-width: 560px;
    margin: 1.5em 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
    border: 1px solid #e8e4dc;
    border-radius: 10px;
    overflow: hidden;
    background-color: #ffffff;
    box-shadow: 0 1px 3px rgba(45, 106, 93, 0.07);
  }
  .toc-head { background-color: #2d6a5d; padding: 14px 20px; }
  .toc-head span { color: #ffffff; font-size: 13px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase; }
  .toc-list { padding: 8px 0; }
  .toc-list a {
    display: flex;
    align-items: flex-start;
    text-decoration: none;
    line-height: 1.4;
    border-left: 3px solid transparent;
    transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
  }
  .toc-list a:hover { background-color: #f1f6f4; border-left-color: #2d6a5d; }
  .toc-list a::before {
    content: "";
    flex: 0 0 auto;
    border-radius: 50%;
    background-color: #9db8b0;
    margin-top: 0.5em;
    transition: background-color 0.15s ease;
  }
  .toc-list a:hover::before { background-color: #2d6a5d; }
  .toc-l0 { color: #2d6a5d; font-size: 15.5px; font-weight: 600; padding: 11px 20px; }
  .toc-l0::before { width: 6px; height: 6px; margin-right: 12px; }
  .toc-l0:hover { color: #1f5045; }
  .toc-l1 { color: #3f6b62; font-size: 14.5px; font-weight: 500; padding: 9px 20px 9px 40px; }
  .toc-l1::before { width: 5px; height: 5px; margin-right: 11px; background-color: #b4cabf; }
  .toc-l1:hover { color: #2d6a5d; }
  .toc-l2 { color: #51766c; font-size: 13.5px; font-weight: 400; padding: 8px 20px 8px 58px; }
  .toc-l2::before { width: 4px; height: 4px; margin-right: 10px; background-color: #c8d8d2; }
  .toc-l2:hover { color: #2d6a5d; }
  .toc-l3 { color: #5c7d74; font-size: 13px; font-weight: 500; padding: 7px 20px 7px 76px; }
  .toc-l3::before { width: 4px; height: 4px; margin-right: 10px; background-color: #c8d8d2; }
  .toc-l3:hover { color: #2d6a5d; }
  .toc-l4 { color: #5c7d74; font-size: 13px; font-weight: 400; padding: 7px 20px 7px 94px; }
  .toc-l4::before { width: 3.5px; height: 3.5px; margin-right: 10px; background-color: #cfdcd7; }
  .toc-l4:hover { color: #2d6a5d; }
  .toc-label {
    display: block;
    color: #8a9a93;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.7px;
    padding: 12px 20px 4px 58px;
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  @media (max-width: 600px) {
    .toc-wrap { max-width: 100%; }
    .toc-l1 { padding-left: 32px; }
    .toc-l2 { padding-left: 48px; }
    .toc-l3 { padding-left: 62px; }
    .toc-l4 { padding-left: 76px; }
    .toc-label { padding-left: 48px; }
  }

.idt-ai-topic {
  padding-top: 1.5rem;
  margin-top: 2.5rem;
}
.idt-ai-topic h2 {
  color: #2d4a2b;
  margin-bottom: 1.1rem;
}
.idt-ai-topic p {
  min-height: 1.3em;
}
.idt-ai-topic h3 {
  color: #2d4a2b;
  margin: 1.5em 0 0.6em;
}
.idt-ai-topic .ai-software-subheading {
  color: inherit;
  font: inherit;
  margin: 1em 0;
}
.idt-ai-topic .ai-example-intro {
  margin-bottom: 0.35em;
}
.idt-ai-topic .ai-if-examples {
  margin-top: 0.35em;
}
.idt-ai-topic[aria-labelledby="traditional-software"] {
  margin-top: 0.5rem;
  padding-top: 0;
}
.idt-ai-topic ul {
  padding-left: 1.5em;
  margin: 0.75em 0 1.25em;
}
.idt-ai-topic li {
  margin-bottom: 0.45em;
}
.idt-ai-topic .ai-timeline {
  list-style: none;
  padding-left: 0;
}
.idt-ai-topic .ai-timeline li {
  padding: 0.45em 0 0.45em 5.4em;
  position: relative;
  border-bottom: 1px solid #e8e4dc;
}
.idt-ai-topic .ai-timeline strong {
  color: #2d6a5d;
  position: absolute;
  left: 0;
}
.idt-ai-topic .ai-callout {
  background: #f1f6f4;
  border-left: 3px solid #2d6a5d;
  padding: 1em 1.25em;
  margin: 1.5em 0;
}
.idt-ai-topic .ai-callout p:last-child {
  margin-bottom: 0;
}
.idt-ai-topic .ai-cat-problem-image {
  width: 100%;
  max-width: 900px;
  margin: 1.1em 0 1.75em;
}
.idt-ai-topic .ai-cat-problem-image img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 6px;
}
.idt-ai-topic .ai-cat-problem-image figcaption {
  margin-top: 0.6em;
  color: #51766c;
  font-size: 0.9em;
}
.idt-ai-topic .ai-pullquote {
  color: #2d4a2b;
  font-size: 1.15em;
  font-style: italic;
  border-left: 3px solid #9db8b0;
  padding-left: 1em;
  margin: 1.5em 0;
}

.idt-ai-topic .ai-transformer-video,
.idt-ai-topic .ai-timeline-video {
  width: 100%;
  max-width: 860px;
  margin: 1.25em 0 1.75em;
}
.idt-ai-topic .ai-transformer-video video,
.idt-ai-topic .ai-timeline-video video {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 8px;
  background: #111;
}
.idt-ai-topic .ai-transformer-video figcaption,
.idt-ai-topic .ai-timeline-video figcaption {
  margin-top: 0.6em;
  color: #51766c;
  font-size: 0.9em;
}

.ai-jargon-guide {
  --aij-ink: #173127;
  --aij-ink-soft: #405148;
  --aij-paper: #faf9f4;
  --aij-paper-soft: #efede3;
  --aij-accent: #2d4a2b;
  --aij-accent-soft: #789070;
  --aij-rule: #c8cbbb;
  max-width: 760px;
  color: var(--aij-ink);
}
.ai-jargon-guide, .ai-jargon-guide * { box-sizing: border-box; }
.ai-jargon-guide > p { line-height: 1.65; }
.ai-jargon-guide h3 { font-size: 1.2em; }
.ai-jargon-guide .concept-map {
  margin: 28px 0;
  padding: 22px;
  background: var(--aij-paper-soft);
  border-left: 4px solid var(--aij-accent);
  border-radius: 0 4px 4px 0;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}
.ai-jargon-guide .concept-chain {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.ai-jargon-guide .concept-node,
.ai-jargon-guide .branch-node {
  background: var(--aij-paper);
  border: 1px solid var(--aij-rule);
  border-radius: 3px;
  text-align: center;
}
.ai-jargon-guide .concept-node {
  padding: 10px 12px;
  font-size: 13px;
  font-weight: 600;
}
.ai-jargon-guide .concept-node.generative {
  background: var(--aij-accent);
  border-color: var(--aij-accent);
  color: var(--aij-paper);
}
.ai-jargon-guide .concept-arrow {
  color: var(--aij-accent);
  font-size: 18px;
  font-weight: 700;
}
.ai-jargon-guide .generative-map {
  margin: 18px 0 30px;
  padding: 22px;
  background: var(--aij-paper-soft);
  border: 1px solid var(--aij-rule);
  border-radius: 4px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}
.ai-jargon-guide .generative-map-title {
  margin-bottom: 16px;
  color: var(--aij-ink-soft);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-align: center;
  text-transform: uppercase;
}
.ai-jargon-guide .branch-root {
  width: 180px;
  margin: 0 auto;
  padding: 12px 16px;
}
.ai-jargon-guide .concept-branches {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 30px;
  padding-top: 22px;
}
.ai-jargon-guide .concept-branches::before {
  content: '';
  position: absolute;
  top: 0;
  left: 12.5%;
  right: 12.5%;
  border-top: 1px solid var(--aij-accent-soft);
}
.ai-jargon-guide .concept-branches::after {
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  height: 30px;
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}
.ai-jargon-guide .branch-node {
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  font-size: 12px;
}
.ai-jargon-guide .branch-node::before {
  content: '';
  position: absolute;
  top: -23px;
  left: 50%;
  height: 22px;
  border-left: 1px solid var(--aij-accent-soft);
}
.ai-jargon-guide .branch-node strong,
.ai-jargon-guide .branch-node span { display: block; }
.ai-jargon-guide .branch-node span {
  margin-top: 3px;
  color: var(--aij-ink-soft);
  font-size: 11px;
}
.ai-jargon-guide .callout {
  margin: 24px 0;
  padding: 18px 22px;
  background: #f4f0d7;
  border: 1px solid #cfc692;
  border-radius: 4px;
}
.ai-jargon-guide .callout-title {
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--aij-accent);
  margin-bottom: 8px;
}
.ai-jargon-guide .ai-jargon-video {
  width: 100%;
  max-width: 760px;
  margin: 1.2em 0 1.6em;
}
.ai-jargon-guide .ai-jargon-video video {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 8px;
  background: #111;
}
.ai-jargon-guide .ai-jargon-video figcaption {
  margin-top: 0.6em;
  color: #51766c;
  font-size: 0.9em;
}
@media (max-width: 600px) {
  .ai-jargon-guide .concept-chain { flex-direction: column; }
  .ai-jargon-guide .concept-arrow { transform: rotate(90deg); }
  .ai-jargon-guide .concept-branches {
    grid-template-columns: 1fr;
    margin-left: 18px;
    padding: 0 0 0 18px;
    border-left: 1px solid var(--aij-accent-soft);
  }
  .ai-jargon-guide .concept-branches::before,
  .ai-jargon-guide .concept-branches::after { display: none; }
  .ai-jargon-guide .branch-node::before {
    top: 50%;
    left: -19px;
    width: 18px;
    height: 0;
    border-left: none;
    border-top: 1px solid var(--aij-accent-soft);
  }
}

.ai-ml-guide, .ai-neural-guide, .ai-scaling-guide { max-width: 760px; }
.ai-ml-guide > p, .ai-neural-guide > p, .ai-scaling-guide > p { line-height: 1.65; }
.ai-ml-guide figure, .ai-neural-guide figure, .ai-scaling-guide figure { margin: 24px 0; }
.ai-ml-guide figure img, .ai-neural-guide figure img, .ai-scaling-guide figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 4px;
}
.ai-ml-guide figcaption, .ai-neural-guide figcaption, .ai-scaling-guide figcaption {
  margin-top: 10px;
  color: #405148;
  font-size: 13px;
  font-style: italic;
  text-align: center;
}
.ai-ml-guide .pullquote,
.ai-transformer-guide .pullquote,
.ai-scaling-guide .pullquote,
.ai-training-guide .pullquote,
.ai-current-guide .pullquote {
  margin: 28px 0;
  padding: 20px 24px;
  border-left: 4px solid #2d4a2b;
  background: #efede3;
  color: #173127;
  font-size: 1.1em;
  font-style: italic;
  line-height: 1.5;
}
.ai-scaling-guide h4 {
  margin: 1.4em 0 0.6em;
  color: #173127;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 1em;
}
.ai-transformer-guide { max-width: 760px; }
.ai-transformer-guide > p { line-height: 1.65; }
.ai-transformer-guide .callout {
  margin: 24px 0;
  padding: 18px 22px;
  background: #f4f0d7;
  border: 1px solid #cfc692;
  border-radius: 4px;
}
.ai-transformer-guide .callout-title {
  margin-bottom: 8px;
  color: #2d4a2b;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}
.ai-training-guide { max-width: 760px; }
.ai-training-guide > p { line-height: 1.65; }
.ai-training-guide .callout {
  margin: 24px 0;
  padding: 18px 22px;
  background: #f4f0d7;
  border: 1px solid #cfc692;
  border-radius: 4px;
}
.ai-training-guide .callout-title {
  margin-bottom: 8px;
  color: #2d4a2b;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}
.ai-current-guide { max-width: 760px; }
.ai-current-guide > p { line-height: 1.65; }
.ai-current-guide .callout {
  margin: 24px 0;
  padding: 18px 22px;
  background: #f4f0d7;
  border: 1px solid #cfc692;
  border-radius: 4px;
}
.ai-current-guide .callout-title {
  margin-bottom: 8px;
  color: #2d4a2b;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}
.ai-current-guide .source-note {
  margin-top: 1.25em;
  color: #51766c;
  font-size: 0.85em;
  line-height: 1.5;
}
.ai-frontier-guide { max-width: 760px; }
.ai-frontier-guide > p { line-height: 1.65; }