.ai-hero {
  overflow-x: clip;
  border-bottom: 1px solid var(--color-border);
  padding-top: 58px;
  padding-bottom: 72px;
}

.ai-hero-inner {
  display: flex;
  align-items: center;
  flex-direction: column;
  text-align: center;
}

.ai-title {
  max-width: 900px;
  margin-top: 20px;
  margin-bottom: 0;
  font-size: clamp(52px, 5.2vw, 72px);
  font-weight: 400;
}

.ai-title .no-break {
  position: relative;
  display: inline-block;
}

.ai-title .no-break::after {
  position: absolute;
  right: 0;
  bottom: 4px;
  left: 0;
  height: 7px;
  background: var(--color-accent-wash);
  content: "";
}

.ai-hero-actions {
  justify-content: center;
  margin-top: 26px;
}

.ai-lead {
  max-width: 760px;
  margin: 22px auto 0;
  color: var(--color-text-muted);
  font-size: 18px;
}

.ai-fact-row {
  justify-content: center;
  margin-top: 20px;
}

.ai-observation {
  width: 100%;
  margin-top: 48px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  padding: 18px;
  text-align: left;
}

.ai-observation-head,
.ai-observation-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.09em;
}

.ai-observation-head {
  border-bottom: 1px dashed var(--color-border);
  padding: 0 4px 14px;
}

.ai-observation-foot {
  border-top: 1px dashed var(--color-border);
  padding: 14px 4px 0;
}

.ai-path-board {
  display: grid;
  min-height: 280px;
  grid-template-columns: minmax(120px, 190px) minmax(220px, 1fr) minmax(120px, 190px);
  align-items: stretch;
  gap: 28px;
  padding: 30px 24px;
}

.ai-source-stack,
.ai-target-stack {
  display: grid;
  align-content: center;
  gap: 12px;
}

.ai-source-stack span,
.ai-target-stack span {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  background: var(--color-panel);
  padding: 9px 12px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 12px;
}

.ai-target-stack span {
  border-left-color: var(--color-accent);
  color: var(--color-text);
}

.ai-flow-field {
  position: relative;
  display: flex;
  min-height: 210px;
  align-items: center;
  justify-content: center;
}

.ai-flow-field::before,
.ai-flow-field::after {
  position: absolute;
  top: 50%;
  width: 42%;
  border-top: 1px dashed var(--color-border);
  content: "";
}

.ai-flow-field::before {
  left: 0;
}

.ai-flow-field::after {
  right: 0;
}

.ai-flow-field i {
  position: absolute;
  right: 2%;
  left: 2%;
  height: 38px;
  border-top: 1px solid var(--color-flow);
  border-radius: 50%;
}

.ai-flow-field i:nth-child(1) {
  top: 20%;
}

.ai-flow-field i:nth-child(2) {
  top: 35%;
}

.ai-flow-field i:nth-child(3) {
  bottom: 35%;
  transform: scaleY(-1);
}

.ai-flow-field i:nth-child(4) {
  bottom: 20%;
  transform: scaleY(-1);
}

.ai-flow-field b {
  position: relative;
  z-index: 2;
  display: inline-flex;
  width: 92px;
  height: 132px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-text);
  border-radius: var(--radius-pill);
  background: var(--color-panel-soft);
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 500;
}

.ai-flow-field b::after {
  position: absolute;
  right: -60px;
  width: 58px;
  border-top: 2px solid var(--color-accent);
  content: "";
}

.ai-article section[id] {
  scroll-margin-top: var(--toc-offset);
}

.ai-soft-section {
  border-block: 1px solid var(--color-border);
  background: var(--color-panel-soft);
}

.condition-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
}

.condition-card {
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel);
  padding: 30px;
}

.condition-card h3 {
  margin-bottom: 12px;
  font-size: 25px;
}

.condition-card p:last-child {
  margin-bottom: 0;
  color: var(--color-text-muted);
}

.condition-callout,
.diagnosis-callout {
  margin-top: 28px;
}

.ai-tool-table td:nth-child(1) {
  color: var(--color-accent-strong);
  font-family: var(--font-mono);
}

.table-note {
  max-width: 860px;
  margin: 18px 0 0;
  color: var(--color-text-muted);
  font-size: 14px;
}

.ai-reading-grid {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 72px;
}

.ai-reading-index {
  border-top: 2px solid var(--color-accent);
  padding-top: 16px;
}

.ai-reading-index p {
  margin-top: 8px;
  color: var(--color-text-muted);
  font-size: 14px;
}

.ai-prose {
  max-width: 820px;
}

.ai-prose h2 {
  margin-bottom: 28px;
}

.ai-prose .callout {
  margin-top: 30px;
}

.mode-comparison {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.mode-panel {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  padding: 30px;
}

.mode-panel h3 {
  margin-bottom: 16px;
  font-size: 25px;
}

.mode-panel p,
.mode-panel li {
  color: var(--color-text-muted);
}

.mode-panel ul {
  margin: 22px 0 0 1.25em;
}

.mode-panel li + li {
  margin-top: 8px;
}

.developer-list {
  border-top: 1px solid var(--color-border);
}

.developer-row {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 38px;
  border-bottom: 1px solid var(--color-border);
  padding-top: 28px;
  padding-bottom: 28px;
}

.developer-label {
  display: flex;
  align-items: center;
  gap: 10px;
}

.developer-label .status-dot {
  flex-shrink: 0;
}

.developer-row p {
  max-width: 790px;
  margin-bottom: 0;
  color: var(--color-text-muted);
}

.diagnosis-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border-top: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
}

.diagnosis-item {
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel);
  padding: 26px;
}

.diagnosis-item h3 {
  font-size: 21px;
}

.diagnosis-item p {
  margin-bottom: 0;
  color: var(--color-text-muted);
}

.routing-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 48px;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  padding: 38px;
}

.routing-copy {
  max-width: 870px;
}

.routing-copy h2 {
  font-size: clamp(32px, 3.6vw, 46px);
}

.routing-copy p {
  color: var(--color-text-muted);
}

.routing-copy p:last-child {
  margin-bottom: 0;
}

.routing-actions {
  display: grid;
  min-width: 190px;
  gap: 12px;
}

@media (max-width: 960px) {
  .ai-path-board {
    grid-template-columns: 140px minmax(180px, 1fr) 140px;
    gap: 16px;
    padding-inline: 10px;
  }

  .ai-reading-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .ai-reading-index {
    max-width: 260px;
  }

  .routing-panel {
    grid-template-columns: 1fr;
  }

  .routing-actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  .ai-hero {
    padding-top: 42px;
    padding-bottom: 56px;
  }

  .ai-title {
    font-size: clamp(32px, 9.6vw, 40px);
  }

  .ai-lead {
    font-size: 16px;
  }

  .ai-observation {
    overflow-x: auto;
    padding: 14px;
    -webkit-overflow-scrolling: touch;
  }

  .ai-observation-head,
  .ai-observation-foot,
  .ai-path-board {
    min-width: 660px;
  }

  .condition-grid,
  .mode-comparison,
  .diagnosis-grid {
    grid-template-columns: 1fr;
  }

  .developer-row {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .routing-panel {
    padding: 26px;
  }
}

@media (max-width: 520px) {
  .ai-hero-actions {
    width: 100%;
  }

  .ai-hero-actions .button {
    width: 100%;
  }

  .condition-card,
  .mode-panel,
  .diagnosis-item {
    padding: 22px;
  }

  .routing-actions {
    grid-template-columns: 1fr;
  }

  .routing-actions .button {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ai-title .no-break::after {
    transform: none;
  }
}