.ai-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--color-line);
  background:
    radial-gradient(circle at 78% 24%, var(--color-accent-soft), transparent 26%),
    linear-gradient(to bottom, var(--color-surface), var(--color-canvas));
}

.ai-hero::before {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-shadow-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-shadow-soft) 1px, transparent 1px);
  background-size: 44px 44px;
  content: "";
  pointer-events: none;
}

.ai-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(360px, .96fr);
  gap: clamp(40px, 7vw, 90px);
  align-items: center;
  min-height: 690px;
  padding-top: clamp(72px, 9vw, 112px);
  padding-bottom: clamp(72px, 9vw, 112px);
}

.ai-hero-copy {
  position: relative;
  z-index: 2;
}

.ai-hero h1 {
  max-width: 760px;
  margin-top: 22px;
  margin-bottom: 24px;
  font-size: clamp(52px, 5.5vw, 72px);
}

.ai-hero .lead {
  max-width: 690px;
  margin-bottom: 0;
}

.ai-hero-actions {
  justify-content: flex-start;
}

.ai-hero .fact-row {
  justify-content: flex-start;
}

.ai-console {
  position: relative;
  z-index: 1;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-lift);
}

.ai-console::before {
  position: absolute;
  top: 54px;
  right: -80px;
  width: 220px;
  height: 220px;
  border-radius: var(--radius-pill);
  background: var(--color-accent-soft);
  content: "";
  filter: blur(28px);
  pointer-events: none;
}

.ai-console-bar {
  position: relative;
  display: flex;
  min-height: 48px;
  align-items: center;
  gap: 7px;
  padding: 0 18px;
  border-bottom: 1px solid var(--color-line);
  background: var(--color-surface-soft);
}

.ai-console-bar span {
  width: 9px;
  height: 9px;
  border-radius: var(--radius-pill);
  background: var(--color-line);
}

.ai-console-bar span:nth-child(2) {
  background: var(--color-accent);
}

.ai-console-bar strong {
  margin-left: auto;
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 650;
}

.ai-console-body {
  position: relative;
  padding: clamp(24px, 4vw, 40px);
}

.ai-console-heading {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 750;
}

.ai-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 80px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  margin-top: 30px;
}

.ai-flow-source,
.ai-flow-target {
  display: grid;
  gap: 9px;
}

.ai-flow-source span,
.ai-flow-target span {
  display: flex;
  min-height: 42px;
  align-items: center;
  padding: 8px 12px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-xs);
  background: var(--color-surface);
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.ai-flow-source span {
  justify-content: flex-end;
}

.ai-flow-target span {
  color: var(--color-ink);
  font-weight: 700;
}

.ai-flow-rail {
  position: relative;
  height: 2px;
  background: var(--color-ribbon);
}

.ai-flow-rail::before,
.ai-flow-rail::after {
  position: absolute;
  top: -40px;
  bottom: -40px;
  left: 50%;
  width: 1px;
  background: var(--color-ribbon);
  content: "";
}

.ai-flow-knot {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 22px;
  height: 22px;
  border: 5px solid var(--color-accent);
  border-radius: var(--radius-xs);
  background: var(--color-surface);
  box-shadow: 0 0 24px var(--color-accent-glow);
  transform: translate(-50%, -50%) rotate(45deg);
}

.ai-console-note {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--color-line);
}

.ai-console-note span {
  padding: 5px 10px;
  border-radius: var(--radius-pill);
  background: var(--color-surface-soft);
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 10px;
}

.ai-guide {
  padding-top: clamp(54px, 8vw, 92px);
  padding-bottom: var(--section-space);
}

.ai-section {
  padding-top: clamp(54px, 7vw, 90px);
  padding-bottom: clamp(54px, 7vw, 90px);
  border-bottom: 1px solid var(--color-line);
}

.ai-section:last-of-type {
  border-bottom: 0;
}

.ai-principle-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-line);
  gap: 1px;
}

.ai-principle {
  min-width: 0;
  padding: clamp(24px, 4vw, 38px);
  background: var(--color-surface);
}

.ai-principle h3 {
  position: relative;
  padding-top: 18px;
  font-size: 21px;
}

.ai-principle h3::before {
  position: absolute;
  top: 0;
  left: 0;
  width: 32px;
  height: 3px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  content: "";
}

.ai-principle p {
  margin-bottom: 0;
  color: var(--color-muted);
}

.ai-table-note {
  margin: 18px 0 0;
  color: var(--color-muted);
  font-size: 13px;
}

.ai-copy-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(28px, 5vw, 64px);
}

.ai-copy-grid > div {
  min-width: 0;
}

.ai-copy-grid p,
.ai-layer-list p,
.ai-dev-board p,
.ai-routing p {
  color: var(--color-muted);
}

.ai-layer-list {
  display: grid;
  border-top: 1px solid var(--color-line);
}

.ai-layer-list article {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: clamp(22px, 5vw, 58px);
  padding-top: 30px;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--color-line);
}

.ai-layer-list article:last-child {
  border-bottom: 0;
}

.ai-layer-list h3 {
  font-size: 22px;
}

.ai-layer-list p {
  margin-bottom: 0;
}

.ai-layer-label {
  padding-top: 5px;
  color: var(--color-accent-strong);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .12em;
}

.ai-dev-board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--surface);
}

.ai-dev-board article {
  min-width: 0;
  padding: clamp(24px, 4vw, 38px);
  background: var(--color-surface);
}

.ai-dev-board article:nth-child(odd) {
  border-right: 1px solid var(--color-line);
}

.ai-dev-board article:nth-child(-n+2) {
  border-bottom: 1px solid var(--color-line);
}

.ai-dev-board p {
  margin-bottom: 0;
}

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

.ai-routing > div {
  min-width: 0;
  padding: clamp(22px, 4vw, 34px);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
}

.ai-routing h3 {
  font-size: 20px;
}

.ai-routing p {
  margin-bottom: 0;
}

.ai-choice-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 36px;
  align-items: center;
  margin-top: 36px;
  padding: clamp(26px, 5vw, 46px);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-surface-soft);
}

.ai-choice-panel h3 {
  font-size: 24px;
}

.ai-choice-panel p {
  color: var(--color-muted);
}

.ai-choice-panel p:last-child {
  margin-bottom: 0;
}

.ai-choice-actions {
  display: grid;
  gap: 10px;
  min-width: 144px;
}

@media (max-width: 960px) {
  .ai-hero-grid {
    grid-template-columns: minmax(0, 1fr);
    min-height: 0;
  }

  .ai-console {
    width: min(680px, 100%);
    margin-inline: auto;
  }

  .ai-choice-panel {
    grid-template-columns: minmax(0, 1fr);
  }

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

@media (max-width: 700px) {
  .ai-hero::before {
    background-size: 34px 34px;
  }

  .ai-hero-grid {
    gap: 46px;
    padding-top: 58px;
    padding-bottom: 64px;
  }

  .ai-hero h1 {
    font-size: clamp(28px, 10vw, 40px);
  }

  .ai-hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

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

  .ai-flow {
    grid-template-columns: minmax(0, 1fr) 34px minmax(0, 1fr);
    gap: 7px;
  }

  .ai-flow-source span,
  .ai-flow-target span {
    min-height: 38px;
    padding: 7px;
    font-size: 9px;
  }

  .ai-console-note {
    gap: 6px;
  }

  .ai-principle-grid,
  .ai-copy-grid,
  .ai-dev-board,
  .ai-routing {
    grid-template-columns: minmax(0, 1fr);
  }

  .ai-dev-board article:nth-child(odd) {
    border-right: 0;
  }

  .ai-dev-board article:nth-child(-n+3) {
    border-bottom: 1px solid var(--color-line);
  }

  .ai-layer-list article {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

  .ai-choice-actions {
    grid-template-columns: minmax(0, 1fr);
  }

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