.ai-page {
  position: relative;
  overflow-x: clip;
  background: var(--color-bg);
}

.ai-page::before {
  position: fixed;
  z-index: 0;
  inset: 0;
  content: '';
  opacity: .3;
  background-image: radial-gradient(color-mix(in srgb, var(--color-primary) 12%, var(--color-transparent)) 0.7px, var(--color-transparent) 0.7px);
  background-size: 9px 9px;
  pointer-events: none;
}

.ai-page > section {
  position: relative;
  z-index: 1;
}

.ai-hero {
  padding-top: 76px;
  padding-bottom: 72px;
  overflow-x: clip;
  background: linear-gradient(180deg, var(--color-hero-top), var(--color-hero-bottom));
}

.ai-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(480px, 1.1fr);
  gap: 64px;
  align-items: center;
}

.ai-hero-copy {
  display: flex;
  align-items: flex-start;
  flex-direction: column;
}

.ai-hero-title {
  max-width: 720px;
  margin: 22px 0 0;
}

.ai-hero-lede {
  max-width: 650px;
  margin: 24px 0 0;
  color: var(--color-text-muted);
  font-size: 18px;
}

.ai-trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin-top: 25px;
  padding: 0;
  color: var(--color-primary);
  list-style: none;
}

.ai-trust-row li {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
}

.ai-route-board {
  position: relative;
  min-height: 492px;
  padding: 18px;
  color: var(--color-paper);
  background: linear-gradient(160deg, var(--color-primary), var(--color-primary-deep));
  border-radius: var(--radius-xl);
  box-shadow: inset 0 1px 0 color-mix(in srgb, var(--color-paper) 16%, var(--color-transparent)), 0 32px 64px color-mix(in srgb, var(--color-primary-deep) 24%, var(--color-transparent));
}

.ai-route-board::before {
  position: absolute;
  right: -18px;
  bottom: -20px;
  width: 44%;
  height: 34%;
  content: '';
  background: var(--color-ochre);
  border-radius: var(--radius-xl);
  clip-path: polygon(20% 100%, 100% 8%, 100% 100%);
}

.ai-route-board-head,
.ai-route-board-foot {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
}

.ai-route-board-head {
  min-height: 36px;
  padding: 0 8px 12px;
  border-bottom: 1px solid color-mix(in srgb, var(--color-paper) 16%, var(--color-transparent));
}

.ai-board-state {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-honey-light);
}

.ai-board-state i {
  width: 8px;
  height: 8px;
  background: var(--color-success);
  border-radius: 50%;
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--color-success) 20%, var(--color-transparent));
}

.ai-route-stage {
  position: relative;
  z-index: 2;
  height: 372px;
  margin-top: 12px;
  overflow: hidden;
  background: color-mix(in srgb, var(--color-paper) 5%, var(--color-transparent));
  border: 1px solid color-mix(in srgb, var(--color-paper) 12%, var(--color-transparent));
  border-radius: var(--radius-lg);
}

.ai-route-stage::before {
  position: absolute;
  inset: 0;
  content: '';
  opacity: .45;
  background-image:
    linear-gradient(color-mix(in srgb, var(--color-paper) 8%, var(--color-transparent)) 1px, var(--color-transparent) 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--color-paper) 8%, var(--color-transparent)) 1px, var(--color-transparent) 1px);
  background-size: 32px 32px;
}

.ai-route-lines {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  color: var(--color-honey);
}

.ai-route-node {
  position: absolute;
  z-index: 3;
  display: grid;
  min-width: 64px;
  min-height: 36px;
  place-items: center;
  padding: 7px 11px;
  color: var(--color-primary-deep);
  background: var(--color-paper);
  border: 2px solid var(--color-honey);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-card);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 800;
}

.ai-route-node-source {
  top: calc(50% - 18px);
  left: 4%;
}

.ai-route-node-model {
  top: 13%;
  left: calc(50% - 32px);
}

.ai-route-node-api {
  bottom: 13%;
  left: calc(50% - 32px);
}

.ai-route-node-web {
  top: calc(50% - 18px);
  right: 4%;
}

.ai-route-core {
  position: absolute;
  z-index: 4;
  top: 50%;
  left: 50%;
  display: flex;
  width: 154px;
  min-height: 146px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  padding: 20px;
  color: var(--color-primary);
  background: var(--color-paper);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-soft);
  text-align: center;
  transform: translate(-50%, -50%);
}

.ai-route-core svg {
  width: 48px;
  height: 48px;
  color: var(--color-ochre);
}

.ai-route-core strong {
  margin-top: 9px;
  font-size: 15px;
}

.ai-route-core span {
  margin-top: 3px;
  color: var(--color-text-muted);
  font-size: 10px;
}

.ai-route-board-foot {
  gap: 12px;
  padding: 13px 8px 0;
  color: color-mix(in srgb, var(--color-paper-muted) 76%, var(--color-transparent));
}

.ai-paper-section {
  background: var(--color-paper-muted);
}

.ai-principle-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.ai-principle-card {
  min-height: 300px;
  padding: 28px;
}

.ai-principle-mark {
  display: inline-flex;
  padding: 6px 10px;
  color: var(--color-ochre);
  background: color-mix(in srgb, var(--color-ochre) 9%, var(--color-transparent));
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .08em;
}

.ai-principle-card h3 {
  margin: 26px 0 12px;
  font-size: 24px;
}

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

.ai-tool-table td {
  vertical-align: top;
}

.route-type {
  display: inline-flex;
  max-width: 100%;
  align-items: center;
  margin-right: 4px;
  padding: 3px 8px;
  overflow: hidden;
  color: var(--color-primary);
  background: color-mix(in srgb, var(--color-honey) 24%, var(--color-transparent));
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 800;
  white-space: nowrap;
}

.ai-tool-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.ai-tool-card {
  padding: 28px;
  background: var(--color-paper);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.ai-tool-card:nth-child(3n + 2) {
  border-top: 4px solid var(--color-honey);
}

.ai-tool-card:nth-child(3n) {
  border-top: 4px solid var(--color-ochre);
}

.ai-tool-card-head {
  display: flex;
  align-items: center;
  gap: 15px;
}

.ai-tool-letter {
  display: grid;
  width: 52px;
  height: 52px;
  place-items: center;
  flex-shrink: 0;
  color: var(--color-paper);
  background: var(--color-primary);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 800;
}

.ai-tool-card-head h3 {
  margin: 0 0 2px;
  font-size: 22px;
}

.ai-tool-card-head div > span {
  color: var(--color-text-muted);
  font-size: 12px;
}

.ai-tool-card > p {
  margin: 20px 0 0;
  color: var(--color-text-muted);
}

.ai-developer-section {
  background: linear-gradient(145deg, var(--color-primary), var(--color-primary-deep));
}

.ai-developer-layout {
  display: grid;
  grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
  gap: 64px;
  align-items: start;
}

.ai-developer-copy {
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

.ai-developer-copy h2 {
  color: var(--color-paper);
}

.ai-developer-copy p {
  color: color-mix(in srgb, var(--color-paper-muted) 82%, var(--color-transparent));
}

.ai-workflow-list {
  display: grid;
  gap: 16px;
}

.ai-workflow-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  padding: 25px;
  background: var(--color-paper);
  border: 1px solid color-mix(in srgb, var(--color-paper) 60%, var(--color-transparent));
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.ai-workflow-icon {
  display: grid;
  width: 50px;
  height: 50px;
  place-items: center;
  color: var(--color-primary);
  background: var(--color-paper-muted);
  border-radius: var(--radius-md);
}

.ai-workflow-icon svg {
  width: 26px;
  height: 26px;
}

.ai-workflow-item h3 {
  margin-bottom: 7px;
  font-size: 21px;
}

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

.ai-failure-table td {
  vertical-align: top;
}

.ai-checklist {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 28px;
}

.ai-checklist article {
  padding: 24px;
  background: var(--color-paper);
  border-left: 5px solid var(--color-honey);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  box-shadow: var(--shadow-card);
}

.ai-checklist h3 {
  margin-bottom: 9px;
  font-size: 20px;
}

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

.ai-selection-section {
  background: var(--color-paper-muted);
}

.ai-selection-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 48px;
  align-items: center;
  padding: 44px;
  background: var(--color-paper);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-soft);
}

.ai-selection-copy {
  max-width: 900px;
}

.ai-selection-copy h2 {
  margin-bottom: 22px;
}

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

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

.ai-selection-copy strong {
  color: var(--color-primary);
}

.ai-selection-actions {
  display: flex;
  min-width: 190px;
  align-items: stretch;
  flex-direction: column;
  gap: 12px;
}

.ai-fact-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 24px;
  overflow: hidden;
  background: var(--color-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.ai-fact-strip > div {
  min-width: 0;
  padding: 20px;
  border-right: 1px solid color-mix(in srgb, var(--color-paper) 14%, var(--color-transparent));
}

.ai-fact-strip > div:last-child {
  border-right: 0;
}

.ai-fact-strip span,
.ai-fact-strip strong {
  display: block;
}

.ai-fact-strip span {
  margin-bottom: 5px;
  color: var(--color-honey-light);
  font-family: var(--font-mono);
  font-size: 11px;
}

.ai-fact-strip strong {
  color: var(--color-paper);
  font-size: 13px;
  overflow-wrap: anywhere;
}

@media (max-width: 1100px) {
  .ai-hero-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .ai-hero-copy {
    max-width: 760px;
  }

  .ai-route-board {
    width: 760px;
    max-width: 100%;
    margin-inline: auto;
  }

  .ai-developer-layout {
    grid-template-columns: 1fr;
  }

  .ai-developer-copy {
    position: static;
  }

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

  .ai-selection-actions {
    min-width: 0;
    align-items: flex-start;
    flex-direction: row;
  }

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

  .ai-fact-strip > div:nth-child(2) {
    border-right: 0;
  }

  .ai-fact-strip > div:nth-child(-n + 2) {
    border-bottom: 1px solid color-mix(in srgb, var(--color-paper) 14%, var(--color-transparent));
  }
}

@media (max-width: 820px) {
  .ai-principle-grid,
  .ai-tool-grid,
  .ai-checklist {
    grid-template-columns: 1fr;
  }

  .ai-principle-card {
    min-height: 0;
  }
}

@media (max-width: 640px) {
  .ai-hero {
    padding-top: 48px;
    padding-bottom: 56px;
  }

  .ai-hero-grid {
    gap: 42px;
  }

  .ai-hero-lede {
    font-size: 16px;
  }

  .ai-route-board {
    min-height: 350px;
    padding: 12px;
  }

  .ai-route-board::before {
    right: -8px;
    bottom: -10px;
  }

  .ai-route-stage {
    height: 260px;
  }

  .ai-route-board-foot {
    flex-wrap: wrap;
  }

  .ai-route-lines {
    transform: scaleY(.72);
  }

  .ai-route-core {
    width: 126px;
    min-height: 118px;
    padding: 14px;
  }

  .ai-route-core svg {
    width: 36px;
    height: 36px;
  }

  .ai-route-node {
    min-width: 50px;
    min-height: 31px;
    padding: 5px 8px;
    font-size: 9px;
  }

  .ai-route-node-source {
    left: 2%;
  }

  .ai-route-node-web {
    right: 2%;
  }

  .ai-principle-card,
  .ai-tool-card,
  .ai-workflow-item {
    padding: 22px;
  }

  .ai-workflow-item {
    grid-template-columns: 1fr;
  }

  .ai-selection-panel {
    gap: 28px;
    padding: 25px;
  }

  .ai-selection-actions {
    width: 100%;
    flex-direction: column;
  }

  .ai-selection-actions .btn {
    width: 100%;
  }

  .ai-fact-strip {
    grid-template-columns: 1fr;
  }

  .ai-fact-strip > div,
  .ai-fact-strip > div:nth-child(2) {
    border-right: 0;
    border-bottom: 1px solid color-mix(in srgb, var(--color-paper) 14%, var(--color-transparent));
  }

  .ai-fact-strip > div:last-child {
    border-bottom: 0;
  }

  .route-type {
    white-space: normal;
  }
}

@media (max-width: 380px) {
  .ai-route-core {
    width: 112px;
  }

  .ai-route-node {
    min-width: 44px;
  }

  .ai-route-board-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 5px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ai-page::before {
    position: absolute;
  }
}