.ai-hero {
  position: relative;
  padding-top: 88px;
  padding-bottom: 82px;
  overflow-x: clip;
  border-bottom: 1px solid color-mix(in srgb, var(--color-border) 58%, transparent);
}

.ai-hero::before {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(color-mix(in srgb, var(--color-border) 22%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--color-border) 22%, transparent) 1px, transparent 1px);
  background-size: 68px 68px;
  content: '';
  mask-image: linear-gradient(to bottom, var(--color-shadow), transparent);
  opacity: 0.56;
  pointer-events: none;
}

.ai-hero::after {
  position: absolute;
  top: 10%;
  right: -12%;
  width: 52vw;
  height: 52vw;
  border: 1px solid color-mix(in srgb, var(--color-accent) 22%, transparent);
  border-radius: var(--radius-pill);
  background: radial-gradient(circle, color-mix(in srgb, var(--color-accent) 15%, transparent), transparent 67%);
  content: '';
  pointer-events: none;
}

.ai-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: 66px;
  align-items: center;
}

.ai-hero-copy,
.ai-route-board {
  min-width: 0;
}

.ai-hero-copy h1 {
  margin-top: 22px;
  margin-bottom: 20px;
  font-size: clamp(52px, 5vw, 68px);
}

.ai-hero-copy h1 span {
  display: inline-block;
}

.ai-hero-copy h1 span + span {
  margin-left: 0.2em;
}

.ai-hero-lede {
  max-width: 34em;
  margin: 0;
  color: var(--color-text-muted);
  font-size: 17px;
  line-height: 1.9;
}

.ai-hero-actions {
  margin-top: 30px;
  margin-bottom: 26px;
}

.ai-route-board {
  position: relative;
  padding: 28px;
  overflow: clip;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(145deg, color-mix(in srgb, var(--color-accent) 9%, transparent), transparent 54%),
    var(--color-panel);
  box-shadow: var(--shadow-panel);
}

.ai-route-board::before,
.ai-route-board::after {
  position: absolute;
  border: 1px dashed color-mix(in srgb, var(--color-accent-pink) 30%, transparent);
  border-radius: var(--radius-pill);
  content: '';
  pointer-events: none;
}

.ai-route-board::before {
  top: -90px;
  right: -78px;
  width: 220px;
  height: 220px;
}

.ai-route-board::after {
  right: -20px;
  bottom: -70px;
  width: 148px;
  height: 148px;
}

.ai-board-head,
.ai-route-flow,
.ai-tool-cloud,
.ai-board-foot {
  position: relative;
  z-index: 1;
}

.ai-board-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 46px;
}

.ai-board-note {
  color: var(--color-text-muted);
  font-size: 12px;
}

.ai-route-flow {
  display: grid;
  grid-template-columns: minmax(116px, auto) minmax(70px, 1fr) minmax(136px, auto);
  align-items: center;
  gap: 14px;
}

.ai-route-source,
.ai-route-exit {
  display: flex;
  min-width: 0;
  flex-direction: column;
  align-items: flex-start;
  padding: 18px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel-raised);
}

.ai-route-source strong,
.ai-route-exit strong {
  margin-top: 12px;
  font-size: 14px;
}

.ai-route-source small,
.ai-route-exit small {
  margin-top: 4px;
  font-size: 11px;
}

.ai-coordinate {
  display: inline-flex;
  min-height: 26px;
  align-items: center;
  padding: 3px 10px;
  border: 1px solid color-mix(in srgb, var(--color-accent) 54%, var(--color-border));
  border-radius: var(--radius-pill);
  color: var(--color-accent-pink);
  font-size: 11px;
}

.ai-route-exit .status-dot {
  margin-top: 7px;
}

.ai-route-line {
  position: relative;
  height: 2px;
  overflow: visible;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-pink));
  box-shadow: 0 0 16px color-mix(in srgb, var(--color-accent) 52%, transparent);
}

.ai-route-line::before,
.ai-route-line::after {
  position: absolute;
  top: 50%;
  width: 10px;
  height: 10px;
  border: 2px solid var(--color-accent-pink);
  border-radius: var(--radius-pill);
  background: var(--color-panel);
  content: '';
  transform: translateY(-50%);
}

.ai-route-line::before {
  left: -2px;
}

.ai-route-line::after {
  right: -2px;
}

.ai-route-pulse {
  position: absolute;
  top: 50%;
  left: 20%;
  width: 8px;
  height: 8px;
  border-radius: var(--radius-pill);
  background: var(--color-text);
  box-shadow: 0 0 14px var(--color-accent-pink);
  transform: translateY(-50%);
}

.ai-tool-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 38px;
}

.ai-tool-cloud span {
  display: inline-flex;
  min-height: 34px;
  align-items: center;
  padding: 6px 13px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: color-mix(in srgb, var(--color-bg) 48%, transparent);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.ai-board-foot {
  max-width: 42em;
  margin-top: 22px;
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: 12px;
}

.ai-article {
  position: relative;
  padding-top: 72px;
  padding-bottom: 104px;
}

.ai-article > .toc-tabs {
  width: max-content;
  margin-right: auto;
  margin-left: auto;
}

.ai-copy-section {
  max-width: 1040px;
  margin-inline: auto;
  padding-top: 72px;
  padding-bottom: 24px;
}

.ai-copy-section + .ai-copy-section {
  border-top: 1px solid color-mix(in srgb, var(--color-border) 58%, transparent);
}

.ai-copy-section .section-head {
  max-width: 800px;
}

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

.ai-principle {
  min-width: 0;
  padding: 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, var(--color-panel), var(--color-panel-raised));
}

.ai-principle-mark {
  display: inline-flex;
  min-width: 50px;
  min-height: 30px;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  border: 1px solid color-mix(in srgb, var(--color-accent) 52%, var(--color-border));
  border-radius: var(--radius-pill);
  color: var(--color-accent-pink);
  font-size: 11px;
}

.ai-principle h3 {
  font-size: 21px;
}

.ai-principle p,
.ai-reading-grid p,
.ai-compare-panel p,
.ai-compare-panel li,
.ai-dev-list p,
.ai-route-steps p,
.ai-next-card p {
  color: var(--color-text-muted);
}

.ai-tool-table td:nth-child(2),
.ai-tool-table td:nth-child(3),
.ai-tool-table td:nth-child(4) {
  min-width: 210px;
}

.ai-reading-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 44px;
}

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

.ai-reading-grid h3 {
  position: relative;
  padding-top: 22px;
}

.ai-reading-grid h3::before {
  position: absolute;
  top: 0;
  left: 0;
  width: 54px;
  border-top: 3px solid var(--color-accent);
  content: '';
}

.ai-compare {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.ai-compare-panel {
  min-width: 0;
  padding: 30px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-panel);
}

.ai-compare-panel h3 {
  margin-top: 24px;
}

.ai-compare-panel ul {
  margin-bottom: 0;
  padding-left: 1.2em;
}

.ai-compare-panel li + li {
  margin-top: 9px;
}

.ai-dev-list {
  display: grid;
  overflow: clip;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-panel);
}

.ai-dev-list > section {
  display: grid;
  grid-template-columns: 86px minmax(0, 1fr);
  gap: 26px;
  padding: 30px;
  border-bottom: 1px solid var(--color-border);
}

.ai-dev-list > section:last-child {
  border-bottom: 0;
}

.ai-dev-index {
  display: inline-flex;
  width: 68px;
  height: 38px;
  align-items: center;
  justify-content: center;
  border: 1px solid color-mix(in srgb, var(--color-accent) 56%, var(--color-border));
  border-radius: var(--radius-pill);
  background: color-mix(in srgb, var(--color-accent) 12%, transparent);
  color: var(--color-accent-pink);
  font-family: var(--font-mono);
  font-size: 11px;
}

.ai-dev-list h3 {
  font-size: 21px;
}

.ai-route-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.ai-route-steps section {
  position: relative;
  min-width: 0;
  padding: 28px;
  overflow: clip;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
}

.ai-route-steps section::after {
  position: absolute;
  right: -32px;
  bottom: -38px;
  width: 106px;
  height: 106px;
  border: 1px dashed color-mix(in srgb, var(--color-accent) 34%, transparent);
  border-radius: var(--radius-pill);
  content: '';
}

.ai-route-steps h3,
.ai-route-steps p {
  position: relative;
  z-index: 1;
}

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

.ai-next-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 28px;
}

.ai-next-card {
  display: flex;
  min-width: 0;
  min-height: 250px;
  flex-direction: column;
  align-items: flex-start;
  padding: 30px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: linear-gradient(145deg, var(--color-panel), var(--color-panel-raised));
  transition:
    transform var(--transition-fast),
    border-color var(--transition-fast);
}

.ai-next-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-accent);
}

.ai-next-card h3 {
  margin-top: 24px;
}

.ai-next-card p {
  flex: 1;
}

.ai-final-note {
  margin-bottom: 0;
}

@media (max-width: 960px) {
  .ai-hero-grid {
    grid-template-columns: 1fr;
    gap: 46px;
  }

  .ai-hero-copy {
    max-width: 720px;
  }

  .ai-route-board {
    max-width: 760px;
  }

  .ai-route-steps {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .ai-hero {
    padding-top: 64px;
    padding-bottom: 62px;
  }

  .ai-hero::after {
    display: none;
  }

  .ai-hero-copy h1 {
    font-size: clamp(34px, 9.5vw, 40px);
  }

  .ai-hero-copy h1 span {
    display: block;
  }

  .ai-hero-copy h1 span + span {
    margin-top: 4px;
    margin-left: 0;
  }

  .ai-board-note {
    display: none;
  }

  .ai-route-flow {
    grid-template-columns: 1fr;
  }

  .ai-route-line {
    width: 2px;
    height: 48px;
    margin-inline: auto;
    background: linear-gradient(var(--color-accent), var(--color-accent-pink));
  }

  .ai-route-line::before,
  .ai-route-line::after {
    left: 50%;
    transform: translate(-50%, -50%);
  }

  .ai-route-line::before {
    top: 0;
  }

  .ai-route-line::after {
    top: auto;
    right: auto;
    bottom: -10px;
  }

  .ai-route-pulse {
    top: 34%;
    left: 50%;
    transform: translate(-50%, -50%);
  }

  .ai-principle-grid,
  .ai-reading-grid,
  .ai-compare,
  .ai-next-links {
    grid-template-columns: 1fr;
  }

  .ai-reading-grid {
    gap: 22px;
  }

  .ai-copy-section {
    padding-top: 58px;
  }
}

@media (max-width: 640px) {
  .ai-hero-lede {
    font-size: 15px;
  }

  .ai-route-board,
  .ai-principle,
  .ai-compare-panel,
  .ai-route-steps section,
  .ai-next-card {
    padding: 22px;
  }

  .ai-board-head {
    margin-bottom: 30px;
  }

  .ai-tool-cloud {
    margin-top: 28px;
  }

  .ai-tool-cloud span {
    flex: 1 1 112px;
    justify-content: center;
  }

  .ai-article {
    padding-top: 52px;
    padding-bottom: 76px;
  }

  .ai-dev-list > section {
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 24px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .ai-next-card:hover {
    transform: none;
  }
}