.ai-hero {
  position: relative;
  min-height: calc(100svh - var(--header-height));
  overflow-x: clip;
  padding-top: 72px;
  padding-bottom: 72px;
}

.ai-hero::before {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(var(--color-dot) 1px, transparent 1.5px);
  background-size: 28px 28px;
  content: "";
  pointer-events: none;
}

.ai-hero::after {
  position: absolute;
  top: -32%;
  right: -18%;
  width: min(72vw, 940px);
  height: min(72vw, 940px);
  background: radial-gradient(circle, var(--color-glow), transparent 64%);
  content: "";
  pointer-events: none;
}

.ai-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  min-height: calc(100svh - var(--header-height) - 144px);
  grid-template-columns: minmax(0, 1.02fr) minmax(430px, .98fr);
  align-items: center;
  gap: 58px;
}

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

.ai-hero-summary {
  max-width: 650px;
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: 17px;
  line-height: 1.85;
}

.ai-fact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.ai-route-visual {
  position: relative;
  min-height: 550px;
  overflow: hidden;
  padding: 24px;
}

.ai-route-visual::before {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow:
    inset 0 0 72px var(--color-glass-inner),
    inset 0 1px 0 var(--color-glass-border);
  content: "";
  pointer-events: none;
}

.ai-visual-head,
.ai-network-map,
.ai-tool-cloud {
  position: relative;
  z-index: 1;
}

.ai-visual-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.ai-network-map {
  display: grid;
  min-height: 420px;
  align-items: center;
}

.ai-network-map svg {
  display: block;
  width: 100%;
  height: auto;
}

.ai-map-glow {
  fill: url("#ai-core-glow");
}

.ai-map-orbit {
  fill: none;
  stroke: var(--color-globe-line);
  stroke-width: 1;
}

.ai-map-orbit-wide {
  transform: rotate(-8deg);
  transform-origin: center;
}

.ai-map-orbit-tall {
  transform: rotate(24deg);
  transform-origin: center;
}

.ai-map-orbit-slant {
  transform: rotate(28deg);
  transform-origin: center;
}

.ai-map-route {
  fill: none;
  stroke: var(--color-route);
  stroke-linecap: round;
  stroke-width: 1.8;
}

.ai-map-route-soft {
  opacity: .58;
}

.ai-map-node {
  fill: var(--color-accent);
}

.ai-map-node-halo {
  fill: var(--color-accent);
  opacity: .18;
}

.ai-tool-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.ai-principle-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

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

.ai-principle-mark {
  display: inline-grid;
  min-width: 48px;
  min-height: 34px;
  margin-bottom: 20px;
  place-items: center;
  border: 1px solid var(--color-accent-dark);
  border-radius: var(--radius-pill);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
}

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

.ai-article {
  border-top: 1px solid var(--color-border-soft);
}

.ai-article-layout {
  display: grid;
  grid-template-columns: minmax(220px, 270px) minmax(0, var(--reading-width));
  justify-content: center;
  gap: 64px;
}

.ai-side-panel {
  position: sticky;
  top: calc(var(--header-height) + 24px);
  align-self: start;
  padding: 22px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
}

.ai-side-title {
  margin-bottom: 12px;
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
}

.ai-side-nav {
  display: grid;
  gap: 3px;
}

.ai-side-nav a {
  display: flex;
  min-height: 40px;
  align-items: center;
  padding: 7px 10px;
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  font-size: 14px;
  transition: background var(--transition-fast), color var(--transition-fast);
}

.ai-side-nav a:hover {
  background: var(--color-panel-raised);
  color: var(--color-accent);
}

.ai-side-facts {
  display: grid;
  gap: 7px;
  padding-top: 18px;
  margin-top: 18px;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.ai-guide {
  min-width: 0;
}

.ai-guide section {
  padding-bottom: 82px;
}

.ai-guide section:last-child {
  padding-bottom: 0;
}

.ai-guide section > h2 {
  margin-top: 0;
}

.ai-guide h3 {
  margin-top: 36px;
  font-size: 24px;
}

.ai-guide p {
  font-size: 16.5px;
  line-height: 1.9;
}

.ai-guide .table-scroll {
  margin-top: 28px;
  margin-bottom: 10px;
}

.ai-guide .comparison-table {
  min-width: 780px;
}

.ai-guide .callout {
  margin-top: 28px;
}

.ai-decision-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 34px;
}

.ai-decision-card {
  display: flex;
  min-width: 0;
  min-height: 190px;
  flex-direction: column;
  justify-content: flex-end;
  padding: 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: linear-gradient(145deg, var(--color-panel-raised), var(--color-panel));
  text-decoration: none;
  transition: border-color var(--transition-fast), transform var(--transition-fast);
}

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

.ai-decision-card strong {
  margin-top: 14px;
  margin-bottom: 8px;
  font-size: 21px;
}

.ai-decision-card > span:last-child {
  color: var(--color-text-muted);
  font-size: 14px;
  line-height: 1.7;
}

@media (max-width: 1080px) {
  .ai-hero {
    min-height: auto;
  }

  .ai-hero-grid {
    min-height: auto;
    grid-template-columns: 1fr;
  }

  .ai-route-visual {
    width: 100%;
    max-width: 720px;
  }

  .ai-article-layout {
    grid-template-columns: minmax(190px, 230px) minmax(0, 1fr);
    gap: 38px;
  }
}

@media (max-width: 860px) {
  .ai-principle-grid {
    grid-template-columns: 1fr;
  }

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

  .ai-side-panel {
    position: static;
  }

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

  .ai-side-facts {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 18px;
  }
}

@media (max-width: 640px) {
  .ai-hero {
    padding-top: 44px;
    padding-bottom: 64px;
  }

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

  .ai-hero-summary {
    font-size: 16px;
    line-height: 1.75;
  }

  .ai-route-visual {
    min-height: 420px;
    padding: 18px;
  }

  .ai-network-map {
    min-height: 300px;
  }

  .ai-principle {
    padding: 23px;
  }

  .ai-side-nav {
    grid-template-columns: 1fr;
  }

  .ai-guide section {
    padding-bottom: 64px;
  }

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

  .ai-guide p {
    font-size: 16px;
  }

  .ai-decision-links {
    grid-template-columns: 1fr;
  }
}