:root {
  --ai-panel-width: 540px;
  --ai-hero-gap: clamp(34px, 6vw, 84px);
  --ai-route-size: 112px;
  --ai-line-width: 2px;
  --ai-section-line: 1px;
}

.ai-page {
  overflow-x: clip;
}

.ai-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(58px, 8vw, 108px);
  padding-bottom: clamp(64px, 9vw, 118px);
}

.ai-hero::before {
  position: absolute;
  top: 2%;
  right: -8%;
  width: min(760px, 62vw);
  height: min(760px, 62vw);
  border-radius: var(--radius-pill);
  background: radial-gradient(closest-side, var(--color-halo), transparent 72%);
  content: "";
  pointer-events: none;
}

.ai-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(430px, 0.95fr);
  gap: var(--ai-hero-gap);
  align-items: center;
}

.ai-hero-copy h1 {
  max-width: 690px;
  margin-top: 22px;
}

.ai-hero-lead {
  max-width: 660px;
  margin-bottom: 0;
  font-size: 18px;
  line-height: 1.9;
}

.ai-routing-panel {
  width: 100%;
  max-width: var(--ai-panel-width);
  justify-self: end;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-xl);
  background: var(--color-canvas);
  box-shadow: var(--shadow-panel);
}

.ai-panel-chrome {
  display: flex;
  min-height: 54px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 12px 20px;
  border-bottom: 1px solid var(--color-line);
  background: var(--color-panel-strong);
}

.ai-window-dots {
  display: flex;
  gap: 7px;
}

.ai-window-dots i {
  width: 9px;
  height: 9px;
  border-radius: var(--radius-pill);
  background: var(--color-line);
}

.ai-panel-label {
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.ai-routing-body {
  position: relative;
  display: grid;
  min-height: 390px;
  grid-template-columns: minmax(112px, 1fr) var(--ai-route-size) minmax(112px, 1fr);
  gap: 22px;
  align-items: center;
  padding: 36px 28px;
}

.ai-routing-body::before,
.ai-routing-body::after {
  position: absolute;
  top: 50%;
  height: var(--ai-line-width);
  background: linear-gradient(90deg, var(--color-accent), var(--color-warning));
  content: "";
  opacity: 0.48;
}

.ai-routing-body::before {
  right: 50%;
  left: 16%;
}

.ai-routing-body::after {
  right: 16%;
  left: 50%;
}

.ai-input-stack,
.ai-output-stack {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 12px;
}

.ai-port,
.ai-output-stack span {
  display: grid;
  min-height: 54px;
  align-items: center;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-canvas);
  box-shadow: 0 8px 20px var(--color-soft-shadow);
}

.ai-port {
  grid-template-columns: auto 1fr;
  column-gap: 9px;
  padding: 9px 12px;
}

.ai-port small {
  grid-column: 2;
  color: var(--color-muted);
  font-size: 11px;
}

.ai-port b {
  font-family: var(--font-mono);
  font-size: 12px;
}

.ai-output-stack span {
  padding: 10px 13px;
  color: var(--color-ink);
  font-size: 13px;
  font-weight: 750;
}

.ai-route-core {
  position: relative;
  z-index: 2;
  display: grid;
  justify-items: center;
  gap: 5px;
}

.ai-core-ring {
  display: grid;
  width: var(--ai-route-size);
  height: var(--ai-route-size);
  place-items: center;
  border: 4px solid var(--color-accent);
  border-radius: var(--radius-pill);
  background: radial-gradient(closest-side, var(--color-halo), var(--color-canvas));
  box-shadow: 0 0 36px var(--color-halo);
}

.ai-core-ring .dot {
  width: 14px;
  height: 14px;
}

.ai-route-core strong {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
}

.ai-route-core small {
  color: var(--color-muted);
  font-size: 10px;
  text-align: center;
}

.ai-panel-foot {
  display: flex;
  min-height: 64px;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 20px;
  border-top: 1px solid var(--color-line);
  background: var(--color-panel);
}

.ai-panel-foot .mono {
  color: var(--color-muted);
  font-size: 10px;
  letter-spacing: 0.08em;
}

.ai-toc-wrap {
  position: relative;
  z-index: 5;
}

.ai-article {
  position: relative;
}

.ai-soft-section {
  background: var(--color-panel);
}

.ai-section-grid {
  display: grid;
  grid-template-columns: minmax(260px, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(34px, 6vw, 86px);
  align-items: start;
}

.ai-principles {
  display: grid;
  gap: 14px;
}

.ai-principle {
  position: relative;
  padding: 28px 30px 28px 82px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-canvas);
}

.ai-principle::before {
  position: absolute;
  top: 30px;
  bottom: 30px;
  left: 58px;
  width: 1px;
  background: var(--color-line);
  content: "";
}

.ai-principle-code {
  position: absolute;
  top: 31px;
  left: 18px;
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.08em;
  writing-mode: vertical-rl;
}

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

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

.ai-compare-table td {
  min-width: 170px;
}

.ai-compare-table td:first-child {
  min-width: 130px;
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
}

.ai-table-note {
  margin-top: 22px;
}

.ai-process {
  position: relative;
  display: grid;
  gap: 16px;
  max-width: 960px;
}

.ai-process::before {
  position: absolute;
  top: 34px;
  bottom: 34px;
  left: 28px;
  width: var(--ai-section-line);
  background: var(--color-accent);
  content: "";
  opacity: 0.35;
}

.ai-process-step {
  position: relative;
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 22px;
  align-items: start;
  padding: 24px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-canvas);
}

.ai-process-marker {
  position: relative;
  z-index: 1;
  display: grid;
  width: 58px;
  height: 58px;
  place-items: center;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  color: var(--color-white);
  font-family: var(--font-mono);
  font-weight: 800;
}

.ai-process-step p {
  margin-bottom: 0;
}

.ai-fact-strip {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  margin-top: 24px;
  padding: 20px 24px;
  border-radius: var(--radius-lg);
  background: var(--color-panel-strong);
}

.ai-fact-strip span {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--color-muted);
  font-size: 13px;
}

.ai-fact-strip strong {
  overflow-wrap: anywhere;
}

.ai-fact-strip a {
  font-weight: 800;
  text-decoration: none;
}

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

.ai-mode-panel {
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-canvas);
  box-shadow: var(--shadow-card-hover);
}

.ai-mode-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}

.ai-mode-head h3 {
  margin-bottom: 0;
}

.ai-mode-panel .check-list {
  margin-bottom: 0;
}

.ai-mode-panel .check-list li {
  padding: 8px 0;
  border-bottom: 1px solid var(--color-line);
  color: var(--color-muted);
}

.ai-mode-panel .check-list li:last-child {
  border-bottom: 0;
}

.ai-dev-list {
  display: grid;
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-line);
}

.ai-dev-list article {
  position: relative;
  padding: 26px 28px 26px 86px;
  background: var(--color-canvas);
}

.ai-dev-list article:nth-child(even) {
  background: var(--color-panel);
}

.ai-dev-label {
  position: absolute;
  top: 30px;
  left: 24px;
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 800;
}

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

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

.ai-fault-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.ai-fault {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 24px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-canvas);
}

.ai-fault > .dot {
  margin-top: 10px;
}

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

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

.ai-reset-callout {
  margin-top: 20px;
  background: var(--color-canvas);
}

.ai-routing-summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 44px;
  align-items: end;
  padding: clamp(30px, 5vw, 56px);
  border-radius: var(--radius-xl);
  background: var(--color-ink);
}

.ai-routing-summary h2 {
  color: var(--color-white);
}

.ai-routing-summary p {
  max-width: 790px;
  color: var(--color-panel-strong);
}

.ai-route-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.ai-routing-summary .btn-secondary {
  border-color: var(--color-muted);
  background: transparent;
  color: var(--color-white);
}

.ai-routing-summary .btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-white);
}

.ai-service-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.ai-service-facts > div {
  padding: 24px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-canvas);
}

.ai-service-facts .mono {
  display: block;
  margin-bottom: 10px;
  color: var(--color-accent-dark);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.ai-service-facts strong {
  display: block;
  overflow-wrap: anywhere;
}

.ai-service-facts p {
  margin: 10px 0 0;
  font-size: 14px;
}

@media (max-width: 1040px) {
  .ai-hero-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .ai-routing-panel {
    max-width: 760px;
    justify-self: center;
  }

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

  .ai-section-grid .section-heading {
    margin-bottom: 0;
  }
}

@media (max-width: 820px) {
  .ai-dual-panel,
  .ai-fault-grid,
  .ai-service-facts {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .ai-routing-summary {
    grid-template-columns: minmax(0, 1fr);
    align-items: start;
  }

  .ai-route-actions {
    align-items: flex-start;
    flex-direction: row;
    flex-wrap: wrap;
  }
}

@media (max-width: 640px) {
  :root {
    --ai-route-size: 82px;
  }

  .ai-hero {
    padding-top: 42px;
    padding-bottom: 58px;
  }

  .ai-hero::before {
    top: 28%;
    right: -45%;
    width: 130vw;
    height: 130vw;
  }

  .ai-hero-lead {
    font-size: 16px;
    line-height: 1.78;
  }

  .ai-routing-panel {
    border-radius: var(--radius-lg);
  }

  .ai-routing-body {
    min-height: 340px;
    grid-template-columns: minmax(86px, 1fr) var(--ai-route-size) minmax(86px, 1fr);
    gap: 8px;
    padding: 24px 12px;
  }

  .ai-port,
  .ai-output-stack span {
    min-height: 48px;
  }

  .ai-port {
    column-gap: 6px;
    padding: 7px 8px;
  }

  .ai-port small {
    display: none;
  }

  .ai-output-stack span {
    padding: 8px;
    font-size: 11px;
  }

  .ai-core-ring {
    border-width: 3px;
  }

  .ai-route-core small {
    display: none;
  }

  .ai-panel-foot {
    align-items: flex-start;
    flex-direction: column;
  }

  .ai-panel-foot .mono {
    overflow-wrap: anywhere;
  }

  .ai-principle {
    padding: 24px 20px 24px 60px;
  }

  .ai-principle::before {
    left: 44px;
  }

  .ai-principle-code {
    left: 12px;
  }

  .ai-process::before {
    left: 22px;
  }

  .ai-process-step {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 14px;
    padding: 18px;
  }

  .ai-process-marker {
    width: 44px;
    height: 44px;
  }

  .ai-mode-panel,
  .ai-fault,
  .ai-service-facts > div {
    border-radius: var(--radius-md);
  }

  .ai-dev-list article {
    padding: 60px 20px 22px;
  }

  .ai-dev-label {
    top: 22px;
    left: 20px;
  }

  .ai-routing-summary {
    gap: 28px;
    border-radius: var(--radius-lg);
  }

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

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