.ai-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--color-line);
  background: var(--color-canvas);
}

.ai-hero::before {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(var(--hero-grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--hero-grid-line) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, var(--color-ink), var(--hero-grid-fade));
  content: "";
  pointer-events: none;
}

.ai-hero-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(420px, 1.08fr);
  align-items: center;
  gap: clamp(44px, 7vw, 92px);
}

.ai-hero-copy h1 {
  max-width: 700px;
  margin-top: 20px;
}

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

.ai-hero-copy .lead {
  max-width: 660px;
}

.ai-hero-copy .cta-row {
  margin-top: 30px;
}

.ai-trust-row {
  justify-content: flex-start;
  margin-top: 28px;
}

.ai-route-panel {
  position: relative;
  padding: 20px;
  transform: rotate(0.4deg);
}

.ai-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-line);
  color: var(--color-muted);
  font-size: 12px;
}

.ai-schematic {
  width: 100%;
  margin-top: 8px;
}

.ai-svg-ground {
  fill: var(--color-panel-strong);
  stroke: var(--color-line);
  stroke-width: 1.2;
}

.ai-svg-guide {
  fill: none;
  stroke: var(--color-line);
  stroke-dasharray: 5 7;
  stroke-width: 1.2;
}

.ai-svg-pipe-outer {
  fill: none;
  stroke: var(--color-ink);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 24;
}

.ai-svg-pipe-inner {
  fill: none;
  stroke: var(--color-panel);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 20;
}

.ai-svg-pipe-accent {
  fill: none;
  stroke: var(--color-accent);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 20;
}

.ai-svg-node-side,
.ai-svg-node-top,
.ai-svg-port,
.ai-svg-hub,
.ai-tool-chip {
  stroke: var(--color-ink);
  stroke-width: 1.3;
}

.ai-svg-node-side,
.ai-svg-hub,
.ai-tool-chip {
  fill: var(--color-canvas);
}

.ai-svg-node-top {
  fill: var(--color-panel);
}

.ai-svg-port {
  fill: none;
  stroke: var(--color-accent);
  stroke-width: 1.5;
}

.ai-svg-accent,
.ai-svg-packet {
  fill: var(--color-accent);
}

.ai-svg-label,
.ai-tool-text {
  fill: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.ai-svg-packet {
  opacity: 0;
  stroke: var(--color-canvas);
  stroke-width: 1.3;
}

.ai-packet-a {
  animation: ai-packet-a 3.6s linear infinite;
}

.ai-packet-b {
  animation: ai-packet-b 3.6s linear infinite 0.8s;
}

.ai-packet-c {
  animation: ai-packet-c 2.5s linear infinite 0.4s;
}

@keyframes ai-packet-a {
  0% {
    opacity: 0;
    transform: translate(0, 0);
  }

  10%,
  88% {
    opacity: 1;
  }

  100% {
    opacity: 0;
    transform: translate(150px, 82px);
  }
}

@keyframes ai-packet-b {
  0% {
    opacity: 0;
    transform: translate(0, 0);
  }

  10%,
  88% {
    opacity: 1;
  }

  100% {
    opacity: 0;
    transform: translate(-151px, 86px);
  }
}

@keyframes ai-packet-c {
  0% {
    opacity: 0;
    transform: translate(0, 0);
  }

  10%,
  88% {
    opacity: 1;
  }

  100% {
    opacity: 0;
    transform: translate(0, 57px);
  }
}

.ai-document {
  padding-top: clamp(36px, 6vw, 72px);
}

.ai-reading {
  width: 100%;
  max-width: var(--reading-width);
  margin-inline: auto;
}

.ai-section {
  padding-top: clamp(72px, 9vw, 112px);
  padding-bottom: clamp(72px, 9vw, 112px);
  border-bottom: 1px solid var(--color-line);
}

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

.ai-section > h2 {
  margin-top: 20px;
}

.ai-section > p {
  color: var(--color-muted);
}

.ai-section > p:first-of-type {
  color: var(--color-ink);
  font-size: 18px;
}

.ai-section a {
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.ai-inline-link {
  color: var(--color-accent);
  font-weight: 750;
  text-decoration: underline;
}

.ai-signal-flow {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  margin: 34px 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-medium);
  background: var(--color-line);
  box-shadow: var(--shadow-panel);
}

.ai-signal-flow > div {
  position: relative;
  min-height: 188px;
  padding: 22px;
  background: var(--color-canvas);
}

.ai-signal-flow > div::after {
  position: absolute;
  right: -7px;
  bottom: 24px;
  z-index: 2;
  width: 13px;
  height: 13px;
  border: 3px solid var(--color-canvas);
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  content: "";
}

.ai-signal-flow > div:last-child::after {
  display: none;
}

.ai-signal-flow span,
.ai-tool-notes span,
.ai-workflow-list .ai-unit-code,
.ai-decision-lanes span {
  color: var(--color-accent);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.ai-signal-flow strong {
  display: block;
  margin-top: 14px;
}

.ai-signal-flow p {
  margin: 8px 0 0;
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1.65;
}

.ai-tool-table td {
  color: var(--color-muted);
  font-size: 14px;
}

.ai-tool-table td:first-child {
  color: var(--color-ink);
  font-weight: 750;
}

.ai-tool-notes {
  display: grid;
  gap: 0;
  margin-top: 42px;
  border-top: 1px solid var(--color-line);
}

.ai-tool-notes article {
  display: grid;
  grid-template-columns: 145px minmax(0, 1fr);
  column-gap: 28px;
  padding-top: 28px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--color-line);
}

.ai-tool-notes article > span {
  grid-row: 1 / span 2;
}

.ai-tool-notes h3 {
  margin-bottom: 8px;
  font-size: 22px;
}

.ai-tool-notes p {
  margin: 0;
  color: var(--color-muted);
}

.ai-check-board {
  display: grid;
  gap: 12px;
  margin-top: 34px;
}

.ai-check-board > div {
  display: flex;
  gap: 16px;
  padding: 20px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-small);
  background: var(--color-panel);
}

.ai-check-mark {
  display: grid;
  width: 30px;
  height: 30px;
  flex: 0 0 auto;
  place-items: center;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  color: var(--color-canvas);
  font-weight: 800;
}

.ai-check-board p {
  margin: 4px 0 0;
  color: var(--color-muted);
  font-size: 14px;
}

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

.ai-comparison article {
  padding: 26px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-medium);
  background: var(--color-canvas);
  box-shadow: var(--shadow-panel);
}

.ai-comparison h3 {
  margin-top: 18px;
  font-size: 23px;
}

.ai-comparison ul {
  display: grid;
  gap: 9px;
  margin-bottom: 0;
  color: var(--color-muted);
}

.ai-section .callout {
  margin-top: 34px;
}

.ai-workflow-list {
  display: grid;
  gap: 0;
  margin-top: 36px;
  border-top: 1px solid var(--color-line);
}

.ai-workflow-list article {
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 24px;
  padding-top: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--color-line);
}

.ai-unit-code {
  display: grid;
  width: 72px;
  height: 72px;
  place-items: center;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-small);
  background: var(--accent-soft);
  font-family: var(--font-mono);
  font-weight: 750;
}

.ai-workflow-list h3 {
  margin-bottom: 8px;
}

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

.ai-diagnosis {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  margin-top: 36px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-medium);
  background: var(--color-line);
}

.ai-diagnosis article {
  min-height: 230px;
  padding: 26px;
  background: var(--color-canvas);
}

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

.ai-diagnosis p {
  margin: 0;
  color: var(--color-muted);
  font-size: 14px;
}

.ai-decision-lanes {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 36px;
}

.ai-decision-lanes article {
  position: relative;
  padding: 24px;
  border-top: 3px solid var(--color-accent);
  border-right: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  border-left: 1px solid var(--color-line);
  border-radius: 0 0 var(--radius-small) var(--radius-small);
  background: var(--color-panel);
}

.ai-decision-lanes h3 {
  margin-top: 15px;
  font-size: 20px;
}

.ai-decision-lanes p {
  margin: 0;
  color: var(--color-muted);
  font-size: 14px;
}

.ai-promo {
  margin-top: clamp(24px, 5vw, 56px);
  margin-bottom: var(--section-space);
}

@media (max-width: 980px) {
  .ai-hero-shell {
    grid-template-columns: minmax(0, 1fr);
  }

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

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

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

  .ai-signal-flow > div::after {
    display: none;
  }

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

@media (max-width: 720px) {
  .ai-hero-shell {
    gap: 36px;
  }

  .ai-route-panel {
    padding: 14px;
    transform: none;
  }

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

  .ai-trust-row {
    align-items: stretch;
  }

  .ai-trust-row .chip {
    justify-content: center;
  }

  .ai-signal-flow,
  .ai-comparison,
  .ai-diagnosis {
    grid-template-columns: minmax(0, 1fr);
  }

  .ai-signal-flow > div,
  .ai-diagnosis article {
    min-height: 0;
  }

  .ai-tool-notes article {
    grid-template-columns: minmax(0, 1fr);
    row-gap: 12px;
  }

  .ai-tool-notes article > span {
    grid-row: auto;
  }

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

  .ai-unit-code {
    width: 62px;
    height: 62px;
  }
}

@media (max-width: 480px) {
  .ai-route-panel {
    margin-inline: -4px;
  }

  .ai-schematic {
    width: 118%;
    max-width: none;
    margin-left: -9%;
  }

  .ai-section > p:first-of-type {
    font-size: 17px;
  }

  .ai-check-board > div,
  .ai-comparison article,
  .ai-diagnosis article,
  .ai-decision-lanes article {
    padding: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .ai-svg-packet {
    animation: none;
    opacity: 0.85;
  }
}