.ai-hero {
  position: relative;
  overflow-x: clip;
  max-width: 100%;
  padding-top: clamp(72px, 9vw, 116px);
  padding-bottom: clamp(72px, 9vw, 108px);
  background:
    radial-gradient(circle at 72% 38%, var(--color-horizon-glow), var(--color-clear) 38%),
    linear-gradient(180deg, var(--color-sky), var(--color-bg) 54%, var(--color-road));
}

.ai-hero-grid {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  color: var(--color-grid);
  pointer-events: none;
}

.ai-hero-grid path {
  fill: none;
  stroke: currentColor;
  stroke-width: 1;
  vector-effect: non-scaling-stroke;
}

.ai-hero-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(420px, 1.05fr);
  gap: clamp(42px, 7vw, 86px);
  align-items: center;
}

.ai-hero-copy h1 {
  max-width: 690px;
  margin: 20px 0 0;
}

.ai-title-tail {
  color: var(--color-accent);
}

.ai-hero-lede {
  max-width: 650px;
  margin-top: 22px;
  color: var(--color-text);
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.75;
}

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

.ai-hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 26px;
}

.ai-route-board {
  position: relative;
  padding: clamp(24px, 4vw, 36px);
  overflow: hidden;
  border: 1px solid var(--color-sign-highlight);
  border-radius: var(--radius-medium);
  color: var(--color-white);
  background: linear-gradient(135deg, var(--color-sign), var(--color-sign-end));
  box-shadow: inset 0 1px 0 var(--color-sign-highlight), 0 30px 60px var(--color-shadow);
}

.ai-route-board::after {
  content: "";
  position: absolute;
  right: -18%;
  bottom: -42%;
  width: 280px;
  max-width: 62%;
  aspect-ratio: 1;
  border: 1px solid var(--color-sign-highlight);
  border-radius: 50%;
  pointer-events: none;
}

.ai-board-head {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.ai-board-head strong {
  display: block;
  margin-top: 6px;
  color: var(--color-white);
  font-family: var(--font-display);
  font-size: 25px;
  font-weight: 400;
}

.ai-board-label {
  color: var(--color-sign-dim);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
}

.ai-route-board .status-label {
  flex: 0 0 auto;
  border-color: var(--color-sign-glass-border);
  color: var(--color-white);
  background: var(--color-sign-glass);
}

.ai-path {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  margin-top: 34px;
}

.ai-path-node {
  min-height: 132px;
  padding: 16px 12px;
  border: 1px solid var(--color-sign-glass-border);
  border-radius: var(--radius-small);
  background: var(--color-sign-glass);
  text-align: center;
}

.ai-path-node.is-current {
  box-shadow: inset 0 -3px 0 var(--color-accent);
}

.ai-path-node strong,
.ai-path-node small {
  display: block;
}

.ai-path-node strong {
  margin-top: 14px;
  color: var(--color-white);
  font-size: 14px;
}

.ai-path-node small {
  margin-top: 6px;
  color: var(--color-sign-dim);
  font-size: 11px;
  line-height: 1.5;
}

.ai-node-mark {
  display: inline-grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid var(--color-sign-glass-border);
  border-radius: var(--radius-pill);
  color: var(--color-sign-soft);
  background: var(--color-sign-glass);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .08em;
}

.ai-path-arrow {
  color: var(--color-sign-dim);
  font-family: var(--font-mono);
}

.ai-board-tools {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 24px;
}

.ai-board-tools span {
  display: inline-flex;
  min-height: 28px;
  align-items: center;
  padding: 5px 9px;
  border: 1px solid var(--color-sign-line);
  border-radius: var(--radius-small);
  color: var(--color-sign-soft);
  background: var(--color-sign-glass);
  font-family: var(--font-mono);
  font-size: 10px;
}

.ai-route-board > p {
  position: relative;
  z-index: 1;
  margin: 20px 0 0;
  color: var(--color-sign-soft);
  font-size: 13px;
  line-height: 1.7;
}

.ai-intro {
  background: var(--color-bg);
}

.ai-article {
  max-width: calc(980px + var(--gutter) * 2);
}

.ai-content-section {
  padding-top: 52px;
  padding-bottom: 52px;
  border-bottom: 1px solid var(--color-border);
}

.ai-content-section:first-of-type {
  padding-top: 20px;
}

.ai-content-section:last-child {
  border-bottom: 0;
}

.ai-content-section > h2 {
  max-width: 790px;
  margin: 18px 0 26px;
}

.ai-content-section > p {
  max-width: 850px;
  font-size: 17px;
  line-height: 1.95;
}

.ai-tool-table td:first-child {
  color: var(--color-text);
  font-family: var(--font-mono);
  font-weight: 700;
}

.ai-tool-table td {
  line-height: 1.6;
}

.ai-split-notes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin: 30px 0;
}

.ai-split-notes .panel {
  padding: 28px;
}

.ai-split-notes h3 {
  margin-bottom: 12px;
  font-family: var(--font-display);
  font-size: 27px;
  font-weight: 400;
}

.ai-split-notes p {
  margin-bottom: 0;
}

.ai-workflow {
  margin: 30px 0;
  border-top: 1px solid var(--color-border);
}

.ai-workflow-row {
  display: grid;
  grid-template-columns: 130px minmax(0, 1fr);
  gap: 32px;
  padding-top: 30px;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--color-border);
}

.ai-workflow-row .road-tag {
  align-self: start;
  justify-self: start;
}

.ai-workflow-row h3 {
  margin-bottom: 10px;
  font-family: var(--font-display);
  font-size: 25px;
  font-weight: 400;
}

.ai-workflow-row p {
  margin-bottom: 0;
}

.ai-diagnosis-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 30px;
  border-top: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
}

.ai-diagnosis-list article {
  padding: 26px;
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel);
}

.ai-diagnosis-list h3 {
  margin-bottom: 11px;
  font-size: 19px;
}

.ai-diagnosis-list p {
  margin-bottom: 0;
  font-size: 15px;
  line-height: 1.8;
}

.ai-final-links {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 32px;
  align-items: center;
  margin-top: 46px;
  padding: clamp(28px, 5vw, 46px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-medium);
  color: var(--color-white);
  background: linear-gradient(135deg, var(--color-sign), var(--color-sign-end));
  box-shadow: 0 24px 48px var(--color-shadow);
}

.ai-final-links h3 {
  margin: 9px 0;
  color: var(--color-white);
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 400;
}

.ai-final-links p {
  max-width: 590px;
  margin-bottom: 0;
  color: var(--color-sign-soft);
}

.ai-final-links .btn-neutral {
  border-color: var(--color-sign-glass-border);
  color: var(--color-white);
  background: var(--color-sign-glass);
}

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

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

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

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

@media (max-width: 720px) {
  .ai-hero {
    padding-top: 56px;
    padding-bottom: 64px;
  }

  .ai-hero-grid {
    opacity: .55;
  }

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

  .ai-path-node {
    min-height: 0;
    text-align: left;
  }

  .ai-node-mark {
    vertical-align: middle;
  }

  .ai-path-node strong,
  .ai-path-node small {
    display: inline;
    margin-left: 9px;
  }

  .ai-path-arrow {
    transform: rotate(90deg);
    text-align: center;
  }

  .ai-split-notes,
  .ai-diagnosis-list {
    grid-template-columns: 1fr;
  }

  .ai-workflow-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .ai-final-links .button-row {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .ai-board-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .ai-route-board .status-label {
    align-self: flex-start;
  }

  .ai-content-section {
    padding-top: 42px;
    padding-bottom: 42px;
  }

  .ai-content-section > p {
    font-size: 16px;
  }

  .ai-diagnosis-list article {
    padding: 22px;
  }
}