.ai-hero {
  padding-top: 72px;
  padding-bottom: 58px;
  background:
    linear-gradient(90deg, transparent 0, transparent calc(50% - 1px), var(--color-border) 50%, transparent calc(50% + 1px), transparent 100%),
    var(--color-bg);
  text-align: center;
}

.ai-hero::after {
  position: absolute;
  right: 8%;
  bottom: 28px;
  width: 110px;
  height: 110px;
  border: 1px solid var(--color-accent);
  border-radius: 50%;
  content: "";
  opacity: .2;
}

.ai-hero > .wrap {
  position: relative;
  z-index: 1;
}

.ai-hero h1 {
  max-width: 760px;
  margin: 0 auto 20px;
}

.ai-hero-sub {
  max-width: 720px;
  margin: 0 auto 28px;
  color: var(--color-muted);
  font-size: 19px;
}

.ai-hero-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-bottom: 30px;
}

.ai-hero-actions .btn {
  min-width: 148px;
}

.ai-hero-facts {
  display: flex;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
  color: var(--color-muted);
  font: 13px/1.4 var(--font-mono);
}

.ai-hero-facts span {
  padding: 0 18px;
  border-right: 1px solid var(--color-border);
}

.ai-hero-facts span:last-child {
  border-right: 0;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading h2 {
  margin: 12px 0 16px;
}

.section-intro {
  max-width: 720px;
  margin-bottom: 0;
  color: var(--color-muted);
}

.ai-lead-grid,
.ai-ending-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, .65fr);
  gap: 34px;
  align-items: start;
}

.ai-prose {
  max-width: none;
  margin: 0;
}

.ai-prose p {
  margin-bottom: 18px;
}

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

.ai-principle-card h3,
.ai-summary-card h3 {
  margin-bottom: 22px;
  font-size: 22px;
}

.signal-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.signal-list li {
  display: grid;
  gap: 2px;
  padding: 14px 0;
  border-top: 1px solid var(--color-border);
}

.signal-list li:first-child {
  padding-top: 0;
  border-top: 0;
}

.signal-list strong {
  color: var(--color-text);
}

.signal-list span {
  color: var(--color-muted);
  font-size: 14px;
}

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

.tool-card {
  position: relative;
  display: flex;
  min-width: 0;
  min-height: 300px;
  flex-direction: column;
  padding: 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
}

.tool-card:nth-child(2n) {
  background: var(--color-panel);
}

.tool-card h3 {
  margin: 14px 0 12px;
  font-size: 25px;
}

.tool-card p {
  margin-bottom: 22px;
  color: var(--color-muted);
}

.tool-code {
  color: var(--color-accent);
  font: 700 12px/1 var(--font-mono);
  letter-spacing: .12em;
}

.tool-note {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--color-border);
  color: var(--color-text);
  font-size: 13px;
}

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

.ai-panel {
  min-height: 390px;
}

.panel-alt {
  background: var(--color-panel);
}

.ai-panel h3 {
  margin-bottom: 14px;
}

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

.ai-panel ol {
  margin: 22px 0 0;
  padding-left: 22px;
}

.ai-panel li {
  margin-bottom: 10px;
}

.ai-callout {
  margin-top: 20px;
}

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

.workflow-item {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 18px;
  padding: 24px 0;
  border-bottom: 1px solid var(--color-border);
}

.workflow-index {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-sm);
  color: var(--color-accent);
  font: 700 14px/1 var(--font-mono);
}

.workflow-item h3 {
  margin-bottom: 8px;
  font-size: 22px;
}

.workflow-item p {
  max-width: 760px;
  margin-bottom: 0;
  color: var(--color-muted);
}

.ai-table {
  min-width: 760px;
}

.table-caption {
  margin-top: 14px;
  color: var(--color-muted);
  font-size: 13px;
}

.troubleshoot-list {
  max-width: 900px;
}

.troubleshoot-list details {
  border-top: 1px solid var(--color-border);
}

.troubleshoot-list details:last-child {
  border-bottom: 1px solid var(--color-border);
}

.troubleshoot-list summary {
  padding-top: 19px;
  padding-bottom: 19px;
  font-size: 17px;
}

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

.ai-ending-grid {
  align-items: stretch;
}

.ai-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 28px;
}

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

.ai-summary-card p {
  color: var(--color-muted);
}

.summary-fact,
.summary-refund {
  color: var(--color-accent) !important;
  font: 700 19px/1.35 var(--font-mono);
}

.ai-summary-card a {
  display: inline-flex;
  margin-top: 12px;
  color: var(--color-accent);
  font-weight: 650;
}

.ai-summary-card a:hover {
  color: var(--color-accent-dark);
}

@media (max-width: 820px) {
  .ai-lead-grid,
  .ai-ending-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .tool-grid,
  .dual-panels {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 640px) {
  .ai-hero {
    padding-top: 44px;
    padding-bottom: 40px;
  }

  .ai-hero::after {
    right: -42px;
    bottom: 20px;
  }

  .ai-hero-sub {
    font-size: 17px;
  }

  .ai-hero-actions {
    align-items: stretch;
    flex-direction: column;
    max-width: 310px;
    margin-inline: auto;
    margin-bottom: 25px;
  }

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

  .ai-hero-facts {
    align-items: center;
    flex-direction: column;
    gap: 8px;
  }

  .ai-hero-facts span {
    padding: 0;
    border-right: 0;
  }

  .tool-card,
  .ai-panel,
  .ai-principle-card,
  .ai-summary-card {
    padding: 22px;
  }

  .workflow-item {
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 12px;
  }

  .workflow-index {
    width: 34px;
    height: 34px;
  }
}