.deepdoc-hero {
  position: relative;
  overflow-x: clip;
  padding-top: clamp(68px, 9vw, 118px);
  padding-bottom: clamp(54px, 7vw, 92px);
  border-bottom: 1px solid var(--color-line);
}

.deepdoc-hero::before {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 78% 48%, color-mix(in srgb, var(--color-warning) 10%, transparent), transparent 30%),
    linear-gradient(90deg, transparent, color-mix(in srgb, var(--color-panel) 48%, transparent));
  content: "";
}

.deepdoc-hero-grid {
  position: relative;
  display: grid;
  align-items: center;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, .8fr);
  gap: clamp(38px, 6vw, 84px);
}

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

.deepdoc-hero-copy h1 {
  max-width: 11em;
}

.deepdoc-hero-copy .lead {
  margin-top: 24px;
}

.deepdoc-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 28px;
}

.deepdoc-map-card {
  position: relative;
  min-width: 0;
  padding: clamp(24px, 4vw, 38px);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  box-shadow: var(--shadow-panel);
}

.deepdoc-map-card::before {
  position: absolute;
  inset: 12px;
  pointer-events: none;
  border: 1px solid color-mix(in srgb, var(--color-line) 55%, transparent);
  border-radius: var(--radius-sm);
  content: "";
}

.map-card-head,
.decision-axis,
.deepdoc-map-card > p {
  position: relative;
  z-index: 1;
}

.map-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--color-line);
  color: var(--color-text-soft);
  font-size: 12px;
}

.decision-axis {
  position: relative;
  display: grid;
  gap: 18px;
  margin-top: 24px;
}

.decision-axis::before {
  position: absolute;
  top: 12px;
  bottom: 12px;
  left: 8px;
  width: 1px;
  background: var(--color-line);
  content: "";
}

.decision-node {
  position: relative;
  display: grid;
  align-items: center;
  grid-template-columns: 18px 1fr;
  gap: 14px;
}

.decision-mark {
  position: relative;
  z-index: 1;
  width: 17px;
  height: 17px;
  border: 4px solid var(--color-panel);
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 1px var(--color-accent);
}

.decision-node div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
}

.decision-node strong {
  color: var(--color-text);
  font-size: 15px;
}

.decision-node small {
  color: var(--color-text-soft);
  font-family: var(--font-mono);
  font-size: 11px;
}

.deepdoc-map-card > p {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--color-line);
  color: var(--color-text-soft);
  font-size: 13px;
}

.toc-wrap {
  position: relative;
  z-index: 20;
  padding-top: 20px;
  padding-bottom: 20px;
}

.deepdoc-body {
  padding-top: clamp(48px, 7vw, 84px);
  padding-bottom: clamp(72px, 9vw, 124px);
}

.manual-intro {
  padding-bottom: clamp(44px, 6vw, 72px);
  border-bottom: 1px solid var(--color-line);
  color: var(--color-text-soft);
  font-size: 17px;
}

.manual-intro > p {
  line-height: 1.9;
}

.manual-intro a,
.manual-section a {
  color: var(--color-accent-deep);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.manual-intro .callout {
  margin-top: 26px;
  font-size: 15px;
}

.manual-section {
  padding-top: clamp(64px, 9vw, 108px);
  padding-bottom: clamp(58px, 8vw, 96px);
  border-bottom: 1px solid var(--color-line);
}

.manual-section:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.chapter-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 15px;
  color: var(--color-accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .12em;
}

.chapter-kicker::before {
  width: 28px;
  height: 3px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  content: "";
}

.manual-section h2 {
  margin-bottom: 34px;
}

.manual-section h3 {
  margin-top: 42px;
  margin-bottom: 14px;
  font-size: clamp(21px, 2.5vw, 27px);
}

.manual-section h2 + h3 {
  margin-top: 0;
}

.manual-section p {
  color: var(--color-text);
  line-height: 1.9;
}

.manual-section p + p {
  margin-top: 18px;
}

.manual-section .table-scroll,
.manual-section pre,
.manual-section .callout,
.checklist-panel {
  margin-top: 28px;
  margin-bottom: 28px;
}

.manual-section pre {
  padding: 20px;
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  color: var(--color-text);
  background: var(--color-panel-soft);
  font-size: 13px;
  line-height: 1.7;
  -webkit-overflow-scrolling: touch;
}

.manual-section code {
  color: var(--color-text);
}

.manual-section .compare-table {
  min-width: 720px;
}

.manual-section .compare-table td {
  line-height: 1.6;
}

.checklist-panel {
  padding: clamp(24px, 4vw, 38px);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background:
    linear-gradient(color-mix(in srgb, var(--color-accent) 5%, transparent), transparent),
    var(--color-panel);
  box-shadow: 0 1px 2px var(--color-shadow-soft);
}

.checklist-panel h3 {
  margin-top: 28px;
  font-size: 20px;
}

.checklist-panel h3:first-child {
  margin-top: 0;
}

.checklist-panel ul {
  display: grid;
  gap: 11px;
  margin-top: 14px;
}

.checklist-panel li {
  position: relative;
  padding-left: 24px;
  color: var(--color-text-soft);
  line-height: 1.75;
}

.checklist-panel li::before {
  position: absolute;
  top: .72em;
  left: 0;
  width: 9px;
  height: 9px;
  border: 2px solid var(--color-accent);
  border-radius: 50%;
  content: "";
}

@media (max-width: 900px) {
  .deepdoc-hero-grid {
    grid-template-columns: 1fr;
  }

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

  .deepdoc-map-card {
    max-width: 640px;
  }
}

@media (max-width: 640px) {
  .deepdoc-hero {
    padding-top: 54px;
    padding-bottom: 48px;
  }

  .deepdoc-hero-copy h1 {
    max-width: none;
  }

  .deepdoc-map-card {
    padding: 22px;
  }

  .deepdoc-map-card::before {
    inset: 8px;
  }

  .map-card-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .decision-node div {
    align-items: flex-start;
    flex-direction: column;
    gap: 2px;
  }

  .toc-wrap {
    padding-inline: 0;
  }

  .manual-intro {
    font-size: 16px;
  }

  .manual-section h2 {
    margin-bottom: 28px;
  }

  .manual-section h3 {
    margin-top: 36px;
  }

  .manual-section pre {
    padding: 16px;
    font-size: 12px;
  }
}