.deepdoc-hero {
  position: relative;
  overflow-x: clip;
  padding-top: 88px;
  padding-bottom: 82px;
  border-bottom: 1px solid var(--color-border);
}

.deepdoc-hero::before {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(90deg, var(--color-accent-line) 0 1px, transparent 1px 18px);
  content: "";
  mask-image: linear-gradient(90deg, transparent, var(--color-text), transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, var(--color-text), transparent);
  opacity: 0.55;
}

.deepdoc-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.65fr);
  align-items: center;
  gap: 72px;
}

.deepdoc-title {
  min-width: 0;
}

.deepdoc-title h1 {
  max-width: 760px;
  margin-top: 20px;
  margin-bottom: 24px;
}

.deepdoc-lead {
  max-width: 720px;
  margin-bottom: 28px;
  color: var(--color-text-muted);
  font-size: 18px;
  line-height: 1.85;
}

.deepdoc-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.decision-sheet {
  position: relative;
  display: grid;
  min-width: 0;
  gap: 6px;
  padding: 30px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-panel);
  box-shadow: var(--shadow-core);
}

.decision-sheet::before {
  position: absolute;
  top: 28px;
  bottom: 28px;
  left: -12px;
  width: 4px;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  content: "";
}

.decision-sheet .mono-label {
  margin-bottom: 14px;
}

.decision-line {
  display: grid;
  gap: 2px;
  padding-top: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--color-border);
}

.decision-line:last-child {
  border-bottom: 0;
}

.decision-line strong {
  font-family: var(--font-display);
  font-size: 16px;
}

.decision-line span {
  color: var(--color-text-muted);
  font-size: 14px;
}

.deepdoc-body {
  position: relative;
  padding-top: 44px;
  padding-bottom: var(--section-space);
}

.deepdoc-section {
  max-width: 940px;
  margin-inline: auto;
  padding-top: 82px;
  padding-bottom: 34px;
  color: var(--color-text-muted);
}

.deepdoc-section + .deepdoc-section {
  border-top: 1px solid var(--color-border);
}

.section-index {
  margin-bottom: 12px;
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.11em;
}

.deepdoc-section h2 {
  max-width: 840px;
  margin-bottom: 32px;
}

.deepdoc-section h3 {
  margin-top: 42px;
  margin-bottom: 14px;
  font-size: 24px;
}

.deepdoc-section p {
  margin-bottom: 1.3em;
  line-height: 1.88;
}

.deepdoc-section > p,
.deepdoc-section > h3,
.deepdoc-section > pre {
  max-width: 820px;
}

.deepdoc-section a {
  font-weight: 650;
  text-decoration: underline;
  text-decoration-color: var(--color-accent-soft);
  text-underline-offset: 4px;
}

.deepdoc-section .table-scroll {
  margin-top: 32px;
  margin-bottom: 38px;
}

.deepdoc-section pre {
  margin-top: 24px;
  margin-bottom: 28px;
}

.support-checklist {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 30px;
  margin-bottom: 38px;
}

.support-checklist > div {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  box-shadow: var(--shadow-card);
}

.support-checklist strong {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-display);
}

.support-checklist p {
  margin-bottom: 0;
  font-size: 14px;
}

.final-callout {
  margin-top: 46px;
  border-left-color: var(--color-success);
  background: var(--color-success-soft);
}

@media (max-width: 960px) {
  .deepdoc-hero-grid {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .decision-sheet {
    max-width: 680px;
  }
}

@media (max-width: 768px) {
  .deepdoc-hero {
    padding-top: 64px;
    padding-bottom: 64px;
  }

  .deepdoc-lead {
    font-size: 16px;
  }

  .deepdoc-body {
    padding-top: 28px;
  }

  .deepdoc-section {
    padding-top: 68px;
  }

  .deepdoc-section h3 {
    margin-top: 36px;
    font-size: 22px;
  }

  .support-checklist {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .deepdoc-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .deepdoc-actions .btn-secondary {
    width: 100%;
  }

  .decision-sheet {
    padding: 24px;
  }

  .decision-sheet::before {
    left: -6px;
  }

  .deepdoc-section {
    padding-top: 56px;
    padding-bottom: 24px;
  }

  .deepdoc-section h2 {
    margin-bottom: 26px;
  }

  .deepdoc-section h3 {
    font-size: 20px;
  }

  .support-checklist > div {
    padding: 20px;
  }
}