.deepdoc-hero {
  padding-top: 82px;
  padding-bottom: 76px;
  border-bottom: 1px solid var(--color-border);
  overflow-x: clip;
}

.deepdoc-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  align-items: end;
  gap: clamp(42px, 7vw, 110px);
}

.deepdoc-intro {
  max-width: 850px;
}

.deepdoc-intro h1 {
  max-width: 820px;
}

.deepdoc-actions {
  margin-top: 30px;
}

.deepdoc-scope {
  padding: 25px;
  border: 1px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  box-shadow: var(--shadow-card);
}

.deepdoc-scope-label {
  margin-bottom: 18px;
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.deepdoc-scope dl {
  margin: 0;
}

.deepdoc-scope dl > div {
  padding-top: 14px;
  padding-bottom: 14px;
  border-top: 1px solid var(--color-border);
  display: grid;
  grid-template-columns: minmax(82px, 0.38fr) minmax(0, 1fr);
  gap: 14px;
}

.deepdoc-scope dt {
  color: var(--color-muted-light);
  font-family: var(--font-mono);
  font-size: 11px;
}

.deepdoc-scope dd {
  margin: 0;
  color: var(--color-text);
  font-size: 13px;
}

.deepdoc-nav-section {
  padding-top: 28px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel-soft);
}

.deepdoc-nav-section .toc {
  top: 8px;
}

.deepdoc-body-section {
  padding-top: 80px;
}

.deepdoc-article {
  font-size: 16px;
  line-height: 1.86;
}

.deepdoc-preface {
  margin-bottom: 86px;
  padding: clamp(24px, 4vw, 38px);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: var(--color-panel);
}

.deepdoc-preface p:last-child {
  margin-bottom: 0;
}

.deepdoc-chapter {
  padding-top: 22px;
}

.deepdoc-chapter + .deepdoc-chapter {
  margin-top: 94px;
  padding-top: 94px;
  border-top: 1px solid var(--color-border);
}

.deepdoc-chapter h2 {
  max-width: 800px;
  margin-top: 0;
  margin-bottom: 40px;
}

.deepdoc-chapter h3 {
  margin-top: 42px;
  font-weight: var(--weight-medium);
}

.deepdoc-chapter p {
  text-align: justify;
  text-justify: inter-ideograph;
}

.deepdoc-chapter .table-wrap {
  margin-top: 34px;
  margin-bottom: 34px;
}

.deepdoc-chapter pre {
  margin-top: 30px;
  margin-bottom: 30px;
}

.deepdoc-decision-grid {
  margin-top: 38px;
  margin-bottom: 38px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  overflow: hidden;
  background: var(--color-border);
  gap: 1px;
}

.deepdoc-decision-grid > div {
  padding: 25px;
  background: var(--color-panel);
}

.deepdoc-decision-grid h3 {
  margin-top: 0;
  margin-bottom: 10px;
  color: var(--color-accent-dark);
  font-size: 18px;
}

.deepdoc-decision-grid p {
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: 14px;
  text-align: left;
}

@media (max-width: 900px) {
  .deepdoc-hero {
    padding-top: 64px;
    padding-bottom: 64px;
  }

  .deepdoc-hero-grid {
    grid-template-columns: 1fr;
  }

  .deepdoc-scope {
    max-width: 620px;
  }
}

@media (max-width: 640px) {
  .deepdoc-hero {
    padding-top: 52px;
    padding-bottom: 52px;
  }

  .deepdoc-nav-section {
    padding-top: 20px;
    padding-bottom: 20px;
  }

  .deepdoc-body-section {
    padding-top: 58px;
  }

  .deepdoc-article {
    font-size: 15px;
    line-height: 1.82;
  }

  .deepdoc-preface {
    margin-bottom: 64px;
  }

  .deepdoc-chapter + .deepdoc-chapter {
    margin-top: 68px;
    padding-top: 68px;
  }

  .deepdoc-chapter h2 {
    margin-bottom: 30px;
  }

  .deepdoc-chapter h3 {
    margin-top: 34px;
  }

  .deepdoc-chapter p {
    text-align: left;
  }

  .deepdoc-decision-grid {
    grid-template-columns: 1fr;
  }

  .deepdoc-scope dl > div {
    grid-template-columns: 78px minmax(0, 1fr);
  }
}