.deepdoc-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
  background-image:
    linear-gradient(var(--color-grid) 1px, var(--color-transparent) 1px),
    linear-gradient(90deg, var(--color-grid) 1px, var(--color-transparent) 1px);
  background-size: 72px 72px;
}

.deepdoc-hero::after {
  position: absolute;
  right: -120px;
  bottom: -180px;
  width: 520px;
  height: 420px;
  background:
    radial-gradient(closest-side at 38% 55%, var(--color-glow-orange), var(--color-transparent) 72%),
    radial-gradient(closest-side at 64% 42%, var(--color-glow-violet), var(--color-transparent) 70%);
  content: "";
  filter: blur(58px);
  opacity: 0.42;
  pointer-events: none;
}

.deepdoc-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  min-height: 610px;
  grid-template-columns: minmax(0, 0.86fr) minmax(420px, 0.72fr);
  align-items: center;
  gap: 72px;
  padding-top: 82px;
  padding-bottom: 82px;
}

.deepdoc-hero-copy h1 {
  max-width: 650px;
  font-size: clamp(34px, 3.3vw, 48px);
}

.deepdoc-hero-copy .lead {
  margin-bottom: 28px;
}

.deepdoc-hero-copy .button-row {
  margin-bottom: 24px;
}

.deepdoc-map {
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-large);
  background: var(--color-panel);
  box-shadow: var(--shadow-card);
}

.deepdoc-map-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border-bottom: 1px solid var(--color-border);
  padding: 14px 18px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
}

.deepdoc-map-list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 8px;
  list-style: none;
}

.deepdoc-map-list li {
  display: grid;
  min-height: 58px;
  grid-template-columns: 32px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  border-radius: var(--radius-small);
  padding: 10px 12px;
  color: var(--color-text-muted);
}

.deepdoc-map-list li > span {
  font-family: var(--font-mono);
  font-size: 10px;
}

.deepdoc-map-list strong {
  color: var(--color-text);
  font-size: 14px;
}

.deepdoc-map-list code {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 10px;
}

.deepdoc-map-list .is-active {
  background: var(--color-accent);
  color: var(--color-ink);
}

.deepdoc-map-list .is-active strong,
.deepdoc-map-list .is-active code {
  color: var(--color-ink);
}

.deepdoc-map-note {
  margin: 0;
  border-top: 1px solid var(--color-border);
  padding: 15px 18px 18px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
}

.deepdoc-index {
  padding-top: 88px;
  padding-bottom: 72px;
}

.deepdoc-intro {
  display: grid;
  grid-template-columns: minmax(240px, 0.42fr) minmax(0, 1fr);
  gap: 64px;
  margin-bottom: 38px;
}

.deepdoc-intro h2 {
  margin-bottom: 0;
}

.deepdoc-intro a {
  color: var(--color-ink);
  font-weight: 750;
  text-decoration: underline;
  text-decoration-color: var(--color-accent-deep);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.deepdoc-toc {
  margin-bottom: 28px;
}

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

.deepdoc-article {
  padding-top: 84px;
  padding-bottom: 104px;
}

.manual-chapter {
  scroll-margin-top: calc(var(--header-height) + 24px);
}

.manual-chapter + .manual-chapter {
  border-top: 1px solid var(--color-paper-border);
  margin-top: 88px;
  padding-top: 88px;
}

.chapter-number {
  margin-bottom: 12px;
  color: var(--color-ink);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
}

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

.manual-chapter h3 {
  margin-top: 42px;
  margin-bottom: 14px;
  font-size: 23px;
}

.manual-chapter p {
  margin-bottom: 20px;
}

.manual-chapter pre,
.manual-chapter .table-wrap,
.manual-chapter .callout {
  margin-top: 30px;
  margin-bottom: 34px;
}

.manual-chapter .table-wrap code {
  white-space: nowrap;
}

.deepdoc-next {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 32px;
  border: 1px solid var(--color-paper-border);
  border-radius: var(--radius-large);
  background: var(--color-paper-soft);
  margin-top: 96px;
  padding: 32px;
}

.deepdoc-next h2 {
  margin-bottom: 10px;
  font-size: 30px;
}

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

.deepdoc-next .button-row {
  justify-content: flex-end;
}

@media (max-width: 980px) {
  .deepdoc-hero-inner {
    min-height: auto;
    grid-template-columns: minmax(0, 1fr);
    gap: 48px;
  }

  .deepdoc-map {
    max-width: 680px;
  }

  .deepdoc-intro {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }
}

@media (max-width: 760px) {
  .deepdoc-hero-inner {
    padding-top: 64px;
    padding-bottom: 64px;
  }

  .deepdoc-map-list li {
    grid-template-columns: 28px minmax(0, 1fr);
  }

  .deepdoc-map-list code {
    grid-column: 2;
  }

  .deepdoc-next {
    grid-template-columns: minmax(0, 1fr);
  }

  .deepdoc-next .button-row {
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  .deepdoc-hero-copy h1 {
    font-size: clamp(26px, 8vw, 30px);
  }

  .deepdoc-index {
    padding-top: 64px;
    padding-bottom: 56px;
  }

  .deepdoc-article {
    padding-top: 64px;
    padding-bottom: 72px;
  }

  .manual-chapter + .manual-chapter {
    margin-top: 64px;
    padding-top: 64px;
  }

  .manual-chapter h3 {
    margin-top: 34px;
    font-size: 21px;
  }

  .deepdoc-next {
    margin-top: 72px;
    padding: 22px;
  }

  .deepdoc-next h2 {
    font-size: 26px;
  }
}