.manual-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
  background:
    radial-gradient(circle at top right, var(--color-accent-soft), var(--white-zero) 42%),
    linear-gradient(180deg, var(--color-panel), var(--color-bg));
}

.manual-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 42px 42px;
  opacity: 0.28;
  pointer-events: none;
}

.manual-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  gap: clamp(30px, 6vw, 72px);
  align-items: center;
  min-height: 590px;
  padding-top: 54px;
  padding-bottom: 54px;
}

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

.manual-hero-copy h1 {
  max-width: 760px;
  margin-top: 20px;
}

.manual-lede {
  max-width: 700px;
  color: var(--color-text-muted);
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.75;
}

.manual-route {
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-panel);
  box-shadow: var(--shadow-card);
}

.manual-route-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 21px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel-alt);
  color: var(--color-text-muted);
  font-size: 14px;
}

.manual-route-head strong {
  color: var(--color-accent-dark);
}

.manual-route ol {
  margin: 0;
  padding: 13px;
  list-style: none;
}

.manual-route li {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 13px;
  margin: 0;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-size: 14px;
  font-weight: 650;
}

.manual-route li:nth-child(3n + 1) span {
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
}

.manual-route li:nth-child(3n + 2) span {
  background: var(--color-warning-soft);
  color: var(--color-warning-text);
}

.manual-route li:nth-child(3n) span {
  background: var(--color-panel-alt);
  color: var(--color-text);
  box-shadow: inset 3px 0 var(--color-violet);
}

.manual-route li span {
  display: grid;
  width: 34px;
  height: 28px;
  flex: 0 0 34px;
  place-items: center;
  border-radius: var(--radius-xs);
  font: 700 11px/1 var(--font-mono);
}

.manual-intro {
  display: grid;
  grid-template-columns: minmax(220px, 0.65fr) minmax(0, 1.35fr);
  gap: clamp(24px, 5vw, 58px);
  align-items: start;
}

.manual-intro h2 {
  margin-top: 16px;
  margin-bottom: 0;
}

.manual-intro p {
  color: var(--color-text);
}

.manual-intro p:last-child {
  margin-bottom: 0;
}

.manual-toc-section {
  position: relative;
  z-index: 21;
  padding-top: 0;
  padding-bottom: 0;
}

.manual-toc-section .toc-tabs {
  top: 12px;
}

.manual-article {
  padding-top: clamp(54px, 7vw, 88px);
}

.manual-chapter {
  position: relative;
  margin-bottom: clamp(76px, 10vw, 118px);
  padding-top: 4px;
}

.manual-chapter:last-child {
  margin-bottom: 0;
}

.chapter-marker {
  display: inline-grid;
  min-width: 52px;
  height: 34px;
  margin-bottom: 15px;
  padding-inline: 12px;
  place-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
  font: 750 13px/1 var(--font-mono);
  box-shadow: var(--shadow-soft);
}

.manual-chapter h2 {
  margin-top: 0;
  scroll-margin-top: 105px;
}

.manual-chapter h2::after {
  content: "";
  display: block;
  width: 74px;
  height: 4px;
  margin-top: 18px;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--color-accent), var(--color-warning));
}

.manual-chapter h3 {
  margin-top: 2em;
}

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

.manual-chapter pre {
  margin-top: 24px;
  margin-bottom: 28px;
  box-shadow: var(--shadow-soft);
}

.manual-chapter .table-wrap {
  margin-top: 28px;
  margin-bottom: 32px;
  box-shadow: var(--shadow-soft);
}

.mode-comparison {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 30px;
  margin-bottom: 34px;
}

.mode-block {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  box-shadow: var(--shadow-soft);
}

.mode-block:nth-child(2) {
  background: var(--color-warning-soft);
}

.mode-block:nth-child(3) {
  background: var(--color-panel-alt);
}

.mode-block h3 {
  margin-top: 16px;
}

.mode-block p {
  margin-bottom: 0;
  color: var(--color-text-muted);
  text-align: left;
}

.manual-finish {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: center;
  margin-top: 48px;
  padding: clamp(22px, 4vw, 34px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: var(--color-panel-alt);
  box-shadow: var(--shadow-card);
}

.manual-finish h3 {
  margin-top: 15px;
}

.manual-finish p {
  max-width: 560px;
  margin-bottom: 0;
  color: var(--color-text-muted);
  text-align: left;
}

.manual-finish .actions {
  justify-content: flex-end;
}

@media (max-width: 900px) {
  .manual-hero-grid {
    grid-template-columns: minmax(0, 1fr);
    min-height: auto;
    padding-top: 68px;
  }

  .manual-route {
    max-width: 620px;
  }

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

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

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

  .manual-finish .actions {
    justify-content: flex-start;
  }
}

@media (max-width: 640px) {
  .manual-hero-grid {
    gap: 32px;
    padding-top: 48px;
    padding-bottom: 32px;
  }

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

  .manual-route li {
    align-items: flex-start;
  }

  .manual-toc-section {
    padding-inline: 0;
  }

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

  .manual-chapter .data-table {
    font-size: 14px;
  }

  .manual-finish .actions {
    align-items: stretch;
  }
}