.manual-main {
  position: relative;
  overflow-x: clip;
}

.manual-hero {
  position: relative;
  padding-top: clamp(72px, 9vw, 124px);
  padding-bottom: clamp(58px, 7vw, 96px);
  overflow: clip;
  background:
    radial-gradient(circle at 78% 28%, var(--color-accent-soft), transparent 28%),
    radial-gradient(circle at 18% 76%, var(--color-info-soft), transparent 22%),
    var(--color-bg);
}

.manual-hero::before {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid) 1px, transparent 1px);
  background-size: 34px 34px;
  content: "";
  mask-image: linear-gradient(to bottom, var(--color-text), transparent 82%);
  opacity: 0.72;
  pointer-events: none;
}

.manual-hero .reading-wrap {
  position: relative;
  z-index: 1;
}

.manual-hero h1 {
  max-width: 720px;
  color: var(--color-text);
}

.manual-hero h1 .keyword-lock {
  color: var(--color-accent);
}

.manual-lead {
  max-width: 760px;
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.85;
}

.manual-lead a {
  color: var(--color-accent-dark);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.manual-fact-row {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.manual-layout {
  position: relative;
  padding-top: 18px;
  padding-bottom: clamp(88px, 10vw, 144px);
}

.manual-layout > .toc-tabs {
  margin-inline: auto;
}

.manual-article {
  width: 100%;
  max-width: var(--reading-width);
  margin-inline: auto;
}

.manual-section {
  position: relative;
  padding-top: clamp(64px, 8vw, 104px);
  padding-bottom: 20px;
}

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

.manual-index {
  margin-bottom: 14px;
  display: inline-flex;
  min-height: 30px;
  padding: 0 11px;
  align-items: center;
  border-radius: var(--radius-pill);
  color: var(--color-accent-dark);
  background: var(--color-accent-soft);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.08em;
}

.manual-article h2 {
  margin-top: 0;
  margin-bottom: 28px;
}

.manual-article h3 {
  margin-top: 42px;
  margin-bottom: 14px;
  font-size: clamp(21px, 2.8vw, 27px);
}

.manual-article p,
.manual-article li {
  font-size: 16px;
  line-height: 1.9;
}

.manual-article p {
  margin-bottom: 22px;
}

.manual-article .table-scroll {
  margin: 34px 0;
}

.manual-article .callout {
  margin-top: 34px;
  margin-bottom: 34px;
}

.manual-article pre {
  margin-top: 32px;
  margin-bottom: 32px;
}

.route-scenario-grid {
  margin: 34px 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.route-scenario {
  padding: 24px;
  border-radius: var(--radius-large);
  background: var(--color-panel);
  box-shadow: var(--shadow-card);
}

.route-scenario:nth-child(even) {
  background: var(--color-panel-soft);
}

.route-scenario h3 {
  margin-top: 16px;
  margin-bottom: 10px;
  font-size: 20px;
}

.route-scenario p {
  margin-bottom: 0;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.75;
}

@media (max-width: 768px) {
  .manual-hero {
    padding-top: 56px;
    padding-bottom: 64px;
  }

  .manual-hero::before {
    background-size: 28px 28px;
  }

  .manual-lead {
    font-size: 16px;
    line-height: 1.75;
  }

  .manual-layout {
    padding-top: 10px;
    padding-bottom: 96px;
  }

  .manual-section {
    padding-top: 72px;
  }

  .manual-article p,
  .manual-article li {
    font-size: 15px;
    line-height: 1.85;
  }

  .route-scenario-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .manual-fact-row {
    align-items: flex-start;
  }

  .manual-fact-row .badge {
    width: auto;
  }

  .manual-article .table-scroll {
    border-radius: var(--radius-medium);
  }

  .manual-article .callout {
    padding: 20px;
  }

  .route-scenario {
    padding: 22px;
  }
}