.deepdoc-hero {
  position: relative;
  padding-top: clamp(72px, 9vw, 116px);
  padding-bottom: clamp(52px, 7vw, 88px);
  overflow-x: clip;
  border-bottom: 1px solid var(--color-line);
  background:
    radial-gradient(circle at 18% 18%, var(--color-blue-glow), transparent 34%),
    radial-gradient(circle at 82% 72%, var(--color-blue-glow-soft), transparent 30%),
    var(--color-canvas);
}

.deepdoc-hero::after {
  content: "";
  position: absolute;
  right: max(var(--gutter), calc((100% - var(--reading-width)) / 2 - 120px));
  bottom: 34px;
  width: 150px;
  height: 94px;
  border: 1px solid var(--color-brand-line);
  border-radius: var(--radius-xlarge);
  pointer-events: none;
}

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

.deepdoc-hero h1 {
  max-width: 760px;
}

.deepdoc-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 26px;
}

.deepdoc-intro {
  padding-top: 54px;
  padding-bottom: 34px;
}

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

.deepdoc-article > .section {
  scroll-margin-top: var(--header-height);
}

.deepdoc-section-alt {
  background: var(--color-panel);
}

.chapter-index {
  display: inline-flex;
  margin-bottom: 14px;
  color: var(--color-brand-deep);
  font: 800 12px/1.4 var(--font-mono);
  letter-spacing: .08em;
}

.deepdoc-article .prose > h2:first-of-type {
  margin-top: 0;
}

.deepdoc-article .prose h2 {
  margin-bottom: 24px;
}

.deepdoc-article .prose h3 {
  margin-bottom: 13px;
  font-size: clamp(20px, 2.2vw, 25px);
}

.deepdoc-article .prose p {
  color: var(--color-ink);
}

.deepdoc-article .prose p + p {
  margin-top: 1.15em;
}

.deepdoc-article .prose .callout,
.deepdoc-article .prose .table-scroll,
.deepdoc-article .prose pre {
  margin-top: 28px;
  margin-bottom: 28px;
}

.deepdoc-article .prose .data-table {
  margin-bottom: 0;
  background: var(--color-canvas);
}

.deepdoc-article .prose .data-table td {
  color: var(--color-ink-muted);
  font-size: 14px;
}

.deepdoc-article pre code {
  font-family: var(--font-mono);
}

.deepdoc-section-alt pre,
.deepdoc-section-alt .table-scroll {
  border-color: var(--color-brand-line);
}

@media (max-width: 768px) {
  .deepdoc-hero {
    padding-top: 62px;
    padding-bottom: 58px;
  }

  .deepdoc-hero::after {
    right: var(--gutter);
    bottom: 18px;
    width: 92px;
    height: 58px;
    opacity: .55;
  }

  .deepdoc-intro {
    padding-top: 44px;
    padding-bottom: 20px;
  }

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

@media (max-width: 640px) {
  .deepdoc-meta {
    gap: 7px;
  }

  .deepdoc-article .prose .callout {
    padding: 50px 18px 18px;
  }

  .deepdoc-article .prose .callout::before {
    top: 17px;
    left: 18px;
  }
}