.deepdoc-hero {
  position: relative;
  padding-top: 72px;
  padding-bottom: 64px;
  overflow: hidden;
  border-bottom: 1px solid var(--color-line);
  background:
    linear-gradient(var(--color-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-line) 1px, transparent 1px),
    var(--color-page);
  background-size: 44px 44px;
}

.deepdoc-hero::after {
  position: absolute;
  right: 8%;
  bottom: 0;
  width: 3px;
  height: 72%;
  background: var(--color-accent);
  content: "";
}

.deepdoc-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(360px, 0.85fr);
  align-items: end;
  gap: 64px;
}

.deepdoc-intro h1 {
  max-width: 820px;
  margin-top: 18px;
}

.deepdoc-intro .lead {
  max-width: 760px;
  margin-top: 24px;
}

.deepdoc-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 28px;
}

.reference-plate {
  min-width: 0;
  padding: 24px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-page);
  box-shadow: var(--shadow-card);
}

.reference-plate-head {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-line);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.reference-route {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 7px;
  padding-block: 34px;
}

.reference-route i {
  height: 1px;
  min-width: 12px;
  flex: 1 1 auto;
  background: var(--color-ink);
}

.reference-node {
  display: grid;
  min-width: 50px;
  min-height: 50px;
  place-items: center;
  border: 1px solid var(--color-ink);
  border-radius: var(--radius-pill);
  background: var(--color-page);
  font-size: 12px;
  font-weight: 800;
}

.reference-node.is-key {
  border-color: var(--color-accent);
  background: var(--color-accent);
  color: var(--color-on-dark);
}

.reference-scale {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  padding-top: 14px;
  border-top: 1px solid var(--color-line);
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 9px;
  text-align: center;
}

.deepdoc-layout {
  padding-top: 32px;
  padding-bottom: var(--section-space);
}

.deepdoc-layout > .toc-tabs {
  top: 8px;
  margin-bottom: 56px;
}

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

.doc-preface {
  padding: 28px;
  border: 1px solid var(--color-line);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
}

.doc-preface p + p {
  margin-top: 16px;
}

.doc-section {
  padding-top: 72px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-line);
}

.doc-section:last-child {
  border-bottom: 0;
}

.doc-section > h2 {
  margin-top: 8px;
  margin-bottom: 34px;
}

.doc-section > h3 {
  margin-top: 38px;
  padding-top: 15px;
  border-top: 1px solid var(--color-line);
  font-size: 24px;
}

.doc-section > p + p {
  margin-top: 18px;
}

.doc-section > h3 + p {
  margin-top: 18px;
}

.section-code {
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.deepdoc-article .callout,
.deepdoc-article .table-scroll,
.deepdoc-article pre,
.route-diagram,
.diagnostic-grid {
  margin-top: 30px;
  margin-bottom: 30px;
}

.deepdoc-article pre {
  position: relative;
  padding: 46px 22px 22px;
  border: 1px solid var(--color-ink);
  border-radius: var(--radius-sm);
  background: var(--color-ink);
  color: var(--color-on-dark);
}

.deepdoc-article pre::before {
  position: absolute;
  top: 15px;
  left: 20px;
  color: var(--color-channel-yellow);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  content: "TX TERMINAL";
}

.route-diagram {
  display: grid;
  gap: 8px;
  padding: 10px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-panel);
}

.route-diagram > div {
  display: grid;
  grid-template-columns: 90px minmax(0, 1fr);
  align-items: center;
  gap: 20px;
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-page);
}

.route-diagram p {
  color: var(--color-muted);
  font-family: var(--font-mono);
  font-size: 13px;
}

.route-label {
  display: inline-flex;
  min-height: 34px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-xs);
  background: var(--color-ink);
  color: var(--color-on-dark);
  font-weight: 800;
}

.diagnostic-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.diagnostic-grid article {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-panel);
}

.diagnostic-grid h3 {
  margin-bottom: 10px;
  font-size: 19px;
}

.diagnostic-grid p {
  color: var(--color-muted);
  font-size: 15px;
  line-height: 1.75;
}

.deepdoc-article .table-scroll {
  max-width: 100%;
}

.deepdoc-article .data-table,
.deepdoc-article .compare-table {
  font-size: 14px;
  line-height: 1.6;
}

@media (max-width: 900px) {
  .deepdoc-hero-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 42px;
  }

  .reference-plate {
    max-width: 680px;
  }
}

@media (max-width: 768px) {
  .deepdoc-hero {
    padding-top: 52px;
    padding-bottom: 48px;
    background-size: 32px 32px;
  }

  .deepdoc-hero::after {
    display: none;
  }

  .deepdoc-layout {
    padding-top: 20px;
  }

  .deepdoc-layout > .toc-tabs {
    margin-inline: calc(var(--gutter) * -1);
    margin-bottom: 38px;
  }

  .doc-section {
    padding-top: 56px;
  }

  .doc-preface {
    padding: 22px;
  }

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

@media (max-width: 560px) {
  .reference-plate {
    padding: 18px;
  }

  .reference-plate-head span:last-child {
    display: none;
  }

  .reference-route {
    gap: 4px;
    padding-block: 26px;
  }

  .reference-node {
    min-width: 42px;
    min-height: 42px;
    font-size: 11px;
  }

  .reference-scale {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

  .deepdoc-badges {
    align-items: flex-start;
    flex-direction: column;
  }

  .route-diagram > div {
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .route-label {
    width: fit-content;
    min-width: 78px;
  }

  .doc-section > h3 {
    font-size: 21px;
  }
}

@media (max-width: 360px) {
  .reference-node {
    min-width: 38px;
    min-height: 38px;
  }

  .reference-route i {
    min-width: 5px;
  }

  .reference-scale {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .deepdoc-hero {
    background-position: initial;
  }
}