.deepdoc {
  min-width: 0;
}

.deepdoc-hero {
  min-height: 580px;
  position: relative;
  overflow: hidden;
  border-bottom: 6px solid var(--color-border);
  background:
    linear-gradient(var(--color-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid) 1px, transparent 1px),
    var(--color-bg);
  background-size: 88px 88px;
}

.deepdoc-hero-grid {
  min-height: 470px;
  padding-top: clamp(70px, 9vw, 122px);
  padding-bottom: 90px;
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.55fr);
  align-items: start;
  gap: clamp(42px, 8vw, 112px);
}

.deepdoc-heading,
.deepdoc-scope {
  min-width: 0;
  position: relative;
  z-index: 3;
}

.deepdoc-heading h1 {
  max-width: 820px;
  margin-bottom: 24px;
  position: relative;
  font-size: clamp(52px, 6vw, 72px);
}

.deepdoc-heading h1::after {
  content: "";
  width: min(360px, 72%);
  height: 6px;
  position: absolute;
  bottom: -13px;
  left: 0;
  background: var(--color-accent);
}

.deepdoc-deck {
  max-width: 760px;
  margin: 34px 0 0;
  color: var(--color-text-muted);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.8;
}

.deepdoc-meta {
  margin-top: 30px;
  padding-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  border-top: 2px solid var(--color-border);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.07em;
}

.deepdoc-scope {
  margin-top: 20px;
  padding: 26px;
  border-top: 5px solid var(--color-accent);
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
  background: var(--color-panel-solid);
  box-shadow: var(--shadow-panel);
}

.scope-label,
.rail-title {
  margin-bottom: 16px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.12em;
}

.deepdoc-scope > p:not(.scope-label) {
  color: var(--color-text-muted);
}

.deepdoc-scope a,
.deepdoc-rail a {
  color: var(--color-text);
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.deepdoc-scope dl {
  margin: 25px 0 0;
}

.deepdoc-scope dl div {
  padding: 13px 0;
  display: grid;
  grid-template-columns: minmax(70px, 0.34fr) minmax(0, 1fr);
  gap: 16px;
  border-top: 1px solid var(--color-border-soft);
}

.deepdoc-scope dt {
  color: var(--color-text);
  font-weight: 740;
}

.deepdoc-scope dd {
  margin: 0;
  color: var(--color-text-muted);
}

.deepdoc-route {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 1;
  pointer-events: none;
}

.deepdoc-route svg {
  width: 100%;
  height: auto;
}

.doc-grid-line {
  fill: none;
  stroke: var(--color-border-soft);
  stroke-width: 1;
  stroke-dasharray: 5 10;
}

.doc-route-underlay {
  fill: none;
  stroke: var(--color-bg);
  stroke-width: 10;
}

.doc-route-line {
  fill: none;
  stroke: var(--color-accent);
  stroke-width: 4;
}

.doc-route-node {
  fill: var(--color-bg-panel);
  stroke: var(--color-text);
  stroke-width: 2;
}

.deepdoc-nav-wrap {
  position: relative;
  z-index: 20;
  padding-top: 24px;
}

.deepdoc-layout {
  padding-top: clamp(62px, 8vw, 106px);
  padding-bottom: var(--section-space);
  display: grid;
  grid-template-columns: minmax(190px, 0.3fr) minmax(0, 1fr);
  align-items: start;
  gap: clamp(38px, 7vw, 96px);
}

.deepdoc-layout > * {
  min-width: 0;
}

.deepdoc-rail {
  position: sticky;
  top: var(--toc-top);
  padding-top: 20px;
  border-top: 5px solid var(--color-accent);
}

.deepdoc-rail p:not(.rail-title) {
  color: var(--color-text-muted);
  font-size: 14px;
}

.deepdoc-rail a {
  display: inline-block;
  margin-top: 10px;
  font-size: 14px;
  font-weight: 720;
}

.deepdoc-content {
  width: 100%;
  min-width: 0;
  max-width: 920px;
}

.deepdoc-section {
  min-width: 0;
  padding-top: clamp(52px, 7vw, 88px);
  padding-bottom: clamp(52px, 7vw, 88px);
  border-top: 5px solid var(--color-border);
}

.deepdoc-section:first-child {
  padding-top: 0;
  border-top-color: var(--color-accent);
}

.deepdoc-section h2 {
  max-width: 820px;
  margin-bottom: 34px;
}

.deepdoc-section h3 {
  margin-top: 42px;
  padding-left: 17px;
  position: relative;
  font-size: clamp(22px, 2.4vw, 29px);
}

.deepdoc-section h3::before {
  content: "";
  width: 5px;
  position: absolute;
  top: 0.18em;
  bottom: 0.18em;
  left: 0;
  background: var(--color-accent);
}

.deepdoc-section p,
.deepdoc-section li {
  color: var(--color-text-muted);
}

.deepdoc-section > p {
  max-width: 840px;
  font-size: 16px;
  line-height: 1.95;
}

.deepdoc-section a {
  color: var(--color-text);
  font-weight: 670;
  text-decoration: underline;
  text-decoration-color: var(--color-accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.deepdoc-section .entry-number {
  margin-bottom: 17px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.12em;
}

.deepdoc-section .compare-table-wrap {
  margin: 38px 0;
}

.deepdoc-section .compare-table {
  min-width: 780px;
}

.deepdoc-section .compare-table td {
  color: var(--color-text-muted);
  font-size: 14px;
}

.deepdoc-section .compare-table td:first-child {
  color: var(--color-text);
  font-weight: 720;
}

.protocol-table {
  min-width: 860px;
}

.topology-diagram {
  margin: 40px 0;
  border-top: 5px solid var(--color-border);
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
  background: var(--color-bg-panel);
}

.topology-row {
  min-width: 0;
  padding: 20px;
  display: grid;
  grid-template-columns: minmax(62px, 0.35fr) minmax(100px, 1fr) minmax(34px, 0.4fr) minmax(100px, 1fr) minmax(34px, 0.4fr) minmax(100px, 1fr);
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--color-border-soft);
}

.topology-row:last-child {
  border-bottom: 0;
}

.topology-label {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 750;
}

.topology-point {
  min-width: 0;
  padding: 10px;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  background: var(--color-bg-panel-2);
  font-size: 13px;
  text-align: center;
}

.topology-link {
  height: 2px;
  position: relative;
  background: var(--color-border);
}

.topology-link::after {
  content: "";
  width: 7px;
  height: 7px;
  position: absolute;
  top: 50%;
  right: 0;
  border-top: 2px solid var(--color-text-muted);
  border-right: 2px solid var(--color-text-muted);
  transform: translateY(-50%) rotate(45deg);
}

.topology-link.is-accent {
  background: var(--color-accent);
}

.diagnostic-flow {
  margin: 40px 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 5px solid var(--color-border);
  border-left: 1px solid var(--color-border);
}

.diagnostic-flow > div {
  min-width: 0;
  padding: 22px 18px;
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg-panel);
}

.diagnostic-flow > div:nth-child(even) {
  background: var(--color-bg-panel-2);
}

.diagnostic-flow span {
  display: block;
  margin-bottom: 10px;
  color: var(--color-text);
  font-weight: 760;
}

.diagnostic-flow p {
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: 13px;
}

.deepdoc-endnote {
  margin-top: 40px;
  padding: clamp(28px, 5vw, 48px);
  border-top: 6px solid var(--color-accent);
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
  background: var(--color-bg-panel-2);
  box-shadow: var(--shadow-panel);
}

.deepdoc-endnote h2 {
  max-width: 760px;
  margin-bottom: 14px;
  font-size: clamp(30px, 4vw, 46px);
}

.deepdoc-endnote > p:not(.promo-brand) {
  max-width: 760px;
  color: var(--color-text-muted);
}

.deepdoc-endnote .button-row {
  margin-top: 28px;
}

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

  .deepdoc-scope {
    max-width: 680px;
    margin-top: 0;
  }

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

  .deepdoc-rail {
    position: static;
    display: none;
  }

  .deepdoc-content {
    max-width: 100%;
  }

  .diagnostic-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  .deepdoc-hero {
    min-height: 0;
  }

  .deepdoc-hero-grid {
    min-height: 0;
    padding-top: 58px;
    padding-bottom: 100px;
  }

  .deepdoc-heading h1 {
    font-size: clamp(32px, 9vw, 40px);
  }

  .deepdoc-deck {
    font-size: 17px;
  }

  .deepdoc-route {
    opacity: 0.7;
  }

  .topology-diagram {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .topology-row {
    min-width: 720px;
  }
}

@media (max-width: 640px) {
  .deepdoc-hero-grid {
    padding-top: 46px;
    padding-bottom: 90px;
    gap: 30px;
  }

  .deepdoc-scope {
    padding: 21px 18px;
  }

  .deepdoc-scope dl div {
    grid-template-columns: minmax(0, 1fr);
    gap: 3px;
  }

  .deepdoc-nav-wrap {
    padding-top: 16px;
  }

  .deepdoc-layout {
    padding-top: 56px;
    padding-bottom: 76px;
  }

  .deepdoc-section {
    padding-top: 58px;
    padding-bottom: 58px;
  }

  .deepdoc-section > p {
    font-size: 15px;
    line-height: 1.9;
  }

  .deepdoc-section h3 {
    margin-top: 34px;
    padding-left: 14px;
  }

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

  .deepdoc-endnote {
    padding: 26px 18px;
  }
}