:root {
  --nodes-hero-space: 84px;
  --nodes-board-width: 470px;
  --nodes-board-line: var(--color-accent-deep);
  --nodes-board-point: var(--color-accent);
  --nodes-section-tint: var(--color-panel);
  --nodes-step-size: 36px;
}

.nodes-hero {
  position: relative;
  overflow-x: clip;
  border-bottom: 1px solid var(--color-border-soft);
}

.nodes-hero-inner {
  display: grid;
  min-height: calc(100svh - var(--header-height));
  padding-top: var(--nodes-hero-space);
  padding-bottom: var(--nodes-hero-space);
  grid-template-columns: minmax(0, 1fr) minmax(360px, .88fr);
  align-items: center;
  gap: 64px;
}

.nodes-hero-copy,
.nodes-hero-visual {
  min-width: 0;
}

.nodes-hero-copy {
  position: relative;
  z-index: 2;
  max-width: 650px;
}

.nodes-title {
  margin-top: 22px;
  margin-bottom: 24px;
  font-size: clamp(52px, 5vw, 66px);
}

.nodes-lead {
  max-width: 620px;
  margin-bottom: 26px;
  color: var(--color-text-muted);
  font-size: 17px;
  line-height: 1.8;
}

.nodes-hero-visual {
  position: relative;
  display: flex;
  justify-content: flex-end;
}

.nodes-hero-glow {
  position: absolute;
  right: -170px;
  bottom: -190px;
  width: 700px;
  height: 590px;
  background: radial-gradient(closest-side, var(--color-accent-glow), var(--color-accent-haze) 47%, var(--color-transparent) 73%);
  pointer-events: none;
}

.nodes-route-board {
  position: relative;
  z-index: 1;
  width: min(100%, var(--nodes-board-width));
  overflow: clip;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  box-shadow: var(--shadow-card);
  transform: rotate(-1deg);
}

.nodes-board-bar {
  display: flex;
  min-height: 46px;
  padding: 11px 17px;
  border-bottom: 1px solid var(--color-border-soft);
  align-items: center;
  gap: 14px;
}

.nodes-board-dots {
  display: flex;
  flex-shrink: 0;
  gap: 7px;
}

.nodes-board-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-pill);
}

.nodes-board-dot-error {
  background: var(--color-error);
}

.nodes-board-dot-warning {
  background: var(--color-warning);
}

.nodes-board-dot-success {
  background: var(--color-success);
}

.nodes-board-title {
  overflow: hidden;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nodes-board-body {
  padding: 22px;
}

.nodes-board-head {
  display: flex;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--color-border-soft);
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.nodes-board-head > div {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 4px;
}

.nodes-board-head strong {
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: 18px;
}

.nodes-board-label {
  color: var(--color-text-muted);
  font-size: 12px;
}

.nodes-topology {
  display: grid;
  min-height: 154px;
  overflow: clip;
  place-items: center;
  border-bottom: 1px solid var(--color-border-soft);
  color: var(--nodes-board-line);
}

.nodes-topology svg {
  width: 100%;
  height: auto;
}

.nodes-topology-line {
  fill: none;
  stroke: currentColor;
  stroke-dasharray: 5 7;
  stroke-linecap: round;
  stroke-width: 1.5;
}

.nodes-topology-point {
  fill: var(--color-panel-raised);
  stroke: var(--nodes-board-point);
  stroke-width: 2;
}

.nodes-topology-point-main {
  fill: var(--color-accent);
  stroke: var(--color-accent-deep);
}

.nodes-region-grid {
  display: grid;
  padding-top: 16px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.nodes-region {
  display: flex;
  min-width: 0;
  padding: 13px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-panel-raised);
  flex-direction: column;
  gap: 3px;
}

.nodes-region span {
  color: var(--color-text-muted);
  font-size: 11px;
}

.nodes-region strong {
  overflow-wrap: anywhere;
  color: var(--color-text);
  font-size: 13px;
}

.nodes-board-foot {
  display: flex;
  margin-top: 16px;
  padding-top: 15px;
  border-top: 1px solid var(--color-border-soft);
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  color: var(--color-text-muted);
  font-size: 11px;
}

.nodes-board-state {
  display: inline-flex;
  flex-shrink: 0;
  align-items: center;
  gap: 7px;
  color: var(--color-text);
}

.nodes-board-state .status-dot {
  width: 7px;
  height: 7px;
}

.nodes-content {
  min-width: 0;
}

.nodes-content > .toc-tabs {
  top: 12px;
  margin-top: 28px;
  margin-bottom: 0;
}

.nodes-table-caption {
  padding: 14px 18px;
  border-bottom: 1px solid var(--color-border-soft);
  background: var(--color-panel);
  color: var(--color-text-muted);
  font-size: 13px;
  text-align: left;
}

.nodes-type-tag {
  display: inline-flex;
  max-width: 100%;
  min-height: 26px;
  padding: 4px 9px;
  overflow: hidden;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xs);
  background: var(--color-panel-raised);
  color: var(--color-text-muted);
  font-size: 12px;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nodes-type-premium {
  border-color: var(--color-accent-deep);
  color: var(--color-accent);
}

.nodes-type-direct {
  color: var(--color-success);
}

.nodes-section-raised {
  border-top: 1px solid var(--color-border-soft);
  border-bottom: 1px solid var(--color-border-soft);
  background: var(--nodes-section-tint);
}

.nodes-type-layout {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.nodes-type-card {
  min-width: 0;
  padding: 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel-raised);
  box-shadow: var(--shadow-soft);
}

.nodes-type-head {
  display: flex;
  margin-bottom: 20px;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.nodes-type-index {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: .1em;
}

.nodes-type-card h3 {
  font-size: 25px;
}

.nodes-type-card p,
.nodes-cost-note p {
  color: var(--color-text-muted);
}

.nodes-type-card p:last-child,
.nodes-cost-note p:last-child {
  margin-bottom: 0;
}

.nodes-cost-note {
  margin-top: 20px;
  padding: 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(440px 180px at 100% 100%, var(--color-accent-haze), var(--color-transparent) 72%),
    var(--color-panel-raised);
}

.nodes-use-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.nodes-use-card {
  min-width: 0;
  padding: 28px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  box-shadow: var(--shadow-soft);
}

.nodes-use-card:last-child {
  grid-column: 1 / -1;
}

.nodes-use-label {
  display: inline-flex;
  min-height: 27px;
  margin-bottom: 16px;
  padding: 5px 10px;
  align-items: center;
  border: 1px solid var(--color-accent-deep);
  border-radius: var(--radius-sm);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .06em;
}

.nodes-use-card h3 {
  font-size: 23px;
}

.nodes-use-card p {
  color: var(--color-text-muted);
}

.nodes-use-card p:last-child {
  margin-bottom: 0;
}

.nodes-reading-layout {
  display: grid;
  grid-template-columns: minmax(240px, .62fr) minmax(0, 1.38fr);
  align-items: start;
  gap: 56px;
}

.nodes-steps {
  margin: 0;
  padding: 0;
  counter-reset: route-step;
  list-style: none;
}

.nodes-steps li {
  position: relative;
  min-width: 0;
  padding: 0 0 30px 58px;
  border-left: 1px solid var(--color-border);
  counter-increment: route-step;
}

.nodes-steps li:last-child {
  padding-bottom: 0;
  border-left-color: var(--color-transparent);
}

.nodes-steps li::before {
  position: absolute;
  top: 0;
  left: calc(var(--nodes-step-size) / -2);
  display: grid;
  width: var(--nodes-step-size);
  height: var(--nodes-step-size);
  border: 1px solid var(--color-accent-deep);
  border-radius: var(--radius-pill);
  background: var(--color-panel-raised);
  color: var(--color-accent);
  content: counter(route-step);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 750;
  place-items: center;
}

.nodes-steps h3 {
  margin-bottom: 9px;
  font-size: 21px;
}

.nodes-steps p {
  margin-bottom: 0;
  color: var(--color-text-muted);
}

.nodes-principle-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.nodes-principle {
  min-width: 0;
  padding: 24px;
  border-top: 3px solid var(--color-accent-deep);
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-panel);
}

.nodes-principle h3 {
  font-size: 20px;
}

.nodes-principle p {
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: 14.5px;
}

.nodes-summary {
  display: grid;
  margin-top: 42px;
  padding: 30px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(460px 210px at 100% 100%, var(--color-accent-haze), var(--color-transparent) 72%),
    var(--color-panel-raised);
  box-shadow: var(--shadow-soft);
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 30px;
}

.nodes-summary-label {
  display: block;
  margin-bottom: 8px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 750;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.nodes-summary h2 {
  margin-bottom: 10px;
  font-size: 29px;
}

.nodes-summary p {
  max-width: 760px;
  margin-bottom: 0;
  color: var(--color-text-muted);
}

@media (max-width: 1040px) {
  .nodes-hero-inner {
    grid-template-columns: minmax(0, 1fr) minmax(340px, .82fr);
    gap: 36px;
  }

  .nodes-type-layout,
  .nodes-principle-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 900px) {
  .nodes-hero-inner {
    min-height: auto;
    grid-template-columns: 1fr;
  }

  .nodes-hero-copy {
    max-width: 720px;
  }

  .nodes-hero-visual {
    justify-content: center;
  }

  .nodes-route-board {
    width: min(100%, var(--nodes-board-width));
  }

  .nodes-reading-layout {
    grid-template-columns: 1fr;
    gap: 34px;
  }
}

@media (max-width: 768px) {
  :root {
    --nodes-hero-space: 58px;
  }

  .nodes-title {
    font-size: clamp(34px, 10vw, 40px);
  }

  .nodes-lead {
    font-size: 16px;
  }

  .nodes-use-grid {
    grid-template-columns: 1fr;
  }

  .nodes-use-card:last-child {
    grid-column: auto;
  }

  .nodes-summary {
    grid-template-columns: 1fr;
  }

  .nodes-summary .btn-secondary {
    width: 100%;
  }
}

@media (max-width: 640px) {
  .nodes-hero-inner {
    gap: 44px;
  }

  .nodes-route-board {
    transform: none;
  }

  .nodes-board-body {
    padding: 17px;
  }

  .nodes-board-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .nodes-topology {
    min-height: 132px;
  }

  .nodes-region-grid {
    grid-template-columns: 1fr;
  }

  .nodes-board-foot {
    align-items: flex-start;
    flex-direction: column;
  }

  .nodes-type-card,
  .nodes-use-card,
  .nodes-cost-note,
  .nodes-summary {
    padding: 22px;
  }

  .nodes-steps li {
    padding-left: 48px;
  }
}

@media (max-width: 380px) {
  .nodes-board-title {
    font-size: 10px;
  }

  .nodes-type-head {
    align-items: flex-start;
    flex-direction: column;
  }
}