.deepdoc {
  position: relative;
}

.deepdoc-hero {
  position: relative;
  padding-top: clamp(62px, 8vw, 110px);
  padding-bottom: clamp(54px, 7vw, 92px);
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
  background:
    radial-gradient(circle at 76% 24%, var(--color-glow), var(--color-transparent) 28%),
    linear-gradient(180deg, var(--color-bg-deep), var(--color-bg));
}

.deepdoc-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--color-grid-strong) 1px, var(--color-transparent) 1px),
    linear-gradient(90deg, var(--color-grid-strong) 1px, var(--color-transparent) 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, var(--color-bg-deep), var(--color-transparent));
}

.deepdoc-hero .wrap {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  align-items: center;
  gap: clamp(42px, 7vw, 92px);
}

.deepdoc-hero-copy {
  max-width: 710px;
}

.deepdoc-hero h1 {
  margin: 18px 0 20px;
  font-size: clamp(52px, 5.3vw, 72px);
}

.deepdoc-lead {
  max-width: 680px;
  margin-bottom: 0;
  color: var(--color-text-muted);
  font-size: clamp(17px, 1.8vw, 21px);
  line-height: 1.8;
}

.deepdoc-actions {
  margin-top: 28px;
}

.deepdoc-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

.deepdoc-facts span {
  min-height: 30px;
  display: inline-flex;
  align-items: center;
  padding-inline: 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  color: var(--color-text-muted);
  background: var(--color-highlight);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.deepdoc-map {
  position: relative;
  min-height: 300px;
  display: grid;
  place-items: center;
  overflow: hidden;
  border: 1px solid var(--color-border-bright);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(var(--color-grid) 1px, var(--color-transparent) 1px),
    linear-gradient(90deg, var(--color-grid) 1px, var(--color-transparent) 1px),
    var(--color-panel);
  background-size: 30px 30px;
  box-shadow: var(--shadow-panel), var(--shadow-inset);
}

.deepdoc-map::before {
  content: "";
  position: absolute;
  top: -90px;
  left: -40px;
  width: 320px;
  height: 230px;
  border-radius: var(--radius-pill);
  background: radial-gradient(circle, var(--color-glow), var(--color-transparent) 68%);
}

.deepdoc-map svg {
  position: relative;
  z-index: 1;
  width: 100%;
}

.doc-axon {
  fill: none;
  stroke: var(--color-accent-dark);
  stroke-width: 1.4;
  stroke-dasharray: 5 8;
}

.doc-axon-soft {
  stroke: var(--color-border-bright);
  opacity: 0.68;
}

.doc-axon-fine {
  stroke: var(--color-border);
  stroke-width: 1;
}

.doc-node {
  fill: var(--color-panel-raised);
  stroke: var(--color-accent);
  stroke-width: 1.3;
}

.doc-node-active {
  filter: drop-shadow(0 0 12px var(--color-accent));
}

.doc-node-core {
  fill: var(--color-accent);
}

.doc-map-label {
  fill: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.12em;
}

.deepdoc-layout {
  padding-top: clamp(34px, 5vw, 64px);
  padding-bottom: var(--section-space);
}

.deepdoc-layout .toc-tabs {
  margin-bottom: clamp(52px, 7vw, 84px);
}

.deepdoc-intro {
  max-width: 980px;
  display: grid;
  grid-template-columns: minmax(150px, 0.28fr) minmax(0, 1fr);
  gap: clamp(24px, 5vw, 70px);
  margin: 0 auto clamp(78px, 10vw, 132px);
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid var(--color-border-bright);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(145deg, var(--color-highlight), var(--color-transparent)),
    var(--color-panel);
  box-shadow: var(--shadow-card);
}

.deepdoc-intro-mark {
  color: var(--color-accent);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
}

.deepdoc-intro p {
  font-size: 1.02rem;
}

.deepdoc-intro p:last-child {
  margin-bottom: 0;
}

.deepdoc-intro a,
.deepdoc-section a {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: var(--color-accent-dark);
  text-underline-offset: 0.2em;
}

.deepdoc-section {
  position: relative;
  width: 100%;
  max-width: 920px;
  margin-inline: auto;
  padding-top: clamp(56px, 8vw, 96px);
  padding-bottom: clamp(56px, 8vw, 96px);
  border-top: 1px solid var(--color-border);
}

.deepdoc-section:first-of-type {
  border-top-color: var(--color-border-bright);
}

.chapter-index {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--color-accent);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
}

.deepdoc-section h2 {
  max-width: 760px;
  margin-bottom: 40px;
}

.deepdoc-section h3 {
  margin-top: 48px;
  margin-bottom: 14px;
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: clamp(21px, 2.4vw, 28px);
}

.deepdoc-section p,
.deepdoc-section li {
  font-size: 1.02rem;
  line-height: 1.95;
}

.deepdoc-section p {
  margin-bottom: 20px;
}

.deepdoc-section .data-table {
  max-width: 100%;
  margin-block: 36px;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-panel);
  -webkit-overflow-scrolling: touch;
}

.deepdoc-section .data-table table {
  min-width: 700px;
  margin-bottom: 0;
}

.deepdoc-section pre {
  margin-block: 36px;
}

.deepdoc-check {
  margin-top: 46px;
  padding: clamp(22px, 4vw, 36px);
  border: 1px solid var(--color-border-bright);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 0 0, var(--color-glow-soft), var(--color-transparent) 38%),
    var(--color-panel);
}

.deepdoc-check h3 {
  margin-top: 0;
}

.deepdoc-check .check-list {
  margin-bottom: 0;
}

.deepdoc-check .check-list li {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
}

.deepdoc-check .check-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.deepdoc-next {
  max-width: 1040px;
  margin: clamp(64px, 9vw, 112px) auto 0;
  padding: clamp(28px, 5vw, 48px);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  overflow: hidden;
  border: 1px solid var(--color-border-bright);
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at 12% 0, var(--color-glow), var(--color-transparent) 42%),
    var(--color-panel-raised);
  box-shadow: var(--shadow-panel);
}

.deepdoc-next > div:first-child {
  max-width: 670px;
}

.deepdoc-next h2 {
  margin: 10px 0 12px;
  font-size: clamp(32px, 4vw, 48px);
}

.deepdoc-next p {
  margin-bottom: 0;
}

.deepdoc-next .button-row {
  flex: 0 0 auto;
}

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

  .deepdoc-map {
    min-height: 250px;
  }

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

@media (max-width: 768px) {
  .deepdoc-hero {
    padding-top: 44px;
  }

  .deepdoc-hero h1 {
    font-size: clamp(28px, 9.5vw, 40px);
  }

  .deepdoc-map {
    min-height: 210px;
    border-radius: var(--radius-lg);
  }

  .deepdoc-intro {
    grid-template-columns: 1fr;
  }

  .deepdoc-section h2 {
    margin-bottom: 30px;
  }

  .deepdoc-section h3 {
    margin-top: 38px;
  }
}

@media (max-width: 640px) {
  .deepdoc-map {
    min-height: 180px;
  }

  .doc-map-label {
    display: none;
  }

  .deepdoc-facts {
    gap: 6px;
  }

  .deepdoc-facts span {
    font-size: 0.66rem;
  }

  .deepdoc-intro {
    padding: 22px;
  }

  .deepdoc-section p,
  .deepdoc-section li {
    font-size: 1rem;
    line-height: 1.9;
  }

  .deepdoc-next .button-row {
    width: 100%;
  }
}