.doc-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--color-line);
  background: linear-gradient(180deg, var(--color-canvas), var(--color-panel));
  padding-top: clamp(72px, 9vw, 118px);
  padding-bottom: clamp(66px, 8vw, 104px);
}

.doc-hero::before {
  position: absolute;
  top: 48px;
  left: 50%;
  width: min(880px, 86vw);
  height: 390px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-xl);
  content: "";
  opacity: 0.58;
  pointer-events: none;
  transform: translateX(-50%) rotate(-3deg);
}

.doc-hero-orbit {
  position: absolute;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-xl);
  pointer-events: none;
}

.doc-hero-orbit-left {
  top: 120px;
  left: -230px;
  width: 470px;
  height: 260px;
  transform: rotate(12deg);
}

.doc-hero-orbit-right {
  right: -260px;
  bottom: 42px;
  width: 520px;
  height: 290px;
  transform: rotate(-10deg);
}

.doc-hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
}

.doc-hero h1 {
  margin-bottom: 22px;
}

.doc-hero .lead {
  margin-bottom: 26px;
}

.doc-hero-facts {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 26px;
}

.doc-route-note {
  max-width: 720px;
  margin-inline: auto;
  color: var(--color-muted);
  font-size: 14px;
}

.doc-route-note a {
  color: var(--color-primary);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.doc-article {
  padding-top: 28px;
  padding-bottom: var(--section-space);
}

.doc-article .toc-tabs {
  margin-bottom: clamp(64px, 8vw, 104px);
}

.doc-section {
  position: relative;
  padding-top: 18px;
  padding-bottom: clamp(74px, 9vw, 116px);
  border-bottom: 1px solid var(--color-line);
}

.doc-section + .doc-section {
  padding-top: clamp(72px, 9vw, 112px);
}

.doc-section-mark {
  display: inline-flex;
  margin-bottom: 16px;
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.11em;
}

.doc-section h2 {
  max-width: 720px;
}

.doc-section h3 {
  margin-top: 42px;
  font-size: clamp(21px, 2.6vw, 27px);
}

.doc-section p,
.doc-section li {
  font-size: 17px;
  line-height: 1.85;
}

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

.doc-section .table-scroll {
  margin-top: 32px;
  margin-bottom: 34px;
}

.doc-section pre {
  margin-top: 24px;
  margin-bottom: 26px;
}

.doc-section pre code {
  color: var(--color-ink);
}

.ip-compare-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 32px;
  margin-bottom: 34px;
}

.ip-compare-item {
  min-width: 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-panel);
  padding: 22px;
}

.ip-compare-item strong {
  display: block;
  margin-bottom: 8px;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: 18px;
}

.ip-compare-item p {
  font-size: 14px;
  line-height: 1.7;
}

.route-decision {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 34px;
  margin-bottom: 36px;
}

.route-decision > div {
  min-width: 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background: var(--color-canvas);
  padding: 22px;
  box-shadow: var(--shadow-card);
}

.route-decision strong {
  display: block;
  margin-top: 14px;
  margin-bottom: 8px;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: 18px;
}

.route-decision p {
  font-size: 14px;
  line-height: 1.7;
}

.doc-related {
  padding-top: clamp(72px, 9vw, 112px);
}

.doc-related h2 {
  max-width: 680px;
}

.doc-related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 34px;
}

.doc-related-grid a {
  display: flex;
  min-width: 0;
  min-height: 172px;
  flex-direction: column;
  gap: 10px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-canvas);
  padding: 24px;
  color: var(--color-ink);
  text-decoration: none;
  box-shadow: var(--shadow-card);
  transition: transform 180ms var(--ease-standard), border-color 180ms ease, box-shadow 180ms ease;
}

.doc-related-grid a:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-window);
  transform: translateY(-3px);
}

.doc-related-grid strong {
  font-family: var(--font-display);
  font-size: 20px;
}

.doc-related-grid span {
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.7;
}

@media (max-width: 760px) {
  .doc-hero::before {
    top: 76px;
    height: 340px;
  }

  .doc-hero-orbit {
    display: none;
  }

  .doc-article {
    padding-top: 18px;
  }

  .doc-article .toc-tabs {
    margin-bottom: 64px;
  }

  .doc-section p,
  .doc-section li {
    font-size: 16px;
    line-height: 1.82;
  }

  .ip-compare-grid,
  .route-decision,
  .doc-related-grid {
    grid-template-columns: 1fr;
  }

  .doc-related-grid a {
    min-height: 0;
  }
}

@media (max-width: 480px) {
  .doc-hero {
    padding-top: 58px;
    padding-bottom: 62px;
  }

  .doc-hero-facts {
    align-items: stretch;
    flex-direction: column;
  }

  .doc-hero-facts .fact-chip {
    justify-content: center;
  }

  .doc-section h3 {
    margin-top: 34px;
  }

  .ip-compare-item,
  .route-decision > div,
  .doc-related-grid a {
    padding: 20px;
  }
}