.faq-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(72px, 9vw, 124px);
  padding-bottom: clamp(52px, 7vw, 92px);
  border-bottom: 1px solid var(--color-line);
  background:
    linear-gradient(90deg, var(--color-panel), var(--color-transparent) 48%),
    var(--color-canvas);
  color: var(--color-text);
}

.faq-hero::before {
  position: absolute;
  top: 0;
  right: var(--gutter);
  width: min(42vw, 620px);
  height: 1px;
  background: linear-gradient(90deg, var(--color-transparent), var(--color-accent));
  content: '';
  opacity: 0.7;
}

.faq-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.72fr);
  gap: clamp(44px, 8vw, 112px);
  align-items: end;
}

.faq-hero-copy h1 {
  max-width: 760px;
}

.faq-hero-copy .lead {
  margin-bottom: 0;
}

.faq-route {
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.faq-route-head {
  display: flex;
  min-height: 44px;
  align-items: center;
  gap: 10px;
  border-bottom: 1px solid var(--color-line);
  color: var(--color-text-soft);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.faq-route ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.faq-route li {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  min-height: 58px;
  border-bottom: 1px solid var(--color-line);
}

.faq-route li:last-child {
  border-bottom: 0;
}

.faq-route li span {
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
}

.faq-route li strong {
  color: var(--color-text-soft);
  font-size: 13px;
  font-weight: 500;
}

.faq-toc {
  margin-top: clamp(48px, 7vw, 84px);
  margin-bottom: 0;
}

.faq-scope {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-right: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  border-left: 1px solid var(--color-line);
}

.faq-scope > div {
  min-width: 0;
  padding: 20px;
  border-right: 1px solid var(--color-line);
}

.faq-scope > div:last-child {
  border-right: 0;
}

.faq-scope-value,
.faq-scope-label {
  display: block;
}

.faq-scope-value {
  margin-bottom: 4px;
  color: var(--color-text);
  font-family: var(--font-mono);
  font-size: 15px;
}

.faq-scope-label {
  color: var(--color-text-soft);
  font-size: 12px;
}

.faq-category {
  scroll-margin-top: calc(var(--header-height) + 18px);
}

.faq-category-layout {
  display: grid;
  grid-template-columns: minmax(220px, 0.34fr) minmax(0, 1fr);
  gap: clamp(44px, 8vw, 112px);
  align-items: start;
}

.faq-category-head {
  position: sticky;
  top: calc(var(--header-height) + 28px);
}

.faq-category-index {
  margin-bottom: 18px;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
}

.faq-category-head h2 {
  margin-bottom: 18px;
}

.faq-category-head p:last-child {
  margin-bottom: 0;
}

.faq-category .faq-list {
  min-width: 0;
}

.faq-category .faq-item {
  transition: background-color var(--transition-fast);
}

.faq-category .faq-item[open] {
  background: linear-gradient(90deg, var(--color-panel), var(--color-canvas));
}

.faq-category .faq-item summary {
  padding-right: 18px;
  padding-left: 18px;
}

.faq-category .faq-answer {
  max-width: none;
  padding-right: clamp(24px, 5vw, 72px);
  padding-bottom: 30px;
  padding-left: 18px;
}

.faq-category .faq-answer p {
  margin-bottom: 0;
  line-height: 1.9;
}

.faq-next {
  text-align: left;
}

.faq-next .lead {
  margin-bottom: 30px;
}

@media (max-width: 900px) {
  .faq-hero-grid,
  .faq-category-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .faq-route {
    max-width: 680px;
  }

  .faq-category-head {
    position: static;
    max-width: 680px;
  }
}

@media (max-width: 640px) {
  .faq-hero {
    padding-top: 56px;
    padding-bottom: 48px;
  }

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

  .faq-scope > div {
    border-right: 0;
    border-bottom: 1px solid var(--color-line);
  }

  .faq-scope > div:last-child {
    border-bottom: 0;
  }

  .faq-category .faq-item summary {
    padding-right: 8px;
    padding-left: 8px;
  }

  .faq-category .faq-answer {
    padding-right: 8px;
    padding-left: 8px;
  }
}