.page-faq {
  --faq-node: var(--color-accent);
  --faq-line: var(--color-border);
  --faq-tree-width: 240px;
}

.page-faq .breadcrumbs {
  padding-top: 24px;
}

.page-faq .faq-hero {
  display: grid;
  gap: 28px;
  padding: 40px 0 36px;
  position: relative;
}

.page-faq .faq-hero::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: repeating-linear-gradient(90deg,
    var(--color-accent) 0 32px,
    transparent 32px 64px,
    var(--color-signal) 64px 72px,
    transparent 72px 104px);
  opacity: 0.85;
}

.page-faq .faq-hero__context .data-label {
  color: var(--color-accent);
}

.page-faq .faq-hero__title {
  font-family: var(--font-display);
  font-size: clamp(28px, 6vw, 44px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 12px 0 16px;
  max-width: 720px;
  color: var(--color-text);
}

.page-faq .faq-hero__lead {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-muted);
  max-width: 640px;
}

.page-faq .faq-hero__search {
  background: rgba(4, 12, 20, 0.45);
  border: 1px solid var(--color-border);
  padding: 20px;
  align-self: end;
}

.page-faq .faq-hero__search-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-bottom: 10px;
}

.page-faq .faq-hero__search-input {
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
  border-radius: 0;
  background: var(--color-bg-deep);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  padding: 12px 14px;
  font-family: var(--font-body);
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s;
}

.page-faq .faq-hero__search-input::placeholder {
  color: rgba(160, 182, 200, 0.6);
}

.page-faq .faq-hero__search-input:focus {
  border-color: var(--color-accent);
}

.page-faq .faq-hero__search-hint {
  margin: 8px 0 0;
  font-size: 12px;
  line-height: 1.6;
  color: var(--color-muted);
}

.page-faq .faq-tree {
  display: grid;
  gap: 40px;
  padding: 40px 0 24px;
}

.page-faq .faq-tree__index {
  background: rgba(44, 76, 110, 0.15);
  border: 1px solid var(--color-border-soft);
  padding: 16px;
}

.page-faq .faq-tree__index .data-label {
  font-size: 12px;
  color: var(--color-accent);
}

.page-faq .faq-tree__index-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0 0 2px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-tree__index-item {
  flex-shrink: 0;
}

.page-faq .faq-tree__index-link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--color-border-soft);
  color: var(--color-muted);
  text-decoration: none;
  font-size: 13px;
  white-space: nowrap;
  transition: color 0.2s, border-color 0.2s, padding-left 0.2s;
}

.page-faq .faq-tree__index-link span {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-accent);
}

.page-faq .faq-tree__index-link:hover,
.page-faq .faq-tree__index-link:focus {
  color: var(--color-text);
  border-color: var(--color-border);
}

.page-faq .faq-tree__branches {
  display: grid;
  gap: 56px;
}

.page-faq .faq-branch {
  position: relative;
  padding-left: 28px;
}

.page-faq .faq-branch::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 13px;
  bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(to bottom, var(--faq-node) 0 28px, var(--faq-line) 28px);
}

.page-faq .faq-branch__header {
  position: relative;
}

.page-faq .faq-branch__header::before {
  content: '';
  position: absolute;
  left: -28px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 4px rgba(245, 230, 66, 0.14);
}

.page-faq .faq-branch__header .data-label {
  font-size: 12px;
  color: var(--color-muted);
}

.page-faq .faq-branch__count {
  color: var(--color-signal);
  margin-left: 8px;
}

.page-faq .faq-branch__header h2 {
  margin: 8px 0 6px;
  font-family: var(--font-display);
  font-size: 26px;
  line-height: 1.15;
  color: var(--color-text);
}

.page-faq .faq-branch__header-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-muted);
  max-width: 520px;
}

.page-faq .faq-branch__items {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.page-faq .faq-branch__item {
  position: relative;
  background: rgba(245, 236, 217, 0.03);
  border: 1px solid var(--color-border-soft);
  transition: border-color 0.25s, background 0.25s;
}

.page-faq .faq-branch__item:hover {
  border-color: var(--color-border);
}

.page-faq .faq-branch__item[open] {
  border-color: rgba(245, 230, 66, 0.4);
  background: rgba(245, 236, 217, 0.05);
}

.page-faq .faq-branch__item::before {
  content: '';
  position: absolute;
  left: -28px;
  top: 28px;
  width: 27px;
  height: 1px;
  background: var(--faq-line);
}

.page-faq .faq-branch__item::after {
  content: '';
  position: absolute;
  left: -25px;
  top: 25px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-signal);
  box-shadow: 0 0 8px rgba(61, 255, 86, 0.45);
  transition: background 0.25s, box-shadow 0.25s;
}

.page-faq .faq-branch__item[open]::after {
  background: var(--color-accent);
  box-shadow: 0 0 8px rgba(245, 230, 66, 0.5);
}

.page-faq .faq-branch__item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 52px 16px 16px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--color-text);
  position: relative;
}

.page-faq .faq-branch__item summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-branch__item summary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: -2px;
}

.page-faq .faq-branch__qid {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.8;
  color: var(--color-accent);
}

.page-faq .faq-branch__qtext {
  flex: 1;
}

.page-faq .faq-branch__item summary::after {
  content: '+';
  position: absolute;
  right: 16px;
  top: 13px;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1.2;
  color: var(--color-accent);
  transition: transform 0.25s var(--ease-out);
}

.page-faq .faq-branch__item[open] summary::after {
  content: '−';
}

.page-faq .faq-branch__answer {
  padding: 0 20px 20px 32px;
  margin-left: 32px;
  border-left: 2px solid var(--faq-line);
  display: grid;
  gap: 12px;
}

.page-faq .faq-branch__item[open] .faq-branch__answer {
  animation: page-faq-answer-in 0.3s var(--ease-out);
}

@keyframes page-faq-answer-in {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-faq .faq-branch__answer p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-muted);
}

.page-faq .faq-branch__figure {
  margin: 8px 0 0;
}

.page-faq .faq-branch__figure img {
  display: block;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--color-border-soft);
}

.page-faq .faq-branch__figure figcaption {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.5;
  color: var(--color-muted);
  margin-top: 8px;
}

.page-faq .faq-support {
  padding: 48px 0 56px;
}

.page-faq .faq-support__inner {
  background: var(--color-paper);
  color: var(--color-ink);
  padding: 32px 24px;
  position: relative;
  overflow: hidden;
}

.page-faq .faq-support__inner::before {
  content: '?';
  position: absolute;
  right: 12px;
  top: -24px;
  font-family: var(--font-display);
  font-size: 150px;
  font-weight: 700;
  line-height: 1;
  color: var(--color-ink-soft);
  pointer-events: none;
}

.page-faq .faq-support__inner .data-label {
  color: rgba(4, 12, 20, 0.55);
}

.page-faq .faq-support__inner h2 {
  margin: 10px 0 12px;
  font-family: var(--font-display);
  font-size: 28px;
  line-height: 1.2;
}

.page-faq .faq-support__inner > p:not(.faq-support__mail) {
  margin: 0 0 24px;
  font-size: 14px;
  line-height: 1.8;
  max-width: 520px;
}

.page-faq .faq-support__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
  position: relative;
}

.page-faq .faq-support__actions .btn {
  padding: 10px 18px;
  font-size: 14px;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.page-faq .faq-support__actions .btn--primary {
  background: var(--color-accent);
  color: var(--color-ink);
  border: 1px solid var(--color-accent);
  font-weight: 700;
}

.page-faq .faq-support__actions .btn--ghost {
  background: transparent;
  border: 1px solid rgba(4, 12, 20, 0.35);
  color: var(--color-ink);
  font-weight: 600;
}

.page-faq .faq-support__actions .btn--ghost:hover,
.page-faq .faq-support__actions .btn--ghost:focus {
  border-color: var(--color-ink);
}

.page-faq .faq-support__mail {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  opacity: 0.75;
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.85fr);
    align-items: center;
    gap: 48px;
    padding: 72px 0 56px;
  }

  .page-faq .faq-hero__title {
    font-size: 48px;
  }

  .page-faq .faq-tree {
    grid-template-columns: var(--faq-tree-width) minmax(0, 1fr);
    gap: 56px;
    padding: 56px 0 32px;
  }

  .page-faq .faq-tree__index {
    position: sticky;
    top: 24px;
    align-self: start;
    padding: 20px;
  }

  .page-faq .faq-tree__index-list {
    display: grid;
    gap: 0;
    overflow: visible;
    margin-top: 14px;
  }

  .page-faq .faq-tree__index-item + .faq-tree__index-item {
    border-top: 1px solid var(--color-border-soft);
  }

  .page-faq .faq-tree__index-link {
    border: none;
    padding: 12px 4px;
    font-size: 14px;
    white-space: normal;
  }

  .page-faq .faq-tree__index-link:hover,
  .page-faq .faq-tree__index-link:focus {
    border: none;
    padding-left: 10px;
  }

  .page-faq .faq-branch {
    padding-left: 36px;
  }

  .page-faq .faq-branch__header::before {
    left: -36px;
  }

  .page-faq .faq-branch__item::before {
    left: -36px;
    width: 35px;
  }

  .page-faq .faq-branch__item::after {
    left: -33px;
  }

  .page-faq .faq-branch__header h2 {
    font-size: 32px;
  }

  .page-faq .faq-branch__header-desc {
    font-size: 15px;
  }

  .page-faq .faq-support {
    padding: 56px 0 72px;
  }

  .page-faq .faq-support__inner {
    padding: 44px 52px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-branch__item[open] .faq-branch__answer {
    animation: none;
  }

  .page-faq .faq-branch__item summary::after,
  .page-faq .faq-branch__item[open] summary::after {
    transition: none;
  }
}