.page-faq {
  --faq-card: var(--color-bg-panel);
  --faq-card-deep: var(--color-bg-card);
  --faq-line: var(--color-border);
  --faq-muted: var(--color-text-dim);
  --faq-accent: var(--color-accent);
  --faq-warn: var(--color-warn);
  background:
    radial-gradient(circle at 88% 6%, rgba(0, 230, 118, 0.1), transparent 280px),
    linear-gradient(180deg, var(--color-bg-deep), var(--color-bg) 36%);
  min-height: 100%;
}

.page-faq .faq-intro {
  padding-top: 12px;
}

.page-faq .faq-intro-rule {
  height: 4px;
  margin-bottom: 22px;
  background: linear-gradient(90deg, var(--faq-accent) 0%, var(--color-accent-soft) 46%, var(--faq-warn) 100%);
}

.page-faq .faq-intro .section-head {
  align-items: flex-start;
}

.page-faq .faq-intro .section-index {
  color: var(--faq-accent);
  font-family: var(--font-mono);
  font-weight: 700;
}

.page-faq .faq-layout {
  display: grid;
  gap: 28px;
  min-width: 0;
}

.page-faq .faq-content,
.page-faq .faq-accordion {
  min-width: 0;
}

.page-faq .faq-toc {
  background: var(--faq-card);
  border: 1px solid var(--faq-line);
  border-left: 4px solid var(--faq-accent);
  padding: 20px 18px;
  min-width: 0;
}

.page-faq .faq-toc h2 {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 900;
  letter-spacing: 0.08em;
  color: var(--color-text);
}

.page-faq .faq-toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  min-width: 0;
  display: grid;
  gap: 4px;
}

.page-faq .faq-toc-list a {
  display: block;
  padding: 8px 6px;
  color: var(--color-text);
  text-decoration: none;
  font-family: var(--font-mono);
  font-size: 14px;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-toc-list a:hover {
  color: var(--faq-accent);
  background: rgba(0, 230, 118, 0.06);
  border-bottom-color: var(--faq-accent);
}

.page-faq .faq-toc-list a:focus-visible {
  outline: 2px solid var(--faq-warn);
  outline-offset: 0;
}

.page-faq .faq-section {
  padding: 0 0 8px;
  min-width: 0;
}

.page-faq .faq-section + .faq-section {
  margin-top: 36px;
  padding-top: 32px;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-section .section-head {
  margin-bottom: 18px;
  align-items: flex-start;
}

.page-faq .faq-section .section-index {
  display: inline-block;
  background: var(--faq-card-deep);
  border: 1px solid var(--faq-line);
  border-left: 3px solid var(--faq-accent);
  padding: 2px 8px;
  color: var(--faq-accent);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 15px;
  line-height: 1.6;
}

.page-faq .faq-section .section-desc {
  color: var(--faq-muted);
  font-size: 14px;
  line-height: 1.6;
}

.page-faq .faq-accordion {
  display: grid;
  gap: 12px;
}

.page-faq .faq-item {
  position: relative;
  background: var(--faq-card);
  border: 1px solid var(--faq-line);
  border-left: 0;
  overflow: hidden;
  --item-angle: var(--faq-accent);
  transition: background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-faq .faq-item:nth-child(even) {
  --item-angle: var(--faq-warn);
}

.page-faq .faq-item::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 16px;
  height: 16px;
  background: linear-gradient(135deg, var(--item-angle) 0 50%, transparent 50%);
  pointer-events: none;
}

.page-faq .faq-item:hover {
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.28);
}

.page-faq .faq-item[open] {
  background: var(--faq-card-deep);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 15px 20px 15px 16px;
  cursor: pointer;
  list-style: none;
  background: linear-gradient(100deg, var(--faq-card-deep) 0%, transparent 72%);
  border-left: 3px solid var(--item-angle);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15px;
  line-height: 1.5;
  color: var(--color-text);
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

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

.page-faq .faq-item summary:hover {
  background: var(--faq-card-deep);
}

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--faq-warn);
  outline-offset: -2px;
}

.page-faq .faq-item summary::after {
  content: "+";
  flex: 0 0 auto;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 500;
  line-height: 1;
  color: var(--item-angle);
  align-self: center;
  transition: transform 0.2s ease, color 0.2s ease;
}

.page-faq .faq-item[open] summary::after {
  content: "−";
  transform: rotate(180deg);
  color: var(--faq-warn);
}

.page-faq .faq-q-num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--item-angle);
  background: rgba(0, 230, 118, 0.08);
  padding: 2px 6px;
}

.page-faq .faq-item:nth-child(even) .faq-q-num {
  background: rgba(255, 77, 0, 0.08);
}

.page-faq .faq-a {
  margin: 0;
  padding: 14px 20px 18px 34px;
  border-left: 3px solid var(--item-angle);
  color: var(--color-text);
  font-size: 15px;
  line-height: 1.7;
  background: var(--color-bg-deep);
  animation: page-faq-in 0.18s ease-out both;
}

.page-faq .faq-a p {
  margin: 0;
}

.page-faq .faq-a a {
  color: var(--faq-accent);
  text-decoration: none;
  border-bottom: 1px solid var(--faq-accent);
}

.page-faq .faq-a a:hover {
  color: var(--faq-warn);
  border-bottom-color: var(--faq-warn);
}

@keyframes page-faq-in {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-faq .faq-troubleshoot,
.page-faq .faq-dataflow {
  display: grid;
  gap: 20px;
  min-width: 0;
}

.page-faq .faq-figure {
  margin: 0;
  background: var(--faq-card);
  border: 1px solid var(--faq-line);
  padding: 8px;
  min-width: 0;
}

.page-faq .faq-figure img {
  width: 100%;
  height: auto;
  display: block;
}

.page-faq .faq-figure figcaption {
  padding: 8px 2px 2px;
  font-size: 12px;
  color: var(--faq-muted);
  font-family: var(--font-mono);
  line-height: 1.5;
}

.page-faq .faq-support-panel {
  margin-top: 24px;
  background: var(--faq-card);
  border: 1px solid var(--faq-line);
  border-top: 3px solid var(--faq-warn);
  padding: 22px;
  min-width: 0;
}

.page-faq .faq-support-panel h3 {
  margin: 0 0 6px;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 18px;
  color: var(--color-text);
}

.page-faq .faq-support-panel > p {
  margin: 0 0 20px;
  color: var(--faq-muted);
  font-size: 14px;
  line-height: 1.6;
}

.page-faq .faq-support-plate {
  display: grid;
  gap: 0;
  margin: 0 0 20px;
}

.page-faq .faq-support-plate div {
  display: grid;
  gap: 4px;
  padding-bottom: 12px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-support-plate div:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-support-plate dt {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--faq-muted);
  letter-spacing: 0.08em;
}

.page-faq .faq-support-plate dd {
  margin: 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.5;
}

@media (max-width: 919px) {
  .page-faq .faq-toc-list {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 8px;
  }

  .page-faq .faq-toc-list a {
    white-space: nowrap;
    background: var(--faq-card-deep);
    border: 1px solid var(--faq-line);
    padding: 8px 12px;
  }
}

@media (min-width: 760px) {
  .page-faq .faq-troubleshoot,
  .page-faq .faq-dataflow {
    grid-template-columns: 260px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-support-plate div {
    grid-template-columns: 120px minmax(0, 1fr);
    align-items: baseline;
    gap: 12px;
  }
}

@media (min-width: 920px) {
  .page-faq .faq-layout {
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 96px;
  }
}