.page-faq {
  --faq-panel: rgba(20, 30, 60, 0.62);
  --faq-open: rgba(0, 229, 255, 0.05);
  --faq-anchor-offset: 104px;
  padding-block: clamp(24px, 3.5vw, 48px) clamp(64px, 9vw, 120px);
  color: var(--text);
  font-family: var(--font-body);
}

/* ---------- 首屏 ---------- */
.page-faq .breadcrumb {
  margin-bottom: clamp(20px, 2.6vw, 34px);
}

.page-faq .faq-hero {
  max-width: 940px;
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(2.2rem, 5.6vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 64ch;
  font-size: clamp(1rem, 1.5vw, 1.0625rem);
  line-height: 1.9;
  color: var(--text-dim);
}

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-stats li {
  background: var(--c-ink-2);
  padding: 16px 18px 18px;
}

.page-faq .faq-stats__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.4vw, 2.1rem);
  line-height: 1.1;
  color: var(--c-cyan);
}

.page-faq .faq-stats li:nth-child(4) .faq-stats__num {
  color: var(--c-orange);
}

.page-faq .faq-stats__label {
  display: block;
  margin-top: 6px;
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
  color: var(--text-mute);
}

/* ---------- 布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 48px);
  margin-top: clamp(40px, 6vw, 76px);
}

/* ---------- 侧边索引 ---------- */
.page-faq .faq-index {
  border: 1px solid var(--line);
  background: var(--faq-panel);
  padding: 18px 18px 20px;
}

.page-faq .faq-index__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-amber);
}

.page-faq .faq-index__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 12px 11px 14px;
  border-left: 2px solid transparent;
  color: var(--text-dim);
  font-size: 0.9375rem;
  line-height: 1.5;
  text-decoration: none;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-mute);
  transition: color 0.18s ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--c-cyan);
  border-left-color: var(--c-cyan);
  background: rgba(0, 229, 255, 0.07);
  outline: none;
}

.page-faq .faq-index__link:hover .faq-index__no,
.page-faq .faq-index__link:focus-visible .faq-index__no {
  color: var(--c-orange);
}

.page-faq .faq-index__foot {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--text-mute);
}

.page-faq .faq-index__foot a {
  color: var(--c-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 章节 ---------- */
.page-faq .faq-section {
  scroll-margin-top: var(--faq-anchor-offset);
}

.page-faq .faq-section + .faq-section {
  margin-top: clamp(48px, 6vw, 84px);
}

.page-faq .faq-section__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--line-strong);
}

.page-faq .faq-section__no {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  color: var(--c-orange);
}

.page-faq .faq-section__head h2 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.2vw, 2.1rem);
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--text);
}

/* ---------- 折叠面板 ---------- */
.page-faq .faq-list {
  margin: 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-item {
  border-top: 1px solid var(--line);
  transition: background-color 0.2s ease;
}

.page-faq .faq-item:first-child {
  border-top: 0;
}

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

.page-faq .faq-item__q {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 18px 44px 18px 14px;
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  font-size: clamp(1rem, 1.6vw, 1.0625rem);
  line-height: 1.65;
  color: var(--text);
  transition: color 0.18s ease;
}

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

.page-faq .faq-item__q::after {
  content: "+";
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: 1.25rem;
  line-height: 1;
  color: var(--text-mute);
  transition: color 0.18s ease, transform 0.18s ease;
}

.page-faq .faq-item[open] .faq-item__q::after {
  content: "\2212";
  color: var(--c-cyan);
}

.page-faq .faq-item__q:hover {
  color: var(--c-cyan);
}

.page-faq .faq-item__q:hover::after {
  color: var(--c-cyan);
  transform: translateY(-50%) translateX(3px);
}

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: -2px;
}

.page-faq .faq-item__idx {
  flex: 0 0 auto;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--c-amber);
}

.page-faq .faq-item[open] .faq-item__idx {
  color: var(--c-cyan);
}

.page-faq .faq-item__a {
  padding: 0 24px 22px 14px;
  color: var(--text-dim);
  font-size: 0.9375rem;
  line-height: 1.9;
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 68ch;
}

.page-faq .faq-item__a a {
  color: var(--c-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-item__a a:hover {
  color: var(--c-orange);
}

/* ---------- 图片 ---------- */
.page-faq .faq-figure {
  margin: clamp(24px, 3vw, 34px) 0 0;
  border: 1px solid var(--line);
  background: var(--c-ink-2);
}

.page-faq .faq-figure .figure__media {
  overflow: hidden;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.05);
}

.page-faq .faq-figure .figure__caption {
  margin: 0;
  padding: 12px 16px 14px;
  border-top: 1px solid var(--line);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--text-mute);
}

/* ---------- 结尾引导 ---------- */
.page-faq .faq-cta {
  margin-top: clamp(52px, 7vw, 92px);
  display: grid;
  gap: 22px;
  padding: clamp(24px, 4vw, 44px);
  border: 1px solid var(--line-cyan);
  background:
    linear-gradient(135deg, rgba(0, 229, 255, 0.1) 0%, rgba(10, 17, 40, 0) 46%),
    var(--c-ink-2);
}

.page-faq .faq-cta__text h2 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  line-height: 1.25;
  color: var(--text);
}

.page-faq .faq-cta__text p {
  margin: 12px 0 0;
  max-width: 58ch;
  font-size: 0.9375rem;
  line-height: 1.9;
  color: var(--text-dim);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-stats li {
    padding: 20px 20px 22px;
  }

  .page-faq .faq-item__q {
    padding: 20px 52px 20px 18px;
  }

  .page-faq .faq-item__a {
    padding: 0 52px 24px 18px;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-layout {
    grid-template-columns: 244px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 92px;
    border-color: var(--line-strong);
  }

  .page-faq .faq-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }

  .page-faq .faq-cta__actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-hero__lead {
    font-size: 1.125rem;
  }

  .page-faq .faq-item__a {
    font-size: 1rem;
  }
}