.page-faq {
  --faq-toc-w: 236px;
  --faq-paper-mark: #a8491f;
  padding-bottom: 72px;
}

.page-faq .breadcrumb {
  margin-top: 22px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 32px 0 40px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  width: min(260px, 45%);
  height: 1px;
  background: linear-gradient(90deg, rgba(43, 233, 224, 0), var(--cyan));
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  font-size: clamp(32px, 8.6vw, 68px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-faq .faq-hero .lede {
  margin: 18px 0 0;
  max-width: 58ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-faq .faq-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-stat {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  font-size: 13.5px;
  color: var(--muted);
}

.page-faq .faq-stat .num {
  font-family: var(--mono);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--cyan);
}

/* ---------- 布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  margin-top: 36px;
}

.page-faq .faq-toc {
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-toc-title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-faq .faq-toc-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-toc-link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: rgba(13, 21, 34, 0.6);
  color: var(--muted);
  font-size: 13.5px;
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-faq .faq-toc-link .mono {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.page-faq .faq-toc-link:hover,
.page-faq .faq-toc-link:focus-visible {
  color: var(--text);
  border-color: var(--cyan);
  background: rgba(43, 233, 224, 0.07);
}

.page-faq .faq-toc-foot {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-toc-foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 233, 224, 0.35);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  margin-top: 48px;
  scroll-margin-top: 120px;
}

.page-faq .faq-group:first-child {
  margin-top: 0;
}

.page-faq .faq-group-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  column-gap: 14px;
  align-items: start;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-index {
  font-family: var(--mono);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.15;
  color: var(--amber);
}

.page-faq .faq-group-head .section-title {
  margin: 0;
  font-size: clamp(21px, 3.2vw, 28px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-group-note {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 问答条目 ---------- */
.page-faq .qa-list {
  margin: 0;
  padding: 0;
}

.page-faq .qa-item {
  position: relative;
  padding: 20px 0 20px 16px;
  border-bottom: 1px solid var(--line);
}

.page-faq .qa-item:last-child {
  border-bottom: 0;
}

.page-faq .qa-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 25px;
  width: 2px;
  height: 15px;
  background: var(--cyan);
  opacity: 0.45;
  transition: opacity 0.2s var(--ease), height 0.2s var(--ease);
}

.page-faq .qa-item:hover::before {
  opacity: 1;
  height: 22px;
}

.page-faq .qa-q {
  margin: 0;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.65;
  color: var(--text);
}

.page-faq .qa-a {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .qa-more {
  margin-top: 12px;
}

.page-faq .qa-more summary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  color: var(--cyan);
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  cursor: pointer;
  list-style: none;
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

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

.page-faq .qa-more summary::after {
  content: "+";
  font-size: 12px;
  line-height: 1;
}

.page-faq .qa-more[open] summary::after {
  content: "−";
}

.page-faq .qa-more summary:hover,
.page-faq .qa-more summary:focus-visible {
  border-color: var(--cyan);
  background: rgba(43, 233, 224, 0.07);
}

.page-faq .qa-detail {
  margin-top: 12px;
  padding: 13px 15px;
  border-left: 2px solid var(--cyan);
  border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: var(--panel);
}

.page-faq .qa-detail p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: 22px 0 6px;
}

.page-faq .faq-figure .figure-media {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--panel);
}

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

.page-faq .faq-figure .figure-caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 奶油纸面分组 ---------- */
.page-faq .faq-group--paper {
  padding: 30px 22px 26px;
  border: 1px solid rgba(26, 20, 16, 0.14);
  border-radius: var(--r-md);
  background: var(--paper);
  color: var(--ink);
}

.page-faq .faq-group--paper .faq-group-head {
  border-bottom-color: rgba(26, 20, 16, 0.18);
}

.page-faq .faq-group--paper .faq-index {
  color: var(--faq-paper-mark);
}

.page-faq .faq-group--paper .section-title {
  color: var(--ink);
}

.page-faq .faq-group--paper .faq-group-note {
  color: #4a4038;
}

.page-faq .faq-group--paper .qa-item {
  border-bottom-color: rgba(26, 20, 16, 0.14);
}

.page-faq .faq-group--paper .qa-item::before {
  background: var(--faq-paper-mark);
  opacity: 0.6;
}

.page-faq .faq-group--paper .qa-item:hover::before {
  opacity: 1;
}

.page-faq .faq-group--paper .qa-q {
  color: var(--ink);
}

.page-faq .faq-group--paper .qa-a {
  color: #3d342c;
}

.page-faq .faq-group--paper .qa-more summary {
  color: #6d3410;
  border-color: rgba(26, 20, 16, 0.28);
}

.page-faq .faq-group--paper .qa-more summary:hover,
.page-faq .faq-group--paper .qa-more summary:focus-visible {
  border-color: var(--faq-paper-mark);
  background: rgba(168, 73, 31, 0.1);
}

.page-faq .faq-group--paper .qa-detail {
  border-left-color: var(--faq-paper-mark);
  background: rgba(26, 20, 16, 0.055);
}

.page-faq .faq-group--paper .qa-detail p {
  color: #3d342c;
}

/* ---------- 收尾 ---------- */
.page-faq .faq-cta {
  margin-top: 56px;
  padding: 28px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(135deg, rgba(123, 92, 255, 0.16), rgba(43, 233, 224, 0.06) 55%, rgba(6, 10, 18, 0) 100%);
}

.page-faq .faq-cta h2 {
  margin: 0;
  font-size: clamp(20px, 3vw, 26px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-faq .faq-cta p {
  margin: 10px 0 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

/* ---------- 焦点与降级 ---------- */
.page-faq a:focus-visible,
.page-faq summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-hero {
    padding-top: 44px;
  }

  .page-faq .qa-item {
    padding-left: 20px;
  }

  .page-faq .faq-group--paper {
    padding: 34px 32px 30px;
  }

  .page-faq .faq-cta {
    padding: 34px 32px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-toc-w) minmax(0, 1fr);
    column-gap: 54px;
    margin-top: 54px;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 104px;
    align-self: start;
    padding-bottom: 0;
    border-bottom: 0;
  }

  .page-faq .faq-toc-list {
    display: block;
  }

  .page-faq .faq-toc-list li + li {
    margin-top: 6px;
  }

  .page-faq .faq-toc-link {
    display: flex;
    width: 100%;
  }

  .page-faq .qa-item {
    padding-left: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-item::before,
  .page-faq .faq-toc-link,
  .page-faq .qa-more summary {
    transition: none;
  }
}