.page-faq {
  --faq-index-w: 208px;
  --faq-num-w: 22px;
  display: block;
  background: var(--cream-paper);
  color: var(--slate-ink);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumb-wrap {
  padding-block: 14px 0;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background: var(--cream-paper);
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(48%, 620px);
  background:
    repeating-linear-gradient(112deg, transparent 0 22px, rgba(33, 230, 193, .14) 22px 23px),
    radial-gradient(circle at 72% 26%, rgba(255, 122, 47, .16), transparent 62%);
  pointer-events: none;
}
.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  max-width: 720px;
  padding-block: clamp(24px, 4vw, 46px) clamp(22px, 3.4vw, 40px);
}
.page-faq .faq-hero h1 {
  margin: 10px 0 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(27px, 4.4vw, 50px);
  line-height: 1.14;
  letter-spacing: -.012em;
  color: var(--ink-pitch);
}
.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 60ch;
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.8;
  color: var(--slate-ink);
}
.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}
.page-faq .faq-hero__facts li {
  padding: 6px 12px;
  border: 1px solid var(--warm-gray);
  background: var(--cold-white);
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-pitch);
}
.page-faq .faq-hero__facts .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--signal-orange);
  font-weight: 600;
}

/* ---------- 色带 ---------- */
.page-faq .faq-band {
  height: 4px;
  background: linear-gradient(90deg, var(--pulse-cyan), var(--signal-orange) 52%, var(--panel-teal));
}

/* ---------- 主体 ---------- */
.page-faq .faq-body {
  background: var(--cream-paper);
}
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 44px);
  padding-block: clamp(26px, 4vw, 56px);
}
.page-faq .faq-groups {
  min-width: 0;
}

/* ---------- 左侧场景索引 ---------- */
.page-faq .faq-index {
  border-left: 3px solid var(--pulse-cyan);
  padding-left: 12px;
  min-width: 0;
}
.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--ink-pitch);
}
.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}
.page-faq .faq-index__list li {
  flex: 0 0 auto;
}
.page-faq .faq-index__list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 13px;
  border: 1px solid var(--warm-gray);
  background: var(--cold-white);
  color: var(--slate-ink);
  font-size: 13.5px;
  line-height: 1.5;
  text-decoration: none;
  white-space: nowrap;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}
.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  background: var(--ink-pitch);
  border-color: var(--ink-pitch);
  color: var(--cream-paper);
  outline: none;
}
.page-faq .faq-index__no {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted-cyan);
}
.page-faq .faq-index__list a:hover .faq-index__no,
.page-faq .faq-index__list a:focus-visible .faq-index__no {
  color: var(--pulse-cyan);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  padding-top: clamp(18px, 2.6vw, 28px);
  border-top: 1px solid var(--line);
  scroll-margin-top: 96px;
}
.page-faq .faq-group + .faq-group {
  margin-top: clamp(26px, 3.4vw, 44px);
}
.page-faq .faq-group:target {
  border-top-color: var(--pulse-cyan);
}
.page-faq .faq-group:target .chapter-no {
  color: var(--signal-orange);
}
.page-faq .faq-group .chapter-head {
  margin-bottom: 14px;
}
.page-faq .faq-group h2 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(21px, 2.5vw, 30px);
  line-height: 1.24;
  letter-spacing: -.008em;
  color: var(--ink-pitch);
}
.page-faq .faq-group .chapter-head__body p {
  margin: 0;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--slate-ink);
}

/* ---------- 可展开问答 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 10px;
}
.page-faq .faq-item {
  background: var(--cold-white);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-paper);
}
.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 17px;
  list-style: none;
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink-pitch);
  transition: background .2s var(--ease), color .2s var(--ease);
}
.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item > summary::after {
  content: "+";
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.3;
  color: var(--signal-orange);
}
.page-faq .faq-item > summary:hover {
  background: var(--cream-paper);
}
.page-faq .faq-item > summary:focus-visible {
  outline: 2px solid var(--pulse-cyan);
  outline-offset: -2px;
}
.page-faq .faq-item[open] > summary {
  background: var(--ink-pitch);
  color: var(--cream-paper);
}
.page-faq .faq-item[open] > summary::after {
  content: "–";
  color: var(--pulse-cyan);
}
.page-faq .faq-item__body {
  padding: 14px 17px 18px;
  border-left: 3px solid var(--pulse-cyan);
  background: var(--cold-white);
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--slate-ink);
}
.page-faq .faq-item__body p {
  margin: 0;
}

/* ---------- 编号步骤 ---------- */
.page-faq .faq-steps {
  counter-reset: faqstep;
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-faq .faq-steps li {
  counter-increment: faqstep;
  display: grid;
  grid-template-columns: var(--faq-num-w) minmax(0, 1fr);
  gap: 10px;
  align-items: start;
}
.page-faq .faq-steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  width: 20px;
  height: 20px;
  line-height: 20px;
  border: 1px solid var(--ink-pitch);
  border-radius: 50%;
  background: var(--amber-soft);
  color: var(--ink-pitch);
  font-family: var(--font-mono);
  font-size: 10px;
  text-align: center;
}

/* ---------- 区间刻度 ---------- */
.page-faq .faq-scale {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 16px 0 0;
  border: 1px solid var(--ink-pitch);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .04em;
  white-space: nowrap;
}
.page-faq .faq-scale__seg {
  padding: 7px 4px;
  text-align: center;
  overflow: hidden;
  text-overflow: ellipsis;
}
.page-faq .faq-scale__seg--top {
  background: var(--pulse-cyan);
  color: var(--ink-deep);
}
.page-faq .faq-scale__seg--mid {
  background: var(--warm-gray);
  color: var(--ink-pitch);
}
.page-faq .faq-scale__seg--low {
  background: var(--panel-teal);
  color: var(--cream-paper);
}

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: 20px 0 0;
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 字号预览 ---------- */
.page-faq .faq-preview {
  margin-top: 20px;
  padding: 16px;
  border: 1px solid var(--ink-pitch);
  background: var(--cream-paper);
  box-shadow: var(--shadow-paper);
}
.page-faq .faq-preview__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 14px;
  margin-bottom: 14px;
}
.page-faq .faq-preview__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--ink-pitch);
}
.page-faq .faq-preview__panel {
  padding: 14px 16px;
  border-left: 3px solid var(--pulse-cyan);
  background: var(--cold-white);
  max-width: 68ch;
}
.page-faq .faq-preview__text {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink-pitch);
  overflow-wrap: break-word;
}
.page-faq .faq-preview__text--sm {
  font-size: 14px;
  line-height: 1.7;
}
.page-faq .faq-preview__text--md {
  font-size: 17px;
  line-height: 1.85;
}
.page-faq .faq-preview__text--lg {
  font-size: 21px;
  line-height: 1.9;
}
.page-faq .faq-preview__note {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate-ink);
}

/* ---------- 收束区 ---------- */
.page-faq .faq-outro {
  position: relative;
  overflow: hidden;
  background: var(--ink-pitch);
  color: var(--cream-paper);
}
.page-faq .faq-outro::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--pulse-cyan), var(--signal-orange) 55%, var(--panel-teal));
}
.page-faq .faq-outro__inner {
  max-width: 700px;
  padding-block: clamp(28px, 4vw, 52px);
}
.page-faq .faq-outro h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 33px);
  line-height: 1.22;
  color: var(--cold-white);
}
.page-faq .faq-outro p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted-cyan);
}
.page-faq .faq-outro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}
.page-faq .faq-outro__actions .btn--ghost {
  color: var(--cream-paper);
  border-color: rgba(246, 241, 228, .38);
}

/* ---------- 桌面 ---------- */
@media (min-width: 1040px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
  }
  .page-faq .faq-index {
    position: sticky;
    top: 96px;
    align-self: start;
  }
  .page-faq .faq-index__list {
    display: grid;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-faq .faq-index__list a {
    border-color: transparent;
    background: transparent;
    padding: 9px 10px;
    white-space: normal;
  }
  .page-faq .faq-index__list a:hover,
  .page-faq .faq-index__list a:focus-visible {
    background: var(--cold-white);
    border-color: var(--warm-gray);
    color: var(--ink-pitch);
  }
  .page-faq .faq-index__list a:hover .faq-index__no,
  .page-faq .faq-index__list a:focus-visible .faq-index__no {
    color: var(--signal-orange);
  }
  .page-faq .faq-item > summary {
    font-size: 17px;
    padding: 17px 20px;
  }
  .page-faq .faq-item__body {
    padding: 16px 20px 20px;
  }
  .page-faq .faq-preview {
    padding: 20px;
  }
}

@media (min-width: 1400px) {
  .page-faq .faq-shell {
    grid-template-columns: 236px minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item > summary,
  .page-faq .faq-index__list a {
    transition: none;
  }
}