.page-faq {
  display: block;
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--ink-deep);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero-img {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 72% 50%;
  opacity: 0.42;
  filter: saturate(0.45) contrast(1.06);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(100deg, rgba(3, 8, 7, 0.96) 0%, rgba(6, 18, 15, 0.84) 50%, rgba(6, 18, 15, 0.48) 100%);
}

.page-faq .faq-hero-inner {
  position: relative;
  padding-block: clamp(38px, 6.5vw, 74px) clamp(32px, 5.5vw, 60px);
}

.page-faq .faq-hero .display-title {
  margin: 14px 0 18px;
  max-width: 20ch;
}

.page-faq .faq-hero .lead {
  margin: 0 0 22px;
  max-width: 62ch;
  color: var(--mist);
}

/* ---------- 数据条 ---------- */
.page-faq .faq-stats {
  background: var(--ink-panel);
  border-bottom: 1px solid var(--line-soft);
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
  gap: 30px;
  padding-block: clamp(34px, 5.5vw, 66px);
}

/* ---------- 左侧分类索引 ---------- */
.page-faq .faq-index-list {
  list-style: none;
  margin: 10px 0 0;
  padding: 0 0 6px;
  display: flex;
  flex-direction: row;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 10px;
  border-bottom: 2px solid var(--line-soft);
  color: var(--mist);
  font-size: 14px;
  white-space: nowrap;
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  color: var(--cream);
  border-bottom-color: var(--cyan);
  background-color: rgba(34, 224, 200, 0.06);
}

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

.page-faq .faq-index-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--heat);
}

.page-faq .faq-index-note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

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

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

/* ---------- 答案列 ---------- */
.page-faq .faq-answers {
  display: flex;
  flex-direction: column;
  gap: clamp(34px, 5vw, 56px);
  min-width: 0;
}

.page-faq .faq-group {
  scroll-margin-top: 96px;
}

.page-faq .faq-group-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-bottom: 12px;
  margin-bottom: 6px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-faq .section-title {
  margin: 0;
  font-size: clamp(21px, 2.4vw, 30px);
}

/* ---------- 折叠问答 ---------- */
.page-faq .fold {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .fold > summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 12px;
  padding: 15px 2px;
  cursor: pointer;
  list-style: none;
  color: var(--cream);
  transition: color 0.18s var(--ease);
}

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

.page-faq .fold > summary:hover {
  color: var(--cyan);
}

.page-faq .fold > summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-faq .faq-q-index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--heat);
  padding-top: 5px;
}

.page-faq .faq-q-text {
  font-size: clamp(16px, 1.6vw, 19px);
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: -0.01em;
}

.page-faq .fold-mark {
  position: relative;
  align-self: center;
  width: 14px;
  height: 14px;
  flex: none;
}

.page-faq .fold-mark::before,
.page-faq .fold-mark::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform 0.22s var(--ease), opacity 0.22s var(--ease);
}

.page-faq .fold-mark::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 1.5px;
}

.page-faq .fold-mark::after {
  left: 6px;
  top: 0;
  width: 1.5px;
  height: 14px;
}

.page-faq .fold[open] .fold-mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .fold-body {
  padding: 2px 2px 18px clamp(0px, 2.4vw, 30px);
  margin: 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.78;
}

.page-faq .fold-body p {
  margin: 0 0 10px;
  max-width: 66ch;
}

.page-faq .fold-body p:last-child {
  margin-bottom: 0;
}

/* ---------- 约看配图 ---------- */
.page-faq .faq-media-split {
  display: grid;
  gap: 22px;
}

.page-faq .faq-figure {
  margin: 0;
  order: -1;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 250px;
  height: auto;
  aspect-ratio: 2 / 3;
  object-fit: cover;
  object-position: 50% 32%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  filter: saturate(0.5) contrast(1.04);
}

.page-faq .faq-figure .figure-caption {
  margin-top: 8px;
  max-width: 250px;
  color: var(--mist);
  font-size: 12px;
  line-height: 1.6;
  letter-spacing: 0.04em;
}

/* ---------- 联系收束 ---------- */
.page-faq .faq-help {
  position: relative;
  padding: clamp(22px, 4vw, 38px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(34, 224, 200, 0.1), transparent 58%),
    linear-gradient(160deg, rgba(12, 31, 26, 0.94), rgba(3, 8, 7, 0.95));
  box-shadow: var(--shadow-panel);
  scroll-margin-top: 96px;
}

.page-faq .faq-help .section-title {
  margin: 10px 0 12px;
}

.page-faq .faq-help .lead {
  margin: 0 0 22px;
  max-width: 62ch;
  color: var(--mist);
}

.page-faq .faq-help-grid {
  display: grid;
  gap: 18px;
}

.page-faq .faq-help-item {
  padding-top: 13px;
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-help-label {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-help-value {
  margin: 0;
  color: var(--cream);
  font-size: 15px;
  line-height: 1.65;
  word-break: break-word;
}

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

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

.page-faq .faq-help-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-help-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 30px;
  }
}

/* ---------- 桌面双栏 ---------- */
@media (min-width: 960px) {
  .page-faq .faq-body {
    grid-template-columns: 248px minmax(0, 1fr);
    gap: clamp(34px, 4.5vw, 62px);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 92px;
  }

  .page-faq .faq-index-list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index-link {
    border-bottom-color: transparent;
    border-left: 2px solid var(--line-soft);
    white-space: normal;
  }

  .page-faq .faq-index-link:hover,
  .page-faq .faq-index-link:focus-visible {
    border-bottom-color: transparent;
    border-left-color: var(--cyan);
  }

  .page-faq .faq-media-split {
    grid-template-columns: minmax(0, 1fr) 216px;
    gap: 30px;
    align-items: start;
  }

  .page-faq .faq-figure {
    order: 0;
  }

  .page-faq .faq-figure img,
  .page-faq .faq-figure .figure-caption {
    max-width: none;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index-link,
  .page-faq .fold > summary,
  .page-faq .fold-mark::before,
  .page-faq .fold-mark::after {
    transition: none;
  }
}