.page-faq {
  --faq-index-w: 216px;
  --faq-edge: 3px;
  padding-bottom: 64px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-head {
  position: relative;
  padding-top: 8px;
}

.page-faq .faq-head__kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-amber);
}

.page-faq .page-head__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 6vw, 54px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--c-ivory);
}

.page-faq .page-head__lede {
  max-width: 62ch;
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-text);
}

.page-faq .faq-head__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

/* ---------- 六问速览 ---------- */
.page-faq .faq-quick {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.page-faq .faq-quick__link {
  display: flex;
  align-items: baseline;
  gap: 12px;
  height: 100%;
  padding: 14px 16px;
  background: var(--c-pitch);
  border: 1px solid var(--line-soft);
  border-left: var(--faq-edge) solid var(--c-cyan);
  border-radius: 0 12px 12px 0;
  color: var(--c-text);
  text-decoration: none;
  font-size: 15px;
  line-height: 1.6;
  transition: background 160ms ease, transform 160ms ease, border-color 160ms ease;
}

.page-faq .faq-quick__link:hover,
.page-faq .faq-quick__link:focus-visible {
  background: var(--c-glass);
  border-left-color: var(--c-amber);
  transform: translateX(2px);
}

.page-faq .faq-quick__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--c-amber);
}

.page-faq .faq-quick__text {
  flex: 1 1 auto;
}

/* ---------- 双列外壳 ---------- */
.page-faq .faq-shell {
  margin-top: 44px;
}

.page-faq .faq-index {
  margin: 0 0 20px;
}

.page-faq .faq-index__title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-mute);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0 0 6px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  color: var(--c-text);
  text-decoration: none;
  background: rgba(20, 70, 58, 0.35);
  transition: color 160ms ease, border-color 160ms ease;
}

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

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 12px;
  color: var(--c-amber);
}

/* ---------- 筛选条 ---------- */
.page-faq .faq-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line-soft);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  padding: 26px 0 10px;
  border-top: 1px solid var(--line-soft);
  scroll-margin-top: 80px;
}

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

.page-faq .faq-group__head {
  position: relative;
  padding-left: 14px;
  margin-bottom: 18px;
}

.page-faq .faq-group__head::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 3px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--c-green), var(--c-cyan));
}

.page-faq .faq-group__num {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.16em;
  color: var(--c-amber);
}

.page-faq .faq-group__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.6vw, 34px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--c-ivory);
}

.page-faq .faq-group__lede {
  margin: 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-mute);
}

/* ---------- 折叠面板 ---------- */
.page-faq .faq-panel {
  margin: 0 0 10px;
  background: var(--c-rock);
  border: 1px solid var(--line-soft);
  border-left: var(--faq-edge) solid var(--c-green);
  border-radius: 0 12px 12px 0;
  overflow: hidden;
  transition: border-color 160ms ease, background 160ms ease;
}

.page-faq .faq-panel[open] {
  border-left-color: var(--c-cyan);
  background: #26332C;
}

.page-faq .faq-panel > .panel__summary {
  position: relative;
  padding: 16px 44px 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--c-ivory);
}

.page-faq .faq-panel > .panel__summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-panel > .panel__summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 600;
  line-height: 1;
  color: var(--c-cyan);
  transition: transform 160ms ease;
}

.page-faq .faq-panel[open] > .panel__summary::after {
  content: "–";
  color: var(--c-amber);
}

.page-faq .faq-panel > .panel__summary:hover {
  color: var(--c-cyan);
}

.page-faq .faq-panel > .panel__body {
  padding: 0 18px 18px;
}

.page-faq .faq-panel > .panel__body p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--c-text);
}

.page-faq .faq-panel > .panel__body p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-panel__more {
  padding-top: 8px;
  border-top: 1px dashed var(--line);
}

.page-faq .faq-panel__more a {
  color: var(--c-cyan);
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
}

.page-faq .faq-panel__more a:hover,
.page-faq .faq-panel__more a:focus-visible {
  color: var(--c-amber);
  text-decoration: underline;
}

/* ---------- 图像 ---------- */
.page-faq .faq-media {
  margin: 20px 0 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--c-pitch);
}

.page-faq .faq-media .media__item {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-media .media__caption {
  padding: 12px 16px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-mute);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 下一步 ---------- */
.page-faq .faq-next {
  margin-top: 36px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-next__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.01em;
  color: var(--c-ivory);
}

.page-faq .faq-next__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-faq .faq-next__card {
  display: block;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(30, 122, 71, 0.28), rgba(15, 44, 30, 0.9));
  color: var(--c-text);
  text-decoration: none;
  transition: border-color 180ms ease, transform 180ms ease;
}

.page-faq .faq-next__card:hover,
.page-faq .faq-next__card:focus-visible {
  border-color: var(--c-cyan);
  transform: translateY(-2px);
}

.page-faq .faq-next__tag {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--c-amber);
}

.page-faq .faq-next__text {
  display: block;
  font-size: 14px;
  line-height: 1.7;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-quick {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-next__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-quick {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-shell {
    display: grid;
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: 44px;
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 24px;
    margin-bottom: 0;
    padding-bottom: 16px;
  }

  .page-faq .faq-index__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
    border-left: 1px solid var(--line-soft);
  }

  .page-faq .faq-index__link {
    display: flex;
    margin-left: -1px;
    padding: 9px 0 9px 14px;
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    background: transparent;
    white-space: normal;
    line-height: 1.45;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    border-left-color: var(--c-cyan);
    color: var(--c-cyan);
  }

  .page-faq .faq-body {
    min-width: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-quick__link,
  .page-faq .faq-next__card,
  .page-faq .faq-panel > .panel__summary::after {
    transition: none;
  }

  .page-faq .faq-quick__link:hover,
  .page-faq .faq-next__card:hover {
    transform: none;
  }
}