.page-faq {
  --faq-rail-w: 224px;
  --faq-ember-mark: 8px;
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-faq .crumb {
  padding-top: 24px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 40px 0 56px;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -90px;
  left: -12%;
  width: 72%;
  height: 420px;
  background: linear-gradient(118deg, var(--ink-hull) 0%, rgba(14, 59, 46, 0) 78%);
  clip-path: polygon(0 0, 100% 0, 80% 100%, 0 86%);
  pointer-events: none;
}

.page-faq .faq-hero__dots {
  position: absolute;
  right: 4%;
  bottom: 6%;
  width: 170px;
  height: 170px;
  background-image: radial-gradient(var(--line-moss) 1.4px, transparent 1.4px);
  background-size: 18px 18px;
  opacity: 0.5;
  pointer-events: none;
}

.page-faq .faq-hero__grid {
  position: relative;
  display: grid;
  gap: 28px;
}

.page-faq .faq-hero__lead .h-display {
  margin: 12px 0 20px;
  max-width: 16ch;
  font-size: clamp(34px, 7vw, 74px);
}

.page-faq .faq-hero__lead .lead {
  max-width: 56ch;
  color: var(--paper);
  opacity: 0.86;
}

.page-faq .faq-hero__aside {
  border-top: 1px solid var(--hair);
  padding-top: 18px;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.85;
}

.page-faq .faq-hero__aside p {
  margin: 0;
}

/* ---------- 快速索引 ---------- */
.page-faq .faq-quick-wrap {
  padding-top: 8px;
}

.page-faq .faq-quick__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.18em;
  color: var(--mist);
  text-transform: none;
}

.page-faq .faq-quick {
  display: grid;
  gap: 1px;
  background: var(--hair);
  border-top: 1px solid var(--hair);
  border-bottom: 1px solid var(--hair);
}

.page-faq .faq-quick__item {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 16px 16px;
  background: var(--ink-deep);
  color: var(--paper);
  text-decoration: none;
  transition: background 200ms var(--ease-out), color 200ms var(--ease-out);
}

.page-faq .faq-quick__item:hover,
.page-faq .faq-quick__item:focus-visible {
  background: var(--ink-hull);
  color: var(--glow);
}

.page-faq .faq-quick__num {
  flex: none;
  color: var(--glow);
  font-size: 12px;
  letter-spacing: 0.14em;
}

.page-faq .faq-quick__q {
  font-family: var(--font-display);
  font-size: 16px;
  line-height: 1.55;
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: 36px;
  padding-top: 48px;
  padding-bottom: 96px;
}

.page-faq .faq-rail {
  position: relative;
}

.page-faq .faq-rail .index-label {
  margin: 0 0 4px;
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 8px 0 0;
  padding: 0 0 10px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-rail__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-rail__link {
  display: inline-block;
  white-space: nowrap;
  padding: 8px 14px;
  border: 1px solid var(--line-moss);
  color: var(--mist);
  font-size: 13px;
  text-decoration: none;
  clip-path: polygon(0 0, 100% 0, 100% 72%, 90% 100%, 0 100%);
  transition: color 180ms var(--ease-out), border-color 180ms var(--ease-out);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--glow);
  border-color: var(--glow);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 108px;
}

.page-faq .faq-group + .faq-group {
  margin-top: 64px;
  padding-top: 44px;
  border-top: 1px solid var(--hair);
}

.page-faq .faq-group__head {
  margin-bottom: 26px;
}

.page-faq .faq-group__head .h-section {
  margin: 10px 0 12px;
}

.page-faq .faq-group__desc {
  margin: 0;
  max-width: 60ch;
  color: var(--mist);
  font-size: 16px;
  line-height: 1.85;
}

.page-faq .faq-figure {
  margin: 0 0 30px;
}

.page-faq .faq-figure--inline {
  margin: 26px 0;
}

/* ---------- 折叠条目 ---------- */
.page-faq .fold {
  border-bottom: 1px solid var(--hair);
  scroll-margin-top: 108px;
}

.page-faq .fold:target {
  background: linear-gradient(90deg, rgba(53, 242, 200, 0.07), rgba(53, 242, 200, 0) 62%);
}

.page-faq .fold__btn {
  width: 100%;
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 20px 6px;
  background: none;
  border: 0;
  color: var(--paper);
  font-family: var(--font-display);
  font-size: 17px;
  line-height: 1.55;
  text-align: left;
  cursor: pointer;
  transition: color 180ms var(--ease-out);
}

.page-faq .fold__btn:hover,
.page-faq .fold__btn:focus-visible {
  color: var(--glow);
}

.page-faq .fold__num {
  flex: none;
  padding-top: 0.34em;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--glow);
}

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

.page-faq .fold__sign {
  position: relative;
  flex: none;
  width: 12px;
  height: 12px;
  margin-top: 0.5em;
}

.page-faq .fold__sign::before,
.page-faq .fold__sign::after {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 12px;
  height: 1.5px;
  background: var(--glow);
  transform: translateY(-50%);
  transition: transform 220ms var(--ease-out), opacity 220ms var(--ease-out);
}

.page-faq .fold__sign::after {
  transform: translateY(-50%) rotate(90deg);
}

.page-faq .fold[data-open="true"] .fold__sign::after {
  transform: translateY(-50%) rotate(0deg);
  opacity: 0;
}

.page-faq .fold__panel {
  padding: 2px 6px 28px 42px;
  border-left: 2px solid transparent;
  color: var(--mist);
  font-size: 16px;
  line-height: 1.85;
  transition: border-color 220ms var(--ease-out);
}

.page-faq .fold[data-open="false"] .fold__panel {
  display: none;
}

.page-faq .fold[data-open="true"] .fold__panel {
  border-left-color: var(--glow);
}

.page-faq .fold__panel p {
  margin: 0 0 0.9em;
}

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

.page-faq .faq-points {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-faq .faq-points li {
  position: relative;
  padding-left: 22px;
}

.page-faq .faq-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.66em;
  width: var(--faq-ember-mark);
  height: var(--faq-ember-mark);
  background: var(--ember);
}

.page-faq .faq-panel__foot {
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--hair);
  font-size: 15px;
  color: var(--mist);
}

.page-faq .faq-link {
  color: var(--glow);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 242, 200, 0.4);
  transition: border-color 180ms var(--ease-out);
}

.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  border-bottom-color: var(--glow);
}

.page-faq .faq-link--dark {
  color: var(--ink-hull);
  border-bottom-color: rgba(14, 59, 46, 0.4);
}

.page-faq .faq-link--dark:hover,
.page-faq .faq-link--dark:focus-visible {
  border-bottom-color: var(--ink-hull);
}

/* ---------- 联系引导 ---------- */
.page-faq .faq-group--contact {
  border-top: 1px solid var(--hair);
}

.page-faq .faq-contact__card {
  display: grid;
  gap: 24px;
  padding: 34px 22px;
}

.page-faq .faq-contact__card .h-section {
  margin: 10px 0 14px;
}

.page-faq .faq-contact__card .prose {
  max-width: 58ch;
}

.page-faq .faq-contact__actions {
  display: grid;
  gap: 12px;
  align-content: start;
  justify-items: start;
}

.page-faq .faq-contact__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--line-moss);
}

/* ---------- 常驻纠错入口 ---------- */
.page-faq .faq-fix {
  position: fixed;
  right: 14px;
  bottom: 14px;
  z-index: 30;
  display: inline-block;
  padding: 10px 16px;
  background: var(--ink-hull);
  border: 1px solid var(--glow);
  color: var(--glow);
  font-size: 13px;
  letter-spacing: 0.04em;
  text-decoration: none;
  clip-path: polygon(0 0, 100% 0, 100% 68%, 88% 100%, 0 100%);
  box-shadow: 0 10px 30px rgba(6, 35, 28, 0.85);
}

.page-faq .faq-fix:hover,
.page-faq .faq-fix:focus-visible {
  background: var(--glow);
  color: var(--ink-black);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-quick {
    grid-template-columns: 1fr 1fr;
  }

  .page-faq .faq-quick__item {
    padding: 18px 22px;
  }

  .page-faq .faq-hero__aside {
    padding-left: 22px;
    border-top: 0;
    border-left: 1px solid var(--hair);
    padding-top: 4px;
  }

  .page-faq .faq-contact__card {
    padding: 44px 40px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero {
    padding: 64px 0 72px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 56px;
    align-items: end;
  }

  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 68px;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 92px;
    align-self: start;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    gap: 0;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-faq .faq-rail__link {
    display: block;
    padding: 11px 0 11px 14px;
    border: 0;
    border-left: 2px solid var(--line-moss);
    clip-path: none;
    font-size: 14px;
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    border-left-color: var(--glow);
    color: var(--paper);
  }

  .page-faq .fold__btn {
    font-size: 19px;
    padding: 22px 8px;
  }

  .page-faq .faq-contact__card {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.9fr);
    align-items: center;
    gap: 40px;
    padding: 56px 52px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-quick__item,
  .page-faq .faq-rail__link,
  .page-faq .fold__btn,
  .page-faq .fold__panel,
  .page-faq .fold__sign::before,
  .page-faq .fold__sign::after,
  .page-faq .faq-link,
  .page-faq .faq-fix {
    transition: none;
  }
}