.page-faq {
  --faq-rail: 264px;
  --faq-gap-x: clamp(24px, 4vw, 56px);
  --faq-gap-y: clamp(18px, 2.4vw, 30px);
  background: var(--ink-900);
  color: var(--chalk);
  font-family: var(--font-body);
  line-height: 1.75;
  padding-bottom: clamp(48px, 7vw, 96px);
  overflow-x: clip;
}

.page-faq .breadcrumbs {
  padding-top: clamp(18px, 3vw, 30px);
  font-size: 13px;
  font-family: var(--font-mono);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: clamp(20px, 3.4vw, 40px);
  padding-bottom: clamp(20px, 3vw, 36px);
}

.page-faq .faq-hero__in {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3vw, 40px);
  align-items: end;
}

.page-faq .faq-hero__text .u-label {
  display: block;
  color: var(--lime-400);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  margin: 0 0 14px;
}

.page-faq .faq-hero__text h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6.2vw, 4.1rem);
  line-height: 1.06;
  letter-spacing: .01em;
  margin: 0 0 18px;
  color: var(--chalk);
  max-width: 20ch;
}

.page-faq .faq-hero__lead {
  margin: 0 0 22px;
  max-width: 62ch;
  font-size: clamp(15px, 1.6vw, 17px);
  color: var(--muted);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  margin: 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--hair);
  list-style: none;
  font-size: 13px;
  color: var(--muted);
}

.page-faq .faq-hero__meta .u-mono {
  color: var(--lime-400);
  font-size: 15px;
  margin-right: 4px;
}

.page-faq .faq-hero__figure {
  margin: 0;
}

.page-faq .faq-hero__figure .figure__frame {
  border: 1px solid var(--hair);
}

/* ---------- 筛选条 ---------- */
.page-faq .faq-filter {
  border-top: 1px solid var(--hair);
  border-bottom: 1px solid var(--hair);
  padding: 12px 0;
  margin-bottom: clamp(24px, 3.4vw, 44px);
}

.page-faq .filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.page-faq .filter-bar__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--steel-600);
  margin-right: 6px;
}

/* ---------- 骨架分栏 ---------- */
.page-faq .faq-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3vw, 36px);
}

/* ---------- 左侧索引 ---------- */
.page-faq .faq-rail {
  border-top: 2px solid var(--lime-400);
  padding-top: 14px;
}

.page-faq .faq-rail__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--paper-300);
}

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

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 8px 12px;
  border: 1px solid var(--hair);
  color: var(--chalk);
  font-size: 14px;
  text-decoration: none;
  transition: border-color .2s linear, color .2s linear, background-color .2s linear;
}

.page-faq .faq-rail__no {
  font-size: 11px;
  color: var(--lime-600);
  letter-spacing: .06em;
}

.page-faq .faq-rail__link--alt {
  border-style: dashed;
  color: var(--alert-300);
}

.page-faq .faq-rail__note {
  margin: 12px 0 0;
  font-size: 12px;
  line-height: 1.6;
  color: var(--steel-600);
  max-width: 40ch;
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 110px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(34px, 4.6vw, 62px);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--hair);
  margin-bottom: 16px;
}

.page-faq .faq-group__no {
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--lime-400);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.6vw, 1.95rem);
  line-height: 1.15;
  letter-spacing: .05em;
  color: var(--chalk);
}

.page-faq .faq-group__count {
  margin-left: auto;
  font-size: 12px;
  color: var(--muted);
}

/* ---------- 问答题 ---------- */
.page-faq .qa-list {
  display: grid;
  gap: 10px;
}

.page-faq .qa {
  border: 1px solid var(--hair);
  background: var(--ink-800);
  transition: border-color .2s linear, background-color .2s linear;
}

.page-faq .qa:hover {
  border-color: var(--lime-600);
}

.page-faq .qa.is-open,
.page-faq .qa[data-open="true"] {
  border-color: var(--lime-400);
  background: var(--ink-700);
}

.page-faq .qa__q {
  margin: 0;
  font-size: 1rem;
  font-weight: 400;
}

.page-faq .qa__toggle {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  min-height: 58px;
  padding: 15px 16px;
  background: none;
  border: 0;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.page-faq .qa__toggle:focus-visible {
  outline: 2px solid var(--lime-400);
  outline-offset: -2px;
}

.page-faq .qa__no {
  flex: none;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--steel-600);
}

.page-faq .qa__dot {
  flex: none;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background: var(--lime-400);
}

.page-faq .qa__text {
  flex: 1 1 auto;
  min-width: 0;
  font-size: clamp(15px, 1.7vw, 16.5px);
  line-height: 1.55;
  color: var(--chalk);
}

.page-faq .qa__sign {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
}

.page-faq .qa__sign::before,
.page-faq .qa__sign::after {
  content: "";
  position: absolute;
  background: var(--lime-400);
  transition: transform .2s ease, opacity .2s ease;
}

.page-faq .qa__sign::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-faq .qa__sign::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}

.page-faq .qa.is-open .qa__sign::after,
.page-faq .qa[data-open="true"] .qa__sign::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .qa__panel {
  display: none;
}

.page-faq .qa.is-open .qa__panel,
.page-faq .qa[data-open="true"] .qa__panel {
  display: block;
}

.page-faq .qa__panel-inner {
  padding: 0 16px 18px 46px;
  border-top: 1px solid var(--hair-soft);
  padding-top: 14px;
}

.page-faq .qa__panel-inner p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

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

.page-faq .qa__panel-inner a {
  color: var(--lime-400);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .qa__panel-inner a:hover {
  color: var(--lime-600);
}

/* ---------- 分组色点 ---------- */
.page-faq .faq-group--browse .qa__dot { background: var(--lime-400); }
.page-faq .faq-group--check .qa__dot { background: var(--paper-300); }
.page-faq .faq-group--fix .qa__dot { background: var(--alert-500); }
.page-faq .faq-group--account .qa__dot { background: var(--steel-600); }
.page-faq .faq-group--update .qa__dot { background: var(--lime-600); }

/* ---------- 带图分组 ---------- */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap-y);
}

.page-faq .faq-split__fig {
  margin: 0;
}

.page-faq .faq-split__fig .figure__frame {
  border: 1px solid var(--hair);
}

/* ---------- 收尾说明牌 ---------- */
.page-faq .faq-lost {
  margin-top: clamp(44px, 6vw, 84px);
  scroll-margin-top: 110px;
}

.page-faq .faq-lost__card {
  padding: clamp(24px, 3.4vw, 42px);
  color: var(--ink-900);
}

.page-faq .faq-lost__card .u-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--alert-500);
  margin: 0 0 12px;
}

.page-faq .faq-lost__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3.4vw, 2.3rem);
  line-height: 1.15;
  letter-spacing: .04em;
  color: var(--ink-900);
}

.page-faq .faq-lost__body {
  margin: 0 0 20px;
  max-width: 68ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink-700);
}

.page-faq .faq-lost__body a {
  color: var(--ink-900);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 500;
}

/* ---------- 断点 ---------- */
@media (min-width: 860px) {
  .page-faq .faq-hero__in {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  }

  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, .65fr);
    align-items: start;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: var(--faq-gap-x);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 104px;
    border-top: 0;
    border-left: 2px solid var(--lime-400);
    padding: 4px 0 4px 18px;
  }

  .page-faq .faq-rail__title {
    margin-bottom: 12px;
  }

  .page-faq .faq-rail__list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-rail__link {
    display: flex;
    width: 100%;
    padding: 9px 12px 9px 0;
    border: 0;
    border-right: 3px solid transparent;
    color: var(--muted);
    font-size: 14.5px;
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    color: var(--lime-400);
    border-right-color: var(--lime-400);
    background: none;
  }

  .page-faq .faq-rail__link--alt {
    margin-top: 8px;
    border: 1px dashed var(--hair);
    border-right: 3px solid transparent;
    padding-left: 10px;
    color: var(--alert-300);
    font-size: 13.5px;
  }

  .page-faq .qa__panel-inner {
    padding-left: 60px;
    padding-right: 30px;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-hero__text h1 {
    max-width: 24ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__sign::before,
  .page-faq .qa__sign::after,
  .page-faq .faq-rail__link {
    transition: opacity .2s linear;
  }
}