.page-faq {
  --faq-rail-bg: var(--night-ink);
  --faq-soft: rgba(247, 245, 240, 0.7);
  --faq-drift: clamp(18px, 2.6vw, 34px);
  padding-bottom: 72px;
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumb {
  margin-bottom: 18px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: 26px;
  padding-bottom: 34px;
  border-bottom: 2px solid var(--graphite);
}

.page-faq .faq-hero__eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-faq .faq-hero__eyebrow::before {
  content: "";
  width: 30px;
  height: 8px;
  flex: none;
  background: linear-gradient(90deg, var(--referee-red) 0 50%, var(--warn-yellow) 50% 100%);
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 6.4vw, 54px);
  line-height: 1.08;
  letter-spacing: 0.005em;
  color: var(--graphite);
}

.page-faq .faq-hero__lede {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: 16.5px;
  line-height: 1.78;
  color: var(--graphite);
}

.page-faq .faq-hero__facts {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.page-faq .faq-hero__facts li {
  border-top: 2px solid var(--graphite);
  padding-top: 9px;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--slate);
}

.page-faq .faq-hero__facts .stat-num {
  color: var(--referee-red);
  font-size: 24px;
  margin-right: 4px;
  vertical-align: -2px;
}

.page-faq .faq-hero__media {
  border: 1px solid var(--hairline);
  box-shadow: var(--stack-shadow);
}

/* ---------- 左右分栏 ---------- */
.page-faq .faq-shell {
  display: grid;
  gap: var(--faq-drift);
  margin-top: 40px;
}

/* ---------- 左侧分类轨道 ---------- */
.page-faq .faq-rail {
  background: var(--faq-rail-bg);
  color: var(--paper);
  border-radius: var(--radius);
  padding: 20px 18px 16px;
  box-shadow: var(--stack-shadow);
}

.page-faq .faq-rail__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--faq-soft);
}

.page-faq .faq-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 10px 10px 9px;
  border-left: 3px solid transparent;
  border-bottom: 1px solid var(--rail-line);
  color: var(--paper);
  font-size: 15px;
  line-height: 1.4;
  text-decoration: none;
  transition: background 200ms var(--ease), border-color 200ms var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  background: rgba(247, 245, 240, 0.08);
  border-left-color: var(--referee-red);
}

.page-faq .faq-rail__idx {
  flex: none;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--warn-yellow);
}

.page-faq .faq-rail__top {
  display: inline-block;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--faq-soft);
  text-decoration: none;
  border-bottom: 1px dashed var(--rail-line);
  padding-bottom: 2px;
}

.page-faq .faq-rail__top:hover,
.page-faq .faq-rail__top:focus-visible {
  color: var(--warn-yellow);
}

/* ---------- 问答区块 ---------- */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--bar-h) + 24px);
}

.page-faq .faq-group + .faq-group {
  margin-top: 48px;
}

.page-faq .faq-list {
  margin-top: 18px;
}

.page-faq .faq-list--tight {
  margin-top: 24px;
}

.page-faq .faq-item {
  padding: 0;
  margin: 0 0 12px;
  overflow: hidden;
}

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

.page-faq .faq-item__q {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--graphite);
  list-style: none;
}

.page-faq .faq-item__q::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--referee-red);
  outline-offset: -2px;
}

.page-faq .faq-item__mark {
  flex: none;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  border: 1.5px solid var(--referee-red);
  border-radius: 50%;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--referee-red);
}

.page-faq .faq-item__text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-item__chev {
  flex: none;
  color: var(--slate);
  transition: transform 220ms var(--ease);
}

.page-faq .faq-item[open] .faq-item__chev {
  transform: rotate(180deg);
}

.page-faq .faq-item[open] .faq-item__mark {
  background: var(--referee-red);
  color: var(--paper);
}

.page-faq .faq-item__a {
  padding: 0 16px 18px 50px;
  border-top: 1px dashed var(--hairline);
  margin-top: -1px;
  padding-top: 14px;
}

.page-faq .faq-item__a p {
  margin: 0 0 10px;
  max-width: 38em;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--graphite);
}

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

.page-faq .faq-item__a a {
  color: var(--pitch-ink);
  text-decoration: underline;
  text-decoration-color: var(--warn-yellow);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  color: var(--referee-red);
  text-decoration-color: var(--referee-red);
}

/* ---------- 联系与纠错 ---------- */
.page-faq .faq-contact {
  display: grid;
  gap: 20px;
  margin-top: 18px;
}

.page-faq .faq-contact__panel {
  position: relative;
  background: var(--night-ink);
  color: var(--paper);
  border-radius: var(--radius);
  padding: 26px 22px 24px;
  box-shadow: var(--stack-shadow);
  overflow: hidden;
}

.page-faq .faq-contact__panel::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: linear-gradient(180deg, var(--referee-red) 0 46%, var(--warn-yellow) 46% 100%);
}

.page-faq .faq-contact__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--faq-soft);
}

.page-faq .faq-contact__mail {
  margin: 8px 0 14px;
  font-family: var(--font-mono);
  font-size: clamp(18px, 3.4vw, 24px);
  line-height: 1.3;
  color: var(--warn-yellow);
  word-break: break-all;
}

.page-faq .faq-contact__copy {
  margin-bottom: 22px;
}

.page-faq .faq-contact__rows {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-faq .faq-contact__row {
  display: grid;
  gap: 3px;
  padding-top: 11px;
  border-top: 1px solid var(--rail-line);
}

.page-faq .faq-contact__row dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--faq-soft);
}

.page-faq .faq-contact__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--paper);
}

.page-faq .faq-contact__note {
  margin: 22px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--rail-line);
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--faq-soft);
}

.page-faq .faq-contact__media {
  border: 1px solid var(--hairline);
  box-shadow: var(--stack-shadow);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-faq .faq-rail__list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 16px;
  }

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

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.82fr);
    align-items: end;
    gap: 40px;
  }

  .page-faq .faq-item__q {
    padding: 17px 20px;
    font-size: 16.5px;
  }

  .page-faq .faq-item__a {
    padding-left: 54px;
    padding-right: 20px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-shell {
    grid-template-columns: 236px minmax(0, 1fr);
    gap: 46px;
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--bar-h) + 20px);
  }

  .page-faq .faq-rail__list {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__chev,
  .page-faq .faq-rail__link {
    transition: none;
  }
}