/* ===== 页面作用域：常见问答 ===== */
.page-faq {
  background: var(--night);
  color: var(--paper);
}

/* ---- 首屏 ---- */
.page-faq .faq-hero {
  position: relative;
  padding: 22px 0 44px;
  border-bottom: 1px solid rgba(244, 241, 232, 0.12);
  background:
    radial-gradient(880px 420px at 84% -12%, rgba(255, 106, 19, 0.22), transparent 62%),
    radial-gradient(720px 380px at 4% 112%, rgba(14, 59, 54, 0.72), transparent 60%),
    var(--night);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(244, 241, 232, 0.05) 1px, transparent 1px);
  background-size: 4px 4px;
}

.page-faq .faq-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  align-items: end;
  margin-top: 26px;
}

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

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-size: var(--h1);
  font-weight: 900;
  letter-spacing: -0.035em;
  line-height: 1.08;
  margin: 14px 0 18px;
  max-width: 14ch;
  color: var(--paper);
}

.page-faq .faq-hero__lede {
  max-width: 60ch;
  margin: 0;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: rgba(244, 241, 232, 0.82);
}

.page-faq .faq-hero__aside {
  display: grid;
  gap: 16px;
  padding-top: 20px;
  border-top: 1px solid rgba(244, 241, 232, 0.18);
  min-width: 0;
}

.page-faq .faq-stat {
  display: grid;
  gap: 4px;
  padding-left: 14px;
  border-left: 2px solid var(--amber);
}

.page-faq .faq-stat__k {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-stat__v {
  font-size: 0.9375rem;
  line-height: 1.62;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-jump .chip {
  padding: 7px 14px;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.02em;
  text-decoration: none;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.page-faq .faq-jump .chip:hover,
.page-faq .faq-jump .chip:focus-visible {
  color: var(--orange);
  border-color: var(--orange);
}

/* ---- 主体浅色区 ---- */
.page-faq .faq-body {
  background: var(--paper);
  color: var(--ink);
  border-top: 2px solid var(--orange);
  padding: 44px 0 62px;
}

.page-faq .faq-band {
  margin: 0 0 40px;
}

.page-faq .faq-band .media__frame {
  border: 1px solid rgba(16, 20, 24, 0.18);
  box-shadow: 5px 5px 0 rgba(16, 20, 24, 0.1);
}

.page-faq .faq-cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: start;
}

.page-faq .faq-col-main,
.page-faq .faq-col-side {
  min-width: 0;
}

.page-faq .faq-col-side {
  display: grid;
  gap: 20px;
}

/* ---- 分组 ---- */
.page-faq .faq-group {
  margin: 0 0 46px;
  scroll-margin-top: 96px;
}

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

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 14px;
  align-items: baseline;
  margin: 0 0 20px;
  padding-top: 14px;
  border-top: 2px solid var(--ink);
}

.page-faq .faq-group__head .idx {
  grid-row: span 2;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--wine);
}

.page-faq .faq-group__head h2 {
  font-family: var(--font-display);
  font-size: var(--h2);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.22;
  margin: 0;
  color: var(--ink);
}

.page-faq .faq-group__note {
  grid-column: 2;
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: #4b5560;
}

/* ---- 问答折叠条目 ---- */
.page-faq .qa {
  background: #ffffff;
  border: 1px solid rgba(16, 20, 24, 0.16);
  border-left: 3px solid rgba(16, 20, 24, 0.16);
  box-shadow: 2px 2px 0 rgba(16, 20, 24, 0.06);
  margin: 0 0 12px;
  transition: border-color var(--t-base) var(--ease), box-shadow var(--t-base) var(--ease);
}

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

.page-faq .qa:hover {
  border-left-color: var(--orange);
  box-shadow: 3px 3px 0 rgba(255, 106, 19, 0.16);
}

.page-faq .qa[open] {
  border-left-color: var(--orange);
  box-shadow: 3px 3px 0 rgba(255, 106, 19, 0.28);
}

.page-faq .qa__q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
  transition: color var(--t-fast) var(--ease);
}

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

.page-faq .qa__q:hover {
  color: #b8460a;
}

.page-faq .qa__q::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.125rem;
  line-height: 1;
  color: var(--orange);
}

.page-faq .qa[open] .qa__q::after {
  content: "−";
  color: var(--wine);
}

.page-faq .qa__marker {
  flex: none;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: var(--wine);
}

.page-faq .qa__a {
  padding: 14px 20px 20px;
  border-top: 1px dashed rgba(16, 20, 24, 0.16);
  font-size: 0.9375rem;
  line-height: 1.78;
  color: #3b444e;
}

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

/* ---- 侧栏面板 ---- */
.page-faq .faq-panel {
  background: var(--night);
  color: var(--paper);
  border: 1px solid rgba(11, 30, 58, 0.9);
  border-top: 3px solid var(--amber);
  box-shadow: 6px 6px 0 rgba(11, 30, 58, 0.16);
  padding: 22px 22px 24px;
}

.page-faq .faq-panel--archive {
  background: var(--archive);
  border-color: rgba(14, 59, 54, 0.9);
  border-top-color: var(--lime);
}

.page-faq .faq-panel__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-faq .faq-panel--archive .faq-panel__title {
  color: var(--lime);
}

.page-faq .faq-panel p {
  margin: 0 0 12px;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(244, 241, 232, 0.85);
}

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

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

.page-faq .faq-rows li {
  display: grid;
  gap: 3px;
  padding-bottom: 12px;
  border-bottom: 1px dashed rgba(244, 241, 232, 0.22);
}

.page-faq .faq-rows li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-k {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-v {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.page-faq .faq-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 4px;
}

.page-faq .faq-links a {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid rgba(244, 241, 232, 0.16);
  color: var(--paper);
  font-size: 0.9375rem;
  text-decoration: none;
  transition: color var(--t-fast) var(--ease), padding-left var(--t-fast) var(--ease);
}

.page-faq .faq-links a::after {
  content: "→";
  font-family: var(--font-mono);
  color: var(--orange);
}

.page-faq .faq-links li:last-child a {
  border-bottom: 0;
}

.page-faq .faq-links a:hover,
.page-faq .faq-links a:focus-visible {
  color: var(--lime);
  padding-left: 6px;
}

/* ---- 尾部 ---- */
.page-faq .faq-tail {
  background: var(--indigo);
  border-top: 1px solid rgba(244, 241, 232, 0.14);
  padding: 42px 0 52px;
}

.page-faq .faq-tail__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: center;
}

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

.page-faq .faq-tail h2 {
  font-family: var(--font-display);
  font-size: var(--h2);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.22;
  margin: 12px 0 10px;
  color: var(--paper);
}

.page-faq .faq-tail p {
  margin: 0;
  max-width: 56ch;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: rgba(244, 241, 232, 0.82);
}

.page-faq .faq-tail__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---- 响应式 ---- */
@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 40px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-cols {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 44px;
  }

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

@media (min-width: 860px) {
  .page-faq .faq-tail__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 40px;
  }

  .page-faq .faq-tail__actions {
    justify-self: end;
  }
}

@media (max-width: 640px) {
  .page-faq .faq-hero {
    padding: 18px 0 34px;
  }

  .page-faq .faq-hero h1 {
    max-width: none;
  }

  .page-faq .faq-body {
    padding: 32px 0 48px;
  }

  .page-faq .qa__q {
    font-size: 0.9375rem;
    padding: 14px;
  }

  .page-faq .qa__a {
    padding: 12px 14px 16px;
  }

  .page-faq .faq-panel {
    padding: 18px;
    box-shadow: 4px 4px 0 rgba(11, 30, 58, 0.16);
  }

  .page-faq .faq-v,
  .page-faq .faq-links a {
    font-size: 0.875rem;
  }

  .page-faq .faq-tail {
    padding: 34px 0 42px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__q,
  .page-faq .faq-jump .chip,
  .page-faq .faq-links a {
    transition: none;
  }
}