/* ===== 答疑中心 · page-faq ===== */

.page-faq {
  --faq-rail: 292px;
  --faq-gap: clamp(28px, 4vw, 56px);
}

.page-faq.site-main {
  padding-top: 0;
}

/* ---------- 首屏 ---------- */

.page-faq .faq-head {
  position: relative;
  padding: clamp(34px, 5.5vw, 76px) 0 clamp(44px, 6vw, 88px);
  background:
    radial-gradient(72% 92% at 84% -4%, rgba(127, 227, 208, 0.15), transparent 62%),
    radial-gradient(54% 74% at 4% 104%, rgba(255, 138, 61, 0.08), transparent 62%),
    var(--night);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-faq .faq-head::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(127, 227, 208, 0.45), transparent);
  pointer-events: none;
}

.page-faq .faq-head .shell {
  position: relative;
  z-index: 1;
}

.page-faq .faq-head .breadcrumb {
  margin: 0 0 clamp(22px, 3.4vw, 38px);
}

.page-faq .faq-head__kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--pulse);
}

.page-faq .faq-head__title {
  margin: 0;
  max-width: 18ch;
  font-size: clamp(2.1rem, 5.2vw, 4.2rem);
  line-height: 1.02;
  letter-spacing: -0.012em;
  color: var(--score);
}

.page-faq .faq-head__lede {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  max-width: 62ch;
  color: var(--moss);
}

/* ---------- 主体 ---------- */

.page-faq .faq-body {
  padding: clamp(38px, 5.5vw, 86px) 0 clamp(46px, 6.5vw, 106px);
  background: var(--turf);
}

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

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

.page-faq .faq-tabs__caption {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--haze);
}

.page-faq .faq-tabs__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 2px 2px 10px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .faq-tab {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 11px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(18, 48, 38, 0.5);
  color: var(--moss);
  font-family: var(--font-body);
  font-size: 0.92rem;
  line-height: 1.2;
  white-space: nowrap;
  cursor: pointer;
  transition:
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease);
}

.page-faq .faq-tab:hover {
  color: var(--score);
  border-color: var(--edge);
}

.page-faq .faq-tab:focus-visible {
  outline: 2px solid var(--pulse);
  outline-offset: 2px;
}

.page-faq .faq-tab[aria-selected="true"] {
  color: var(--score);
  border-color: var(--pulse);
  background: rgba(127, 227, 208, 0.13);
}

.page-faq .faq-tab__index {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--pulse);
}

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

/* ---------- 面板 ---------- */

.page-faq .faq-panel {
  min-width: 0;
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-panel[hidden] {
  display: none;
}

.page-faq .faq-panel:focus-visible {
  outline: 2px solid var(--pulse);
  outline-offset: 6px;
}

.page-faq .faq-panel__head {
  max-width: 60ch;
}

.page-faq .faq-panel__head .h-editorial {
  margin: 12px 0 0;
  color: var(--score);
}

.page-faq .faq-panel__note {
  margin: 12px 0 0;
  color: var(--moss);
  font-size: 1rem;
  line-height: 1.78;
}

.page-faq .faq-panel__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 44px);
  margin-top: clamp(24px, 3.2vw, 38px);
}

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

.page-faq .faq-panel__figure--wide {
  margin-top: clamp(26px, 3.4vw, 40px);
}

/* ---------- 问题条目 ---------- */

.page-faq .faq-list {
  min-width: 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--line);
  transition: background-color var(--dur) var(--ease);
}

.page-faq .faq-item[open] {
  background: linear-gradient(180deg, rgba(18, 48, 38, 0.62), rgba(18, 48, 38, 0));
}

.page-faq .faq-item__q {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 16px;
  align-items: center;
  gap: 12px;
  padding: 18px 10px;
  list-style: none;
  cursor: pointer;
  color: var(--score);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .faq-item__q:hover {
  color: var(--pulse);
}

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

.page-faq .faq-item__num {
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  color: var(--haze);
}

.page-faq .faq-item__text {
  font-family: var(--font-serif);
  font-size: clamp(1.02rem, 1.5vw, 1.2rem);
  font-weight: 600;
  line-height: 1.52;
  letter-spacing: 0.01em;
  overflow-wrap: break-word;
}

.page-faq .faq-item__sign {
  position: relative;
  justify-self: end;
  width: 16px;
  height: 16px;
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--pulse);
  transform: translate(-50%, -50%);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-faq .faq-item__sign::before {
  width: 13px;
  height: 1.5px;
}

.page-faq .faq-item__sign::after {
  width: 1.5px;
  height: 13px;
}

.page-faq .faq-item[open] .faq-item__sign::after {
  opacity: 0;
  transform: translate(-50%, -50%) scaleY(0.15);
}

.page-faq .faq-item__body {
  max-width: 68ch;
  padding: 0 10px 24px 56px;
  color: var(--moss);
  font-size: 1rem;
  line-height: 1.82;
}

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

.page-faq .faq-item__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  padding-bottom: 2px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--pulse);
  text-decoration: none;
  border-bottom: 1px solid rgba(127, 227, 208, 0.32);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-faq .faq-item__link:hover {
  color: var(--score);
  border-color: var(--score);
}

.page-faq .faq-item__link:focus-visible {
  outline: 2px solid var(--pulse);
  outline-offset: 3px;
}

.page-faq .faq-item__arrow {
  transition: transform var(--dur) var(--ease);
}

.page-faq .faq-item__link:hover .faq-item__arrow {
  transform: translateX(4px);
}

/* ---------- 收尾求助 ---------- */

.page-faq .faq-help {
  position: relative;
  padding: clamp(44px, 6vw, 92px) 0 clamp(54px, 7vw, 116px);
  background: linear-gradient(180deg, var(--turf), var(--night) 78%);
  border-top: 1px solid var(--line);
}

.page-faq .faq-help__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 58px);
  align-items: start;
}

.page-faq .faq-help__lead {
  max-width: 46ch;
}

.page-faq .faq-help__lead .h-editorial {
  margin: 12px 0 0;
  color: var(--score);
}

.page-faq .faq-help__lead p {
  margin: 14px 0 0;
  color: var(--moss);
  font-size: 1rem;
  line-height: 1.8;
}

.page-faq .faq-help__actions {
  margin-top: 22px;
}

.page-faq .faq-help__contact {
  min-width: 0;
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(18, 48, 38, 0.45);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.22);
}

.page-faq .faq-help__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 18px;
  padding: 13px 0;
  border-bottom: 1px dashed var(--edge);
}

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

.page-faq .faq-help__key {
  min-width: 76px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--haze);
}

.page-faq .faq-help__val {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--score);
  overflow-wrap: anywhere;
}

.page-faq .faq-help__note {
  margin: 16px 0 0;
  font-size: 0.9rem;
  line-height: 1.72;
  color: var(--moss);
}

/* ---------- 响应式 ---------- */

@media (max-width: 480px) {
  .page-faq .faq-item__q {
    grid-template-columns: 26px minmax(0, 1fr) 16px;
    gap: 10px;
    padding: 16px 6px;
  }

  .page-faq .faq-item__body {
    padding: 0 6px 22px 36px;
  }

  .page-faq .faq-tab {
    padding: 10px 14px;
    font-size: 0.88rem;
  }
}

@media (min-width: 768px) {
  .page-faq .faq-panel__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  }

  .page-faq .faq-panel__grid--single {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-tabs {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
  }

  .page-faq .faq-tabs__rail {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-faq .faq-tabs__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
    border-top: 1px solid var(--line);
  }

  .page-faq .faq-tab {
    width: 100%;
    justify-content: flex-start;
    padding: 14px 12px;
    border: 0;
    border-bottom: 1px solid var(--line);
    border-radius: 0;
    background: transparent;
  }

  .page-faq .faq-tab:hover {
    border-color: var(--line);
    background: rgba(28, 70, 54, 0.3);
  }

  .page-faq .faq-tab[aria-selected="true"] {
    border-bottom-color: var(--edge);
    background: linear-gradient(90deg, rgba(127, 227, 208, 0.12), transparent 76%);
    box-shadow: inset 2px 0 0 var(--pulse);
  }

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

@media (min-width: 1440px) {
  .page-faq {
    --faq-rail: 316px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__sign::before,
  .page-faq .faq-item__sign::after,
  .page-faq .faq-item__arrow,
  .page-faq .faq-tab {
    transition: none;
  }

  .page-faq .faq-item__link:hover .faq-item__arrow {
    transform: none;
  }
}