.page-faq {
  --faq-rail: 3.6rem;
  background: var(--ng-ink);
  color: var(--ng-text);
}

/* ---------- 页眉 ---------- */
.page-faq .faq-head {
  position: relative;
  overflow: hidden;
  padding-block: clamp(22px, 4vw, 44px) clamp(30px, 6vw, 68px);
}

.page-faq .faq-head::after {
  content: "";
  position: absolute;
  right: -14%;
  bottom: -46%;
  width: clamp(220px, 42vw, 540px);
  height: clamp(220px, 42vw, 540px);
  background: radial-gradient(circle at 58% 42%, rgba(34, 224, 200, 0.16), rgba(123, 92, 255, 0.08) 46%, transparent 68%);
  pointer-events: none;
}

.page-faq .faq-head__grid {
  position: relative;
  display: grid;
  gap: clamp(22px, 4vw, 40px);
  margin-top: clamp(18px, 3vw, 30px);
}

.page-faq .faq-head__no {
  margin: 0 0 14px;
  color: var(--ng-violet);
  letter-spacing: 0.24em;
}

.page-faq .faq-head__title {
  margin: 0 0 16px;
  font-family: var(--ng-font-display);
  font-weight: 800;
  font-size: clamp(1.85rem, 5.6vw, 3.25rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  max-width: 20ch;
}

.page-faq .faq-head__lede {
  margin: 0;
  max-width: 46ch;
  color: var(--ng-muted);
}

.page-faq .faq-head__index {
  position: relative;
  background: var(--ng-slab);
  border: 1px solid var(--ng-line);
  padding: 18px 20px 20px;
}

.page-faq .faq-head__index::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 38%;
  height: 2px;
  background: linear-gradient(90deg, var(--ng-teal), var(--ng-violet));
}

.page-faq .faq-head__index-label {
  margin: 0;
  color: var(--ng-muted);
}

.page-faq .faq-head__index ul {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
}

.page-faq .faq-head__index a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 9px 0;
  color: var(--ng-text);
  font-size: 0.96rem;
  text-decoration: none;
  border-bottom: 1px solid var(--ng-line);
  transition: color var(--ng-t) var(--ng-ease), padding-left var(--ng-t) var(--ng-ease);
}

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

.page-faq .faq-head__index a:hover {
  color: var(--ng-teal);
  padding-left: 5px;
}

.page-faq .faq-head__index a:focus-visible {
  outline: 2px solid var(--ng-teal);
  outline-offset: 3px;
}

.page-faq .faq-head__index-no {
  color: var(--ng-teal);
  font-size: 0.82rem;
}

/* ---------- 新手三步 ---------- */
.page-faq .faq-steps,
.page-faq .faq-questions,
.page-faq .faq-support {
  border-top: 1px solid var(--ng-line);
  padding-block: clamp(36px, 7vw, 84px);
}

.page-faq .faq-steps__inner {
  display: grid;
  gap: clamp(26px, 5vw, 52px);
}

.page-faq .faq-steps__index,
.page-faq .faq-questions__index,
.page-faq .faq-support__index {
  margin: 0;
  color: var(--ng-green);
  letter-spacing: 0.24em;
}

.page-faq .faq-steps__heading,
.page-faq .faq-questions__heading,
.page-faq .faq-support__heading {
  margin: 10px 0 0;
  font-family: var(--ng-font-display);
  font-weight: 800;
  font-size: clamp(1.4rem, 3.4vw, 2rem);
  line-height: 1.16;
  letter-spacing: -0.015em;
}

.page-faq .faq-steps__note,
.page-faq .faq-questions__note,
.page-faq .faq-support__text {
  margin: 12px 0 0;
  color: var(--ng-muted);
  line-height: 1.75;
  max-width: 44ch;
}

.page-faq .faq-steps__list {
  list-style: none;
  margin: clamp(18px, 3vw, 28px) 0 0;
  padding: 0;
}

.page-faq .faq-steps__item {
  display: grid;
  grid-template-columns: var(--faq-rail) minmax(0, 1fr);
  gap: 2px 18px;
  padding: 22px 0;
  border-bottom: 1px dashed var(--ng-line);
}

.page-faq .faq-steps__item:first-child {
  border-top: 1px dashed var(--ng-line);
}

.page-faq .faq-steps__no {
  grid-row: span 2;
  padding-top: 4px;
  color: var(--ng-green);
  font-size: clamp(1.25rem, 2.4vw, 1.65rem);
  line-height: 1;
}

.page-faq .faq-steps__title {
  margin: 0;
  font-size: 1.04rem;
  font-weight: 700;
  line-height: 1.42;
  letter-spacing: -0.01em;
}

.page-faq .faq-steps__text {
  margin: 6px 0 0;
  color: var(--ng-muted);
  font-size: 0.97rem;
  line-height: 1.72;
}

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

/* ---------- 常见问题 ---------- */
.page-faq .faq-questions__head {
  margin-bottom: clamp(20px, 4vw, 34px);
}

.page-faq .ng-tabs__list {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  padding-bottom: 10px;
  margin-bottom: clamp(16px, 3vw, 26px);
  border-bottom: 1px solid var(--ng-line);
  scrollbar-width: thin;
}

.page-faq .ng-tabs__btn {
  flex: none;
  appearance: none;
  border: 1px solid transparent;
  background: transparent;
  color: var(--ng-muted);
  font: inherit;
  font-size: 0.94rem;
  padding: 9px 16px;
  cursor: pointer;
  transition: color var(--ng-t) var(--ng-ease), background-color var(--ng-t) var(--ng-ease), border-color var(--ng-t) var(--ng-ease);
}

.page-faq .ng-tabs__btn:hover {
  color: var(--ng-text);
}

.page-faq .ng-tabs__btn[aria-selected="true"] {
  color: var(--ng-ink);
  background: var(--ng-teal);
  border-color: var(--ng-teal);
  font-weight: 700;
}

.page-faq .ng-tabs__btn:focus-visible {
  outline: 2px solid var(--ng-teal);
  outline-offset: 2px;
}

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

.page-faq .ng-tabs__panel:focus-visible {
  outline: 2px solid var(--ng-line);
  outline-offset: 4px;
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--ng-line);
}

.page-faq .faq-item:first-child {
  border-top: 1px solid var(--ng-line);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  padding: clamp(16px, 2.4vw, 22px) 0;
  cursor: pointer;
  list-style: none;
  color: var(--ng-text);
  font-weight: 700;
  font-size: 1.02rem;
  line-height: 1.5;
  letter-spacing: -0.01em;
  transition: color var(--ng-t) var(--ng-ease);
}

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

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

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

.page-faq .faq-item__q::after {
  content: "";
  flex: none;
  margin-left: auto;
  margin-top: 6px;
  width: 10px;
  height: 10px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  transition: transform var(--ng-t) var(--ng-ease);
}

.page-faq .faq-item[open] > .faq-item__q::after {
  transform: rotate(225deg);
}

.page-faq .faq-item__a {
  padding: 0 0 clamp(18px, 2.6vw, 24px);
  color: var(--ng-muted);
}

.page-faq .faq-item__a p {
  margin: 0;
  line-height: 1.78;
  max-width: 62ch;
}

.page-faq .faq-item__a p + p {
  margin-top: 10px;
}

/* ---------- 联系与响应 ---------- */
.page-faq .faq-support__inner {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

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

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

.page-faq .faq-support__facts {
  margin: 22px 0 26px;
}

.page-faq .faq-support__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 回到顶部 ---------- */
.page-faq .faq-totop {
  position: fixed;
  right: clamp(12px, 3vw, 28px);
  bottom: clamp(12px, 3vw, 28px);
  z-index: 20;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 14px;
  font-family: var(--ng-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--ng-text);
  background: rgba(20, 28, 43, 0.94);
  border: 1px solid var(--ng-line);
  text-decoration: none;
  transition: color var(--ng-t) var(--ng-ease), border-color var(--ng-t) var(--ng-ease);
}

.page-faq .faq-totop:hover {
  color: var(--ng-teal);
  border-color: var(--ng-teal);
}

.page-faq .faq-totop:focus-visible {
  outline: 2px solid var(--ng-teal);
  outline-offset: 2px;
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-head__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(240px, 0.78fr);
    align-items: end;
  }

  .page-faq .faq-steps__inner {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 0.72fr);
    align-items: start;
  }

  .page-faq .faq-steps__media {
    position: sticky;
    top: 104px;
  }

  .page-faq .faq-item__a {
    padding-left: min(34%, 260px);
  }

  .page-faq .faq-support__inner {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    align-items: start;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-steps__item {
    padding: 26px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__q,
  .page-faq .faq-item__q::after,
  .page-faq .ng-tabs__btn,
  .page-faq .faq-head__index a,
  .page-faq .faq-totop {
    transition: none;
  }
}