.page-faq {
  --faq-tint: rgba(43, 232, 201, 0.45);
  --faq-soft: rgba(14, 23, 48, 0.72);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(32px, 5vw, 72px) 0 clamp(28px, 4vw, 56px);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -220px;
  right: -160px;
  width: 560px;
  height: 560px;
  border-radius: 50%;
  background: radial-gradient(circle at center, rgba(124, 92, 255, 0.26), transparent 68%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  bottom: -180px;
  left: -140px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle at center, rgba(43, 232, 201, 0.14), transparent 70%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 52px);
}

.page-faq .faq-hero__copy .breadcrumbs {
  margin-bottom: 18px;
}

.page-faq .faq-hero__copy .display {
  margin: 8px 0 16px;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-fact {
  flex: 1 1 140px;
  padding: 14px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--faq-soft);
}

.page-faq .faq-fact strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 500;
  line-height: 1.2;
  color: var(--cyan);
}

.page-faq .faq-fact span {
  display: block;
  margin-top: 4px;
  font-size: 14px;
  color: var(--muted);
}

.page-faq .faq-hero__visual .media-frame {
  margin: 0;
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-body {
  padding-top: clamp(32px, 5vw, 64px);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3vw, 44px);
  align-items: start;
}

/* ---------- 左侧问题索引 ---------- */
.page-faq .faq-index {
  padding: 18px 18px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, rgba(14, 23, 48, 0.96), rgba(14, 23, 48, 0.55));
}

.page-faq .faq-index__title {
  margin: 0 0 14px;
  font-size: 14px;
  letter-spacing: 0.14em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-faq .faq-index__list {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-index__list li {
  flex: 0 0 auto;
}

.page-faq .faq-index__list a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  border-radius: var(--pill);
  font-size: 14px;
  line-height: 1.4;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
  background: rgba(6, 10, 24, 0.55);
  transition: border-color 0.28s var(--ease), color 0.28s var(--ease), background 0.28s var(--ease);
}

.page-faq .faq-index__list a:hover,
.page-faq .faq-index__list a:focus-visible {
  border-color: var(--faq-tint);
  color: var(--cyan);
}

.page-faq .faq-index__list .mono {
  font-size: 12px;
  color: var(--violet);
}

.page-faq .faq-index__note {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 快速定位胶囊 ---------- */
.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-faq .faq-jump__label {
  font-size: 14px;
  letter-spacing: 0.12em;
  color: var(--muted);
  margin-right: 4px;
}

.page-faq .faq-jump .chip {
  text-decoration: none;
}

/* ---------- 问答组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 128px;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(56px, 8vw, 112px);
}

.page-faq .faq-group__head {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
  padding-bottom: 14px;
}

.page-faq .faq-group__head::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), var(--violet) 42%, transparent);
  opacity: 0.55;
}

.page-faq .faq-group__no {
  font-size: 14px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-faq .faq-group__intro {
  max-width: 68ch;
  margin: 18px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

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

/* ---------- 手风琴 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--panel);
  overflow: hidden;
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-faq .faq-item[open] {
  border-color: var(--faq-tint);
  box-shadow: 0 20px 44px rgba(3, 6, 16, 0.5);
}

.page-faq .faq-item > summary {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  padding: 17px 18px;
  cursor: pointer;
  list-style: none;
  color: var(--ink);
  transition: background 0.28s var(--ease);
}

.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item > summary:hover,
.page-faq .faq-item > summary:focus-visible {
  background: rgba(43, 232, 201, 0.06);
}

.page-faq .faq-item > summary::after {
  content: "";
  width: 9px;
  height: 9px;
  margin-right: 4px;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: rotate(45deg);
  transition: transform 0.32s var(--ease), border-color 0.32s var(--ease);
}

.page-faq .faq-item[open] > summary::after {
  transform: rotate(-135deg);
  border-color: var(--cyan);
}

.page-faq .faq-item__idx {
  display: inline-flex;
  align-items: center;
  min-width: 38px;
  font-size: 14px;
  color: var(--cyan);
}

.page-faq .faq-item__q {
  font-size: 17px;
  font-weight: 500;
  line-height: 1.6;
}

.page-faq .faq-item__a {
  padding: 0 18px 20px 18px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
}

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

.page-faq .faq-item[open] .faq-item__a {
  animation: faq-answer-in 0.3s var(--ease) both;
}

@keyframes faq-answer-in {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-faq .faq-inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 232, 201, 0.42);
  transition: border-color 0.28s var(--ease), color 0.28s var(--ease);
}

.page-faq .faq-inline-link:hover,
.page-faq .faq-inline-link:focus-visible {
  color: var(--ink);
  border-color: var(--ink);
}

/* ---------- 联系与帮助 ---------- */
.page-faq .faq-help {
  margin-top: 26px;
  padding: clamp(22px, 4vw, 38px);
  border: 1px solid rgba(124, 92, 255, 0.42);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(124, 92, 255, 0.18), rgba(14, 23, 48, 0.92) 58%);
}

.page-faq .faq-help__text {
  max-width: 62ch;
  margin: 0 0 22px;
  font-size: 17px;
  line-height: 1.85;
  color: var(--ink);
}

.page-faq .faq-help .contact-list {
  margin: 0 0 20px;
}

.page-faq .faq-help .contact-item__label {
  color: var(--muted);
  font-size: 14px;
}

.page-faq .faq-help__note {
  max-width: 62ch;
  margin: 0 0 24px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-item > summary {
    padding: 19px 24px;
  }

  .page-faq .faq-item__a {
    padding: 0 24px 22px 76px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: 244px minmax(0, 1fr);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 116px;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
    gap: 8px;
  }

  .page-faq .faq-index__list li {
    flex: 1 1 auto;
  }

  .page-faq .faq-index__list a {
    white-space: normal;
    border-radius: var(--radius-sm);
    border-color: transparent;
    background: transparent;
    padding: 9px 12px;
  }

  .page-faq .faq-index__list a:hover,
  .page-faq .faq-index__list a:focus-visible {
    background: rgba(43, 232, 201, 0.08);
    border-color: rgba(43, 232, 201, 0.32);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item > summary,
  .page-faq .faq-item > summary::after,
  .page-faq .faq-inline-link,
  .page-faq .faq-index__list a {
    transition: none;
  }

  .page-faq .faq-item[open] .faq-item__a {
    animation: none;
  }
}