.page-faq {
  --faq-glass: rgba(20, 28, 74, 0.55);
  --faq-glass-strong: rgba(20, 28, 74, 0.9);
  --faq-ring: rgba(37, 232, 212, 0.22);
  position: relative;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-top: 34px;
  padding-bottom: 12px;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: -90px 0 auto 0;
  height: 620px;
  background:
    radial-gradient(48% 62% at 16% 22%, rgba(37, 232, 212, 0.15), transparent 68%),
    radial-gradient(46% 58% at 84% 4%, rgba(139, 92, 246, 0.24), transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 34px;
}

.page-faq .breadcrumb {
  margin-bottom: 16px;
  font-size: 13px;
}

.page-faq .faq-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5.6vw, 54px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--white);
  margin: 10px 0 16px;
}

.page-faq .faq-hero__lede {
  max-width: 34em;
  color: var(--muted);
}

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

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

/* 图片容器（页内局部补全） */
.page-faq .media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  border-radius: var(--radius-l);
  border: 1px solid var(--line);
  background: var(--ink-800);
}

.page-faq .media-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-faq .media-frame--wide {
  aspect-ratio: 21 / 9;
}

/* ---------- 场景导览条 ---------- */
.page-faq .faq-nav-wrap {
  margin-top: 30px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(20, 28, 74, 0.5), rgba(7, 10, 26, 0.15));
}

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

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

.page-faq .faq-nav__item {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: rgba(7, 10, 26, 0.62);
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-faq .faq-nav__item .mono {
  font-size: 12px;
  color: var(--cyan);
  opacity: 0.75;
}

.page-faq .faq-nav__item:hover,
.page-faq .faq-nav__item:focus-visible {
  border-color: var(--cyan-line);
  color: var(--white);
  background: var(--cyan-soft);
}

.page-faq .faq-nav__item.is-current {
  border-color: var(--cyan);
  color: var(--ink-950);
  background: var(--cyan);
}

.page-faq .faq-nav__item.is-current .mono {
  color: var(--ink-950);
  opacity: 0.8;
}

/* ---------- 内容外壳 ---------- */
.page-faq .faq-shell {
  position: relative;
  padding-top: 34px;
  padding-bottom: 76px;
}

.page-faq .faq-all__input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: 0;
  opacity: 0;
  pointer-events: none;
}

.page-faq .faq-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 22px;
}

.page-faq .faq-toolbar__meta {
  margin: 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted-dim);
}

.page-faq .faq-all__label {
  cursor: pointer;
  user-select: none;
}

.page-faq .faq-all__label .is-off {
  display: none;
}

.page-faq .faq-all__input:checked ~ .faq-toolbar .faq-all__label .is-on {
  display: none;
}

.page-faq .faq-all__input:checked ~ .faq-toolbar .faq-all__label .is-off {
  display: inline;
}

.page-faq .faq-all__input:focus-visible ~ .faq-toolbar .faq-all__label {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .faq-all__input:checked ~ .faq-stack .qa__body {
  display: block;
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 96px;
  padding: 34px 0 10px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-group:first-child {
  border-top: 0;
  padding-top: 4px;
}

.page-faq .faq-group__num {
  display: block;
  font-size: 40px;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--cyan);
  opacity: 0.42;
  margin-bottom: 10px;
}

.page-faq .faq-group__title {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--white);
  margin: 0 0 8px;
}

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

/* ---------- 问答折叠 ---------- */
.page-faq .qa {
  margin-bottom: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--faq-glass);
  backdrop-filter: blur(10px);
  overflow: hidden;
  transition: border-color 0.22s var(--ease), background 0.22s var(--ease);
}

.page-faq .qa[open] {
  border-color: var(--faq-ring);
  background: var(--faq-glass-strong);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--white);
}

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

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

.page-faq .qa__q-text {
  flex: 1 1 auto;
}

.page-faq .qa__arrow {
  position: relative;
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  margin-left: auto;
  border-radius: 50%;
  border: 1px solid var(--cyan-line);
  transition: background 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-faq .qa__arrow::before,
.page-faq .qa__arrow::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--cyan);
  transform: translate(-50%, -50%);
  transition: transform 0.22s var(--ease), opacity 0.22s var(--ease);
}

.page-faq .qa__arrow::before {
  width: 10px;
  height: 1.5px;
}

.page-faq .qa__arrow::after {
  width: 1.5px;
  height: 10px;
}

.page-faq .qa[open] .qa__arrow {
  background: var(--cyan-soft);
  border-color: var(--cyan);
}

.page-faq .qa[open] .qa__arrow::after {
  transform: translate(-50%, -50%) rotate(90deg);
  opacity: 0;
}

.page-faq .qa__body {
  padding: 0 18px 18px;
}

.page-faq .qa__body p {
  max-width: 40em;
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .qa__body > *:last-child {
  margin-bottom: 0;
}

.page-faq .qa__body .tag {
  vertical-align: middle;
}

.page-faq .qa__body a:not(.link-cyan) {
  color: var(--white);
  text-decoration: underline;
  text-decoration-color: var(--cyan-line);
  text-underline-offset: 3px;
}

.page-faq .qa__body a:not(.link-cyan):hover {
  color: var(--cyan);
}

/* ---------- 步骤序列 ---------- */
.page-faq .steps {
  list-style: none;
  counter-reset: faqstep;
  margin: 0 0 12px;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-faq .steps > li {
  position: relative;
  counter-increment: faqstep;
  padding-left: 30px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--muted);
}

.page-faq .steps > li::before {
  content: counter(faqstep);
  position: absolute;
  left: 0;
  top: 3px;
  width: 20px;
  height: 20px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--cyan-line);
  background: rgba(37, 232, 212, 0.07);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}

/* ---------- 小屏专项配图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 22px;
}

.page-faq .faq-figure--4x3 {
  aspect-ratio: 4 / 3;
}

/* ---------- 收尾面板 ---------- */
.page-faq .faq-group--help {
  padding-bottom: 6px;
}

.page-faq .faq-panel {
  padding: 22px;
  border-radius: var(--radius-l);
  border: 1px solid var(--line-strong);
  background: linear-gradient(158deg, rgba(36, 26, 94, 0.58), rgba(20, 28, 74, 0.82));
  box-shadow: var(--shadow-card);
}

.page-faq .faq-panel__title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 800;
  line-height: 1.5;
  color: var(--white);
  margin: 0 0 16px;
}

.page-faq .faq-checklist {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .faq-checklist > li {
  position: relative;
  padding-left: 28px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-checklist > li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 12px;
  height: 12px;
  border-radius: 3px;
  border: 1px solid var(--cyan-line);
  background: var(--cyan-soft);
}

.page-faq .faq-contact {
  display: grid;
  gap: 7px;
  margin-bottom: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-contact a {
  color: var(--white);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-line);
}

.page-faq .faq-contact a:hover {
  color: var(--cyan);
}

.page-faq .faq-contact .mono {
  color: var(--cyan);
}

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

/* ---------- 页脚小注 ---------- */
.page-faq .faq-footnote {
  margin-top: 46px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-footnote p {
  max-width: 44em;
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted-dim);
}

.page-faq .faq-footnote a {
  color: var(--white);
  text-decoration: underline;
  text-decoration-color: var(--cyan-line);
  text-underline-offset: 3px;
}

.page-faq .faq-footnote a:hover {
  color: var(--cyan);
}

/* ---------- 断点 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: center;
    gap: 48px;
  }

  .page-faq .faq-hero__title {
    max-width: 14em;
  }
}

@media (min-width: 920px) {
  .page-faq .faq-group {
    display: grid;
    grid-template-columns: 180px minmax(0, 1fr);
    column-gap: 42px;
    padding: 42px 0 14px;
  }

  .page-faq .faq-group__aside {
    position: sticky;
    top: 104px;
    align-self: start;
  }

  .page-faq .faq-group__num {
    font-size: 54px;
  }

  .page-faq .faq-group__note {
    max-width: 15em;
  }

  .page-faq .faq-group__list {
    padding-right: 12%;
  }
}

@media (max-width: 640px) {
  .page-faq .faq-hero {
    padding-top: 22px;
  }

  .page-faq .faq-hero__title {
    font-size: clamp(27px, 8vw, 34px);
  }

  .page-faq .faq-shell {
    padding-bottom: 56px;
  }

  .page-faq .qa__q {
    padding: 14px 15px;
    font-size: 15px;
  }

  .page-faq .qa__body {
    padding: 0 15px 16px;
  }

  .page-faq .faq-panel {
    padding: 18px;
  }

  .page-faq .faq-panel__actions .btn {
    width: 100%;
    justify-content: center;
  }
}

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