.page-faq {
  background: var(--ink);
  color: var(--paper);
  padding-bottom: clamp(64px, 10vw, 120px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: clamp(24px, 4vw, 44px);
}

.page-faq .faq-hero__inner {
  margin-top: clamp(24px, 4vw, 40px);
  border-left: 2px solid var(--neon);
  padding-left: clamp(16px, 3vw, 28px);
  max-width: 920px;
}

.page-faq .faq-hero__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .24em;
  color: var(--neon);
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(40px, 11vw, 104px);
  line-height: .95;
  letter-spacing: -.02em;
  color: var(--paper);
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 58ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-hero__media {
  margin: clamp(28px, 5vw, 52px) 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-2);
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(32px, 5vw, 56px);
  margin-top: clamp(44px, 7vw, 84px);
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--mist);
}

.page-faq .faq-rail__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--glass-soft);
  color: var(--mist);
  font-size: 14px;
  line-height: 1.2;
  text-decoration: none;
  transition: color .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--glow);
  border-color: var(--neon);
  background: var(--neon-soft);
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

.page-faq .faq-rail__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--neon);
}

.page-faq .faq-rail__dot {
  width: 7px;
  height: 7px;
  flex: none;
  border-radius: 50%;
  border: 1px solid var(--neon);
  background: transparent;
  transition: background .18s var(--ease);
}

.page-faq .faq-rail__link:hover .faq-rail__dot,
.page-faq .faq-rail__link:focus-visible .faq-rail__dot {
  background: var(--neon);
}

/* ---------- 问答组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--bar-h) + 24px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(44px, 7vw, 76px);
  padding-top: clamp(44px, 7vw, 76px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-group__head {
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-faq .faq-group__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .2em;
  color: var(--neon);
}

.page-faq .faq-group__title {
  margin: 10px 0 0;
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(24px, 3.6vw, 38px);
  line-height: 1.25;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-faq .faq-group__intro {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--line);
}

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

.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 2px;
  list-style: none;
  cursor: pointer;
  color: var(--paper);
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.6;
  transition: color .18s 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 {
  color: var(--neon);
}

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 4px;
  border-radius: var(--radius-sm);
}

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

.page-faq .faq-chev {
  flex: none;
  width: 11px;
  height: 11px;
  margin-top: 8px;
  margin-left: auto;
  border-right: 2px solid var(--neon);
  border-bottom: 2px solid var(--neon);
  transform: rotate(45deg);
  transition: transform .25s var(--ease);
}

.page-faq .faq-item[open] .faq-chev {
  transform: rotate(-135deg);
}

.page-faq .faq-a {
  padding: 0 2px 22px;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-a p {
  margin: 0 0 12px;
}

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

.page-faq .faq-link {
  color: var(--neon);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

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

/* ---------- 视图对照 ---------- */
.page-faq .faq-figure {
  margin: 0 0 clamp(20px, 3vw, 32px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-2);
}

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

.page-faq .faq-figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-compare {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-bottom: clamp(22px, 3.4vw, 36px);
}

.page-faq .faq-compare__card {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--glass-soft);
}

.page-faq .faq-compare__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--neon);
}

.page-faq .faq-compare__list {
  margin: 0;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-cta {
  margin-top: clamp(48px, 8vw, 92px);
  padding: clamp(26px, 4vw, 46px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--ink-2);
}

.page-faq .faq-cta__title {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(21px, 2.8vw, 30px);
  line-height: 1.35;
  color: var(--paper);
}

.page-faq .faq-cta__text {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-compare {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (min-width: 980px) {
  .page-faq .faq-body {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: clamp(48px, 6vw, 96px);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--bar-h) + 32px);
    align-self: start;
  }

  .page-faq .faq-rail__list {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
    border-left: 1px solid var(--line);
  }

  .page-faq .faq-rail__link {
    border: 0;
    border-radius: 0;
    background: transparent;
    padding: 11px 0 11px 16px;
    align-items: baseline;
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    background: var(--neon-soft);
    outline-offset: -2px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-rail__link,
  .page-faq .faq-rail__dot,
  .page-faq .faq-item summary,
  .page-faq .faq-chev {
    transition: none;
  }
}