.page-faq {
  --faq-rail-w: 236px;
  --faq-gap: clamp(22px, 3vw, 44px);
  --faq-quiet: rgba(155, 161, 180, 0.6);
  padding-bottom: clamp(40px, 7vw, 96px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: clamp(22px, 5vw, 56px) 0 clamp(26px, 4vw, 48px);
  background:
    radial-gradient(120% 80% at 88% 0%, rgba(139, 92, 246, 0.22), transparent 62%),
    radial-gradient(80% 60% at 4% 12%, rgba(56, 189, 248, 0.12), transparent 60%);
}

.page-faq .hero-grid {
  display: grid;
  gap: clamp(22px, 4vw, 42px);
  align-items: end;
  margin-top: clamp(16px, 3vw, 30px);
}

.page-faq .hero-eyebrow {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--blue);
}

.page-faq .faq-hero h1 {
  margin: 0 0 18px;
  font-size: clamp(30px, 6.2vw, 58px);
  line-height: 1.12;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--text);
  max-width: 22ch;
}

.page-faq .hero-copy .lede {
  max-width: 60ch;
  color: var(--text-dim);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.9;
}

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

.page-faq .faq-hero-figure {
  margin: 0;
}

.page-faq .faq-hero-figure .figure-frame {
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  overflow: hidden;
  background: var(--ink-050);
  box-shadow: var(--glow-violet);
}

.page-faq .faq-hero-figure img,
.page-faq .faq-support-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  opacity: 0.92;
}

.page-faq .figure-cap {
  margin-top: 10px;
  font-size: 12.5px;
  color: var(--text-dim);
}

/* ---------- 主题速览 ---------- */
.page-faq .faq-topics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(158px, 1fr));
  gap: 12px;
  margin-top: clamp(26px, 4vw, 46px);
}

.page-faq .topic-card {
  position: relative;
  display: grid;
  gap: 6px;
  padding: 16px 16px 18px;
  border-radius: var(--radius);
  border: 1px solid var(--line-soft);
  border-top: 2px solid rgba(139, 92, 246, 0.65);
  background: linear-gradient(160deg, rgba(27, 31, 43, 0.9), rgba(8, 10, 16, 0.85));
  text-decoration: none;
  transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.page-faq .topic-card:hover,
.page-faq .topic-card:focus-visible {
  border-color: var(--blue);
  transform: translateY(-2px);
  box-shadow: 0 18px 34px -26px rgba(56, 189, 248, 0.9);
}

.page-faq .topic-num {
  font-size: 12px;
  color: var(--violet-soft);
  letter-spacing: 0.12em;
}

.page-faq .topic-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
}

.page-faq .topic-count {
  font-size: 12px;
  color: var(--text-dim);
}

/* ---------- 正文骨架 ---------- */
.page-faq .faq-body {
  display: grid;
  gap: var(--faq-gap);
  padding-top: clamp(28px, 4vw, 52px);
}

.page-faq .faq-rail {
  border-left: 1px solid rgba(139, 92, 246, 0.35);
  padding-left: 16px;
}

.page-faq .rail-title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--text-dim);
}

.page-faq .rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 4px;
}

.page-faq .rail-link {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-dim);
  text-decoration: none;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.page-faq .rail-dot {
  width: 6px;
  height: 6px;
  flex: 0 0 6px;
  border-radius: 50%;
  background: var(--ink-200);
  transition: background-color 0.2s ease, box-shadow 0.2s ease;
}

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

.page-faq .rail-link[aria-current="true"] {
  color: var(--white);
  background: rgba(139, 92, 246, 0.16);
}

.page-faq .rail-link[aria-current="true"] .rail-dot {
  background: var(--violet);
  box-shadow: 0 0 0 4px rgba(139, 92, 246, 0.22), 0 0 14px rgba(139, 92, 246, 0.9);
}

.page-faq .rail-foot {
  margin: 18px 0 0;
  font-size: 12px;
  line-height: 1.8;
  color: var(--faq-quiet);
}

/* ---------- 章节 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: clamp(34px, 5vw, 64px);
  min-width: 0;
}

.page-faq .faq-section {
  min-width: 0;
  scroll-margin-top: 96px;
}

.page-faq .section-head {
  border-left: 3px solid var(--violet);
  padding-left: 14px;
  margin-bottom: 18px;
}

.page-faq .section-index {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--violet-soft);
}

.page-faq .faq-section h2,
.page-faq .faq-cta h2 {
  margin: 0 0 8px;
  font-size: clamp(22px, 3.4vw, 32px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-faq .section-note {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--text-dim);
  max-width: 56ch;
}

/* ---------- 问答折叠 ---------- */
.page-faq .qa {
  border: 1px solid var(--line-soft);
  border-top: 2px solid rgba(139, 92, 246, 0.45);
  border-radius: var(--radius);
  background: var(--bg-card);
  margin-bottom: 10px;
  overflow: hidden;
  transition: border-color 0.25s ease, background-color 0.25s ease;
}

.page-faq .qa[open] {
  border-color: rgba(139, 92, 246, 0.55);
  background: linear-gradient(180deg, rgba(27, 31, 43, 0.95), rgba(15, 18, 25, 0.95));
}

.page-faq .qa-q {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa-num {
  font-size: 12px;
  line-height: 1.9;
  color: var(--violet-soft);
  letter-spacing: 0.06em;
}

.page-faq .qa-text {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.65;
  color: var(--white);
}

.page-faq .qa-q:hover .qa-text {
  color: var(--violet-soft);
}

.page-faq .qa-sign {
  position: relative;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  flex: 0 0 auto;
}

.page-faq .qa-sign::before,
.page-faq .qa-sign::after {
  content: "";
  position: absolute;
  background: var(--blue);
  border-radius: 2px;
  transition: transform 0.24s ease, opacity 0.24s ease;
}

.page-faq .qa-sign::before {
  left: 0;
  top: 8px;
  width: 18px;
  height: 2px;
}

.page-faq .qa-sign::after {
  top: 0;
  left: 8px;
  width: 2px;
  height: 18px;
}

.page-faq .qa[open] .qa-sign::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .qa-a {
  padding: 4px 16px 20px 44px;
  border-top: 1px dashed rgba(155, 161, 180, 0.22);
  margin-top: 2px;
  padding-top: 16px;
}

.page-faq .qa-lead {
  position: relative;
  margin: 0 0 12px;
  padding-left: 14px;
  border-left: 3px solid var(--gold);
  font-size: 15.5px;
  line-height: 1.85;
  font-weight: 700;
  color: var(--white);
}

.page-faq .qa-body {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-dim);
  max-width: 62ch;
}

.page-faq .qa-steps,
.page-faq .qa-list {
  margin: 0 0 10px;
  padding-left: 20px;
  display: grid;
  gap: 7px;
  max-width: 62ch;
}

.page-faq .qa-steps li,
.page-faq .qa-list li {
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-dim);
}

.page-faq .qa-steps li::marker {
  color: var(--blue);
  font-family: var(--font-mono);
}

.page-faq .qa-list li::marker {
  color: var(--violet);
}

.page-faq .qa-link {
  margin: 12px 0 0;
  font-size: 14px;
  color: var(--text-dim);
}

.page-faq .qa-a a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(56, 189, 248, 0.4);
  padding-bottom: 1px;
}

.page-faq .qa-a a:hover,
.page-faq .qa-a a:focus-visible {
  color: var(--violet-soft);
  border-bottom-color: var(--violet-soft);
}

/* ---------- 客服图示 ---------- */
.page-faq .faq-support-figure {
  margin: 0 0 18px;
}

.page-faq .faq-support-figure .figure-frame {
  border-radius: var(--radius);
  border: 1px solid var(--line-soft);
  overflow: hidden;
  background: var(--ink-050);
}

/* ---------- 收尾 CTA ---------- */
.page-faq .faq-cta {
  scroll-margin-top: 96px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  padding: clamp(22px, 4vw, 40px);
  background:
    radial-gradient(110% 130% at 100% 0%, rgba(255, 77, 157, 0.16), transparent 58%),
    linear-gradient(165deg, rgba(27, 31, 43, 0.95), rgba(5, 6, 10, 0.95));
}

.page-faq .faq-cta .section-index {
  color: var(--pink);
}

.page-faq .faq-cta .lede {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-dim);
}

.page-faq .cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 24px 0 16px;
}

.page-faq .cta-line {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.8;
  color: var(--gold);
  word-break: break-word;
}

/* ---------- 展开动效 ---------- */
.page-faq .qa[open] .qa-a {
  animation: faq-open 0.28s ease-out both;
}

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

/* ---------- 平板与桌面 ---------- */
@media (min-width: 760px) {
  .page-faq .hero-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }

  .page-faq .faq-hero h1 {
    font-size: clamp(38px, 4.6vw, 58px);
  }

  .page-faq .qa-a {
    padding-left: 60px;
    padding-right: 28px;
  }

  .page-faq .qa-q {
    padding: 18px 22px;
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 104px;
    max-height: calc(100vh - 140px);
    overflow-y: auto;
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-topics {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (max-width: 420px) {
  .page-faq .qa-q {
    grid-template-columns: auto minmax(0, 1fr) 16px;
    gap: 9px;
    padding: 14px 13px;
  }

  .page-faq .qa-a {
    padding-left: 13px;
    padding-right: 13px;
  }

  .page-faq .qa-text {
    font-size: 15px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .topic-card,
  .page-faq .qa-sign::before,
  .page-faq .qa-sign::after,
  .page-faq .rail-link {
    transition: none;
  }

  .page-faq .qa[open] .qa-a {
    animation: none;
  }
}