.page-faq {
  --faq-sticky-top: 152px;
  --faq-index-w: 250px;
  display: block;
  padding-bottom: 72px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: 26px 0 38px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero h1 {
  margin: 14px 0 0;
  max-width: 15em;
  font-family: var(--font-head);
  font-size: clamp(30px, 7vw, 54px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.12;
  color: var(--white);
}

.page-faq .faq-hero .lede {
  max-width: 34em;
  margin-top: 16px;
  color: var(--text);
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: 32px;
  padding-top: 36px;
}

.page-faq .faq-answers {
  min-width: 0;
}

/* ---------- 左侧问题索引 ---------- */
.page-faq .faq-index-title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-dim);
}

.page-faq .faq-index-list {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .faq-index-list > li {
  flex: 0 0 auto;
}

.page-faq .faq-index-link {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 15px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--ease), border-color var(--ease), background var(--ease), transform var(--ease);
}

.page-faq .faq-index-link .idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan-deep);
  transition: color var(--ease);
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  color: var(--white);
  border-color: var(--cyan-deep);
  background: var(--bg-raise);
  transform: translateY(-2px);
}

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

.page-faq .faq-index-link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ---------- 答案区 ---------- */
.page-faq .faq-section {
  scroll-margin-top: 130px;
}

.page-faq .faq-section + .faq-section {
  margin-top: 52px;
  padding-top: 44px;
  border-top: 1px solid var(--line);
}

.page-faq .faq-section-head {
  max-width: 44em;
  margin-bottom: 20px;
}

.page-faq .faq-section-head h2 {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-size: clamp(22px, 3.6vw, 32px);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.25;
  color: var(--white);
}

.page-faq .faq-section-head p {
  margin: 12px 0 0;
  color: var(--text);
}

.page-faq .faq-section-head a,
.page-faq .qa-body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-deep);
  transition: border-color var(--ease), color var(--ease);
}

.page-faq .faq-section-head a:hover,
.page-faq .qa-body a:hover,
.page-faq .faq-section-head a:focus-visible,
.page-faq .qa-body a:focus-visible {
  color: var(--cyan-soft);
  border-color: var(--cyan);
}

/* ---------- 图文分栏 ---------- */
.page-faq .faq-split {
  display: grid;
  gap: 28px;
}

.page-faq .faq-split-main {
  min-width: 0;
}

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

.page-faq .faq-figure--wide {
  margin-bottom: 26px;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-panel);
  background: var(--bg-raise);
}

.page-faq .faq-figure figcaption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  line-height: 1.6;
  color: var(--text-dim);
}

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

.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 19px 0;
  list-style: none;
  cursor: pointer;
  color: var(--white);
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  transition: color var(--ease);
}

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

.page-faq .qa summary:hover {
  color: var(--cyan-soft);
}

.page-faq .qa summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
  border-radius: 6px;
}

.page-faq .qa-mark {
  position: relative;
  flex: 0 0 auto;
  width: 22px;
  height: 22px;
  margin-left: auto;
  margin-top: 1px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  overflow: hidden;
  transition: border-color var(--ease), background var(--ease);
}

.page-faq .qa-mark::before,
.page-faq .qa-mark::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: var(--cyan);
  border-radius: 2px;
  transform: translate(-50%, -50%);
  transition: transform var(--ease), opacity var(--ease);
}

.page-faq .qa-mark::before {
  width: 10px;
  height: 2px;
}

.page-faq .qa-mark::after {
  width: 2px;
  height: 10px;
}

.page-faq .qa[open] .qa-mark {
  border-color: var(--cyan);
  background: rgba(53, 242, 200, 0.1);
}

.page-faq .qa[open] .qa-mark::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.page-faq .qa-body {
  padding: 0 0 22px;
  max-width: 40em;
  color: var(--text);
  font-size: 16px;
  line-height: 1.72;
}

.page-faq .qa-body p {
  margin: 0;
}

.page-faq .qa-body p + p {
  margin-top: 12px;
}

.page-faq .qa-meta {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  background: var(--bg-raise);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  line-height: 1.5;
  color: var(--text-dim);
}

/* ---------- 结尾入口 ---------- */
.page-faq .faq-cta {
  margin-top: 60px;
  padding: 30px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-panel);
  background:
    radial-gradient(120% 150% at 100% 0%, rgba(53, 242, 200, 0.1), transparent 62%),
    linear-gradient(150deg, var(--bg-raise), var(--bg));
}

.page-faq .faq-cta h2 {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(21px, 3.2vw, 30px);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.25;
  color: var(--white);
}

.page-faq .faq-cta p {
  max-width: 40em;
  margin: 12px 0 0;
  color: var(--text);
}

.page-faq .faq-cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-faq .qa-body {
    padding-left: 38px;
  }

  .page-faq .faq-cta {
    padding: 40px 34px;
  }
}

@media (min-width: 960px) {
  .page-faq {
    --faq-sticky-top: 156px;
  }

  .page-faq .faq-hero {
    padding: 40px 0 52px;
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: 68px;
    padding-top: 52px;
  }

  .page-faq .faq-index {
    position: sticky;
    top: var(--faq-sticky-top);
    align-self: start;
  }

  .page-faq .faq-index-list {
    display: block;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index-list > li + li {
    margin-top: 2px;
  }

  .page-faq .faq-index-link {
    border-color: transparent;
    border-radius: var(--radius-soft);
    white-space: normal;
    padding: 10px 14px;
  }

  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 340px);
    gap: 44px;
    align-items: start;
  }

  .page-faq .faq-section {
    scroll-margin-top: 150px;
  }

  .page-faq .faq-section + .faq-section {
    margin-top: 64px;
    padding-top: 52px;
  }

  .page-faq .faq-cta {
    margin-top: 76px;
    padding: 46px 44px;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 380px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index-link,
  .page-faq .qa-mark,
  .page-faq .qa-mark::before,
  .page-faq .qa-mark::after,
  .page-faq .qa summary {
    transition: none;
  }

  .page-faq .faq-index-link:hover,
  .page-faq .faq-index-link:focus-visible {
    transform: none;
  }
}