.page-faq {
  --faq-pad: 20px;
  display: block;
  padding-bottom: 80px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding: 18px 0 40px;
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: 32px;
  margin-top: 22px;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(2rem, 7vw, 3.4rem);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--text-hi);
  margin: 12px 0 0;
  text-shadow: 0 0 26px rgba(34, 211, 238, 0.16);
}

.page-faq .faq-hero .lede {
  margin-top: 16px;
  max-width: 46ch;
  color: var(--text-2);
  line-height: 1.85;
}

.page-faq .faq-hero__acts {
  margin-top: 24px;
}

.page-faq .faq-hero__facts {
  list-style: none;
  margin: 28px 0 0;
  padding: 16px 0 0;
  border-top: 1px solid var(--line-soft);
  display: grid;
  gap: 12px;
}

.page-faq .faq-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-size: 0.9375rem;
  color: var(--text);
}

.page-faq .faq-hero__facts .mono-label {
  color: var(--cyan);
  flex: 0 0 auto;
}

/* ---------- 图表 ---------- */
.page-faq .faq-figure {
  margin: 0;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    repeating-linear-gradient(0deg, rgba(34, 211, 238, 0.06) 0 1px, transparent 1px 40px),
    repeating-linear-gradient(90deg, rgba(34, 211, 238, 0.06) 0 1px, transparent 1px 40px),
    var(--ink-1);
}

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

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

.page-faq .faq-figure--wide {
  aspect-ratio: 10 / 7;
  margin-top: 28px;
}

.page-faq .faq-figure .figure__cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--text-2);
  background: linear-gradient(180deg, rgba(7, 11, 22, 0), rgba(7, 11, 22, 0.92));
}

/* ---------- 布局：目录 + 问答 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: 28px;
}

.page-faq .faq-toc {
  border-bottom: 1px solid var(--line-soft);
  padding-bottom: 14px;
}

.page-faq .faq-toc__title {
  color: var(--text-2);
  margin-bottom: 10px;
}

.page-faq .faq-toc__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-faq .faq-toc__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 8px 12px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  color: var(--text-2);
  font-size: 0.875rem;
  text-decoration: none;
  transition: border-color 0.3s var(--ease), color 0.3s var(--ease), background-color 0.3s var(--ease);
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  border-color: var(--line);
  color: var(--text-hi);
  background: rgba(34, 211, 238, 0.06);
}

.page-faq .faq-toc__no {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: var(--cyan);
}

/* ---------- 章节 ---------- */
.page-faq .faq-sec {
  scroll-margin-top: 24px;
}

.page-faq .faq-sec + .faq-sec {
  margin-top: 56px;
  padding-top: 48px;
  border-top: 1px solid var(--line-soft);
}

.page-faq .faq-sec .chapter {
  margin-bottom: 20px;
}

.page-faq .faq-sec .chapter__title {
  color: var(--text-hi);
}

.page-faq .faq-sec .chapter__note {
  color: var(--text-2);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 10px;
}

.page-faq .qa {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(17, 21, 42, 0.78), rgba(10, 15, 30, 0.78));
  transition: border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-faq .qa:hover {
  border-color: var(--line);
}

.page-faq .qa[open] {
  border-color: var(--line);
  box-shadow: 0 14px 34px -26px rgba(34, 211, 238, 0.9);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px var(--faq-pad);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa__q:focus-visible {
  outline: 1px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .qa__no {
  flex: 0 0 auto;
  margin-top: 2px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: var(--violet);
}

.page-faq .qa__text {
  flex: 1 1 auto;
  font-weight: 500;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-hi);
}

.page-faq .qa__chev {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-top: 6px;
  border-right: 1px solid var(--cyan);
  border-bottom: 1px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform 0.3s var(--ease);
}

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

.page-faq .qa__a {
  padding: 0 var(--faq-pad) 18px 46px;
  color: var(--text-2);
  line-height: 1.85;
  font-size: 0.9375rem;
}

.page-faq .qa[open] .qa__a {
  animation: faq-open 0.32s var(--ease) both;
}

.page-faq .qa__a p + p {
  margin-top: 10px;
}

.page-faq .qa__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 211, 238, 0.42);
}

.page-faq .qa__a a:hover {
  color: var(--text-hi);
  border-bottom-color: var(--cyan);
}

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

/* ---------- 尾部行动区 ---------- */
.page-faq .faq-cta {
  margin-top: 64px;
  padding: 56px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-cta h2 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  line-height: 1.3;
  color: var(--text-hi);
  margin: 12px 0 0;
}

.page-faq .faq-cta p {
  margin-top: 14px;
  color: var(--text-2);
  line-height: 1.85;
  max-width: 52ch;
}

.page-faq .faq-cta p a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 211, 238, 0.42);
}

.page-faq .faq-cta .cluster {
  margin-top: 26px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .qa__a {
    padding-left: 58px;
    max-width: 72ch;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-hero {
    padding-top: 32px;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: center;
    gap: 56px;
  }

  .page-faq .faq-layout {
    grid-template-columns: 216px minmax(0, 1fr);
    gap: 64px;
    align-items: start;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 32px;
    border-bottom: 0;
    border-left: 1px solid var(--line-soft);
    padding: 0 0 0 18px;
  }

  .page-faq .faq-toc__list {
    flex-direction: column;
    gap: 6px;
    overflow: visible;
  }

  .page-faq .faq-toc__link {
    border-color: transparent;
    padding: 7px 10px;
    width: 100%;
  }

  .page-faq .faq-sec + .faq-sec {
    margin-top: 64px;
    padding-top: 56px;
  }

  .page-faq .faq-figure--wide {
    max-width: 84%;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-layout {
    grid-template-columns: 240px minmax(0, 1fr);
    gap: 80px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa,
  .page-faq .qa__chev,
  .page-faq .faq-toc__link {
    transition: none;
  }

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