.page-faq {
  --faq-pad: clamp(18px, 3vw, 30px);
  --faq-body: rgba(242, 247, 245, 0.82);
  padding-bottom: clamp(64px, 9vw, 120px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(26px, 5vw, 64px) 0 clamp(26px, 4vw, 54px);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: -38%;
  right: -16%;
  width: clamp(220px, 46vw, 560px);
  aspect-ratio: 1 / 1;
  background: repeating-linear-gradient(
    112deg,
    var(--cyan-08) 0 1px,
    transparent 1px 24px
  );
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

.page-faq .faq-hero > * {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(30px, 6.2vw, 58px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-top: 14px;
  max-width: 16em;
}

.page-faq .faq-hero__lede {
  margin-top: 18px;
  max-width: 62ch;
  color: var(--faq-body);
  line-height: 1.78;
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__fact {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: var(--ink-800);
  font-size: 13px;
  color: var(--mist);
}

.page-faq .faq-hero__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 17px;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
}

/* ---------- 布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 40px);
  margin-top: clamp(26px, 4vw, 52px);
}

/* ---------- 目录 ---------- */
.page-faq .faq-toc {
  position: sticky;
  top: var(--topbar-h);
  z-index: 20;
  margin: 0 calc(-1 * var(--gutter)) 0;
  padding: 12px var(--gutter) 10px;
  background: var(--ink-900);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-toc__title {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-faq .faq-toc__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .faq-toc__item {
  flex: 0 0 auto;
}

.page-faq .faq-toc__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 15px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  background: var(--ink-800);
  color: var(--white);
  font-size: 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--t-fast) var(--ease), color var(--t-fast) var(--ease),
    border-color var(--t-fast) var(--ease);
}

.page-faq .faq-toc__num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
  transition: color var(--t-fast) var(--ease);
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--ink-900);
}

.page-faq .faq-toc__link:hover .faq-toc__num,
.page-faq .faq-toc__link:focus-visible .faq-toc__num {
  color: var(--ink-900);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--topbar-h) + 96px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(46px, 6vw, 84px);
}

.page-faq .faq-group__head {
  padding-bottom: 16px;
  margin-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: clamp(28px, 5vw, 40px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-group__title {
  margin-top: 10px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(20px, 3.2vw, 28px);
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.page-faq .faq-group__intro {
  margin-top: 8px;
  max-width: 58ch;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.72;
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-item {
  padding: var(--faq-pad);
  background: var(--ink-800);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
}

.page-faq .faq-item + .faq-item {
  margin-top: 14px;
}

.page-faq .faq-item__q {
  display: flex;
  gap: 12px;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(17px, 2.3vw, 20px);
  line-height: 1.5;
}

.page-faq .faq-item__idx {
  flex: 0 0 auto;
  padding-top: 0.22em;
  font-family: var(--font-mono);
  font-size: 0.8em;
  font-weight: 700;
  color: var(--amber);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-item__lead {
  margin-top: 14px;
  padding: 12px 16px;
  border-left: 3px solid var(--amber);
  border-radius: 0 var(--r-xs) var(--r-xs) 0;
  background: var(--amber-14);
  color: var(--white);
  font-weight: 600;
  line-height: 1.72;
}

.page-faq .faq-item__body {
  margin-top: 14px;
  color: var(--faq-body);
  font-size: 16px;
  line-height: 1.78;
}

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

.page-faq .faq-item__more {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  color: var(--mist);
  font-size: 14px;
  text-decoration: none;
  transition: color var(--t-fast) var(--ease);
}

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

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: 22px 0 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--ink-700);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
}

.page-faq .faq-figure__cap {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 结尾 ---------- */
.page-faq .faq-cta {
  margin-top: clamp(46px, 7vw, 92px);
  padding: clamp(24px, 4vw, 44px);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(135deg, var(--ink-800), var(--ink-700));
}

.page-faq .faq-cta__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(20px, 3.2vw, 30px);
  line-height: 1.28;
  letter-spacing: -0.01em;
}

.page-faq .faq-cta__text {
  margin-top: 12px;
  max-width: 56ch;
  color: var(--faq-body);
  line-height: 1.78;
}

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

/* ---------- 桌面 ---------- */
@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: 250px minmax(0, 1fr);
    align-items: start;
    gap: clamp(36px, 5vw, 84px);
    margin-top: clamp(40px, 5vw, 72px);
  }

  .page-faq .faq-toc {
    position: sticky;
    top: calc(var(--topbar-h) + 40px);
    margin: 0;
    padding: 0;
    background: transparent;
    border-bottom: 0;
  }

  .page-faq .faq-toc__title {
    margin-bottom: 14px;
  }

  .page-faq .faq-toc__list {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding-bottom: 0;
  }

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

  .page-faq .faq-toc__link {
    width: 100%;
    justify-content: flex-start;
    gap: 12px;
    padding: 11px 14px;
    border-color: transparent;
    border-radius: var(--r-sm);
    background: transparent;
    color: var(--faq-body);
  }

  .page-faq .faq-toc__link::before {
    content: "";
    position: absolute;
    left: 0;
    top: 9px;
    bottom: 9px;
    width: 2px;
    background: var(--cyan);
    opacity: 0;
    transition: opacity var(--t-fast) var(--ease);
  }

  .page-faq .faq-toc__link:hover,
  .page-faq .faq-toc__link:focus-visible {
    background: var(--ink-800);
    border-color: var(--line);
    color: var(--white);
  }

  .page-faq .faq-toc__link:hover::before,
  .page-faq .faq-toc__link:focus-visible::before {
    opacity: 1;
  }

  .page-faq .faq-toc__link:hover .faq-toc__num,
  .page-faq .faq-toc__link:focus-visible .faq-toc__num {
    color: var(--amber);
  }

  .page-faq .faq-group {
    scroll-margin-top: calc(var(--topbar-h) + 40px);
  }

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

/* ---------- 大屏 ---------- */
@media (min-width: 1440px) {
  .page-faq .faq-layout {
    grid-template-columns: 286px minmax(0, 1fr);
  }

  .page-faq .faq-item__body {
    font-size: 17px;
  }
}

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