.page-faq {
  --faq-rail: 252px;
  --faq-body: #4D4B44;
  --faq-line: rgba(43, 42, 38, .15);
  background: var(--paper);
  color: var(--char);
  font-family: var(--font-sans);
  padding-bottom: 104px;
}

.page-faq .lg-shell {
  padding-left: 18px;
  padding-right: 18px;
}

/* ---------- 首屏声明区 ---------- */

.page-faq .faq-masthead {
  position: relative;
  margin-top: 14px;
  padding: 32px 22px 28px;
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .faq-masthead::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    135deg,
    rgba(224, 178, 106, .10) 0 1px,
    transparent 1px 9px
  );
  pointer-events: none;
}

.page-faq .faq-masthead__index {
  position: relative;
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--copper-lt);
}

.page-faq .faq-masthead__title {
  position: relative;
  margin: 0 0 16px;
  max-width: 17em;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 29px;
  line-height: 1.32;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-faq .faq-masthead__lead {
  position: relative;
  margin: 0;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(245, 241, 232, .84);
}

/* ---------- 两栏骨架 ---------- */

.page-faq .faq-layout {
  display: block;
  margin-top: 28px;
}

.page-faq .faq-toc__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--ash);
}

.page-faq .faq-toc__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 2px 2px 10px;
  list-style: none;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

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

.page-faq .faq-toc__link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  white-space: nowrap;
  font-size: 13px;
  line-height: 1.4;
  color: var(--ink-2);
  text-decoration: none;
  background: var(--card);
  border-left: 2px solid transparent;
  border-radius: var(--radius);
  transition: background-color .16s ease, color .16s ease, border-color .16s ease;
}

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

.page-faq .faq-toc__num {
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--copper);
}

.page-faq .faq-toc__foot {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ash);
}

.page-faq .faq-toc__foot a {
  color: var(--pine);
  text-decoration: underline;
  text-decoration-color: rgba(31, 122, 104, .4);
  text-underline-offset: 3px;
}

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

.page-faq .faq-filter {
  padding-bottom: 6px;
}

/* ---------- 问题分组 ---------- */

.page-faq .faq-group {
  scroll-margin-top: 132px;
  padding-top: 40px;
}

.page-faq .faq-group + .faq-group {
  margin-top: 40px;
  border-top: 1px solid var(--faq-line);
}

.page-faq .faq-group__head {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-group__head::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 58px;
  height: 3px;
  background: var(--copper);
}

.page-faq .faq-group__num {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--copper);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 21px;
  line-height: 1.36;
  color: var(--ink);
}

.page-faq .faq-group__desc {
  margin: 0 0 18px;
  max-width: 44em;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--faq-body);
}

/* ---------- 折叠问答 ---------- */

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

.page-faq .faq-q__num {
  flex: 0 0 auto;
  min-width: 54px;
  padding: 2px 6px;
  font-size: 11.5px;
  letter-spacing: .06em;
  text-align: center;
  color: var(--copper);
  background: rgba(224, 178, 106, .13);
  border: 1px solid var(--copper-lt);
  border-radius: var(--radius);
}

.page-faq .faq-q__text {
  font-size: 15.5px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--ink);
}

.page-faq .faq-steps {
  display: grid;
  gap: 9px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-steps__item {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--faq-body);
}

.page-faq .faq-steps__num {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink);
  background: var(--card);
  border: 1px solid var(--copper-lt);
  border-radius: 4px;
}

/* ---------- 图文 ---------- */

.page-faq .faq-figure {
  margin: 24px 0 4px;
}

.page-faq .faq-figure--tall {
  max-width: 420px;
}

/* ---------- 版本差异对照 ---------- */

.page-faq .faq-compare-wrap {
  margin-bottom: 4px;
}

/* ---------- 浮动协助入口 ---------- */

.page-faq .faq-assist {
  position: fixed;
  right: 14px;
  bottom: 18px;
  z-index: 40;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--paper);
  text-decoration: none;
  background: var(--ink);
  border: 1px solid var(--copper);
  border-radius: 999px;
  box-shadow: 0 6px 18px rgba(14, 59, 51, .28);
  transition: background-color .16s ease, transform .16s ease;
}

.page-faq .faq-assist:hover,
.page-faq .faq-assist:focus-visible {
  background: var(--ink-2);
  transform: translateY(-1px);
}

.page-faq .faq-assist__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--copper);
}

/* ---------- 平板 ---------- */

@media (min-width: 720px) {
  .page-faq .lg-shell {
    padding-left: 28px;
    padding-right: 28px;
  }

  .page-faq .faq-masthead {
    padding: 44px 42px 38px;
  }

  .page-faq .faq-masthead__title {
    font-size: 40px;
  }

  .page-faq .faq-masthead__lead {
    font-size: 16px;
  }

  .page-faq .faq-group__title {
    font-size: 24px;
  }

  .page-faq .faq-q__text {
    font-size: 16px;
  }

  .page-faq .faq-assist {
    right: 24px;
    bottom: 24px;
    padding: 12px 20px;
  }
}

/* ---------- 桌面：左侧编号目录 + 右侧问答流 ---------- */

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    display: grid;
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
    margin-top: 40px;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 122px;
    padding: 4px 0 0;
    border-top: 2px solid var(--ink);
  }

  .page-faq .faq-toc__label {
    padding-top: 12px;
  }

  .page-faq .faq-toc__list {
    display: block;
    overflow: visible;
    padding: 0;
  }

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

  .page-faq .faq-toc__link {
    padding: 9px 10px 9px 14px;
    white-space: normal;
    background: transparent;
    border-left: 2px solid var(--faq-line);
    border-radius: 0;
    font-size: 13.5px;
  }

  .page-faq .faq-toc__link:hover,
  .page-faq .faq-toc__link:focus-visible {
    background: transparent;
    border-left-color: var(--copper);
    color: var(--ink-2);
  }

  .page-faq .faq-group {
    padding-top: 46px;
  }

  .page-faq .faq-group:first-of-type {
    padding-top: 0;
  }

  .page-faq .faq-group__title {
    font-size: 27px;
  }
}
</style>