.page-faq {
  --faq-aside: 186px;
  --faq-ink-soft: rgba(20, 17, 15, .58);
  --faq-hair: 1px solid var(--line);
  padding-bottom: clamp(56px, 9vw, 112px);
}

.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: clamp(18px, 3vw, 28px) 0 0;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--faq-ink-soft);
}

.page-faq .breadcrumb a {
  color: var(--faq-ink-soft);
  text-decoration: none;
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--ochre);
}

.page-faq .breadcrumb__sep {
  color: var(--line-strong);
}

.page-faq .breadcrumb [aria-current="page"] {
  color: var(--ochre-deep);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  padding: clamp(26px, 4.5vw, 58px) 0 clamp(26px, 4vw, 46px);
  border-bottom: var(--faq-hair);
}

.page-faq .faq-hero .index-num {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ochre);
}

.page-faq .faq-hero__title {
  margin: 14px 0 18px;
  font-size: clamp(32px, 6.6vw, 78px);
  font-weight: 700;
  line-height: 1.03;
  letter-spacing: -.03em;
  color: var(--ochre-deep);
  max-width: 16ch;
}

.page-faq .faq-hero__lede {
  font-size: clamp(16px, 1.7vw, 19px);
  line-height: 1.72;
  max-width: 60ch;
  color: var(--ink);
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 22px;
  margin-top: 24px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--faq-ink-soft);
}

.page-faq .faq-hero__meta span::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-right: 8px;
  background: var(--lake);
  vertical-align: middle;
}

/* ---------- 布局 ---------- */

.page-faq .faq-layout {
  padding-top: clamp(26px, 4vw, 54px);
  display: block;
}

.page-faq .faq-index {
  margin-bottom: clamp(22px, 4vw, 38px);
}

.page-faq .faq-index__head {
  margin: 0;
  padding-bottom: 10px;
  border-bottom: var(--faq-hair);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--faq-ink-soft);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 12px 0 4px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-faq .faq-index__link {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 8px 13px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  font-size: 13px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color .2s var(--ease), background-color .2s var(--ease), color .2s var(--ease);
}

.page-faq .faq-index__link .n {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ochre);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-color: var(--ochre);
  background: var(--ochre-soft);
  color: var(--ochre-deep);
}

/* ---------- 分组 ---------- */

.page-faq .faq-group {
  padding: clamp(28px, 4.5vw, 54px) 0;
  border-top: var(--faq-hair);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-group:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-faq .faq-group__head .index-num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--ochre);
}

.page-faq .faq-group__head .h2 {
  margin: 10px 0 12px;
  font-size: clamp(22px, 3.6vw, 36px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -.02em;
  max-width: 22ch;
}

.page-faq .faq-group__head .prose {
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--faq-ink-soft);
}

/* ---------- 图片 ---------- */

.page-faq .faq-figure {
  margin: clamp(20px, 3vw, 32px) 0;
  border: 1px solid var(--line);
  background: var(--ochre-soft);
}

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

.page-faq .faq-figure .media-frame__caption {
  padding: 10px 14px;
  border-top: 1px solid var(--line);
  background: var(--paper);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--faq-ink-soft);
}

.page-faq .faq-figure--support {
  background: var(--lake-soft);
}

/* ---------- 手风琴 ---------- */

.page-faq .faq-list {
  margin-top: clamp(18px, 3vw, 30px);
  border-bottom: var(--faq-hair);
}

.page-faq .faq-item {
  border-top: var(--faq-hair);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 19px 0;
  cursor: pointer;
  list-style: none;
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: -.01em;
  color: var(--ink);
  transition: color .2s var(--ease);
}

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

.page-faq .faq-item > summary:hover,
.page-faq .faq-item > summary:focus-visible {
  color: var(--ochre);
}

.page-faq .faq-item__q {
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .faq-item__chev {
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  margin-top: 6px;
  color: var(--lake);
  transition: transform .28s var(--ease), color .2s var(--ease);
}

.page-faq .faq-item[open] > summary {
  color: var(--ochre-deep);
}

.page-faq .faq-item[open] .faq-item__chev {
  transform: rotate(90deg);
  color: var(--ochre);
}

.page-faq .faq-item__a {
  padding: 4px 0 24px;
  border-left: 2px solid var(--lake);
  padding-left: 16px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ink);
  animation: faqIn .32s var(--ease) both;
}

.page-faq .faq-item__a p {
  margin: 0 0 12px;
  max-width: 62ch;
}

.page-faq .faq-item__a p:last-child {
  margin-bottom: 0;
}

.page-faq .faq-item__a a {
  color: var(--lake);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  color: var(--ochre-deep);
}

@keyframes faqIn {
  from {
    opacity: 0;
    transform: translateY(-6px);
    background-color: rgba(207, 227, 224, .55);
  }
  to {
    opacity: 1;
    transform: none;
    background-color: transparent;
  }
}

/* ---------- 步骤列表 ---------- */

.page-faq .steps {
  counter-reset: step;
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: grid;
  gap: 10px;
  max-width: 62ch;
}

.page-faq .steps > li {
  counter-increment: step;
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
}

.page-faq .steps > li::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--mono);
  font-size: 11.5px;
  line-height: 1.9;
  letter-spacing: .04em;
  color: var(--ochre);
}

/* ---------- 入口路径示意 ---------- */

.page-faq .path-diagram {
  display: block;
  width: 100%;
  max-width: 560px;
  height: auto;
  margin: 18px 0 6px;
  color: var(--ochre);
}

.page-faq .path-diagram .pd-box {
  fill: rgba(239, 217, 209, .5);
  stroke: var(--line-strong);
}

.page-faq .path-diagram .pd-label {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 700;
  fill: var(--ochre-deep);
}

.page-faq .path-diagram .pd-sub {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .12em;
  fill: rgba(20, 17, 15, .5);
}

.page-faq .path-diagram .pd-foot {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .06em;
  fill: var(--lake);
}

/* ---------- 双语示例表 ---------- */

.page-faq .bi-table {
  margin: 14px 0 6px;
  border-top: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .bi-table__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 1px minmax(0, 1fr);
  gap: 12px;
  padding: 9px 8px;
  border-bottom: var(--faq-hair);
  font-size: 14px;
}

.page-faq .bi-table__row:last-child {
  border-bottom: 0;
}

.page-faq .bi-table__row:nth-child(odd) {
  background: rgba(207, 227, 224, .38);
}

.page-faq .bi-table__row--head {
  background: var(--lake);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.page-faq .bi-table__cell {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  min-width: 0;
}

.page-faq .bi-table__rule {
  background: var(--lake);
  opacity: .55;
}

.page-faq .bi-table__row--head .bi-table__rule {
  background: var(--paper);
  opacity: .5;
}

.page-faq .bi-table__en {
  font-style: italic;
  font-weight: 300;
}

.page-faq .bi-table__val {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-weight: 400;
}

/* ---------- 底部支持块 ---------- */

.page-faq .faq-support {
  margin-top: clamp(32px, 5vw, 64px);
  padding: clamp(22px, 3.4vw, 40px);
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--ochre);
  background: var(--paper);
}

.page-faq .faq-support .index-num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ochre);
}

.page-faq .faq-support__title {
  margin: 10px 0 20px;
  font-size: clamp(20px, 3vw, 30px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -.02em;
  max-width: 22ch;
}

.page-faq .faq-support__list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: var(--faq-hair);
}

.page-faq .faq-support__list li {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 10px;
  padding: 10px 0;
  border-bottom: var(--faq-hair);
  font-size: 14.5px;
  line-height: 1.6;
  word-break: break-word;
}

.page-faq .faq-support__list .k {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--faq-ink-soft);
  padding-top: 2px;
}

.page-faq .faq-support__list .num {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-support__note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--faq-ink-soft);
  max-width: 56ch;
}

/* ---------- 桌面 ---------- */

@media (min-width: 900px) {
  .page-faq .faq-layout {
    display: grid;
    grid-template-columns: var(--faq-aside) minmax(0, 1fr);
    gap: clamp(28px, 4.5vw, 72px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    margin-bottom: 0;
  }

  .page-faq .faq-index__list {
    display: block;
    overflow: visible;
    padding: 14px 0 0;
  }

  .page-faq .faq-index__link {
    display: flex;
    justify-content: flex-start;
    border: 0;
    border-left: 1px solid var(--line);
    padding: 9px 0 9px 13px;
    margin-bottom: 2px;
    background: transparent;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    border-left-color: var(--ochre);
    border-left-width: 2px;
    padding-left: 12px;
    background: transparent;
  }

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

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

  .page-faq .faq-figure--support {
    max-width: 62%;
  }

  .page-faq .faq-support__list li {
    grid-template-columns: 96px minmax(0, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__a {
    animation: none;
  }

  .page-faq .faq-item__chev,
  .page-faq .faq-index__link {
    transition: none;
  }
}
<<<END>>>