.page-faq {
  --faq-rail: 240px;
  --faq-col-gap: clamp(28px, 5vw, 72px);
  --faq-sticky: calc(var(--header-h) + 24px);
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 5vw, 60px) 0 clamp(34px, 5vw, 68px);
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(30, 44, 85, .6) 0%, rgba(16, 26, 58, 0) 78%),
    var(--bg);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .55;
  background-image: linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 112px 100%;
}

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

.page-faq .faq-hero .breadcrumbs {
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-faq .faq-hero__grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

.page-faq .faq-hero h1 {
  margin: 10px 0 20px;
  max-width: 20ch;
  font-family: var(--font-display);
  font-size: clamp(30px, 6.6vw, 56px);
  line-height: 1.14;
  letter-spacing: .01em;
  color: var(--ink);
}

.page-faq .faq-hero__facts {
  display: grid;
  gap: 14px;
  margin: 0;
  padding-left: 18px;
  border-left: 1px solid var(--line-strong);
}

.page-faq .faq-hero__facts > div {
  display: grid;
  gap: 3px;
}

.page-faq .faq-hero__facts dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-faq .faq-hero__facts dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--ink);
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1fr) 250px;
    align-items: end;
  }
}

/* ============ 四类入口 ============ */
.page-faq .faq-index__head {
  display: grid;
  gap: 14px;
  max-width: 720px;
}

.page-faq .faq-index__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 4.2vw, 38px);
  line-height: 1.2;
  color: var(--ink);
}

.page-faq .faq-index__figure {
  margin: clamp(24px, 4vw, 40px) 0 0;
  border: 1px solid var(--line);
  background: var(--bg-deep);
}

.page-faq .faq-index__figure img {
  display: block;
  width: 100%;
  height: auto;
  opacity: .92;
}

.page-faq .faq-index__grid {
  display: grid;
  gap: 1px;
  margin-top: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-top: 0;
}

.page-faq .faq-cat {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 26px 22px 22px;
  background: var(--bg-raise);
  border-top: 2px solid transparent;
  color: inherit;
  text-decoration: none;
  transition: background .3s var(--ease), border-color .3s var(--ease), transform .3s var(--ease);
}

.page-faq .faq-cat:hover,
.page-faq .faq-cat:focus-visible {
  border-top-color: var(--cyan);
  background: linear-gradient(180deg, rgba(53, 225, 208, .08) 0%, rgba(30, 44, 85, 1) 62%);
  transform: translateY(-2px);
}

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

.page-faq .faq-cat__num {
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--slate);
}

.page-faq .faq-cat h3 {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink);
}

.page-faq .faq-cat p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--ink-soft);
}

.page-faq .faq-cat__more {
  margin-top: auto;
  padding-top: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--slate);
  transition: color .25s var(--ease);
}

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

@media (min-width: 720px) {
  .page-faq .faq-index__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1100px) {
  .page-faq .faq-index__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ============ 目录 + 正文 双栏 ============ */
.page-faq .faq-shell {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  padding-top: clamp(32px, 5vw, 72px);
  padding-bottom: clamp(40px, 7vw, 88px);
}

.page-faq .faq-toc {
  position: sticky;
  top: var(--header-h);
  z-index: 4;
  padding: 10px 0;
  margin-bottom: 4px;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-toc__title {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-faq .faq-toc__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  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: baseline;
  gap: 8px;
  padding: 8px 12px;
  white-space: nowrap;
  font-size: 14px;
  color: var(--ink-soft);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: color .2s var(--ease), border-color .2s var(--ease), background .2s var(--ease);
}

.page-faq .faq-toc__link .mono {
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--slate);
}

.page-faq .faq-toc__link:hover,
.page-faq .faq-toc__link:focus-visible {
  color: var(--ink);
  border-color: var(--line-strong);
  background: rgba(199, 210, 232, .06);
}

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

.page-faq .faq-toc__note {
  display: none;
  margin: 20px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-dim);
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

@media (min-width: 1024px) {
  .page-faq .faq-shell {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    column-gap: var(--faq-col-gap);
    align-items: start;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: var(--faq-sticky);
    z-index: 1;
    padding: 0 0 0 18px;
    margin-bottom: 0;
    background: transparent;
    border-bottom: 0;
    border-left: 1px solid var(--line-strong);
  }

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

  .page-faq .faq-toc__link {
    display: flex;
    padding: 11px 0;
    white-space: normal;
    border: 0;
    border-bottom: 1px solid var(--line);
    border-radius: 0;
    background: transparent;
  }

  .page-faq .faq-toc__link:hover,
  .page-faq .faq-toc__link:focus-visible {
    background: transparent;
    color: var(--ink);
    padding-left: 6px;
    border-bottom-color: var(--line-strong);
  }

  .page-faq .faq-toc__note {
    display: block;
  }
}

/* ============ 问答正文 ============ */
.page-faq .faq-flow {
  display: grid;
  gap: clamp(44px, 7vw, 88px);
  min-width: 0;
}

.page-faq .faq-block {
  min-width: 0;
  scroll-margin-top: calc(var(--header-h) + 84px);
}

@media (min-width: 1024px) {
  .page-faq .faq-block {
    scroll-margin-top: calc(var(--header-h) + 56px);
  }
}

.page-faq .faq-block__head {
  padding-top: clamp(16px, 2.4vw, 24px);
  margin-bottom: clamp(18px, 3vw, 28px);
  border-top: 1px solid var(--line-strong);
}

.page-faq .faq-block__head .eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-faq .faq-block__head h2 {
  margin: 8px 0 0;
  max-width: 24ch;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.6vw, 34px);
  line-height: 1.2;
  color: var(--ink);
}

.page-faq .faq-conclusion {
  margin: 0 0 clamp(20px, 3vw, 32px);
  padding: 2px 0 2px 18px;
  border-left: 3px solid var(--silver);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--ink);
}

.page-faq .qa {
  padding: clamp(18px, 2.5vw, 26px) 0;
  border-top: 1px solid var(--line);
}

.page-faq .qa:first-of-type {
  border-top: 0;
}

.page-faq .qa__q {
  display: flex;
  gap: 12px;
  align-items: baseline;
  margin: 0 0 12px;
  font-size: clamp(16px, 1.8vw, 19px);
  font-weight: 600;
  line-height: 1.55;
  color: var(--ink);
}

.page-faq .qa__idx {
  flex: none;
  padding-top: 4px;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--slate);
  transition: color .25s var(--ease);
}

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

.page-faq .qa__a {
  padding-left: 34px;
  font-size: var(--fs-body);
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-faq .qa__a p {
  margin: 0 0 12px;
}

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

.page-faq .qa__steps {
  counter-reset: faqstep;
  display: grid;
  gap: 10px;
  margin: 14px 0;
  padding: 0;
  list-style: none;
}

.page-faq .qa__steps li {
  counter-increment: faqstep;
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  line-height: 1.72;
}

.page-faq .qa__steps li::before {
  content: counter(faqstep, decimal-leading-zero);
  padding-top: 5px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--cyan);
}

@media (max-width: 560px) {
  .page-faq .qa__a {
    padding-left: 0;
  }

  .page-faq .qa__q {
    display: block;
  }

  .page-faq .qa__idx {
    display: block;
    padding-top: 0;
    margin-bottom: 4px;
  }
}

/* ============ 插图 ============ */
.page-faq .faq-figure {
  margin: clamp(18px, 3vw, 28px) 0 clamp(22px, 3.4vw, 34px);
  border: 1px solid var(--line);
  background: var(--bg-deep);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.page-faq .faq-figure figcaption {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--ink-dim);
}

/* ============ 双端差异表 ============ */
.page-faq .faq-diff {
  margin-top: 16px;
  border: 1px solid var(--line);
  background: var(--bg-deep);
}

.page-faq .faq-diff .data-table {
  min-width: 560px;
}

.page-faq .faq-diff thead th {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--slate);
  background: rgba(199, 210, 232, .05);
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .faq-diff tbody th {
  color: var(--ink);
  font-weight: 600;
  white-space: nowrap;
  border-left: 2px solid var(--line-strong);
}

.page-faq .faq-diff tbody tr:hover td,
.page-faq .faq-diff tbody tr:hover th {
  background: rgba(53, 225, 208, .06);
}

/* ============ 兜底指引 ============ */
.page-faq .faq-help {
  border-top: 1px solid var(--line-strong);
  background:
    linear-gradient(180deg, rgba(10, 17, 41, .85) 0%, rgba(6, 11, 24, .92) 100%),
    var(--bg-deep);
}

.page-faq .faq-help__inner {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-faq .faq-help__text h2 {
  margin: 10px 0 16px;
  max-width: 22ch;
  font-family: var(--font-display);
  font-size: clamp(22px, 3.6vw, 34px);
  line-height: 1.2;
  color: var(--ink);
}

.page-faq .faq-help__text .prose {
  margin: 0 0 20px;
  max-width: 60ch;
  color: var(--ink-soft);
}

.page-faq .faq-help__list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-help__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px;
  background: var(--bg-deep);
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.page-faq .faq-help__list .mono {
  flex: none;
  min-width: 88px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--silver);
}

.page-faq .faq-help__side {
  align-self: start;
  padding: clamp(20px, 3vw, 28px);
  border: 1px solid var(--line-strong);
  border-top: 2px solid var(--cyan);
  background: rgba(30, 44, 85, .5);
}

.page-faq .faq-help__side p {
  margin: 0 0 20px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-faq .faq-help__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (min-width: 900px) {
  .page-faq .faq-help__inner {
    grid-template-columns: minmax(0, 1fr) 320px;
    align-items: start;
  }
}
<<<END>>>