.page-faq {
  background: var(--ink-950);
  color: var(--mist-050);
  font-family: var(--font-body);
  overflow-wrap: break-word;
}

.page-faq .shell {
  padding-block: 1.5rem 4rem;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
  padding: 1.75rem 0 2.25rem;
  border-bottom: var(--hair);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -3rem;
  right: -3rem;
  width: min(70vw, 380px);
  height: min(70vw, 380px);
  background:
    radial-gradient(circle at 68% 32%, rgba(38, 227, 212, 0.13), transparent 62%),
    radial-gradient(circle at 28% 74%, rgba(27, 44, 80, 0.6), transparent 66%);
  pointer-events: none;
}

.page-faq .faq-hero__main {
  position: relative;
  min-width: 0;
}

.page-faq .page-title {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 5vw, 3rem);
  line-height: 1.12;
  letter-spacing: -0.022em;
  font-weight: 700;
  color: var(--mist-050);
  margin: 0.6rem 0 0.9rem;
  max-width: 18ch;
}

.page-faq .page-lead {
  max-width: 58ch;
  margin: 0;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--mist-500);
}

.page-faq .faq-hero__sign {
  position: relative;
  padding: 1rem 1.15rem 1.1rem;
  border: var(--hair);
  border-left: 2px solid var(--cyan-400);
  border-radius: var(--radius);
  background: linear-gradient(152deg, rgba(27, 44, 80, 0.6), rgba(17, 23, 38, 0.92));
  box-shadow: var(--shadow-micro);
}

.page-faq .faq-hero__sign-k {
  margin: 0 0 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist-500);
}

.page-faq .faq-hero__sign-v {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 2.2rem;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--cyan-400);
}

.page-faq .faq-hero__sign-note {
  margin: 0;
  font-size: 0.8rem;
  line-height: 1.65;
  color: var(--mist-500);
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2rem;
  margin-top: 2.25rem;
}

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

/* ---------- 场景导航 ---------- */
.page-faq .faq-nav {
  padding-left: 1rem;
  border-left: var(--hair);
}

.page-faq .faq-nav__title {
  margin: 0 0 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist-500);
}

.page-faq .faq-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.15rem;
}

.page-faq .faq-nav__link {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  padding: 0.42rem 0.5rem;
  font-size: 0.87rem;
  line-height: 1.5;
  color: var(--mist-500);
  text-decoration: none;
  border-radius: 0 var(--radius) var(--radius) 0;
  border-left: 2px solid transparent;
  transition: color 160ms var(--ease-out), background-color 160ms var(--ease-out), border-color 160ms var(--ease-out);
}

.page-faq .faq-nav__link:hover,
.page-faq .faq-nav__link:focus-visible {
  color: var(--mist-050);
  background: rgba(42, 52, 72, 0.42);
  border-left-color: var(--cyan-400);
}

.page-faq .faq-nav__num {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--cyan-400);
  flex: none;
}

/* ---------- 章节 ---------- */
.page-faq .faq-sec {
  padding-bottom: 2.6rem;
  margin-bottom: 2.6rem;
  border-bottom: var(--hair-soft);
  scroll-margin-top: 6rem;
}

.page-faq .faq-sec:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: 0;
}

.page-faq .faq-sec h2 {
  font-family: var(--font-display);
  font-size: clamp(1.28rem, 3vw, 1.8rem);
  line-height: 1.2;
  letter-spacing: -0.018em;
  font-weight: 700;
  color: var(--mist-050);
  margin: 0.3rem 0 0.7rem;
  max-width: 22ch;
}

.page-faq .faq-sec__lead {
  max-width: 62ch;
  margin: 0 0 1.5rem;
  font-size: 0.96rem;
  line-height: 1.8;
  color: var(--mist-500);
}

/* ---------- 图文错位分栏 ---------- */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
  margin-bottom: 1.75rem;
}

.page-faq .faq-split > * {
  min-width: 0;
}

/* ---------- 配图 ---------- */
.page-faq .figure {
  margin: 0;
  border: var(--hair);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--carbon-900);
  box-shadow: var(--shadow-micro);
}

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

.page-faq .figure__cap {
  margin: 0;
  padding: 0.6rem 0.85rem;
  border-top: var(--hair-soft);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--mist-500);
}

.page-faq .figure--band {
  margin-bottom: 1.75rem;
}

/* ---------- 有序步骤 ---------- */
.page-faq .steps {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .steps > li {
  position: relative;
  margin-left: 0.85rem;
  padding: 0.4rem 0 0.4rem 2.5rem;
  border-left: var(--hair-soft);
  font-size: 0.94rem;
  line-height: 1.75;
  color: var(--mist-050);
}

.page-faq .steps > li::before {
  content: counter(faqstep, decimal-leading-zero);
  position: absolute;
  left: 0.55rem;
  top: 0.42rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--cyan-400);
}

.page-faq .steps {
  counter-reset: faqstep;
}

.page-faq .steps > li {
  counter-increment: faqstep;
}

/* ---------- 问答 ---------- */
.page-faq .qa-flow {
  border-top: var(--hair-soft);
}

.page-faq .qa {
  padding: 1.1rem 0;
  border-bottom: var(--hair-soft);
}

.page-faq .qa__q {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  margin: 0 0 0.55rem;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: 0.004em;
  color: var(--mist-050);
}

.page-faq .qa__q::before {
  content: "Q";
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--orange-500);
}

.page-faq .qa__a {
  max-width: 64ch;
  color: var(--mist-500);
  font-size: 0.94rem;
  line-height: 1.8;
}

.page-faq .qa__a p {
  margin: 0 0 0.55rem;
}

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

.page-faq .qa__a a {
  color: var(--cyan-400);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-faq .qa__a a:hover {
  color: var(--mist-050);
}

.page-faq .qa__a .steps > li {
  color: var(--mist-050);
}

.page-faq .faq-note {
  margin: 1.35rem 0 0;
  padding: 0.9rem 1.1rem;
  border: var(--hair);
  border-left: 2px solid var(--orange-500);
  border-radius: var(--radius);
  background: rgba(17, 23, 38, 0.72);
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--mist-500);
}

.page-faq .faq-note a {
  color: var(--cyan-400);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-faq .faq-note a:hover {
  color: var(--mist-050);
}

/* ---------- 聚焦态 ---------- */
.page-faq a:focus-visible,
.page-faq .figure:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 600px) {
  .page-faq .shell {
    padding-block: 2rem 5rem;
  }

  .page-faq .faq-hero {
    padding: 2.25rem 0 2.75rem;
  }

  .page-faq .faq-split {
    grid-template-columns: minmax(0, 1.04fr) minmax(0, 1fr);
    gap: 2rem;
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    grid-template-columns: minmax(0, 1.6fr) minmax(220px, 0.72fr);
    align-items: end;
    gap: 3rem;
    padding: 3rem 0 3.5rem;
  }

  .page-faq .faq-layout {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: 3.25rem;
    margin-top: 3rem;
    align-items: start;
  }

  .page-faq .faq-nav {
    position: sticky;
    top: 6rem;
  }

  .page-faq .faq-hero__sign {
    justify-self: end;
    width: min(100%, 260px);
  }

  .page-faq .faq-sec {
    padding-bottom: 3.2rem;
    margin-bottom: 3.2rem;
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-layout {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: 4rem;
  }

  .page-faq .faq-sec h2 {
    font-size: 1.9rem;
  }
}

/* ---------- 窄屏收敛 ---------- */
@media (max-width: 599px) {
  .page-faq .page-title {
    font-size: 1.62rem;
    max-width: none;
  }

  .page-faq .faq-nav {
    padding-left: 0.75rem;
  }

  .page-faq .faq-sec h2 {
    font-size: 1.24rem;
    max-width: none;
  }

  .page-faq .qa__q {
    font-size: 0.95rem;
  }

  .page-faq .steps > li {
    margin-left: 0.5rem;
    padding-left: 2.15rem;
    font-size: 0.9rem;
  }

  .page-faq .steps > li::before {
    left: 0.4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-nav__link {
    transition: none;
  }
}
</final-answer>