.page-faq {
  --faq-rail-w: 288px;
  --faq-pad: clamp(1rem, 3vw, 1.6rem);
  padding-bottom: clamp(3rem, 8vw, 6rem);
}

/* ---------- 面包屑与首屏 ---------- */
.page-faq .bx-breadcrumb {
  margin-top: clamp(1rem, 3vw, 1.6rem);
}

.page-faq .faq-hero {
  padding-top: clamp(1.2rem, 4vw, 2.4rem);
  padding-bottom: clamp(1.4rem, 3.5vw, 2.2rem);
  border-bottom: var(--line);
}

.page-faq .faq-hero .bx-title {
  max-width: 22ch;
  margin-top: 0.55rem;
}

.page-faq .faq-hero .bx-subtitle {
  max-width: 60ch;
  margin-top: 0.9rem;
  color: var(--ink-70);
  font-size: 1rem;
  line-height: 1.72;
}

.page-faq .faq-quick {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin-top: 1.35rem;
}

.page-faq .faq-quick-label {
  font-family: var(--font-serif);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  color: var(--mint);
  margin-right: 0.2rem;
}

.page-faq .faq-quick a {
  display: inline-flex;
  align-items: center;
  padding: 0.38rem 0.78rem;
  border: var(--line);
  border-radius: var(--r-pill);
  background: var(--cyan-06);
  color: var(--ink-70);
  font-size: 0.82rem;
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-quick a:hover,
.page-faq .faq-quick a:focus-visible {
  background: var(--cyan);
  border-color: var(--cyan);
  color: var(--abyss);
}

/* ---------- 顶部分类导览图 ---------- */
.page-faq .faq-map {
  margin-top: clamp(1.4rem, 3vw, 2.2rem);
  border-radius: var(--r-lg);
  overflow: hidden;
  border: var(--line);
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-map .bx-media__img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 主体双栏 ---------- */
.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.75rem);
  padding-top: clamp(1.6rem, 4vw, 2.6rem);
}

/* ---------- 左侧分类索引 ---------- */
.page-faq .faq-rail {
  border: var(--line);
  border-radius: var(--r-lg);
  background: rgba(18, 58, 82, 0.42);
  padding: var(--faq-pad);
  align-self: start;
}

.page-faq .faq-rail-label {
  margin: 0 0 0.75rem;
  font-family: var(--font-serif);
  font-size: 0.76rem;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.page-faq .faq-toc {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.32rem;
}

.page-faq .faq-toc-link {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.55rem;
  padding: 0.52rem 0.6rem;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  color: var(--ink-70);
  font-size: 0.88rem;
  text-decoration: none;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.page-faq .faq-toc-icon {
  display: block;
  width: 24px;
  height: 24px;
  color: var(--cyan);
}

.page-faq .faq-toc-icon svg {
  width: 100%;
  height: 100%;
  display: block;
}

.page-faq .faq-toc-text {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.page-faq .faq-toc-count {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.5;
  min-width: 1.35rem;
  padding: 0 0.32rem;
  text-align: center;
  border-radius: var(--r-pill);
  background: var(--cyan);
  color: var(--abyss);
}

.page-faq .faq-toc-link:hover,
.page-faq .faq-toc-link:focus-visible,
.page-faq:has(#q-account:target) .faq-toc-link[href="#q-account"],
.page-faq:has(#q-score:target) .faq-toc-link[href="#q-score"],
.page-faq:has(#q-preview:target) .faq-toc-link[href="#q-preview"],
.page-faq:has(#q-device:target) .faq-toc-link[href="#q-device"],
.page-faq:has(#q-alert:target) .faq-toc-link[href="#q-alert"],
.page-faq:has(#q-service:target) .faq-toc-link[href="#q-service"] {
  background: var(--mid);
  border-color: var(--cyan-32);
  color: var(--mint);
}

/* ---------- 问答流 ---------- */
.page-faq .faq-section {
  scroll-margin-top: calc(var(--header-h) + 1.25rem);
}

.page-faq .faq-section + .faq-section {
  margin-top: clamp(2rem, 5vw, 3.2rem);
}

.page-faq .faq-band {
  display: flex;
  align-items: baseline;
  gap: 0.7rem;
  padding-bottom: 0.65rem;
  margin-bottom: 1rem;
  border-bottom: var(--line-strong);
}

.page-faq .faq-band-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-faq .faq-band-title {
  margin: 0;
  font-size: clamp(1.12rem, 2.4vw, 1.45rem);
  letter-spacing: -0.01em;
  color: var(--sand);
}

.page-faq .faq-band-meta {
  margin-left: auto;
  font-size: 0.75rem;
  color: var(--muted);
  white-space: nowrap;
}

.page-faq .faq-figure {
  margin: 0 0 1.1rem;
  border-radius: var(--r-md);
  overflow: hidden;
  border: var(--line);
}

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

.page-faq .faq-figcap {
  padding: 0.5rem 0.7rem 0.6rem;
  font-size: 0.75rem;
  line-height: 1.6;
  color: var(--muted);
  background: rgba(10, 34, 51, 0.55);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  border: 1px solid var(--cyan-18);
  border-radius: var(--r-md);
  background: linear-gradient(158deg, rgba(18, 58, 82, 0.52), rgba(10, 34, 51, 0.48));
  margin-bottom: 0.55rem;
  overflow: hidden;
  transition: border-color 0.25s ease, background 0.25s ease;
}

.page-faq .faq-item[open] {
  border-color: var(--cyan-32);
  background: linear-gradient(158deg, rgba(18, 58, 82, 0.86), rgba(10, 34, 51, 0.7));
}

.page-faq .faq-item:target {
  border-color: var(--cyan);
  box-shadow: 0 0 0 2px var(--cyan-18);
}

.page-faq .faq-item > summary {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  padding: 0.85rem 1rem;
  font-size: 0.97rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--sand);
  cursor: pointer;
  list-style: none;
}

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

.page-faq .faq-item > summary::after {
  content: "";
  flex: none;
  width: 8px;
  height: 8px;
  margin-top: 0.34rem;
  margin-left: auto;
  border-right: 1.5px solid var(--cyan);
  border-bottom: 1.5px solid var(--cyan);
  transform: rotate(45deg);
  transition: transform 0.25s ease;
}

.page-faq .faq-item[open] > summary::after {
  transform: rotate(-135deg);
  margin-top: 0.5rem;
}

.page-faq .faq-answer {
  margin: 0 1rem 1rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--cyan-10);
  color: var(--ink-70);
  font-size: 0.92rem;
  line-height: 1.78;
}

.page-faq .faq-answer p {
  margin: 0 0 0.6rem;
}

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

.page-faq .faq-answer strong {
  color: var(--mint);
  font-weight: 600;
}

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

.page-faq .faq-answer ol {
  list-style: none;
  counter-reset: faqstep;
  margin: 0.5rem 0 0.7rem;
  padding: 0;
}

.page-faq .faq-answer ol > li {
  counter-increment: faqstep;
  position: relative;
  padding-left: 1.75rem;
  margin-bottom: 0.42rem;
}

.page-faq .faq-answer ol > li:last-child {
  margin-bottom: 0;
}

.page-faq .faq-answer ol > li::before {
  content: counter(faqstep);
  position: absolute;
  left: 0;
  top: 0.28rem;
  width: 1.15rem;
  height: 1.15rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  line-height: 1;
  color: var(--cyan);
  border: 1px solid var(--cyan-32);
  border-radius: 50%;
}

/* ---------- 联系块 ---------- */
.page-faq .faq-contact {
  margin-top: 1.4rem;
  padding: clamp(1.1rem, 3vw, 1.7rem);
  border: var(--line-strong);
  border-radius: var(--r-lg);
  background: linear-gradient(150deg, rgba(18, 58, 82, 0.85), rgba(5, 19, 31, 0.85));
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-contact-title {
  margin: 0 0 0.5rem;
  font-size: clamp(1.1rem, 2.6vw, 1.35rem);
  color: var(--sand);
  letter-spacing: -0.01em;
}

.page-faq .faq-contact-text {
  margin: 0 0 1rem;
  max-width: 56ch;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--ink-70);
}

.page-faq .faq-contact-list {
  list-style: none;
  margin: 0 0 1.15rem;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.page-faq .faq-contact-list > li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid var(--cyan-10);
}

.page-faq .faq-contact-list > li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-contact-key {
  flex: none;
  min-width: 4.2rem;
  font-size: 0.76rem;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-faq .faq-contact-val {
  font-size: 0.9rem;
  color: var(--sand);
  word-break: break-all;
}

.page-faq .faq-copy {
  margin-left: auto;
  padding: 0.3rem 0.7rem;
  border: var(--line);
  border-radius: var(--r-pill);
  background: transparent;
  color: var(--mint);
  font-family: inherit;
  font-size: 0.76rem;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.page-faq .faq-copy:hover,
.page-faq .faq-copy:focus-visible {
  background: var(--cyan-10);
  border-color: var(--cyan-32);
}

.page-faq .faq-copy[data-copied] {
  color: var(--gold);
  border-color: var(--gold);
}

.page-faq .faq-contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 600px) {
  .page-faq .faq-toc {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-body {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
  }

  .page-faq .faq-toc {
    grid-template-columns: 1fr;
  }

  .page-faq .faq-item > summary {
    padding: 0.95rem 1.15rem;
    font-size: 1rem;
  }

  .page-faq .faq-answer {
    margin: 0 1.15rem 1.1rem;
    font-size: 0.94rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item > summary::after,
  .page-faq .faq-toc-link,
  .page-faq .faq-copy,
  .page-faq .faq-quick a {
    transition: none;
  }
}
<<<END>>>