.page-faq {
  --faq-rail: 236px;
  --faq-card: rgba(18, 36, 69, 0.55);
  background:
    radial-gradient(circle at 88% -6%, rgba(56, 232, 210, 0.08), transparent 52%),
    var(--ink-900);
  color: var(--paper);
  padding-bottom: clamp(56px, 8vw, 96px);
}

.page-faq a:focus-visible,
.page-faq summary:focus-visible,
.page-faq .check-box:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumb {
  padding: clamp(16px, 3vw, 28px) 0 0;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  display: grid;
  gap: 16px;
  padding: clamp(18px, 3.4vw, 34px) 0 clamp(26px, 4.4vw, 44px);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-hero h1 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.16;
  font-size: clamp(28px, 5.2vw, 50px);
  max-width: 18em;
}

.page-faq .faq-lede {
  margin: 0;
  max-width: 48em;
  font-family: var(--font-body);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-jump {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-faq .faq-jump a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--line);
  background: rgba(18, 36, 69, 0.6);
  color: var(--paper);
  text-decoration: none;
  font-family: var(--font-head);
  font-size: 13.5px;
  font-weight: 700;
  box-shadow: 3px 3px 0 rgba(4, 9, 20, 0.4);
  transition: border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.page-faq .faq-jump a:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: translateY(-2px);
}

.page-faq .jump-index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--cyan-dim);
}

/* ---------- 双栏骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
  padding-top: clamp(24px, 4vw, 44px);
}

/* ---------- 左侧问题索引 ---------- */
.page-faq .faq-rail {
  border: 1px solid var(--line);
  background: var(--ink-850);
  padding: 16px 16px 18px;
  box-shadow: var(--shadow-paper);
}

.page-faq .rail-kicker {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: row;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
}

.page-faq .rail-list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 8px 10px;
  white-space: nowrap;
  color: var(--mist);
  text-decoration: none;
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 700;
  border-bottom: 2px solid transparent;
  transition: color 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.page-faq .rail-list a:hover,
.page-faq .rail-list a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--cyan);
  background: rgba(56, 232, 210, 0.07);
}

.page-faq .rail-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan-dim);
}

.page-faq .rail-note {
  margin: 14px 0 12px;
  font-family: var(--font-body);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--mist);
}

.page-faq .rail-cta {
  display: inline-block;
  padding: 9px 16px;
  border: 1px solid var(--coral);
  color: var(--coral);
  text-decoration: none;
  font-family: var(--font-head);
  font-size: 13.5px;
  font-weight: 700;
  transition: background 0.2s ease, color 0.2s ease;
}

.page-faq .rail-cta:hover {
  background: var(--coral);
  color: var(--ink-900);
}

/* ---------- 区块通用 ---------- */
.page-faq .faq-block {
  scroll-margin-top: 96px;
  padding-bottom: clamp(26px, 4vw, 42px);
  margin-bottom: clamp(26px, 4vw, 42px);
  border-bottom: 1px dashed var(--line-soft);
}

.page-faq .faq-block:last-of-type {
  border-bottom: 0;
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-faq .block-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 4px 12px;
  margin-bottom: 18px;
}

.page-faq .block-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  padding: 3px 7px;
  background: var(--cyan);
  color: var(--ink-900);
}

.page-faq .block-head h2 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.25;
  font-size: clamp(20px, 2.6vw, 27px);
}

.page-faq .block-sub {
  grid-column: 2;
  margin: 0;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 问答手风琴 ---------- */
.page-faq .faq-block {
  counter-reset: qa;
}

.page-faq .qa {
  margin-bottom: 12px;
  border: 1px solid var(--line);
  background: var(--faq-card);
  box-shadow: var(--shadow-paper);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-faq .qa[open] {
  box-shadow: var(--shadow-paper-lift);
  border-color: var(--line);
}

.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
}

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

.page-faq .qa summary::before {
  counter-increment: qa;
  content: counter(qa, decimal-leading-zero);
  flex: none;
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan-dim);
}

.page-faq .qa summary::after {
  content: "+";
  flex: none;
  margin-left: auto;
  padding-top: 1px;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
}

.page-faq .qa[open] summary::after {
  content: "\2212";
}

.page-faq .qa summary:hover {
  background: rgba(56, 232, 210, 0.05);
}

.page-faq .qa summary h3 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  letter-spacing: -0.005em;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.55;
  color: var(--paper);
}

.page-faq .qa[open] summary h3 {
  color: var(--cyan);
}

.page-faq .qa-body {
  padding: 0 16px 18px 46px;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .qa-body p {
  margin: 0 0 10px;
}

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

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

.page-faq .qa-body a:hover {
  color: var(--coral-soft);
}

.page-faq .qa-body strong {
  color: var(--paper);
  font-weight: 600;
}

.page-faq .mono {
  font-family: var(--font-mono);
  font-size: 0.86em;
  color: var(--paper);
  word-break: break-all;
}

/* ---------- 路径对照 ---------- */
.page-faq .faq-block--compare {
  padding: clamp(18px, 3vw, 28px);
  margin-bottom: clamp(26px, 4vw, 42px);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(18, 36, 69, 0.92), rgba(10, 21, 38, 0.92));
  box-shadow: var(--shadow-paper);
}

.page-faq .compare-figure {
  margin: 0 0 20px;
  border: 1px solid var(--line);
  background: var(--ink-800);
}

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

.page-faq .table-scroll {
  overflow-x: auto;
  border: 1px solid var(--line-soft);
}

.page-faq .path-table {
  width: 100%;
  min-width: 550px;
  border-collapse: collapse;
  font-family: var(--font-body);
  font-size: 14px;
}

.page-faq .path-table th,
.page-faq .path-table td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .path-table tbody tr:last-child th,
.page-faq .path-table tbody tr:last-child td {
  border-bottom: 0;
}

.page-faq .path-table thead th {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cyan);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

.page-faq .path-table tbody th {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 14px;
  color: var(--paper);
}

.page-faq .path-table td {
  color: var(--mist);
  line-height: 1.7;
}

.page-faq .path-table .num {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--coral);
  line-height: 1.2;
}

/* ---------- 平板插图 ---------- */
.page-faq .device-figure {
  margin: 0 0 20px;
  border: 1px solid var(--line);
  background: var(--ink-800);
  box-shadow: var(--shadow-paper);
}

/* ---------- 检查清单 ---------- */
.page-faq .checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-faq .check-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 14px;
  background: var(--faq-card);
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--coral);
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
  cursor: pointer;
  transition: border-color 0.18s ease, background 0.18s ease;
}

.page-faq .check-item:hover {
  background: rgba(56, 232, 210, 0.06);
}

.page-faq .check-item:has(.check-box:checked) {
  border-left-color: var(--mint);
}

.page-faq .check-box {
  appearance: none;
  -webkit-appearance: none;
  flex: none;
  width: 20px;
  height: 20px;
  margin: 3px 0 0;
  border: 1px solid var(--line);
  background: var(--ink-800);
  position: relative;
  cursor: pointer;
  transition: background 0.18s ease, border-color 0.18s ease;
}

.page-faq .check-box:checked {
  background: var(--mint);
  border-color: var(--mint);
}

.page-faq .check-box:checked::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 1px;
  width: 6px;
  height: 12px;
  border-right: 2px solid var(--ink-900);
  border-bottom: 2px solid var(--ink-900);
  transform: rotate(40deg);
}

.page-faq .check-text strong {
  color: var(--paper);
  font-family: var(--font-head);
  font-weight: 700;
}

/* ---------- 结尾行动区 ---------- */
.page-faq .faq-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid var(--line);
  border-left: 4px solid var(--coral);
  background: rgba(255, 106, 69, 0.08);
  box-shadow: var(--shadow-paper);
}

.page-faq .faq-cta-text {
  flex: 1 1 260px;
  margin: 0;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper);
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: clamp(32px, 4vw, 56px);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 92px;
  }

  .page-faq .rail-list {
    flex-direction: column;
    overflow-x: visible;
    gap: 2px;
    padding-bottom: 0;
  }

  .page-faq .rail-list a {
    white-space: normal;
    border-bottom: 0;
    border-left: 2px solid transparent;
    padding: 8px 8px;
  }

  .page-faq .rail-list a:hover,
  .page-faq .rail-list a:focus-visible {
    border-left-color: var(--cyan);
    border-bottom-color: transparent;
  }

  .page-faq .qa-body {
    padding-left: 52px;
    padding-right: 24px;
  }

  .page-faq .qa summary {
    padding: 16px 22px;
  }
}

@media (max-width: 560px) {
  .page-faq .block-head {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

  .page-faq .block-sub {
    grid-column: 1;
  }

  .page-faq .qa-body {
    padding-left: 16px;
  }

  .page-faq .faq-cta {
    flex-direction: column;
    align-items: stretch;
  }

  .page-faq .faq-cta .btn {
    width: 100%;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-jump a,
  .page-faq .qa,
  .page-faq .check-item,
  .page-faq .rail-list a,
  .page-faq .rail-cta {
    transition: none;
  }

  .page-faq .faq-jump a:hover {
    transform: none;
  }
}
<<<END>>>