.page-faq {
  --faq-rail: 300px;
  --qa-bg: rgba(255, 255, 255, 0.68);
  background-color: var(--paper);
  background-image:
    radial-gradient(circle at 100% 0%, rgba(154, 217, 228, 0.24), transparent 42%),
    linear-gradient(180deg, var(--haze) 0%, transparent 360px);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
}

.page-faq h1,
.page-faq h2,
.page-faq h3 {
  margin: 0;
  font-family: var(--font-display);
  line-height: 1.16;
  letter-spacing: -0.03em;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: clamp(20px, 4vw, 34px) 0 clamp(40px, 6vw, 76px);
  background:
    radial-gradient(circle at 84% 6%, rgba(43, 240, 196, 0.15), transparent 52%),
    radial-gradient(circle at 4% 94%, rgba(14, 116, 144, 0.48), transparent 48%),
    linear-gradient(165deg, var(--ink) 0%, var(--ink-2) 62%, var(--ink-3) 100%);
  border-bottom: 1px solid var(--line-strong);
  color: var(--paper);
}

.page-faq .faq-hero-inner {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  align-items: center;
}

.page-faq .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-faq .breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: 8px;
  opacity: 0.55;
}

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

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

.page-faq .breadcrumb li[aria-current] {
  color: var(--paper);
}

.page-faq .faq-hero-copy .eyebrow {
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  color: var(--coral);
}

.page-faq .faq-hero h1 {
  margin-top: 10px;
  font-size: clamp(30px, 5.2vw, 50px);
  font-weight: 800;
  color: var(--paper);
}

.page-faq .faq-hero-lead {
  max-width: 46ch;
  margin: 16px 0 0;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(244, 239, 228, 0.84);
}

.page-faq .faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 28px);
}

.page-faq .faq-hero-actions .btn {
  flex: 1 1 180px;
  min-height: 48px;
}

.page-faq .faq-hero-actions .btn-outline {
  color: var(--paper);
  border-color: var(--line-strong);
  background: rgba(154, 217, 228, 0.06);
}

.page-faq .faq-hero-actions .btn-outline:hover,
.page-faq .faq-hero-actions .btn-outline:focus-visible {
  color: var(--ink);
  border-color: var(--neon);
  background: var(--neon);
}

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(24px, 4vw, 34px) 0 0;
  padding: 1px;
  background: var(--line-strong);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-faq .faq-stats > div {
  padding: 12px 14px;
  background: rgba(6, 24, 38, 0.78);
}

.page-faq .faq-stats dt {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist);
}

.page-faq .faq-stats dd {
  margin: 4px 0 0;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--neon);
}

/* ---------- 图片容器 ---------- */
.page-faq .faq-figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: linear-gradient(140deg, rgba(14, 116, 144, 0.55), rgba(6, 24, 38, 0.95));
  box-shadow: var(--shadow-2);
}

.page-faq .faq-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(transparent 56%, rgba(6, 24, 38, 0.5));
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .device-figure img {
  aspect-ratio: 4 / 3;
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-body {
  padding: clamp(36px, 6vw, 72px) 0 clamp(48px, 7vw, 88px);
}

.page-faq .faq-layout {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

.page-faq .faq-rail-sticky {
  display: grid;
  gap: 18px;
}

.page-faq .faq-rail-title {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--rock);
}

.page-faq .faq-toc ol {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-toc a {
  display: flex;
  align-items: baseline;
  gap: 12px;
  min-height: 44px;
  padding: 10px 12px;
  border-left: 2px solid transparent;
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: background-color 0.16s ease, border-color 0.16s ease, color 0.16s ease;
}

.page-faq .faq-toc a:hover,
.page-faq .faq-toc a:focus-visible {
  border-left-color: var(--coral);
  background: rgba(154, 217, 228, 0.32);
  color: var(--teal-dark);
}

.page-faq .faq-toc-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--teal);
}

/* ---------- 左侧路径卡 ---------- */
.page-faq .path-card {
  padding: 18px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: linear-gradient(158deg, var(--ink) 0%, var(--ink-3) 100%);
  color: var(--paper);
  box-shadow: var(--shadow-2);
}

.page-faq .path-card-title {
  margin: 0 0 14px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-faq .path-steps {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .path-steps li {
  position: relative;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
}

.page-faq .path-steps li + li::before {
  content: "";
  position: absolute;
  left: 16px;
  top: -16px;
  width: 1px;
  height: 16px;
  background: linear-gradient(var(--neon), var(--coral));
}

.page-faq .path-num {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--neon);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.page-faq .path-card strong {
  display: block;
  font-family: var(--font-display);
  font-size: 15px;
  letter-spacing: -0.01em;
}

.page-faq .path-card em {
  display: block;
  margin-top: 2px;
  font-style: normal;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 章节 ---------- */
.page-faq .faq-block {
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-faq .faq-block + .faq-block {
  margin-top: clamp(40px, 6vw, 72px);
}

.page-faq .faq-block-head {
  display: grid;
  gap: 8px;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-dark);
}

.page-faq .faq-block-num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--coral);
}

.page-faq .faq-block-head h2 {
  font-size: clamp(23px, 3vw, 32px);
  font-weight: 800;
}

.page-faq .faq-block-lead {
  max-width: 60ch;
  margin: 0;
  font-size: 15px;
  color: var(--rock);
}

/* ---------- 编号步骤 ---------- */
.page-faq .step-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .step-list li {
  padding: 16px 18px;
  border: 1px solid var(--line-dark);
  border-left: 3px solid var(--teal);
  border-radius: var(--radius);
  background: var(--qa-bg);
  box-shadow: var(--shadow-1);
}

.page-faq .step-list li:nth-child(2) {
  border-left-color: var(--coral);
}

.page-faq .step-num {
  display: inline-block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--teal-dark);
}

.page-faq .step-list h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
}

.page-faq .step-list p {
  margin: 0;
  font-size: 15px;
  color: var(--rock);
}

.page-faq .faq-example {
  margin-top: 16px;
  padding: 14px 16px;
  border: 1px dashed var(--line-dark-strong);
  border-radius: var(--radius);
  background: rgba(154, 217, 228, 0.28);
  font-size: 14px;
  color: var(--ink-3);
}

.page-faq .faq-example p {
  margin: 0 0 6px;
}

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

.page-faq .faq-example strong {
  color: var(--clay-ink);
}

/* ---------- 设备分栏 ---------- */
.page-faq .device-split {
  display: grid;
  gap: 18px;
}

/* ---------- 问答手风琴 ---------- */
.page-faq .qa-stack {
  display: grid;
  gap: 10px;
}

.page-faq .qa {
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  background: var(--qa-bg);
  box-shadow: var(--shadow-1);
  overflow: hidden;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.page-faq .qa[open] {
  border-color: var(--line-dark-strong);
  box-shadow: var(--shadow-2);
}

.page-faq .qa summary {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  min-height: 44px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
  transition: color 0.16s ease, background-color 0.16s ease;
}

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

.page-faq .qa summary::after {
  content: "+";
  flex: none;
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.2;
  color: var(--teal);
}

.page-faq .qa[open] summary::after {
  content: "−";
  color: var(--coral);
}

.page-faq .qa summary:hover {
  color: var(--teal-dark);
  background: rgba(214, 230, 234, 0.5);
}

.page-faq .qa summary:focus-visible {
  outline: 2px solid var(--coral);
  outline-offset: -2px;
}

.page-faq .qa-idx {
  flex: none;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--rock);
}

.page-faq .qa-q {
  min-width: 0;
}

.page-faq .qa-body {
  padding: 10px 16px 18px;
  border-top: 1px dashed var(--line-dark);
  background: rgba(214, 230, 234, 0.42);
}

.page-faq .qa-body p,
.page-faq .qa-body ul,
.page-faq .qa-body ol {
  margin: 0 0 8px;
  font-size: 15px;
  color: var(--ink-3);
}

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

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

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

/* ---------- 区间选择 ---------- */
.page-faq .range-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
}

.page-faq .range-grid li {
  display: grid;
  gap: 2px;
  padding: 12px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: linear-gradient(150deg, var(--ink-2), var(--ink-3));
  color: var(--paper);
}

.page-faq .range-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 22px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--neon);
}

.page-faq .range-grid li:nth-child(even) .range-num {
  color: var(--coral);
}

.page-faq .range-num--word {
  font-size: 14px;
  letter-spacing: 0.04em;
}

.page-faq .range-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--mist);
}

.page-faq .range-desc {
  font-size: 12px;
  line-height: 1.55;
  color: rgba(244, 239, 228, 0.66);
}

/* ---------- 联系方式 ---------- */
.page-faq .support-grid {
  display: grid;
  gap: 12px;
}

.page-faq .support-card {
  display: grid;
  gap: 4px;
  padding: 16px;
  border: 1px solid var(--line-dark-strong);
  border-top: 3px solid var(--teal);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow-1);
}

.page-faq .support-card--alt {
  border-top-color: var(--coral);
}

.page-faq .support-label {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--rock);
}

.page-faq .support-value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  word-break: break-all;
}

.page-faq .support-hint {
  margin: 0;
  font-size: 13px;
  color: var(--rock);
}

.page-faq .support-note {
  margin: 12px 0 18px;
  padding: 12px 14px;
  border-left: 3px solid var(--neon);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: rgba(6, 24, 38, 0.06);
  font-size: 14px;
  color: var(--ink-3);
}

/* ---------- 底部去向 ---------- */
.page-faq .faq-next {
  margin-top: clamp(36px, 5vw, 56px);
  padding: 20px;
  border: 1px solid var(--line-dark-strong);
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(154, 217, 228, 0.42), rgba(244, 239, 228, 0.92));
}

.page-faq .faq-next-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-faq .faq-next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.page-faq .faq-next-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--line-dark-strong);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: border-color 0.16s ease, color 0.16s ease, background-color 0.16s ease;
}

.page-faq .faq-next-links a:hover,
.page-faq .faq-next-links a:focus-visible {
  border-color: var(--teal);
  background: var(--teal);
  color: var(--paper);
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .range-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-faq .support-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-inner {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
  }

  .page-faq .faq-hero-actions .btn {
    flex: 0 0 auto;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
  }

  .page-faq .faq-rail-sticky {
    position: sticky;
    top: calc(var(--header-h) + 18px);
  }
}

@media (min-width: 1100px) {
  .page-faq .device-split {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .page-faq .qa[open] .qa-body {
    animation: faq-reveal 0.2s ease-out both;
  }
}

@keyframes faq-reveal {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}
<<<END>>>