/* ===== 页面专属CSS：.page-faq ===== */
.page-faq {
  --faq-bg-card: rgba(15, 23, 42, 0.85);
  --faq-border-glow: rgba(57, 255, 20, 0.25);
  --faq-border-orange: rgba(255, 107, 53, 0.4);
  --faq-shadow-glow: 0 0 20px rgba(57, 255, 20, 0.08);
  --faq-radius-card: 16px;
  --faq-radius-sm: 8px;
  --faq-gap: 24px;
  display: flex;
  flex-direction: column;
  gap: 0;
  background: var(--c-primary-dark, #0B1A2E);
  color: var(--c-text-primary, #F1F5F9);
  font-family: var(--font-body, 'Inter', sans-serif);
  padding: 0 0 60px 0;
  position: relative;
  overflow-x: hidden;
}

/* ---- 面包屑 ---- */
.faq-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--c-text-secondary, #94A3B8);
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.faq-breadcrumb a {
  color: var(--c-accent-orange, #FF6B35);
  text-decoration: none;
  transition: color var(--transition, 0.3s);
}
.faq-breadcrumb a:hover,
.faq-breadcrumb a:focus-visible {
  color: var(--c-accent-green, #39FF14);
  text-decoration: underline;
}
.breadcrumb-sep {
  color: var(--c-text-secondary, #94A3B8);
  font-family: var(--font-mono, 'Fira Code', monospace);
}

/* ---- 标题区 ---- */
.faq-hero {
  padding: 100px var(--w-padding, 24px) 40px;
  max-width: var(--w-max, 1280px);
  width: 100%;
  margin: 0 auto;
  position: relative;
}
.faq-hero-title {
  font-family: var(--font-heading, 'Montserrat', sans-serif);
  font-weight: 800;
  font-style: italic;
  font-size: clamp(2.4rem, 8vw, 5rem);
  line-height: 1.05;
  color: var(--c-text-primary, #F1F5F9);
  margin: 0 0 6px 0;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}
.title-dot {
  color: var(--c-accent-green, #39FF14);
  font-family: var(--font-mono, 'Fira Code', monospace);
  font-style: normal;
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}
.faq-hero-desc {
  font-size: clamp(1rem, 2.2vw, 1.25rem);
  color: var(--c-text-secondary, #94A3B8);
  max-width: 640px;
  margin: 0 0 32px 0;
  line-height: 1.6;
}

/* ---- 搜索框 ---- */
.faq-search-wrap {
  position: relative;
  display: flex;
  align-items: center;
  max-width: 580px;
  width: 100%;
  background: var(--faq-bg-card);
  border: 1.5px solid var(--c-text-secondary, #94A3B8);
  border-radius: 60px;
  padding: 0 20px 0 52px;
  transition: border-color var(--transition, 0.3s), box-shadow var(--transition, 0.3s);
  box-shadow: var(--faq-shadow-glow);
}
.search-icon {
  position: absolute;
  left: 20px;
  font-size: 1.4rem;
  color: var(--c-text-secondary, #94A3B8);
  pointer-events: none;
  font-weight: 700;
  transition: color var(--transition, 0.3s);
}
.faq-search-input {
  width: 100%;
  background: transparent;
  border: none;
  outline: none;
  color: var(--c-text-primary, #F1F5F9);
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: 1rem;
  padding: 14px 0;
  line-height: 1.4;
}
.faq-search-input::placeholder {
  color: var(--c-text-secondary, #94A3B8);
  opacity: 0.7;
}
.search-glow {
  position: absolute;
  inset: -3px;
  border-radius: 60px;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition, 0.3s);
  background: radial-gradient(circle at 30% 50%, rgba(57,255,20,0.08), transparent 70%);
}
.faq-search-wrap:focus-within {
  border-color: var(--c-accent-green, #39FF14);
  box-shadow: 0 0 24px rgba(57,255,20,0.15), var(--faq-shadow-glow);
}
.faq-search-wrap:focus-within .search-icon {
  color: var(--c-accent-green, #39FF14);
}
.faq-search-wrap:focus-within .search-glow {
  opacity: 1;
}

/* ---- 分类卡片区 ---- */
.faq-categories {
  max-width: var(--w-max, 1280px);
  width: 100%;
  margin: 0 auto;
  padding: 20px var(--w-padding, 24px) 40px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.faq-categories-visual {
  width: 100%;
  border-radius: var(--faq-radius-card);
  overflow: hidden;
  box-shadow: 0 4px 30px rgba(0,0,0,0.4);
  border: 1px solid rgba(57,255,20,0.08);
}
.faq-cat-img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  aspect-ratio: 800/300;
}
.faq-cat-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
}
.faq-cat-card {
  background: var(--faq-bg-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--faq-radius-card);
  padding: 28px 24px 24px;
  position: relative;
  transition: border-color var(--transition, 0.3s), transform var(--transition, 0.3s), box-shadow var(--transition, 0.3s);
  box-shadow: var(--faq-shadow-glow);
  display: flex;
  flex-direction: column;
}
.faq-cat-card:hover {
  border-color: var(--faq-border-glow);
  transform: translateY(-4px);
  box-shadow: 0 8px 40px rgba(57,255,20,0.06);
}
.faq-cat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 48px;
  border-radius: 0 0 4px 0;
  background: var(--grad-orange, linear-gradient(135deg,#FF6B35,#e85d2c));
  opacity: 0.6;
}
.cat-icon {
  font-size: 2.2rem;
  line-height: 1;
  margin-bottom: 12px;
  color: var(--c-accent-orange, #FF6B35);
  font-family: var(--font-mono, 'Fira Code', monospace);
  font-weight: 700;
}
.cat-title {
  font-family: var(--font-heading, 'Montserrat', sans-serif);
  font-weight: 700;
  font-size: 1.3rem;
  margin: 0 0 8px 0;
  color: var(--c-text-primary, #F1F5F9);
}
.cat-desc {
  color: var(--c-text-secondary, #94A3B8);
  font-size: 0.95rem;
  line-height: 1.6;
  margin: 0 0 16px 0;
  flex: 1;
}
.cat-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--c-accent-green, #39FF14);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  transition: gap var(--transition, 0.3s);
  align-self: flex-start;
}
.cat-link:hover,
.cat-link:focus-visible {
  gap: 10px;
  color: var(--c-accent-orange, #FF6B35);
}
.link-arrow {
  font-family: var(--font-mono, 'Fira Code', monospace);
  font-size: 1.1em;
}

/* ---- 常见问题区 ---- */
.faq-section {
  max-width: var(--w-max, 1280px);
  width: 100%;
  margin: 0 auto;
  padding: 40px var(--w-padding, 24px) 20px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.faq-section-header {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.section-label {
  display: inline-block;
  font-family: var(--font-mono, 'Fira Code', monospace);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-accent-green, #39FF14);
  padding-left: 14px;
  position: relative;
  line-height: 1.4;
}
.section-label::before {
  content: '';
  position: absolute;
  left: 0;
  top: 2px;
  bottom: 2px;
  width: 3px;
  background: var(--c-accent-green, #39FF14);
  border-radius: 2px;
}
.faq-section-title {
  font-family: var(--font-heading, 'Montserrat', sans-serif);
  font-weight: 800;
  font-style: italic;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin: 0;
  color: var(--c-text-primary, #F1F5F9);
}
.faq-section-desc {
  color: var(--c-text-secondary, #94A3B8);
  font-size: 1rem;
  max-width: 600px;
  margin: 0;
}
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: var(--faq-bg-card);
  border: 1px solid rgba(255,255,255,0.05);
  border-radius: var(--faq-radius-sm);
  overflow: hidden;
  transition: border-color var(--transition, 0.3s), box-shadow var(--transition, 0.3s);
  box-shadow: var(--faq-shadow-glow);
}
.faq-item[open] {
  border-color: var(--faq-border-glow);
  box-shadow: 0 4px 24px rgba(57,255,20,0.06);
}
.faq-question {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 20px;
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: background var(--transition, 0.3s);
}
.faq-question::-webkit-details-marker {
  display: none;
}
.faq-question:hover {
  background: rgba(255,255,255,0.02);
}
.faq-q-num {
  font-family: var(--font-mono, 'Fira Code', monospace);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--c-accent-orange, #FF6B35);
  min-width: 32px;
  line-height: 1;
  opacity: 0.8;
}
.faq-q-text {
  flex: 1;
  font-family: var(--font-heading, 'Montserrat', sans-serif);
  font-weight: 600;
  font-size: 1rem;
  color: var(--c-text-primary, #F1F5F9);
  line-height: 1.4;
}
.faq-toggle {
  font-family: var(--font-mono, 'Fira Code', monospace);
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--c-text-secondary, #94A3B8);
  transition: transform var(--transition, 0.3s), color var(--transition, 0.3s);
  line-height: 1;
}
.faq-item[open] .faq-toggle {
  transform: rotate(45deg);
  color: var(--c-accent-green, #39FF14);
}
.faq-answer {
  padding: 0 20px 18px 66px;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--c-text-secondary, #94A3B8);
  animation: faq-fade-in 0.35s ease;
}
@keyframes faq-fade-in {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.faq-answer p {
  margin: 0 0 8px 0;
}
.faq-answer p:last-child {
  margin-bottom: 0;
}
.faq-inline-link {
  color: var(--c-accent-orange, #FF6B35);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition, 0.3s), color var(--transition, 0.3s);
}
.faq-inline-link:hover,
.faq-inline-link:focus-visible {
  color: var(--c-accent-green, #39FF14);
  border-bottom-color: var(--c-accent-green, #39FF14);
}
.data-highlight {
  color: var(--c-accent-green, #39FF14);
  font-family: var(--font-mono, 'Fira Code', monospace);
  font-weight: 500;
}

/* ---- 使用指南区 ---- */
.faq-guide {
  max-width: var(--w-max, 1280px);
  width: 100%;
  margin: 0 auto;
  padding: 20px var(--w-padding, 24px) 40px;
  display: flex;
  flex-direction: column;
  gap: 32px;
}
.faq-guide-content {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.faq-guide-header {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.faq-guide-title {
  font-family: var(--font-heading, 'Montserrat', sans-serif);
  font-weight: 800;
  font-style: italic;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin: 0;
  color: var(--c-text-primary, #F1F5F9);
}
.faq-guide-desc {
  color: var(--c-text-secondary, #94A3B8);
  font-size: 1rem;
  margin: 0;
  max-width: 500px;
}
.guide-steps {
  display: flex;
  flex-direction: column;
  gap: 20px;
  counter-reset: guide-step;
}
.guide-step {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  background: var(--faq-bg-card);
  border: 1px solid rgba(255,255,255,0.04);
  border-radius: var(--faq-radius-sm);
  padding: 20px 22px;
  transition: border-color var(--transition, 0.3s), box-shadow var(--transition, 0.3s);
}
.guide-step:hover {
  border-color: rgba(57,255,20,0.12);
  box-shadow: 0 4px 20px rgba(57,255,20,0.04);
}
.step-num {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading, 'Montserrat', sans-serif);
  font-weight: 800;
  font-style: italic;
  font-size: 1.2rem;
  color: var(--c-accent-orange, #FF6B35);
  background: rgba(255,107,53,0.08);
  border-radius: 50%;
  border: 1.5px solid rgba(255,107,53,0.2);
  line-height: 1;
}
.step-body {
  flex: 1;
  min-width: 0;
}
.step-title {
  font-family: var(--font-heading, 'Montserrat', sans-serif);
  font-weight: 700;
  font-size: 1.1rem;
  margin: 0 0 6px 0;
  color: var(--c-text-primary, #F1F5F9);
}
.step-desc {
  color: var(--c-text-secondary, #94A3B8);
  font-size: 0.92rem;
  line-height: 1.6;
  margin: 0 0 8px 0;
}
.step-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--c-accent-green, #39FF14);
  font-size: 0.88rem;
  font-weight: 500;
  text-decoration: none;
  transition: gap var(--transition, 0.3s);
}
.step-link:hover,
.step-link:focus-visible {
  gap: 8px;
  color: var(--c-accent-orange, #FF6B35);
}
.faq-guide-visual {
  width: 100%;
  border-radius: var(--faq-radius-card);
  overflow: hidden;
  box-shadow: 0 4px 30px rgba(0,0,0,0.4);
  border: 1px solid rgba(57,255,20,0.06);
}
.faq-guide-img {
  width: 100%;
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  aspect-ratio: 600/400;
}

/* ---- 延伸支持区 ---- */
.faq-support {
  max-width: var(--w-max, 1280px);
  width: 100%;
  margin: 0 auto;
  padding: 10px var(--w-padding, 24px) 0;
}
.faq-support-card {
  background: var(--faq-bg-card);
  border: 1px solid rgba(255,107,53,0.12);
  border-radius: var(--faq-radius-card);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  box-shadow: var(--faq-shadow-glow);
  position: relative;
}
.faq-support-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--grad-orange, linear-gradient(135deg,#FF6B35,#e85d2c));
  border-radius: var(--faq-radius-card) var(--faq-radius-card) 0 0;
}
.faq-support-text {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--c-text-secondary, #94A3B8);
  margin: 0;
  max-width: 700px;
}
.faq-support-meta {
  font-size: 0.9rem;
  color: var(--c-text-secondary, #94A3B8);
  margin: 0;
}
.btn-outline.faq-app-link {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border: 1.5px solid var(--c-accent-green, #39FF14);
  border-radius: 40px;
  background: transparent;
  color: var(--c-accent-green, #39FF14);
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  transition: background var(--transition, 0.3s), color var(--transition, 0.3s), box-shadow var(--transition, 0.3s);
  cursor: pointer;
}
.btn-outline.faq-app-link:hover,
.btn-outline.faq-app-link:focus-visible {
  background: var(--c-accent-green, #39FF14);
  color: var(--c-primary-dark, #0B1A2E);
  box-shadow: 0 0 24px rgba(57,255,20,0.25);
}

/* ---- 桌面端媒体查询 ---- */
@media (min-width: 768px) {
  .page-faq {
    --w-padding: 40px;
  }
  .faq-hero {
    padding-top: 120px;
    padding-bottom: 50px;
  }
  .faq-cat-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .faq-section {
    padding-top: 50px;
  }
  .faq-question {
    padding: 18px 28px;
  }
  .faq-answer {
    padding-left: 74px;
    padding-right: 28px;
    padding-bottom: 22px;
  }
  .faq-guide {
    flex-direction: row;
    align-items: flex-start;
    gap: 40px;
  }
  .faq-guide-content {
    flex: 1;
    min-width: 0;
  }
  .faq-guide-visual {
    flex: 0 0 360px;
    max-width: 420px;
    position: sticky;
    top: 100px;
  }
  .guide-step {
    padding: 22px 28px;
  }
  .faq-support-card {
    padding: 36px 40px;
  }
}

@media (min-width: 1024px) {
  .page-faq {
    --w-padding: 48px;
  }
  .faq-hero-title {
    font-size: 4.8rem;
  }
  .faq-guide-visual {
    flex-basis: 420px;
  }
  .faq-cat-card {
    padding: 32px 28px 28px;
  }
}

/* ---- 窄屏安全 ---- */
@media (max-width: 480px) {
  .faq-hero {
    padding-top: 80px;
    padding-left: 16px;
    padding-right: 16px;
  }
  .faq-categories {
    padding-left: 16px;
    padding-right: 16px;
  }
  .faq-section {
    padding-left: 16px;
    padding-right: 16px;
  }
  .faq-guide {
    padding-left: 16px;
    padding-right: 16px;
  }
  .faq-support {
    padding-left: 16px;
    padding-right: 16px;
  }
  .faq-q-num {
    min-width: 24px;
    font-size: 0.75rem;
  }
  .faq-answer {
    padding-left: 38px;
  }
  .faq-cat-card {
    padding: 20px 18px;
  }
  .guide-step {
    padding: 16px 16px;
    gap: 14px;
  }
  .step-num {
    width: 36px;
    height: 36px;
    font-size: 1rem;
  }
}
</style>
```