.page-faq {
  --faq-nav-w: 220px;
  --faq-deco-color: rgba(255, 102, 0, 0.15);
  --faq-glow-orange: 0 0 12px rgba(255, 102, 0, 0.3);
  --faq-glow-purple: 0 0 12px rgba(139, 92, 246, 0.25);
  display: block;
  max-width: var(--max-w, 1200px);
  margin: 0 auto;
  padding: var(--gap-md, 16px) var(--gap-md, 16px) var(--gap-xl, 40px);
  color: var(--color-text-primary, #E5E7EB);
  font-family: var(--font-body, 'Inter', sans-serif);
  position: relative;
}

/* ===== 面包屑 ===== */
.faq-breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8125rem;
  color: var(--color-text-muted, #6B7280);
  margin-bottom: var(--gap-lg, 32px);
  padding: 6px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.faq-breadcrumb a {
  color: var(--color-primary, #FF6600);
  text-decoration: none;
  transition: color var(--transition-fast, 0.2s ease);
}
.faq-breadcrumb a:hover,
.faq-breadcrumb a:focus-visible {
  color: var(--color-primary-hover, #FF8533);
  outline: 2px solid var(--color-primary, #FF6600);
  outline-offset: 2px;
}
.bc-sep {
  color: var(--color-text-muted, #6B7280);
}
.bc-current {
  color: var(--color-text-secondary, #9CA3AF);
}

/* ===== 标题区 ===== */
.faq-hero {
  position: relative;
  margin-bottom: var(--gap-xl, 40px);
  padding: var(--gap-lg, 32px) 0;
  border-bottom: 2px solid var(--color-bg-light, #1E2450);
}
.hero-deco {
  position: absolute;
  top: 0;
  right: 0;
  width: 180px;
  height: 180px;
  background: var(--color-accent-gradient, linear-gradient(135deg, #8B5CF6, #FF6600));
  opacity: 0.08;
  clip-path: polygon(100% 0, 0 0, 100% 100%);
  pointer-events: none;
}
.faq-headline {
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: 800;
  font-size: clamp(1.75rem, 4.5vw, 2.75rem);
  color: var(--color-white, #FFFFFF);
  margin: 0 0 8px;
  letter-spacing: -0.02em;
  position: relative;
  display: inline-block;
}
.faq-headline::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--color-primary, #FF6600);
  margin-top: 8px;
  clip-path: polygon(0 0, 100% 0, 90% 100%, 0 100%);
}
.faq-subtitle {
  font-size: 1rem;
  color: var(--color-text-secondary, #9CA3AF);
  margin: 4px 0 var(--gap-md, 16px);
  max-width: 560px;
  line-height: 1.5;
}

/* ===== 搜索框 ===== */
.faq-search-wrap {
  position: relative;
  max-width: 480px;
  margin-top: var(--gap-md, 16px);
}
.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.25rem;
  color: var(--color-primary, #FF6600);
  pointer-events: none;
  font-weight: 700;
}
.faq-search-input {
  width: 100%;
  padding: 12px 16px 12px 44px;
  background: var(--color-bg-medium, #151A3A);
  border: 2px solid var(--color-bg-light, #1E2450);
  border-radius: var(--radius-md, 8px);
  color: var(--color-text-primary, #E5E7EB);
  font-size: 0.9375rem;
  font-family: var(--font-body, 'Inter', sans-serif);
  transition: border-color var(--transition-fast, 0.2s ease), box-shadow var(--transition-fast, 0.2s ease);
  box-shadow: 0 0 0 0 transparent;
  outline: none;
}
.faq-search-input::placeholder {
  color: var(--color-text-muted, #6B7280);
}
.faq-search-input:focus {
  border-color: var(--color-primary, #FF6600);
  box-shadow: 0 0 0 3px rgba(255, 102, 0, 0.2), var(--faq-glow-orange);
}

/* ===== 主布局 ===== */
.faq-layout {
  display: flex;
  flex-direction: column;
  gap: var(--gap-lg, 32px);
}

/* ===== 导航 ===== */
.faq-nav {
  order: -1;
  background: var(--color-bg-medium, #151A3A);
  border-radius: var(--radius-md, 8px);
  padding: var(--gap-md, 16px);
  border: 1px solid rgba(255, 102, 0, 0.12);
  position: relative;
  overflow: hidden;
}
.faq-nav::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--color-accent-gradient, linear-gradient(135deg, #8B5CF6, #FF6600));
  opacity: 0.6;
}
.nav-title {
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: 700;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted, #6B7280);
  margin: 0 0 12px;
  padding-left: 8px;
}
.nav-list-faq {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.nav-link-faq {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: var(--radius-sm, 4px);
  color: var(--color-text-secondary, #9CA3AF);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.875rem;
  background: transparent;
  border: 1px solid transparent;
  transition: all var(--transition-fast, 0.2s ease);
  white-space: nowrap;
}
.nav-link-faq .nav-indicator {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-bg-light, #1E2450);
  transition: background var(--transition-fast, 0.2s ease);
}
.nav-link-faq:hover,
.nav-link-faq:focus-visible {
  color: var(--color-primary, #FF6600);
  border-color: rgba(255, 102, 0, 0.25);
  background: rgba(255, 102, 0, 0.06);
}
.nav-link-faq:hover .nav-indicator,
.nav-link-faq:focus-visible .nav-indicator {
  background: var(--color-primary, #FF6600);
}
.nav-link-faq:focus-visible {
  outline: 2px solid var(--color-primary, #FF6600);
  outline-offset: 2px;
}
.nav-deco-line {
  display: none;
}

/* ===== 内容区 ===== */
.faq-content {
  display: flex;
  flex-direction: column;
  gap: var(--gap-xl, 40px);
}

/* ===== 分类区块 ===== */
.faq-section {
  background: var(--color-bg-medium, #151A3A);
  border-radius: var(--radius-md, 8px);
  padding: var(--gap-lg, 32px) var(--gap-md, 16px);
  border: 1px solid rgba(255, 255, 255, 0.04);
  position: relative;
  transition: box-shadow var(--transition-med, 0.35s ease);
}
.faq-section:hover {
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}
.section-heading-faq {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-heading, 'Inter', sans-serif);
  font-weight: 700;
  font-size: clamp(1.1rem, 2.5vw, 1.35rem);
  color: var(--color-white, #FFFFFF);
  margin: 0 0 var(--gap-md, 16px);
  padding-bottom: 12px;
  border-bottom: 2px solid rgba(255, 102, 0, 0.2);
  position: relative;
}
.section-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm, 4px);
  object-fit: contain;
  background: var(--color-bg-dark, #0B1026);
  padding: 4px;
  box-shadow: 0 0 0 2px rgba(255, 102, 0, 0.15);
}
.heading-text {
  flex: 1;
}
.heading-shine {
  display: none;
  width: 80px;
  height: 2px;
  background: var(--color-accent-gradient, linear-gradient(135deg, #8B5CF6, #FF6600));
  border-radius: 2px;
  opacity: 0.5;
}

/* ===== 折叠面板 ===== */
.faq-items {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.faq-item {
  background: var(--color-bg-dark, #0B1026);
  border-radius: var(--radius-sm, 4px);
  border: 1px solid rgba(255, 255, 255, 0.05);
  overflow: hidden;
  transition: border-color var(--transition-fast, 0.2s ease);
}
.faq-item[open] {
  border-color: rgba(255, 102, 0, 0.2);
}
.faq-item:hover {
  border-color: rgba(255, 102, 0, 0.12);
}
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--color-text-primary, #E5E7EB);
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: background var(--transition-fast, 0.2s ease), color var(--transition-fast, 0.2s ease);
  position: relative;
}
.faq-q::-webkit-details-marker {
  display: none;
}
.faq-q::marker {
  display: none;
  content: '';
}
.faq-q:hover {
  background: rgba(255, 102, 0, 0.04);
  color: var(--color-white, #FFFFFF);
}
.faq-q:focus-visible {
  outline: 2px solid var(--color-primary, #FF6600);
  outline-offset: -2px;
  background: rgba(255, 102, 0, 0.06);
}
.q-toggle {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  position: relative;
  transition: transform var(--transition-fast, 0.2s ease);
}
.q-toggle::before,
.q-toggle::after {
  content: '';
  position: absolute;
  background: var(--color-primary, #FF6600);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: transform var(--transition-fast, 0.2s ease);
}
.q-toggle::before {
  width: 2px;
  height: 12px;
}
.q-toggle::after {
  width: 12px;
  height: 2px;
}
.faq-item[open] .q-toggle::before {
  transform: translate(-50%, -50%) rotate(90deg);
}
.faq-item[open] .q-toggle::before,
.faq-item[open] .q-toggle::after {
  background: var(--color-primary-hover, #FF8533);
}

.faq-a {
  padding: 0 16px 16px;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.4s ease, opacity 0.35s ease, padding 0.35s ease;
}
.faq-item[open] .faq-a {
  max-height: 800px;
  opacity: 1;
  padding: 0 16px 20px;
}
.faq-a p {
  margin: 0 0 10px;
  line-height: 1.6;
  font-size: 0.9rem;
  color: var(--color-text-secondary, #9CA3AF);
}
.faq-a p:last-child {
  margin-bottom: 0;
}
.faq-a ul,
.faq-a ol {
  margin: 0 0 10px;
  padding-left: 20px;
  line-height: 1.6;
  font-size: 0.9rem;
  color: var(--color-text-secondary, #9CA3AF);
}
.faq-a li {
  margin-bottom: 4px;
}
.faq-a a {
  color: var(--color-primary, #FF6600);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition-fast, 0.2s ease);
}
.faq-a a:hover,
.faq-a a:focus-visible {
  color: var(--color-primary-hover, #FF8533);
}
.faq-a strong {
  color: var(--color-white, #FFFFFF);
  font-weight: 600;
}

/* ===== 流程示意图 ===== */
.faq-flow-img {
  margin-top: 14px;
  border-radius: var(--radius-md, 8px);
  overflow: hidden;
  border: 1px solid rgba(255, 102, 0, 0.15);
  background: var(--color-bg-dark, #0B1026);
  box-shadow: var(--faq-glow-orange);
}
.faq-flow-img img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ===== 桌面端 ≥ 768px ===== */
@media (min-width: 768px) {
  .page-faq {
    padding: var(--gap-lg, 32px) var(--gap-lg, 32px) var(--gap-xl, 40px);
  }
  .faq-layout {
    flex-direction: row;
    gap: var(--gap-lg, 32px);
  }
  .faq-nav {
    order: 0;
    flex: 0 0 var(--faq-nav-w, 220px);
    align-self: flex-start;
    position: sticky;
    top: calc(var(--header-h, 56px) + 16px);
    padding: var(--gap-md, 16px) var(--gap-sm, 8px);
  }
  .faq-nav::before {
    width: 3px;
  }
  .nav-list-faq {
    flex-direction: column;
    gap: 2px;
  }
  .nav-link-faq {
    padding: 10px 12px;
    white-space: normal;
    border-left: 3px solid transparent;
    border-radius: 0 var(--radius-sm, 4px) var(--radius-sm, 4px) 0;
  }
  .nav-link-faq:hover,
  .nav-link-faq:focus-visible {
    border-left-color: var(--color-primary, #FF6600);
    background: rgba(255, 102, 0, 0.06);
  }
  .nav-deco-line {
    display: block;
    height: 1px;
    background: linear-gradient(90deg, rgba(255, 102, 0, 0.3), transparent);
    margin-top: 14px;
  }
  .faq-content {
    flex: 1;
    min-width: 0;
  }
  .faq-section {
    padding: var(--gap-lg, 32px);
  }
  .heading-shine {
    display: block;
  }
  .faq-headline::after {
    width: 80px;
  }
}

/* ===== 大桌面端 ≥ 1024px ===== */
@media (min-width: 1024px) {
  .faq-nav {
    --faq-nav-w: 240px;
    padding: var(--gap-lg, 32px) var(--gap-md, 16px);
  }
  .faq-section {
    padding: var(--gap-xl, 40px);
  }
  .faq-q {
    padding: 16px 20px;
    font-size: 0.975rem;
  }
  .faq-a {
    padding: 0 20px 16px;
  }
  .faq-item[open] .faq-a {
    padding: 0 20px 24px;
  }
}

/* ===== 极窄屏微调 ===== */
@media (max-width: 400px) {
  .faq-headline {
    font-size: 1.35rem;
  }
  .faq-subtitle {
    font-size: 0.85rem;
  }
  .faq-section {
    padding: var(--gap-md, 16px) 12px;
  }
  .section-heading-faq {
    font-size: 1rem;
    gap: 8px;
  }
  .section-icon {
    width: 32px;
    height: 32px;
  }
  .faq-q {
    padding: 12px;
    font-size: 0.85rem;
  }
  .faq-a {
    padding: 0 12px 12px;
  }
  .faq-item[open] .faq-a {
    padding: 0 12px 16px;
  }
}