.page-faq {
  --faq-sidebar-width: 200px;
  --faq-card-bg: rgba(245, 242, 237, 0.55);
  --faq-border-color: var(--color-border-subtle, #D1CEC6);
  --faq-accent-line: var(--color-accent-gold, #F5A623);
  max-width: var(--max-width, 1280px);
  margin: 0 auto;
  padding: var(--spacing-lg, 2rem) var(--spacing-md, 1.5rem) var(--spacing-xl, 3rem);
  font-family: var(--font-body, 'Noto Serif SC', serif);
  color: var(--color-text, #1A1A1A);
  background: var(--color-bg-light, #F5F2ED);
}

/* ── 面包屑 ── */
.page-faq .faq-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs, 0.5rem);
  font-size: var(--size-small, 0.75rem);
  font-family: var(--font-accent, 'Noto Sans SC', sans-serif);
  color: var(--color-primary, #1A3B5C);
  margin-bottom: var(--spacing-md, 1.5rem);
  opacity: 0.75;
}
.page-faq .faq-breadcrumb a {
  color: var(--color-primary, #1A3B5C);
  text-decoration: none;
  transition: color 0.2s;
}
.page-faq .faq-breadcrumb a:hover,
.page-faq .faq-breadcrumb a:focus-visible {
  color: var(--color-accent-gold, #F5A623);
  text-decoration: underline;
}
.page-faq .faq-breadcrumb-sep {
  color: var(--faq-border-color);
  user-select: none;
}
.page-faq .faq-breadcrumb [aria-current="page"] {
  color: var(--color-text, #1A1A1A);
  font-weight: 600;
}

/* ── 标题区 ── */
.page-faq .faq-hero {
  display: flex;
  align-items: center;
  gap: var(--spacing-md, 1.5rem);
  margin-bottom: var(--spacing-xl, 3rem);
  padding-bottom: var(--spacing-md, 1.5rem);
  border-bottom: 2px solid var(--faq-border-color);
}
.page-faq .faq-hero-icon {
  flex-shrink: 0;
  width: 80px;
  height: 80px;
  object-fit: contain;
  display: block;
}
.page-faq .faq-hero-text {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-sm, 1rem);
}
.page-faq .faq-hero-heading {
  font-family: var(--font-heading, 'Noto Sans SC', sans-serif);
  font-size: var(--size-title, 2.5rem);
  font-weight: 700;
  color: var(--color-primary, #1A3B5C);
  margin: 0;
  line-height: 1.2;
}
.page-faq .faq-hero-annotation {
  font-family: var(--font-accent, 'Noto Sans SC', sans-serif);
  font-size: var(--size-small, 0.75rem);
  font-weight: 300;
  color: var(--color-primary, #1A3B5C);
  writing-mode: vertical-rl;
  letter-spacing: 0.15em;
  opacity: 0.6;
  transform: rotate(180deg);
  height: 3em;
  line-height: 1;
}

/* ── 布局容器 ── */
.page-faq .faq-layout {
  display: flex;
  gap: var(--spacing-xl, 3rem);
  align-items: flex-start;
}

/* ── 侧边栏 ── */
.page-faq .faq-sidebar {
  flex: 0 0 var(--faq-sidebar-width);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs, 0.5rem);
  padding: var(--spacing-md, 1.5rem) var(--spacing-sm, 1rem);
  background: var(--color-glass, rgba(255,255,255,0.15));
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  border: 1px solid var(--faq-border-color);
  border-radius: 8px;
  position: sticky;
  top: 2rem;
}
.page-faq .faq-sidebar-title {
  font-family: var(--font-accent, 'Noto Sans SC', sans-serif);
  font-size: var(--size-small, 0.75rem);
  font-weight: 300;
  color: var(--color-primary, #1A3B5C);
  writing-mode: vertical-rl;
  text-align: center;
  margin: 0 auto var(--spacing-xs, 0.5rem);
  letter-spacing: 0.3em;
  opacity: 0.5;
  height: 4em;
  line-height: 1;
}
.page-faq .faq-sidebar-link {
  display: block;
  font-family: var(--font-accent, 'Noto Sans SC', sans-serif);
  font-size: var(--size-body, 1rem);
  font-weight: 500;
  color: var(--color-primary, #1A3B5C);
  text-decoration: none;
  writing-mode: vertical-rl;
  padding: var(--spacing-sm, 1rem) var(--spacing-xs, 0.5rem);
  border-radius: 6px;
  transition: background 0.25s, color 0.25s, border-color 0.25s;
  border: 1px solid transparent;
  text-align: center;
  letter-spacing: 0.08em;
  line-height: 1.3;
}
.page-faq .faq-sidebar-link:hover,
.page-faq .faq-sidebar-link:focus-visible {
  background: var(--color-primary, #1A3B5C);
  color: var(--color-text-dark, #FFFFFF);
  border-color: var(--color-accent-gold, #F5A623);
  outline: none;
}
.page-faq .faq-sidebar-link:active {
  background: var(--color-accent-red, #D32F2F);
  color: var(--color-text-dark, #FFFFFF);
}

/* ── 主内容区 ── */
.page-faq .faq-content {
  flex: 1;
  min-width: 0;
}

/* ── 分类区块 ── */
.page-faq .faq-section {
  margin-bottom: var(--spacing-xl, 3rem);
  scroll-margin-top: 2rem;
}
.page-faq .faq-section:target {
  animation: faq-section-glow 1.2s ease-out;
}
@keyframes faq-section-glow {
  0%   { border-left: 4px solid var(--color-accent-gold, #F5A623); padding-left: var(--spacing-md, 1.5rem); }
  100% { border-left: 4px solid transparent; padding-left: var(--spacing-md, 1.5rem); }
}
.page-faq .faq-section-heading {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-sm, 1rem);
  font-family: var(--font-heading, 'Noto Sans SC', sans-serif);
  font-size: var(--size-subtitle, 1.5rem);
  font-weight: 700;
  color: var(--color-primary, #1A3B5C);
  margin: 0 0 var(--spacing-md, 1.5rem) 0;
  padding-bottom: var(--spacing-xs, 0.5rem);
  border-bottom: 1px solid var(--faq-border-color);
}
.page-faq .faq-section-number {
  font-family: var(--font-accent, 'Noto Sans SC', sans-serif);
  font-size: var(--size-small, 0.75rem);
  font-weight: 300;
  writing-mode: vertical-rl;
  opacity: 0.5;
  line-height: 1.2;
  height: 2.8em;
}

/* ── 问答折叠面板 ── */
.page-faq .faq-item {
  display: block;
  margin-bottom: var(--spacing-sm, 1rem);
  border: 1px solid var(--faq-border-color);
  border-radius: 8px;
  background: var(--faq-card-bg);
  transition: box-shadow 0.25s, border-color 0.25s;
  overflow: hidden;
}
.page-faq .faq-item:hover {
  border-color: var(--color-accent-gold, #F5A623);
  box-shadow: 0 2px 12px rgba(26, 59, 92, 0.08);
}
.page-faq .faq-item[open] {
  border-color: var(--color-primary, #1A3B5C);
}
.page-faq .faq-item-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-sm, 1rem);
  padding: var(--spacing-sm, 1rem) var(--spacing-md, 1.5rem);
  font-family: var(--font-heading, 'Noto Sans SC', sans-serif);
  font-size: var(--size-body, 1rem);
  font-weight: 600;
  color: var(--color-primary, #1A3B5C);
  cursor: pointer;
  user-select: none;
  list-style: none;
  transition: background 0.2s;
}
.page-faq .faq-item-summary::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item-summary::marker {
  display: none;
  content: '';
}
.page-faq .faq-item-summary::after {
  content: '';
  display: inline-block;
  width: 0.6em;
  height: 0.6em;
  border-right: 2px solid var(--color-primary, #1A3B5C);
  border-bottom: 2px solid var(--color-primary, #1A3B5C);
  transform: rotate(-45deg);
  transition: transform 0.3s, border-color 0.3s;
  flex-shrink: 0;
  margin-left: auto;
}
.page-faq .faq-item[open] .faq-item-summary::after {
  transform: rotate(45deg);
}
.page-faq .faq-item-summary:hover {
  background: rgba(26, 59, 92, 0.04);
}
.page-faq .faq-item[open] .faq-item-summary {
  border-bottom: 1px solid var(--faq-border-color);
}
.page-faq .faq-answer {
  padding: var(--spacing-sm, 1rem) var(--spacing-md, 1.5rem) var(--spacing-md, 1.5rem);
  font-size: var(--size-body, 1rem);
  line-height: 1.7;
  color: var(--color-text, #1A1A1A);
}
.page-faq .faq-answer p {
  margin: 0;
}
.page-faq .faq-answer a {
  color: var(--color-accent-red, #D32F2F);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color 0.2s;
}
.page-faq .faq-answer a:hover {
  color: var(--color-accent-gold, #F5A623);
}
.page-faq .faq-answer br {
  display: block;
  content: '';
  margin: 0.4em 0;
}

/* ── 联系区块 ── */
.page-faq .faq-contact {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg, 2rem);
  margin-top: var(--spacing-xl, 3rem);
  padding: var(--spacing-lg, 2rem);
  background: var(--color-bg-dark, #0F1D2B);
  border-radius: 12px;
  color: var(--color-text-dark, #FFFFFF);
}
.page-faq .faq-contact-icon {
  flex-shrink: 0;
  width: 60px;
  height: 60px;
  object-fit: contain;
  display: block;
  background: rgba(255,255,255,0.08);
  border-radius: 50%;
  padding: 0.5rem;
}
.page-faq .faq-contact-text {
  flex: 1;
}
.page-faq .faq-contact-note {
  font-size: var(--size-body, 1rem);
  line-height: 1.6;
  margin: 0 0 var(--spacing-sm, 1rem) 0;
  font-family: var(--font-body, 'Noto Serif SC', serif);
}
.page-faq .faq-contact-btn {
  display: inline-block;
  padding: 0.5rem 1.5rem;
  font-family: var(--font-accent, 'Noto Sans SC', sans-serif);
  font-size: var(--size-body, 1rem);
  font-weight: 600;
  color: var(--color-text-dark, #FFFFFF);
  background: transparent;
  border: 2px solid var(--color-accent-gold, #F5A623);
  border-radius: 6px;
  text-decoration: none;
  transition: background 0.25s, color 0.25s, border-color 0.25s;
}
.page-faq .faq-contact-btn:hover,
.page-faq .faq-contact-btn:focus-visible {
  background: var(--color-accent-gold, #F5A623);
  color: var(--color-bg-dark, #0F1D2B);
  outline: none;
}

/* ── 移动端优先 ── */
@media (max-width: 767px) {
  .page-faq {
    padding: var(--spacing-sm, 1rem) var(--spacing-sm, 1rem) var(--spacing-lg, 2rem);
  }
  .page-faq .faq-hero {
    flex-wrap: wrap;
    gap: var(--spacing-sm, 1rem);
    padding-bottom: var(--spacing-sm, 1rem);
    margin-bottom: var(--spacing-lg, 2rem);
  }
  .page-faq .faq-hero-icon {
    width: 64px;
    height: 64px;
  }
  .page-faq .faq-hero-heading {
    font-size: 1.8rem;
  }
  .page-faq .faq-hero-annotation {
    height: 2.5em;
  }
  .page-faq .faq-layout {
    flex-direction: column;
    gap: var(--spacing-md, 1.5rem);
  }
  .page-faq .faq-sidebar {
    flex: none;
    flex-direction: row;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    gap: var(--spacing-xs, 0.5rem);
    padding: var(--spacing-sm, 1rem);
    position: static;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    scrollbar-width: thin;
    border-radius: 8px;
  }
  .page-faq .faq-sidebar-title {
    writing-mode: horizontal-tb;
    height: auto;
    margin: 0;
    padding: 0 var(--spacing-xs, 0.5rem);
    line-height: 2;
    flex-shrink: 0;
  }
  .page-faq .faq-sidebar-link {
    writing-mode: horizontal-tb;
    white-space: nowrap;
    padding: 0.4rem 0.8rem;
    font-size: var(--size-small, 0.75rem);
    border: 1px solid var(--faq-border-color);
    flex-shrink: 0;
  }
  .page-faq .faq-section-heading {
    font-size: 1.2rem;
  }
  .page-faq .faq-contact {
    flex-direction: column;
    text-align: center;
    padding: var(--spacing-md, 1.5rem);
  }
  .page-faq .faq-contact-icon {
    width: 48px;
    height: 48px;
  }
}

/* ── 平板 ── */
@media (min-width: 768px) and (max-width: 1023px) {
  .page-faq {
    padding: var(--spacing-md, 1.5rem) var(--spacing-md, 1.5rem) var(--spacing-xl, 3rem);
  }
  .page-faq .faq-sidebar {
    flex: 0 0 120px;
    padding: var(--spacing-sm, 1rem) var(--spacing-xs, 0.5rem);
  }
  .page-faq .faq-sidebar-link {
    font-size: var(--size-small, 0.75rem);
    padding: var(--spacing-xs, 0.5rem) 0.3rem;
  }
  .page-faq .faq-sidebar-title {
    font-size: 0.65rem;
  }
  .page-faq .faq-hero-heading {
    font-size: 2rem;
  }
}

/* ── 桌面内容宽度 ── */
@media (min-width: 1024px) {
  .page-faq .faq-layout {
    gap: var(--spacing-xl, 3rem);
  }
  .page-faq .faq-sidebar {
    flex: 0 0 var(--faq-sidebar-width);
  }
}

/* ── 大屏安全 ── */
@media (min-width: 1400px) {
  .page-faq .faq-sidebar {
    flex: 0 0 220px;
  }
}