.page-faq {
  --faq-bg-grid: #0B1D3A;
  --faq-card-bg: #F5F0E1;
  --faq-card-border: #C0C0C0;
  --faq-index-width: 80px;
  --faq-toggle-size: 24px;
  --faq-number-color: #FF6B35;
  --faq-question-hover: #1E90FF;
  --faq-answer-bg: #FFFFFF;
  --faq-gap: 1.2rem;
  font-family: var(--font-body);
  color: var(--color-silver);
  background-color: var(--faq-bg-grid);
  background-image:
    linear-gradient(rgba(192, 192, 192, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(192, 192, 192, 0.08) 1px, transparent 1px);
  background-size: 24px 24px;
  padding: var(--spacing-lg) var(--spacing-md);
  min-height: 70vh;
  position: relative;
}

/* 面包屑 */
.page-faq .breadcrumb {
  font-family: var(--font-index);
  font-size: var(--font-size-small);
  color: var(--color-silver);
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-xs);
  border-bottom: 1px solid rgba(192, 192, 192, 0.25);
}

.page-faq .breadcrumb a {
  color: var(--color-dynamic-blue);
  text-decoration: none;
  transition: color var(--transition-speed);
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--color-accent);
  outline: none;
  text-decoration: underline;
}

.page-faq .breadcrumb-sep {
  margin: 0 var(--spacing-xs);
  color: var(--color-silver);
  opacity: 0.6;
}

.page-faq .breadcrumb-current {
  color: var(--color-warm-paper);
  font-weight: 700;
}

/* 标题区 */
.page-faq .faq-hero {
  margin-bottom: var(--spacing-xl);
  position: relative;
}

.page-faq .faq-hero-title {
  font-family: var(--font-heading);
  font-size: var(--font-size-h1);
  font-weight: 700;
  line-height: var(--line-height-heading);
  color: var(--color-warm-paper);
  margin: 0 0 var(--spacing-sm);
  letter-spacing: 0.02em;
  position: relative;
  display: inline-block;
}

.page-faq .faq-hero-title::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 60px;
  height: 4px;
  background: var(--color-accent);
  clip-path: polygon(0 0, 100% 0, 90% 100%, 0 100%);
}

.page-faq .faq-hero-desc {
  font-size: var(--font-size-body);
  color: var(--color-silver);
  margin: var(--spacing-md) 0 var(--spacing-lg);
  max-width: 600px;
  line-height: var(--line-height-body);
}

/* 搜索框 */
.page-faq .faq-search {
  position: relative;
  max-width: 480px;
  margin-bottom: var(--spacing-lg);
}

.page-faq .faq-search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.1rem;
  color: var(--color-silver);
  pointer-events: none;
  z-index: 1;
}

.page-faq .faq-search-input {
  display: block;
  width: 100%;
  padding: 10px 14px 10px 40px;
  font-family: var(--font-body);
  font-size: var(--font-size-body);
  color: var(--color-dark-ink);
  background: var(--color-warm-paper);
  border: 2px solid var(--color-silver);
  border-radius: var(--border-radius);
  outline: none;
  transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
  box-sizing: border-box;
}

.page-faq .faq-search-input::placeholder {
  color: #888;
  font-style: italic;
}

.page-faq .faq-search-input:focus {
  border-color: var(--color-dynamic-blue);
  box-shadow: 0 0 0 3px rgba(30, 144, 255, 0.2);
}

/* 主布局：两栏 */
.page-faq .faq-layout {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  position: relative;
}

/* 索引栏 */
.page-faq .faq-index {
  order: -1;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(192, 192, 192, 0.2);
  border-radius: var(--border-radius);
  padding: var(--spacing-sm) var(--spacing-md);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-faq .faq-index-title {
  font-family: var(--font-index);
  font-size: var(--font-size-index);
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin: 0 0 var(--spacing-sm);
  padding-bottom: var(--spacing-xs);
  border-bottom: 1px solid rgba(192, 192, 192, 0.15);
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: nowrap;
  gap: var(--spacing-xs);
  min-width: max-content;
}

.page-faq .faq-index-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  font-family: var(--font-index);
  font-size: var(--font-size-index);
  font-weight: 700;
  font-style: italic;
  color: var(--color-silver);
  background: transparent;
  border: 1px solid rgba(192, 192, 192, 0.3);
  border-radius: var(--border-radius);
  text-decoration: none;
  transition: background var(--transition-speed), color var(--transition-speed), border-color var(--transition-speed);
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  background: var(--color-accent);
  color: var(--color-dark-ink);
  border-color: var(--color-accent);
  outline: none;
}

.page-faq .faq-index-link:focus-visible {
  outline: var(--focus-outline);
  outline-offset: var(--focus-offset);
}

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

/* 分类 */
.page-faq .faq-category {
  margin-bottom: var(--spacing-xl);
}

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

.page-faq .category-title {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-family: var(--font-heading);
  font-size: var(--font-size-h2);
  font-weight: 700;
  color: var(--color-warm-paper);
  margin: 0 0 var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid rgba(255, 107, 53, 0.5);
  position: relative;
}

.page-faq .category-icon {
  width: 50px;
  height: 50px;
  object-fit: contain;
  flex-shrink: 0;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.08);
  padding: 4px;
  box-sizing: border-box;
}

.page-faq .category-label {
  flex: 1;
}

/* 折叠面板项 */
.page-faq .faq-item {
  display: block;
  margin-bottom: var(--spacing-sm);
  background: var(--faq-card-bg);
  border: 1px solid var(--faq-card-border);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
  transition: box-shadow var(--transition-speed), border-color var(--transition-speed);
  overflow: hidden;
}

.page-faq .faq-item:hover {
  border-color: var(--color-accent);
  box-shadow: 0 2px 12px rgba(255, 107, 53, 0.15);
}

.page-faq .faq-item[open] {
  border-color: var(--color-accent);
  box-shadow: 0 4px 20px rgba(255, 107, 53, 0.18);
}

/* 问题标题 */
.page-faq .faq-question {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-md);
  font-family: var(--font-body);
  font-size: var(--font-size-body);
  font-weight: 700;
  color: var(--color-dark-ink);
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: background var(--transition-speed);
  position: relative;
}

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

.page-faq .faq-question::marker {
  display: none;
  content: '';
}

.page-faq .faq-question:hover {
  background: rgba(30, 144, 255, 0.06);
}

.page-faq .faq-question:focus-visible {
  outline: var(--focus-outline);
  outline-offset: -2px;
  background: rgba(30, 144, 255, 0.08);
}

/* 编号 */
.page-faq .faq-number {
  font-family: var(--font-index);
  font-size: var(--font-size-index);
  font-weight: 700;
  font-style: italic;
  color: var(--faq-number-color);
  flex-shrink: 0;
  width: 32px;
  text-align: right;
  letter-spacing: 0.02em;
}

/* 问题文字 */
.page-faq .faq-text {
  flex: 1;
  line-height: var(--line-height-heading);
}

/* 展开图标 */
.page-faq .faq-toggle-icon {
  flex-shrink: 0;
  width: var(--faq-toggle-size);
  height: var(--faq-toggle-size);
  position: relative;
  transition: transform var(--transition-speed) ease;
}

.page-faq .faq-toggle-icon::before,
.page-faq .faq-toggle-icon::after {
  content: '';
  position: absolute;
  background: var(--color-accent);
  border-radius: 2px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: transform var(--transition-speed) ease, opacity var(--transition-speed) ease;
}

.page-faq .faq-toggle-icon::before {
  width: 2px;
  height: 14px;
}

.page-faq .faq-toggle-icon::after {
  width: 14px;
  height: 2px;
}

.page-faq .faq-item[open] .faq-toggle-icon {
  transform: rotate(45deg);
}

/* 答案区域 */
.page-faq .faq-answer {
  padding: 0 var(--spacing-md) var(--spacing-md) calc(var(--spacing-md) + 32px + var(--spacing-sm));
  font-size: var(--font-size-body);
  line-height: var(--line-height-body);
  color: #333;
  border-top: 1px solid rgba(192, 192, 192, 0.3);
  animation: faq-fade-in 0.3s ease;
}

@keyframes faq-fade-in {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-faq .faq-answer p {
  margin: var(--spacing-sm) 0;
}

.page-faq .faq-answer a {
  color: var(--color-dynamic-blue);
  text-decoration: underline;
  transition: color var(--transition-speed);
}

.page-faq .faq-answer a:hover {
  color: var(--color-accent);
}

.page-faq .faq-answer strong {
  color: var(--color-dark-ink);
  font-weight: 700;
}

.page-faq .faq-answer-img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: var(--spacing-md) 0 0;
  border: 1px solid var(--color-silver);
  border-radius: var(--border-radius);
  background: #f0ede0;
  object-fit: cover;
}

/* 移动端优先：窄屏默认单栏 */
@media (max-width: 767px) {
  .page-faq {
    padding: var(--spacing-md) var(--spacing-sm);
  }

  .page-faq .faq-hero-title {
    font-size: clamp(1.8rem, 6vw, 2.4rem);
  }

  .page-faq .faq-index {
    padding: var(--spacing-xs) var(--spacing-sm);
  }

  .page-faq .faq-index-link {
    width: 36px;
    height: 36px;
    font-size: 0.75rem;
  }

  .page-faq .category-title {
    font-size: var(--font-size-h3);
    flex-wrap: wrap;
  }

  .page-faq .faq-question {
    padding: var(--spacing-sm) var(--spacing-sm);
    font-size: 0.95rem;
    flex-wrap: wrap;
  }

  .page-faq .faq-number {
    width: 28px;
    font-size: 0.75rem;
  }

  .page-faq .faq-answer {
    padding: 0 var(--spacing-sm) var(--spacing-sm) calc(var(--spacing-sm) + 28px + var(--spacing-xs));
    font-size: 0.9rem;
  }

  .page-faq .faq-toggle-icon {
    width: 20px;
    height: 20px;
  }

  .page-faq .faq-toggle-icon::before {
    height: 12px;
  }

  .page-faq .faq-toggle-icon::after {
    width: 12px;
  }
}

/* 桌面端 */
@media (min-width: 768px) {
  .page-faq {
    padding: var(--spacing-xl) var(--spacing-lg);
  }

  .page-faq .faq-layout {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--spacing-xl);
  }

  .page-faq .faq-index {
    order: 0;
    flex-shrink: 0;
    width: var(--faq-index-width);
    position: sticky;
    top: calc(var(--header-height) + var(--spacing-lg));
    max-height: calc(100vh - var(--header-height) - var(--spacing-xl) * 2);
    overflow-y: auto;
    padding: var(--spacing-md) var(--spacing-sm);
  }

  .page-faq .faq-index-list {
    flex-direction: column;
    gap: var(--spacing-xs);
  }

  .page-faq .faq-index-link {
    width: 44px;
    height: 44px;
    font-size: var(--font-size-index);
  }

  .page-faq .faq-content {
    flex: 1;
    min-width: 0;
    max-width: 860px;
  }
}

/* 打印样式 */
@media print {
  .page-faq {
    background: #fff;
    color: #000;
    padding: 1cm;
  }

  .page-faq .faq-index,
  .page-faq .faq-search {
    display: none;
  }

  .page-faq .faq-item {
    clip-path: none;
    border: 1px solid #ccc;
    break-inside: avoid;
  }

  .page-faq .faq-answer {
    animation: none;
  }

  .page-faq .faq-hero-title::after {
    background: #000;
  }
}

/* 减少动效 */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-toggle-icon,
  .page-faq .faq-answer {
    animation: none;
    transition: none;
  }

  .page-faq .faq-item[open] .faq-toggle-icon {
    transform: none;
  }
}