/* ===== 页面专属: .page-faq ===== */
.page-faq {
  --faq-tree-width: 280px;
  --faq-card-radius: 6px;
  --faq-border-color: var(--color-border-light, #E0E0E0);
  --faq-accent-line: var(--color-primary, #2E8B57);
  --faq-number-color: var(--color-gold, #FFD700);
  --faq-sidebar-bg: var(--color-bg-white, #FFFFFF);
  --faq-card-bg: var(--color-bg-white, #FFFFFF);
  --faq-empty-color: var(--color-text-secondary, #666666);
  --faq-shadow-card: var(--shadow-sm, 0 1px 3px rgba(0,0,0,0.08));
  --faq-shadow-card-hover: var(--shadow-md, 0 4px 12px rgba(0,0,0,0.12));
  --faq-transition: var(--transition-base, 0.25s ease);
  --faq-font-index: var(--font-mono, 'Courier New', monospace);
}

/* 容器继承共享 .container */
.page-faq .container {
  padding-top: calc(var(--header-height, 64px) + 1rem);
  padding-bottom: var(--spacing-xl, 3rem);
}

/* 面包屑 */
.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--color-text-secondary, #666);
  margin-bottom: var(--spacing-lg, 2rem);
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--faq-border-color);
}
.page-faq .breadcrumb-link {
  color: var(--color-primary, #2E8B57);
  text-decoration: none;
  transition: color var(--faq-transition);
}
.page-faq .breadcrumb-link:hover,
.page-faq .breadcrumb-link:focus-visible {
  color: var(--color-primary-hover, #3CB371);
  text-decoration: underline;
}
.page-faq .breadcrumb-separator {
  color: var(--color-text-light, #AAA);
  font-weight: 300;
}
.page-faq .breadcrumb-current {
  color: var(--color-text-primary, #1A1A1A);
  font-weight: 500;
}

/* Hero 区域 */
.page-faq .faq-hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg, 2rem);
  margin-bottom: var(--spacing-xl, 3rem);
  padding: var(--spacing-lg, 2rem) 0;
  border-bottom: 2px solid var(--faq-accent-line);
}
.page-faq .faq-hero-text {
  flex: 1;
}
.page-faq .faq-hero-title {
  font-family: var(--font-heading, 'Oswald', sans-serif);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 300;
  letter-spacing: 0.04em;
  line-height: 1.1;
  color: var(--color-text-primary, #1A1A1A);
  margin: 0 0 0.5rem;
  text-transform: uppercase;
}
.page-faq .faq-hero-subtitle {
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: 1rem;
  color: var(--color-text-secondary, #666);
  max-width: 480px;
  line-height: 1.6;
  margin: 0;
}
.page-faq .faq-hero-image {
  flex-shrink: 0;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  overflow: hidden;
  border: 2px solid var(--faq-accent-line);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-light, #F5F5F5);
}
.page-faq .faq-hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* 搜索区域 */
.page-faq .faq-search {
  position: relative;
  margin-bottom: var(--spacing-xl, 3rem);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: var(--faq-sidebar-bg);
  border: 1px solid var(--faq-border-color);
  border-radius: var(--faq-card-radius);
  box-shadow: var(--faq-shadow-card);
  transition: box-shadow var(--faq-transition), border-color var(--faq-transition);
}
.page-faq .faq-search:focus-within {
  box-shadow: var(--faq-shadow-card-hover);
  border-color: var(--faq-accent-line);
}
.page-faq .faq-search-label {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary, #666);
  flex-shrink: 0;
}
.page-faq .faq-search-icon {
  display: block;
}
.page-faq .faq-search-input {
  flex: 1;
  border: none;
  outline: none;
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: 1rem;
  padding: 0.25rem 0;
  background: transparent;
  color: var(--color-text-primary, #1A1A1A);
  min-width: 0;
}
.page-faq .faq-search-input::placeholder {
  color: var(--color-text-light, #AAA);
  font-style: italic;
}
.page-faq .faq-search-hint {
  font-size: 0.75rem;
  color: var(--color-text-light, #AAA);
  white-space: nowrap;
  font-family: var(--faq-font-index);
  border-left: 1px solid var(--faq-border-color);
  padding-left: 0.75rem;
  flex-shrink: 0;
}

/* 主布局：侧栏 + 内容 */
.page-faq .faq-layout {
  display: flex;
  gap: var(--spacing-xl, 3rem);
  align-items: flex-start;
}

/* 侧栏 - 分类树 */
.page-faq .faq-sidebar {
  width: var(--faq-tree-width);
  flex-shrink: 0;
  background: var(--faq-sidebar-bg);
  border: 1px solid var(--faq-border-color);
  border-radius: var(--faq-card-radius);
  padding: var(--spacing-lg, 2rem) var(--spacing-md, 1rem);
  box-shadow: var(--faq-shadow-card);
  position: sticky;
  top: calc(var(--header-height, 64px) + 1rem);
}
.page-faq .faq-sidebar-title {
  font-family: var(--font-heading, 'Oswald', sans-serif);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-primary, #1A1A1A);
  margin: 0 0 var(--spacing-md, 1rem);
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--faq-accent-line);
}
.page-faq .faq-tree {
  font-family: var(--font-body, 'Inter', sans-serif);
}
.page-faq .faq-tree-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-faq .faq-tree-item {
  margin-bottom: 0.25rem;
}
.page-faq .faq-tree-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-primary, #1A1A1A);
  cursor: pointer;
  border-radius: 4px;
  transition: background var(--faq-transition), color var(--faq-transition);
  font-family: inherit;
}
.page-faq .faq-tree-link:hover,
.page-faq .faq-tree-link:focus-visible {
  background: var(--color-bg-light, #F5F5F5);
  color: var(--faq-accent-line);
  outline: none;
}
.page-faq .faq-tree-link.is-active {
  color: var(--faq-accent-line);
  background: rgba(46, 139, 87, 0.06);
  font-weight: 600;
}
.page-faq .faq-tree-node {
  display: inline-block;
  width: 8px;
  height: 8px;
  border: 2px solid currentColor;
  border-radius: 2px;
  transform: rotate(45deg);
  flex-shrink: 0;
  transition: transform var(--faq-transition);
}
.page-faq .faq-tree-item.is-expanded > .faq-tree-link .faq-tree-node {
  transform: rotate(90deg);
}
.page-faq .faq-tree-count {
  margin-left: auto;
  font-size: 0.75rem;
  font-family: var(--faq-font-index);
  color: var(--color-text-light, #AAA);
  background: var(--color-bg-light, #F5F5F5);
  padding: 0.0625rem 0.4375rem;
  border-radius: 10px;
  min-width: 1.5rem;
  text-align: center;
}
.page-faq .faq-tree-sublist {
  list-style: none;
  margin: 0 0 0.25rem 1.25rem;
  padding: 0;
  display: none;
}
.page-faq .faq-tree-item.is-expanded .faq-tree-sublist {
  display: block;
}
.page-faq .faq-tree-subitem {
  margin: 0;
}
.page-faq .faq-tree-sublink {
  display: block;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 0.35rem 0.75rem;
  font-size: 0.8125rem;
  color: var(--color-text-secondary, #666);
  cursor: pointer;
  border-radius: 4px;
  transition: background var(--faq-transition), color var(--faq-transition);
  font-family: inherit;
}
.page-faq .faq-tree-sublink:hover,
.page-faq .faq-tree-sublink:focus-visible {
  background: var(--color-bg-light, #F5F5F5);
  color: var(--faq-accent-line);
  outline: none;
}
.page-faq .faq-tree-sublink.is-active {
  color: var(--faq-accent-line);
  font-weight: 500;
}
.page-faq .faq-sidebar-image {
  margin-top: var(--spacing-lg, 2rem);
  border-radius: var(--faq-card-radius);
  overflow: hidden;
  border: 1px solid var(--faq-border-color);
}
.page-faq .faq-sidebar-img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* 内容区 */
.page-faq .faq-content {
  flex: 1;
  min-width: 0;
}
.page-faq .faq-list-heading {
  font-family: var(--font-heading, 'Oswald', sans-serif);
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--color-text-primary, #1A1A1A);
  margin: 0 0 0.25rem;
  text-transform: uppercase;
}
.page-faq .faq-list-desc {
  font-size: 0.875rem;
  color: var(--color-text-secondary, #666);
  margin: 0 0 var(--spacing-lg, 2rem);
  line-height: 1.5;
}

/* 问题卡片 */
.page-faq .faq-cards {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.page-faq .faq-card {
  background: var(--faq-card-bg);
  border: 1px solid var(--faq-border-color);
  border-radius: var(--faq-card-radius);
  box-shadow: var(--faq-shadow-card);
  transition: box-shadow var(--faq-transition), border-color var(--faq-transition);
  overflow: hidden;
}
.page-faq .faq-card:hover {
  box-shadow: var(--faq-shadow-card-hover);
  border-color: var(--faq-accent-line);
}
.page-faq .faq-card-header {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.875rem 1rem;
}
.page-faq .faq-card-index {
  font-family: var(--faq-font-index);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--faq-number-color);
  line-height: 1.5;
  min-width: 2rem;
  flex-shrink: 0;
  padding-top: 0.125rem;
}
.page-faq .faq-card-question {
  flex: 1;
  margin: 0;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.4;
}
.page-faq .faq-card-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  color: inherit;
  cursor: pointer;
  font-family: var(--font-body, 'Inter', sans-serif);
  font-weight: 500;
  transition: color var(--faq-transition);
}
.page-faq .faq-card-toggle:hover,
.page-faq .faq-card-toggle:focus-visible {
  color: var(--faq-accent-line);
  outline: none;
}
.page-faq .faq-card-toggle[aria-expanded="true"] {
  color: var(--faq-accent-line);
}
.page-faq .faq-card-arrow {
  flex-shrink: 0;
  transition: transform var(--faq-transition);
  color: var(--color-text-light, #AAA);
}
.page-faq .faq-card-toggle[aria-expanded="true"] .faq-card-arrow {
  transform: rotate(180deg);
  color: var(--faq-accent-line);
}
.page-faq .faq-card-body {
  padding: 0 1rem 1rem 3.5rem;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-text-secondary, #666);
}
.page-faq .faq-card-body p {
  margin: 0 0 0.75rem;
}
.page-faq .faq-card-body p:last-child {
  margin-bottom: 0;
}
.page-faq .faq-card-link {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--faq-accent-line);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--faq-transition), color var(--faq-transition);
}
.page-faq .faq-card-link:hover,
.page-faq .faq-card-link:focus-visible {
  border-bottom-color: currentColor;
  color: var(--color-primary-hover, #3CB371);
}

/* 空状态 */
.page-faq .faq-empty {
  text-align: center;
  padding: var(--spacing-xl, 3rem) var(--spacing-md, 1rem);
  border: 1px dashed var(--faq-border-color);
  border-radius: var(--faq-card-radius);
  background: var(--color-bg-light, #F5F5F5);
}
.page-faq .faq-empty-text {
  font-size: 1rem;
  color: var(--faq-empty-color);
  margin: 0;
}

/* CTA 区域 */
.page-faq .faq-cta {
  margin-top: var(--spacing-2xl, 4rem);
}
.page-faq .faq-cta-card {
  background: var(--color-deep-blue, #1C1C3A);
  border-radius: var(--faq-card-radius);
  padding: var(--spacing-xl, 3rem) var(--spacing-lg, 2rem);
  text-align: center;
  color: var(--color-text-white, #FFFFFF);
  border: 1px solid var(--color-deep-blue-light, #2A2A5A);
}
.page-faq .faq-cta-title {
  font-family: var(--font-heading, 'Oswald', sans-serif);
  font-size: clamp(1.25rem, 3vw, 2rem);
  font-weight: 400;
  letter-spacing: 0.04em;
  margin: 0 0 0.5rem;
  text-transform: uppercase;
}
.page-faq .faq-cta-text {
  font-size: 1rem;
  color: var(--color-text-light, #AAA);
  margin: 0 0 var(--spacing-lg, 2rem);
  line-height: 1.6;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}
.page-faq .faq-cta-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}
.page-faq .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.625rem 1.5rem;
  font-family: var(--font-body, 'Inter', sans-serif);
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.4;
  text-decoration: none;
  border-radius: var(--border-radius, 4px);
  cursor: pointer;
  transition: background var(--faq-transition), color var(--faq-transition), border-color var(--faq-transition), box-shadow var(--faq-transition);
  border: 1px solid transparent;
}
.page-faq .btn-outline {
  background: transparent;
  color: var(--color-text-white, #FFFFFF);
  border-color: var(--color-text-white, #FFFFFF);
}
.page-faq .btn-outline:hover,
.page-faq .btn-outline:focus-visible {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-gold, #FFD700);
  color: var(--color-gold, #FFD700);
}
.page-faq .btn-primary {
  background: var(--color-primary, #2E8B57);
  color: var(--color-text-white, #FFFFFF);
  border-color: var(--color-primary, #2E8B57);
}
.page-faq .btn-primary:hover,
.page-faq .btn-primary:focus-visible {
  background: var(--color-primary-hover, #3CB371);
  border-color: var(--color-primary-hover, #3CB371);
  box-shadow: var(--faq-shadow-card-hover);
}

/* 隐藏辅助 */
.page-faq .visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* 响应式: 移动端优先 */
@media (max-width: 767px) {
  .page-faq .faq-hero {
    flex-direction: column-reverse;
    text-align: center;
    padding: var(--spacing-md, 1rem) 0;
  }
  .page-faq .faq-hero-subtitle {
    max-width: 100%;
  }
  .page-faq .faq-hero-image {
    width: 80px;
    height: 80px;
  }
  .page-faq .faq-search-hint {
    display: none;
  }
  .page-faq .faq-layout {
    flex-direction: column;
    gap: var(--spacing-lg, 2rem);
  }
  .page-faq .faq-sidebar {
    width: 100%;
    position: static;
    padding: var(--spacing-md, 1rem);
  }
  .page-faq .faq-sidebar-image {
    display: none;
  }
  .page-faq .faq-tree-sublist {
    margin-left: 1rem;
  }
  .page-faq .faq-card-body {
    padding: 0 1rem 1rem 1rem;
  }
  .page-faq .faq-card-index {
    min-width: 1.5rem;
    font-size: 0.6875rem;
  }
  .page-faq .faq-cta-actions {
    flex-direction: column;
    align-items: center;
  }
  .page-faq .btn {
    width: 100%;
    max-width: 260px;
  }
  .page-faq .faq-card-header {
    padding: 0.75rem;
  }
  .page-faq .faq-card-question {
    font-size: 0.9375rem;
  }
}

@media (min-width: 768px) and (max-width: 1024px) {
  .page-faq .faq-sidebar {
    width: 220px;
    padding: var(--spacing-md, 1rem);
  }
  .page-faq .faq-sidebar-image {
    display: none;
  }
  .page-faq .faq-card-body {
    padding-left: 3rem;
  }
}

@media (min-width: 1025px) {
  .page-faq .faq-sidebar {
    width: var(--faq-tree-width);
  }
}