.page-faq {
  --faq-sidebar-width: 260px;
  --faq-sidebar-gap: var(--spacing-xl, 2rem);
  --faq-card-bg: var(--color-warm-paper, #F5E6C8);
  --faq-card-text: var(--color-deep-night, #0B0E14);
  --faq-num-color: var(--color-gold, #FFD700);
  --faq-accent: var(--color-pitch-green, #00E676);
  --faq-hero-accent: var(--color-flame-red, #FF1744);
  --faq-radius: var(--radius-lg, 16px);
  --faq-transition: var(--transition-base, 0.35s ease);

  display: block;
  width: 100%;
  background-color: var(--color-deep-night, #0B0E14);
  color: var(--color-warm-paper, #F5E6C8);
  font-family: var(--font-body, 'Noto Sans SC', 'Microsoft YaHei', sans-serif);
  padding: calc(var(--header-height, 60px) + var(--spacing-lg, 2rem)) 0 var(--spacing-xl, 4rem);
  min-height: 80vh;
}

/* ===== 面包屑 ===== */
.page-faq .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  margin-bottom: var(--spacing-lg, 2rem);
  color: var(--color-dark-gray, #2C2F36);
}

.page-faq .breadcrumb a {
  color: var(--color-pitch-green, #00E676);
  text-decoration: none;
  transition: color var(--transition-fast, 0.2s ease);
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--color-flame-red, #FF1744);
  text-decoration: underline;
}

.page-faq .breadcrumb__sep {
  color: var(--color-dark-gray, #2C2F36);
  margin: 0 0.25rem;
}

.page-faq .breadcrumb [aria-current="page"] {
  color: var(--color-warm-paper, #F5E6C8);
  font-weight: 600;
}

/* ===== Hero 标题区 ===== */
.page-faq .faq-hero {
  margin-bottom: var(--spacing-xl, 4rem);
  position: relative;
}

.page-faq .faq-hero__title {
  font-family: var(--font-heading, Impact, 'Stencil', sans-serif);
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 900;
  color: var(--color-warm-paper, #F5E6C8);
  margin: 0 0 var(--spacing-sm, 0.5rem);
  letter-spacing: -0.02em;
  line-height: 1.05;
  position: relative;
  display: inline-block;
}

.page-faq .faq-hero__title::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--faq-accent, #00E676), var(--faq-hero-accent, #FF1744));
  border-radius: 2px;
}

.page-faq .faq-hero__desc {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-dark-gray, #2C2F36);
  max-width: 640px;
  margin-top: var(--spacing-md, 1rem);
}

/* ===== 布局：左右分栏 ===== */
.page-faq .faq-layout {
  display: flex;
  gap: var(--faq-sidebar-gap, 2rem);
  align-items: flex-start;
}

/* ===== 左侧边栏 ===== */
.page-faq .faq-sidebar {
  flex: 0 0 var(--faq-sidebar-width, 260px);
  position: sticky;
  top: calc(var(--header-height, 60px) + var(--spacing-md, 1rem));
  background-color: var(--color-deep-gray, #1A1D24);
  border-radius: var(--faq-radius, 16px);
  padding: var(--spacing-lg, 2rem) var(--spacing-md, 1rem);
  border: 1px solid var(--color-dark-gray, #2C2F36);
}

.page-faq .faq-sidebar__label {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--faq-accent, #00E676);
  margin-bottom: var(--spacing-md, 1rem);
  font-weight: 600;
}

.page-faq .faq-category-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm, 0.5rem);
}

.page-faq .faq-category-list li {
  margin: 0;
  padding: 0;
}

.page-faq .faq-category-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm, 0.5rem);
  padding: var(--spacing-sm, 0.5rem) var(--spacing-md, 1rem);
  color: var(--color-warm-paper, #F5E6C8);
  text-decoration: none;
  border-radius: var(--radius-md, 8px);
  transition: background-color var(--transition-fast, 0.2s ease), color var(--transition-fast, 0.2s ease);
  font-weight: 500;
  font-size: 0.95rem;
}

.page-faq .faq-category-link:hover,
.page-faq .faq-category-link:focus-visible {
  background-color: rgba(0, 230, 118, 0.12);
  color: var(--faq-accent, #00E676);
}

.page-faq .faq-category-num {
  font-family: var(--font-heading, Impact, 'Stencil', sans-serif);
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--faq-num-color, #FFD700);
  line-height: 1;
  min-width: 2.2rem;
  transition: color var(--transition-fast, 0.2s ease);
}

.page-faq .faq-category-link:hover .faq-category-num,
.page-faq .faq-category-link:focus-visible .faq-category-num {
  color: var(--faq-accent, #00E676);
}

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

/* ===== 搜索框 ===== */
.page-faq .faq-search {
  position: relative;
  margin-bottom: var(--spacing-xl, 4rem);
  max-width: 520px;
}

.page-faq .faq-search__input {
  width: 100%;
  padding: 0.85rem 1rem 0.85rem 3rem;
  font-size: 1rem;
  font-family: var(--font-body, 'Noto Sans SC', 'Microsoft YaHei', sans-serif);
  color: var(--color-warm-paper, #F5E6C8);
  background-color: var(--color-deep-gray, #1A1D24);
  border: 2px solid var(--color-dark-gray, #2C2F36);
  border-radius: var(--radius-lg, 16px);
  outline: none;
  transition: border-color var(--transition-fast, 0.2s ease), box-shadow var(--transition-fast, 0.2s ease);
  -webkit-appearance: none;
  appearance: none;
}

.page-faq .faq-search__input::placeholder {
  color: var(--color-dark-gray, #2C2F36);
  opacity: 0.7;
}

.page-faq .faq-search__input:focus {
  border-color: var(--faq-accent, #00E676);
  box-shadow: 0 0 0 3px rgba(0, 230, 118, 0.15);
}

.page-faq .faq-search__icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.3rem;
  color: var(--color-dark-gray, #2C2F36);
  pointer-events: none;
  line-height: 1;
}

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

/* ===== 分类区块 ===== */
.page-faq .faq-category {
  margin-bottom: var(--spacing-xl, 4rem);
  scroll-margin-top: calc(var(--header-height, 60px) + var(--spacing-lg, 2rem));
}

.page-faq .faq-category__header {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-md, 1rem);
  margin-bottom: var(--spacing-sm, 0.5rem);
}

.page-faq .faq-category__badge {
  font-family: var(--font-heading, Impact, 'Stencil', sans-serif);
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--faq-num-color, #FFD700);
  line-height: 1;
  opacity: 0.75;
  flex-shrink: 0;
}

.page-faq .faq-category__title {
  font-family: var(--font-heading, Impact, 'Stencil', sans-serif);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--color-warm-paper, #F5E6C8);
  margin: 0;
  line-height: 1.15;
}

.page-faq .faq-category__lead {
  font-size: 0.95rem;
  color: var(--color-dark-gray, #2C2F36);
  margin: 0 0 var(--spacing-lg, 2rem) 0;
  padding-left: calc(2.8rem + var(--spacing-md, 1rem));
  max-width: 540px;
  line-height: 1.5;
}

/* ===== 图片区 ===== */
.page-faq .faq-figure {
  margin: 0 0 var(--spacing-lg, 2rem) 0;
  padding-left: calc(2.8rem + var(--spacing-md, 1rem));
  max-width: 520px;
}

.page-faq .faq-figure__img {
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: var(--radius-md, 8px);
  object-fit: cover;
  display: block;
  background-color: var(--color-dark-gray, #2C2F36);
  aspect-ratio: attr(width) / attr(height);
}

.page-faq .faq-figure--small .faq-figure__img {
  max-width: 320px;
}

.page-faq .faq-figure__cap {
  font-size: 0.8rem;
  color: var(--color-dark-gray, #2C2F36);
  margin-top: var(--spacing-xs, 0.25rem);
  font-style: italic;
  letter-spacing: 0.02em;
}

/* ===== 手风琴列表 ===== */
.page-faq .faq-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm, 0.5rem);
}

.page-faq .faq-list__item {
  margin: 0;
  padding: 0;
}

/* ===== 单个手风琴项 ===== */
.page-faq .faq-item {
  background-color: var(--faq-card-bg, #F5E6C8);
  color: var(--faq-card-text, #0B0E14);
  border-radius: var(--radius-md, 8px);
  overflow: hidden;
  border: 1px solid transparent;
  transition: border-color var(--transition-fast, 0.2s ease), box-shadow var(--transition-fast, 0.2s ease);
}

.page-faq .faq-item[open] {
  border-color: var(--faq-accent, #00E676);
  box-shadow: 0 2px 16px rgba(0, 230, 118, 0.08);
}

.page-faq .faq-item__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md, 1rem);
  padding: var(--spacing-md, 1rem) var(--spacing-lg, 2rem);
  font-weight: 600;
  font-size: 1rem;
  line-height: 1.4;
  cursor: pointer;
  list-style: none;
  -webkit-user-select: none;
  user-select: none;
  transition: background-color var(--transition-fast, 0.2s ease);
  position: relative;
}

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

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

.page-faq .faq-item__question:hover {
  background-color: rgba(0, 0, 0, 0.03);
}

.page-faq .faq-item__question:focus-visible {
  outline: 2px solid var(--faq-accent, #00E676);
  outline-offset: -2px;
  border-radius: var(--radius-md, 8px);
}

.page-faq .faq-item__icon {
  flex-shrink: 0;
  width: 1.4rem;
  height: 1.4rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-base, 0.35s ease);
  color: var(--faq-num-color, #FFD700);
  font-size: 1.2rem;
  line-height: 1;
  position: relative;
}

.page-faq .faq-item__icon::before {
  content: '+';
  font-weight: 300;
  font-size: 1.6rem;
  transition: transform var(--transition-base, 0.35s ease);
  display: block;
  line-height: 1;
}

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

.page-faq .faq-item__answer {
  padding: 0 var(--spacing-lg, 2rem) var(--spacing-md, 1rem);
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--faq-card-text, #0B0E14);
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  padding-top: var(--spacing-sm, 0.5rem);
}

.page-faq .faq-item__answer p {
  margin: var(--spacing-sm, 0.5rem) 0;
}

.page-faq .faq-item__answer a {
  color: var(--faq-accent, #00E676);
  text-decoration: underline;
  font-weight: 500;
  transition: color var(--transition-fast, 0.2s ease);
}

.page-faq .faq-item__answer a:hover {
  color: var(--faq-hero-accent, #FF1744);
}

/* ===== 联系渠道列表 ===== */
.page-faq .faq-contact-channels {
  list-style: none;
  margin: var(--spacing-sm, 0.5rem) 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs, 0.25rem);
}

.page-faq .faq-contact-channels li {
  padding: var(--spacing-xs, 0.25rem) 0;
  font-size: 0.95rem;
  line-height: 1.6;
}

.page-faq .faq-contact-channels strong {
  font-weight: 600;
  color: var(--faq-card-text, #0B0E14);
}

.page-faq .faq-contact-channels a {
  color: var(--faq-accent, #00E676);
  text-decoration: underline;
  font-weight: 500;
  transition: color var(--transition-fast, 0.2s ease);
}

.page-faq .faq-contact-channels a:hover {
  color: var(--faq-hero-accent, #FF1744);
}

/* ===== 底部导航链接 ===== */
.page-faq .faq-nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md, 1rem);
  margin-top: var(--spacing-xl, 4rem);
  padding-top: var(--spacing-lg, 2rem);
  border-top: 1px solid var(--color-dark-gray, #2C2F36);
}

.page-faq .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.8rem;
  font-family: var(--font-body, 'Noto Sans SC', 'Microsoft YaHei', sans-serif);
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  border-radius: var(--radius-md, 8px);
  background-color: var(--faq-accent, #00E676);
  color: var(--color-deep-night, #0B0E14);
  text-decoration: none;
  transition: transform var(--transition-fast, 0.2s ease), box-shadow var(--transition-fast, 0.2s ease), filter var(--transition-fast, 0.2s ease);
  cursor: pointer;
  line-height: 1.3;
}

.page-faq .btn:hover,
.page-faq .btn:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 230, 118, 0.25);
  filter: brightness(1.08);
}

.page-faq .btn-secondary {
  background-color: transparent;
  color: var(--faq-hero-accent, #FF1744);
  border: 2px solid var(--faq-hero-accent, #FF1744);
}

.page-faq .btn-secondary:hover,
.page-faq .btn-secondary:focus-visible {
  background-color: var(--faq-hero-accent, #FF1744);
  color: var(--color-warm-paper, #F5E6C8);
  box-shadow: 0 6px 20px rgba(255, 23, 68, 0.2);
}

/* ===== 返回顶部 ===== */
.page-faq .back-to-top {
  position: fixed;
  bottom: var(--spacing-lg, 2rem);
  right: var(--spacing-lg, 2rem);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--faq-accent, #00E676);
  color: var(--color-deep-night, #0B0E14);
  font-size: 1.6rem;
  font-weight: 700;
  border-radius: 50%;
  text-decoration: none;
  box-shadow: 0 4px 16px rgba(0, 230, 118, 0.3);
  transition: transform var(--transition-fast, 0.2s ease), box-shadow var(--transition-fast, 0.2s ease);
  z-index: 100;
  line-height: 1;
}

.page-faq .back-to-top:hover,
.page-faq .back-to-top:focus-visible {
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 8px 28px rgba(0, 230, 118, 0.4);
  background-color: var(--faq-hero-accent, #FF1744);
  color: var(--color-warm-paper, #F5E6C8);
}

/* ============================================ */
/* 移动端适配：窄屏                             */
/* ============================================ */
@media (max-width: 820px) {
  .page-faq {
    padding-left: var(--spacing-md, 1rem);
    padding-right: var(--spacing-md, 1rem);
  }

  .page-faq .faq-layout {
    flex-direction: column;
    gap: var(--spacing-lg, 2rem);
  }

  .page-faq .faq-sidebar {
    position: relative;
    top: auto;
    flex: none;
    width: 100%;
    padding: var(--spacing-md, 1rem);
    border-radius: var(--radius-md, 8px);
  }

  .page-faq .faq-sidebar__label {
    margin-bottom: var(--spacing-sm, 0.5rem);
    font-size: 0.7rem;
  }

  .page-faq .faq-category-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--spacing-xs, 0.25rem);
  }

  .page-faq .faq-category-link {
    padding: var(--spacing-xs, 0.25rem) var(--spacing-sm, 0.5rem);
    font-size: 0.85rem;
    border-radius: var(--radius-sm, 4px);
  }

  .page-faq .faq-category-num {
    font-size: 1.1rem;
    min-width: 1.8rem;
  }

  .page-faq .faq-content {
    width: 100%;
  }

  .page-faq .faq-search {
    max-width: 100%;
  }

  .page-faq .faq-category__lead {
    padding-left: 0;
  }

  .page-faq .faq-figure {
    padding-left: 0;
    max-width: 100%;
  }

  .page-faq .faq-figure--small .faq-figure__img {
    max-width: 100%;
  }

  .page-faq .faq-item__question {
    padding: var(--spacing-sm, 0.5rem) var(--spacing-md, 1rem);
    font-size: 0.95rem;
  }

  .page-faq .faq-item__answer {
    padding: 0 var(--spacing-md, 1rem) var(--spacing-sm, 0.5rem);
    font-size: 0.9rem;
  }

  .page-faq .faq-category__header {
    flex-wrap: wrap;
  }

  .page-faq .faq-category__badge {
    font-size: 2rem;
  }

  .page-faq .faq-nav-links {
    flex-direction: column;
    align-items: stretch;
  }

  .page-faq .faq-nav-links .btn {
    text-align: center;
  }

  .page-faq .back-to-top {
    width: 40px;
    height: 40px;
    font-size: 1.3rem;
    bottom: var(--spacing-md, 1rem);
    right: var(--spacing-md, 1rem);
  }

  .page-faq .faq-hero__title::after {
    width: 60px;
  }
}

@media (max-width: 480px) {
  .page-faq .faq-category-list {
    flex-direction: column;
  }

  .page-faq .faq-category-link {
    padding: var(--spacing-xs, 0.25rem) var(--spacing-sm, 0.5rem);
  }

  .page-faq .faq-category__badge {
    font-size: 1.6rem;
  }

  .page-faq .faq-category__title {
    font-size: 1.2rem;
  }

  .page-faq .faq-hero__title {
    font-size: 1.8rem;
  }
}