:root {
  --faq-accent: #00d4aa;
  --faq-accent-rgb: 0, 212, 170;

  --faq-header-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --faq-header-text: #ffffff;
  --faq-header-text-secondary: rgba(255, 255, 255, 0.95);
  --faq-header-grid: rgba(255, 255, 255, 0.1);

  --faq-section-bg: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  --faq-section-accent: #00d4aa;
  --faq-section-title: #ffffff;
  --faq-section-count-bg: rgba(255, 255, 255, 0.1);
  --faq-section-count-text: rgba(255, 255, 255, 0.7);

  --faq-card-bg: #ffffff;
  --faq-card-border: #e8e8e8;
  --faq-card-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  --faq-card-shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.12);
  --faq-card-title: #1a1a2e;
  --faq-card-title-hover: #00d4aa;

  --faq-thumb-bg: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
  --faq-thumb-icon: #adb5bd;
  --faq-thumb-icon-hover: #00d4aa;

  --faq-tag-article-bg: #e3f2fd;
  --faq-tag-article-text: #1976d2;
  --faq-tag-article-bg-hover: #bbdefb;
  --faq-tag-image-bg: #f3e5f5;
  --faq-tag-image-text: #7b1fa2;
  --faq-tag-image-bg-hover: #e1bee7;

  --faq-back-text: #666666;
  --faq-back-border: #e0e0e0;
  --faq-back-hover-text: #00d4aa;
  --faq-back-hover-border: #00d4aa;
  --faq-back-hover-bg: rgba(0, 212, 170, 0.05);

  --faq-divider: #e9ecef;
  --faq-ripple: rgba(0, 212, 170, 0.3);
}

/* 深色模式变量覆盖 */
html[data-theme="dark"] {
  /* Header 区域 */
  --faq-header-gradient: linear-gradient(135deg, #4c51bf 0%, #553c9a 100%);
  --faq-header-text: var(--text-primary, #f3f4f6);
  --faq-header-text-secondary: var(--text-secondary, #9ca3af);
  --faq-header-grid: rgba(255, 255, 255, 0.05);
  
  /* 分区标题 - 使用卡片背景替代渐变 */
  --faq-section-bg: var(--card-bg, #1f1f1f);
  --faq-section-accent: #00d4aa;
  --faq-section-title: var(--text-primary, #f3f4f6);
  --faq-section-count-bg: var(--bg-tertiary, #2d2d2d);
  --faq-section-count-text: var(--text-secondary, #9ca3af);
  
  /* 卡片 */
  --faq-card-bg: var(--card-bg, #1f1f1f);
  --faq-card-border: var(--border-color, #374151);
  --faq-card-shadow: var(--card-shadow, 0 4px 18px rgba(0,0,0,.3));
  --faq-card-shadow-hover: var(--card-shadow-hover, 0 6px 22px rgba(0,0,0,.4));
  --faq-card-title: var(--text-primary, #f3f4f6);
  --faq-card-title-hover: #00d4aa;
  
  /* 卡片缩略图 */
  --faq-thumb-bg: var(--bg-secondary, #1a1a1a);
  --faq-thumb-icon: var(--text-tertiary, #6b7280);
  --faq-thumb-icon-hover: #00d4aa;
  
  /* 标签 - 使用更柔和的颜色 */
  --faq-tag-article-bg: rgba(59, 130, 246, 0.15);
  --faq-tag-article-text: #60a5fa;
  --faq-tag-article-bg-hover: rgba(59, 130, 246, 0.25);
  --faq-tag-image-bg: rgba(139, 92, 246, 0.15);
  --faq-tag-image-text: #a78bfa;
  --faq-tag-image-bg-hover: rgba(139, 92, 246, 0.25);
  
  /* 返回按钮 */
  --faq-back-text: var(--text-secondary, #9ca3af);
  --faq-back-border: var(--border-color, #374151);
  --faq-back-hover-text: #00d4aa;
  --faq-back-hover-border: #00d4aa;
  --faq-back-hover-bg: rgba(0, 212, 170, 0.08);
  
  /* 其他 */
  --faq-divider: var(--border-color, #374151);
  --faq-ripple: rgba(0, 212, 170, 0.2);
}

/* ==== FAQ 头部 ==== */
.faq-header {
  text-align: center;
  margin-bottom: 50px;
  padding: 50px 30px;
  background: var(--faq-header-gradient);
  border-radius: 20px;
  color: var(--faq-header-text);
  position: relative;
  overflow: hidden;
}

.faq-header::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, var(--faq-header-grid) 1px, transparent 1px);
  background-size: 20px 20px;
  opacity: 0.3;
  pointer-events: none;
}

.faq-header h1 {
  font-size: 38px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--faq-header-text);
  position: relative;
  z-index: 1;
}

.faq-header p {
  font-size: 17px;
  opacity: 0.95;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
  color: var(--faq-header-text-secondary);
  position: relative;
  z-index: 1;
}

/* ==== FAQ 分区 ==== */
.faq-section {
  margin-bottom: 60px;
  scroll-margin-top: 20px;
}

.faq-section-title {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 22px 30px;
  background: var(--faq-section-bg);
  border-radius: 16px;
  margin-bottom: 24px;
  box-shadow: var(--card-shadow, 0 4px 20px rgba(0,0,0,0.15));
  position: relative;
  overflow: hidden;
  border: 1px solid transparent;
  transition: border-color 260ms cubic-bezier(.2,.9,.2,1);
}

html[data-theme="dark"] .faq-section-title {
  border-color: var(--border-color, #374151);
}

.faq-section-title::after {
  content: '';
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--faq-section-accent);
}

.faq-section-title i {
  font-size: 26px;
  color: var(--faq-section-accent);
  filter: drop-shadow(0 0 8px rgba(var(--faq-accent-rgb), 0.4));
  transition: filter 260ms cubic-bezier(.2,.9,.2,1);
}

html[data-theme="dark"] .faq-section-title i {
  filter: drop-shadow(0 0 8px rgba(var(--faq-accent-rgb), 0.2));
}

.faq-section-title h2 {
  font-size: 20px;
  font-weight: 600;
  color: var(--faq-section-title);
  margin: 0;
  letter-spacing: 0.5px;
  transition: color 260ms cubic-bezier(.2,.9,.2,1);
}

.faq-section-title .count {
  margin-left: auto;
  font-size: 13px;
  color: var(--faq-section-count-text);
  background: var(--faq-section-count-bg);
  padding: 6px 14px;
  border-radius: 20px;
  font-weight: 500;
  transition: all 260ms cubic-bezier(.2,.9,.2,1);
}

/* ==== 文章网格布局 ==== */
.faq-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
  gap: 18px;
}

@media (max-width: 900px) {
  .faq-grid {
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  }
}

@media (max-width: 768px) {
  .faq-grid {
    grid-template-columns: 1fr;
  }
  
  .faq-header {
    padding: 35px 20px;
  }
  
  .faq-header h1 {
    font-size: 28px;
  }
  
  .faq-section-title {
    padding: 18px 20px;
  }
  
  .faq-section-title h2 {
    font-size: 18px;
  }
}

/* ==== 文章卡片 ==== */
.faq-card {
  display: flex;
  align-items: stretch;
  background: var(--faq-card-bg);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--faq-card-shadow);
  border: 1px solid var(--faq-card-border);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1),
              background-color 260ms cubic-bezier(.2,.9,.2,1),
              border-color 260ms cubic-bezier(.2,.9,.2,1);
  text-decoration: none;
  color: inherit;
  min-height: 100px;
  height: auto;
  position: relative;
}

.faq-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--faq-section-accent);
  transform: scaleY(0);
  transition: transform 0.3s ease;
}

.faq-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--faq-card-shadow-hover);
  border-color: var(--faq-section-accent);
}

.faq-card:hover::before {
  transform: scaleY(1);
}

/* 左侧预览图区域 */
.faq-card-thumb {
  width: 100px;
  min-width: 100px;
  height: 100%;
  background: var(--faq-thumb-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  transition: background 260ms cubic-bezier(.2,.9,.2,1);
}

.faq-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.faq-card:hover .faq-card-thumb img {
  transform: scale(1.08);
}

/* 占位符图标 */
.faq-thumb-placeholder {
  color: var(--faq-thumb-icon);
  font-size: 32px;
  transition: all 0.3s ease, color 260ms cubic-bezier(.2,.9,.2,1);
}

.faq-card:hover .faq-thumb-placeholder {
  color: var(--faq-thumb-icon-hover);
  transform: scale(1.1);
}

/* 右侧内容区域 */
.faq-card-content {
  flex: 1;
  padding: 18px 22px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
}

.faq-card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--faq-card-title);
  line-height: 1.4;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.2s, color 260ms cubic-bezier(.2,.9,.2,1);
}

.faq-card:hover .faq-card-title {
  color: var(--faq-card-title-hover);
}

.faq-card-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--text-tertiary, #888888);
  transition: color 260ms cubic-bezier(.2,.9,.2,1);
}

.faq-card-meta span {
  display: flex;
  align-items: center;
  gap: 5px;
}

.faq-card-meta i {
  font-size: 11px;
}

/* 标签徽章 */
.faq-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 500;
  transition: all 0.2s, background-color 260ms cubic-bezier(.2,.9,.2,1);
}

.faq-tag.article {
  background: var(--faq-tag-article-bg);
  color: var(--faq-tag-article-text);
}

.faq-tag.image {
  background: var(--faq-tag-image-bg);
  color: var(--faq-tag-image-text);
}

.faq-card:hover .faq-tag.article {
  background: var(--faq-tag-article-bg-hover);
}

.faq-card:hover .faq-tag.image {
  background: var(--faq-tag-image-bg-hover);
}

/* ==== 返回按钮样式 ==== */
.faq-back {
  margin-top: 50px;
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid var(--faq-divider);
  transition: border-color 260ms cubic-bezier(.2,.9,.2,1);
}

.faq-back a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--faq-back-text);
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  padding: 12px 24px;
  border-radius: 25px;
  border: 2px solid var(--faq-back-border);
  transition: all 0.25s, 
              color 260ms cubic-bezier(.2,.9,.2,1),
              border-color 260ms cubic-bezier(.2,.9,.2,1),
              background-color 260ms cubic-bezier(.2,.9,.2,1);
}

.faq-back a:hover {
  color: var(--faq-back-hover-text);
  border-color: var(--faq-back-hover-border);
  background: var(--faq-back-hover-bg);
}

/* ==== 平滑滚动 ==== */
html {
  scroll-behavior: smooth;
}

/* ==== 分区进入动画 ==== */
.faq-section {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.6s ease forwards;
}

.faq-section:nth-child(1) { animation-delay: 0.1s; }
.faq-section:nth-child(2) { animation-delay: 0.2s; }
.faq-section:nth-child(3) { animation-delay: 0.3s; }
.faq-section:nth-child(4) { animation-delay: 0.4s; }
.faq-section:nth-child(5) { animation-delay: 0.5s; }
.faq-section:nth-child(6) { animation-delay: 0.6s; }

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}





/* 680px以下极端小屏额外样式（叠加） */
@media (max-width: 680px) {
  .tag-row {
    flex-wrap: wrap;
    transform: none;
  }
  .tag-row .mini-card {
    width: 100%;
    flex: none;
    height: 32px;
  }
  .card h1 {
    font-size: 22px;
    line-height: 1.3;
    white-space: normal !important;
    overflow: visible !important;
  }
  
  /* ==== 极小屏优化：隐藏标签，优先显示标题 ==== */
  .faq-card {
    height: auto;
    min-height: 70px;
    flex-direction: row;
    align-items: center;
  }
  
  .faq-card-thumb {
    width: 55px;
    min-width: 55px;
    height: 55px;
    min-height: 55px;
    margin: 8px;
    border-radius: 10px;
  }
  
  .faq-thumb-placeholder {
    font-size: 22px;
  }
  
  .faq-card-content {
    padding: 10px 12px;
    gap: 4px;
    justify-content: center;
  }
  
  /* 增加行数，确保标题显示 */
  .faq-card-title {
    font-size: 14px;
    line-height: 1.35;
    -webkit-line-clamp: 3;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin: 0;
  }
  
  /* 隐藏 Article/Image 标签 */
  .faq-card-meta {
    display: none;
  }
}

/* 超小屏（530px以下）进一步调整 */
@media (max-width: 530px) {
  .faq-card-thumb {
    width: 48px;
    min-width: 48px;
    height: 48px;
    min-height: 48px;
    margin: 6px;
  }
  
  .faq-thumb-placeholder {
    font-size: 20px;
  }
  
  .faq-card-content {
    padding: 8px 10px;
  }
  
  .faq-card-title {
    font-size: 13px;
    line-height: 1.3;
    -webkit-line-clamp: 4;
  }
}