/* 广告系统样式 */
.ad-slot {
  width: 100%;
  min-height: 90px;
  margin: 20px 0;
  padding: 10px;
  background: #f8f9fa;
  border: 1px dashed #dee2e6;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.ad-slot .ad-placeholder {
  text-align: center;
  color: #6c757d;
}

.ad-slot .ad-label {
  display: inline-block;
  font-size: 11px;
  padding: 2px 6px;
  background: #e9ecef;
  border-radius: 3px;
  margin-right: 8px;
  text-transform: uppercase;
}

.ad-slot .ad-hint {
  font-size: 12px;
}

/* 首页顶部广告 */
.ad-home-top {
  max-width: 728px;
  margin: 20px auto;
}

/* 首页底部广告 */
.ad-home-bottom {
  max-width: 728px;
  margin: 40px auto 20px;
}

/* 工具页侧边广告 */
.ad-tool-sidebar {
  max-width: 300px;
  min-height: 250px;
  margin: 0 auto;
}

/* 工具页底部广告 */
.ad-tool-bottom {
  max-width: 728px;
  margin: 30px auto;
}

/* 博客侧边广告 */
.ad-blog-sidebar {
  max-width: 300px;
  min-height: 250px;
}

/* 移动端广告 */
@media (max-width: 768px) {
  .ad-slot {
    margin: 16px 0;
    min-height: 60px;
  }
  
  .ad-home-top,
  .ad-home-bottom,
  .ad-tool-bottom {
    max-width: 100%;
    margin: 16px;
  }
  
  .ad-tool-sidebar,
  .ad-blog-sidebar {
    max-width: 100%;
    min-height: 100px;
  }
}

/* 会员免广告提示 */
.ad-free-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  font-size: 12px;
  border-radius: 20px;
  font-weight: 500;
}

.ad-free-badge::before {
  content: '✓';
  font-weight: bold;
}