// 增强版面包屑导航（支持分类/标签/搜索等）
function mpoll_breadcrumb_enhanced() {
  echo '<nav class="breadcrumb-nav" aria-label="面包屑导航">';
  echo '<a href="' . home_url() . '" style="color:#2563eb;text-decoration:none;">首页</a>';
  
  if (is_category()) {
    echo '<span class="breadcrumb-separator" style="margin:0 8px;color:#94a3b8;">»</span>';
    single_cat_title('<span style="color:#64748b;">', '</span>');
  } elseif (is_tag()) {
    echo '<span class="breadcrumb-separator" style="margin:0 8px;color:#94a3b8;">»</span>';
    single_tag_title('<span style="color:#64748b;">标签：', '</span>');
  } elseif (is_single()) {
    $categories = get_the_category();
    if ($categories) {
      echo '<span class="breadcrumb-separator" style="margin:0 8px;color:#94a3b8;">»</span>';
      echo '<a href="' . get_category_link($categories[0]->term_id) . '" style="color:#2563eb;text-decoration:none;">' . $categories[0]->name . '</a>';
    }
    echo '<span class="breadcrumb-separator" style="margin:0 8px;color:#94a3b8;">»</span>';
    echo '<span style="color:#64748b;">' . get_the_title() . '</span>';
  } elseif (is_page()) {
    echo '<span class="breadcrumb-separator" style="margin:0 8px;color:#94a3b8;">»</span>';
    echo '<span style="color:#64748b;">' . get_the_title() . '</span>';
  } elseif (is_search()) {
    echo '<span class="breadcrumb-separator" style="margin:0 8px;color:#94a3b8;">»</span>';
    echo '<span style="color:#64748b;">搜索结果：' . get_search_query() . '</span>';
  } elseif (is_author()) {
    echo '<span class="breadcrumb-separator" style="margin:0 8px;color:#94a3b8;">»</span>';
    echo '<span style="color:#64748b;">作者：' . get_the_author() . '</span>';
  } elseif (is_archive()) {
    echo '<span class="breadcrumb-separator" style="margin:0 8px;color:#94a3b8;">»</span>';
    echo '<span style="color:#64748b;">归档</span>';
  }
  
  echo '</nav>';
}

// 热门文章小工具
function mpoll_sidebar_popular_posts($count = 5) {
  echo '<div class="sidebar-module">';
  echo '<h3 class="sidebar-module-title">🔥 热门文章</h3>';
  echo '<ul style="list-style:none;padding:0;margin:0;">';
  
  $args = array(
    'post_type' => 'post',
    'posts_per_page' => $count,
    'meta_key' => 'views',
    'orderby' => 'meta_value_num',
    'order' => 'DESC'
  );
  
  $popular_posts = new WP_Query($args);
  
  if ($popular_posts->have_posts()) {
    $i = 1;
    while ($popular_posts->have_posts()) {
      $popular_posts->the_post();
      echo '<li style="padding:12px 0;border-bottom:1px solid #f1f5f9;display:flex;gap:10px;align-items:center;">';
      echo '<span style="background:#2563eb;color:#fff;width:24px;height:24px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:bold;">' . $i . '</span>';
      echo '<a href="' . get_permalink() . '" style="color:#475569;text-decoration:none;font-size:14px;flex:1;" title="' . get_the_title() . '">' . mb_strimwidth(get_the_title(), 0, 40, '...') . '</a>';
      echo '</li>';
      $i++;
    }
    wp_reset_postdata();
  } else {
    // 如果没有浏览量数据，显示最新文章
    $recent_posts = wp_get_recent_posts(array('numberposts' => $count));
    $i = 1;
    foreach ($recent_posts as $post) {
      echo '<li style="padding:12px 0;border-bottom:1px solid #f1f5f9;display:flex;gap:10px;align-items:center;">';
      echo '<span style="background:#2563eb;color:#fff;width:24px;height:24px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:bold;">' . $i . '</span>';
      echo '<a href="' . get_permalink($post['ID']) . '" style="color:#475569;text-decoration:none;font-size:14px;flex:1;">' . esc_html($post['post_title']) . '</a>';
      echo '</li>';
      $i++;
    }
  }
  
  echo '</ul>';
  echo '</div>';
}

// 标签云小工具
function mpoll_sidebar_tag_cloud() {
  echo '<div class="sidebar-module">';
  echo '<h3 class="sidebar-module-title">🏷️ 热门标签</h3>';
  echo '<div class="tag-cloud">';
  
  $tags = get_tags(array('number' => 20, 'orderby' => 'count', 'order' => 'DESC'));
  
  foreach ($tags as $tag) {
    echo '<a href="' . get_tag_link($tag->term_id) . '" class="tag-cloud-item" style="padding:6px 12px;background:#f1f5f9;color:#475569;border-radius:20px;font-size:13px;text-decoration:none;display:inline-block;margin:4px;">#' . esc_html($tag->name) . '</a>';
  }
  
  echo '</div>';
  echo '</div>';
}

// 最新评论小工具
function mpoll_sidebar_recent_comments($count = 6) {
  echo '<div class="sidebar-module">';
  echo '<h3 class="sidebar-module-title">💬 最新评论</h3>';
  
  $comments = get_comments(array('number' => $count, 'status' => 'approve'));
  
  echo '<ul style="list-style:none;padding:0;margin:0;">';
  foreach ($comments as $comment) {
    echo '<li style="padding:12px 0;border-bottom:1px solid #f1f5f9;">';
    echo '<div style="font-size:13px;color:#64748b;margin-bottom:4px;">';
    echo '<strong style="color:#2563eb;">' . esc_html($comment->comment_author) . '</strong>';
    echo ' 评论于 <a href="' . get_permalink($comment->comment_post_ID) . '#comment-' . $comment->comment_ID . '" style="color:#475569;text-decoration:none;">' . mb_strimwidth(get_the_title($comment->comment_post_ID), 0, 25, '...') . '</a>';
    echo '</div>';
    echo '<p style="font-size:13px;color:#94a3b8;margin:0;">' . esc_html(mb_strimwidth($comment->comment_content, 0, 50, '...')) . '</p>';
    echo '</li>';
  }
  echo '</ul>';
  echo '</div>';
}
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<b>Warning</b>:  Cannot modify header information - headers already sent by (output started at /var/www/mpoll.top/wp-content/themes/mpoll-2026/functions.php:101) in <b>/var/www/mpoll.top/wp-includes/pluggable.php</b> on line <b>1534</b><br />