diff --git a/web/template/syzoj/category.php b/web/template/syzoj/category.php
index 747c9d4..7f0b9e3 100644
--- a/web/template/syzoj/category.php
+++ b/web/template/syzoj/category.php
@@ -19,14 +19,32 @@
 ];
         
         // 生成标签地图
+        // 定义颜色主题数组
+        $color_theme = array("primary", "secondary", "positive", "negative", "orange", "yellow", "olive", "green", "teal", "blue", "violet", "purple", "pink", "brown", "grey", "black");
+        
+        // 为标签添加颜色样式
+        function colorize_tag($tag) {
+            global $color_theme;
+            $hash_num = hexdec(substr(md5($tag), 0, 7));
+            $label_theme = $color_theme[$hash_num % count($color_theme)];
+            
+            if ($label_theme == "")
+            $label_theme = "default";
+            
+            return $label_theme;
+        }
+
         foreach ($tag_map as $level => $tags): ?>
-            <h3>分类 <?php echo $level; ?></h3>
+            <h3><a href="problemset.php?search=难度<?php echo $level; ?>">难度 <?php echo $level; ?></a></h3>
             <div class="tag-cloud">
-            <?php foreach ($tags as $tag): ?>
-                <a href="problemset.php?search=<?php echo urlencode($tag); ?>" class="ui label"><?php echo $tag; ?></a>
+            <?php foreach ($tags as $tag): 
+            $label_theme = colorize_tag($tag);
+            ?>
+            <a href="problemset.php?search=<?php echo urlencode($tag); ?>" class="ui <?php echo $label_theme; ?> label"><?php echo $tag; ?></a>
             <?php endforeach; ?>
             </div>
-        <?php endforeach; 
+        <?php endforeach; ?>
+        <?php 
         
         // 显示剩余未分类标签
         $all_mapped_tags = array_merge(...array_values($tag_map));