diff --git a/docs/source/_static/favicon.svg b/docs/source/_static/favicon.svg
index f7e756a..8c44bbf 100644
--- a/docs/source/_static/favicon.svg
+++ b/docs/source/_static/favicon.svg
@@ -1,9 +1,17 @@
 <svg width="48" height="48" viewBox="0 0 48 48" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
     <!-- Generated by: https://github.com/CyberZHG/SVGDiagram -->
+    <style>
+        circle { stroke: #000; }
+        text { fill: #000; }
+        @media (prefers-color-scheme: dark) {
+            circle { stroke: #FFF; }
+            text { fill: #FFF; }
+        }
+    </style>
     <!-- Node: icon -->
     <g class="node" id="icon">
         <title>icon</title>
-        <circle cx="24" cy="24" r="20" fill="none" stroke="black" stroke-width="2"/>
+        <circle cx="24" cy="24" r="20" fill="none" stroke-width="2"/>
         <text x="24" y="24" fill="black" text-anchor="middle" dominant-baseline="central" font-size="22" font-weight="bold">局</text>
     </g>
 </svg>