diff --git a/src/Common.css b/src/Common.css
index 2ffd30d..d6dfff8 100644
--- a/src/Common.css
+++ b/src/Common.css
@@ -18,11 +18,12 @@
 body::after {
   content: '';
   position: fixed;
-  inset: 0;
+  inset: -30vh -30vw;
   z-index: 9999;
   pointer-events: none;
   background-image: url('images/watermark.svg');
   background-repeat: repeat;
+  transform: rotate(-30deg);
 }
 
 body.root-dark-mode::after {
diff --git a/src/images/watermark.svg b/src/images/watermark.svg
index 9ef2adb..1b4aad4 100644
--- a/src/images/watermark.svg
+++ b/src/images/watermark.svg
@@ -1,5 +1,3 @@
-<svg xmlns="http://www.w3.org/2000/svg" width="240" height="140" viewBox="0 0 240 140">
-  <g transform="translate(120 70) rotate(-45)">
-    <text x="0" y="0" text-anchor="middle" dominant-baseline="middle" font-size="48" fill="rgba(0,0,0,0.016)" font-family="sans-serif">请勿截屏</text>
-  </g>
+<svg xmlns="http://www.w3.org/2000/svg" width="240" height="120" viewBox="0 0 240 120">
+  <text x="120" y="60" text-anchor="middle" dominant-baseline="middle" font-size="50" fill="rgba(0,0,0,0.016)" font-family="sans-serif">请勿截屏</text>
 </svg>