diff --git a/src/config/setting.js b/src/config/setting.js
index d8cbc79..2671fed 100644
--- a/src/config/setting.js
+++ b/src/config/setting.js
@@ -98,10 +98,10 @@ export const DEFAULT_TRANBOX_SETTING = {
 const SUBTITLE_WINDOW_STYLE = `padding: 0.5em 1em;
 background-color: rgba(0, 0, 0, 0.5);
 color: white;
-line-height: 1.2;
+line-height: 1.3;
 text-shadow: 1px 1px 2px black;
 opacity: 0;
-transition: opacity 0.2s ease-in-out;
+transition: opacity 0.3s ease-in-out;
 display: inline-block`;
 
 const SUBTITLE_ORIGIN_STYLE = `font-size: clamp(1.5rem, 3cqw, 3rem);`;