diff --git a/.github/release.md b/.github/release.md
index d92ca17..b551bc4 100644
--- a/.github/release.md
+++ b/.github/release.md
@@ -1,3 +1,4 @@
 ## 🐞 Fix
 
 - 修复红绿色盲主题的代码高亮色
+- 修复仓库中文 README 时的按钮下划线长度
\ No newline at end of file
diff --git a/styles/components/filelist.ts b/styles/components/filelist.ts
index 48453d4..08500f4 100644
--- a/styles/components/filelist.ts
+++ b/styles/components/filelist.ts
@@ -96,6 +96,8 @@ export const repoFiles = css`
         }
         .file-header-left {
           padding: 6px 8px !important;
+          // 伪元素宽度等于按钮宽度而不是父元素宽度
+          position: relative;
           &:hover {
             background: ${themeVars.github.control.transparent.bgColor.hover};
             border-radius: ${otherThemeVars.border.radius};
@@ -104,11 +106,11 @@ export const repoFiles = css`
             content: "";
             background: ${themeVars.github.underlineNav.borderColor.active};
             border-radius: ${otherThemeVars.border.radius};
-            bottom: 0;
+            bottom: -8px;
+            left: 0;
             height: 2px;
             position: absolute;
-            left: 12px;
-            width: 113px;
+            width: 100%;
           }
           a.muted:hover {
             color: inherit;