Optimize menu item & code block styles

styles/public/base.ts

@@ -7,4 +7,8 @@ export const body = css`
   a {
     text-underline-offset: 0.2rem; // 0.2rem 可以始终保持下划线不受 overflow: hidden 的影响
   }
+  // 默认代码块
+  code:not(.code-inner) {
+    padding: 0.2em 0.4em;
+  }
 `;

styles/public/menu.ts

@@ -5,7 +5,7 @@ export const activeItemAfterStyle = {
   backgroundColor: themeVars.github.borderColor.accent.emphasis,
   borderRadius: otherThemeVars.border.radius,
   height: "24px",
-  left: "calc(0.5rem * -1)",
+  left: "-8px",
   position: "absolute",
   top: "calc(50% - 12px)",
   width: "4px",