diff --git a/apps/renderer/src/modules/editor/css-editor.tsx b/apps/renderer/src/modules/editor/css-editor.tsx
index 395dbce9c..a12f9e484 100644
--- a/apps/renderer/src/modules/editor/css-editor.tsx
+++ b/apps/renderer/src/modules/editor/css-editor.tsx
@@ -1,4 +1,4 @@
-import { useIsDark } from "@follow/hooks"
+import { useInputComposition, useIsDark } from "@follow/hooks"
 import { nextFrame } from "@follow/utils/dom"
 import { cn } from "@follow/utils/utils"
 import { createPlainShiki } from "plain-shiki"
@@ -44,30 +44,45 @@ export const CSSEditor: Component<{
     }
     return () => dispose?.()
   }, [isDark])
+  const props = useInputComposition<HTMLInputElement>({
+    onKeyDown: (e) => {
+      if (e.key === "Escape") {
+        e.preventDefault()
+      }
+      if (e.key === "Tab") {
+        e.preventDefault()
+        const selection = window.getSelection()
+        if (selection && selection.rangeCount > 0) {
+          const range = selection.getRangeAt(0)
+          const tabNode = document.createTextNode("\u00A0\u00A0\u00A0\u00A0") // Using four non-breaking spaces as a tab
+          range.insertNode(tabNode)
+          range.setStartAfter(tabNode)
+          range.setEndAfter(tabNode)
+          selection.removeAllRanges()
+          selection.addRange(range)
+        }
+      }
+      nextFrame(() => {
+        onChange(ref.current?.textContent ?? "")
+      })
+    },
+  })
   return (
     <div
-      className={cn("size-full", className)}
+      className={cn(
+        "size-full",
+
+        "ring-accent/20 duration-200 focus:border-accent/80 focus:outline-none focus:ring-2",
+        "focus:!bg-accent/5",
+        "border border-border",
+        "placeholder:text-theme-placeholder-text dark:bg-zinc-700/[0.15] dark:text-zinc-200",
+        "hover:border-accent/60",
+        className,
+      )}
       ref={ref}
       contentEditable
       tabIndex={0}
-      onKeyDown={(e) => {
-        if (e.key === "Tab") {
-          e.preventDefault()
-          const selection = window.getSelection()
-          if (selection && selection.rangeCount > 0) {
-            const range = selection.getRangeAt(0)
-            const tabNode = document.createTextNode("\u00A0\u00A0\u00A0\u00A0") // Using four non-breaking spaces as a tab
-            range.insertNode(tabNode)
-            range.setStartAfter(tabNode)
-            range.setEndAfter(tabNode)
-            selection.removeAllRanges()
-            selection.addRange(range)
-          }
-        }
-        nextFrame(() => {
-          onChange(ref.current?.textContent ?? "")
-        })
-      }}
+      {...props}
     />
   )
 }
diff --git a/apps/renderer/src/modules/settings/tabs/apperance.tsx b/apps/renderer/src/modules/settings/tabs/apperance.tsx
index 53d29c8da..cfd923c8f 100644
--- a/apps/renderer/src/modules/settings/tabs/apperance.tsx
+++ b/apps/renderer/src/modules/settings/tabs/apperance.tsx
@@ -1,4 +1,5 @@
 import { Button } from "@follow/components/ui/button/index.js"
+import { LoadingCircle } from "@follow/components/ui/loading/index.js"
 import {
   Select,
   SelectContent,
@@ -10,7 +11,7 @@ import { useIsDark, useThemeAtomValue } from "@follow/hooks"
 import { IN_ELECTRON } from "@follow/shared/constants"
 import { getOS } from "@follow/utils/utils"
 import { useForceUpdate } from "framer-motion"
-import { useEffect, useRef } from "react"
+import { lazy, Suspense, useEffect, useRef } from "react"
 import { useTranslation } from "react-i18next"
 import { bundledThemesInfo } from "shiki/themes"
 
@@ -26,7 +27,6 @@ import { useCurrentModal, useModalStack } from "~/components/ui/modal/stacked/ho
 import { isElectronBuild } from "~/constants"
 import { useSetTheme } from "~/hooks/common"
 
-import { CSSEditor } from "../../editor/css-editor"
 import { SETTING_MODAL_ID } from "../constants"
 import {
   SettingActionItem,
@@ -330,6 +330,9 @@ const CustomCSS = () => {
     </SettingItemGroup>
   )
 }
+const LazyCSSEditor = lazy(() =>
+  import("../../editor/css-editor").then((m) => ({ default: m.CSSEditor })),
+)
 
 const CustomCSSModal = () => {
   const initialCSS = useRef(getUISettings().customCSS)
@@ -350,7 +353,7 @@ const CustomCSSModal = () => {
     return () => {
       setUISetting("modalOverlay", prevOverlay)
 
-      modal.style.display = "block"
+      modal.style.display = ""
     }
   }, [])
   const [forceUpdate, key] = useForceUpdate()
@@ -365,14 +368,22 @@ const CustomCSSModal = () => {
         dismiss()
       }}
     >
-      <CSSEditor
-        defaultValue={initialCSS.current}
-        key={key}
-        className="h-0 grow rounded-lg border p-3 font-mono"
-        onChange={(value) => {
-          setUISetting("customCSS", value)
-        }}
-      />
+      <Suspense
+        fallback={
+          <div className="center flex h-0 grow">
+            <LoadingCircle size="large" />
+          </div>
+        }
+      >
+        <LazyCSSEditor
+          defaultValue={initialCSS.current}
+          key={key}
+          className="h-0 grow rounded-lg border p-3 font-mono"
+          onChange={(value) => {
+            setUISetting("customCSS", value)
+          }}
+        />
+      </Suspense>
 
       <div className="mt-2 flex shrink-0 justify-end gap-2">
         <Button