diff --git a/src/hooks/Theme.js b/src/hooks/Theme.js
index 7349c3f..4346243 100644
--- a/src/hooks/Theme.js
+++ b/src/hooks/Theme.js
@@ -12,10 +12,24 @@ import { THEME_DARK, THEME_LIGHT } from "../config";
 export default function Theme({ children, options }) {
   const { darkMode } = useDarkMode();
   const theme = useMemo(() => {
+    let htmlFontSize = 16;
+    try {
+      const s = window.getComputedStyle(document.body.parentNode).fontSize;
+      const fontSize = parseInt(s.replace("px", ""));
+      if (fontSize > 0 && fontSize < 1000) {
+        htmlFontSize = fontSize;
+      }
+    } catch (err) {
+      //
+    }
+
     return createTheme({
       palette: {
         mode: darkMode ? THEME_DARK : THEME_LIGHT,
       },
+      typography: {
+        htmlFontSize,
+      },
       ...options,
     });
   }, [darkMode, options]);
diff --git a/src/libs/webfix.js b/src/libs/webfix.js
index fff1d21..a82d64b 100644
--- a/src/libs/webfix.js
+++ b/src/libs/webfix.js
@@ -15,7 +15,7 @@ export const FIXER_ALL = [
   FIXER_BN,
   FIXER_BR_DIV,
   FIXER_BN_DIV,
-  FIXER_FONTSIZE,
+  // FIXER_FONTSIZE,
 ];
 
 /**
diff --git a/src/views/Options/Header.js b/src/views/Options/Header.js
index ee67c03..43d57ac 100644
--- a/src/views/Options/Header.js
+++ b/src/views/Options/Header.js
@@ -6,6 +6,7 @@ import Box from "@mui/material/Box";
 import Link from "@mui/material/Link";
 import { useI18n } from "../../hooks/I18n";
 import DarkModeButton from "./DarkModeButton";
+import Typography from "@mui/material/Typography";
 
 function Header(props) {
   const i18n = useI18n();
@@ -30,14 +31,14 @@ function Header(props) {
             <MenuIcon />
           </IconButton>
         </Box>
-        <Box sx={{ flexGrow: 1 }}>
+        <Typography component="div" sx={{ flexGrow: 1, fontWeight: "bold" }}>
           <Link
             underline="none"
             color="inherit"
             href={process.env.REACT_APP_HOMEPAGE}
             target="_blank"
           >{`${i18n("app_name")} v${process.env.REACT_APP_VERSION}`}</Link>
-        </Box>
+        </Typography>
         <DarkModeButton />
       </Toolbar>
     </AppBar>
diff --git a/src/views/Popup/Header.js b/src/views/Popup/Header.js
index ed2af91..304e1bc 100644
--- a/src/views/Popup/Header.js
+++ b/src/views/Popup/Header.js
@@ -4,6 +4,7 @@ import CloseIcon from "@mui/icons-material/Close";
 import HomeIcon from "@mui/icons-material/Home";
 import Stack from "@mui/material/Stack";
 import DarkModeButton from "../Options/DarkModeButton";
+import Typography from "@mui/material/Typography";
 
 export default function Header({ setShowPopup }) {
   const handleHomepage = () => {
@@ -21,14 +22,16 @@ export default function Header({ setShowPopup }) {
         <IconButton onClick={handleHomepage}>
           <HomeIcon />
         </IconButton>
-        <Box
+        <Typography
+          component="div"
           sx={{
             userSelect: "none",
             WebkitUserSelect: "none",
+            fontWeight: "bold",
           }}
         >
           {`${process.env.REACT_APP_NAME} v${process.env.REACT_APP_VERSION}`}
-        </Box>
+        </Typography>
       </Stack>
 
       {setShowPopup ? (
diff --git a/src/views/Selection/DictCont.js b/src/views/Selection/DictCont.js
index ea11217..67ff005 100644
--- a/src/views/Selection/DictCont.js
+++ b/src/views/Selection/DictCont.js
@@ -2,6 +2,7 @@ import Box from "@mui/material/Box";
 import Chip from "@mui/material/Chip";
 import Stack from "@mui/material/Stack";
 import FavBtn from "./FavBtn";
+import Typography from "@mui/material/Typography";
 
 const exchangeMap = {
   word_third: "第三人称单数",
@@ -24,16 +25,16 @@ export default function DictCont({ dictResult }) {
         justifyContent="space-between"
         alignItems="flex-start"
       >
-        <div style={{ fontWeight: "bold" }}>
+        <Typography variant="subtitle1" style={{ fontWeight: "bold" }}>
           {dictResult.simple_means?.word_name}
-        </div>
+        </Typography>
         <FavBtn word={dictResult.simple_means?.word_name} />
       </Stack>
 
       {dictResult.simple_means?.symbols?.map(({ ph_en, ph_am, parts }, idx) => (
-        <div key={idx}>
+        <Typography key={idx} component="div">
           {(ph_en || ph_am) && (
-            <div>{`英 /${ph_en || ""}/ 美 /${ph_am || ""}/`}</div>
+            <Typography>{`英 /${ph_en || ""}/ 美 /${ph_am || ""}/`}</Typography>
           )}
           <ul style={{ margin: "0.5em 0" }}>
             {parts.map(({ part, means }, idx) => (
@@ -42,14 +43,14 @@ export default function DictCont({ dictResult }) {
               </li>
             ))}
           </ul>
-        </div>
+        </Typography>
       ))}
 
-      <div>
+      <Typography>
         {Object.entries(dictResult.simple_means?.exchange || {})
           .map(([key, val]) => `${exchangeMap[key] || key}: ${val.join(", ")}`)
           .join("; ")}
-      </div>
+      </Typography>
 
       <Stack direction="row" spacing={1} flexWrap="wrap" useFlexGap>
         {Object.values(dictResult.simple_means?.tags || {})
diff --git a/src/views/Selection/TranBox.js b/src/views/Selection/TranBox.js
index 1a7b0e7..d58522a 100644
--- a/src/views/Selection/TranBox.js
+++ b/src/views/Selection/TranBox.js
@@ -95,6 +95,7 @@ function TranForm({ text, setText, tranboxSetting, transApis }) {
 
       <Box>
         <TextField
+          size="small"
           label={i18n("original_text")}
           inputRef={inputRef}
           fullWidth
diff --git a/src/views/Selection/TranCont.js b/src/views/Selection/TranCont.js
index e110234..7a04432 100644
--- a/src/views/Selection/TranCont.js
+++ b/src/views/Selection/TranCont.js
@@ -69,6 +69,7 @@ export default function TranCont({
     <>
       <Box>
         <TextField
+          size="small"
           label={i18n("translated_text")}
           // disabled
           fullWidth