[fix] fix some problem in code style

components/mdx/H2.tsx

@@ -1,6 +1,6 @@
 const H2 = (props: JSX.IntrinsicElements["h2"]) => {
   return (
-    <h2 className={"caption-font mt-6 mb-2 scroll-mt-20"} id={props.id}>
+    <h2 className={"caption-font mt-6 mb-2 scroll-mt-20 text-[1.45rem]"} id={props.id}>
       {props.children}
     </h2>
   );

components/reader-page/PostRender.tsx

@@ -19,7 +19,7 @@ export const PostRender = (props: {
       <div className="border-black border-b-2 pb-1 dark:border-gray-300">
         <div
           className={
-            "caption-font my-2 flex justify-center whitespace-normal break-words font-bold text-[1.8rem] text-black leading-[2.1rem] dark:text-white"
+            "caption-font my-2 flex justify-center whitespace-normal break-words font-bold text-[1.65rem] text-black leading-[2.1rem] dark:text-white"
           }
         >
           {props.frontMatter?.title}