refactor(splash): migrate simple styles to tailwind

src/app/splash/components/splash-content.tsx

@@ -1,14 +1,13 @@
 /**
  * Splash 主内容文案
  */
-import styles from "./splash-content.module.css";
 
 const APOSTROPHE = "'";
 
 export function SplashContent() {
   return (
-    <div className={styles.content}>
-      <h1 className={styles.title}>
+    <div className="z-[2] flex flex-col gap-md">
+      <h1 className="m-0 whitespace-pre-line text-left font-[var(--font-athelas)] text-[var(--responsive-page-title)] font-bold italic leading-[1.4] text-white">
         Welcome to my secret hideout~
         {"\n"}It{APOSTROPHE}s just the two of us now.
         {"\n"}Feel free to whisper your