add ridaisai countdown

.gitignore

@@ -33,4 +33,7 @@ yarn-error.log*
 # vercel
 .vercel
 
-package-lock.json
+package-lock.json
+
+# nvim
+.nvimlog

src/pages/Home/HeroView/Banner/index.tsx

@@ -3,11 +3,19 @@ import { BOUNCE, CUBIC_OUT, SWIFT } from 'src/utils/animations'
 import { fade, flip, pic } from './animations'
 import { T_AROUND, T_COVER, T_FLIP, T_PIC } from '../animations'
 
+const Center = styled.div`
+  width: 100%;
+  height: 50%;
+  min-height: 280px;
+  text-align: center;
+`
+
 export default function TopBanner() {
   return (
     <Banner>
       <Image></Image>
       <Names></Names>
+      <Center>理大祭まであと２日！(特設サイトに切り替わりますのでお楽しみに！)</Center>
     </Banner>
   )
 }