Reapply "Fix/tailwindcss v4"

This reverts commit a9fd75d619.

src/components/DoubanCardSkeleton.tsx

@@ -5,12 +5,12 @@ const DoubanCardSkeleton = () => {
     <div className='w-full'>
       <div className='group relative w-full rounded-lg bg-transparent shadow-none flex flex-col'>
         {/* 图片占位符 - 骨架屏效果 */}
-        <ImagePlaceholder aspectRatio='aspect-[2/3]' />
+        <ImagePlaceholder aspectRatio='aspect-2/3' />
 
         {/* 信息层骨架 */}
         <div className='absolute top-[calc(100%+0.5rem)] left-0 right-0'>
           <div className='flex flex-col items-center justify-center'>
-            <div className='h-4 w-24 sm:w-32 bg-gray-200 rounded animate-pulse mb-2'></div>
+            <div className='h-4 w-24 sm:w-32 bg-gray-200 rounded-sm animate-pulse mb-2'></div>
           </div>
         </div>
       </div>