Enhance high-contrast theme styles and improve blog and footer aesthetics

- Added text decoration to links in high-contrast mode for better visibility.
- Updated blog post items with a black background, white text, and improved link styles.
- Styled the "Read More" button with a yellow background and black text.
- Enhanced HTML block content with consistent background and text colors.
- Revamped footer styles, including newsletter form and contact links, to ensure readability and accessibility.

.vscode/ftp-kr.sync.cache.json

@@ -98,7 +98,7 @@
     },
     "google-merchant_id-1.xml": {
       "type": "-",
-      "size": 18798984,
+      "size": 18937633,
       "lmtime": 0,
       "modified": true
     },