style(Footer): 优化页脚样式和布局

- 移除冗余的注释代码
- 使用 card-base 类统一卡片样式
- 调整间距和内边距

src/components/Footer.astro

@@ -28,9 +28,8 @@ try {
   
 <!--<div class="border-t border-[var(--primary)] mx-16 border-dashed py-8 max-w-[var(--page-width)] flex flex-col items-center justify-center px-6">-->
 <div class="transition border-t border-black/10 dark:border-white/15 my-10 border-dashed mx-32"></div>
-<!--<div class="transition bg-[oklch(92%_0.01_var(--hue))] dark:bg-black rounded-2xl py-8 mt-4 mb-8 flex flex-col items-center justify-center px-6">-->
-<div class="transition border-dashed border-[oklch(85%_0.01_var(--hue))] dark:border-white/15 rounded-2xl mb-12 flex flex-col items-center justify-center px-6">
-    <div class="transition text-50 text-sm text-center">
+<div class="card-base w-fit mx-auto rounded-xl mt-4 mb-4">
+    <div class="transition text-50 text-sm text-center p-6">
         &copy; <span id="copyright-year">2024 - {currentYear}</span> <a class="transition link text-[var(--primary)] font-medium" target="_blank" href="https://space.bilibili.com/325903362"> {profileConfig.name} </a>，采用
         <a class="transition link text-[var(--primary)] font-medium" target="_blank" href="https://creativecommons.org/licenses/by-nc-sa/4.0/">CC BY-NC-SA 4.0</a> 许可
         <br>