feat: 样式调整

src/components/BaseFooter.astro

@@ -1,8 +1,12 @@
 ---
+import { metadata } from "../consts";
+
+const year = new Date().getFullYear();
 ---
 
 <footer>
   <div class="content">
+    <span>© 2026 {metadata.siteTitle}</span>
     <a target="_blank" href="https://beian.miit.gov.cn/#/Integrated/index">
       备案号：鄂ICP备2023000060号-2
     </a>
@@ -12,22 +16,23 @@
 
 <style>
   footer {
-    background: #ffffff;
+    background: #22252b;
     height: 70px;
     overflow: hidden;
     flex-shrink: 0;
-    box-shadow: rgba(0, 0, 0, 0.05) 0px 1px 2px 2px;
+    box-shadow: var(--shadow);
   }
 
   .content {
     max-width: var(--layout-width);
     margin: 0 auto;
-    color: #1f2937;
+    color: #fff;
     display: flex;
     align-items: center;
     height: 100%;
     font-size: 14px;
     justify-content: center;
+    gap: 12px;
   }
 
   :global(.dark) footer {