feat: 添加移动端适配和测试功能

refactor(layout): 优化页脚布局和备案信息展示
feat(constants): 添加ICP备案和公安备案信息
feat(header): 实现移动端加载时的骨架屏效果
style(globals): 调整文字颜色和添加移动端响应样式
feat(breadcrumb): 增加返回按钮和响应式优化
feat(e2e): 添加移动端测试工具和测试用例
docs: 添加页脚重设计文档

src/app/globals.css

@@ -38,9 +38,9 @@
   
   /* 文字色系 - 墨色层次 */
   --color-text-primary: #1C1C1C;
-  --color-text-secondary: #3D3D3D;
-  --color-text-tertiary: #5C5C5C;
-  --color-text-muted: #8C8C8C;
+  --color-text-secondary: #2D2D2D;
+  --color-text-tertiary: #4A4A4A;
+  --color-text-muted: #6B6B6B;
   
   /* 边框色系 */
   --color-border-primary: #E5E5E5;
@@ -211,12 +211,38 @@
   
   input:focus, textarea:focus {
     outline: none;
+    box-shadow: 0 0 0 3px rgba(196, 30, 58, 0.3);
+  }
+  
+  button:focus-visible, a:focus-visible {
+    outline: 2px solid #C41E3A;
+    outline-offset: 2px;
   }
   
   ::selection {
     background-color: var(--color-text-primary);
     color: var(--color-bg-primary);
   }
+  
+  @media (prefers-contrast: high) {
+    :root {
+      --color-text-primary: #000000;
+      --color-text-secondary: #1A1A1A;
+      --color-text-tertiary: #2A2A2A;
+      --color-border-primary: #000000;
+      --color-border-secondary: #1A1A1A;
+    }
+  }
+  
+  @media (prefers-reduced-motion: reduce) {
+    *,
+    *::before,
+    *::after {
+      animation-duration: 0.01ms !important;
+      animation-iteration-count: 1 !important;
+      transition-duration: 0.01ms !important;
+    }
+  }
 }
 
 @layer utilities {