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/components/layout/breadcrumb.tsx

@@ -1,7 +1,7 @@
 'use client';
 
 import Link from 'next/link';
-import { ChevronRight, Home } from 'lucide-react';
+import { ChevronRight, Home, ArrowLeft } from 'lucide-react';
 
 interface BreadcrumbItem {
   label: string;
@@ -10,20 +10,31 @@ interface BreadcrumbItem {
 
 interface BreadcrumbProps {
   items: BreadcrumbItem[];
+  showBackButton?: boolean;
+  onBackClick?: () => void;
 }
 
-export function Breadcrumb({ items }: BreadcrumbProps) {
+export function Breadcrumb({ items, showBackButton = false, onBackClick }: BreadcrumbProps) {
   return (
-    <nav aria-label="breadcrumb" className="flex items-center space-x-2 text-sm text-[#5C5C5C] py-4">
-      <Link href="/" className="flex items-center hover:text-[#C41E3A] transition-colors">
+    <nav aria-label="breadcrumb" className="flex items-center space-x-2 text-sm text-[#4A4A4A] py-4 px-4 md:px-0">
+      {showBackButton && (
+        <button
+          onClick={onBackClick}
+          className="flex items-center mr-2 hover:text-[#C41E3A] transition-colors focus:outline-none focus:ring-2 focus:ring-[#C41E3A] focus:ring-offset-2"
+          aria-label="返回"
+        >
+          <ArrowLeft className="w-5 h-5" />
+        </button>
+      )}
+      <Link href="/" className="flex items-center hover:text-[#C41E3A] transition-colors focus:outline-none focus:ring-2 focus:ring-[#C41E3A] focus:ring-offset-2 rounded" aria-label="首页">
         <Home className="w-4 h-4" />
       </Link>
       {items.map((item, index) => (
         <div key={index} className="flex items-center">
-          <ChevronRight className="w-4 h-4 text-[#E5E5E5]" />
+          <ChevronRight className="w-4 h-4 text-[#E5E5E5] flex-shrink-0" aria-hidden="true" />
           <Link
             href={item.href}
-            className="ml-2 hover:text-[#C41E3A] transition-colors"
+            className="ml-2 hover:text-[#C41E3A] transition-colors focus:outline-none focus:ring-2 focus:ring-[#C41E3A] focus:ring-offset-2 rounded truncate max-w-[120px] md:max-w-none"
           >
             {item.label}
           </Link>

src/components/layout/footer.tsx

@@ -22,6 +22,20 @@ export function Footer() {
             <p className="text-[#5C5C5C] text-sm leading-relaxed mb-6">
               {COMPANY_INFO.description}
             </p>
+            <div className="mt-6 pt-6 border-t border-[#E5E5E5]">
+              <p className="text-sm text-[#5C5C5C] mb-3 font-medium">关注公众号</p>
+              <div className="inline-block bg-white p-3 rounded-lg border border-[#E5E5E5] shadow-sm hover:shadow-md transition-shadow duration-200">
+                <Image 
+                  src="/images/qrcode_for_gh_a297181ff548_258.jpg" 
+                  alt="微信公众号二维码" 
+                  width={120}
+                  height={120}
+                  className="w-[120px] h-[120px]"
+                  loading="lazy"
+                />
+              </div>
+              <p className="text-xs text-[#718096] mt-2">扫码关注获取最新资讯</p>
+            </div>
           </div>
 
           <div>
@@ -99,6 +113,28 @@ export function Footer() {
               </Link>
             </div>
           </div>
+          
+          <div className="text-center mt-4 pt-4 border-t border-[#E5E5E5]">
+            <div className="flex flex-col sm:flex-row justify-center items-center gap-2 sm:gap-4 text-xs text-[#718096]">
+              <a 
+                href="https://beian.miit.gov.cn/" 
+                target="_blank" 
+                rel="noopener noreferrer"
+                className="hover:text-[#C41E3A] transition-colors"
+              >
+                {COMPANY_INFO.icp}
+              </a>
+              <span className="hidden sm:inline">|</span>
+              <a 
+                href="http://www.beian.gov.cn/" 
+                target="_blank" 
+                rel="noopener noreferrer"
+                className="hover:text-[#C41E3A] transition-colors"
+              >
+                {COMPANY_INFO.police}
+              </a>
+            </div>
+          </div>
         </div>
       </div>
     </footer>

src/components/layout/header.tsx

@@ -290,9 +290,27 @@ function HeaderContent() {
   );
 }
 
+function HeaderFallback() {
+  return (
+    <header className="fixed top-0 left-0 right-0 z-50 bg-transparent">
+      <div className="container-wide">
+        <div className="flex items-center justify-between h-16">
+          <div className="h-8 w-8 bg-gray-200 animate-pulse rounded" />
+          <nav className="hidden md:flex items-center gap-1">
+            {[1, 2, 3, 4, 5].map((i) => (
+              <div key={i} className="h-6 w-16 bg-gray-200 animate-pulse rounded mx-1" />
+            ))}
+          </nav>
+          <div className="h-9 w-20 bg-gray-200 animate-pulse rounded" />
+        </div>
+      </div>
+    </header>
+  );
+}
+
 export function Header() {
   return (
-    <Suspense fallback={<div className="h-16" />}>
+    <Suspense fallback={<HeaderFallback />}>
       <HeaderContent />
     </Suspense>
   );