init: 初始化 VitePress 官网项目

docs/.vitepress/theme/pages/NotFound.vue

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+<template>
+  <div class="min-h-screen flex flex-col items-center justify-center bg-apple-grey px-6">
+    <div class="text-center">
+      <h1 class="text-9xl font-bold text-apple-dark mb-4">404</h1>
+      <h2 class="text-2xl font-semibold text-apple-dark mb-4">页面未找到</h2>
+      <p class="text-apple-text-gray mb-8 max-w-md">
+        抱歉，您访问的页面不存在。可能已被移动或删除。
+      </p>
+      <a
+        href="/"
+        class="inline-flex items-center px-6 py-3 bg-apple-blue text-white rounded-full font-medium hover:bg-apple-blue-hover transition-colors"
+      >
+        返回首页
+      </a>
+    </div>
+  </div>
+</template>