feat(css): 实现现代化毛玻璃效果和动态主题系统

- 引入CSS变量系统，定义完整的色彩和样式变量
- 应用radial-gradient和linear-gradient创建动态背景效果
- 实现backdrop-filter毛玻璃效果，增强视觉层次感
- 添加悬停交互反馈和过渡动画
- 统一文字颜色和背景透明度处理
- 优化移动端显示效果和响应式设计
- 增强阴影效果和边框样式一致性
- 添加orbit轨道动画和相位控制
- 改进渐变色应用和文本填充效果
- 优化技术栈标签云的视觉表现

data/github_user.json

@@ -0,0 +1,19 @@
+{
+  "login": "listener-He",
+  "id": 39252579,
+  "node_id": "MDQ6VXNlcjM5MjUyNTc5",
+  "avatar_url": "https://avatars.githubusercontent.com/u/39252579?v=4",
+  "url": "https://api.github.com/users/listener-He",
+  "html_url": "https://github.com/listener-He",
+  "type": "User",
+  "name": "Honesty",
+  "blog": "https://www.hehouhui.cn",
+  "hireable": true,
+  "bio": "Honesty Shanghai Student",
+  "public_repos": 165,
+  "public_gists": 0,
+  "followers": 6,
+  "following": 12,
+  "created_at": "2018-05-14T02:57:55Z",
+  "updated_at": "2025-11-09T05:45:15Z"
+}