Bug: 标题样式不一致，白天背景闪烁

<img width="1748" height="464" alt="Image" src="https://github.com/user-attachments/assets/da71b789-f8b7-4dd0-af1b-4238754a7473" />
顶部标题栏对齐设置不一致，一个上对齐，一个居中对齐

刚进白天文档站时会先闪烁出云朵背景，再遮盖灰色背景
<img width="2496" height="1194" alt="Image" src="https://github.com/user-attachments/assets/a9fa6f0b-c791-4865-8492-c582a05bfba6" />