Some wordpress css styles cannot be loaded

Before the wordpressthesis topic, some background styles cannot be loaded on Firefox, but some css styles Use https,

Some background styles cannot be loaded on firefox before the wordpress thesis topic

The site is http, but https is used for some css styles,

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Some background styles cannot be loaded on firefox before the wordpress thesis topic

The site is http, but https is used for some css styles,

Whether the css address can be loaded directly

I think there seems to be a. tw in your link.
Is this website backed up?

This is a server problem. The previous server bought ssl and the ip address bound to the server domain name is incomplete, which leads to a route problem. Thank you for your answers.