<style type=text/css>
   body {background-image:url(https://tk.illlt.com:759/api.php?type=手机端-动漫图片/动漫图片1分区) ;图片类型更换请修改参数  
   background-repeat:repeat;
   background-attachment:fixed;
   background-position:50% 50%;
   }
</style>