DIV内嵌CSS:
<div style="width:98%;margin:auto;"> <div style="width:30%;height:300px;background-color:rgb(145, 176, 145);float:left;">111</div> <div style="width:40%;height:300px;background-color:rgb(118, 118, 221);float:left;">222</div> <div style="width:30%;height:300px;background-color:rgb(165, 100, 100);float:right;">333</div> </div>DIV居中:style="width:90%;margin:auto;" 111 222 333
CSS方式写法:https://blog.csdn.net/weixin_32309879/article/details/117859974