时间:2021-07-01 10:21:17 帮助过:39人阅读
background-size,第一个90%是宽,第二个90%是高
“ / ” 后面的背景属性是CSS3新增的,有三个:[ background-size] [background-origin] [background-clip];
background: [background-color] [background-image] [background-repeat] [background-attachment] [background-position] / [ background-size] [background-origin] [background-clip];