html代码如下
<body>/*此处内容省略*/</body>
使用css设置背景图片并且铺满整个屏幕(不重复),代码如下
body{/*设置背景图片*/background-image: url("../images/background/back.jpg") ;background-size: 100% 100%;background-size: cover;background-repeat: no-repeat;background-attachment: fixed; /*关键*/background-position: center;top:0;left: 0;width: 100%;height: 100%;min-width: 1600px;z-index: -10;zoom:1;}
效果图
![在这里插入图片描述](https://img-/9ce64877c601401dbde48aa6904e112f.png?x-oss-process=image/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAUGVhbnV0dHk=,size_20,color_FFFFFF,t_70,g_s
e,x_16)