.box{ width:100%; background: url(../img/bg.png) no-repeat; background-size: 100% 100%; position: absolute; z-index: -1; top: 0; left: 0; right: 0; }
页面中如何实现背景图100%铺满全屏
原文:https://www.cnblogs.com/xi-jie/p/13667880.html