当我变窄的时候，下方就有空白了。我想让他无论变窄还是怎样都能保持充满整个页面。该怎么调整，贴代码上来给各位大牛指点一下。
body{ font-family: "Microsoft Yahei","微软雅黑",'Arial',sans-serif; height: 100%; width: 100%; background-image:url("../Photo/web_wechat_login_bg28a2f7.jpg"); background-size:cover; background-repeat: no-repeat;}
background-size: 100% 100%;
background-size: 100% 100%;
这个不行，变得更加空白了
html { height: 100%;}body { height: 100%; background-image: url("Pictures.jpg"); background-repeat: no-repeat; background-size: 100% 100%;}
html { height: 100%;}body { height: 100%; background-image: url("Pictures.jpg"); background-repeat: no-repeat; background-size: 100% 100%;}
html { height: 100%;}body { height: 100%; background-image: url("Pictures.jpg"); background-repeat: no-repeat; background-size: 100% 100%;}
html { height: 100%;}body { height: 100%; background-image: url("Pictures.jpg"); background-repeat: no-repeat; background-size: 100% 100%;}
