.home_left{
	background: url("../images/home/home_left28.png");
	background-size: cover;
	height:100%;
	padding:0;
}

body{
	background: url("../images/111.jpg");
    background-size: cover;
    display: flex;
    align-items: center; /*定义body的元素垂直居中*/
    justify-content: center; /*定义body的里的元素水平居中*/
}