html,body{
    width: 100%;
    height: 100%;
    padding: 0;
    margin: 0;
    background: #fff;
}
.app_big_box{
    max-width: 1310px;
    width: 100%;
	margin: auto;
    padding: 0px 50px;
    min-width: 1000px;
	box-sizing: border-box;
}