固定背景图片

body{

background-color: rgba(0, 0, 0, 0);

background-position-x: 0%;

background-position-y: 0%;

background-repeat: repeat;

background-attachment: fixed;

background-image: linear-gradient(45deg, rgb(233, 30, 99), rgb(156, 39, 176));

background-size: auto;

background-origin: padding-box;

background-clip: border-box;

}