一款非常好看的彩色背景框样式

{
    background: linear-gradient(#fff 0 0) padding-box,linear-gradient(45deg,#9161fb,#ff5a5a) border-box;
    border: 1px solid transparent;
    border-radius: 5px;
    border-top: 2px solid transparent;
    margin: 20px 0;
    padding: 20px;
}