错误:“…m 55%在右侧”后无效CSS

我在style.scss中编写了以下代码:

Error: Invalid CSS after "...m 55% at right,": expected expression (e.g. 1px, bold), was "#2222, #0000) borde" on line 1939 of sass/c:\Users\Administrator\Desktop\desc\user.scss >> ound: radial-gradient(.3rem 55% at right, #2222, #0000) border-box, #fff paddi

background: radial-gradient(.3rem 55% at right, #2222, #0000) border-box, #fff padding-box;

我可以问一下如何解决这个错误吗?