[代码片段]谷歌的一个不错的CSS样式，不得不说大厂的前端设计师美感就是好。

.outer-div{
background: linear-gradient(90deg,#34a853 4%,#4285f4 0%) top/100% 34% no-repeat,linear-gradient(90deg,#fbbc04 50%,#4285f4 0%) top/100% 82% no-repeat,linear-gradient(90deg,#fbbc04 10%,#ea4335 0%) top/100% 100%; 
width: 200px; 
/* set width yourself */
height: 350px;
/* set height yourself */
padding: 4px;
/* default padding is 4px, you can set any value that makes you feel good */
border-radius: 8px;
/* outer-div's border-radius must be twice larger than the inner-div */
}


.inner-div {
width: 100%;
height: 100%;
border-radius: 4px;
/* inner-div's border-radius must be twice lower than the outer-div */
}