`

--ul-unvote-li-radio { // 父级
    w: rem75(32);
    h: rem75(32);
    bd: rem75(1) solid #DDD0BA;
    pos: absolute;
    t: rem75(28);
    l: rem75(6);
    border-radius: 100%;
    -webkit-border-radius: 100%;
}

--ul-unvote-li-radio-before { // 子级
    w: rem75(20);
    h: rem75(20);
    border-radius: 100%;
    -webkit-border-radius: 100%;
    bg: #FF9100;
    content: '';
    pos: absolute;
    t: 50%;
    l: 50%;
    mt: rem75(-10);
    ml: rem75(-10);
}

`

Used hotcss px for calculation and replaced it with rem
The effect is as shown in the picture. The circle does not look round and the circle inside is not centered. Please give me an answer