css 圆形边框border

css 圆形边框颜色占卜不一致

by blackts

HTML

<div class='circle'>
</div>

CSS

.circle {
    width: 300px; height: 300px;
    border-radius: 50%;
    position: relative;
    overflow: hidden;
    mask: radial-gradient(transparent 110px, #000 110px);
    -webkit-mask: radial-gradient(transparent 110px, #000 110px);
}
.sector-group {
    filter: blur(15px);
    transform: scale(1.2);
}