css背景上有多个圆圈

<style>
    .circle-container {
        position: relative;
        width: 200px;
        height: 200px;
        background-color: #f2f2f2;
    }

    .circle-container::before {
        content: "";
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        width: 100px;
        height: 100px;
        background-color: #ff0000;
        border-radius: 50%;
    }

    .circle-container::after {
        content: "";
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        width: 80px;
        height: 80px;
        background-color: #00ff00;
        border-radius: 50%;
    }
</style>

<div class="circle-container"></div>