css秒针旋转

.box {
    width: 400px;
    height: 400px;
    border-radius: 50%;
    border: 1px solid #000;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}
.point {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background-color: #000;
}
@keyframes rotate1 {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}
.line {
    position: absolute;
    margin-left: -4px;
    left: 50%;
    bottom: 50%;
    width: 8px;
    height: 160px;
    background-color: #000;
    animation: rotate1 60s linear infinite;
    transform-origin: 50% 100%;
}

<div class="box">
    <div class="point"></div>
    <div class="line"></div>
</div>