如何仅使用css创建一条直线并围绕其中心旋转

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

.line {
  position: relative;
  width: 200px;
  height: 1px;
  background-color: black;
}

.line::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 1px;
  background-color: black;
  transform-origin: center;
  animation: rotate 5s linear infinite;
}

@keyframes rotate {
  0% {
    transform: translate(-50%, -50%) rotate(0deg);
  }
  100% {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}