如何使用CSS制作折叠的丝带效果？

<div class="ribbon">
  <div class="ribbon-content">
    折叠的丝带效果
  </div>
</div>

.ribbon {
  position: relative;
  width: 200px;
  height: 50px;
  background-color: #f0f0f0;
  overflow: hidden;
}

.ribbon:before {
  content: "";
  position: absolute;
  top: 0;
  left: -50px;
  width: 100px;
  height: 100px;
  background-color: #ff0000;
  transform: rotate(45deg);
  transition: all 0.3s ease;
}

.ribbon:hover:before {
  left: 100%;
}

.ribbon-content {
  position: relative;
  z-index: 1;
  padding: 10px;
  color: #ffffff;
}