使用clip完成透明背景图裁剪，不会影响文本。

给sheet右侧600px往后设置背景

.background {
  width: 64.29vw;
  height: 100%;
  left: 35.71vw;
  position: absolute;
  overflow: hidden;
}
.background > img {
  position: absolute;
  width: 100vw;
  height: 65.625rem;
  top: 0;
  left: -13.09vw;
  clip: rect(5.18vw, 77.38vw, 65.625rem, 13.01vw);
  opacity: 0.2;
}