修改后样式：

 生效代码：

// 右侧文本样式
::v-deep .el-timeline-item__content {
  margin-left: 40%;
  width: 60%;
  //   height: 50px;
  padding-top: 5px;
}
// 时间样式
::v-deep .el-timeline-item__timestamp.is-bottom {
  position: absolute;
  top: 0;
  margin-left: 8%;
}
::v-deep .el-timeline-item__timestamp {
  height: 25px;
  font-family: PingFangSC-Regular;
  font-size: 18px;
  font-weight: normal;
  font-stretch: normal;
  letter-spacing: 0px;
  color: #666666;
}
// 竖线样式
::v-deep .el-timeline-item__tail {
  position: absolute;
  top: 5px;
  left: 36%;
  height: 100%;
  width: 2px;
  opacity: 0.2;
  border-left: solid 3px #fd3c3c;
}
// 圆点样式
::v-deep .el-timeline-item__node--normal {
  left: 35%;
  width: 20px;
  height: 20px;
  background: url('../../img/radio-red.png') 0 0 /100% 100%;
}