在style标签中不要加scoped

.el-tooltip__popper {
  max-width: 60% !important;
}
.el-tooltip__popper,
.el-tooltip__popper.is-dark {
  max-width: 60% !important;
  line-height: 24px;
  color: #fff !important;
  background-color: rgb(48, 65, 86) !important;
}