cmc-web/packages/common/css/lib/button.scss

.el-button--text {
  padding: 0 !important;
}

.el-button.el-button--text [class*='el-icon-'] + span {
  margin-left: 2px;
}

.el-button--ghost {
  color: #666;
  background-color: #fff;
  border-color: #d9d9d9;
}

.el-button--ghost:focus,
.el-button--ghost:hover {
  color: #2b85e4;
  background-color: transparent;
  border-color: #2b85e4;
}

.el-button--ghost.is-disabled,
.el-button--ghost.is-disabled:active,
.el-button--ghost.is-disabled:focus,
.el-button--ghost.is-disabled:hover {
  color: #bbb;
  background-color: #f7f7f7;
  border-color: #d9d9d9;
}