index.less

@import "~antd/lib/style/themes/default.less";

.input {
  transition: width .3s, margin-left .3s;
  width: 0;
  background: transparent;
  border-radius: 0;
  :global(.ant-select-selection) {
    background: transparent;
  }
  input {
    border: 0;
    padding-left: 0;
    padding-right: 0;
    box-shadow: none !important;
  }
  &,
  &:hover,
  &:focus {
    border-bottom: 1px solid @border-color-base;
  }
  &.show {
    width: 210px;
    margin-left: 8px;
  }
}