message: fixed: optimize style & remove useless style.
diff: cursor: pointer;
  }
  -.Datapicker__form {
  +.Datepicker__form {
  position: relative;
  }
  .Datepicker__calendar {
  width: 260px;
  - height: auto;
  - margin-top: 2px;
  + user-select: none;
  background-color: var(--color-bg-base);
  border: 1px solid var(--color-basic-gray);
  color: var(--color-text-default);
  left: 0;
  }
  -.Datapicker__transition {
  +.Datepicker__transition {
  padding: 6px 10px;
  cursor: pointer;
  }
  -.Datapicker__transition:hover {
  +.Datepicker__transition:hover {
  color: var(--color-text-anchor);
  }
  -.Datapicker__head {
  +.Datepicker__head {
  font-size: 16px;
  - padding-bottom: 2px;
  + margin-bottom: 2px;
  @apply --layout-between-center;
  }
  -.Datapicker__month {
  +.Datepicker__month {
  font-weight: 500;
  color: var(--color-text-primary);
  }
  -.Datapicker__month > b {
  +.Datepicker__month > span {
  font-weight: 700;
  }
  -.Datapicker__days {
  +.Datepicker__days {
  font-size: 12px;
  + display: grid;
  + grid-template-columns: repeat(7, 1fr);
  + grid-template-rows: 1fr;
  + margin-bottom: 4px;
  color: var(--color-text-secondary);
  - @apply --layout-between-center;
  }
  -.Datapicker__days > span {
  - width: 40px;
  - height: 26px;
  +.Datepicker__day {
  font-weight: 700;
  }
  -.Datapicker__days--sunday {
  +.Datepicker__day--sunday {
  color: var(--color-text-accent);
  }
  -.Datapicker__days--saturday {
  +.Datepicker__day--saturday {
  color: var(--color-text-anchor);
  }
  -.Datapicker__container {
  +.Datepicker__container {
  display: grid;
  - grid-template-columns: repeat(7, [col-start] 1fr [col-end]);
  - grid-template-rows: repeat(6, [col-start] 1fr [col-end]);
  + grid-template-columns: repeat(7, 1fr);
  + grid-template-rows: repeat(6, 20px);
  + align-items: stretch;
  + justify-items: stretch;
  }
  -.Datapicker__cell {
  - height: 20px;
  - line-height: 20px;
  +.Datepicker__cell {
  border-radius: 4px;
  + @apply --layout-center-center;
  }
  -.Datapicker__cell--today {
  +.Datepicker__cell--today {
  background-color: var(--color-bg-successLight);
  }
  -.Datapicker__cell--select {
  +.Datepicker__cell--selected {
  background-color: var(--color-bg-infoLight);
  }
  -.Datapicker__cell--secondary {
  - height: 20px;
  - line-height: 20px;
  - border-radius: 4px;
  +.Datepicker__cell--secondary {
  color: var(--color-text-secondary);
  }
  -.Datapicker__cell:hover {
  +.Datepicker__cell:hover {
  background-color: var(--color-bg-tertiaryLight);
  cursor: pointer;
  }
  \ No newline at end of file
  