<style lang="less">
  .el-picker-panel {
    background: #0f0472a9 !important;
    color: #ffffff;
    border: 1px solid #93bee7 !important;
    line-height: 20px;
  }
  .el-picker-panel .el-date-range-picker__time-header {
    border-bottom: 1px solid #93bee7 !important;
  }
  .el-picker-panel__icon-btn {
  width: 8px;
  height: 10px;
  color: #cbd3f0 !important;
}
.el-picker-panel .el-input__inner {
  background-color: #19466f;
  border: #75ebf2;
  color: #e8fdff;
}
.el-date-picker__header-label {
  color: #6ce6cb !important;
}
.el-date-picker__header-label:hover {
  color: #ffffff;
}
.el-date-table td.disabled div {
  background-color: #6891cfa8 !important;
}
.el-picker-panel .el-date-table th {
  color: #c3e3ec;
}
.el-picker-panel .el-date-table td.available {
  font-size: 16px;
  font-weight: bold;
  color: #6ce6cb;
}
.el-picker-panel .el-date-table td.available:hover {
  color: #ffffff;
}

　　部分樣式在scope下無法生效，所以單獨寫了一個script

效果：

 參考連結：https://blog.csdn.net/weixin_43131046/article/details/119248963?utm_medium=distribute.pc_aggpage_search_result.none-task-blog-2~aggregatepage~first_rank_ecpm_v1~rank_v31_ecpm-1-119248963.pc_agg_new_rank&utm_term=.el-picker-panel__footer&spm=1000.2123.3001.4430