修改后的样式：

代码：

代码在App.vue中，因为其他页面中添加了<style  lang="scss" scoped>,我将App.vue作为了公共样式

$colorTime:#45f0ea;
body{

  // 时间选择整体,选择下拉
  .el-picker-panel{
      background: url(~@/assets/images/rigt_con_bg.png) no-repeat !important;
      color: $colorTime !important;
      border-color: $colorTime !important;
    }
  //时间选择内容头部
   .el-date-picker__header--bordered{
    border-bottom: 1px solid $colorTime !important;
  }
  // 左右箭头
  .el-picker-panel__icon-btn, .el-date-picker__header-label{
    color:$colorTime !important;
  }
  //年，月
  .el-year-table td .cell,.el-month-table td .cell{
    color:$colorTime;
    font-size: 14px;
  }
  //年月选中/滑过样式
  .el-year-table td .cell:hover, .el-year-table td.current:not(.disabled) .cell,.el-year-table td.today .cell,
  .el-month-table td .cell:hover, .el-month-table td.current:not(.disabled) .cell,.el-month-table td.today .cell{
    color: #fff !important; 
    background-color: #01ccff !important;
    border-radius: 4px !important;
    font-size: 15px !important;
    width: 60px;
    text-align: center;
  }
}