layui 表格select下拉不显示全的问题

  .layui-table-cell{
              overflow: visible !important;
              }
              td .layui-form-select{
              margin-top: -6px;
              margin-left: -15px;
              margin-right: -15px;
              }
              .layui-form-select dl{
                z-index:9999;
              }
              .layui-table-box{
              overflow:visible;
              }

              .layui-table-body{
                overflow:visible;
              }