<style>
.layui-table-cell,.layui-form,.layui-table-box,.layui-table-body{
overflow: visible;
}
/* 设置下拉框的高度与表格单元相同 */
td .layui-form-select{
margin-top: -10px;
margin-left: -15px;
margin-right: -15px;
}
</style>