antd中对话框宽度高度的调试

效果图是图一这样，图二我那个太长了，怎么让他分成两半呢 基于antd

antd@3.x的

import React, { useState } from 'react';
import {
  Modal,
  Form,
  Input,
  Tooltip,
  Icon,
  Cascader,
  Select,
  Row,
  Col,
  Checkbox,
  Button,
  AutoComplete,
  Table,
} from 'antd';

const { Option } = Select;
const AutoCompleteOption = AutoComplete.Option;

const formItemLayout = {
  labelCol: {
    xs: { span: 24 },
    sm: { span: 8 },
  },
  wrapperCol: {
    xs: { span: 24 },
    sm: { span: 16 },
  },
};
const tailFormItemLayout = {
  wrapperCol: {
    xs: {
      span: 24,
      offset: 0,
    },
    sm: {
      span: 16,
      offset: 8,
    },
  },
};
const dataSource = [
  {
    key: '1',
    name: '胡彦斌',
    age: 32,
    address: '西湖区湖底公园1号',
  },
  {
    key: '2',
    name: '胡彦祖',
    age: 42,
    address: '西湖区湖底公园1号',
  },
];

const columns = [
  {
    title: '姓名',
    dataIndex: 'name',
    key: 'name',
  },
  {
    title: '年龄',
    dataIndex: 'age',
    key: 'age',
  },
  {
    title: '住址',
    dataIndex: 'address',
    key: 'address',
  },
];

const CustomModal = (props) => {
  const { form } = props;
  const { getFieldDecorator } = form;
  const [list, setList] = useState([]);
  const [inform, setInform] = useState({});

  return (
    <Modal title="添加" visible footer={null} width={800}>
      <Row gutter={20}>
        <Col span={12}>
          <Form {...formItemLayout}>
            <Form.Item label="E-mail">
              {getFieldDecorator('名称', {
                initialValue: 'hello',
                rules: [
                  {
                    type: 'email',
                    message: 'The input is not valid E-mail!',
                  },
                  {
                    required: true,
                    message: 'Please input your E-mail!',
                  },
                ],
              })(<Input />)}
            </Form.Item>
            <Form.Item label="Password" hasFeedback>
              {getFieldDecorator('password', {
                initialValue: 'world',
                rules: [
                  {
                    required: true,
                    message: 'Please input your password!',
                  },
                ],
              })(<Input />)}
            </Form.Item>
            <Form.Item {...tailFormItemLayout}>
              <Button type="primary" htmlType="submit" size="small">
                添加
              </Button>
            </Form.Item>
          </Form>
        </Col>
        <Col span={12}>
          <Table pagination={false} dataSource={dataSource} columns={columns} bordered />
          <Button type="primary" size="small" style={{ marginTop: '25px' }}>
            提交订单
          </Button>
        </Col>
      </Row>
    </Modal>
  );
};

export default Form.create({ name: 'custom_modal' })(CustomModal);