LangBot/web/src/app/not-found.tsx

'use client';

import { Button, Typography, Space, Layout, Row, Col, Result } from 'antd';
import { useRouter } from 'next/navigation';

const { Title, Paragraph } = Typography;

export default function NotFound() {
  const router = useRouter();

  return (
    <Layout style={{ minHeight: '100vh', background: 'white' }}>
      <Row justify="center" align="middle" style={{ minHeight: '100vh' }}>
        <Col xs={22} sm={20} md={18} lg={14} xl={10}>
          <div
            className="error-container"
            style={{ width: '100%', padding: '20px 0', textAlign: 'center' }}
          >
            <div
              className="error-card"
              style={{
                display: 'flex',
                flexDirection: 'column',
                alignItems: 'center',
                padding: '24px',
              }}
            >
              {/* Ant Design 图标，可以换成 Langbot 的 Logo */}
              <div
                style={{
                  marginBottom: '20px',
                  maxWidth: '100%',
                  height: 'auto',
                }}
              >
                <Result
                  status="404"
                  title={null}
                  subTitle={null}
                  style={{ padding: 0 }}
                />
              </div>

              <div
                className="error-text"
                style={{ textAlign: 'center', marginBottom: '24px' }}
              >
                <Title
                  level={1}
                  style={{
                    margin: '0 0 16px 0',
                    fontSize: '72px',
                    fontWeight: 'bold',
                    color: '#333',
                  }}
                >
                  404
                </Title>
                <Title
                  level={3}
                  style={{
                    margin: '0 0 8px 0',
                    fontWeight: 'normal',
                    color: '#333',
                  }}
                >
                  页面不存在
                </Title>
                <Paragraph
                  style={{
                    fontSize: '16px',
                    color: '#666',
                    maxWidth: '450px',
                    margin: '0 auto 32px auto',
                  }}
                >
                  您要查找的页面似乎不存在。请检查您输入的 URL
                  是否正确，或者返回首页。
                </Paragraph>
              </div>

              <div className="error-button" style={{ marginBottom: '24px' }}>
                <Space>
                  <Button
                    type="primary"
                    style={{
                      backgroundColor: '#2288ee',
                      borderColor: '#2288ee',
                      borderRadius: '4px',
                      height: '36px',
                      padding: '0 16px',
                    }}
                    onClick={() => router.back()}
                  >
                    上一级
                  </Button>
                  <Button
                    style={{
                      borderColor: '#d9d9d9',
                      borderRadius: '4px',
                      height: '36px',
                      padding: '0 16px',
                    }}
                    onClick={() => router.push('/')}
                  >
                    返回主页
                  </Button>
                </Space>
              </div>

              <div
                className="error-support"
                style={{ textAlign: 'center', marginTop: '16px' }}
              >
                <Paragraph style={{ fontSize: '14px', color: '#666' }}>
                  需要帮助吗？您可以联系{' '}
                  <a
                    href="mailto:support@qq.com"
                    style={{ color: '#000', textDecoration: 'none' }}
                  >
                    support@qq.com
                  </a>
                </Paragraph>
              </div>
            </div>
          </div>
        </Col>
      </Row>
    </Layout>
  );
}