**Bold text** or __Bold text__
*Italic text* or _Italic text_
***Bold and italic*** or ___Bold and italic___
~~Strikethrough text~~
`Inline code`

This is a paragraph with **bold**, *italic*, and `code` text.

# Header 1
## Header 2  
### Header 3
#### Header 4
##### Header 5
###### Header 6

- Item 1
- Item 2
  - Nested item
  - Another nested item
- Item 3

* Alternative syntax
+ Another alternative

1. First item
2. Second item
   1. Nested item
   2. Another nested item
3. Third item

1. Lists can start with any number
5. The numbers don't need to be sequential
2. Markdown will auto-number them

- [x] Completed task
- [ ] Incomplete task
- [x] Another completed task
  - [ ] Nested task
  - [x] Completed nested task

[Link text](https://example.com)
[Link with title](https://example.com "Tooltip text")

Auto-links: https://example.com
Email links: <email@example.com>

[Link text][reference-id]
[Another link][1]

[reference-id]: https://example.com
[1]: https://example.com "Optional title"

[Other memo](/docs/guides/getting-started)
[Specific section](/docs/guides/content-syntax#headers)

![Alt text](https://example.com/image.png)
![Alt text](https://example.com/image.png "Optional title")

[![Alt text](image.png)](https://example.com)

Use `const` for constant values.
File paths like `/etc/hosts` are formatted as code.

```
Plain code block without syntax highlighting
```

```javascript
function greet(name) {
  return `Hello, ${name}!`;
}

const message = greet('World');
console.log(message);
```

```bash
#!/bin/bash
echo "Shell script"
```

```python
def hello_world():
    print("Hello, World!")
```

```sql
SELECT * FROM users WHERE active = true;
```

```yaml
version: '3.8'
services:
  memos:
    image: neosmemo/memos:stable
```

```json
{
  "name": "memos",
  "version": "1.0.0"
}
```

```dockerfile
FROM alpine:latest
RUN apk add --no-cache ca-certificates
```

```javascript title="example.js"
// Code with title
const greeting = "Hello World";
```

```bash showLineNumbers
# Code with line numbers
npm install
npm start
```

| Column 1 | Column 2 | Column 3 |
|----------|----------|----------|
| Row 1    | Data     | More data |
| Row 2    | Data     | More data |

| Left | Center | Right |
|:-----|:------:|------:|
| L    |   C    |     R |

> This is a blockquote.
> 
> It can span multiple lines.

> **Note:** You can use other markdown inside blockquotes.
> 
> - Including lists
> - And other elements

Three or more hyphens:
---

Three or more asterisks:
***

Three or more underscores:
___

#work #project #urgent
#personal #ideas
#tech #programming #javascript

@username mentioned in this memo
Reference another memo: [[memo-title]]

Current time: {{NOW}}
Specific date: {{2025-08-19}}

{{VARIABLE_NAME}} will be replaced with defined values

The quadratic formula is $x = \frac{-b \pm \sqrt{b^2-4ac}}{2a}$.

$$
\begin{aligned}
\nabla \times \vec{\mathbf{B}} -\, \frac1c\, \frac{\partial\vec{\mathbf{E}}}{\partial t} &= \frac{4\pi}{c}\vec{\mathbf{j}} \\
\nabla \cdot \vec{\mathbf{E}} &= 4 \pi \rho \\
\nabla \times \vec{\mathbf{E}}\, +\, \frac1c\, \frac{\partial\vec{\mathbf{B}}}{\partial t} &= \vec{\mathbf{0}} \\
\nabla \cdot \vec{\mathbf{B}} &= 0
\end{aligned}
$$

```mermaid
graph TD
    A[Start] --> B{Is it working?}
    B -->|Yes| C[Great!]
    B -->|No| D[Debug]
    D --> B
    C --> E[End]
```

```mermaid
sequenceDiagram
    participant U as User
    participant M as Memos
    participant D as Database
    
    U->>M: Create memo
    M->>D: Save data
    D-->>M: Confirm
    M-->>U: Success response
```

```mermaid
gitgraph
    commit id: "Initial"
    branch develop
    checkout develop
    commit id: "Feature A"
    checkout main
    commit id: "Hotfix"
    checkout develop
    commit id: "Feature B"
    checkout main
    merge develop
```

![YouTube Video](https://www.youtube.com/watch?v=VIDEO_ID)

[Embed: Website Title](https://example.com)

<details>
<summary>Click to expand</summary>

This content is hidden by default.

</details>

<kbd>Ctrl</kbd> + <kbd>C</kbd> for copy

<mark>Highlighted text</mark>

<sub>Subscript</sub> and <sup>Superscript</sup>