{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# dsh-notebook-v2 · 演示\n",
    "\n",
    "这个 notebook 用来给 README 截图。想看的三件事：\n",
    "\n",
    "- 左侧槽位的 `▾`：折叠 markdown 标题下面的所有格\n",
    "- 工具栏 `≡ 大纲`：右侧大纲，**拖内侧边缘可调宽**\n",
    "- 任意 markdown 格点一下进编辑，`Esc` 退出"
   ],
   "id": "cell-mw1t0zoc-j"
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 1. Markdown 与公式\n",
    "\n",
    "| 能力 | 状态 |\n",
    "|---|---|\n",
    "| 表格 / 任务列表 | ✅ |\n",
    "| 行内公式 $e^{i\\pi}+1=0$ | ✅ |\n",
    "| 代码块 | ✅ |\n",
    "\n",
    "- [x] md 标题折叠\n",
    "- [x] 大纲跳转\n",
    "- [ ] ipywidgets（v1 不做）"
   ],
   "id": "cell-mw1t0zoc-k"
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### 1.1 代码块\n",
    "\n",
    "```python\n",
    "def f(x):\n",
    "    return x ** 2\n",
    "```"
   ],
   "id": "cell-mw1t0zoc-l"
  },
  {
   "cell_type": "code",
   "metadata": {},
   "source": [
    "import sys, time\n",
    "\n",
    "for i in range(3):\n",
    "    print(f\"第 {i + 1} 行输出（流式到达）\", flush=True)\n",
    "    time.sleep(0.15)\n",
    "\n",
    "print(\"Python\", sys.version.split()[0])"
   ],
   "id": "cell-mw1t0zoc-m",
   "outputs": [],
   "execution_count": null
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 2. 输出渲染"
   ],
   "id": "cell-mw1t0zoc-n"
  },
  {
   "cell_type": "code",
   "metadata": {},
   "source": [
    "import math\n",
    "\n",
    "rows = [(\"π\", math.pi), (\"e\", math.e), (\"√2\", math.sqrt(2))]\n",
    "for name, value in rows:\n",
    "    print(f\"{name:>2} ≈ {value:.6f}\")"
   ],
   "id": "cell-mw1t0zoc-o",
   "outputs": [],
   "execution_count": null
  },
  {
   "cell_type": "code",
   "metadata": {},
   "source": [
    "%%bash\n",
    "echo \"Shell 格走独立子进程，不需要 Python 内核\"\n",
    "echo \"当前目录：$(pwd)\""
   ],
   "id": "cell-mw1t0zoc-p",
   "outputs": [],
   "execution_count": null
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 3. 大纲与折叠演示\n",
    "\n",
    "点 `## 3.` 这一行左边的 `▾`：下面的格会收起，只留一条「⋯ 已折叠 N 格 · 点击展开」。\n",
    "再点一次展开。"
   ],
   "id": "cell-mw1t0zoc-q"
  },
  {
   "cell_type": "code",
   "metadata": {},
   "source": [
    "answer = 6 * 7\n",
    "answer"
   ],
   "id": "cell-mw1t0zoc-r",
   "outputs": [],
   "execution_count": null
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### 3.1 被折叠的一小节\n",
    "\n",
    "折叠是**按标题层级**算的：折 `##` 会连里面的 `###` 一起收，但各自的折叠状态保留。"
   ],
   "id": "cell-mw1t0zoc-s"
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 4. 结束\n",
    "\n",
    "实现细节见 `AGENTS.md`，用法见 `README.md`。"
   ],
   "id": "cell-mw1t0zoc-t"
  }
 ],
 "nbformat": 4,
 "nbformat_minor": 5,
 "metadata": {}
}