更新

• • Quarto 1.3版**允许使用sidebar-width、body-width、margin-width和gutter-width选项设置边栏宽度、文档正文、文档边距以及这些元素（装订线）之间的边距。

sidebar-width、body-width和margin-width应该以像素（px）为单位指定，gutter-width可以以像素或其他单位（如em或rem）为单位指定。也可以使用SCSS变量。有关详细信息，请阅读来自quarto docs的文章网格定制。

• _四开本. yml*

project:
    type: website
  
website:
  title: "Big Center Section"
  sidebar:
    style: "docked"
    search: false
    contents:
      - section: "Sidebar"
        contents:
          - index.qmd

format:
  html:
    grid: 
      body-width: 2000px
      sidebar-width: 200px
      margin-width: 200px
    toc: true

旧答案

我们可以通过将width设置为#quarto-document-content的2000px来增加内容列的宽度（同时更改右侧边栏的边距以将其向右推）

• _四开本. yml*

project:
    type: website
  
website:
  title: "Big Center Section"
  sidebar:
    style: "docked"
    search: false
    contents:
      - section: "Sidebar"
        contents:
          - index.qmd

format:
  html:
    toc: true
    css: styles.css

• • 索引. qmd**

---
title: "Big wide middle section"
jupyter: python3
format:
    html:
      code-fold: true
      code-line-numbers: true
---

# SOME REALLY REALLY REALLY LONG HEADING I WANT 2000px WIDE.....

# SOME REALLY REALLY REALLY LONG HEADING I WANT 2000px WIDE.....

# SOME REALLY REALLY REALLY LONG HEADING I WANT 2000px WIDE.....

• • 样式. css**

/* css styles */

#quarto-document-content {
  width: 2000px;
}

#quarto-margin-sidebar {
  margin-right: -600px;
  margin-left: 500px;
}

(Note我已经缩小了这个网站页面的截图）