如何为所有Grid项目添加边框线条？

你可以直接给每个Grid项目外层包裹一个带边框样式的容器，替代原来用页面背景grid实现的方式，这样每个单元格都能正确显示边框。修改后的完整代码如下：

// template
#set page(height: 16.5cm, width: 18cm,
margin: (left: 1cm, right: 1cm, top: 1cm, bottom: 1cm))
#set text(14pt, fill: rgb("#444444"))

#let conf(
  authors: (),
  doc,
) = {
  let count = authors.len()
  let ncols = calc.min(count, 2)
  let nrows = 4
  
  set align(center)

  grid(
    columns: (1fr,) * ncols,
    rows: (1fr,) * nrows,
    row-gutter: 1cm,
    column-gutter: 1cm, // 添加上列间距，避免左右单元格边框重叠
    ..authors.map(author => [
      // 给每个项目套一个带边框的容器
      #block(
        height: 100%,
        width: 100%,
        stroke: (paint: silver, thickness: 1pt, dash: "dashed"),
        padding: 0.5cm, // 内容和边框之间留间距，提升美观度
        [
          #author.name \
          #author.affiliation \
          #link("mailto:" + author.email)
        ]
      )
    ])
  )
}

// values
#show: doc => conf(
  authors: (
    (
      name: "Theresa Tungsten",
      affiliation: "Artos Institute",
      email: "tung@artos.edu",
    ),
    (
      name: "Eugene Deklan",
      affiliation: "Honduras State",
      email: "e.deklan@hstate.hn",
    ),
    (
      name: "Eugene Deklan",
      affiliation: "Honduras State",
      email: "e.deklan@hstate.hn",
    ),
    (
      name: "Eugene Deklan",
      affiliation: "Honduras State",
      email: "e.deklan@hstate.hn",
    ),
  ),
  doc,
)

关键改动说明： #

• 移除了页面背景的grid，避免重复绘制边框导致的视觉错乱
• 给每个作者项外层添加block容器，直接通过stroke属性设置边框样式
• 新增column-gutter列间距，防止左右单元格边框重叠
• 添加padding让内容和边框之间保留留白，优化排版观感

内容的提问来源于stack exchange，提问作者mindlessgreen