字母间距

h2 {
  /* adds a 1px space horizontally between each letter;
     also known as tracking */
  letter-spacing: 1px;
}

letter-spacing 属性用于指定文本中字符之间的空格。

! 字母间距也支持负值:

p {
  letter-spacing: -1px;
}

资源: https : //developer.mozilla.org/en-US/docs/Web/CSS/letter-spacing