heti/lib/modifiers/writing-mode.scss

// Author: Sivan [sun.sivan@gmail.com]
// Description: define writing mode styles.
@import "../variables";

@mixin hetiWritingModeModifier {
  // 定义垂直布局
  &--vertical {
    max-width: none;
    max-height: $line-length;
    writing-mode: vertical-rl;
    letter-spacing: 0.125em;

    h1,
    h2,
    h3,
    h4,
    h5,
    h6 {
      text-align: start;
    }

    // 默认无论简繁都采用台湾规范，修改只需重新定义变量 `$chinese-quote-set` 即可。
    q {
      quotes: map-get(map-get($chinese-quote-presets, $chinese-quote-set), "vertical");
    }
  }
}