generated at
sectionを水平線で区切る
presentation modeで区切りとなる部分に水平線を引くUserCSS
Firefoxで使えるように、 border border-top に変えてある

style.css
.app:not(.presentation) .line.section-title:not(.line-title) { position: relative; } .app:not(.presentation) .line.section-title:not(.line-title) .text { padding-top: 1em; } .app:not(.presentation) .line.section-title:not(.line-title):before { content: ""; display: block; width: 111%; position: absolute; left: -49px; border-top: 1px lightgray solid; }

UserCSS