<p>
  山不在高，有仙则名。水不在深，有龙则灵。斯是陋室，惟吾德馨。苔痕上阶绿，草色入帘青。谈笑有鸿儒，往来无白丁。可以调素琴，阅金经。无丝竹之乱耳，无案牍之劳形。南阳诸葛庐，西蜀子云亭。孔子云：何陋之有？
</p>
p::first-line {
  color: red;
  font-weight: bold;
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.