51help TIY
码：
<!DOCTYPE HTML> <html> <head> <style type="text/css"> #topHeader{color:blue;} #important{color:green;} </style> </head> <body> <h1 id="topHeader">标题 1</h1> <p></p> <p id="important">的段落。:)</p> </body> </html>
查看结果: