代码如下：&lt。DOCTYPE html&gt；&lt；html lang=&quot；en&quot；&gt；&lt；head&gt；&lt；meta charset=&quot；utf-8&quot；&gt；&lt；css3。代码如下：/*；* HTML5 ？ Boilerplate。*；* What follows is the result of much research on cross-browser styling。* Credit left inline and big thanks to Nicolas Gallagher.Jonathan Neal。* Kroc Camen.and the H5BP dev community and team。*；