box-sizing重置

html {
  /*-webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;*/
  box-sizing: border-box;
}
*, *:before, *:after {
  /*-webkit-box-sizing: inherit;
  -moz-box-sizing: inherit;*/
  box-sizing: inherit;
}

所有元素使用border-box, 并且允许元素修改其box-sizing

 

 

 

 

 出处:https://css-tricks.com/inheriting-box-sizing-probably-slightly-better-best-practice/