bootstrap里面的代码：

h1,

h2,

h3,

h4,

h5,

h6,

.h1,

.h2,

.h3,

.h4,

.h5,

.h6 {

  font-family: inherit;

  font-weight: 500;

  line-height: 1.1;

  color: inherit;

}

输入标题，修改bootstrap代码没效果

<h1>Bootstrap标题一</h1>

<h2>Bootstrap标题二</h2>

<h3>Bootstrap标题三</h3>

<h4>Bootstrap标题四</h4>

<h5>Bootstrap标题五</h5>

<h6>Bootstrap标题六</h6>