h2标题自动消失，求解
/*第二屏*/
.gray-section{
background:#252F34;
color:#fff;
}
.article-preview:nth-child(odd){
background:rgba(255,255,255,0.05);
}
/*图片区域*/
.gray-section .img-section{
width:45%;
}
.img-section img{
width:100%;
}
.article-preview > div{
float:left;
}
/*清除浮动*/
.article-preview:after{
content:'';
display:block;
clear:both;
}
/*文字区域*/
.gray-section .text-section{
width:55%;
}
.text-section{
position:relative;
top:68px;
left:50px;
}
.text-section h2{
margin-bottom:20px;
}
.text-section p{
font-size:18px;
letter-spacing:1px;
}
.text-section .sub-heading{
font-size:22px;
margin-top:0;
}
.text-section > *{
max-width:90%;
}
各位年薪80w的童靴，这是什么问题啊，按照老师的教程，给
.article-preview > div{
float:left;
}
这个加font-size:0; 结果h2标题就会消息，求看看 是代码哪里有问题
