标题

总结

<h2 style='color: inherit; line-height: inherit; padding: 0px; margin: 1.6em 0px; 
font-weight: bold; border-bottom: 2px solid rgb(127, 127, 127); 
font-size: 1.3em;'>
  <span style='font-size: inherit; line-height: inherit; 
  margin: 0px; display: inline-block; font-weight: normal; background: 
  rgb(127, 127, 127); color: rgb(255, 255, 255); padding: 3px 10px 1px;
  border-top-right-radius: 3px; border-top-left-radius: 3px; margin-right: 3px;'>
	总结
</span>
</h2>

顶部图片

<img style='width: auto;
    max-width: 100%;
    border-radius: 12px;
    display: block;
    margin: 20px auto;
    object-fit: contain;
    box-shadow: 2px 4px 7px #999;' src='//p3-juejin.byteimg.com/tos-cn-i-k3u1fbpfcp/2409c70f8dd246a49fddd9ffd648808b~tplv-k3u1fbpfcp-zoom-1.image'>

网格背景

<div style='background: -webkit-linear-gradient(top, transparent 19px, #ececec 20px), -webkit-linear-gradient(left, transparent 19px, #ececec 20px);
            background-size: 20px 20px;'>
            这里是文章所有的内容
            </div>

参考