我应该如何将此对象从 .PSD 转换为 HTML/CSS?

How should I convert this object from .PSD to HTML/CSS?

如果可能的话,我应该用纯 CSS 制作这个对象,还是将其用作 div 的背景图像?

它超出了主要内容区域,所以我不确定如何实现它。我想我应该对 div?

使用绝对定位

CSS 仅 解决方案使用 border:

.block {
  background-color: #f3f3f3;
  color: #909090;
  font-family: Arial, sans-serif;
  margin: 0 auto;
  padding: 20px 20px 10px;
  width: 300px;
}
.block h2 {
  background-color: #a9c4c6;
  color: white;
  font-family: Roboto Slab, serif;
  font-weight: normal;
  position: relative;
  left: -29px;
  margin: 0;
  position: relative;
  text-indent: 29px;
  text-transform: uppercase;
}
.block h2:before {
  content: "";
  display: block;
  position: absolute;
  top: -8px;
  left: 0;
  border-width: 4px 5px;
  border-color: #84a0a2;
  border-style: solid;
  border-top-color: transparent;
  border-left-color: transparent;
  width: 0;
  height: 0;
}
<link href="https://fonts.googleapis.com/css?family=Roboto+Slab" rel="stylesheet">
<section class="block">
  <h2>Furniture</h2>
  <p>Should I make this object from pure CSS if it is possible or us it as a background image for a div?</p>

  <p>It goes outside of main content area so I am not sure how to implement it. I guess I should use absolute positioning for the div?</p>
</section>

我们必须使用 css 边框,我们得到相同的....

要了解更多信息,您必须像这篇文章一样阅读如何使用 css 形状 https://css-tricks.com/examples/ShapesOfCSS/

.main{
padding:20px;
}
.test {
  font-size: 15px;
  background: #ccc;
  padding:10px
  
  
}
h2
{
 position: relative;
 width: 50%;
 font-size: 1.5em;
 font-weight: bold;
 padding: 6px 20px 6px 70px;
 color: #555;
 background-color: #AECACC;
 text-shadow: 0px 1px 2px #bbb;
 -webkit-box-shadow: 0px 2px 4px #888;
 -moz-box-shadow: 0px 2px 4px #888;
 box-shadow: 0px 2px 4px #888;
  left:-20px;
}

h2:after
{
 content: ' ';
 position: absolute;
  /*EDIT border WIDTH as you want fold tringle with css */
 border-bottom: 10px solid #8BA8AA; 
    border-left: 10px solid transparent;
    height: 0;
    width: 0;
    left: 0px;
  /*EDIT TOP as border width */
 top: -10px;
  
}
<div class="main">
<div class="test">
<h2>HEADING HERE</h2>
</div>

</div>