/* base css */
@import url(/.shared-cocolog/themes/common/base-weblog.css);

/* portal css */
@import url(/.shared-cocolog/nifty_managed/themes/common/base.css);


/* theme css */
@import url(//theme.cocolog-nifty.com/themes/material/theme-cork/screen.css);
@import url(/.shared-cocolog/nifty_managed/themes/material/theme-cork/screen.css);


/* user css */
* {
　margin: 0;
　padding0: ;
　font-style: normal;
　font-weight: normal;
　font-size : 100%;
}

.layout-two-column-right #container{
   width: 1000px;
}
.layout-two-column-right #alpha{
   width: 200px;
}
.layout-two-column-right #beta{
   width: 800px;
}
<div style="width:500px;background-color:#f5f5f5;padding:40px;-webkit-border-radius:20px;border-radius:20px;box-shadow: 5px 5px 5px rgba(0,0,0,0.4);"><span style="float:left;font-size:72pt;margin: -30px 0 -10px -10px;height:30px;color:#d3d3d3;">"</span>
<div>[引用はじめ]</div>
<div style="margin-bottom:20px;">
　ここにテキストを入力します。
</div>
[引用終わり]
<span style="float:right;margin-top:-20px;font-size:72pt;height:30px;color:#d5d5d5;">"</span></div>