补充：优化富文本图片圆角样式

src/static/ckeditor/contents.css

@@ -1,20 +1,21 @@
 body{font-family:sans-serif,Arial,Verdana,"Trebuchet MS","Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";font-size:12px;color:#333;background-color:#fff;margin:20px}
-.cke_editable{font-size:12px;line-height:1.5;word-wrap:break-word}
 blockquote{font-style:italic;font-family:Georgia,Times,"Times New Roman",serif;padding:2px 0;border-style:solid;border-color:#ccc;border-width:0}
-.cke_contents_ltr blockquote{padding-left:20px;padding-right:8px;border-left-width:5px}
-.cke_contents_rtl blockquote{padding-left:8px;padding-right:20px;border-right-width:5px}
 a{color:#0782C1}
-ol,ul,dl{*margin-right:0px;padding:0 40px}
+ol,ul,dl{padding:0 40px}
 h1,h2,h3,h4,h5,h6{font-weight:normal;line-height:1.5}
 hr{border:0px;border-top:1px solid #ccc}
-img.right{border:1px solid #ccc;float:right;margin-left:15px;padding:5px}
-img.left{border:1px solid #ccc;float:left;margin-right:15px;padding:5px}
 pre{white-space:pre-wrap;word-wrap:break-word;-moz-tab-size:4;tab-size:4}
-.marker{background-color:Yellow}
 span[lang]{font-style:italic}
 figure{text-align:center;outline:solid 1px #ccc;background:rgba(0,0,0,0.05);padding:10px;margin:10px 20px;display:inline-block}
 figure > figcaption{text-align:center;display:block}
+img{border-radius:6px}
 a > img{padding:1px;margin:1px;border:none;outline:1px solid #0782C1}
+img.right{border:1px solid #ccc;float:right;margin-left:15px;padding:5px}
+img.left{border:1px solid #ccc;float:left;margin-right:15px;padding:5px}
+.marker{background-color:Yellow}
+.cke_editable{font-size:12px;line-height:1.5;word-wrap:break-word}
+.cke_contents_ltr blockquote{padding-left:20px;padding-right:8px;border-left-width:5px}
+.cke_contents_rtl blockquote{padding-left:8px;padding-right:20px;border-right-width:5px}
 .code-featured{border:5px solid red}
 .math-featured{padding:20px;box-shadow:0 0 2px rgba(200,0,0,1);background-color:rgba(255,0,0,0.05);margin:10px}
 .image-clean{border:0;background:none;padding:0}