fix https://github.com/b3log/solo/issues/12611

Medium/css/base.css

@@ -19,7 +19,7 @@
  * skin style
  *
  * @author <a href="http://vanessa.b3log.org">Liyuan Li</a>
- * @version 0.1.0.0, Jan 29, 2018
+ * @version 0.1.0.1, Jan 2, 2019
 */
 /* start common */
 html {
@@ -334,6 +334,25 @@ blockquote {
     box-shadow: inset 0 -1px 0 #bbb
 }
 
+.content-reset__task,
+.content-reset .task-list-item {
+    list-style: none;
+    margin-left: -1em;
+}
+
+.content-reset img {
+    cursor: zoom-in;
+}
+
+.content-reset img.emoji {
+    cursor: auto;
+    max-width: 18px;
+}
+
+.content-reset ins > iframe {
+    border: 0;
+}
+
 .fn-flex {
     display: flex
 }