进行了一些小修复

assets/css/frontend/pages/submit-editor.css

@@ -0,0 +1,44 @@
+/* Content shown inside the front-submit TinyMCE iframe. */
+.tinymce-hide {
+  position: relative;
+  margin: 18px 0;
+  padding: 38px 14px 14px;
+  border: 1px dashed rgba(240, 68, 148, 0.35);
+  border-radius: 6px;
+  background: rgba(240, 68, 148, 0.04);
+}
+
+.tinymce-hide > .hide-before,
+.tinymce-hide > .hide-after {
+  margin: 0;
+  color: #f04494;
+  font-family: Consolas, Monaco, monospace;
+  font-size: 12px;
+  line-height: 1.5;
+}
+
+.tinymce-hide > .hide-before {
+  position: absolute;
+  top: 10px;
+  left: 14px;
+}
+
+.tinymce-hide > .hide-after {
+  margin-top: 8px;
+}
+
+.tinymce-hide > [contenteditable="true"] {
+  min-height: 38px;
+  padding: 10px;
+  border-radius: 4px;
+  background: rgba(255, 255, 255, 0.75);
+  outline: 0;
+}
+
+.tinymce-hide > [contenteditable="true"] > :first-child {
+  margin-top: 0;
+}
+
+.tinymce-hide > [contenteditable="true"] > :last-child {
+  margin-bottom: 0;
+}