update sections, work a bit on style

aircox_cms/static/aircox_cms/styles.css

@@ -20,9 +20,13 @@ body {
     }
 
 
+.section {
+    vertical-align: top;
+}
+
 main .section {
-    width: calc(50% - 1em);
-    float: left;
+    width: calc(50% - 2em);
+    display: inline-block;
     padding: 0.5em;
 }
 
@@ -39,3 +43,8 @@ main .section {
     }
 
 
+.post_item {
+    display: block;
+}
+
+