+ add training page (add admonition shortcode)

+ Finish translation
+ clean unused asset

themes/tse/assets/css/theme.scss

@@ -18,12 +18,16 @@ body {
   vertical-align: middle;  
 }
 
+#site-page-head {
+  height: 0%;
+}
+
 #site-head.withCenteredImage{
   /* can't be used together with video */
   background: var(--section-light-bg-color) no-repeat center center;
 }
 
-#site-head, #site-head.withCenteredImage {
+#site-head, #site-head.withCenteredImage, #site-page-head  {
   // position: relative;
   display: table;
   width: 100%;
@@ -131,7 +135,6 @@ body {
     }
   }
 
-
   #site-head-content {
     
     // position: absolute;