build

overrides/main.html

@@ -2,9 +2,9 @@
 
 {% block announce %}
 {% if config.theme.language == 'zh' %}
-    {% set announcements = "纸质书将于近期发布，敬请关注！" %}
+    {% set announcements = '纸质书已发布，详情请见<a href="/chapter_paperbook/">纸质书介绍</a>' %}
 {% elif config.theme.language == 'en' %}
-    {% set announcements = "The paper book (Chinese edition) will be published soon. Stay tuned!" %}
+    {% set announcements = 'The paper book (Chinese edition) published. Please visit <a href="/chapter_paperbook/">this link</a> for more details.' %}
 {% endif %}
 <div class="banner-svg">
     <svg xmlns="http://www.w3.org/2000/svg"

overrides/stylesheets/extra.css

@@ -522,3 +522,17 @@ a:hover .text-button span {
     flex-basis: 25%;
   }
 }
+
+.video-container {
+  position: relative;
+  padding-bottom: 56.25%; /* 16:9 */
+  height: 0;
+}
+
+.video-container iframe {
+  position: absolute;
+  top: 0;
+  left: 0;
+  width: 100%;
+  height: 100%;
+}