feat: popover for all articles (#306)

diff --git a/README.md b/README.md
index 7226394..1ef3a37 100755
--- a/README.md
+++ b/README.md
@@ -46,7 +46,7 @@
 Content
 ```
 
-If you want to display the event in the bottom right popover, you can configure the parameter `endTime`. The parameters are as follows.
+If you want to display the summary in the popover in the lower right corner, you need to configure a parameter `endTime`. The parameters are as follows.
 
 |Parameter|Description|Required|Default|
 |----|----|----|----|
diff --git a/content/blog/2021-07-12-500-contributors-mark/index.md b/content/blog/2021-07-12-500-contributors-mark/index.md
index afd1308..78175de 100644
--- a/content/blog/2021-07-12-500-contributors-mark/index.md
+++ b/content/blog/2021-07-12-500-contributors-mark/index.md
@@ -5,7 +5,7 @@
 description: "SkyWalking has over 500 contributors based on GitHub repository statistics. This is a remarkable achievement for the whole diverse community."
 startTime: 2021-07-01T00:00:00Z
 endTime: 2021-08-01T10:00:00Z
-img: /images/500-mark.png
+poster: /images/500-mark.png
 ---
 
 ![](500-mark.png)
diff --git a/content/downloads/_index.md b/content/downloads/_index.md
index 7e02026c3..3af98c6 100755
--- a/content/downloads/_index.md
+++ b/content/downloads/_index.md
@@ -28,7 +28,7 @@
 
 It is essential that you verify the integrity of the downloaded files using the PGP or SHA signatures. The PGP signatures can be verified using GPG or PGP. Please download the KEYS as well as the asc signature files for relevant distribution. It is recommended to get these files from the main distribution directory and not from the mirrors.
 
-```bash
+```
 gpg -i KEYS
 
 or
@@ -42,7 +42,7 @@
 
 To verify the binaries/sources you can download the relevant asc files for it from main distribution directory and follow the below guide.
 
-```bash
+```
 gpg --verify apache-skywalking-apm-********.asc apache-skywalking-apm-*********
 
 or
diff --git a/themes/docsy/assets/scss/_main-container.scss b/themes/docsy/assets/scss/_main-container.scss
index 7da275e..8391527 100644
--- a/themes/docsy/assets/scss/_main-container.scss
+++ b/themes/docsy/assets/scss/_main-container.scss
@@ -35,4 +35,7 @@
 
         padding-bottom: 2rem;
     }
+    .td-content table thead tr th {
+        border-bottom: none;
+    }
 }
diff --git a/themes/docsy/layouts/partials/event-popup.html b/themes/docsy/layouts/partials/event-popup.html
index 6e902dd..7ab7b81 100644
--- a/themes/docsy/layouts/partials/event-popup.html
+++ b/themes/docsy/layouts/partials/event-popup.html
@@ -1,6 +1,6 @@
 {{ $scratchTotal := newScratch }}
 
-{{ range first 50 (where .Site.Pages "Section" "events")  }}
+{{ range where .Site.Pages "Section" "!=" "" }}
 {{ if .Params.endTime }}
 {{ if (time .Params.endTime).After now }}
 {{ $scratchTotal.Add "total" 1 }}
@@ -23,7 +23,7 @@
         </div>
 
         <div class="content-box">
-            {{ range first 50 (where .Site.Pages "Section" "events") }}
+            {{ range where .Site.Pages "Section" "!=" "" }}
             {{ if .Params.endTime }}
             {{ if (time .Params.endTime).After now }}