diff --git a/themes/dot/layouts/index.html b/themes/dot/layouts/index.html
index 02a868407b140e18dbe5c2f3da408113e7268742..e80522198ff28cc2b20f0e051b0b3e77b98a1710 100644
--- a/themes/dot/layouts/index.html
+++ b/themes/dot/layouts/index.html
@@ -1,55 +1,55 @@
-{{ define "main" }}
-
-  {{ "<!-- topics -->" | safeHTML }}
-  <section class="section">
-    <div class="container">
-      <div class="row justify-content-center">
-        <div class="col-12 text-center">
-          <h2 class="section-title">{{ "专辑" | safeHTML }}</h2>
-        </div>
-        {{ "<!-- topic-item -->" | safeHTML }}
-        {{ range (where .Site.Pages "Type" "docs") }}
-        <div class="col-lg-4 col-sm-6 mb-4">
-          <a 
-          {{ if .Params.link }}
-          href="{{ .Params.link }}" target="_blank"
-          {{ else }}
-          href="{{ .Permalink }}" 
-          {{ end }}
-          class="px-4 py-5 bg-white shadow text-center d-block match-height" style="padding: 3em 1em!important">
-            {{ with .Params.icon}}<i class="{{.}} icon text-primary d-block mb-4"></i>{{end}}
-            <h3 class="mb-3 mt-0">{{ .Title }}</h3>
-            {{with .Params.description}}<p class="mb-0">{{. | markdownify}}</p>{{end}}
-          </a>
-        </div>
-        {{ end }}
-      </div>
-    </div>
-  </section>
-  {{ "<!-- /topics -->" | safeHTML }}
-
-  {{ if .Site.Params.cta.enable }}
-  {{ with .Site.Params.cta }}
-  {{ "<!-- call to action -->" | safeHTML }}
-  <section>
-    <div class="container">
-      <div class="row">
-        <div class="col-12">
-          <div class="section px-3 bg-white shadow text-center">
-          <h2 class="mb-4">{{ .title | markdownify }}</h2>
-          <p class="mb-4">{{ .content | markdownify }}</p>
-          {{ if .button.enable }}
-          {{ with .button }}
-          <a href="{{ .link | relLangURL }}" class="btn btn-primary">{{ .label }}</a>
-          {{ end }}
-          {{ end }}
-          </div>
-        </div>
-      </div>
-    </div>
-  </section>
-  {{ "<!-- /call to action -->" | safeHTML }}
-  {{ end }}
-  {{ end }}
-
-{{ end }}
\ No newline at end of file
+{{ define "main" }}
+
+  {{ "<!-- topics -->" | safeHTML }}
+  <section class="section">
+    <div class="container">
+      <div class="row">
+        <div class="col-12 text-center">
+          <h2 class="section-title">{{ "专辑" | safeHTML }}</h2>
+        </div>
+        {{ "<!-- topic-item -->" | safeHTML }}
+        {{ range (where .Site.Pages "Type" "docs") }}
+        <div class="col-lg-4 col-sm-6 mb-4">
+          <a 
+          {{ if .Params.link }}
+          href="{{ .Params.link }}" target="_blank"
+          {{ else }}
+          href="{{ .Permalink }}" 
+          {{ end }}
+          class="px-4 py-5 bg-white shadow text-center d-block match-height" style="padding: 3em 1em!important">
+            {{ with .Params.icon}}<i class="{{.}} icon text-primary d-block mb-4"></i>{{end}}
+            <h3 class="mb-3 mt-0">{{ .Title }}</h3>
+            {{with .Params.description}}<p class="mb-0">{{. | markdownify}}</p>{{end}}
+          </a>
+        </div>
+        {{ end }}
+      </div>
+    </div>
+  </section>
+  {{ "<!-- /topics -->" | safeHTML }}
+
+  {{ if .Site.Params.cta.enable }}
+  {{ with .Site.Params.cta }}
+  {{ "<!-- call to action -->" | safeHTML }}
+  <section>
+    <div class="container">
+      <div class="row">
+        <div class="col-12">
+          <div class="section px-3 bg-white shadow text-center">
+          <h2 class="mb-4">{{ .title | markdownify }}</h2>
+          <p class="mb-4">{{ .content | markdownify }}</p>
+          {{ if .button.enable }}
+          {{ with .button }}
+          <a href="{{ .link | relLangURL }}" class="btn btn-primary">{{ .label }}</a>
+          {{ end }}
+          {{ end }}
+          </div>
+        </div>
+      </div>
+    </div>
+  </section>
+  {{ "<!-- /call to action -->" | safeHTML }}
+  {{ end }}
+  {{ end }}
+
+{{ end }}