diff --git a/Makefile b/Makefile
index 0e0fd0b..5298488 100644
--- a/Makefile
+++ b/Makefile
@@ -80,8 +80,10 @@ html: $(SRC)
 	--number-sections \
 	-o html \
 	--mathml \
+	--highlight-style tango \
 	--template chunked.html \
 	--variable title="技术图书排版" \
+	--variable description-meta="《技术图书排版》，开源免费电子书。" \
 	--lua-filter diagram-generator.lua \
 	--lua-filter=docx-figure-number.lua \
 	--include-after after.html \
diff --git a/after.html b/after.html
index 1b52418..c2f642d 100644
--- a/after.html
+++ b/after.html
@@ -1,4 +1,3 @@
-<p><br/></p>
 <hr/>
 <div class="w-full">
     版权所有 &copy; 杜金房 2014-2023，仅供在线阅读，谢绝一切形式转载。
diff --git a/chunked.html b/chunked.html
index f4308ed..8ad2698 100644
--- a/chunked.html
+++ b/chunked.html
@@ -22,6 +22,10 @@
     span.navlink { flex: 1; }
     span.navlink-label { display: inline-block; min-width: 4em; }
     $styles.html()$
+    body { font-family: -apple-system, BlinkMacSystemFont, Helvetica Neue, PingFang SC, Microsoft YaHei, Source Han Sans SC, Noto Sans CJK SC ,WenQuanYi Micro Hei, sans-serif;}
+    code { color: navy }
+    a { color: #ef1aa4; text-decoration: none; }
+    a:visited { color: #ef1aa4; text-decoration: none; }
   </style>
 $for(css)$
   <link rel="stylesheet" href="$css$" />
@@ -93,6 +97,23 @@ <h2 id="$idprefix$toc-title">$toc-title$</h2>
 </nav>
 $endif$
 $body$
+
+<hr>
+<nav id="sitenavbottom">
+  <div class="sitenav">
+    <span class="navlink">
+    $if(previous.url)$
+    <span class="navlink-label">上一节:</span> <a href="$previous.url$" accesskey="p" rel="previous">$previous.title$</a>
+    $endif$
+    </span>
+    <span class="navlink">
+    $if(next.url)$
+    <span class="navlink-label">下一节:</span> <a href="$next.url$" accesskey="n" rel="next">$next.title$</a>
+    $endif$
+    </span>
+  </div>
+</nav>
+
 $for(include-after)$
 $include-after$
 $endfor$
diff --git a/meta.md b/meta.md
index a67e7d4..290f3a5 100644
--- a/meta.md
+++ b/meta.md
@@ -5,6 +5,7 @@ author: 杜金房
 title-meta: 技术图书排版
 title-prefix: 技术图书排版
 author-meta: 杜金房
+description-meta: 《技术图书排版》，开源免费电子书。
 publisher: 版权所有\qquad 侵权必究
 verbatim-in-note: true
 keywords: "技术图书排版"