diff --git a/docs/index.html b/docs/index.html
index 9ceed40f8..d3c40f3e6 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -141,8 +141,7 @@
             <!-- iphone height = 160.7mm -->
             <div class="media-block">
                 <div style="height: 8.17%;"></div>
-                <img class="device-on-hover" style="height: 66.83%;" src="assets/hero/cover_render.png"
-                    alt="Cover">
+                <img class="device-on-hover" style="height: 66.83%;" src="assets/hero/cover_render.png" alt="Cover">
                 <div class="text-button" style="color: var(--md-accent-fg-color);">
                     <span>纸质书<br>（即将发布）</span>
                 </div>
@@ -208,7 +207,7 @@
                         <h3 style="margin-left: 0.5em;">动画图解</h3>
                     </div>
                     <p style="margin: 0;">内容清晰易懂，学习曲线平滑</p>
-                    <p class="intro-quote">"A picture is worth a thousand words."</br>“一图胜千言”</p>
+                    <p class="intro-quote">"A picture is worth a thousand words."<br>“一图胜千言”</p>
                 </div>
             </div>
             <img class="intro-image" src="index.assets/animation.gif" alt="Animation example">
@@ -226,7 +225,7 @@
                         <h3 style="margin-left: 0.5em;">一键运行</h3>
                     </div>
                     <p style="margin: 0;">十余种编程语言，代码可视化运行</p>
-                    <p class="intro-quote">"Talk is cheap. Show me the code."</br>“少吹牛，看代码”</p>
+                    <p class="intro-quote">"Talk is cheap. Show me the code."<br>“少吹牛，看代码”</p>
                 </div>
             </div>
         </div>
@@ -242,7 +241,7 @@
                         <h3 style="margin-left: 0.5em;">互助学习</h3>
                     </div>
                     <p style="margin: 0;">欢迎讨论与提问，读者间携手共进</p>
-                    <p class="intro-quote">"Learning by teaching."</br>“教学相长”</p>
+                    <p class="intro-quote">"Learning by teaching."<br>“教学相长”</p>
                 </div>
             </div>
             <img class="intro-image" src="index.assets/comment.gif" alt="Comments example">
@@ -273,7 +272,8 @@
             <div class="profile-div">
                 <div class="profile-cell">
                     <a href="https://github.com/codingonion">
-                        <img class="profile-img" src="assets/avatar/avatar_codingonion.jpg" alt="Reviewer: codingonion" />
+                        <img class="profile-img" src="assets/avatar/avatar_codingonion.jpg"
+                            alt="Reviewer: codingonion" />
                         <br><b>codingonion</b>
                         <br><sub>Zig, Rust</sub>
                     </a>
@@ -315,7 +315,8 @@
                 </div>
                 <div class="profile-cell">
                     <a href="https://github.com/night-cruise">
-                        <img class="profile-img" src="assets/avatar/avatar_night-cruise.jpg" alt="Reviewer: night-cruise" />
+                        <img class="profile-img" src="assets/avatar/avatar_night-cruise.jpg"
+                            alt="Reviewer: night-cruise" />
                         <br><b>night-cruise</b>
                         <br><sub>Rust</sub>
                     </a>