增加缩小个关闭按钮

css/global.css

@@ -163,4 +163,10 @@
   background: url(wave2.png) repeat-x;
   width:300%;
   top:0;
-}
+}
+.colorblack{
+  color:#212529;
+}
+.colorblack:hover{
+  color:#333;
+};

software-install.html

@@ -28,7 +28,7 @@
                 </div>
               </div>
             </div>
-            <div class="dropdown float-right">
+            <div class="dropdown float-left mr-2">
               <div class="dropdown-toggle" id="dropdownMenuButton" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                 <i class="fas fa-download"></i><span class="badge badge-pill badge-info ml-2">2</span>
               </div>
@@ -47,6 +47,8 @@
                 </div>
               </div>
             </div>
+            <div class="float-left mt-1 mr-3"><a href="#" class="colorblack"><i class="fas fa-minus"></i></a></div>
+            <div class="float-right mt-1"><a href="#" class="colorblack"><i class="fas fa-times"></i></a></div>
           </div>
           <h5>纵横启动器</h5>
         </div>