diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 83d41a2..f7552c1 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -3,12 +3,9 @@
   <component name="ChangeListManager">
     <list default="true" id="5022b617-d045-4c00-9e44-77877d4e36e1" name="Default Changelist" comment="">
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/css/common.css" beforeDir="false" afterPath="$PROJECT_DIR$/css/common.css" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/css/index.css" beforeDir="false" afterPath="$PROJECT_DIR$/css/index.css" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/images/index.jpg" beforeDir="false" afterPath="$PROJECT_DIR$/images/index.jpg" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/images/index1.jpg" beforeDir="false" afterPath="$PROJECT_DIR$/images/index1.jpg" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/images/index2.jpg" beforeDir="false" afterPath="$PROJECT_DIR$/images/index2.jpg" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/images/index3.jpg" beforeDir="false" afterPath="$PROJECT_DIR$/images/index3.jpg" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/images/index2.jpg" beforeDir="false" />
+      <change beforePath="$PROJECT_DIR$/images/index3.jpg" beforeDir="false" />
     </list>
     <option name="EXCLUDED_CONVERTED_TO_IGNORED" value="true" />
     <option name="SHOW_DIALOG" value="false" />
@@ -85,7 +82,7 @@
       <workItem from="1574039614897" duration="3076000" />
       <workItem from="1574818735019" duration="15573000" />
       <workItem from="1574905325139" duration="9641000" />
-      <workItem from="1574990136846" duration="8949000" />
+      <workItem from="1574990136846" duration="10488000" />
     </task>
     <task id="LOCAL-00001" summary="官网1.0">
       <created>1574907211978</created>
@@ -122,7 +119,14 @@
       <option name="project" value="LOCAL" />
       <updated>1574924922788</updated>
     </task>
-    <option name="localTasksCounter" value="6" />
+    <task id="LOCAL-00006" summary="修改首页图片">
+      <created>1575006296806</created>
+      <option name="number" value="00006" />
+      <option name="presentableId" value="LOCAL-00006" />
+      <option name="project" value="LOCAL" />
+      <updated>1575006296807</updated>
+    </task>
+    <option name="localTasksCounter" value="7" />
     <servers />
   </component>
   <component name="TypeScriptGeneratedFilesManager">
@@ -145,6 +149,7 @@
     <MESSAGE value="官网1.0" />
     <MESSAGE value="更改图片高清度" />
     <MESSAGE value="添加&#10;ico图标" />
-    <option name="LAST_COMMIT_MESSAGE" value="添加&#10;ico图标" />
+    <MESSAGE value="修改首页图片" />
+    <option name="LAST_COMMIT_MESSAGE" value="修改首页图片" />
   </component>
 </project>
\ No newline at end of file
diff --git a/css/index.css b/css/index.css
index 4afad90..14508c8 100644
--- a/css/index.css
+++ b/css/index.css
@@ -205,7 +205,7 @@ dl {
 #step3 {
     position: relative;
     padding-bottom: 150px;
-    background: url('../images/index2.jpg') no-repeat center/cover;
+    background: url('../images/index2-1.jpg') no-repeat center/cover;
     box-sizing: border-box;
 }
 #step4 {
@@ -215,7 +215,7 @@ dl {
 #step5 {
     position: relative;
     padding-bottom: 150px;
-    background: url('../images/index3.jpg') no-repeat center/cover;
+    background: url('../images/index3-1.jpg') no-repeat center/cover;
     box-sizing: border-box;
 }
 #step6 {
diff --git a/images/index2-1.jpg b/images/index2-1.jpg
new file mode 100644
index 0000000..348da10
Binary files /dev/null and b/images/index2-1.jpg differ
diff --git a/images/index2.jpg b/images/index2.jpg
deleted file mode 100644
index 8afca7c..0000000
Binary files a/images/index2.jpg and /dev/null differ
diff --git a/images/index3-1.jpg b/images/index3-1.jpg
new file mode 100644
index 0000000..0372e2f
Binary files /dev/null and b/images/index3-1.jpg differ
diff --git a/images/index3.jpg b/images/index3.jpg
deleted file mode 100644
index 25e1948..0000000
Binary files a/images/index3.jpg and /dev/null differ