diff --git a/app/account_service.py b/app/account_service.py
index 09439d5..dc854a3 100644
--- a/app/account_service.py
+++ b/app/account_service.py
@@ -112,6 +112,13 @@ def reset():
         # POST请求用于提交修改后信息
         old_password = escape(request.form['old-password'])
         new_password = escape(request.form['new-password'])
+
+        re_new_password = escape(request.form['re-new-password'])  # 确认新密码
+        if re_new_password != new_password: #验证新密码两次输入是否相同
+            return '新密码不匹配，请重新输入'
+        if len(new_password) < 4: #验证新密码长度，原则参照注册模块
+            return '密码过于简单。(密码长度至少4位)'
+
         flag = change_password(username, old_password, new_password) # flag表示是否修改成功
         if flag:
             session['logged_in'] = False
diff --git a/app/static/css/login_service.css b/app/static/css/login_service.css
new file mode 100644
index 0000000..50277e6
--- /dev/null
+++ b/app/static/css/login_service.css
@@ -0,0 +1,107 @@
+/*样式应用于login、signup、reset三个页面*/
+
+.container {
+    background-color: #FFFFFF;
+    width: 400px;
+    height: 500px;
+    margin: 7em auto;
+    border-radius: 1.5em;
+    box-shadow: 0px 11px 35px 2px rgba(0, 0, 0, 0.14);
+}
+
+/*增加一个类reset-heading*/
+.signin-heading, .reset-heading {
+    padding-top: 5px;
+    color: #8C55AA;
+    font-family: 'Ubuntu', sans-serif;
+    font-weight: bold;
+    font-size: 23px;
+    text-align: center;
+}
+
+/*增加2个类.old-password和.new-password*/
+.username, .email, .password, .re-password, .old-password, .new-password,.re-new-password {
+    width: 76%;
+    color: rgb(38, 50, 56);
+    font-weight: 700;
+    font-size: 14px;
+    letter-spacing: 1px;
+    background: rgba(136, 126, 126, 0.04);
+    padding: 10px 20px;
+    border: none;
+    border-radius: 20px;
+    outline: none;
+    box-sizing: border-box;
+    border: 2px solid rgba(124, 16, 97, 0.02);
+    margin-bottom: 50px;
+    margin-left: 46px;
+    text-align: center;
+    margin-bottom: 27px;
+    font-family: 'Ubuntu', sans-serif;
+}
+
+.btn {
+    width: 50%;
+    border: none;
+    border-radius: 20px;
+    box-sizing: border-box;
+    border: 2px solid #8C55AA;
+    margin-bottom: 50px;
+    margin-left: 90px;
+    padding: 10px 20px;
+
+}
+
+.btn:hover {
+
+    background: #8C55AA;
+    transition: .5s;
+    cursor: pointer;
+    color: #fff;
+}
+
+
+.signup {
+    display: flex;
+    justify-content: center;
+    align-items: center;
+}
+
+ul {
+    position: absolute;
+    display: flex;
+    left: 65%;
+
+}
+
+li {
+    padding: 10px;
+    margin: 10px;
+}
+
+a {
+    text-decoration: none;
+    list-style: none;
+    font-weight: bold;
+    font-family: 'ink free';
+
+}
+
+.main_menu a {
+    color: #fff;
+    font-size: 300px;
+}
+
+li :hover {
+    color: #8C55AA;
+    transition: .5s;
+}
+
+h1 {
+    font-family: 'ink free';
+
+}
+
+.main_menu h1 {
+    color: #fff;
+}
\ No newline at end of file
diff --git a/app/templates/login.html b/app/templates/login.html
index e3e19d1..a347e22 100644
--- a/app/templates/login.html
+++ b/app/templates/login.html
@@ -5,115 +5,7 @@ You're logged in already!
 
 {% else %}
 <meta charset="utf-8" name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=0.5, maximum-scale=3.0, user-scalable=yes" />
-<style>
-  
-  .container{
-      background-color: #FFFFFF;
-      width: 400px;
-      height: 500px;
-      margin: 7em auto;
-      border-radius: 1.5em;
-      box-shadow: 0px 11px 35px 2px rgba(0, 0, 0, 0.14);
-      
-  }
-
-  .signin-heading{
-      padding-top: 5px;
-      color: #8C55AA;
-      font-family: 'Ubuntu', sans-serif;
-      font-weight: bold;
-      font-size: 23px;
-      text-align: center;
-  }
-
-  .username, .email, .password, .re-password{
-      width: 76%;
-      color: rgb(38, 50, 56);
-      font-weight: 700;
-      font-size: 14px;
-      letter-spacing: 1px;
-      background: rgba(136, 126, 126, 0.04);
-      padding: 10px 20px;
-      border: none;
-      border-radius: 20px;
-      outline: none;
-      box-sizing: border-box;
-      border: 2px solid rgba(124, 16, 97, 0.02);
-      margin-bottom: 50px;
-      margin-left: 46px;
-      text-align: center;
-      margin-bottom: 27px;
-      font-family: 'Ubuntu', sans-serif;
-  }
-
-  .btn{
-      width: 50%;
-      border: none;
-      border-radius: 20px;
-      box-sizing: border-box;
-      border: 2px solid #8C55AA;
-      margin-bottom: 50px;
-      margin-left: 90px;
-      padding: 10px 20px;
-      
-  }
-
-  .btn:hover{
-
-      background: #8C55AA;
-      transition: .5s;
-      cursor: pointer;
-      color: #fff;
-  }
-
-
-  .signup{
-      display: flex;
-      justify-content: center;
-      align-items: center;
-  }
-
-  ul{
-      position: absolute;
-      display: flex;
-      left: 65%;
-      
-  }
-
-  li{
-      padding: 10px;
-      margin: 10px;  
-  }
-
-  a{
-      text-decoration: none;
-      list-style: none;
-      font-weight: bold;
-      font-family: 'ink free';
-      
-  }
-
-  .main_menu a{
-      color: #fff;
-      font-size: 300;
-  }
-
-  li :hover{
-      color: #8C55AA;
-      transition: .5s;
-  }
-
-  h1{
-      font-family: 'ink free';
-
-  }
-
-  .main_menu h1{
-      color: #fff;
-  }
-
-
-</style>
+<link rel="stylesheet" href="static/css/login_service.css">
 
 <div class="container">
 
diff --git a/app/templates/reset.html b/app/templates/reset.html
index b26de3c..902d046 100644
--- a/app/templates/reset.html
+++ b/app/templates/reset.html
@@ -1,14 +1,22 @@
-<html>
-    <body>
-    <form action="/reset" method='POST'>
-        旧密码:
-        <input type="password" name="old-password" />
-        <br/>
-        新密码:
-        <input type="password" name="new-password" />
-        <br/>
-        <input type="submit" name="submit" value="提交" />
-        <input type="button" name="submit" value="放弃修改" onclick="window.location.href='/{{ username }}'"/>
-    </form>
-    </body>
-</html>
\ No newline at end of file
+{% block body %}
+    <meta charset="utf-8" name="viewport"
+          content="width=device-width, initial-scale=1.0, minimum-scale=0.5, maximum-scale=3.0, user-scalable=yes"/>
+    <link rel="stylesheet" href="static/css/login_service.css">
+
+    <div class="container">
+
+        <section class="reset-heading">
+            <h1>Reset Password</h1>
+        </section>
+
+        <form action="/reset" method="POST">
+            <input type="password" placeholder="原密码" class="old-password" name="old-password" required>
+            <input type="password" placeholder="新密码" class="new-password" name="new-password" required>
+            <input type="password" placeholder="确认新密码" class="re-new-password" name="re-new-password" required>
+            <input type="submit" name="submit" class="btn" value="提交"/>
+            <input type="button" name="submit" class="btn" value="放弃修改"
+                   onclick="window.location.href='/{{ username }}'"/>
+        </form>
+
+    </div>
+{% endblock %}
\ No newline at end of file
diff --git a/app/templates/signup.html b/app/templates/signup.html
index bbc653a..f7bd69f 100644
--- a/app/templates/signup.html
+++ b/app/templates/signup.html
@@ -5,117 +5,9 @@ You're logged in already! <a href="/logout">Logout</a>.
 
 {% else %}
 <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=0.5, maximum-scale=3.0, user-scalable=yes" />
+<link rel="stylesheet" href="static/css/login_service.css">
 <p>{{ get_flashed_messages()[0] | safe }}</p>
 
-<style>
-
-.container{
-        background-color: #FFFFFF;
-        width: 400px;
-        height: 500px;
-        margin: 7em auto;
-        border-radius: 1.5em;
-        box-shadow: 0px 11px 35px 2px rgba(0, 0, 0, 0.14);
-    
-}
-
-.signin-heading{
-        padding-top: 5px;
-        color: #8C55AA;
-        font-family: 'Ubuntu', sans-serif;
-        font-weight: bold;
-        font-size: 23px;
-        text-align: center;
-}
-
-.username,.password, .re-password{
-    width: 76%;
-    color: rgb(38, 50, 56);
-    font-weight: 700;
-    font-size: 14px;
-    letter-spacing: 1px;
-    background: rgba(136, 126, 126, 0.04);
-    padding: 10px 20px;
-    border: none;
-    border-radius: 20px;
-    outline: none;
-    box-sizing: border-box;
-    border: 2px solid rgba(124, 16, 97, 0.02);
-    margin-bottom: 50px;
-    margin-left: 46px;
-    text-align: center;
-    margin-bottom: 27px;
-    font-family: 'Ubuntu', sans-serif;
-}
-
-.btn{
-    width: 50%;
-    border: none;
-    border-radius: 20px;
-    box-sizing: border-box;
-    border: 2px solid #8C55AA;
-    margin-bottom: 50px;
-    margin-left: 90px;
-    padding: 10px 20px;
-   
-}
-
-.btn:hover{
-
-    background: #8C55AA;
-    transition: .5s;
-    cursor: pointer;
-    color: #fff;
-}
-
-
-.signup{
-    display: flex;
-    justify-content: center;
-    align-items: center;
-}
-
-ul{
-    position: absolute;
-    display: flex;
-    left: 65%;
-    
-}
-
-li{
-    padding: 10px;
-    margin: 10px;  
-}
-
- a{
-    text-decoration: none;
-    list-style: none;
-    font-weight: bold;
-    font-family: 'ink free';
-    
-}
-
-.main_menu a{
-    color: #fff;
-    font-size: 300;
-}
-
-li :hover{
-    color: #8C55AA;
-    transition: .5s;
-}
-
-h1{
-    font-family: 'ink free';
-
-}
-
-.main_menu h1{
-    color: #fff;
-}
-
-
-</style>
 
 <div class="container">