diff --git a/templates/admin_login.html b/templates/admin_login.html
index 23a247e..c71f56c 100644
--- a/templates/admin_login.html
+++ b/templates/admin_login.html
@@ -184,7 +184,7 @@
                 <label for="captcha">验证码</label>
                 <div style="display: flex; gap: 10px; align-items: center;">
                     <input type="text" id="captcha" name="captcha" placeholder="请输入验证码" style="flex: 1;">
-                    <img id="captchaImage" src="" alt="验证码" style="height: 36px; border: 1px solid #ddd; border-radius: 4px; cursor: pointer;" onclick="refreshCaptcha()" title="点击刷新">
+                    <img id="captchaImage" src="" alt="验证码" style="height: 50px; border: 1px solid #ddd; border-radius: 4px; cursor: pointer;" onclick="refreshCaptcha()" title="点击刷新">
                     <button type="button" onclick="refreshCaptcha()" style="padding: 8px 15px; background: #f0f0f0; border: 1px solid #ddd; border-radius: 4px; cursor: pointer;">刷新</button>
                 </div>
             </div>
diff --git a/templates/login.html b/templates/login.html
index 3d8e38f..9ba5308 100644
--- a/templates/login.html
+++ b/templates/login.html
@@ -185,7 +185,7 @@
                     <label for="captcha">验证码</label>
                     <div class="captcha-row">
                         <input type="text" id="captcha" name="captcha" placeholder="请输入验证码">
-                        <img id="captchaImage" src="" alt="验证码" style="height: 36px; border: 1px solid #ddd; border-radius: 4px; cursor: pointer;" onclick="refreshCaptcha()" title="点击刷新">
+                        <img id="captchaImage" src="" alt="验证码" style="height: 50px; border: 1px solid #ddd; border-radius: 4px; cursor: pointer;" onclick="refreshCaptcha()" title="点击刷新">
                         <button type="button" class="captcha-refresh" onclick="refreshCaptcha()">🔄</button>
                     </div>
                 </div>
@@ -211,7 +211,7 @@
                         <label>验证码</label>
                         <div class="captcha-row">
                             <input type="text" id="emailResetCaptcha" placeholder="请输入验证码" required>
-                            <img id="emailResetCaptchaImage" src="" alt="验证码" style="height: 36px; border: 1px solid #ddd; border-radius: 4px; cursor: pointer;" onclick="refreshEmailResetCaptcha()" title="点击刷新">
+                            <img id="emailResetCaptchaImage" src="" alt="验证码" style="height: 50px; border: 1px solid #ddd; border-radius: 4px; cursor: pointer;" onclick="refreshEmailResetCaptcha()" title="点击刷新">
                             <button type="button" class="captcha-refresh" onclick="refreshEmailResetCaptcha()">🔄</button>
                         </div>
                     </div>
@@ -242,7 +242,7 @@
                         <label>验证码</label>
                         <div class="captcha-row">
                             <input type="text" id="resendCaptcha" placeholder="请输入验证码" required>
-                            <img id="resendCaptchaImage" src="" alt="验证码" style="height: 36px; border: 1px solid #ddd; border-radius: 4px; cursor: pointer;" onclick="refreshResendCaptcha()" title="点击刷新">
+                            <img id="resendCaptchaImage" src="" alt="验证码" style="height: 50px; border: 1px solid #ddd; border-radius: 4px; cursor: pointer;" onclick="refreshResendCaptcha()" title="点击刷新">
                             <button type="button" class="captcha-refresh" onclick="refreshResendCaptcha()">🔄</button>
                         </div>
                     </div>
diff --git a/templates/register.html b/templates/register.html
index bc4a4df..c986a48 100644
--- a/templates/register.html
+++ b/templates/register.html
@@ -181,7 +181,7 @@
                 <label for="captcha">验证码</label>
                 <div style="display: flex; gap: 10px; align-items: center;">
                     <input type="text" id="captcha" placeholder="请输入验证码" required style="flex: 1;">
-                    <img id="captchaImage" src="" alt="验证码" style="height: 40px; border: 1px solid #ddd; border-radius: 4px; cursor: pointer;" onclick="refreshCaptcha()" title="点击刷新">
+                    <img id="captchaImage" src="" alt="验证码" style="height: 50px; border: 1px solid #ddd; border-radius: 4px; cursor: pointer;" onclick="refreshCaptcha()" title="点击刷新">
                     <button type="button" onclick="refreshCaptcha()" style="padding: 8px 15px; background: #f0f0f0; border: 1px solid #ddd; border-radius: 4px; cursor: pointer;">刷新</button>
                 </div>
             </div>