diff --git a/src/vendor/tianai-captcha/captcha/concat/concat.js b/src/vendor/tianai-captcha/captcha/concat/concat.js
index f825980..87aed35 100644
--- a/src/vendor/tianai-captcha/captcha/concat/concat.js
+++ b/src/vendor/tianai-captcha/captcha/concat/concat.js
@@ -9,16 +9,14 @@ import {
 
 const TYPE = "CONCAT";
 
-function getTemplate(styleConfig) {
+function getTemplate() {
   return `
   <div class="captcha captcha-slider captcha-concat">
   <div class="slider-tip">
   <span class="captcha-slider-move-track-font" >拖动滑块完成拼图</span>
   </div>
   <div class="content">
-  <div class="captcha-slider-concat-img-div">
-  <img class="captcha-slider-concat-slider-img" src="" alt/>
-  </div>
+  <div class="captcha-slider-concat-img-div"></div>
   <div class="captcha-slider-concat-bg-img"></div>
    <div class="captcha-tips"></div>
   </div>
@@ -46,7 +44,7 @@ class Concat extends CommonCaptcha {
   init(captchaData, endCallback, loadSuccessCallback) {
     // 重载样式
     this.destroy();
-    this.boxEl.append(getTemplate(this.styleConfig));
+    this.boxEl.append(getTemplate());
     this.el = this.boxEl.find(".captcha");
     this.loadStyle();
     // 按钮绑定事件
diff --git a/src/vendor/tianai-captcha/captcha/concat/concat.less b/src/vendor/tianai-captcha/captcha/concat/concat.less
index 796e8d6..1b9fbce 100644
--- a/src/vendor/tianai-captcha/captcha/concat/concat.less
+++ b/src/vendor/tianai-captcha/captcha/concat/concat.less
@@ -5,6 +5,19 @@
     transform: translate(0px, 0px);
     z-index: 1;
     width: 100%;
+    &::after {
+      content: "";
+      position: absolute;
+      left: 0;
+      right: 0;
+      bottom: 0;
+      height: 1px;
+      background: rgba(255, 255, 255, 0.92);
+      box-shadow:
+        0 0 6px 3px rgb(255 255 255 / 60%),
+        0 1px 4px rgb(0 0 0 / 90%);
+      pointer-events: none;
+    }
   }
   .captcha-slider-concat-bg-img {
     width: 100%;