diff --git a/txw-mhzc-web/src/pages/index/views/home2/index.vue b/txw-mhzc-web/src/pages/index/views/home2/index.vue
index 8c5fd73..4acb7b0 100644
--- a/txw-mhzc-web/src/pages/index/views/home2/index.vue
+++ b/txw-mhzc-web/src/pages/index/views/home2/index.vue
@@ -67,7 +67,7 @@
                 <div class="card-title">碳数字身份证</div>
               </div>
               <div class="card-body">
-                <div class="card-btn" @click="handleIframeNavigate(buttonLinks['碳证中心'])">开始办证</div>
+                <div class="card-btn" @click="handleIframeNavigate(certStoragePath)">开始办证</div>
                 <div class="card-btn" @click="handleIframeNavigate(buttonLinks['碳证查询'])">碳证查询</div>
                 <div class="card-btn" @click="handleIframeNavigate(buttonLinks['碳证核验'])">碳证核验</div>
                 <div class="card-btn" @click="handleNavigate(buttonLinks['场景推介'])">场景推介</div>
@@ -719,8 +719,8 @@ export default {
         window.location.href = '/view/mhzc/login';
         return;
       }
-      // 已登录：iframe 跳转到碳证中心
-      const url = `${this.buttonLinkHost}${this.buttonLinks['碳证中心']}`;
+      // 已登录：iframe 跳转到碳证中心存证页面（/carbon-index?page=%2Fweb%2Fcarbon-report-cert）
+      const url = `${this.buttonLinkHost}${this.certStoragePath}`;
       this.$emit('gotoIfreamPage', url);
     },
 
@@ -902,6 +902,15 @@ export default {
     },
   },
   computed: {
+    /**
+     * 碳证中心存证页面 iframe 路径。
+     * 用于首页"开始办证"卡片按钮与底部"申请服务"按钮。
+     * 通过 page 参数指定 /carbon-index 内嵌的子页面：/web/carbon-report-cert。
+     */
+    certStoragePath() {
+      const base = this.buttonLinks['碳证中心'] || '/carbon-index';
+      return `${base}?page=%2Fweb%2Fcarbon-report-cert`;
+    },
     currentNewsList() {
       const type = this.newsTabs[this.activeTab]?.type;
       const list = this.newsListByType[type] || [];