开店第三页银行卡号：只允许数字，最多 19 位；校验仍为 16–19 位。

门店详情 / 开店页：去掉顶栏返回与标题空白，内容上顶，顶部约 12px，与「门店管理」一致。
开店第一页底部：在「下一步」左侧加了「返回」（回门店列表）；第 2、3 步仍是「上一步」。

apps/h5-partner/src/pages/StoreCreatePage.tsx

@@ -2,8 +2,6 @@ import { useEffect, useMemo, useRef, useState } from 'react';
 
 import { useNavigate, useSearchParams } from 'react-router-dom';
 
-import PageHeader from '@dukang/shared-ui/PageHeader';
-
 import ChinaRegionPicker from '../components/ChinaRegionPicker';
 
 import OssUploadField from '../components/OssUploadField';
@@ -576,11 +574,7 @@ export default function StoreCreatePage() {
 
   return (
 
-    <div className="partner-page-sticky">
-
-      <PageHeader title="录入新门店" onBack={() => navigate('/stores')} />
-
-
+    <div className="partner-page-sticky partner-home--flush-top">
 
       <nav className="partner-stepper">
 
@@ -980,7 +974,15 @@ export default function StoreCreatePage() {
 
               <label>银行卡号 *</label>
 
-              <input className="partner-field-input partner-field-input--block" placeholder="请输入16-19位银行卡号" value={form.bankAccountNo} onChange={(e) => patchForm({ bankAccountNo: e.target.value })} />
+              <input
+                className="partner-field-input partner-field-input--block"
+                inputMode="numeric"
+                autoComplete="cc-number"
+                maxLength={19}
+                placeholder="请输入16-19位银行卡号"
+                value={form.bankAccountNo}
+                onChange={(e) => patchForm({ bankAccountNo: e.target.value.replace(/\D/g, '').slice(0, 19) })}
+              />
 
             </div>
 
@@ -1116,7 +1118,11 @@ export default function StoreCreatePage() {
 
       <footer className="partner-sticky-footer">
 
-        {step > 1 && (
+        {step === 1 ? (
+
+          <button type="button" className="partner-btn-outline" onClick={() => navigate('/stores')} disabled={nextDisabled}>返回</button>
+
+        ) : (
 
           <button type="button" className="partner-btn-outline" onClick={() => goStep(step - 1)} disabled={nextDisabled}>上一步</button>