fix: set gut testing price to ¥1,314

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

web/product-intro/gut-testing.html

@@ -317,7 +317,7 @@ body{padding-bottom:70px}
 <div class="sticky-bar">
   <div>
     <div class="label">肠道菌群基因检测</div>
-    <div><span class="price">¥0.01</span><span class="orig">测试价 ¥1,314</span></div>
+    <div><span class="price">¥1,314</span><span class="orig">¥1,999</span></div>
   </div>
   <button class="sticky-btn" onclick="var f=document.getElementById('orderForm');f.style.visibility='visible';f.style.opacity='1'">立即购买</button>
 </div>
@@ -378,7 +378,7 @@ function doJsapiPay(orderNo, openid) {
     body: JSON.stringify({
       orderNo: orderNo,
       description: '肠道菌群基因检测',
-      amount: 1, // 测试价0.01元
+      amount: 131400,
       openid: openid
     })
   })
@@ -438,7 +438,7 @@ function fallbackNativePay(orderNo) {
     body: JSON.stringify({
       orderNo: orderNo,
       description: '肠道菌群基因检测',
-      amount: 1,
+      amount: 131400,
       contactName: c.name || '',
       contactPhone: c.phone || '',
       contactAddress: c.address || ''
@@ -472,7 +472,7 @@ function tryH5Pay(orderNo) {
     body: JSON.stringify({
       orderNo: orderNo,
       description: '肠道菌群基因检测',
-      amount: 1,
+      amount: 131400,
     })
   })
   .then(function(r) { return r.json(); })