diff --git a/src/App.js b/src/App.js
index 88096ef..b3d38d5 100755
--- a/src/App.js
+++ b/src/App.js
@@ -3,6 +3,9 @@ import { BrowserRouter as Router, Routes, Route } from 'react-router-dom';
 import { AuthProvider } from './context/AuthContext';
 import Login from './pages/Login';
 import ProductDetail from './pages/ProductDetail';
+import DevGuide from './pages/DevGuide';
+import Training from './pages/Training';
+import PrivateRoute from './components/PrivateRoute';
 import Navbar from './components/Navbar';
 import Home from './pages/Home';
 import './App.css';
@@ -16,6 +19,22 @@ function App() {
             <Route path="/login" element={<Login />} />
             
             <Route path="/product/:series/:sub/:idx" element={<ProductDetail />} />
+            <Route
+              path="/dev"
+              element={
+                <PrivateRoute>
+                  <DevGuide />
+                </PrivateRoute>
+              }
+            />
+            <Route
+              path="/training"
+              element={
+                <PrivateRoute>
+                  <Training />
+                </PrivateRoute>
+              }
+            />
             <Route path="/" element={<Home />} />
           </Routes>
       </Router>
diff --git a/src/components/Navbar.js b/src/components/Navbar.js
index bcfef4b..56b9c7e 100755
--- a/src/components/Navbar.js
+++ b/src/components/Navbar.js
@@ -231,23 +231,17 @@ const Navbar = () => {
             </div>
           </div>
 
-          {/* <div className="nav-item">
-            <span className="nav-label">解决方案</span>
-            <div className="dropdown">
-              <Link to="/" className="dropdown-item">解决方案A</Link>
-              <Link to="/" className="dropdown-item">解决方案B</Link>
-              <Link to="/" className="dropdown-item">解决方案C</Link>
+          {user && (
+            <div className="nav-item">
+              <span className="nav-label" onClick={() => navigate('/dev')}>开发指南</span>
             </div>
-          </div> */}
+          )}
 
-          {/* <div className="nav-item">
-            <span className="nav-label">行业</span>
-            <div className="dropdown">
-              <Link to="/" className="dropdown-item">民航</Link>
-              <Link to="/" className="dropdown-item">通航</Link>
-              <Link to="/" className="dropdown-item">研发制造</Link>
+          {user && (
+            <div className="nav-item">
+              <span className="nav-label" onClick={() => navigate('/training')}>培训资料</span>
             </div>
-          </div> */}
+          )}
         </div>
 
         <div className="navbar-right">
diff --git a/src/pages/DevGuide.js b/src/pages/DevGuide.js
new file mode 100644
index 0000000..ebebb9e
--- /dev/null
+++ b/src/pages/DevGuide.js
@@ -0,0 +1,12 @@
+import React from 'react';
+
+const DevGuide = () => {
+  return (
+    <div style={{ maxWidth: 1200, margin: '0 auto', padding: '20px' }}>
+      <h1 style={{ margin: 0, padding: '12px 0', color: '#111' }}>开发指南</h1>
+      <p style={{ color: '#333' }}>API、SDK、示例代码等开发资源的统一入口。</p>
+    </div>
+  );
+};
+
+export default DevGuide;
diff --git a/src/pages/Home.js b/src/pages/Home.js
index ba86b35..16cdce6 100755
--- a/src/pages/Home.js
+++ b/src/pages/Home.js
@@ -34,7 +34,7 @@ const Home = () => {
   useEffect(() => {
     const timer = setInterval(() => {
       setActive((prev) => (prev + 1) % slidesData.length);
-    }, 4000);
+    }, 5000);
     return () => clearInterval(timer);
   }, []);
 
diff --git a/src/pages/Login.js b/src/pages/Login.js
index b3a28cf..2b8a2ad 100755
--- a/src/pages/Login.js
+++ b/src/pages/Login.js
@@ -18,11 +18,11 @@ const Login = () => {
 
     const result = await login(username, password);
 
-    if (result.success) {
-      navigate('/');
-    } else {
-      setError(result.error);
-    }
+    if (result.success) {
+      navigate('/');
+    } else {
+      setError(result.error);
+    }
 
     setLoading(false);
   };
@@ -66,7 +66,7 @@ const Login = () => {
           </button>
         </form>
         <div className="login-hint">
-          <p>默认账号：admin / admin123</p>
+          <p>测试账号：admin / admin123</p>
         </div>
       </div>
     </div>
diff --git a/src/pages/ProductDetail.css b/src/pages/ProductDetail.css
index 8d35a44..e3b2823 100644
--- a/src/pages/ProductDetail.css
+++ b/src/pages/ProductDetail.css
@@ -50,9 +50,9 @@
 .pd-panel-body { background: #fff; padding: 12px 0; }
 .pd-panel.expanded { border: 1px dashed #bfbfbf; border-radius: 6px; }
 .pd-panel.expanded .pd-panel-header { padding: 12px 14px; border-bottom: none; }
-.image-row { display: flex; justify-content: center; align-items: center; gap: 40px; padding: 12px; }
+.image-row { display: flex; justify-content: center; align-items: center; gap: 40px; padding: 12px; background: #f5f5f5; }
 .image-row img { height: 420px; width: auto; object-fit: contain; display: block; }
-.size-carousel { position: relative; background: #fff; overflow: hidden; width: 100%; min-height: 420px; border-radius: 0; }
+.size-carousel { position: relative; background: #f5f5f5; overflow: hidden; width: 100%; min-height: 420px; border-radius: 0; }
 .size-slides { display: grid; grid-template-columns: 100%; }
 .size-slide { opacity: 0; transition: opacity 0.3s ease; display: none; }
 .size-slide.active { opacity: 1; display: block; }
diff --git a/src/pages/ProductDetail.js b/src/pages/ProductDetail.js
index edb7117..1ae5735 100644
--- a/src/pages/ProductDetail.js
+++ b/src/pages/ProductDetail.js
@@ -1,5 +1,6 @@
 import React, { useState, useEffect } from 'react';
 import { useParams, useLocation } from 'react-router-dom';
+import axios from 'axios';
 import './ProductDetail.css';
 
 const ProductDetail = () => {
@@ -14,7 +15,7 @@ const ProductDetail = () => {
   const [specsLoading, setSpecsLoading] = useState(false);
   const [imgOpen, setImgOpen] = useState(true);
   const [highlightsOpen, setHighlightsOpen] = useState(false);
-  const [compareOpen, setCompareOpen] = useState(true);
+  const [compareOpen, setCompareOpen] = useState(false);
   const [promoOpen, setPromoOpen] = useState(false);
   const [faqOpen, setFaqOpen] = useState(false);
   const [reviewOpen, setReviewOpen] = useState(false);
@@ -56,11 +57,11 @@ const ProductDetail = () => {
           if (data.data.length && typeof data.data[0]?.title === 'string' && Array.isArray(data.data[0]?.rows)) {
             setSections(data.data);
             setSpecs([]);
-            setExpanded(Object.fromEntries(data.data.map((_, i) => [i, true])));
+            setExpanded(Object.fromEntries(data.data.map((_, i) => [i, false])));
           } else {
             setSections([{ title: '参数', rows: data.data }]);
             setSpecs(data.data);
-            setExpanded({ 0: true });
+            setExpanded({ 0: false });
           }
         }
       } catch {}
@@ -75,7 +76,7 @@ const ProductDetail = () => {
     if (images.length <= 1) return;
     const timer = setInterval(() => {
       setActive((prev) => (prev + 1) % images.length);
-    }, 4000);
+    }, 5000);
     return () => clearInterval(timer);
   }, [images.length]);
 
@@ -95,7 +96,7 @@ const ProductDetail = () => {
   return (
     <div className="product-detail-page">
       <div className="container">
-        <div className="pd-title">{product.name}{product.desc ? ` | ${product.desc}` : ''}</div>
+        <div className="pd-title">{product.name}</div>
         <div className="section-narrow">
           <div className="pd-list">
             <button className="pd-list-item" onClick={() => setImgOpen(!imgOpen)}>
@@ -228,6 +229,35 @@ const DocsList = ({ series, sub }) => {
   const [loading, setLoading] = useState(false);
   const [error, setError] = useState('');
 
+  const handleDownload = async (d) => {
+    try {
+      const res = await axios.get(d.url, { responseType: 'blob' });
+      const blob = new Blob([res.data], { type: res.data.type || 'application/octet-stream' });
+      const url = URL.createObjectURL(blob);
+      const a = document.createElement('a');
+      a.href = url;
+      a.download = d.name || (String(d.url).split('/').pop() || '下载文件');
+      document.body.appendChild(a);
+      a.click();
+      a.remove();
+      URL.revokeObjectURL(url);
+    } catch (e) {
+      setError('下载失败或文件不存在');
+    }
+  };
+
+  const handleOpen = async (d) => {
+    try {
+      const res = await axios.get(d.url, { responseType: 'blob' });
+      const blob = new Blob([res.data], { type: 'application/pdf' });
+      const url = URL.createObjectURL(blob);
+      window.open(url, '_blank');
+      setTimeout(() => URL.revokeObjectURL(url), 60000);
+    } catch (e) {
+      window.open(d.url, '_blank');
+    }
+  };
+
   React.useEffect(() => {
     const fetchDocs = async () => {
       try {
@@ -259,11 +289,23 @@ const DocsList = ({ series, sub }) => {
     <ul className="docs-list">
       {docs.map((d) => (
         <li key={d.url} className="docs-item">
-          <a href={`${d.url}`} target="_blank" rel="noreferrer" className="docs-link">
-            {d.name}
-          </a>
+          {String(d.url || '').toLowerCase().endsWith('.pdf') ? (
+            <a
+              href={`${d.url}`}
+              target="_blank"
+              rel="noreferrer"
+              className="docs-link"
+              onClick={(e) => { e.preventDefault(); handleOpen(d); }}
+            >
+              {d.name}
+            </a>
+          ) : (
+            <a href={`${d.url}`} target="_blank" rel="noreferrer" className="docs-link">
+              {d.name}
+            </a>
+          )}
           <span className="docs-size">{(d.size / 1024 / 1024).toFixed(2)}MB</span>
-          <a href={`${d.url}`} download className="docs-download">下载</a>
+          <button type="button" className="docs-download" onClick={() => handleDownload(d)}>下载</button>
         </li>
       ))}
     </ul>
diff --git a/src/pages/Training.js b/src/pages/Training.js
new file mode 100644
index 0000000..c7c99e6
--- /dev/null
+++ b/src/pages/Training.js
@@ -0,0 +1,12 @@
+import React from 'react';
+
+const Training = () => {
+  return (
+    <div style={{ maxWidth: 1200, margin: '0 auto', padding: '20px' }}>
+      <h1 style={{ margin: 0, padding: '12px 0', color: '#111' }}>培训资料</h1>
+      <p style={{ color: '#333' }}>课程、教材、视频等培训资源的统一入口。</p>
+    </div>
+  );
+};
+
+export default Training;