导航栏替换正式品牌标识

src/components/Layout/Navbar.tsx

@@ -10,7 +10,7 @@ export default function Navbar() {
     <header className="site-header">
       <div className="container nav-inner">
         <Link to="/" className="brand" onClick={() => setOpen(false)}>
-          <span className="brand-mark">阿</span>
+          <img className="brand-mark" src="/images/logo.png" alt="阿美巴咨询" />
           <span className="brand-text">
             <strong>阿美巴咨询</strong>
             <small>企业进化陪跑</small>

src/components/Layout/layout.css

@@ -14,12 +14,10 @@
 }
 .brand { display: flex; align-items: center; gap: 10px; color: var(--primary); }
 .brand-mark {
-  width: 36px; height: 36px;
-  background: var(--primary);
-  color: #fff;
-  border-radius: 8px;
-  display: grid; place-items: center;
-  font-weight: 900;
+  width: 44px;
+  height: 44px;
+  object-fit: contain;
+  flex: 0 0 auto;
 }
 .brand-text strong { display: block; font-size: 15px; line-height: 1; }
 .brand-text small { font-size: 11px; color: var(--text-muted); letter-spacing: 0.06em; }