重构动物认领页面和导航菜单，统一使用SVG图标并优化交互体验

website/css/travel.css

@@ -1,28 +1,6 @@
 /* 旅行结伴页面样式 */
 
-.page-header.travel-header {
-    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), 
-                url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="100" height="100" viewBox="0 0 100 100"><rect width="100" height="100" fill="%232ecc71"/><path d="M20,30 Q40,10 60,30 T100,30 L100,100 L20,100 Z" fill="%2327ae60" opacity="0.7"/></svg>');
-    background-size: cover;
-    background-position: center;
-}
-
-.travel-header {
-    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
-    background-size: cover;
-    background-position: center;
-    position: relative;
-}
-
-.travel-header::before {
-    content: '';
-    position: absolute;
-    top: 0;
-    left: 0;
-    right: 0;
-    bottom: 0;
-    background: rgba(0, 0, 0, 0.4);
-}
+/* 旅行结伴页面现在使用统一的hero-section样式 */
 
 .travel-plan-card {
     transition: transform 0.3s ease, box-shadow 0.3s ease;