style: 深色模式改用微信官方配色 #191919，导航栏与页面背景统一

src/app.scss

@@ -14,7 +14,7 @@
 
 .theme-dark {
   min-height: 100vh;
-  background-color: var(--bg-page, #000000);
+  background-color: var(--bg-page, #191919);
   box-sizing: border-box;
 }
 
@@ -35,18 +35,18 @@
 }
 
 .theme-dark {
-  --bg-page: #000000;
+  --bg-page: #191919;
   --line-card: 3px dashed #5b8cff;
   --line-star: #5b8cff;
-  --text-primary: #e8e8e8;
-  --text-secondary: #a8a8a8;
-  --text-muted: #6f6f6f;
+  --text-primary: #e6e6e6;
+  --text-secondary: #999999;
+  --text-muted: #737373;
   --accent-pink: #ff7eb3;
   --accent-blue: #5cadff;
   --btn-gradient: linear-gradient(135deg, #ff7eb3 0%, #7a5cff 100%);
   --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.3);
-  --bg-input: #141414;
-  --bg-card: #1a1a1a;
+  --bg-input: #232323;
+  --bg-card: #232323;
 }
 
 /* page 基础字体 */

src/custom-tab-bar/index.scss

@@ -16,7 +16,7 @@
 
 /* 自定义组件样式隔离：两套主题配色在组件内自包含，不依赖全局 app.wxss */
 .custom-tab-bar.theme-dark {
-  background: #000000;
+  background: #191919;
   border-top-color: #5b8cff;
 }
 
@@ -49,7 +49,7 @@
 }
 
 .custom-tab-bar.theme-dark .tab-label {
-  color: #a8a8a8;
+  color: #999999;
 }
 
 .tab-item.active .tab-label {

src/hooks/useStatusBar.ts

@@ -21,7 +21,7 @@ export function useStatusBar(resolvedTheme: 'light' | 'dark', options: UseStatus
   const apply = useCallback(() => {
     const isDarkText = mode === 'dark' || (mode === 'auto' && resolvedTheme === 'light')
     const frontColor = isDarkText ? '#000000' : '#ffffff'
-    const bgColor = isDarkText ? '#ffffff' : '#000000'
+    const bgColor = isDarkText ? '#ffffff' : '#191919'
 
     Taro.setNavigationBarColor({ frontColor, backgroundColor: bgColor })
     // 同步页面背景色，确保自定义导航区（状态栏下方、胶囊按钮区域）跟随主题，

src/theme.json

@@ -12,15 +12,15 @@
     "tabBarBorderStyle": "black"
   },
   "dark": {
-    "navBgColor": "#000000",
+    "navBgColor": "#191919",
     "navTxtStyle": "white",
-    "bgColor": "#000000",
+    "bgColor": "#191919",
     "bgTxtStyle": "light",
-    "bgColorTop": "#000000",
-    "bgColorBottom": "#000000",
-    "tabBarColor": "#a8a8a8",
+    "bgColorTop": "#191919",
+    "bgColorBottom": "#191919",
+    "tabBarColor": "#999999",
     "tabBarSelectedColor": "#ff7eb3",
-    "tabBarBgColor": "#000000",
+    "tabBarBgColor": "#191919",
     "tabBarBorderStyle": "white"
   }
 }

src/utils/themeBackground.ts

@@ -2,7 +2,7 @@ import Taro from '@tarojs/taro'
 
 /** 实际生效主题对应的窗口/页面背景色 */
 export function themePageColor(theme: 'light' | 'dark'): string {
-  return theme === 'dark' ? '#000000' : '#ffffff'
+  return theme === 'dark' ? '#191919' : '#ffffff'
 }
 
 /**