第二次提交

lib/features/main_container/presentation/main_wrapper.dart

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+import 'dart:ui';
+
+import 'package:flutter/material.dart';
+import 'package:go_router/go_router.dart';
+import 'package:google_nav_bar/google_nav_bar.dart';
+
+class MainWrapper extends StatelessWidget {
+  final StatefulNavigationShell navigationShell;
+
+  const MainWrapper({super.key, required this.navigationShell});
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      extendBody: true, // 必须开启，让内容流过导航栏下方
+      body: navigationShell,
+      bottomNavigationBar: Container(
+        margin: const EdgeInsets.fromLTRB(20, 0, 20, 32), // 稍微调高底部间距
+        decoration: BoxDecoration(
+          borderRadius: BorderRadius.circular(32),
+          boxShadow: [
+            BoxShadow(
+              color: Colors.black.withOpacity(0.12), // 强化阴影，增加悬浮感
+              blurRadius: 30,
+              offset: const Offset(0, 10),
+            ),
+          ],
+        ),
+        child: ClipRRect(
+          borderRadius: BorderRadius.circular(32),
+          child: BackdropFilter(
+            filter: ImageFilter.blur(sigmaX: 16, sigmaY: 16), // 增加模糊半径
+            child: Container(
+              decoration: BoxDecoration(
+                // 降低白色透明度到 0.4，减少“灰蒙蒙”的白雾感，让背景颜色更亮地透出来
+                color: Colors.white.withOpacity(0.4),
+                borderRadius: BorderRadius.circular(32),
+                border: Border.all(
+                  // 使用极细的深色半透明边框勾勒轮廓
+                  color: Colors.black.withOpacity(0.08),
+                  width: 0.5,
+                ),
+              ),
+              child: SafeArea(
+                top: false,
+                child: Padding(
+                  padding: const EdgeInsets.symmetric(
+                    horizontal: 10,
+                    vertical: 8,
+                  ),
+                  child: GNav(
+                    rippleColor: Colors.transparent,
+                    hoverColor: Colors.transparent,
+                    gap: 10,
+                    // 【关键修改】选中状态：纯黑背景 + 纯白图标/文字
+                    activeColor: Colors.white,
+                    tabBackgroundColor: Colors.black,
+                    // 未选中状态：深黑色
+                    color: Colors.black87,
+                    iconSize: 24,
+                    padding: const EdgeInsets.symmetric(
+                      horizontal: 18,
+                      vertical: 10,
+                    ),
+                    duration: const Duration(milliseconds: 300),
+                    selectedIndex: navigationShell.currentIndex,
+                    onTabChange: (index) {
+                      navigationShell.goBranch(index);
+                    },
+                    tabs: const [
+                      GButton(icon: Icons.grid_view_rounded, text: '状态'),
+                      GButton(icon: Icons.auto_awesome_rounded, text: 'AI'),
+                      GButton(icon: Icons.person_rounded, text: '我的'),
+                    ],
+                  ),
+                ),
+              ),
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+}