routes:[
            {
                path:'/',
                name:'home',
                component:Home,
                // redirect:'/index',
                children:[
                    {
                        path:'/',
                        name:'index',
                        component:Index,
                    }, {
                        path:'product/:id',
                        name:'product',
                        component:() => import('@/pages/product'),
                    }, {
                        path:'detail/:id',
                        name:'detail',
                        component:() => import('@/pages/detail'),
                    }
                ]
            },

老师，我平时都是这样写的，子路由的path为/就是根路径，它就覆盖上面的home了。