window.addEventListener('load',function(){
    const items = document.getElementsByClassName("APPLICATIONSCENARIO")
    console.log(items)
    for(let i=0;i<items.length;i++){
        console.log(items[i])
        items[i].onmouseover = function(){
            console.log('移入')
            this.querySelector(".shell").style.display = "block"
            // this.style.display = "block"
        }
        items[i].onmouseout = function(){
            console.log('移出')
            this.querySelector(".shell").style.display = "none"
            // this.style.display = "none"
        }
    }
})