h1 {
    color: #0077bb; /* 将标题改为蓝色 */
}
body{
font-size:16px;
}
.triBOX .triHiden{
    display:none;
    position:absolute;
    width: 350px;
    box-shadow: 0 0 3px black;
    background:white;
}
.triBOX:hover .triHiden{
    display:block;
    z-index:10;
}