body {
    margin: 0;
    padding: 0;
    background-image: url("../images/004.jpeg");
}

.home {
    position: fixed; /*绝对定位，固定在页面上*/
}
.nav {
    width: 100%;
    height: 15%;
    position: fixed;
    top: 90%;
    background-color: white;
    display: flex;
    border-bottom: 1px solid gray;
    z-index: 3;
}

.left,.right {
    width: 10%;
    height: 100%;
    text-align: center;
}

.end {
    width: 16%;
    height: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: auto;
}

.menu {
    width: 16%;
    height: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: auto;
    border-right: 1px solid gray;
}

a {
    color: gray;
    font-size: 18px;
    text-decoration: none;
}

.nav a:hover {
    height: 100%;
    width: 80%;
    text-align: center;
    line-height: 47px;
    background-color: cornflowerblue;
    color: white;
    border-radius: 7px;
    transition: 1s; /**/
}
/*.box1{
    position:absolute;
    animation:barrage 4s linear 0s;
    margin-top: 60px;
    visibility: hidden;
}
.box2{
    position:absolute;
    margin-top: 100px;
    animation:barrage 4s linear 0s;
    visibility: hidden;
}
@keyframes barrage{
    from{
        left:100%;
        transform:translateX(0);
    }
    to{
        left:0;
        visibility: visible;
        transform:translateX(-100%);
    }
}
#size{
    font-size: x-large;
}

 */
.whole{
    margin: 30px;
    display: grid;
    grid-row-gap: 10px;
    grid-column-gap: 10px;
    grid-template-columns:600px 600px 600px;
    grid-template-rows: 400px 400px 400px;


}
.content001 {

    text-align: center;
    padding: 30px;
}
.content002 {

    text-align: center;
    padding: 30px;
}
.content003 {

    text-align: center;
    padding: 30px;
}
.content004 {

    text-align: center;
    padding: 30px;
}
.content005 {

    text-align: center;

    padding-top: 200px;
}
.content006 {

    text-align: center;
    padding: 30px;
}
.content007 {

    text-align: center;
    padding: 30px;
}
.content008 {

    text-align: center;
    padding: 30px;
}
.link{
    width: 400px;
    height: 300px;
    display: inline;
}