main{
    user-select: none;
}
main > p{
    width: 240px;
    height: 0px;
    margin: 0px auto 100px;
    font-size:60px;/*字体大小*/
    font-weight:bold;/*字体粗细*/
    line-height:77px;/*字体垂直居中*/
    text-align:center;/*字体水平居中*/
    /* background-color: lightskyblue; */
}
main > p:hover{
    color: rgb(141, 141, 141);
}
main > ul:last-of-type{
    /*display: flex;/*弹性盒模型*/
    position: relative;/*相对定位*/
    width: 840px;
    height: 575px;
    /*justify-content: space-between;/* 主轴两侧对齐 */
    /*align-content: space-between;/* 两侧有相同间距 */
    /*flex-wrap: wrap;/*弹性换行*/
    padding: 10px;
    margin: auto;
    background-color: rgb(255, 243, 250);
}
main > ul:last-of-type > li > section{
    display: flex;/*弹性盒模型*/
}
main > ul:last-of-type > li:nth-child(1){
    float: left;/*左浮动*/
}
main > ul:last-of-type > li:nth-child(2){
    float: right;/*右浮动*/
}
main > ul:last-of-type > li:nth-child(3){
    float: right;/*右浮动*/
}
main > ul:last-of-type > li:nth-child(4){
    float: left;/*左浮动*/
}
main > ul:last-of-type > li:nth-child(5){
    float: left;/*左浮动*/
}
main > ul:last-of-type > li:nth-child(6){
    float: left;/*左浮动*/
}
main > ul:last-of-type > li:nth-child(7){
    float: left;/*左浮动*/
}
main > ul:last-of-type > li > section{
    /*float: left;/*左浮动*/
    position: relative;/*相对定位*/
    top: 0px;
    left: 0px; 
    width: 265px;
    height: 240px;
    margin: 10px;
    background-color: greenyellow;
}
/* main > ul:last-of-type > li:first-of-type{
    order:1;
}
main > ul:last-of-type > li:nth-child(2){
    order:2;
}
main > ul:last-of-type > li:nth-child(3){
    order:3;
}
main > ul:last-of-type > li:nth-child(4){
    order:4;
}
main > ul:last-of-type > li:nth-child(5){
    order:5;
}
main > ul:last-of-type > li:nth-child(6){
    order:6;
}
main > ul:last-of-type > li:last-of-type{
    order:7;
} */
main > ul:last-of-type > li:hover > section{
    top: -3px;
    left: -3px;
    cursor: pointer;/*小手*/
    box-shadow:6px 6px 6px 1px rgb(194, 194, 194);/*阴影*/
}
main > ul:last-of-type > li:first-of-type > section{
    width: 835px;
    height: 500px;
}
main > ul:last-of-type > li > section > section{
    display: none;
    width: 60px;
    height: 240px;
    background-color: rgb(255, 255, 255);
}
main > ul:last-of-type > li > section > section > p{
    width: 50px;
    font-size: 50px;/*字体大小*/
    color: blueviolet;
    /* background-color: brown; */
    margin: 15px auto 0;
}
main > ul:last-of-type > li:first-of-type > section > section{
    display: block;
    width: 282px;
    height: 500px;
    background-color: rgb(255, 255, 255);
    transition: 0.1s linear;
}
main > ul:last-of-type > li:focus-within > section{
    width: 835px;
    height: 500px;
}