main{
    user-select: none;
}
main > ul:nth-child(2){
    width: 1303.4px;
    height: 146px;
    /* background-color: darkorange; */
    margin: auto;
}
main > ul:nth-child(2) > li{
    width: 1299.4px;
    height: 40px;
    /* background-color: rgb(255, 169, 169); */
}
main > ul:nth-child(2) > li:nth-child(1){
    height: 100px;
    border: 2px solid rgb(168, 168, 168);/*实心边框*/
    font-size:50px;/*字体大小*/
    line-height:90px;/*文字垂直居中*/
    text-align:center;/*字体水平居中*/
    letter-spacing: 30px;
}
main > ul:nth-child(2) > li:nth-child(2){
    border-left: 2px solid rgb(168, 168, 168);/*实心边框*/
    border-right: 2px solid rgb(168, 168, 168);/*实心边框*/
    border-bottom: 2px solid rgb(168, 168, 168);/*实心边框*/
}
/* main > ul:nth-child(2) > li:nth-child(3){
    height: 80px;
    border: 2px solid rgb(168, 168, 168);/*实心边框*
} */
main > ul:nth-child(2) > li > ul > li{
    float: left;/*左浮动*/
    height: 40px;
    padding: 0 13.3px;
    line-height:38px;/*文字垂直居中*/
}
main > ul:nth-child(2) > li:nth-child(2) > ul > li:hover{
    cursor: pointer;/*小手*/
    background-color: deepskyblue;
}
main > ul:nth-child(2) > li > ul > li:nth-child(1){
    font-size:18px;/*字体大小*/
    line-height:37px;/*文字垂直居中*/
}
main > ul:nth-child(2) > li:nth-child(3) > ul > li:nth-child(13){
    margin-left: 62px;
}
main > ul:nth-child(3){
    display: flex;/*弹性盒模型*/
    width: 1299.4px;
    /* height: 4770px; */
    /* background-color: dodgerblue; */
    margin: 30px auto 0;
    padding-bottom: 11px;
    border: 2px solid rgb(168, 168, 168);/*实心边框*/
    flex-wrap: wrap;/*弹性换行*/
}
main > ul:nth-child(3) > li{
    /*float: left;/*左浮动*/
    position: relative;/*相对定位*/
    top: 5px;
    left: 5px;
    width: 239.8px;
    height: 192px;
    margin: 9px;
    background-color: rgb(250, 250, 250);
    transition: 0.1s linear;
}
main > ul:nth-child(3) > li:hover{
    position: relative;/*相对定位*/
    top: 0px;
    left: 0px;
    box-shadow:7px 7px 10px -3px rgb(155, 155, 155);/*阴影*/
}
/* main > ul:nth-child(3) > li > a{
    /* display: inline-block;/*变元素*
    width: 239.8px;
    height: 220px; *
    background-color: rgb(250, 250, 250);
    /* margin: 10px; *
} */
main > ul:nth-child(3) > li > a > p{
    height: 30px;
    background-color: rgb(0, 81, 255);
    color: rgb(191, 207, 98);
    line-height:30px;/*字体垂直居中*/
    text-align:center;/*字体水平居中*/
}
main > ul:nth-child(3) > li > a:hover > p{
    color: rgb(255, 255, 255);
}
main > ul:nth-child(3) > li > a > p > span{
    margin-left: 50px;
}