.change li:nth-child(1) a{
    color: var(--allColor);
}

.change li:nth-child(1) a:after {
    content: '';
    position: absolute;
    width: 100%;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--allColor);
}

.sec1 {
    width: 100%;
    position: relative;
    overflow: hidden;
    padding-bottom: 22vw;
}

.nav_tit{
    color: #222;
}

.bj_img {
    width: 100%;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: 0;
    z-index: -1;
}

.sec-des {
    width: 100%;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.sec-des div{
    width: 46%;
    color: #777;
    line-height: 1.8;
}

.cnumlist {
    width: 100%;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: space-between;
}

.cnumitem {
    flex: 1;
    background: #fff;
}

.cnumitem {
    flex: 1;
    background: #fff;
    min-height: 160px;
    padding: 10px 2vw;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

p.e_text {
    font-weight: bold;
    color: #222;
    line-height: 1;
}

.scrollNumber {
    display: flex;
    margin-top: 10px;
    line-height: 1;
    font-weight: bold;
    color: var(--allColor);
}

.sp_box {
    width: 100%;
    overflow: hidden;
    cursor: pointer;
    position: relative;
}

.sp_box .sp_img {
    width: 100%;
}

.sp_box .sp_bo {
    width: auto;
    max-width: 100%;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    z-index: 1;
}

.sp_fiex {
    width: 100%;
    height: 100%;
    position: fixed;
    left: 0;
    top: 0;
    z-index: 100000;
    background: rgba(0 0 0 / 60%);
    opacity: 0;
    visibility: hidden;
}

.sp_fiex.active {
    opacity: 1;
    visibility: visible;
}

.sp_fiex_cen {
    width: 90%;
    max-width: 1300px;
    height: auto;
    max-height: 80%;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

.sp_fiex_cen video {
    width: 100%;
    height: auto;
}

.sp_fiex_close {
    font-size: 25px;
    position: absolute;
    right: -35px;
    top: -25px;
    color: #fff;
    cursor: pointer;
}

@media screen and (max-width: 768px) {
    .change li{
        margin-left: 5px;
    }
    
    .sec-des div{
        width: 100%;
        margin-bottom: 20px;
    }
    
    .cnumitem{
        flex: 0 0 48%;
        min-height: 100px;
        padding: 10px 20px;
        box-shadow: 0 0 10px rgba(0 0 0 / 8%);
    }
    
    .sp_box .sp_bo{
            max-width: 30px;
    }
}