.container .contentNav {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    margin:34px 0  ;
}
.container .contentNav .menuBtn {
    position: relative;
    margin: 0 62px 24px;
    height: 36px;
    font-size: 18px;
    font-family: Adobe Heiti Std;
    font-weight: normal;
    color: #999999;
    cursor: pointer;
}
.container .contentNav .menuBtn.active {
    color: #004080;
}
.container .contentNav .menuBtn.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 42px;
    height: 1px;
    background: #004080;
    transform: translateX(-50%);
}
.container .mainContent{
    display: flex;
    flex-wrap: wrap;
    margin: 0 auto 80px;
    width: 1200px;
}
.container .mainContent img{
    margin-right: 46px;
    width: 496px;
    transition: width 1s,margin 1s;
}
.container .mainContent img:hover{
    margin-right: 36px;
    width: 506px;
}
.container .mainContent .text{
    max-width: 644px;
}
.container .mainContent .text h1{
    margin: 20px 0 28px;
    font-size: 24px;
    font-family: PingFang;
    font-weight: bold;
    color: #333333;
    line-height: 25px;
}
.container .mainContent .text p{
    font-size: 14px;
    font-family: PingFang;
    font-weight: 500;
    color: #666666;
    line-height: 25px;
}
@media only screen and (max-width:1200px ){
    .container .contentNav{
        margin: 18px 0;
    }
    .container .contentNav .menuBtn{
        margin-left: 10px;
        margin-right: 10px;
        margin-bottom: 0;
        font-size: 12px;
        height: auto;
        line-height: 30px;
    }
    .container .contentNav .menuBtn.active::after{
        width: 22px;
    }
    .container .mainContent{
        width: 100%;
    }
    .container .mainContent img{
        padding: 0 20px;
        margin: 0;
        width: 100%;
        box-sizing: border-box;
    }
    .container .mainContent img:hover{
        margin-right: 0;
        width: 100%;
    }
    .container .mainContent .text{
        margin: 0 20px;
    }
}