*{
    padding: 0;
    margin: 0;
}
ul li{
    list-style: none;
}
@media screen and (min-width: 1200px) {
    .box{
        width: 100%;
        position: relative;
    }
    .box_in{
        width: 1200px;
        margin: auto;
    }
    .banner{
        width: 100%;
        height: 122px;
        background: url(../img/bg.png) no-repeat center;
    }
    .banner p{
        width: 1200px;
        margin: auto;
        padding-top: 22px;
        display: flex;
        align-items: center;
        font-size: 23px;
        color: #fff;
        font-weight: bold;
        letter-spacing: 1px;
    }
    .banner p span{
        padding-left: 16px;
    }
    .nav{
        width: 1200px;
        height: 134px;
        position: absolute;
        background: #fff;
        top: 70px;
        box-shadow: #ccc 1px 1px 10px;
    }
    .nav div{
        display: flex;
        align-items: center;
        padding-left: 30px; 
        padding-top: 10px;
    }
    .nav div:nth-child(1){
        padding-top: 24px;
    }
    .nav div h3{
        font-size: 22px;
        color: #000;
    }
    .nav ul{
        display: flex;
    }
    .nav ul li{
        font-size: 16px;
        color: #000;
        padding: 8px 12px;
        cursor: pointer;
        margin-right: 10px;
    }
    .active{
        font-size: 18px;
        background: #178cff;
        color: #fff !important;
        border-radius: 4px;
    }
    .tit{
        padding-top: 120px;
    }
    .tit h3{
        font-size: 28px;
        color: #000;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .tit span{
        padding: 0 14px;
    }
    .content{
        margin-top: 40px;
        display: flex;
        flex-wrap: wrap;
        margin-right: -20px;
    }
    .first{
        margin-right: 20px;
        width: 285px;
        height: 280px;
        margin-bottom: 24px;
        box-shadow: #ccc 1px 1px 10px;
    }
    .content i{
        font-style:normal;
        display: inline-block;
        color: #178cff;
        background: #e1f0ff;
        padding: 5px 12px;
        border-radius: 30px;
        font-size: 15px;
        margin-top: 22px;
        margin-left: 14px;
        font-weight: bold;
    }
    .content div{
        width: 285px;
        height: 280px;
        margin-right: 20px;
        box-shadow: #ccc 1px 1px 10px;
        margin-bottom: 24px;
    }
    .content div dl dt img{
        display: block;
        width: 86px;
        height: 86px;
        border-radius: 50%;
        margin: auto;
        margin-top: 32px;
    }
    .content div dl dd b{
        display: block;
        padding-top: 14px;
        color: #666666;
        text-align: center;
    }
    .content div p{
        width: 136px;
        height: 39px;
        line-height: 39px;
        margin: auto;
        color: #fff;
        font-size: 18px;
        background: #178cff;
        text-align: center;
        border-radius: 5px;
        margin-top: 16px;
        letter-spacing: 1px;
        cursor: pointer;
    }
}
@media screen and (min-width: 768px) and (max-width: 1200px){

    .box{
        width: 100%;
        position: relative;
    }
    .box_in{
        width: 90%;
        margin: auto;
    }
    .banner{
        width: 100%;
        height: 1.4rem;
        background: url(../img/bg.png) no-repeat center;
    }
    .banner p{
        width: 90%;
        margin: auto;
        padding-top: 22px;
        display: flex;
        align-items: center;
        font-size: 0.26rem;
        color: #fff;
        font-weight: bold;
        letter-spacing: 1px;
    }
    .banner p span{
        padding-left: 16px;
    }
    .nav{
        width: 90%;
        height: 1.7rem;
        position: absolute;
        background: #fff;
        top: 1rem;
        box-shadow: #ccc 1px 1px 10px;
    }
    .nav div{
        display: flex;
        align-items: center;
        padding-left: 30px; 
        padding-top: 0.2rem;
    }
    .nav div:nth-child(1){
        padding-top: 0.34rem;
    }
    .nav div h3{
        font-size: 0.24rem;
        color: #000;
    }
    .nav ul{
        display: flex;
    }
    .nav ul li{
        font-size: 0.2rem;
        color: #000;
        padding: 0.08rem 0.14rem;
        cursor: pointer;
    }
    .active{
        font-size: 18px;
        background: #178cff;
        color: #fff !important;
        border-radius: 4px;
    }
    .tit{
        padding-top: 1.7rem;
    }
    .tit h3{
        font-size: 0.32rem;
        color: #000;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .tit span{
        padding: 0 14px;
    }
    .content{
        margin-top: 40px;
        display: flex;
        flex-wrap: wrap;
        margin-right: -0.2rem;
    }
    .first{
        margin-right: 0.2rem;
        width: 31%;
        margin-bottom: 24px;
        box-shadow: #ccc 1px 1px 10px;
    }
    .first img{
        width: 100%;
        height: 100%;
    }
    .content i{
        font-style: normal;
        display: inline-block;
        color: #178cff;
        background: #e1f0ff;
        padding: 0.06rem 0.16rem;
        border-radius: 30px;
        font-size: 0.18rem;
        margin-top: 0.26rem;
        margin-left: 0.2rem;
        font-weight: bold;
    }
    .content div{
        width: 31%;
        height: 100%;
        margin-right: 0.2rem;
        box-shadow: #ccc 1px 1px 10px;
        margin-bottom: 0.26rem;
        padding-bottom: 0.2rem;
    }
    .content div dl dt img{
        display: block;
        width: 0.9rem;
        height: 0.9rem;
        border-radius: 50%;
        margin: auto;
        margin-top: 0.2rem;
    }
    .content div dl dd b{
        display: block;
        padding-top: 0.16rem;
        color: #666666;
        text-align: center;
        font-size: 0.24rem;
    }
    .content div p{
        width: 1.4rem;
        height: 0.44rem;
        line-height: 0.44rem;
        margin: auto;
        color: #fff;
        font-size: 0.22rem;
        background: #178cff;
        text-align: center;
        border-radius: 5px;
        margin-top: 0.18rem;
        letter-spacing: 1px;
        cursor: pointer;
    }
}
@media screen and (max-width: 760px){
    .box{
        width: 100%;
        position: relative;
    }
    .box_in{
        width: 90%;
        margin: auto;
    }
    .banner{
        width: 100%;
        height: 1.4rem;
        background: url(../img/bg.png) no-repeat center;
    }
    .banner p{
        width: 90%;
        margin: auto;
        padding-top: 0.5rem;
        display: flex;
        align-items: center;
        font-size: 0.34rem;
        color: #fff;
        font-weight: bold;
        letter-spacing: 1px;
    }
    .banner p img{
        width: 0.08rem;
    }
    .banner p span{
        padding-left: 0.16rem;
    }
    .nav{
        width: 100%;
        height: 1.7rem;
        background: #fff;
    }   
    .nav div{
        display: flex;
        align-items: center;
        padding-top: 0.2rem;
    }
    .nav div:nth-child(1){
        padding-top: 0.34rem;
    }
    .nav div h3{
        font-size: 0.24rem;
        color: #000;
        white-space: nowrap;
    }
    .nav ul{
        display: flex;
    }
    .nav ul li{
        font-size: 0.2rem;
        color: #000;
        padding: 0.08rem 0.14rem;
        cursor: pointer;
    }
    .subject ul{
        width: 100%;
        white-space: nowrap;
        overflow: scroll;
    }
    .subject ul::-webkit-scrollbar {
        display: none; /* Chrome Safari */
    }
    .active{
        font-size: 18px;
        background: #178cff;
        color: #fff !important;
        border-radius: 4px;
    }
    .tit{
        padding-top: 0.5rem;
    }
    .tit h3{
        font-size: 0.32rem;
        color: #000;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    .tit span{
        padding: 0 14px;
    }
    .content{
        margin-top: 0.4rem;
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
    }
    .first{
        margin-right: 0.2rem;
        width: 48%;
        margin-bottom: 0.3rem;
        box-shadow: #ccc 1px 1px 10px;
    }
    .first img{
        width: 100%;
        height: 100%;
    }
    .content i{
        font-style: normal;
        display: inline-block;
        color: #178cff;
        background: #e1f0ff;
        padding: 0.1rem 0.22rem;
        border-radius: 30px;
        font-size: 0.18rem;
        margin-top: 0.26rem;
        margin-left: 0.2rem;
        font-weight: bold;
    }
    .content div{
        width: 48%;
        height: 100%;
        box-shadow: #ccc 1px 1px 10px;
        margin-bottom: 0.3rem;
        padding-bottom: 0.3rem;
    }
    .content div dl dt img{
        display: block;
        width: 1.2rem;
        height: 1.2rem;
        border-radius: 50%;
        margin: auto;
        margin-top: 0.2rem;
    }
    .content div dl dd b{
        display: block;
        padding-top: 0.26rem;
        color: #666666;
        text-align: center;
        font-size: 0.26rem;
    }
    .content div p{
        width: 2rem;
        height: 0.68rem;
        line-height: 0.68rem;
        margin: auto;
        color: #fff;
        font-size: 0.22rem;
        background: #178cff;
        text-align: center;
        border-radius: 5px;
        margin-top: 16px;
        letter-spacing: 1px;
        cursor: pointer;
    }
}