*{
    margin: 0;
    padding: 0;
}

.box{
    max-width: 100%;
    margin: 0 auto;
}

.topbg .nav{
    width: 1240px;
    margin: 0 auto;
    line-height: 60px;
}
.topbg .nav .logo{
    float: left;
    display: block;
    margin-right: 80px;
}
.topbg .nav .logo img{
    margin: 14px 0;
}
.topbg .nav ul{
    overflow: hidden;
}
.topbg .nav ul li{
    list-style-type: none;
    float: left;
    margin: 0 20px;
}
.topbg .nav ul a{
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    color: #45B767;
    position: relative;
}
.topbg .nav ul a.active::after{
    content: '';
    width: 100%;
    border: 2px solid ;
    position: absolute;
    bottom: -13px;
    left: 0;
}

.part img{
    max-width: 100%;
}

.foot{
    background-color: black;
}
.foot .mid{
    padding: 30px 0;
    max-width: 1200px;
    margin: 0 auto;
    color: #d3d3d5;
}
.foot .company{
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
    font-size: 14px;
}
.foot .company .tit{
    font-size: 18px;
    margin-bottom: 20px;
}
.foot .company .tel{
    margin-bottom: 10px;
}
.foot .company .tel span{
    font-size: 20px;
}
.foot .company .right{
    text-align: right;
}
.foot .company .logo{
    margin-bottom: 5px;
}
.foot .copyright .cbot{
    margin-bottom: 5px;
}
.foot .copyright a{
    text-decoration: none;
    color: #d3d3d5;
}
.foot .desc{
    font-size: 12px;
    text-align: center;
    color: #80818c;
}