.banner{
    width: 100%;
    height: 400px;
    background: url(/assets/index/images/about1.jpg) no-repeat center;
    margin-top: 80px;
}
.top{
    width: 100%;
    height: auto;
    overflow: hidden;
}
.top .top-name{
    width: 100%;
    height: auto;
    overflow: hidden;
    font-size: 36px;
    font-weight: bold;
    color: #013ca6;
    text-align: center;
    line-height: 46px;
    margin-top: 30px;
}
.top .top-span{
    width: 100%;
    height: auto;
    overflow: hidden;
    font-size: 18px;
    color: #999999;
    line-height: 30px;
    text-align: center;
}
.title{
    width: 100%;
    height: 60px;
    background: #ffffff;
    overflow: hidden;
    border-bottom: 1px solid #eeeeee;
    box-sizing: border-box;
}
.title .title-ul{
    width: 600px;
    height: 60px;
    display: flex;
    justify-content: space-between;
    margin: 0 auto;
}
.title-ul .title-li{
    display: block;
    width: 200px;
    height: 60px;
    font-size: 24px;
    color: #333333;
    text-align: center;
    line-height: 60px;
}
.title-li.active{
    background: #013ca6;
    color: #ffffff;
}
.about{
    width: 100%;
    height: auto;
    overflow: hidden;
}

.about .about-box{
    width: 100%;
    height: auto;
    overflow: hidden;
    display: flex;
    justify-content: space-between;
    margin-top: 30px;
}
.about-box .about-le{
    width: 590px;
    height: auto;
    overflow: hidden;
}
.about-le .about-text{
    width: 100%;
    height: auto;
    overflow: hidden;
    font-size: 16px;
    color: #666666;
    line-height: 30px;
    margin-top: 10px;
    text-indent: 2em;
    text-align: justify;
}
.about-box .about-ri{
    width: 581px;
    height: 250px;
}

.range{
    width: 100%;
    height: 320px;
    background: url(/assets/index/images/about3.jpg) no-repeat center;
    overflow: hidden;
    margin-top: 60px;
}
.range .top-name{
    color: #ffffff;
}
.range .top-span{
    color: #ffffff;
}
.range .top{
    margin-bottom: 25px;
}
.range .range-text{
    width: 100%;
    height: auto;
    overflow: hidden;
    font-size: 16px;
    color: #eeeeee;
    line-height: 30px;
    text-indent: 2em;
    margin-top: 10px;
    text-align: justify;
}

.business{
    width: 100%;
    height: auto;
    overflow: hidden;
}
.business .bus-box{
    width: 100%;
    height: 300px;
    display: flex;
    justify-content: space-between;
    margin-top: 30px;
}
.bus-box .bus-item{
    width: 600px;
    height: 300px;
    position: relative;
    overflow: hidden;
}
.bus-item .bus-on{
    width: 100%;
    height: 100%;
    overflow: hidden;
    position: absolute;
    top: 0;
    left: 0;
}
.bus-on .bus-icon{
    width: 44px;
    height: 39px;
    margin: 80px auto 0;
}
.bus-on .bus-name{
    width: 100%;
    height: auto;
    overflow: hidden;
    font-size: 24px;
    color: #ffffff;
    text-align: center;
    line-height: 34px;
    margin-top: 35px;
}
.bus-on .bus-text{
    width: 100%;
    height: auto;
    overflow: hidden;
    font-size: 18px;
    color: #eeeeee;
    text-align: center;
    line-height: 30px;
    margin-top: 10px;
}

.brand{
    width: 100%;
    height: auto;
    overflow: hidden;
    background: #f8f8f8;
    margin-top: 60px;
}
.brand .brand-box{
    width: 100%;
    height: auto;
    overflow: hidden;
    margin-top: 10px;
    margin-bottom: 35px;
}
.brand-box .brand-item{
    width: 285px;
    height: 100px;
    float: left;
    margin-right: 20px;
    margin-top: 25px;
}
.brand-item:nth-of-type(4n){
    margin-right: 0;
}