.banner{
    width: 100%;
}
.banner img{
    width: 100%;
    height: auto;
    vertical-align: middle;
}
.breadcrumb{
    background-color: #f8f7f7;
}
.breadcrumb-nav{
    width: 100%;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.breadcrumb-nav .l-nav{
    display: flex;
    align-items: center;
}
.breadcrumb-nav .l-nav .home{
    position: relative;
}
.breadcrumb-nav .l-nav>span{
    font-size: 16px;
    color: #231815;
    margin: 0 15px ;
}
.r-select{
    height: 90px;
    width: 220px;
    border: none;
    text-align: center;
    position: relative;
}
.r-select span{
    display: block;
    width: 100%;
    height: 100%;
    font-size: 16px;
    color: #fff;
    background-color: #3c7de6;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 5px;
}

.r-select span::after{
    content: "";
    width: 14px;
    height: 14px;
    background: url(../images/next.png) no-repeat;
    position: absolute;
    top:45px;
    left: 160px;
}
.r-select ul{   
    display: none;
    width: 100%;
    position: absolute;
}
.r-select ul li{
    width: 100%;
    font-size: 16px;
    text-align: center;
    line-height: 60px;
    color: #fff;
    background-color: #3c7de6;
    border-top: 1px solid rgba(153, 153, 204, .3);
    z-index: 99;
}

/*焊接介绍*/
.intro{
    margin-bottom: 100px;
}
.intro .inner .content{
    margin-top: 130px;
    display: flex;
}
.intro .inner .content .img{
    overflow: hidden;
}
.intro .inner .content .img img{
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.intro .inner .content .img1{
    margin-right: 20px;
}
.intro .inner .content .text{
    width: 38%;
    padding-top: 50px;
    overflow: hidden;
    text-overflow:ellipsis;
}
.intro .inner .content .text p{
    font-size: 15px;
    line-height: 32px;
    color: #161616;
    text-align: center;
}
.chart{
    margin-top: 100px;
    margin-bottom: 500px;
    margin: 0 auto;
    width: 100%;
}
.chart .img{
    width: 100%;
    margin: 0 auto;
}
.chart .img img{
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.chart .content{
    width: 75%;
    margin: 0 auto;
    display: flex;
    justify-content:space-between;
    position: relative;
    z-index: 99;
    top: -155px;
}
.chart .content .r-box,.chart .content .l-box{
    background-color: #f8f7f7;
    height: 310px;
    width: 50%;
    padding-top: 50px;
    padding-left: 80px;
}
.chart .content .l-box h5,.chart .content .r-box h5{
    font-size: 20px;
    color: #161616;
}
.chart .content .l-box{
    margin-right: 20px;
}
.chart .content .r-box{
    padding-right: 50px;
}
.chart .content .l-box p{
    line-height: 24px;
    font-size: 14px;
}
.chart .content .r-box span{
    display: inline-block;
    padding: 6px 16px;
    margin-right: 5px;
    border: 1px solid #dcdcdc;
    margin-top: 10px;
}
.chart .img .content .line{
    display: block;
    width: 100px;
    border-bottom: 3px solid #353535;
    margin: 20px 0;
}
@media screen and (max-width: 1440px){
    .intro .inner .content .text{
        width: 40%;
        padding-top: 20px;
        padding-left: 30px;
    }
    .intro .inner .content .text p{
        line-height: 24px;
    }
}
@media screen and (max-width: 980px){
    .intro .inner .content{
        margin-top: 80px;
        flex-wrap: wrap;
        
    }
    .intro .inner .content .img1{
        width: 35.66%;
    }
    .intro .inner .content .img2{
        width: 61.06%;
    }
    .intro .inner .content .text{
        width: 100%;
    }
    .chart .content{
        display: block;
        position: static;
        margin-bottom: 100px;
    }
    .chart .content .r-box,.chart .content .l-box{
        width: 100%;
        margin-top: 30px;
    }
}
@media screen and (max-width: 750px){
    .intro .inner .content .img1{
        margin-right: 0px;
    }
    .chart .content {
        width: 90%;
    }
    .chart .content .r-box,.chart .content .l-box{
        height: auto;
        padding-top: 20px;
        padding-left: 10px;
        padding-bottom: 20px;
    }
}