main .about .about_list{
    border-bottom: 1px solid #e5e5e5;
}
main .about .about_list ul{
    display: flex;
    width: 100%;
    overflow-x: auto;
}
main .about .about_list ul li{
    position: relative;
}
main .about .about_list ul li a{
    display: flex;
    padding: 0.3rem 0.2rem;
    font-size: 0.2rem;
    color: #888;
    white-space: nowrap;
}
main .about .about_list ul li.active a{
    color: #039b46;
    font-family: 'Medium';
}

main .about .about_list ul li::after{
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    left: 0;
    width: 1px;
    height: 20px;
    background-color: #e5e5e5;
    content: '';
}
main .about .about_list ul li.active::before{
    position: absolute;
    left:50%;
    transform: translateX(-50%);
    bottom: 0;
    width: calc(100% - 0.2rem);
    height: 2px;
    background-color: #039b46;
    content: '';
}

main .about .history{
    padding-top: 1rem;
}
main .about .history .text{
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
}
main .about .history .text p{
    color: #414141;
    text-align: center;
}
main .about .history .text img{
    margin-top: 0.5rem;
}

main .about .development{
    padding: 1rem 0;
} 
main .about .development .cart .img{
    overflow: hidden;
}
main .about .development .cart .img img{
    width: 100%;
    transition: all 0.5s;
}
main .about .development .cart:hover .img img{
    transform: scale(1.1);
}
main .about .development .cart span{
    font-size: 0.28rem;
    font-family: 'Medium';
    color: #039b46;
    margin-top: 10px;
    margin-bottom: 20px;
    display: block;
}
main .about .development .row{
    margin-left: -0.25rem;
    margin-right: -0.25rem;
}
main .about .development .row .col-md-3{
    padding-left: 0.25rem;
    padding-right: 0.25rem;
}
main .about .development .row .line{
    width: 100%;
    height: 2px;
    background-color: #e5e5e5;
    margin: 0.5rem 0;
    position: relative;
}
main .about .development .row .line::after{
    position: absolute;
    width: 16px;
    height: 16px;
    border: 2px solid #E5E5E5;
    border-radius: 50%;
    top: 50%;
    transform: translateY(-50%);
    left: 0;
    content: '';
    background-color: #fff;
    z-index: 8;
}
main .about .development .row .line::before{
    position: absolute;
    width: 6px;
    height: 6px;
    top: 50%;
    border-radius: 50%;
    transform: translateY(-50%);
    left: 7px;
    content: '';
    background-color: #e5e5e5;
    z-index: 9;
}
main .about .development .cart ul li{
    padding-left:16px;
    color: #888;
    position: relative;
    margin-bottom: 8px;
}
main .about .development .cart ul li::after{
    position: absolute;
    top: 7px;
    left: 0;
    width: 5px;
    height: 5px;
    background-color: #039b46;
    content: '';
    border-radius: 50%;

}



@media (max-width:1023px) {
    main .about .development .row .line{
        display: none;
    }
}



@media (max-width:767px) {
    main .about .development .cart{
        margin-bottom: 0.3rem;
    }
    main .about .development .cart span{
        font-size: 0.32rem;
        margin-bottom: 10px;
    }
    
}