.banner {
    min-height: 100px;
    background-color: #f1f1f1;
    position: relative;
}
.banner img {
    display: block;
    width: 100%;
}
.banner .content {
    position: absolute;
    top:0;
    left: 0;
    width: 100%;
    height: 100%;
}
.banner .view-center {
    position: relative;
    color: #fff;
    height: 100%;
    padding: 0px 20px;
    box-sizing: border-box;
}
.banner .view-center .name {
    font-size: 60px;
}
.banner .view-center .des {
    font-size: 30px;
}
.banner img.wap {
    display: none;
}
.title {
    font-size: 30px;
    font-weight: bold;
    color: #000;
    margin-bottom: 20px;
    padding-left: 10px;
    padding-right: 10px;
}
.introduction {
    padding-top: 30px;
    padding-bottom: 30px;
}
.introduction .des {
    padding: 30px;
    font-size: 16px;
    font-family: fangsong;
}
.introduction .des p {
    margin-bottom: 16px;
}
.adv {
    background-image: url(/images/abount-us-adv.jpg);
    background-position: center center;
    background-repeat: no-repeat;
    padding: 50px 10px;
}
.adv .list {
    flex-wrap: wrap;
}
.adv .list .item {
    width: 25%;
    padding: 10px;
    box-sizing: border-box;
}
.adv .list .item .box {
    background-color: #fff;
    border-radius: 5px;
    padding: 0px 8px;
    min-height: 260px;
    box-shadow: 0px 0px 20px rgba(0,0,0,0.1);
}
.adv .list .item .name {
    font-size: 20px;
    font-weight: bold;
    margin-top: 10px;
}
.adv .list .item .des {
    font-size: 16px;
    margin-top: 10px;
    text-align: center;
    height: 45px;
}
@media screen and (max-width: 830px) {
    .banner .view-center .name{font-size: 45px;}
    .banner .view-center .des {font-size: 20px;}
    .adv .list .item .des{font-size: 14px;}
}
@media screen and (max-width: 730px) {
    .banner .view-center .name{font-size: 35px;}
    .adv .list .item .des{font-size: 14px;}
    .adv {
        background-size:cover;
    }
    .adv .list .item {
        width: 33.33%;
    }
}
@media screen and (max-width: 620px){ 
    .banner .view-center .name,
    .banner .view-center .des {
        text-align: center;
    }
    .banner img.wap {
        display: block;
    }
    .banner img.pc {
        display: none;
    }
}
@media screen and (max-width: 585px) {
    .adv .list .item {
        width: 50%;
    }
    .adv .list .item .name{
        font-size: 16px;
    }
    .adv .list .item .des {
        font-size: 14px;
    }
    .adv .list .item .box {
        min-height: 200px;
    }
}
@media screen and (max-width:500px) {

    .introduction .des {
        padding-top: 10px;
    }
}
@media screen and (max-width: 400px) {
    .banner .view-center .name{font-size: 20px;}
    .banner .view-center .des {font-size: 12px;}
    .adv .list .item {
        width: 100%;
    }
    .adv .list .item .box {
        min-height: 260px;
    }
}