@media (max-width: 767px) {
    .ys-phfy a {
        display:none;
    }

    .preface-box {
        padding: 3rem 0;
    }

    .preface-box .preface-tit {
        font-size: 1.3rem;
        line-height: 3rem;
    }

    .preface-box .preface-tit2 {
        font-size: 1.6rem;
        /* line-height: .6rem; */
    }

    .preface-box .img {
        width: 100%;
        float: none;
        margin-left: 0;
        margin-top: 2rem;
        margin-bottom: 2rem;
    }

    .preface-box .text {
        position: relative;
        width: 100%;
        margin-top: .3rem;
        font-size: 1.1rem;
        line-height: 2rem;
        right: 0;
    }

    .preface-box .yin {
        width: .2rem;
        height: .14rem;
    }

    .preface-box .text span {
        font-size: 1.5rem;
    }

    .answer-box {
        padding: 3rem 0;
    }

    .answer-box .con {
        font-size: 1.2rem;
        line-height: 1.1rem;
    }

    .answer-box .big-text {
        line-height: .5rem;
        margin: 0rem 0;
    }

    .answer-box .big-text .txt1 {
        font-size: 4rem;
    }

    .answer-box .big-text .txt2 {
        font-size: .5rem;
        margin-top: .2rem;
    }

    .important-box {
        height: 19rem;
    }

    .important-box .text-box {
        line-height: 1rem;
    }

    .important-box .text-box .tit1 {
        /* font-size: .6rem; */
    }

    .important-box .text-box .tit2 {
        /* font-size: .8rem; */
    }

    .key-box {
        padding: 1rem 0;
    }

    .key-wrap {
        margin-top: .4rem;
    }

    .key-box .tit {
        font-size: .5rem;
        line-height: .6rem;
    }

    .key-box .left .con {
        font-size: .24rem;
        line-height: .4rem;
    }

    .key-box .right .now {
        font-size: .24rem;
        line-height: .4rem;
        height: .4rem;
        margin-bottom: .4rem;
    }

    .key-box .right .list {
        /* width: 80%; */
    }

    .key-box .right .list .item {
        margin-bottom: .3rem;
    }

    .key-box .right .list .txt, .key-box .right .list .txt2 {
        font-size: .24rem;
        line-height: .4rem;
    }

    .key-box .right .list .txt2 {
        width: 15%;
    }

    .key-box .right {
        width: 100%;
        margin-top: .8rem;
    }

    .key-box .right .list .line {
        margin: 0 9%;
        width: 50%;
    }

    .change-box {
        /* height: 4.9rem; */
    }

    .change-box .text-box .tit1 {
        font-size: 1.3rem;
        line-height: 2rem;
    }

    .change-box .text-box .tit2 {
        font-size: 1.3rem;
        line-height: 2rem;
        margin-top: .3rem;
    }

    .point-list {
        padding: .5rem 0;
    }

    .point-list .desc {
        /* padding-bottom: .4rem; */
        /* font-size: .4rem; */
        /* line-height: .5rem; */
    }

    .point-list li {
        padding: .8rem 0;
    }

    .point-list li .red-tit {
        /* font-size: .4rem; */
        /* line-height: .5rem; */
    }

    .point-list li .tit {
        /* font-size: .7rem; */
        /* line-height: .8rem; */
        /* margin-top: .2rem; */
    }

    .point-list li .con {
        /* font-size: .24rem; */
        /* line-height: .4rem; */
        /* margin-top: .2rem; */
    }

    .point-foot {
        /* padding: .8rem 0; */
    }

    .point-foot .en {
        /* font-size: .48rem; */
        /* line-height: .58rem; */
    }

    .point-foot .cn {
        /* font-size: .5rem; */
        /* line-height: .6rem; */
        /* margin-top: .2rem; */
    }

    .key-box {
        padding: 4rem 0 4rem;
        font-family: "PingFang SC","Source Han Sans CN","Microsoft YaHei", "Microsoft JhengHei","Helvetica Neue", Helvetica, "Heiti SC",Arial, sans-serif;
        font-weight: 400;
        background: #fff;
    }

    .key-wrap {
        margin-top: 2rem;
    }

    .key-box .left {
        float: none;
        width: 100%;
    }

    .key-box .tit {
        font-size: 1.8rem;
        line-height: 1.4rem;
        color: #222;
    }

    .key-box .left .con {
        font-size: 1.1rem;
        line-height: 0rem;
        color: #222;
    }

    .key-box .right {
        float: right;
        width: 38.69%;
        font-family: "PingFang SC","Source Han Sans CN","Microsoft YaHei", "Microsoft JhengHei","Helvetica Neue", Helvetica, "Heiti SC",Arial, sans-serif;
        font-weight: 400;
        display: none;
    }

    .answer-box .con p {
    }

    .home-solution {
        padding-bottom: 50px;
    }

    .i-banner .text2 .tab-ul .li {
        margin-right: 1.7rem;
        /* margin-left: 0.1rem; */
    }
}