@media screen and (max-width: 1200px){
    #past_review img{
        width: 100%;
        height: 160px;
    }
    .topicpc{
        display: none;
    }
    .topicm{
        width: calc(100% - 40px);
        margin-top: 20px;
        padding: 20px;
        display: block;
    }
    .topicm img{
        width: 100%;
    }
    .preface{
        margin: 0;
        padding: 0 20px;
    }
    .light{
        padding: 0 20px;
    }
    .guest{
        padding: 0 20px;
        background: #fff;
    }
    .past_review{
        padding: 0 20px;
    }
    .highlights{
        padding: 0 20px;
    }
    /* .column_title{
        width: 100%;
        height: 36px;
        background-position: center;
        background-size: cover;
        text-align: center;
    } */
    /* .column_title{
        margin: 0 auto;
        text-align: center;
        margin-top: 65px;
    } */
    .preface_text{
        width: 100%;
        background-repeat: no-repeat;
        background-size: contain;
    }
    .preface_ins{
        font-size: 16px;
        /* margin-top: -25px; */
        line-height: 26px;
    }
    .preface_text{
        /* padding-top: 80px; */
        background-size: 100% 100%;
    }
    .light_text{
        background: #fff;
        height: auto;
        margin-top: 100px;
    }
    .light_item{
        /* width: 48% !important; */
        margin-bottom: 20px;
    }
    .light_ins_top{
        width: 100%;
        padding-top: 0;
    }
    .light_ins_bottom{
        width: 100%;
        flex-wrap: wrap;
        justify-content: space-around;
    }
    .guest_ins{
        width: 100%;
    }
    .past_review{
        /* height: 300px; */
    }
    .highlights_tabs_btn{
        width: 100%;
    }
    .highlights_tabs{
        width: 100%;
    }
    .registration{
        padding: 0 20px;
    }
    .registration_box{
        width: 100%;
        background-size: 100% 100%;
        height: auto;
    }
    .categories_item{
        font-size: 18px;
        width: 32%;
    }
    .categories_item::before{
        vertical-align: middle;
    }
    .contact_text{
        width: 100%;
    }
    .contact ul{
        width: 100%;
    }
    .pary{
        padding: 0 20px;
    }
    .video_swiper{
        width: 100%;
        margin: 0 auto;
        overflow: hidden;
        position: relative;
        padding-top: 130px;
    }
    .welfare_ins{
        flex-direction: column;
    }
    .welfare_ins_item:nth-child(1){
        margin-top: 60px;
    }
    .welfare_ins_item:nth-child(2){
        margin-top: 60px;
    }
    .selection{
        width: 100%;
    }
    .selection_ins{
        background: none;
        height: auto;
    }
    .selection_ins .selection_tab_item{
        width: 90%;
        margin: 0 auto;
        background: none;
    }
    .selection_ins .selection_tab_btn{
        /* padding-top: 185px; */
    }
    .item_item{
        padding: 20px;
    }
    .circle{
        display: block;
        align-items: center;
        justify-content: center;
        padding-top: 30px;
        padding-bottom: 20px;
    }
    .circle p{
        width: 159px;
        height: auto;
        background-color: #dfae68;
        border: solid 0px #fafaf9;
        border-radius: 10px;
        z-index: 9;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 24px;
        color: #fff;
        line-height: 40px;
        text-align: center;
        margin: 0 auto;
    }
    .circle .text{
        width: 90%;
        height: auto;
        padding: 10px 20px;
        margin: 0 auto;
        margin-top: 20px;
    }
    .preface_after{
        width: 1200px;
        margin: 0 auto;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }
    .preface_text{
        width:1062px;
        height:211px;
        margin: 25px auto;
        border:5px solid #1A2F5B;
    }
    .preface_text p{
        color:#333333;
        font-size:16px;
        margin: 27px 55px;
    }
    .sjhg{
        margin: 0 auto;
        height: 675px;
        background: url(../img/sjhgbj.png) no-repeat;
    }
    .first_review{
        width: 1200px;
        margin: 0 auto;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }
    .first_review{
        width: 1200px;
        margin: 0 auto;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }
}

@media screen and (max-width: 800px){
    
    .pc{
        display: none;
    }
    .mobile{
        display: block;
    }

    .navigation {
        width: 100%;
        height: 100%;
        position: fixed;
        top: 0;
        left: 0;
        background-color: rgba(0, 0, 0, 0.8);
        z-index: 200;
        display: none;
    }
    .navigation .nav {
        width: auto;
        padding-top: 40px;
        display: flex;
        flex-wrap: wrap;
        justify-content: space-around;
        align-items: center;
        height: auto;
    }
    .navigation .nav li {
        width: 80%;
        float: left;
        height: 40px;
        display: inline;
        border: 0;
        margin-bottom: 10px;
    }
    .navigation .nav li a {
        /* display: block;
        font-size: 18px;
        color: #fff;
        line-height: 18px;
        margin-top: 11px;
        text-align: center;
        padding: 0 24px; */
        display: block;
        width: 80%;
        height: 30px;
        margin: 0 auto;
        margin-bottom: 20px;
        text-align: center;
        line-height: 30px;
        font-size: 13px;
        color: #fff;
        border: 1px solid #f4dea9;
        -webkit-border-radius: 10px;
        border-radius: 10px;
        text-decoration: none;
    }
    .nav_btn{
        display: block;
        position: fixed;
        width: 40px;
        height: 40px;
        top: 20px;
        right: 20px;
        background-color: rgba(0, 0, 0, 0.4);
        border-radius: 50%;
        z-index: 15;
    }
    .nav_btn::after, .nav_btn::before {
        content: "";
        position: absolute;
        top: 19px;
        left: 20%;
        width: 60%;
        height: 2px;
        background: #fff;
    }
    .nav_btn::after {
        top: 13px;
        background: transparent;
        border-top: 2px solid #fff;
        padding: 4px 0px;
        border-bottom: 2px solid #fff;
    }
    .preface_after{
        width: 100%;
        height:auto;
        margin: 0 auto;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }
    .preface_text{
        width:100%;
        height:auto;
        margin: 25px auto;
        border:5px solid #1A2F5B;
    }
    .preface_text p{
        color:#333333;
        font-size:14px;
        margin: 27px 55px;
    }
    .column_title img{
        display: block;
        width:50%;
        margin:0 auto;
    }
    .column_title{
        display:block;
    }
    .column_title_preface{
        margin-top:20px;
    }
    .sjhg{
        margin: 0 auto;
        height: 200px;
        background: url(../img/sjhgbj.png) no-repeat 100% 100%;
    }
    .first_review{
        width: 100%;
        margin: 0 auto;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }
    .first_review img{
        width:100%;
    }
    .wow img{
        width:50%;
        margin:0 auto;
    }
    
}