body,html {
    width:100%;
    height:100%;
}
.bg {
    width:100%;
    height:100%;
    background:url(../img/bg.png)center no-repeat;
    background-size:cover;
}
.top {
    background:url(../img/top.png)center no-repeat;
    width:100%;
    height:100px;
    background-size:cover;
    text-align:center;
    line-height:80px;
}
.top span {
    color:#fff000;
    font-family: "SourceHanSansCN-Bold";
    font-size:35px;
}
.list {
    display:flex;
    justify-content:center;
    align-items:center;
    margin-top:11vh;
}
.list .item {
    width:400px;
    height:580px;
    margin:0 50px;
    display:flex;
    justify-content:center;
    flex-direction: column;
    align-items:center;
    cursor:pointer;
    background-size:100% 100%;
}
.list .item .tit {
    color:#fff000;
    font-family: "SourceHanSansCN-Medium";
    font-size:24px;
    margin-top:100px;
    width:100%;
    text-align:center;
}
.list .item .tit:after {
    content:"";
    display:block;
    width:100%;
    height:60px;
    background:url(../img/tit_bg.png)center no-repeat;
    background-size:auto 60px;
    
}
@media screen and (max-width:600px){
   .top {
    background:url(../img/mtop.png)center no-repeat;
    height:15.33vw;
    background-size:auto 100%;
    line-height:14vw;
   
   }
   .top span {
     font-size:5vw;
   }
   .list {
    display:block;
    margin-top:5vh;
   }
   .list .item {
    width:92vw;
    height:53.33vw;
    background-size:100% 100%;
    flex-direction: row;
    margin:2vh auto;
   }
   .list .item:nth-child(2n) {
    flex-direction: row-reverse;
   }
   .list .item .imgc {
    width:40vw;
    margin-right:18.8vw;
   }
   .list .item:nth-child(2n) .imgc{
    margin-left:18.8vw;
    margin-right:0;
    
   }
   .list .item .tit {
    font-size:3vw;
    width:3vw;
    display:flex;
    align-items:center;
    justify-content:center;
    margin-top:0;
    line-height:3.7vw;
   }
   .list .item .tit_icon {
    width:7.73vw;
   }
   .list .item .tit:after {
    background:url(../img/tit_mbg.png)center no-repeat;
    width:7.73vw;
    height:46.67vw;
    background:100% 100%;
   }
}