.collection_title{height: 80px; display:flex;justify-content:space-between;align-items: center;padding:50px;
}
@media screen and (min-width: 1240px) {
    .collection_title{height: 80px; display:flex;justify-content:space-between;align-items: center;padding:18px 150px;margin-bottom: 30px; box-shadow: 0 2px 3px 0 rgba(0, 0, 0, 0.1);
        position: sticky; top: 0; background-color: white;z-index: 1;
     }
}
.collection_title div{position:relative}
.collection_title div select{direction:rtl;padding-right:12px;border:none;cursor:pointer;color:#999;font-size:14px;letter-spacing:1px}
.collection_title div img{width:10px;position:absolute;right:0;top:9px;opacity:.5}
.collection_content{display:flex;margin-bottom:30px;margin-left: 5%;margin-right: 5%;}
.collection_group{
    width: 100%;
}
@media only screen and (max-width:1240px){.collection_group .hotItems .hotItem{width:50%}
.collection_title{padding:50px 20px}
}
@media only screen and (max-width:1000px){.mobile_show{display:block!important}
.collection_filter{width:0}
.collection_title{padding:30px}
}
@media only screen and (max-width:640px){
    .collection_content{display:block;padding-left:0}
}