.top{
    margin: 0px auto;
    overflow: hidden;
    /* auto没用不知道怎么调所以用了上课提了一嘴的弹性盒子 */
    display: flex;
    align-items: center;
    justify-content: center;
}
.top .logo img{
    height: 88px;
    width: 272px;
    margin-top: 6px;
    float: left;
}

.search{
    padding-top: 18px;
    margin-left: 64px;
    float: left;
}
.search .search_up{
    margin-bottom: 8px;


}
.search .search_up ul{
    font-size: 12px;
    color: #333;
    overflow: hidden;
}
.search .search_up ul .ps{
    font-weight: 700;
}

.search .search_up li{
    margin-right: 15px;
    float: left;

}

.search .search_down{
    overflow: hidden;

}
.search .search_down input{
    width: 368px;
    height: 20px;
    padding: 7px 10px;
    border: 1px solid #ccc;
    border-right: none;
    float: left;
}
.search .search_down .button{
    width: 80px;
    height: 36px;
    background: #3686f1;
    font-size: 16px;
    float: right;
    color: #ffffff;
    text-align: center;
    line-height: 36px;
}


.icon{
    margin-top: calc(16px + 18px + 8px - 2px);
    float: left;
    margin-left: 12px;
}
.icon li{
    display: inline-block;
    font-size: 12px;
    text-align: center;
}
.icon li:nth-child(2){
    margin: 0 18px;
}
.icon li a{}
.icon li a img{
    width: 20px;
    height: 20px;
}
.icon li a div{}