.content {
    margin-top: 72px;
}
.search {
    width: 100%;
    position: fixed;
    height: 72px;
    left: 0;
    top: 0;
    background: #fff;
    z-index: 999;
}
.search_f {
    display: flex;
    height: 45px;
    background: #f5f5f5;
    color: #999;
    margin: 16px;
    border-radius: 4px;
    align-items: center;
    padding-left: 16px;
}
.search .icon-search {

}
.search span {

}