/* app下载导航 */
.head_app{
    width: calc(100% - 20px);
    max-width: 749px;
    background: #EDEDF0;
    height: 35px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: fixed;
    top: 0;
    padding: 0 10px;
    z-index: 999;
}
.img_logo{
    display: flex;
    align-items: center;
}
.img_logo img{
    width: 45px;
}
.img_logo span,.img_logo a{
    font-size: 12px;
    margin-left: 10px;
}
.down_btn{
    font-size: 12px;
    background: #FF7139;
    border-radius: 15px;
    padding: 3px 5px;
}
.down_btn a{
    color: #fff;
}