.logo-cont {
    display: block;
    width: 233px;
    height: 40px;
    margin: 10px 0;

    background: url(../images/index/qy.png?v=1.3) no-repeat center top;
    background-size: 100%;
}



.logo-cont.night {
    background: url(/images/index/qy.png?v=1.3) no-repeat center top;
    background-size: 100% 40px;
}


.loginbtn{
    width: 80px;
    height: 30px;
    line-height: 30px;
    border-radius: 15px;
    border: none;
    background: linear-gradient(0deg,#5e76b4,#4b5f94);
    color: #fff;
    cursor: pointer;
}