.secret-num {
    width: 20rem;
    height: 4rem;
    border: 1px solid #999999;
    margin: 0 auto;
    position: relative;
}

.secret-num .real-ipt {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4rem;
    line-height: 4rem;
    opacity: 0;
    z-index: 3;
}

.secret-num .surface-ipts {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4rem;
    line-height: 4rem;
    z-index: 1;
    overflow: hidden;
}

.secret-num .surface-ipts .surface-ipt {
    height: 4rem;
    line-height: 4rem;
    display: flex;
    justify-content: space-between;
}

.secret-num .surface-ipts .surface-ipt input {
    width: 3.32rem;
    height: 3.8rem;
    line-height: 3.8rem;
    border: 0;
    border-right: 1px solid #999999;
    color: #333333;
    font-size: 3.8rem;
    text-align: center;
    padding: 0;
}

.pay-part .btns {
    margin: .48rem 0;
}