.submitBtn {
    box-sizing: border-box;
    position: absolute;
    width: 600rpx;
    left: 50%;
    margin-left: -300rpx;
    bottom: 120rpx;
    border-radius: 10rpx;
    padding: 20rpx;
    background: #4e96f8;
    color: white;
    font-size: 30rpx;
    text-align: center;
}