.nav{
    position: relative;
    left: 0;
    top: 0;
    z-index: 10;
}
.nav-title{
    position: absolute;
    left: 20rpx;
    /*top: 32rpx;*/
    z-index: 10;
    text-align: left;
    font-size:30rpx;
    letter-spacing:2px;
}

.footer {
    position: fixed;
    bottom: 0;
    width: 100%;
}
