.fast {
    display: flex;
    width: 100%;
}

.space {
    flex: 1;
}

.mr10 {
    margin-right: 10rpx;
}

.btn {
    width: 100%;
    font-size: 22rpx;

}

.bottom {
    padding: 20rpx 30rpx;
    width: 690rpx;
    position: fixed;
    left: 0;
    bottom: 0;
    background: #FFFFFF;
    box-shadow: 0 -5rpx 10rpx 0 rgba(153, 153, 153, 0.1);
}

.course-action {
    display: flex;
    align-items: center;

}

.left {
    display: flex;
    flex-direction: column;
    align-items: center;
    font-size: 25rpx;
    line-height: 25rpx;

    color: #333333;
}

.mr40 {
    margin-right: 40rpx;
}

.btn2 {
    margin-left: 40rpx;
    width: 200rpx !important;
    font-size: 30rpx;
}