我试着把卡片重叠在一起。有两张卡，卡1和卡2。因此，我想将它们彼此重叠，这样用户就知道Card2在Card1下方，因此我想将Card2倾斜到两侧。我写了下面的代码，但它只显示Card2。MainActivity.kt

class MainActivity : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            OverlappingCardsTheme {
                // A surface container using the 'background' color from the theme
                Surface(
                    modifier = Modifier.fillMaxSize(),
                    color = MaterialTheme.colorScheme.background
                ) {
                    OverlappingCards()
                }
            }
        }
    }
}
@Composable
fun OverlappingCards(){
    Box(modifier = Modifier.fillMaxSize()){
        Card(
            modifier = Modifier
                .size(200.dp, 300.dp)
                .offset(40.dp, 40.dp),
            elevation = CardDefaults.cardElevation(
                defaultElevation = 10.dp)
        ) {
            // Content of the first card
            Text(text = "Hello Card1")
        }
        Card(
            modifier = Modifier
                .size(200.dp, 300.dp)
                .offset(40.dp, 40.dp),
            elevation = CardDefaults.cardElevation(
                defaultElevation = 10.dp)
        ) {
            // Content of the first card
            Text(text = "Hello Card2")
        }
        
    }
}
@Preview(showBackground = true)
@Composable
fun GreetingPreview() {
    OverlappingCardsTheme {
    }
}