cola(function(model){
});
<v-box style="width:100%">
<box style="height: 100px"></box>
<flex-box>
</flex-box>
<box style="height: 100px"></box>
</v-box>
v-box > box, h-box > box {
background-color: rgba(114, 207, 255, 0.56);
}
v-box > flex-box, h-box > flex-box {
background-color: rgba(16, 142, 233, 0.64);
}