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@keyframes x {
from { left: 0; }
}
@keyframes y {
from { top: 0; }
}
@keyframes x-ubox {
from { left: 0; }
to { left: calc(100vw - 240px); }
}
@keyframes y-ubox {
from { top: 0; }
to { top: calc(100vh - 45px); }
}
