精簡選隊伍頁提示並更新 README

src/App.css

@@ -178,6 +178,37 @@
   background: rgba(255, 214, 224, 0.94);
 }
 
+.floating-status-bubble {
+  position: fixed;
+  left: 50%;
+  top: 50%;
+  z-index: 60;
+  transform: translate(-50%, -50%);
+  min-width: min(78vw, 320px);
+  max-width: min(84vw, 420px);
+  padding: 14px 20px;
+  border-radius: 999px;
+  text-align: center;
+  font-weight: 700;
+  color: #f8fff9;
+  background: linear-gradient(135deg, rgba(8, 47, 73, 0.96), rgba(10, 96, 84, 0.92));
+  box-shadow: 0 18px 40px rgba(8, 47, 73, 0.28);
+  pointer-events: none;
+  animation: status-bubble-in 0.18s ease-out;
+}
+
+@keyframes status-bubble-in {
+  from {
+    opacity: 0;
+    transform: translate(-50%, calc(-50% + 10px)) scale(0.96);
+  }
+
+  to {
+    opacity: 1;
+    transform: translate(-50%, -50%) scale(1);
+  }
+}
+
 .selection-shell,
 .selection-form,
 .group-board {