优化动画

src/components/IdleCard.vue

@@ -45,8 +45,8 @@
 .orb {
   position: relative;
   z-index: 1;
-  width: 48px;
-  height: 48px;
+  width: 72px;
+  height: 72px;
   border-radius: 50%;
   background: radial-gradient(circle at 35% 35%, #95de64, #52c41a);
   animation: breathe 4s ease-in-out infinite;