flat: 优化，还是使用原生Tabbar,empty优化

common/animation.css

@@ -190,4 +190,38 @@
 .btn-rubberBand:active {
     -webkit-animation-name: tada;
     animation-name: tada
+}
+
+@keyframes jelly {
+    0% {
+        transform: scale(1);
+    }
+
+    30% {
+        transform: scale(1.25, 0.75);
+    }
+
+    /* 压扁 */
+    40% {
+        transform: scale(0.75, 1.25);
+    }
+
+    /* 拉长 */
+    50% {
+        transform: scale(1.15, 0.85);
+    }
+
+    /* 稍微压扁 */
+    65% {
+        transform: scale(0.95, 1.05);
+    }
+
+    /* 稍微拉长 */
+    75% {
+        transform: scale(1.05, 0.95);
+    }
+
+    100% {
+        transform: scale(1);
+    }
 }

common/common.css

@@ -468,4 +468,8 @@ html {
 
 .grayscale {
     filter: grayscale(100%) opacity(0.6);
+}
+
+.height-100 {
+    height: 100%;
 }