refactor(projects): 单独一级路由相关逻辑重构

src/styles/css/global.css

@@ -1,4 +1,5 @@
 @import './scrollbar.css';
+@import './transition.css';
 
 html, body, #app {
 	height: 100%;

src/styles/css/transition.css

@@ -0,0 +1,13 @@
+/* fade-slide */
+.fade-slide-leave-active,
+.fade-slide-enter-active {
+  transition: all 0.3s;
+}
+.fade-slide-enter-from {
+  opacity: 0;
+  transform: translateX(-30px);
+}
+.fade-slide-leave-to {
+  opacity: 0;
+  transform: translateX(30px);
+}