feat: 官网通知 banner 预留

src/sites/doc/views/Main.vue

@@ -1,4 +1,7 @@
 <template>
+  <div class="v3-banner" :class="{ active: false }"
+    >NutUI 现已发布 Vue3.x 版本，带来更强大的功能和出色的体验</div
+  >
   <doc-header></doc-header>
   <div class="doc-content" :class="themeName()">
     <div class="doc-content-index">
@@ -319,6 +322,26 @@ export default defineComponent({
 });
 </script>
 <style lang="scss">
+.v3-banner {
+  position: fixed;
+  top: 0;
+  transition: all 0.3s;
+  &.active {
+    top: $doc-header-height;
+  }
+  font-size: 14px;
+  width: 100%;
+  z-index: 1;
+  text-align: center;
+  padding: 10px 60px;
+  color: #fff;
+  background: linear-gradient(
+    135deg,
+    rgba(242, 20, 12, 1) 0%,
+    rgba(232, 34, 14, 1) 69.83950099728881%,
+    rgba(242, 77, 12, 1) 100%
+  );
+}
 @keyframes fadeInLeft {
   from {
     opacity: 0;