修改主页和机型信息展示页面

src/components/Navbar.css

@@ -45,16 +45,15 @@
 
 .nav-label {
   color: #333;
-  cursor: default;
+  cursor: pointer;
+  font-weight: 700;
+  display: inline-block;
+  position: relative;
 }
 
-.nav-item:hover .dropdown {
-  display: block;
-}
+.nav-item:hover .dropdown,
 .nav-item:hover .dropdown.mega {
-  display: flex;
-  flex-wrap: nowrap;
-  align-items: flex-start;
+  display: none;
 }
 .nav-item.open .dropdown {
   display: block;
@@ -130,13 +129,23 @@
   background: #fff;
   pointer-events: auto;
 }
-.nav-item.open .dropdown.mega,
-.nav-item:hover .dropdown.mega {
+.nav-item.open .dropdown.mega {
   display: flex;
   flex-wrap: nowrap;
   align-items: flex-start;
 }
 
+.nav-item.selected .nav-label::after {
+  content: '';
+  position: absolute;
+  left: 0;
+  right: 0;
+  bottom: -2px;
+  height: 2px;
+  background: #1890ff;
+  border-radius: 2px;
+}
+
 .mega-col {
   width: 320px;
   padding: 0 16px;