style: 优化页面打印样式并调整导航栏高亮指示器

src/app.css

@@ -321,6 +321,15 @@ a:hover {
 	.header nav .nav-dropdown:hover .dropdown-menu {
 		display: block;
 	}
+	.header nav a.active::after,
+	.header nav .nav-dropdown-trigger.active::after {
+		top: 0;
+		bottom: 0;
+		left: 0;
+		right: auto;
+		width: 4px;
+		height: 100%;
+	}
 }
 
 /* DoIt Style Home Profile */
@@ -1530,3 +1539,15 @@ footer section p:first-child {
 	object-fit: contain;
 	border-radius: 0;
 }
+
+/* 打印优化 */
+@media print {
+	/* 隐藏目录、浮动按钮面板、页脚、顶栏导航 */
+	.TOC,
+	#ctrler-panel,
+	footer,
+	header nav,
+	header .mobile-menu-btn {
+		display: none !important;
+	}
+}