feat: 添加固定顶部导航和右侧面板粘性效果

Signed-off-by: wangsimiao1 <wangsimiao1@xiaomi.com>

Author: WangSimiao2000

assets/css/jekyll-theme-chirpy.scss

@@ -19,3 +19,18 @@ html {
 html::-webkit-scrollbar {
   display: none; /* Chrome, Safari, Opera */
 }
+
+/* Keep topbar sticky at the top (stays within main-wrapper, won't overlap sidebar) */
+#topbar-wrapper {
+  position: -webkit-sticky;
+  position: sticky;
+  top: 0;
+  z-index: 1030;
+}
+
+/* Keep right panel (trending tags + recent updates) always sticky */
+#panel-wrapper > .access {
+  position: -webkit-sticky !important;
+  position: sticky !important;
+  top: 5rem;
+}