style: highlight active sidebar link; use SEO title on homepage

Author: zhaoyang97

docs/stylesheets/extra.css

@@ -250,6 +250,39 @@
   fill: rgba(255,255,255,.7);
 }
 
+/* ── Sidebar: highlight the currently opened note/page ── */
+.md-sidebar--primary a.md-nav__link.md-nav__link--active,
+.md-sidebar--primary label.md-nav__link.md-nav__link--active[for="__toc"] {
+  margin: 0.12rem 0;
+  padding: 0.32rem 0.55rem 0.32rem 0.7rem;
+  border-radius: 6px;
+  background: rgba(124, 77, 255, 0.1);
+  box-shadow: inset 3px 0 0 var(--md-accent-fg-color);
+  color: var(--md-accent-fg-color) !important;
+  font-weight: 700;
+}
+
+.md-sidebar--primary a.md-nav__link.md-nav__link--active .md-ellipsis,
+.md-sidebar--primary label.md-nav__link.md-nav__link--active[for="__toc"] .md-ellipsis {
+  color: inherit;
+}
+
+.md-sidebar--primary a.md-nav__link.md-nav__link--active:hover,
+.md-sidebar--primary label.md-nav__link.md-nav__link--active[for="__toc"]:hover {
+  background: rgba(124, 77, 255, 0.16);
+}
+
+[data-md-color-scheme="slate"] .md-sidebar--primary a.md-nav__link.md-nav__link--active,
+[data-md-color-scheme="slate"] .md-sidebar--primary label.md-nav__link.md-nav__link--active[for="__toc"] {
+  background: rgba(167, 139, 250, 0.16);
+  color: rgba(255, 255, 255, 0.95) !important;
+}
+
+[data-md-color-scheme="slate"] .md-sidebar--primary a.md-nav__link.md-nav__link--active:hover,
+[data-md-color-scheme="slate"] .md-sidebar--primary label.md-nav__link.md-nav__link--active[for="__toc"]:hover {
+  background: rgba(167, 139, 250, 0.22);
+}
+
 /* ── Paper metadata: make arXiv/code links stand out ── */
 .md-content a[href*="arxiv.org"],
 .md-content a[href*="github.com"],

overrides/main.html

@@ -2,7 +2,14 @@
 
 {% block htmltitle %}
 {% if page and page.is_homepage %}
+  {# Homepage: prefer the SEO-tuned frontmatter title so Google search results
+     read "AI 顶会论文解读 | …" instead of the bland site_name ("📚 AI Paper Notes").
+     Fallback to site_name when no frontmatter title is provided. #}
+  {%- if page.meta and page.meta.title %}
+  <title>{{ page.meta.title }}</title>
+  {%- else %}
   <title>{{ config.site_name }}</title>
+  {%- endif %}
 {% else %}
   {{ super() }}
 {% endif %}