refactor: streamline homepage layout and enhance sidebar functionality

- Removed unused FriendLinkCard import and adjusted sidebar friend links to display a maximum of three.
- Introduced a new popularPreviewLimit constant to limit the number of popular posts displayed.
- Enhanced the sidebar with quick links, popular content, and friend links sections, improving overall navigation.
- Updated the layout to use a grid system for better responsiveness and organization.
- Simplified the popular posts section by removing sorting options and adjusting the display logic.
- Improved accessibility and readability of various components, including command prompts and statistics.

frontend/src/components/seo/SharePanel.astro

@@ -17,6 +17,7 @@ interface Props {
   description?: string;
   stats?: ShareStat[];
   wechatShareQrEnabled?: boolean;
+  variant?: 'default' | 'compact';
 }
 
 const { locale, t } = getI18n(Astro);
@@ -33,7 +34,9 @@ const {
     : '复制链接、摘要或二维码，方便换设备继续看，也方便直接发给别人。',
   stats = [],
   wechatShareQrEnabled = false,
+  variant = 'default',
 } = Astro.props as Props;
+const isCompact = variant === 'compact';
 
 const visibleBadge = badge;
 const visibleTitle = title;
@@ -136,10 +139,13 @@ if (wechatShareQrEnabled) {
 ---
 
 <section
-  class="rounded-[28px] border border-[var(--border-color)] bg-[linear-gradient(135deg,rgba(var(--primary-rgb),0.1),rgba(var(--secondary-rgb),0.04)_46%,rgba(var(--bg-rgb),0.92))] p-5 sm:p-6"
+  class:list={[
+    'border border-[var(--border-color)] bg-[linear-gradient(135deg,rgba(var(--primary-rgb),0.1),rgba(var(--secondary-rgb),0.04)_46%,rgba(var(--bg-rgb),0.92))]',
+    isCompact ? 'rounded-[24px] p-4' : 'rounded-[28px] p-5 sm:p-6',
+  ]}
   data-share-panel-id={panelId}
 >
-  <div class="flex flex-col gap-4 lg:flex-row lg:items-start lg:justify-between">
+  <div class:list={['flex flex-col gap-4', !isCompact && 'lg:flex-row lg:items-start lg:justify-between']}>
     <div class="space-y-3">
       <div class="flex flex-wrap items-center gap-2">
         <span class="inline-flex items-center gap-2 rounded-full border border-[var(--primary)]/20 bg-[var(--primary)]/10 px-3 py-1 text-[11px] font-semibold uppercase tracking-[0.24em] text-[var(--primary)]">
@@ -149,13 +155,17 @@ if (wechatShareQrEnabled) {
       </div>
 
       <div class="space-y-2">
-        <h3 class="text-xl font-semibold text-[var(--title-color)]">{visibleTitle}</h3>
-        <p class="max-w-3xl text-sm leading-7 text-[var(--text-secondary)]">{visibleDescription}</p>
+        <h3 class:list={['font-semibold text-[var(--title-color)]', isCompact ? 'text-lg' : 'text-xl']}>
+          {visibleTitle}
+        </h3>
+        <p class:list={['text-sm text-[var(--text-secondary)]', isCompact ? 'leading-6' : 'max-w-3xl leading-7']}>
+          {visibleDescription}
+        </p>
       </div>
     </div>
 
     {stats.length > 0 ? (
-      <div class="grid gap-3 sm:grid-cols-2 lg:min-w-[16rem]">
+      <div class:list={['grid gap-3 sm:grid-cols-2', !isCompact && 'lg:min-w-[16rem]']}>
         {stats.slice(0, 4).map((item) => (
           <div class="rounded-2xl border border-[var(--border-color)]/75 bg-[var(--terminal-bg)]/76 px-4 py-3">
             <div class="text-[11px] uppercase tracking-[0.18em] text-[var(--text-tertiary)]">{item.label}</div>
@@ -166,9 +176,14 @@ if (wechatShareQrEnabled) {
     ) : null}
   </div>
 
-  <div class="mt-5 rounded-[24px] border border-[var(--border-color)]/70 bg-[var(--terminal-bg)]/86 p-5 shadow-[0_16px_40px_rgba(15,23,42,0.06)]">
+  <div class:list={[
+    'rounded-[24px] border border-[var(--border-color)]/70 bg-[var(--terminal-bg)]/86 shadow-[0_16px_40px_rgba(15,23,42,0.06)]',
+    isCompact ? 'mt-4 p-4' : 'mt-5 p-5',
+  ]}>
     <div class="text-[11px] uppercase tracking-[0.18em] text-[var(--text-tertiary)]">{copy.summaryTitle}</div>
-    <p class="mt-3 text-base leading-8 text-[var(--title-color)]">{safeSummary}</p>
+    <p class:list={['mt-3 text-[var(--title-color)]', isCompact ? 'text-sm leading-7 line-clamp-4' : 'text-base leading-8']}>
+      {safeSummary}
+    </p>
   </div>
 
   <div class="mt-4 flex flex-col gap-3 sm:flex-row sm:flex-wrap sm:items-center">
@@ -217,7 +232,7 @@ if (wechatShareQrEnabled) {
         <p class="text-[11px] font-semibold uppercase tracking-[0.22em] text-[var(--text-tertiary)]">
           {isEnglish ? 'Share channels' : '分享渠道'}
         </p>
-        <p class="text-xs leading-6 text-[var(--text-secondary)]">{visibleDescription}</p>
+        {!isCompact && <p class="text-xs leading-6 text-[var(--text-secondary)]">{visibleDescription}</p>}
       </div>
       <div class="flex flex-wrap gap-2">
         <a

frontend/src/pages/index.astro

@@ -7,7 +7,6 @@ import TerminalWindow from '../components/ui/TerminalWindow.astro';
 import CommandPrompt from '../components/ui/CommandPrompt.astro';
 import FilterPill from '../components/ui/FilterPill.astro';
 import PostCard from '../components/PostCard.astro';
-import FriendLinkCard from '../components/FriendLinkCard.astro';
 import ViewMoreLink from '../components/ui/ViewMoreLink.astro';
 import StatsList from '../components/StatsList.astro';
 import TechStackList from '../components/TechStackList.astro';
@@ -28,6 +27,7 @@ const selectedCategory = url.searchParams.get('category') || '';
 const normalizedSelectedTag = selectedTag.trim().toLowerCase();
 const normalizedSelectedCategory = selectedCategory.trim().toLowerCase();
 const previewLimit = 5;
+const popularPreviewLimit = 4;
 const DEFAULT_HOME_RANGE_KEY = '7d';
 
 let siteSettings = DEFAULT_SITE_SETTINGS;
@@ -166,6 +166,18 @@ const popularRangeOptions = contentRanges.map((range) => ({
 const initialPopularCount = popularRangeCards.filter(
   ({ rangeKey, post }) => rangeKey === activeContentRange.key && matchesSelectedFilters(post),
 ).length;
+const initialPopularVisibleKeys = new Set(
+  popularRangeCards
+    .filter(({ rangeKey, post }) => rangeKey === activeContentRange.key && matchesSelectedFilters(post))
+    .sort((left, right) => {
+      const scoreDiff = right.item.pageViews - left.item.pageViews;
+      if (scoreDiff !== 0) return scoreDiff;
+      return right.item.readCompletes - left.item.readCompletes;
+    })
+    .slice(0, popularPreviewLimit)
+    .map(({ rangeKey, post }) => `${rangeKey}:${post.slug}`),
+);
+const sidebarFriendLinks = friendLinks.slice(0, 3);
 const buildHomeUrl = ({
   type = selectedType,
   tag = selectedTag,
@@ -210,11 +222,6 @@ const postsPrompt = hasActiveFilters
   ? t('home.promptPostsFiltered', { count: previewCount, filters: activeFilterLabels.join(' · ') })
   : t('home.promptPostsDefault', { count: previewCount });
 const popularPrompt = t('home.promptPopularRange', { label: activeContentRange.label });
-const popularSortOptions = [
-  { id: 'views', label: t('home.sortByViews'), icon: 'fa-eye' },
-  { id: 'completes', label: t('home.sortByCompletes'), icon: 'fa-check-double' },
-  { id: 'depth', label: t('home.sortByDepth'), icon: 'fa-chart-line' },
-];
 const navLinks = [
   { icon: 'fa-file-code', text: t('nav.articles'), href: '/articles' },
   { icon: 'fa-folder', text: t('nav.categories'), href: '/categories' },
@@ -254,6 +261,29 @@ const homeShareCopy = isEnglish
       title: '分享首页',
       description: '把首页发给别人，能快速看到文章、分类、评测和个人介绍等主要内容。',
     };
+const homeSidebarCopy = isEnglish
+  ? {
+      quickLinks: 'Quick links',
+      quickLinksDesc: 'Jump to the main sections of the site.',
+      popularTitle: 'Hot now',
+      popularDesc: 'Track the most-read content in the selected window.',
+      friendsTitle: 'Friend links',
+      friendsDesc: 'A few recommended sites from the blogroll.',
+      statsTitle: 'Site stats',
+      statsDesc: 'A compact snapshot of current site scale.',
+      aiBriefTitle: 'AI site brief',
+    }
+  : {
+      quickLinks: '快速入口',
+      quickLinksDesc: '把常用入口收进侧栏，首页阅读流更清爽。',
+      popularTitle: '最近热门',
+      popularDesc: '按当前时间窗口查看最受关注的内容。',
+      friendsTitle: '友情链接',
+      friendsDesc: '先看几个常访问的站点入口。',
+      statsTitle: '站点概览',
+      statsDesc: '快速看一下当前站点规模与内容状态。',
+      aiBriefTitle: '站点摘要',
+    };
 const homeBriefHighlights = buildDiscoveryHighlights([
   siteSettings.siteDescription,
   siteSettings.heroSubtitle,
@@ -287,7 +317,7 @@ const homeFaqJsonLd = buildFaqJsonLd(homeFaqs);
   jsonLd={[...homeJsonLd, homeFaqJsonLd].filter(Boolean)}
 >
   <PageViewTracker pageType="home" entityId="homepage" />
-  <div class="max-w-5xl mx-auto px-4 sm:px-6 lg:px-8 py-6">
+  <div class="mx-auto max-w-[1480px] px-4 py-6 sm:px-6 lg:px-8">
     <TerminalWindow title={terminalConfig.title} class="w-full">
       <div class="mb-5 px-4 overflow-x-auto">
         <pre class="font-mono text-xs sm:text-sm text-[var(--primary)] whitespace-pre">{terminalConfig.asciiArt}</pre>
@@ -321,39 +351,6 @@ const homeFaqJsonLd = buildFaqJsonLd(homeFaqs);
           </div>
         </div>
 
-        <div class="ml-4 mt-4 home-nav-strip">
-          {navLinks.map(link => (
-            <a href={link.href} class="home-nav-pill">
-              <i class={`fas ${link.icon} text-[11px]`}></i>
-              <span class="min-w-0 truncate">{link.text}</span>
-            </a>
-          ))}
-        </div>
-
-        <div class="ml-4 mt-4">
-          <SharePanel
-            shareTitle={siteSettings.siteTitle}
-            summary={siteSettings.heroSubtitle || siteSettings.siteDescription}
-            canonicalUrl={siteBaseUrl}
-            badge={homeShareCopy.badge}
-            kicker="geo / homepage"
-            title={homeShareCopy.title}
-            description={homeShareCopy.description}
-            stats={systemStats.slice(0, 4)}
-            wechatShareQrEnabled={siteSettings.seo.wechatShareQrEnabled}
-          />
-        </div>
-
-        <div class="ml-4 mt-4">
-          <DiscoveryBrief
-            badge={isEnglish ? 'site brief' : '站点摘要'}
-            kicker="geo / overview"
-            title={isEnglish ? 'AI-readable site brief' : '给 AI 看的站点摘要'}
-            summary={siteSettings.heroSubtitle || siteSettings.siteDescription}
-            highlights={homeBriefHighlights}
-            faqs={homeFaqs}
-          />
-        </div>
       </div>
 
       {apiError && (
@@ -364,7 +361,9 @@ const homeFaqJsonLd = buildFaqJsonLd(homeFaqs);
         </div>
       )}
 
-      <div id="discover" class="mb-6 px-4">
+      <div class="grid gap-6 px-4 xl:grid-cols-[minmax(0,1fr)_320px]">
+        <div class="min-w-0 space-y-6">
+          <div id="discover">
             <CommandPrompt promptId="home-discover-prompt" command={discoverPrompt} />
             <div class="ml-4 terminal-panel home-discovery-shell">
               <div class="home-discovery-head">
@@ -495,20 +494,20 @@ const homeFaqJsonLd = buildFaqJsonLd(homeFaqs);
           </div>
 
           {pinnedPost && (
-        <div class="mb-6 px-4">
+            <div>
               <CommandPrompt command={t('home.promptPinned')} />
               <div id="home-pinned-wrap" class:list={['ml-4', !initialPinnedVisible && 'hidden']}>
                 <div class="terminal-panel terminal-panel-accent terminal-interactive-card p-4" style={getAccentVars(getPostTypeTheme(pinnedPost.type))}>
-              <div class="flex items-center gap-2 mb-2">
-                <span class="px-2 py-0.5 text-xs rounded bg-[var(--primary)] text-[var(--terminal-bg)] font-bold">{t('home.pinned')}</span>
-                <span class="terminal-chip terminal-chip--accent text-[10px] py-1 px-2" style={getAccentVars(getPostTypeTheme(pinnedPost.type))}>
+                  <div class="mb-2 flex items-center gap-2">
+                    <span class="rounded bg-[var(--primary)] px-2 py-0.5 text-xs font-bold text-[var(--terminal-bg)]">{t('home.pinned')}</span>
+                    <span class="terminal-chip terminal-chip--accent px-2 py-1 text-[10px]" style={getAccentVars(getPostTypeTheme(pinnedPost.type))}>
                       {pinnedPost.type === 'article' ? t('common.article') : t('common.tweet')}
                     </span>
                     <a href={`/articles/${pinnedPost.slug}`} class="text-lg font-bold text-[var(--title-color)] transition hover:text-[var(--primary)]">
                       {pinnedPost.title}
                     </a>
                   </div>
-              <p class="text-sm text-[var(--text-secondary)] mb-2">{pinnedPost.date} | {t('common.readTime')}: {formatReadTime(locale, pinnedPost.readTime, t)}</p>
+                  <p class="mb-2 text-sm text-[var(--text-secondary)]">{pinnedPost.date} | {t('common.readTime')}: {formatReadTime(locale, pinnedPost.readTime, t)}</p>
                   <p class="text-[var(--text-secondary)]">{pinnedPost.description}</p>
                   <div class="mt-4">
                     <a href={`/articles/${pinnedPost.slug}`} class="terminal-action-button inline-flex">
@@ -521,7 +520,7 @@ const homeFaqJsonLd = buildFaqJsonLd(homeFaqs);
             </div>
           )}
 
-      <div id="posts" class="mb-10 px-4">
+          <div id="posts">
             <CommandPrompt promptId="home-posts-prompt" command={postsPrompt} />
             <div class="ml-4">
               {allPosts.length > 0 ? (
@@ -585,22 +584,49 @@ const homeFaqJsonLd = buildFaqJsonLd(homeFaqs);
               </div>
             </div>
           </div>
+        </div>
 
-      <div id="popular" class="mb-10 px-4">
-        <CommandPrompt promptId="home-popular-prompt" command={popularPrompt} />
-        <div class="ml-4 grid gap-6 lg:grid-cols-[1.05fr_0.95fr]">
+        <aside class="space-y-4 xl:sticky xl:top-24 xl:self-start">
           <section class="terminal-panel space-y-4">
-            <div class="flex flex-wrap items-start justify-between gap-3">
+            <div class="space-y-1">
+              <h3 class="text-lg font-semibold text-[var(--title-color)]">{homeSidebarCopy.quickLinks}</h3>
+              <p class="text-sm leading-6 text-[var(--text-secondary)]">{homeSidebarCopy.quickLinksDesc}</p>
+            </div>
+            <div class="grid gap-2 sm:grid-cols-2 xl:grid-cols-2">
+              {navLinks.map(link => (
+                <a
+                  href={link.href}
+                  class="group flex min-w-0 items-center gap-2 rounded-2xl border border-[var(--border-color)] bg-[var(--terminal-bg)]/75 px-3 py-3 text-sm text-[var(--title-color)] transition hover:-translate-y-0.5 hover:border-[var(--primary)] hover:text-[var(--primary)]"
+                >
+                  <span class="flex h-8 w-8 shrink-0 items-center justify-center rounded-xl bg-[var(--primary)]/10 text-[var(--primary)]">
+                    <i class={`fas ${link.icon} text-[11px]`}></i>
+                  </span>
+                  <span class="min-w-0 truncate font-medium">{link.text}</span>
+                </a>
+              ))}
+            </div>
+          </section>
+
+          <SharePanel
+            shareTitle={siteSettings.siteTitle}
+            summary={siteSettings.heroSubtitle || siteSettings.siteDescription}
+            canonicalUrl={siteBaseUrl}
+            badge={homeShareCopy.badge}
+            title={homeShareCopy.title}
+            description={homeShareCopy.description}
+            wechatShareQrEnabled={siteSettings.seo.wechatShareQrEnabled}
+            variant="compact"
+          />
+
+          <section class="terminal-panel space-y-4">
+            <div class="flex items-start justify-between gap-3">
               <div>
-                <h3 class="text-lg font-bold text-[var(--title-color)]">{t('home.hotNow')}</h3>
-                <p class="mt-2 text-sm leading-6 text-[var(--text-secondary)]">
-                  {t('home.hotNowDescription')}
-                </p>
+                <h3 class="text-lg font-semibold text-[var(--title-color)]">{homeSidebarCopy.popularTitle}</h3>
+                <p class="mt-1 text-sm leading-6 text-[var(--text-secondary)]">{homeSidebarCopy.popularDesc}</p>
               </div>
               <span id="home-popular-count" class="terminal-stat-pill">{initialPopularCount}</span>
             </div>
 
-            <div class="flex flex-wrap items-center justify-between gap-3">
             <div class="home-popular-sortbar">
               {popularRangeOptions.map((option) => (
                 <button
@@ -617,26 +643,8 @@ const homeFaqJsonLd = buildFaqJsonLd(homeFaqs);
               ))}
             </div>
 
-              <div class="home-popular-sortbar">
-                {popularSortOptions.map((option) => (
-                  <button
-                    type="button"
-                    data-home-popular-sort={option.id}
-                    class:list={[
-                      'home-popular-sort',
-                      option.id === 'views' && 'is-active'
-                    ]}
-                  >
-                    <i class={`fas ${option.icon} text-[10px]`}></i>
-                    <span>{option.label}</span>
-                  </button>
-                ))}
-              </div>
-            </div>
-
             <div id="home-popular-list" class="space-y-3">
-              {popularRangeCards.map(({ rangeKey, item, post }) => {
-                return (
+              {popularRangeCards.map(({ rangeKey, item, post }) => (
                 <a
                   href={`/articles/${post.slug}`}
                   data-home-popular-card
@@ -649,112 +657,135 @@ const homeFaqJsonLd = buildFaqJsonLd(homeFaqs);
                   data-home-popular-completes={item.readCompletes}
                   data-home-popular-depth={Math.round(item.avgProgressPercent)}
                   class:list={[
-                      'block rounded-2xl border border-[var(--border-color)] bg-[var(--terminal-bg)]/70 p-4 transition hover:border-[var(--primary)] hover:-translate-y-0.5',
-                      rangeKey !== activeContentRange.key && 'hidden'
+                    'block rounded-2xl border border-[var(--border-color)] bg-[var(--terminal-bg)]/72 p-3 transition hover:-translate-y-0.5 hover:border-[var(--primary)]',
+                    !initialPopularVisibleKeys.has(`${rangeKey}:${post.slug}`) && 'hidden'
                   ]}
                   style={getAccentVars(getPostTypeTheme(post.type))}
                 >
-                    <div class="flex flex-wrap items-start justify-between gap-3">
+                  <div class="flex items-start gap-3">
+                    <span class="mt-0.5 inline-flex h-7 w-7 shrink-0 items-center justify-center rounded-full bg-[var(--primary)]/10 text-[11px] font-semibold text-[var(--primary)]">
+                      {item.pageViews}
+                    </span>
                     <div class="min-w-0 flex-1">
                       <div class="flex flex-wrap items-center gap-2">
-                          <span class="terminal-chip terminal-chip--accent text-[10px] py-1 px-2" style={getAccentVars(getPostTypeTheme(post.type))}>
+                        <span class="terminal-chip terminal-chip--accent px-2 py-1 text-[10px]" style={getAccentVars(getPostTypeTheme(post.type))}>
                           {post.type === 'article' ? t('common.article') : t('common.tweet')}
                         </span>
-                          <span class="terminal-chip terminal-chip--accent text-[10px] py-1 px-2" style={getAccentVars(getCategoryTheme(post.category))}>
+                        <span class="terminal-chip terminal-chip--accent px-2 py-1 text-[10px]" style={getAccentVars(getCategoryTheme(post.category))}>
                           {post.category}
                         </span>
                       </div>
-                        <h4 class="mt-3 text-base font-semibold text-[var(--title-color)]">{post.title}</h4>
-                        <p class="mt-2 line-clamp-2 text-sm leading-6 text-[var(--text-secondary)]">
-                          {post.description}
-                        </p>
-                      </div>
-                      <div class="space-y-2 text-right text-xs text-[var(--text-tertiary)]">
-                        <div>{post.date}</div>
-                        <div>{t('common.readTime')}: {formatReadTime(locale, post.readTime, t)}</div>
-                      </div>
-                    </div>
-
-                    <div class="mt-4 flex flex-wrap gap-2">
-                      <span class="terminal-stat-pill">
-                        <i class="fas fa-eye text-[10px] text-[var(--primary)]"></i>
+                      <h4 class="mt-2 line-clamp-2 text-sm font-semibold leading-6 text-[var(--title-color)]">{post.title}</h4>
+                      <div class="mt-2 flex flex-wrap gap-2 text-xs text-[var(--text-secondary)]">
                         <span>{t('home.views')}: {item.pageViews}</span>
-                      </span>
-                      <span class="terminal-stat-pill">
-                        <i class="fas fa-check-double text-[10px] text-[var(--primary)]"></i>
                         <span>{t('home.completes')}: {item.readCompletes}</span>
-                      </span>
-                      <span class="terminal-stat-pill">
-                        <i class="fas fa-chart-line text-[10px] text-[var(--primary)]"></i>
                         <span>{t('home.avgProgress')}: {formatProgressPercent(item.avgProgressPercent)}</span>
-                      </span>
-                      <span class="terminal-stat-pill">
-                        <i class="fas fa-stopwatch text-[10px] text-[var(--primary)]"></i>
-                        <span>{t('home.avgDuration')}: {formatDurationMs(item.avgDurationMs)}</span>
-                      </span>
+                      </div>
+                    </div>
                   </div>
                 </a>
-                );
-              })}
+              ))}
             </div>
 
-            <div id="home-popular-empty" class:list={['terminal-empty', initialPopularCount > 0 && 'hidden']}>
+            <div id="home-popular-empty" class:list={['terminal-empty py-6', initialPopularCount > 0 && 'hidden']}>
               <p class="text-sm leading-6 text-[var(--text-secondary)]">{t('home.hotNowEmpty')}</p>
             </div>
           </section>
 
           <section class="terminal-panel space-y-4">
-            <div class="flex flex-wrap items-start justify-between gap-3">
+            <div class="flex items-start justify-between gap-3">
               <div>
-                <h3 class="text-lg font-bold text-[var(--title-color)]">{t('home.readingSignals')}</h3>
-                <p class="mt-2 text-sm leading-6 text-[var(--text-secondary)]">
-                  {t('home.readingSignalsDescription')}
-                </p>
+                <h3 class="text-lg font-semibold text-[var(--title-color)]">{homeSidebarCopy.statsTitle}</h3>
+                <p class="mt-1 text-sm leading-6 text-[var(--text-secondary)]">{homeSidebarCopy.statsDesc}</p>
               </div>
               <span id="home-stats-window-pill" class="terminal-stat-pill">{activeContentRange.label}</span>
             </div>
 
-            <div class="grid gap-3 sm:grid-cols-2">
+            <div class="grid gap-3 sm:grid-cols-2 xl:grid-cols-2">
               <div class="rounded-2xl border border-[var(--border-color)] bg-[var(--bg)]/70 p-4">
                 <p class="text-xs uppercase tracking-[0.18em] text-[var(--text-tertiary)]">{t('home.views')}</p>
-                <p id="home-reading-views-value" class="mt-3 text-3xl font-semibold text-[var(--title-color)]">{activeContentRange.overview.pageViews}</p>
+                <p id="home-reading-views-value" class="mt-3 text-2xl font-semibold text-[var(--title-color)]">{activeContentRange.overview.pageViews}</p>
                 <p class="mt-2 text-xs text-[var(--text-secondary)]">{t('home.totalViews')}: {contentOverview.totalPageViews}</p>
               </div>
               <div class="rounded-2xl border border-[var(--border-color)] bg-[var(--bg)]/70 p-4">
                 <p class="text-xs uppercase tracking-[0.18em] text-[var(--text-tertiary)]">{t('home.completes')}</p>
-                <p id="home-reading-completes-value" class="mt-3 text-3xl font-semibold text-[var(--title-color)]">{activeContentRange.overview.readCompletes}</p>
+                <p id="home-reading-completes-value" class="mt-3 text-2xl font-semibold text-[var(--title-color)]">{activeContentRange.overview.readCompletes}</p>
                 <p class="mt-2 text-xs text-[var(--text-secondary)]">{t('home.totalCompletes')}: {contentOverview.totalReadCompletes}</p>
               </div>
               <div class="rounded-2xl border border-[var(--border-color)] bg-[var(--bg)]/70 p-4">
                 <p class="text-xs uppercase tracking-[0.18em] text-[var(--text-tertiary)]">{t('home.avgProgress')}</p>
-                <p id="home-reading-progress-value" class="mt-3 text-3xl font-semibold text-[var(--title-color)]">{formatProgressPercent(activeContentRange.overview.avgReadProgress)}</p>
+                <p id="home-reading-progress-value" class="mt-3 text-2xl font-semibold text-[var(--title-color)]">{formatProgressPercent(activeContentRange.overview.avgReadProgress)}</p>
                 <p id="home-reading-window-meta" class="mt-2 text-xs text-[var(--text-secondary)]">{t('home.statsWindowLabel', { label: activeContentRange.label })}</p>
               </div>
               <div class="rounded-2xl border border-[var(--border-color)] bg-[var(--bg)]/70 p-4">
                 <p class="text-xs uppercase tracking-[0.18em] text-[var(--text-tertiary)]">{t('home.avgDuration')}</p>
-                <p id="home-reading-duration-value" class="mt-3 text-3xl font-semibold text-[var(--title-color)]">{formatDurationMs(activeContentRange.overview.avgReadDurationMs)}</p>
-                <p class="mt-2 text-xs text-[var(--text-secondary)]">{t('home.totalViews')}: {contentOverview.totalPageViews}</p>
-              </div>
-            </div>
-          </section>
+                <p id="home-reading-duration-value" class="mt-3 text-2xl font-semibold text-[var(--title-color)]">{formatDurationMs(activeContentRange.overview.avgReadDurationMs)}</p>
+                <p class="mt-2 text-xs text-[var(--text-secondary)]">{t('common.posts')}: {allPosts.length}</p>
               </div>
             </div>
 
-      <div class="border-t border-[var(--border-color)] my-8"></div>
-
-      <div id="friends" class="mb-8 px-4">
-        <CommandPrompt command={t('home.promptFriends')} />
-        <div class="ml-4 grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 gap-4">
-          {friendLinks.map(friend => (
-            <FriendLinkCard friend={friend} />
+            <div class="grid gap-3 sm:grid-cols-2">
+              {systemStats.slice(0, 4).map((item) => (
+                <div class="rounded-2xl border border-[var(--border-color)]/75 bg-[var(--terminal-bg)]/78 px-4 py-3">
+                  <div class="text-[11px] uppercase tracking-[0.18em] text-[var(--text-tertiary)]">{item.label}</div>
+                  <div class="mt-2 text-lg font-semibold text-[var(--title-color)]">{item.value}</div>
+                </div>
               ))}
             </div>
-        <div class="mt-6 ml-4">
-          <ViewMoreLink href="/friends" text={t('common.viewAllLinks')} command="cd ~/friends" />
-        </div>
+          </section>
+
+          {sidebarFriendLinks.length > 0 && (
+            <section class="terminal-panel space-y-4">
+              <div class="space-y-1">
+                <h3 class="text-lg font-semibold text-[var(--title-color)]">{homeSidebarCopy.friendsTitle}</h3>
+                <p class="text-sm leading-6 text-[var(--text-secondary)]">{homeSidebarCopy.friendsDesc}</p>
               </div>
 
-      <div class="border-t border-[var(--border-color)] my-8"></div>
+              <div class="space-y-3">
+                {sidebarFriendLinks.map((friend) => (
+                  <a
+                    href={friend.url}
+                    target="_blank"
+                    rel="noopener noreferrer"
+                    class="group flex items-start gap-3 rounded-2xl border border-[var(--border-color)] bg-[var(--terminal-bg)]/75 p-3 transition hover:-translate-y-0.5 hover:border-[var(--primary)]"
+                  >
+                    {friend.avatar ? (
+                      <img
+                        src={friend.avatar}
+                        alt={friend.name}
+                        class="h-10 w-10 shrink-0 rounded-xl border border-[var(--border-color)] object-cover bg-[var(--code-bg)]"
+                        loading="lazy"
+                        decoding="async"
+                      />
+                    ) : (
+                      <span class="flex h-10 w-10 shrink-0 items-center justify-center rounded-xl border border-[var(--border-color)] bg-[var(--code-bg)] text-sm font-bold text-[var(--primary)]">
+                        {friend.name.charAt(0).toUpperCase()}
+                      </span>
+                    )}
+                    <div class="min-w-0 flex-1">
+                      <div class="flex items-center gap-2">
+                        <span class="truncate text-sm font-semibold text-[var(--title-color)] group-hover:text-[var(--primary)]">
+                          {friend.name}
+                        </span>
+                        <i class="fas fa-arrow-up-right-from-square text-[10px] text-[var(--text-tertiary)] opacity-0 transition-opacity group-hover:opacity-100"></i>
+                      </div>
+                      {friend.description && (
+                        <p class="mt-1 line-clamp-2 text-xs leading-6 text-[var(--text-secondary)]">
+                          {friend.description}
+                        </p>
+                      )}
+                    </div>
+                  </a>
+                ))}
+              </div>
+
+              <ViewMoreLink href="/friends" text={t('common.viewAllLinks')} command="cd ~/friends" />
+            </section>
+          )}
+        </aside>
+      </div>
+
+      <div class="my-8 border-t border-[var(--border-color)]"></div>
 
       <div id="about" class="px-4">
         <CommandPrompt command={t('home.promptAbout')} />
@@ -775,6 +806,21 @@ const homeFaqJsonLd = buildFaqJsonLd(homeFaqs);
           </div>
         </div>
       </div>
+
+      <div class="my-8 border-t border-[var(--border-color)]"></div>
+
+      <div class="px-4 pb-2">
+        <div class="ml-4">
+          <DiscoveryBrief
+            badge={isEnglish ? 'site brief' : homeSidebarCopy.aiBriefTitle}
+            kicker="geo / overview"
+            title={isEnglish ? 'AI-readable site brief' : '给 AI 看的站点摘要'}
+            summary={siteSettings.heroSubtitle || siteSettings.siteDescription}
+            highlights={homeBriefHighlights}
+            faqs={homeFaqs}
+          />
+        </div>
+      </div>
     </TerminalWindow>
   </div>
 </BaseLayout>
@@ -783,6 +829,7 @@ const homeFaqJsonLd = buildFaqJsonLd(homeFaqs);
   is:inline
   define:vars={{
     previewLimit,
+    popularPreviewLimit,
     categoryAccentMap,
     tagAccentMap,
     contentRangesPayload: contentRanges.map((range) => ({
@@ -1097,7 +1144,7 @@ const homeFaqJsonLd = buildFaqJsonLd(homeFaqs);
       });
       const sortedPopular = sortPopularCards(filteredPopular);
       popularCards.forEach((card) => card.classList.add('hidden'));
-      sortedPopular.forEach((card) => {
+      sortedPopular.slice(0, popularPreviewLimit).forEach((card) => {
         card.classList.remove('hidden');
         popularList?.appendChild(card);
       });