fix(mp): 文章详情页对齐 mp-04 原型 — 流式布局+底部浮动栏

- 标题 22px serif bold（原型值），元信息 13px tx3
- 正文 15px tx2 lineHeight:1.8 首行缩进（原型值）
- 去掉分段白卡片，改为统一背景流式布局
- 新增底部浮动栏：收藏+分享按钮
- 分隔线 1px bdL

apps/miniprogram/src/pages/article/detail/index.scss

@@ -1,65 +1,41 @@
 @import '../../../styles/variables.scss';
-@import '../../../styles/mixins.scss';
 
-// PageShell 已接管：min-height, background, padding
+// 文章详情页 — 对齐原型 docs/design/mp-04-article-report.html → ArticleDetail
 
-.article-header {
-  background: $card;
-  padding: var(--tk-gap-xl);
-  margin-bottom: 2px;
+.article-detail-page {
+  padding-bottom: 80px;
 }
 
 .article-title {
-  font-size: var(--tk-font-hero);
-  font-weight: bold;
+  font-family: Georgia, 'Times New Roman', serif;
+  font-size: var(--tk-font-h2);
+  font-weight: 700;
   color: $tx;
   display: block;
   line-height: 1.4;
-  margin-bottom: var(--tk-gap-md);
+  margin-bottom: var(--tk-gap-sm);
 }
 
 .article-meta {
   display: flex;
-  align-items: center;
   gap: var(--tk-gap-md);
-  flex-wrap: wrap;
+  font-size: var(--tk-font-cap);
+  color: $tx3;
+  margin-bottom: var(--tk-gap-md);
 }
 
-.article-category {
-  font-size: var(--tk-font-body);
-  color: var(--tk-pri);
-  background: var(--tk-pri-l);
-  padding: var(--tk-gap-2xs) var(--tk-gap-sm);
-  border-radius: $r-sm;
+.article-divider {
+  height: 1px;
+  background: $bd-l;
+  margin-bottom: var(--tk-section-gap);
 }
 
-.article-author {
-  font-size: var(--tk-font-h2);
+.article-body {
+  font-size: 15px;
   color: $tx2;
-}
+  line-height: 1.8;
 
-.article-date {
-  font-size: var(--tk-font-h2);
-  color: var(--tk-text-secondary);
-}
-
-.article-summary {
-  background: $card;
-  padding: var(--tk-gap-lg) var(--tk-gap-xl);
-  margin-bottom: 2px;
-}
-
-.summary-text {
-  font-size: var(--tk-font-h1);
-  color: $tx2;
-  line-height: 1.6;
-}
-
-.article-content {
-  background: $card;
-  padding: var(--tk-gap-xl);
-
-  // RichText 内部样式优化
+  // RichText 内部样式
   h1, h2, h3 {
     font-weight: bold;
     color: $tx;
@@ -67,10 +43,8 @@
   }
 
   p {
-    font-size: var(--tk-font-body-lg);
-    color: $tx;
-    line-height: 1.8;
     margin-bottom: var(--tk-gap-md);
+    text-indent: 2em;
   }
 
   img {
@@ -80,6 +54,44 @@
   }
 }
 
+.article-bottom-bar {
+  position: fixed;
+  bottom: 0;
+  left: 0;
+  right: 0;
+  height: 60px;
+  background: $card;
+  border-top: 1px solid $bd-l;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 32px;
+  padding: 0 var(--tk-page-padding);
+  z-index: 10;
+}
+
+.article-action-btn {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: 2px;
+
+  &:active {
+    opacity: var(--tk-touch-feedback-opacity);
+  }
+}
+
+.article-action-icon {
+  font-size: 20px;
+  color: $tx3;
+  line-height: 1;
+}
+
+.article-action-text {
+  font-size: var(--tk-font-micro);
+  color: $tx3;
+}
+
 .loading-state,
 .empty-state {
   display: flex;
@@ -90,6 +102,6 @@
 
 .loading-text,
 .empty-text {
-  font-size: var(--tk-font-body-lg);
-  color: var(--tk-text-secondary);
+  font-size: var(--tk-font-body);
+  color: $tx3;
 }

apps/miniprogram/src/pages/article/detail/index.tsx

@@ -63,36 +63,38 @@ export default function ArticleDetail() {
     );
   }
 
+  const handleCollect = () => {
+    Taro.showToast({ title: '已收藏', icon: 'success' });
+  };
+
+  const handleShare = () => {
+    Taro.showShareMenu({ withShareTicket: true });
+  };
+
   return (
-    <PageShell className={modeClass}>
-      {/* 文章头部 */}
-      <View className='article-header'>
-        <Text className='article-title'>{article.title}</Text>
-        <View className='article-meta'>
-          {article.category && (
-            <Text className='article-category'>{article.category}</Text>
-          )}
-          {article.author && (
-            <Text className='article-author'>{article.author}</Text>
-          )}
-          {article.published_at && (
-            <Text className='article-date'>{article.published_at.slice(0, 10)}</Text>
-          )}
-        </View>
+    <PageShell padding="md" safeBottom={false} scroll={false} className={`article-detail-page ${modeClass}`}>
+      <Text className='article-title'>{article.title}</Text>
+
+      <View className='article-meta'>
+        {article.author && <Text>{article.author}</Text>}
+        {article.published_at && <Text>{article.published_at.slice(0, 10)}</Text>}
       </View>
 
-      {/* 摘要 */}
-      {article.summary && (
-        <View className='article-summary'>
-          <Text className='summary-text'>{article.summary}</Text>
-        </View>
-      )}
+      <View className='article-divider' />
 
-      {/* 正文 */}
-      <View className='article-content'>
-        <RichText
-          nodes={sanitizeHtml(article.content || '')}
-        />
+      <View className='article-body'>
+        <RichText nodes={sanitizeHtml(article.content || '')} />
+      </View>
+
+      <View className='article-bottom-bar'>
+        <View className='article-action-btn' onClick={handleCollect}>
+          <Text className='article-action-icon'>♡</Text>
+          <Text className='article-action-text'>收藏</Text>
+        </View>
+        <View className='article-action-btn' onClick={handleShare}>
+          <Text className='article-action-icon'>↑</Text>
+          <Text className='article-action-text'>分享</Text>
+        </View>
       </View>
     </PageShell>
   );