字体、字号设置完毕

app/assets/css/main.css

@@ -18,3 +18,108 @@
   --color-green-900: #0A5331;
   --color-green-950: #052E16;
 }
+
+/* 主题字体样式 */
+.font-sans-serif {
+  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
+}
+
+.font-serif {
+  font-family: ui-serif, Georgia, Cambria, "Times New Roman", Times, serif;
+}
+
+.font-monospace {
+  font-family: ui-monospace, SFMono-Regular, "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;
+}
+
+/* 字号样式 - 针对文档页面 */
+.text-xs {
+  font-size: 0.75rem;
+  line-height: 1rem;
+}
+
+.text-xs .prose {
+  font-size: 0.75rem;
+  line-height: 1rem;
+}
+
+.text-sm {
+  font-size: 0.875rem;
+  line-height: 1.25rem;
+}
+
+.text-sm .prose {
+  font-size: 0.875rem;
+  line-height: 1.25rem;
+}
+
+.text-base {
+  font-size: 1rem;
+  line-height: 1.5rem;
+}
+
+.text-base .prose {
+  font-size: 1rem;
+  line-height: 1.5rem;
+}
+
+.text-lg {
+  font-size: 1.125rem;
+  line-height: 1.75rem;
+}
+
+.text-lg .prose {
+  font-size: 1.125rem;
+  line-height: 1.75rem;
+}
+
+.text-xl {
+  font-size: 1.25rem;
+  line-height: 1.75rem;
+}
+
+.text-xl .prose {
+  font-size: 1.25rem;
+  line-height: 1.75rem;
+}
+
+/* 主题样式 */
+.theme-classic {
+  /* 经典主题样式 */
+  --theme-background: #ffffff;
+  --theme-text: #1f2937;
+  --theme-border: #e5e7eb;
+}
+
+.theme-elegant {
+  /* 优雅主题样式 */
+  --theme-background: #fafafa;
+  --theme-text: #374151;
+  --theme-border: #d1d5db;
+}
+
+.theme-minimal {
+  /* 简洁主题样式 */
+  --theme-background: #ffffff;
+  --theme-text: #111827;
+  --theme-border: #f3f4f6;
+}
+
+/* 深色模式支持 */
+.dark .theme-classic {
+  --theme-background: #1f2937;
+  --theme-text: #f9fafb;
+  --theme-border: #374151;
+}
+
+.dark .theme-elegant {
+  --theme-background: #111827;
+  --theme-text: #f3f4f6;
+  --theme-border: #4b5563;
+}
+
+.dark .theme-minimal {
+  --theme-background: #000000;
+  --theme-text: #ffffff;
+  --theme-border: #1f2937;
+}