style: modify alert style. #258

Author: jaywcjlove

core/src/styles/markdown.less

@@ -214,7 +214,8 @@ body[data-color-mode*='light'] {
 
 .wmde-markdown {
   -webkit-text-size-adjust: 100%;
-  font-family: -apple-system, 'Segoe UI', Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji';
+  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif,
+    'Apple Color Emoji', 'Segoe UI Emoji';
   font-size: 16px;
   line-height: 1.5;
   word-wrap: break-word;
@@ -1080,8 +1081,7 @@ body[data-color-mode*='light'] {
       display: flex;
       align-items: center;
       line-height: 1;
-      font-weight: 600;
-      font-family: initial;
+      font-weight: 500;
       font-size: 14px;
       svg.octicon {
         margin-right: var(--base-size-8, 8px) !important;