修复按钮拉伸问题：添加 align-self: flex-start

- 为 .solution-link 添加 align-self: flex-start
- 防止按钮在 flex 容器中被拉伸到整行宽度
- 按钮现在保持自身内容宽度

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

css/index.css

@@ -2796,6 +2796,7 @@ html {
   text-decoration: none;
   transition: all 0.3s ease;
   box-shadow: 0 4px 16px rgba(56, 189, 248, 0.3);
+  align-self: flex-start;
 }
 
 .solution-link:hover {