panel-trigger"></div></div></header><section class="panel__content"><div class="container"><article class="article" data-shortcut-switcher="inactive"><h1 data-toc="Author"   id="Author.md">关于作者</h1>  <p id="32661474_4486">Overview articles give background information and provide context to a particular subject. Their goal is to explain a concept, not to teach or give instructions.</p><section class="chapter"><h2 id="what-is-product-service-concept" data-toc="what-is-product-service-concept"   >What 