<html><head><style>h1 { border-style: outset; border-width: 7px; border-color: coral;}div { border-style: outset; border-width: 7px; border-color: coral; }</style></head><body><h1>带有外边框的标题</h1><div> 带有外边框的 div 元素。</div></body></html>