<html><head><style>h1 { border-bottom-style: inset; border-bottom-color: coral; border-bottom-width: 7px;}div { border-style: solid; border-bottom-style: inset; border-bottom-color: coral; border-bottom-width: 7px;}</style></head><body><h1>带有内嵌底边框的标题</h1><div> 带有内嵌底部边框的 div 元素。</div></body></html>