<html><head><style>h1 { border-top-style: outset; border-top-color: coral; border-top-width: 7px;}div { border-style: solid; border-top-style: outset; border-top-color: coral; border-top-width: 7px;}</style></head><body><h1>带有顶部外边框的标题</h1><div> 一个带有外边框的 div 元素。</div></body></html>