<html><head><style>h1, h2, div { padding: 40px 20px; background-color: lightgreen;}h1 { border-inline: 5px solid red;}h2 { border-inline: 4px dotted blue;}div { border-inline: double;}</style></head><body><h1>标题，行内方向有实线红色边框</h1> <h2>标题，行内方向有点线蓝色边框</h2> <div>一个 div 元素，行内方向有双线边框。</div></body></html>