<html><head><style>p.ex1 {outline: dashed;}p.ex2 {outline: dotted red;}p.ex3 {outline: 5px solid yellow;}p.ex4 {outline: thick ridge pink;}</style></head><body><h2>outline 属性</h2><p class="ex1">虚线轮廓。</p><p class="ex2">红色虚线轮廓。</p><p class="ex3">5 像素纯黄色轮廓。</p><p class="ex4">厚实的粉红色脊线轮廓。</p></body></html>