<p>a {<br /> position: relative;<br /> display: inline-block;<br /> outline: none;<br /> text-decoration: none;<br /> color: #000;<br /> font-size: 32px;<br /> padding: 5px 10px;<br /> cursor:hand;<br /> } <p>a:hover::before, a:hover::after { position: absolute; }<br /> a:hover::before { content: "\5B"; left: -20px; }<br /> a:hover::after { content: "\5D"; right: -20px; }<br /> 悬浮出现双括号演示 点我
