版权声明:转载请标明出处 https://blog.csdn.net/qq_41155191/article/details/90297191
css部分
arrow{
width:20px;
height:20px;
border-right:5px solid #c7c7cc;
border-bottom:5px solid #c7c7cc;
transform:translateX(-8px) rotate(-45deg);
}
html部分
<div class="arrow"></div>