Do arrow icon with css

Copyright notice: reproduced please indicate the source https://blog.csdn.net/qq_41155191/article/details/90297191

css section

arrow{
    width:20px;
    height:20px;
    border-right:5px solid #c7c7cc;
    border-bottom:5px solid #c7c7cc;
    transform:translateX(-8px) rotate(-45deg);
}
    

html part

<div class="arrow"></div>