小编Aus*_*tin的帖子

.div-to-style {
    -webkit-box-shadow: -20px 0px 0px 0px blue;
    -moz-box-shadow: -20px 0px 0px 0px blue;
    box-shadow: -20px 0px 0px 0px blue;
    border-radius: 8px 8px 8px 8px;

    background-color: red;
    width: 200px;
    height: 50px;
    margin-left:40px;
}

<div class="div-to-style">
</div>

<p>
Want the red section to have a straight border on the left
</p>