技術標籤：css3

<div class="sales-box">
        <div class="sales-hd">
            <h2>熱門活動</h2>
            <a href="#" class="more">獲取更多福利</a>
        </div>
</div>

/* sales-box */

.sales-box {
    border-top: 1px solid #bbb;
    background-color: #fff;
    margin: 4px;
}

.sales-hd {
    position: relative;
    height: 44px;
    border-bottom: 1px solid #ccc;
}

.sales-hd h2 {
    position: relative;
    text-indent: -999px;
    overflow: hidden;
}

.sales-hd h2::after {
    position: absolute;
    top: 5px;
    left: 8px;
    content: "";
    width: 79px;
    height: 15px;
    background: url(../images/hot.png) no-repeat 0 -20px;
    background-size: 79px auto;
}