content: "e600"

w图标生成原理。

<style>
    @font-face {
        font-family: iconfont-sm;
        src: url(//at.alicdn.com/t/font_1433401008_2229297.woff) format('woff'), url(//at.alicdn.com/t/font_1433401008_2229297.ttf) format('truetype'), url(//at.alicdn.com/t/font_1433401008_2229297.svg#iconfont) format('svg')
    }

    .icon {
        font-family: iconfont-sm !important;
        font-style: normal;
        display: inline-block;
        vertical-align: middle;
        background-size: 100% auto;
        background-position: center;
        -webkit-font-smoothing: antialiased;
        -webkit-text-stroke-width: .2px;
        -moz-osx-font-smoothing: grayscale
    }

    .icon-cart:before {
        content: "e600"
    }
</style>

<P class=" icon icon-cart">This is a somewhat long HTML
    paragraph   </P>