数字图标

数字图标.badge，可以通过背景颜色改变颜色.bg_blue

    <span class="badge bg_blue">5</span>
    <span class="badge bg_green">5</span>
    <span class="badge bg_orange">5</span>
    <span class="badge bg_teal">5</span>
    <span class="badge bg_red">5</span>