[CSSチュートリアル】QQtabBarからCSS命名規則BEMの詳細を見る

<div class="qqui-appBar">
        <a href="#" class="qqui-appBar__item qqui-appBar__item_on">
            <span>
                <i class="iconfont icon-icon-test1 icon_on"></i>
                <span class="qqui__pointer qqui__pointer_on">1</span>
            </span>
            <p class="qqui__desc qqui__desc_on">message</p>
        </a>
        <a href="#" class="qqui-appBar__item">
            <span>
                <i class="iconfont icon-icon-test2"></i>
                <span class="qqui__pointer"></span>
            </span>
            <p class="qqui__desc">contact</p>
        </a>
        <a href="#" class="qqui-appBar__item">
            <span>
                <i class="iconfont icon-icon-test"></i>
                <span class="qqui__pointer"></span>
            </span>
            
            <p class="qqui__desc">watch</p>
        </a>
        <a href="#" class="qqui-appBar__item">
            <span>
                <i class="iconfont icon-icon-test3"></i>
                <span class="qqui__pointer qqui__pointer_oOn"></span>
            </span>
            
            <p class="qqui__desc">dynamic</p>
        </a>
    </div>

* {
            padding: 0;
            margin: 0;
        }

        a:link {
            color: #b0b3bf;
        }

        a:vistied {
            color: #b0b3bf;
        }

        a:hover {
            color: #2ec4fc;
        }

        a:active {
            color: #2ec4fc;
        }
        a i.iconfont {
            display: inline-block;
           
            width: 36px;
            height: 36px;
            overflow: hidden;
            margin-bottom: 3.5px;
            font-size: 36px;
        }
        a i.icon_on{
            color: #2ec4fc;
        }
        

        .qqui-appBar {
            display: flex;
            position: absolute;
            bottom: 0;
            width: 100%;
            z-index: 500;
            background-color: #f9f9f9;
        }

        .qqui-appBar .qqui-appBar__item {
            flex: 1;
            text-align: center;
          
            padding-top: 25px;
            font-size: 0;
            color: #b0b3bf;
            text-decoration: none;
        }
        .qqui-appBar__item>span{
            display: inline-block;
            position: relative;
            margin-bottom: 9px;
        }
        .qqui-appBar .qqui__desc {
            font-size: 18px;
            text-align: center;
            line-height: 18px;
            margin-bottom: 13px;
        }
        .qqui-appBar .qqui__desc_on{
            color: black;
        }

        .qqui-appBar .qqui__pointer{
            position: absolute;
            top: -2px;
            right: -2px;
            width: 20px;
            height:20px;
            display: inline-block;
            line-height: 18px;
            color: white;
            border-radius: 50%;
            font-size: 10px;
        }
        .qqui-appBar .qqui__pointer_on{
            
            background-color: #F43539;
        }
        .qqui-appBar .qqui__pointer_oOn{
            width: 12px;
            height: 12px; 
            line-height: 12px; 
            background-color: #F43539;
         
        }