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```

<style>
    .mystep{
        display: flex;
        box-sizing: border-box;
    }
    .mystep>div{
        width: 150px;
        height: 50px;
        margin-right: 20px;
        /* border: 1px solid #ccc; */
        background: #ccc;
        display: flex;
        align-items: center;
        padding-left: 10px;
        position: relative;
    }
    .mystep>div:nth-child(1){
        padding-left: 10px;
    }
    .mystep>div:nth-child(1)::before{
       display: none;
    }
    .mystep>div{
        padding-left: 30px;
    }
    .mystep>div::before{
        position: absolute;
        z-index: 99;
        content: '';
        left: 0px;
        top: 0;
       width: 0;
       height: 0;
       border-top: 25px solid transparent;
       border-right: 20px solid transparent;
       border-bottom: 25px solid transparent;
       border-left: 20px solid #fff
    }
    .mystep>div::after{
        position: absolute;
        z-index: 99;
        content: '';
        right: -40px;
        top: 0;
       width: 0;
       height: 0;
       border-top: 25px solid transparent;
       border-right: 20px solid transparent;
       border-bottom: 25px solid transparent;
       border-left: 20px solid #ccc
    }
</style>

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