SOURCE

<div class="box1">
   <img src="https://cdn.maopujingpai.com/history/img/p4/p4_bg.png" alt class="background">
   <img src="https://cdn.maopujingpai.com/history/img/p4/p4_road.png" alt class="road">
   <div class="box2">
        <img src="https://cdn.maopujingpai.com/history/img/p4/p4_chapter1_ac.png" alt class="pd1">
        <div class="box3">
            <img src="https://cdn.maopujingpai.com/history/img/p4/p4_level1_1.png" alt class="nr1">
        </div>
   </div>
</div>

.road{
    position: absolute;
    left: 220px;
    top:150px;
}

.background{
    height: 100%;
    position: absolute;  
    top: 0; 
    left: 0;
}
.pd1{
    position: absolute;
    left: 100px;
    top:150px;

}
.nr1{
    position: absolute;
    left: 500px;
    top:150px; 
}