父元素的div宽度覆盖子元素的宽度

问题遇到的现象和发生背景

父元素的div宽度覆盖了子元素的宽度

用代码块功能插入代码，请勿粘贴截图

<div class="propa">
 <div class="container">
        <div>1div>
        <div>
            <div class="swiper-text">
                <div class="swiper-wrap">div>
                <div class="swiper">
                    <div class="swiper-img-d"><img src="@/common/image/123.png">div>
                    <div class="swiper-img"><img src="@/common/image/周杰伦_我是如此相信_4.jpg">div>
                    <div class="swiper-img"><img src="@/common/image/彩珠.jpg">div>
                    <div class="swiper-img"><img src="@/common/image/大家.jpg">div>
                div>
            div>
        div>
        <div>3div>
        <div>4div>
    div>
 div>

 .propa{
        margin:0;
        padding: 0;
        overflow-x:hidden ;
    }
.container{
        width: 100vw;
        height: 100vh;
        scroll-snap-type: y mandatory;
        overflow-y: scroll;
        overflow-x: hidden;
    }
    .container div{
        width: 100vw;
        height: 100vh;
        display: flex;
        justify-content: center;
        align-items: center;
        background-color: gold;
        color:#fff;
        scroll-snap-align: start;
    }
    .swiper-text{
        position: relative;
        width: 1vh;
        display: flex;
        justify-content: space-evenly;
        z-index:99;
    }
    .swiper-wrap{
        width: 25rem;
        height: 31rem;
        transition: .4s;
        background-size: cover;
    }
    .swiper{
        width: 3rem;
        height: 7.5rem;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
    }
    .swiper-img{
        position:relative;
        width:3rem;
        height:1rem;
        right:0;
        transition: 0.1rem;
        overflow: hidden;
    }
    .swiper-img .img{
        position: absolute;
        width: 3rem;
        transform: translate(0,-0.5rem);
        transition: .5s;
        right: 0;
    }
    .swiper-img-d{
        opacity: 0;
        right: 3.8rem;
    }
    .swiper-img:hover img{
        opacity: 0;
        right: 7.8rem;
    }

运行结果及报错内容

你的子元素也是div，所以会被.container div匹配到，而且.container div这个选择器的等级比你类.swiper-text要高，所以会优先使用.container div中的属性

解决思路是：.container div这里不要使用div，是哪个div你直接给它个id或class，然后这里的div换成对应的id或class