css3瀑布流頂部不對齊，列斷裂

問題展現

.waterfall{
    padding: .2rem .28rem;
    column-count: 2;   //顯示兩列
    column-gap: normal;  //列間距
}
.waterfall .item{
    width: 3.2rem;
    overflow:hidden;
    box-sizing: border-box;
    break-inside: avoid;   //列裏面的項不折斷
    margin-bottom:.19rem;
}
.waterfall .item-content{
    background:rgba(255,255,255,1);
    border-radius:.08rem;
    box-shadow:0px .04rem .16rem 0 rgba(0, 0, 0, 0.04);
}
.waterfall .item-pic{
    position:relative;
    width:3.20rem;
    overflow: hidden;
}

<div class="waterfall">
    <div class="item" tapmode @click="openDetailWin(item.topicId)" v-for="(item,index) in list" @key="index">
        <div class="item-content">
            <div class="item-pic">
                <img v-if="item.imageUrl1" :src="imgSrc+item.imageUrl1">
                <img v-else src="../../image/error_img.png">
            </div>
            <div class="item-padded">
                <div class="item-title">{{item.topicTitle}}</div>
                <div class="item-desc">{{item.topicContent}}</div>
                <div class="item-small tf-flex tf-flex-between tf-margin-t-10">
                    <span>{{item.commentCount}}評論&nbsp;&nbsp;{{item.likeCount}}贊</span>
                    <span>{{func.time2desc(item.addTime)}}</span>
                </div>
            </div>
        </div>
    </div>
</div>

找了半天，發現是 item 的 margin-bottom 導致的：第一列的最後一個item的margin-bottom跑到第二列第一個item上面了，改成padding-bottom即可，因爲padding屬於內容，只要不折斷，就不會跑到另一列

 轉載地址：http://www.5imoban.net/jiaocheng/CSS3_HTML5/2018/1129/3491.html