.flex{display:flex;flex-direction:row;justify-content:flex-start}.box{width:100%;height:100%;background:#fff;border:1px solid #666;display:grid;grid-auto-flow:row}.box div.item1{border-bottom:1px solid #666;height:100%;box-sizing:border-box;padding:10px}.box div.item1 .block{margin-right:10px}.box div.item1 .btn{position:relative;display:inline-block;text-align:center;color:#fff;text-decoration:none;width:auto;height:32px;line-height:32px;background:#409eff;border-radius:3px;font-size:12px;vertical-align:middle;padding:0 10px}.box div.item1 .btn input[type=button],.box div.item1 .btn input[type=file]{opacity:0;width:100%;height:100%;border-radius:3px;position:absolute;left:0}.box div.item2,.box div.item3,.box div.item4{height:100%;border-bottom:1px solid #666}