右侧div盒子放上button为什么展示效果不一样

问题遇到的现象和发生背景
用代码块功能插入代码，请勿粘贴截图
我想要达到的结果
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>

    <style>
        *{
            margin: 0px;
            padding: 0px;
        }
        .home{
            float: left;
            font-size: 0px;
        }
        .content{
            display: inline-block;
            width: 100px;
            height: 100px;
            background-color: aquamarine;
        }
        .btn{
            display: inline-block;
            height: 100px;
            width: 50px;
            background-color: blueviolet;
        }
        .btn button{
            height: 50px;
            width: 50px;
            font-size: 20px;
        }
    </style>
</head>
<body>
    <div class="home">
        <div class="content"></div>
        <div class="btn">
            <button class="plus">+</button>
            <button class="sub">-</button>
        </div>
    </div>
</body>
</html>

![img](https://img-mid.csdnimg.cn/release/static/image/mid/ask/630813505366154.png "#left")

img


img

给 .home 加个 display:flex；

要不然就用浮动解决
给 .content加float:left; .btn也加上float:left

你给.btn这个类加多个样式vertical-align: top;