嵌套和绝对定位实现水平滚动垂直不滚动实例页面

CSS代码：

.box-1 {
    max-width: 600px;
    overflow-y: hidden;
    position: relative;
}
.box-2 {
    width: 800px; height: 200px;
    overflow: auto;
}
.header {
    display: flex;
    position: absolute;
    width: inherit;
}
.header nav {
    flex: auto;
    background: #333;
    color: #fff;
    border: 1px solid;
}
.content img {
    width: 256px; height: 256px;
}

HTML代码：

<div class="box-1">
    <div class="box-2">
        <div class="header">
            <nav>导航1</nav>
            <nav>导航2</nav>
            <nav>导航3</nav>
        </div>
        <div class="content">
            <img src="1.jpg">
            <img src="1.jpg">
            <img src="1.jpg">
        </div>
    </div>
</div>