两个div，右边的div保持100px，左边跟随浏览器大小变化

<div class="box"> <div class="left"></div> <div class="right"></div> </div> .box{ width: 100%; height: 100px; background: pink; display: flex; } .left{ height:100px; background-color: green; flex: 1; } .right{ width: 100px; background-color: orange; }