<!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: 0;
            padding: 0;
        }
        html,body{
            height: 100%;
        }
        .red {
            height: 200px;
            background-color: rgb(151, 45, 45);
        }

        .green {
            background-color: rgb(13, 226, 13);
            height: calc(100% - 200px);
        }
    </style>
</head>
<body>
    <div class="red">
        红色
    </div>
    <div class="green">
        绿色
    </div>
</body>
</html>

[css] 剩余高度自适应_html

调整顺序，因绿色为主要内容，需要先加载

<!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: 0;
            padding: 0;
        }
        .red {
            height: 200px;
            background-color: rgb(151, 45, 45);
            width:200px;
            position: absolute;
            top: 0;
            left: 0;
        }

        .green {
            height: 200px;
            background-color: rgb(13, 226, 13);
            margin-left: 200px;
        }
    </style>
</head>

<body>
    <!-- 调整顺序，因绿色为主要内容，需要先加载 -->
    <div class="green">
        绿色
    </div>
    <div class="red">
        红色
    </div>
</body>

</html>

[css] 剩余高度自适应_html_02