纯css 瀑布流

<!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;
        }

        .box {
            -moz-column-count: 3;
            /* Firefox */
            -webkit-column-count: 3;
            /* Safari 和 Chrome */
            column-count: 3;
            -moz-column-gap: 10px;
            -webkit-column-gap: 10px;
            column-gap: 10px;
            width: 80%;
            margin: 2em auto;

        }

        .test {

            margin-bottom: 10px;
            -moz-page-break-inside: avoid;
            -webkit-column-break-inside: avoid;
            break-inside: avoid;
            background: #f60;
        }

        @media screen and (max-width: 800px) {
            .box {
                column-count: 2;
            }
        }

        @media screen and (max-width: 500px) {
            .box {
                column-count: 1;
            }
        }
    </style>
</head>

<body>
    <div class="box">
        <div class="test" style="height: 50px"></div>
        <div class="test" style="height: 20px"></div>
        <div class="test" style="height: 50px"></div>
        <div class="test" style="height: 90px"></div>
        <div class="test" style="height: 90px"></div>
        <div class="test" style="height: 90px"></div>
        <div class="test" style="height: 90px"></div>
        <div class="test" style="height: 90px"></div>
        <div class="test" style="height: 90px"></div>
        <div class="test" style="height: 90px"></div>
        <div class="test" style="height: 90px"></div>
        <div class="test" style="height: 90px"></div>
        <div class="test" style="height: 90px"></div>
        <div class="test" style="height: 90px"></div>
        <div class="test" style="height: 90px"></div>
        <div class="test" style="height: 90px"></div>
        <div class="test" style="height: 90px"></div>
        <div class="test" style="height: 90px"></div>
        <div class="test" style="height: 90px"></div>
        <div class="test" style="height: 90px"></div>
        <div class="test" style="height: 90px"></div>
        <div class="test" style="height: 90px"></div>
        <div class="test" style="height: 90px"></div>
    </div>
</body>

</html>
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