<body>
    <div>
        <div style="font-family: -webkit-system-font; font-size: 24px">This is a test for -webkit-system-font font</div>
        <div style="font: 30.0px '-webkit-system-font'">This is a test for -webkit-system-font font</div>
        <div style="font-family: -webkit-system-font; font-size: 30px">This is a test for -webkit-system-font font</div>
        <div style="font-family: -webkit-system-font; font-size: 36px"><b>This is a test for -webkit-system-font font</b></div>
        <div style="font-family: -webkit-system-font; font-size: 42px"><i>This is a test for -webkit-system-font font</i></div>
        <div style="font-family: -webkit-system-font; font-size: 48px">This is a test for -webkit-system-font font</div>
        <div style="font-family: -webkit-system-font; font-size: 54px">This is a test for -webkit-system-font font</div>
        <div style="font-family: -webkit-system-font; font-size: 60px">This is a test for -webkit-system-font font</div>
        <div style="font-family: -webkit-system-font; font-size: 66px">This is a test for -webkit-system-font font</div>
        <div style="font-family: -webkit-system-font; font-size: 72px">This is a test for -webkit-system-font font</div>
    </div>
    <div>
        <div style="font-family: -apple-system; font-size: 24px">This is a test for -apple-system font</div>
        <div style="font: 30.0px '-apple-system'">This is a test for -apple-system font</div>
        <div style="font-family: -apple-system; font-size: 30px">This is a test for -apple-system font</div>
        <div style="font-family: -apple-system; font-size: 36px"><b>This is a test for -apple-system font</b></div>
        <div style="font-family: -apple-system; font-size: 42px"><i>This is a test for -apple-system font</i></div>
        <div style="font-family: -apple-system; font-size: 48px">This is a test for -apple-system font</div>
        <div style="font-family: -apple-system; font-size: 54px">This is a test for -apple-system font</div>
        <div style="font-family: -apple-system; font-size: 60px">This is a test for -apple-system font</div>
        <div style="font-family: -apple-system; font-size: 66px">This is a test for -apple-system font</div>
        <div style="font-family: -apple-system; font-size: 72px">This is a test for -apple-system font</div>
    </div>
    <div>
        <div style="font-family: -apple-system; font-weight: 100">This is a font weight test for -apple-system font</div>
        <div style="font-family: -apple-system; font-weight: 200">This is a font weight test for -apple-system font</div>
        <div style="font-family: -apple-system; font-weight: 300">This is a font weight test for -apple-system font</div>
        <div style="font-family: -apple-system; font-weight: 400">This is a font weight test for -apple-system font</div>
        <div style="font-family: -apple-system; font-weight: 500">This is a font weight test for -apple-system font</div>
        <div style="font-family: -apple-system; font-weight: 600">This is a font weight test for -apple-system font</div>
        <div style="font-family: -apple-system; font-weight: 700">This is a font weight test for -apple-system font</div>
        <div style="font-family: -apple-system; font-weight: 800">This is a font weight test for -apple-system font</div>
        <div style="font-family: -apple-system; font-weight: 900">This is a font weight test for -apple-system font</div>
    </div>
    <div>
        <div style="font-family: -apple-system-monospaced-numbers; font-size: 24px">This is a test for -apple-system-monospaced-numbers font - 00:11:22:33</div>
        <div style="font: 30.0px '-apple-system-monospaced-numbers'">This is a test for -apple-system-monospaced-numbers font - 00:11:22:33</div>
        <div style="font-family: -apple-system-monospaced-numbers; font-size: 30px">This is a test for -apple-system-monospaced-numbers font - 00:11:22:33</div>
        <div style="font-family: -apple-system-monospaced-numbers; font-size: 36px">This is a test for -apple-system-monospaced-numbers font - 00:11:22:33</div>
    </div>
</body>