<!DOCTYPE html>
<html>
    <head>
        <style>
            body {
                font: 16px/1.25 monospace;
            }

            #content {
                -webkit-flow-into: flow1;
                padding: 5px;
            }

            .first-box {
                border: 1px solid blue;
            }

            .second-box {
                margin: auto;
                border: 1px solid green;
                overflow:hidden;
                width:75%;
                position:relative;
                z-index:0;
                padding-bottom:20px;
            }

            #region1, #region2, #region3 {
                border: 1px solid black;
                -webkit-flow-from: flow1;
            }

            #region1 {
                width: 200px;
                height: 100px;
            }

            #region2 {
                width: 300px;
                height: 180px;
            }

            #region3 {
                width: 120px;
                height: 120px;
            }
        </style>
    </head>
    <body>
        <p>The first and last lines of text in the regions below should be clipped to the green box. The overflow
        section sizes itself and clips differently in each region.</p>

        <div id="content">
            <div class="first-box">
                <div class="second-box">
                    <div style="width:500px; opacity:0.8">Clipped line of text that should not be visible.</div>
                    <p>These lines will not spill out of the regions. These lines will not spill out of the regions.
                    These lines will not spill out of the regions. These lines will not spill out of the regions.
                    These lines will not spill out of the regions.</p>
                    <div style="width:500px; position:absolute;bottom:0">Clipped line of text that should not be visible.</div>
                </div>
            </div>
        </div>

        <div id="container">
            <div id="region1"></div>
            <div id="region2"></div>
            <div id="region3"></div>
        </div>
    </body>
</html>