console 命令行工具 X clear
console
<!DOCTYPE HTML>
<html>
    <head>
        <style>
            div{
                width:100%;
                height: 50px;
                border: 1px solid blue;
            }
            .font{
                line-height:50px;
                font-size: 18px;
                letter-spacing: 5px;
                writing-mode: vertical-lr;
            }
        </style>
    </head>
    <body>
        <div class="font">春眠不觉晓处处闻啼鸟夜来风雨声花落知多少</div>
    </body>
</html>