*{ margin:0; padding:0; } html{ height:100%; } body{ background:#F1FDFE; height:100%; } .mom{ width:600px; height:100px; line-height:100px; text-align:center; font-size:30px; border-width:5px; border-style:dashed; border-color:rgb(200, 0, 255); position:relative; left:50%; margin-left:-300px; top:50%; margin-top:-50px; background:#e6fafd; color:rgb(255, 0, 55); }
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