* { margin:0; padding:0; font-family:"微软雅黑"; } li { list-style:none; } a { text-decoration:none; } img { display:block; } .guanggao { width:100%; height:200px; position:absolute; } .guanggao img { width:100%; height:100%; } .dianji { background-color:green; width:100px; height:30px; cursor:pointer; margin-top:250px; position:absolute; color:white; text-align:center; line-height:30px; }