html,body { background-image:url("images/208.jpg"); height:100%; //文字的显示区域要设置好 } div.mask { position:fixed; width:100%; height:100%; background-color:black; opacity:0.5; top:0px; left:0px; } div.bottom { width:100%; height:77px; background-color:#090909; position:fixed; bottom:0px; left:0px; text-align:center; line-height:77px; } div.bottom input.content { width:605px; height:37px; border:none; border-radius:10px 0px 0px 10px; font-size:16px; font-family:'Microsoft Yahei'; } div.bottom a.send { background-color:green; color:#fff; display:inline-block; width:150px; height:40px; line-height:37px; text-align:center; position:relative; left:-10px; top:-2px; border-radius:0px 10px 10px 0px; text-decoration:none; font-family:'Microsoft Yahei'; } div.mask a.button { width:50px; height:50px; border-radius:30px; background-color:#660000; color:#fff; position:fixed; top:20px; right:20px; text-align:center; line-height:50px; font-size:30px; font-family:'Microsoft Yahei'; border:1px solid #fff; text-decoration:none; cursor:pointer; } div.text { color:#fff; position:fixed; right:0px; font-size:20px; white-space:nowrap; }