简略登录界面

学校失物招领登录系统 body{ overflow:hidden} *{ margin: 0px ; padding: 0px} html,body,section,div{ height:100% ; width:100%}  section{ position: relative;} #diyibufen{ width: 1280px; height:800px; margin: 0 auto; background:url(beijing1.jpg)no-repeat ; padding-top: 0;     position: relative; margin-bottom:0; overflow:hidden; top:-50% ; margin-top:400px} #limian{ width: 600px; height: 300px; background: #6699FF; margin: 0 auto; border: #DCDCDC solid 2px; padding: 10px; margin-top: 180px;}