body,html{height:100%}.student-login{background:#fff url(../image/mine/bg_login_stu.png) no-repeat;background-size:100%;background-position:0 bottom}.teacher-login{background:#fff url(../image/mine/bg_login_tea.png) no-repeat;background-size:100%;background-position:0 bottom}.ic-log-user{background:url(../image/mine/ic_log_user.png) no-repeat;background-size:100% 100%}.ic-log-pass{background:url(../image/mine/ic_log_pass.png) no-repeat;background-size:100% 100%}.ic-num{height:34px}