* {margin:0;padding:0;border-box;box-sizing; }
body { background:#bdbdbd; }
.fr { float:right; }
.fl { float:left; }
.btn {width: 100px;text-align: center}
a {text-decoration:none;color:#000000; }
/*头部*/
.header {height:100px;background:#333; position:fixed; left:0;right:0;top:0;  text-align:center; }
    .header h1 { color:#ff6a00; line-height:50px;}
    .header a {color:#ff6a00; }

.menu_left { width:200px;background:#666;position:fixed;left:0;top:100px;bottom:0;    }
.pageview{ position:fixed;left:200px;right:0;top:100px;bottom:0;padding: 20px; }


.login{
    width: 100%;
    margin: 200px auto;
    line-height: 50px;
}
.login input{height: 34px; margin-top:8px;margin-left: 10px;}
@media only screen and (max-height:560px){
    .login {
        margin-top:100px;
    }
}
.header ul li {width: 15%;float: right;height: 50px;line-height: 50px;}
.header ul li a {display:block;width: 100%;height: 100%; line-height: 50px;}
.header ul li a:hover{background: #666;}