body{overflow:hidden;}
.login_background{ width:100%; height:100%; position:absolute; left:0; top:0; z-index:90; background-color:rgba(0,0,0,0.5); }
.login{ height:260px;width:260px;padding: 20px;background-color:rgba(0,0,0,0.5);border-radius: 4px;position:absolute;left: 50%;top: 50%; margin:-150px 0 0 -150px;z-index:99;}
.login h1{ text-align:center; color:#fff; font-size:24px; margin-bottom:20px; }
.form_code{ position:relative; }
.form_code .code{ position:absolute; right:0; top:1px; cursor:pointer; }
.login_btn{ width:100%; }
.layui-form-checkbox{margin-right: 8px; height: 18px; line-height: 18px; padding-right: 20px}
.layui-form-checkbox i{width: 16px; height: 16px; font-size: 14px}
.layui-form-checked i, .layui-form-checked:hover i{color: red}