.lock-container{height:100%;display:flex;align-items:center;justify-content:center;position:relative}.lock-container .title{margin-bottom:8px;color:#333}.lock-container:before{z-index:-999;content:"";position:absolute;left:0;top:0;width:100%;height:100%;background-image:url(/img/bg/login.png);background-size:cover}.lock-form{width:300px}