2017年总结的前端文章——CSS高级技巧汇总

body:before{
    content: "";
    position: fixed;
    top:-10px;
    left: 0;
    width: 100%;
    height: 10px;
    box-shadow: 0px 0px 10px rgba(0,0,0,.8);
    z-index: 100;
}

    body {

      line-height: 1;

    }

    html, body {

      height: 100%;

      margin: 0;

    }

    body {

      -webkit-align-items: center;  

      -ms-flex-align: center;  

      align-items: center;

      display: -webkit-flex;

      display: flex;

    }