body{
    font-family: Arial, "Microsoft Yahei", sans-serif !important;
  padding: 0;
  color: #222;
  margin: 0 auto;
  background: #f9f9f9 !important;

}

body>img{
    width: 100%;
    height: 100%;
}

#app{
    line-height: 24px;
}

div.maincontent{
    padding: 20px;
}

div>span{
    display: flex;
    flex-direction: row;
    justify-content: center;
}

div.content{
    margin-top: 40px;
    margin-bottom: 40px;
    background-color: white;
}