body{
   font-family: "华文中宋", "宋体", Arial, sans-serif;
    color: #333;
    font-size: 10pt;
    line-height: 1.8;
    opacity: 0.9;
    //background: #fff url(https://images2017.cnblogs.com/blog/871373/201801/871373-20180107150852831-977219349.jpg) no-repeat top center fixed;
}