body {
  overflow-x: hidden;
  margin: 0;
  font-family: '微软雅黑', Arial, sans-serif;
  background-image: linear-gradient(to bottom, rgba(255,255,255,1) 0%, rgba(255,255,255,0.5) 100%), url('/img/bg_imh/丝路山水地图 (2).jpg');
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center center;
  background-attachment: fixed;
}