body {
}
 * {
             margin: 0;
             padding: 0;
         }

         body {
             overflow-x: hidden;
         }

         .table-sy {
             width: 100%;
             height: 100%;
             position: absolute;
             pointer-events: none;
             /*主要是这个属性*/
             color: #F5DEB3; /*水印颜色*/
             z-index: 99999999999;
             opacity: 1.0;/*透明度*/
         }

             .table-sy > div {
                 display: flex;
                 align-items: center;
                 justify-content: center;
                 transform: rotate(-40deg);
                 float: left;
             }

         .content {
             width: 100%;
             height: 100%;
             background: #ffffff; /*背景颜色*/
         }