/* 全屏斜纹水印：疏间距、低对比，不挡阅读与操作 */
.sys-watermark {
  pointer-events: none;
  position: fixed;
  inset: -20%;
  z-index: 99999;
  overflow: hidden;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 9rem 6rem;
  padding: 4rem 3rem;
  transform: rotate(-24deg);
  transform-origin: center center;
  user-select: none;
  -webkit-user-select: none;
}
.sys-watermark span {
  white-space: nowrap;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .06em;
  color: rgba(15, 23, 42, .045);
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  text-align: center;
}
body.m-body .sys-watermark span {
  color: rgba(255, 255, 255, .06);
  font-size: 13px;
}