css 样式

1. 背景网格样式

background-image: linear-gradient(
    90deg,
    rgba(50, 0, 0, 0.05) 3%,
    rgba(0, 0, 0, 0) 3%
  ), linear-gradient(360deg, rgba(50, 0, 0, 0.05) 3%, rgba(0, 0, 0, 0) 3%);
background-size: 20px 20px;
background-position: center center;