<div class="container"></div>
以下为部分CSS代码
.container::before {
content: "";
position: absolute;
inset: -145%;
rotate: -45deg;
background: #000;
background-image: radial-gradient(4px 100px at 0px 235px, #0f0, #0000),
radial-gradient(4px 100px at 300px 235px, #0f0, #0000),
radial-gradient(1.5px 1.5px at 150px 117.5px, #0f0 100%, #0000 150%),