源码
<div class="number">404</div>
<style>
body {
display: -webkit-box;
display: flex;
flex-flow: row wrap;
align-content: center;
justify-content: center;
}
div {
width: 100%;
text-align: center;
}
.number {
background: #fff;
position: relative;
font: 900 30vmin 'Consolas';
letter-spacing: 5vmin;
text-shadow: 2px -1px 0 #000, 4px -2px 0 #0a0a0a, 6px -3px 0 #0f0f0f, 8px -4px 0 #141414, 10px -5px 0 #1a1a1a, 12px -6px 0 #1f1f1f, 14px -7px 0 #242424, 16px -8px 0 #292929;
}
.number::before {
background-color: #673ab7;
background-image: radial-gradient(closest-side at 50% 50%, #ffc107 100%, rgba(0, 0, 0, 0)), radial-gradient(closest-side at 50% 50%, #e91e63 100%, rgba(0, 0, 0, 0));
background-repeat: repeat-x;
background-size: 40vmin 40vmin;
background-position: -100vmin 20vmin, 100vmin -25vmin;
width: 100%;
height: 100%;
mix-blend-mode: screen;
animation: moving 10s linear infinite both;
display: block;
position: absolute;
content: "";
}
@-webkit-keyframes moving {
to {
background-position: 100vmin 20vmin, -100vmin -25vmin;
}
}
@keyframes moving {
to {
background-position: 100vmin 20vmin, -100vmin -25vmin;
}
}
</style>
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