css
毛玻璃 nav bar
.blur-nav::before {
content: "";
position: absolute;
width: 100%;
height: 100%;
-webkit-backdrop-filter: saturate(180%) blur(5px);
backdrop-filter: saturate(180%) blur(5px);
backface-visibility: hidden;
perspective: 1000;
z-index: -1;
top: -1px;
transform: translateZ(0);
}
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