[TOC] #### css 背景虛化 ~~~css /* 關鍵詞值 */ backdrop-filter: none; /* SVG 過濾器 */ backdrop-filter: url(commonfilters.svg#filter); /* <filter-function> 過濾器函數 */ backdrop-filter: blur(2px); backdrop-filter: brightness(60%); backdrop-filter: contrast(40%); backdrop-filter: drop-shadow(4px 4px 10px blue); backdrop-filter: grayscale(30%); backdrop-filter: hue-rotate(120deg); backdrop-filter: invert(70%); backdrop-filter: opacity(20%); backdrop-filter: sepia(90%); backdrop-filter: saturate(80%); /* 多重過濾器 */ backdrop-filter: url(filters.svg#filter) blur(4px) saturate(150%); /* 全局值 */ backdrop-filter: inherit; backdrop-filter: initial; backdrop-filter: unset; ~~~