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@supports  (cursor: grab) or  not (mask: none) and  (color: black) {  a {    color: black;  }}
@supports not (display: flex) {  a {    color: #000;  }}
@supports ((perspective: 1px) and (not (-webkit-overflow-scrolling: touch))) {  a {    color: #000;  }}
@supports (animation-name: test) and ((animation-timing-function: steps(4, end)) or (animation-timing-function: step-end)) {  animation-name: test;}
@supports (transition: color 1s) {  transition: color 1s;}