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display: none;   visibility: hidden;    opacity: 0;  color:transparent;  background: transparent;  position: absolute;  top: 999em;  transform: scale(0);  width: 0;  height: 0;  overflow: hidden;  position:fix/absolute;  clip:rect(1px 1px 1px 1px);  hidden // html5 全局属性    text-indent: -999em;

参考