feat: remove index.css

index.css

-/*retain 1px border start*/
-/* 
-  retainbt: 上边框
-  retainbb: 下边框
-  retainbl: 左边框
-  retainbr: 右边框
-  retainb: 四周边框
-  retainbRound: 四周边框(圆角) 
-*/
-
-.retainbt,
-.retainbb,
-.retainbl,
-.retainbr,
-.retainb,
-.retainbRound {
-    position: relative;
-    position: relative !important;
-}
-
-.retainbt:before,
-.retainbb:after {
-    pointer-events: none;
-    position: absolute;
-    content: '';
-    height: 1px;
-    background: rgba(0, 0, 0, 0.2);
-    left: 0;
-    right: 0;
-}
-
-.retainbt:before {
-    top: 0;
-}
-
-.retainbb:after {
-    bottom: 0;
-}
-
-.retainbl:before,
-.retainbr:after {
-    pointer-events: none;
-    position: absolute;
-    content: '';
-    width: 1px;
-    background: rgba(0, 0, 0, 0.2);
-    top: 0;
-    bottom: 0;
-}
-
-.retainbl:before {
-    left: 0;
-}
-
-.retainbr:after {
-    right: 0;
-}
-
-.retainb:after {
-    position: absolute;
-    content: '';
-    top: 0;
-    left: 0;
-    -webkit-box-sizing: border-box;
-    box-sizing: border-box;
-    width: 100%;
-    height: 100%;
-    border: 1px solid rgba(0, 0, 0, 0.2);
-    pointer-events: none;
-}
-
-.retainbRound:after {
-    position: absolute;
-    content: '';
-    top: 0;
-    left: 0;
-    -webkit-box-sizing: border-box;
-    box-sizing: border-box;
-    width: 100%;
-    height: 100%;
-    border-radius: 10px;
-    border: 1px solid rgba(0, 0, 0, 0.2);
-    pointer-events: none;
-}
-
-@media (-webkit-min-device-pixel-ratio: 1.5),
-(min-device-pixel-ratio: 1.5),
-(min-resolution: 144dpi),
-(min-resolution: 1.5dppx) {
-
-    .retainbt:before,
-    .retainbb:after {
-        -webkit-transform: scaleY(0.5);
-        transform: scaleY(0.5);
-    }
-
-    .retainbl:before,
-    .retainbr:after {
-        -webkit-transform: scaleX(0.5);
-        transform: scaleX(0.5);
-    }
-
-    .retainb:after,
-    .retainbRound:after {
-        width: 200%;
-        height: 200%;
-        -webkit-transform: scale(0.5);
-        transform: scale(0.5);
-    }
-
-    .retainbt:before,
-    .retainbl:before,
-    .retainb:after,
-    .retainbRound:after {
-        -webkit-transform-origin: 0 0;
-        transform-origin: 0 0;
-    }
-
-    .retainbb:after,
-    .retainbr:after {
-        -webkit-transform-origin: 100% 100%;
-        transform-origin: 100% 100%;
-    }
-}
-
-@media (-webkit-device-pixel-ratio: 1.5) {
-
-    .retainbt:before,
-    .retainbb:after {
-        -webkit-transform: scaleY(0.6666);
-        transform: scaleY(0.6666);
-    }
-
-    .retainbl:before,
-    .retainbr:after {
-        -webkit-transform: scaleX(0.6666);
-        transform: scaleX(0.6666);
-    }
-
-    .retainb:after,
-    .retainbRound:after {
-        width: 150%;
-        height: 150%;
-        -webkit-transform: scale(0.6666);
-        transform: scale(0.6666);
-    }
-}
-
-@media (-webkit-device-pixel-ratio: 3) {
-
-    .retainbt:before,
-    .retainbb:after {
-        -webkit-transform: scaleY(0.3333);
-        transform: scaleY(0.3333);
-    }
-
-    .retainbl:before,
-    .retainbr:after {
-        -webkit-transform: scaleX(0.3333);
-        transform: scaleX(0.3333);
-    }
-
-    .retainb:after,
-    .retainbRound:after {
-        width: 300%;
-        height: 300%;
-        -webkit-transform: scale(0.3333);
-        transform: scale(0.3333);
-    }
-}
-
-/* retain 1px border end */
\ No newline at end of file