Pull request #2392: chore: 优化一下

Merge in VISUAL/fineui from ~GUY/fineui:master to master

* commit 'a0c6143476a6c4f57bc08834bd6df14347905bac':
  chore: 动画效果
  chore: 优化一下

src/less/base/single/input/checkbox.less

@@ -4,12 +4,14 @@
   & .checkbox-content, &.checkbox-content {
     .border-radius(2px);
     border: 1px solid @color-bi-border-checkbox;
-    box-sizing: border-box;
+    .box-sizing(border-box);
+    .transition(all .1s);
     &:after {
       position: absolute;
       display: table;
-      top: 50%;
+      // 百分比会出现像素误差
-      left: 20%;
+      top: 6px;
+      left: 2px;
       border: 2px solid transparent;
       border-top: 0;
       border-left: 0;
@@ -17,6 +19,8 @@
       height: 9px;
       .box-sizing(border-box);
       .transform(rotate(45deg) scale(1) translate(-50%, -50%));
+      @transition: all .1s cubic-bezier(.71,-.46,.88,.6),opacity .1s;
+      .transition(@transition);
       content: '';
     }
     &.hover, &:hover {

src/less/base/single/input/radio.less

@@ -5,6 +5,7 @@
     .border-radius(8px);
     border: 1px solid @color-bi-border-radio;
     .box-sizing(border-box);
+    .transition(all .1s);
     &:after {
       content: "";
     }
@@ -25,6 +26,8 @@
         .border-radius(3px);
         background-color: @color-bi-background-radio;
         .transform(translate(-50%, -50%));
+        @transition: all .1s cubic-bezier(.71,-.46,.88,.6),opacity .1s;
+        .transition(@transition);
       }
     }
   }