.box-shadow(@shadow: 5px 5px 10px #cccccc) {
  -webkit-box-shadow: @shadow;
     -moz-box-shadow: @shadow;
          box-shadow: @shadow;
}
.border-radius(@radius: 5px) {
  -webkit-border-radius: @radius;
     -moz-border-radius: @radius;
          border-radius: @radius;
}
.opacity(@opacity: 80) {
	opacity: @opacity / 100;
	filter: ~"alpha(opacity=@{opacity})";
}
.user-select(@type:auto){
	-khtml-user-select: @type;
	-webkit-user-select: @type;  /* Chrome all / Safari all */
	-moz-user-select: @type;     /* Firefox all */
	-ms-user-select: @type;      /* IE 10+ */
	-o-user-select: @type;
	user-select: @type;
}
.background-color(@color,@alpha:0.8){
  background:@color~'\9';
  background:rgba(red(@color),green(@color),blue(@color),@alpha); 
}
.border-color(@color,@alpha:0.8){
  border-color:@color~'\9';
  border-color:rgba(red(@color),green(@color),blue(@color),@alpha);  
}

/* 渐变色 */
.gradient (@origin: left, @start: #ffffff, @stop: #000000) {
    background:@stop;
    background-image: -webkit-linear-gradient(@origin, @start, @stop);
    background-image: -moz-linear-gradient(@origin, @start, @stop);
    background-image: -o-linear-gradient(@origin, @start, @stop);
    background-image: -ms-linear-gradient(@origin, @start, @stop);
    background-image: linear-gradient(@origin, @start, @stop);
}
/* 动画 */
.transition(@type:all 0.2s){
    -webkit-transition: @type;
    -moz-transition: @type;
    -o-transition: @type;
    -ms-transition:@type;
    transition: @type;
}
.background-size(@size:100% 100%){
  -moz-background-size:@size;
  -o-background-size:@size;
  -webkit-background-size:@size;
  -ms-background-size:@size;
  background-size:@size;
}

//**
// * transform: none
// * transform: matrix(1.0, 2.0, 3.0, 4.0, 5.0, 6.0)
// * transform: translate(12px, 50%)
// * transform: translateX(2em)
// * transform: translateY(3in)
// * transform: scale(2, 0.5)
// * transform: scaleX(2)
// * transform: scaleY(0.5)
// * transform: rotate(0.5turn)
// * transform: skewX(30deg)
// * transform: skewY(1.07rad)
// * transform: matrix3d(1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 10.0, 11.0, 12.0, 13.0, 14.0, 15.0, 16.0)
// * transform: translate3d(12px, 50%, 3em)
// * transform: translateZ(2px)
// * transform: scale3d(2.5, 1.2, 0.3)
// * transform: scaleZ(0.3)
// * transform: rotate3d(1, 2.0, 3.0, 10deg)
// * transform: rotateX(10deg)
// * transform: rotateY(10deg)
// * transform: rotateZ(10deg)
// * transform: perspective(17px)
// * transform: translateX(10px) rotate(10deg) translateY(5px)
// */

// 旋转
.rotate(@degress) {
  -webkit-transform: scale(@degress);
     -moz-transform: scale(@degress);
      -ms-transform: scale(@degress);
       -o-transform: scale(@degress);
          transform: scale(@degress);
}
// 三维旋转
.rotate3d(@x, @y, @z, @degress){
  -webkit-transform: rotate3d(@x, @y, @z, @degress);
     -moz-transform: rotate3d(@x, @y, @z, @degress);
      -ms-transform: rotate3d(@x, @y, @z, @degress);
       -o-transform: rotate3d(@x, @y, @z, @degress);
          transform: rotate3d(@x, @y, @z, @degress);
}
.rotateX(@degress){
  -webkit-transform: rotateX(@degrees);
     -moz-transform: rotateX(@degrees);
      -ms-transform: rotateX(@degrees);
       -o-transform: rotateX(@degrees);
          transform: rotateX(@degrees);
}
.rotateY(@degress){
  -webkit-transform: rotateY(@degrees);
     -moz-transform: rotateY(@degrees);
      -ms-transform: rotateY(@degrees);
       -o-transform: rotateY(@degrees);
          transform: rotateY(@degrees);
}
.rotateZ(@degress){
  -webkit-transform: rotateZ(@degrees);
     -moz-transform: rotateZ(@degrees);
      -ms-transform: rotateZ(@degrees);
       -o-transform: rotateZ(@degrees);
          transform: rotateZ(@degrees);
}


//缩放
.scale(@ratio) {
  -webkit-transform: scale(@ratio);
     -moz-transform: scale(@ratio);
      -ms-transform: scale(@ratio);
       -o-transform: scale(@ratio);
          transform: scale(@ratio);
}
.scaleX(@ratio) {
  -webkit-transform: scaleX(@ratio);
     -moz-transform: scaleX(@ratio);
      -ms-transform: scaleX(@ratio);
       -o-transform: scaleX(@ratio);
          transform: scaleX(@ratio);
}
.scaleY(@ratio) {
  -webkit-transform: scaleY(@ratio);
     -moz-transform: scaleY(@ratio);
      -ms-transform: scaleY(@ratio);
       -o-transform: scaleY(@ratio);
          transform: scaleY(@ratio);
}

//
.translate(@x, @y) {
  -webkit-transform: translate(@x, @y);
     -moz-transform: translate(@x, @y);
      -ms-transform: translate(@x, @y);
       -o-transform: translate(@x, @y);
          transform: translate(@x, @y);
}
.translate3d(@x, @y, @z) {
  -webkit-transform: translate3d(@x, @y, @z);
     -moz-transform: translate3d(@x, @y, @z);
       -o-transform: translate3d(@x, @y, @z);
          transform: translate3d(@x, @y, @z);
}
.translateX(@x){
  -webkit-transform: translateX(@x);
     -moz-transform: translateX(@x);
      -ms-transform: translateX(@x);
       -o-transform: translateX(@x);
          transform: translateX(@x);
}
.translateY(@y){
  -webkit-transform: translateY(@y);
     -moz-transform: translateY(@y);
      -ms-transform: translateY(@y);
       -o-transform: translateY(@y);
          transform: translateY(@y);
}
.translateZ(@z){
  -webkit-transform: translateZ(@z);
     -moz-transform: translateZ(@z);
      -ms-transform: translateZ(@z);
       -o-transform: translateZ(@z);
          transform: translateZ(@z);
}

//变形
.skew(@x, @y) {
  -webkit-transform: skew(@x, @y);
     -moz-transform: skew(@x, @y);
      -ms-transform: skewX(@x) skewY(@y); 
       -o-transform: skew(@x, @y);
          transform: skew(@x, @y);
  -webkit-backface-visibility: hidden;
}
.skewX(@x) {
  -webkit-transform: skewX(@x);
     -moz-transform: skewX(@x);
      -ms-transform: skewX(@x);
       -o-transform: skewX(@x);
          transform: skewX(@x);
  -webkit-backface-visibility: hidden;
  //Webkit gives a pixelated edge. This can be resolved by adding the following line to the mixin. -webkit-backface-visibility: hidden;
}
.skewY(@y) {
  -webkit-transform: skewY(@y);
     -moz-transform: skewY(@y);
      -ms-transform: skewY(@y); 
       -o-transform: skewY(@y);
          transform: skewY(@y);
  -webkit-backface-visibility: hidden;
}

.transition(@transition) {
  -webkit-transition: @transition;
    -moz-transition: @transition;
       -o-transition: @transition;
          transition: @transition;
}
.transition-delay(@transition-delay: 0s) {
  -webkit-transition-delay: @transition-delay;
     -moz-transition-delay: @transition-delay;
       -o-transition-delay: @transition-delay;
          transition-delay: @transition-delay;
}
.transition-duration(@transition-duration: 0s){
	-webkit-transition-delay: @transition-duration;
     -moz-transition-delay: @transition-duration;
       -o-transition-delay: @transition-duration;
          transition-delay: @transition-duration;
}
.transition-property(@transition-property){
  -webkit-transition-delay: @transition-property;
     -moz-transition-delay: @transition-property;
       -o-transition-delay: @transition-property;
          transition-delay: @transition-property;
}
.transition-timing-function(@transition-timing: ease){
	-webkit-transition-delay: @transition-timing;
     -moz-transition-delay: @transition-timing;
       -o-transition-delay: @transition-timing;
          transition-delay: @transition-timing;
}