.Introduction{
  width: 90%;
  margin: 0 auto;
  max-width: 80rem;
  font-size: 16px;
  font-family: 微軟正黑體, 蘋果儷中黑, "Lucida Grande", Arial, "Arial Narrow";
}

.cols{
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -ms-flex-wrap: wrap;
      flex-wrap: wrap;
  -webkit-box-pack: center;
      -ms-flex-pack: center;
          justify-content: center;
}

.col{
  width: calc(50% - 2rem);
  margin: 1rem;
  cursor: pointer;
}

.container{
  -webkit-transform-style: preserve-3d;
          transform-style: preserve-3d;
	-webkit-perspective: 1000px;
	        perspective: 1000px;
}

.front,
.back{
  background-size: cover;
	background-position: center;
	-webkit-transition: -webkit-transform .7s cubic-bezier(0.4, 0.2, 0.2, 1);
	transition: -webkit-transform .7s cubic-bezier(0.4, 0.2, 0.2, 1);
	-o-transition: transform .7s cubic-bezier(0.4, 0.2, 0.2, 1);
	transition: transform .7s cubic-bezier(0.4, 0.2, 0.2, 1);
	transition: transform .7s cubic-bezier(0.4, 0.2, 0.2, 1), -webkit-transform .7s cubic-bezier(0.4, 0.2, 0.2, 1);
	-webkit-backface-visibility: hidden;
	        backface-visibility: hidden;
	text-align: center;
	min-height: 550px;
	height: auto;
	border-radius: 10px;
	color: #fff;
	font-size: 1.5rem;
}

.back{
  background: #748d4c;

}

.front:after{
	position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
    width: 100%;
    height: 100%;
    content: '';
    display: block;
    opacity: .6;
    background-color: #000;
    -webkit-backface-visibility: hidden;
            backface-visibility: hidden;
    border-radius: 10px;
}
.container:hover .front,
.container:hover .back{
    -webkit-transition: -webkit-transform .7s cubic-bezier(0.4, 0.2, 0.2, 1);
    transition: -webkit-transform .7s cubic-bezier(0.4, 0.2, 0.2, 1);
    -o-transition: transform .7s cubic-bezier(0.4, 0.2, 0.2, 1);
    transition: transform .7s cubic-bezier(0.4, 0.2, 0.2, 1);
    transition: transform .7s cubic-bezier(0.4, 0.2, 0.2, 1), -webkit-transform .7s cubic-bezier(0.4, 0.2, 0.2, 1);
}

.back{
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
}

.inner{
    -webkit-transform: translateY(-50%) translateZ(60px) scale(0.94);
            transform: translateY(-50%) translateZ(60px) scale(0.94);
    top: 50%;
    position: absolute;
    left: 0;
    width: 100%;
    padding: 2rem;
    -webkit-box-sizing: border-box;
            box-sizing: border-box;
    outline: 1px solid transparent;
    -webkit-perspective: inherit;
            perspective: inherit;
    z-index: 2;
	text-align: center;
}
.inner p{
    font-size: 1.1rem;
    line-height: 170%;
	text-align:center;
}

.container .back{
    -webkit-transform: rotateY(180deg);
            transform: rotateY(180deg);
    -webkit-transform-style: preserve-3d;
            transform-style: preserve-3d;
}
.container .back .backbg{
	position: absolute;
	width: 100%;
	height: 100%;
}
.container .back .backbg img{width: 100%;height: 100%;object-fit: cover;border-radius: 10px;}
.container .front{
    -webkit-transform: rotateY(0deg);
            transform: rotateY(0deg);
    -webkit-transform-style: preserve-3d;
            transform-style: preserve-3d;
}

.container:hover .back{
  -webkit-transform: rotateY(0deg);
          transform: rotateY(0deg);
  -webkit-transform-style: preserve-3d;
          transform-style: preserve-3d;
}

.container:hover .front{
  -webkit-transform: rotateY(-180deg);
          transform: rotateY(-180deg);
  -webkit-transform-style: preserve-3d;
          transform-style: preserve-3d;
}

.front .inner h2,
.back .inner h3{
  font-size: 2rem;
  margin-bottom: 2rem;
  position: relative;
  text-align: center;
  font-weight: normal;
      line-height: 170%;
}

.front .inner h2:after{
  content: '';
  width: 4rem;
  height: 2px;
  position: absolute;
  background: #C6D4DF;
  display: block;
  left: 0;
  right: 0;
  margin: 0 auto;
  bottom: -.75rem;
}

.front .inner p{
  color: rgba(255,255,255,0.7);
  font-weight: 300;
  font-size: 1.1rem;
  line-height: 170%;
}

@media screen and (max-width: 64rem){
  .col{
    width: calc(50% - 2rem);
  }
}

@media screen and (max-width: 48rem){
  .col{
    width: calc(100% - 2rem);
  }
}

@media screen and (max-width: 32rem){
  .col{
    width: 100%;
    margin: 0 0 2rem 0;
  }
}
@media screen and (max-width: 1024px) {
	.front, .back {
		min-height: 550px;
	}
	.front .inner span {
		font-size: 16px;
	}
	.front .inner p {
	}
}
@media screen and (max-width: 450px){
	.front .inner span {
		font-size: 12px;
	}
	.front .inner p {
		font-size: 20px;
	}
	.front, .back {
		min-height: 550px;
	}
}
@media screen and (max-width: 375px){
	.front, .back {
		min-height: 575px;
	}
	.inner p {
		font-size: 16px;
		line-height: 170%;
	}
}