.icon {
  position: relative;
  width: 32px;
  height: 32px;
  display: block;
  fill: rgba(51, 51, 51, 0.5);
  margin-right: 20px;
  -webkit-transition: all .2s ease-out;
          transition: all .2s ease-out;
}

.icon.active {
  fill: #E74C3C;
}

.icon.big {
  width: 64px;
  height: 64px;
  fill: rgba(51, 51, 51, 0.5);
}

#wrapper {
  width: 900px;
  height: 400px;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  margin: 50px auto;
  background-color: #fff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: left;
  -webkit-justify-content: left;
      -ms-flex-pack: left;
          justify-content: left;
  overflow: hidden;
}

#left-side {
  height: 70%;
  width: 25%;
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
      -ms-flex-pack: center;
          justify-content: center;
}
#left-side ul li {
  padding-top: 10px;
  padding-bottom: 10px;
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  line-height: 34px;
  color: rgba(51, 51, 51, 0.5);
  font-weight: 500;
  cursor: pointer;
  -webkit-transition: all .2s ease-out;
          transition: all .2s ease-out;
}
#left-side ul li:hover {
  color: #333333;
  -webkit-transition: all .2s ease-out;
          transition: all .2s ease-out;
}
#left-side ul li:hover > .icon {
  fill: #333;
}
#left-side ul li.active {
  color: #8f2927;
}
#left-side ul li.active:hover > .icon {
  fill: #E74C3C;
}

#border {
  height: 288px;
  width: 1px;
  background-color: rgba(51, 51, 51, 0.2);
}
#border #line.one,
#border #line.two,
#border #line.three,
#border #line.four{
  width: 5px;
  height: 54px;
  background-color: #8f2927;
  margin-left: -2px;
  -webkit-transition: all .4s ease-in-out;
          transition: all .4s ease-in-out;
}
#border #line.one {
  margin-top: 35px;
}
#border #line.two {
  margin-top: 89px;
}
#border #line.three {
  margin-top: 143px;
}
#border #line.four {
  margin-top: 197px;
}

#right-side {
	position: relative;
	height: 370px;
	width: 100%;
	overflow: hidden;
}
#right-side #first dl, 
#right-side #second dl, 
#right-side #third dl, 
#right-side #fourth dl{
	width: 100%;
	margin-bottom: 20px;
}
#right-side #first dl>dt, 
#right-side #second dl>dt, 
#right-side #third dl>dt, 
#right-side #fourth dl>dt{
	font-size: 16px;
	font-weight: bold;
	margin-bottom: 4px;
	color: #333;
}
#right-side #first dl>dd, 
#right-side #second dl>dd, 
#right-side #third dl>dd, 
#right-side #fourth dl>dd{
	color: #777;
}
#right-side #first, 
#right-side #second, 
#right-side #third, 
#right-side #fourth {
  position: absolute;
  height: 370px;
	width: 100%;
  padding: 0 4%;
  -webkit-transition: all .6s ease-in-out;
          transition: all .6s ease-in-out;
  margin-top: -350px;
  opacity: 0;
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -webkit-align-items: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
      -ms-flex-pack: center;
          justify-content: center;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -webkit-flex-direction: column;
      -ms-flex-direction: column;
          flex-direction: column;
}
#right-side #first h3, #right-side #second h3, #right-side #third h3, #right-side #fourth h3 {
	font-size: 24px;
  font-weight: 800;
  color: #333;
  margin-bottom: 30px;
}
#right-side #first p, #right-side #second p, #right-side #third p, #right-side #fourth p {
  color: #333;
  font-weight: 500;
  padding-left: 30px;
  padding-right: 30px;
}
#right-side #first.active, #right-side #second.active, #right-side #third.active, #right-side #fourth.active {
  margin-top: 0px;
  opacity: 1;
  -webkit-transition: all .6s ease-in-out;
          transition: all .6s ease-in-out;
}