.main-timeline{
  overflow: hidden;
  position: relative;
}

.main-timeline:before{
  content: "";
  width: 7px;
  height: 100%;
  background: #909090;
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
}

.main-timeline .timeline{
  width: 50%;
  padding-left: 50px;
  float: right;
  position: relative;
}

.main-timeline .timeline:before{
  content: "";
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: #909090;
  border: 7px solid #fff;
  position: absolute;
  top: 50%;
  left: -15px;
  transform: translateY(-50%);
}

.main-timeline .timeline:after{
  content: "";
  display: block;
  border-right: 30px solid #ee4423;
  border-top: 20px solid transparent;
  border-bottom: 20px solid transparent;
  position: absolute;
  top: 50%;
  left: 24px;
  transform: translateY(-50%);
}

.main-timeline .timeline-content{
  display: block;
  padding: 25px;
  border-radius: 100px;
  background: #ee4423;
  position: relative;
}

.main-timeline .timeline-content:before,
.main-timeline .timeline-content:after{
  content: "";
  display: block;
  width: 100%;
  clear: both;
}

.main-timeline .timeline-content:hover{ text-decoration: none; }

.main-timeline .inner-content{
  width: 70%;
  float: right;
  padding: 15px 20px 15px 15px;
  background: #fff;
  border-radius: 0 100px 100px 0;
  color: #ee4423;
}

.main-timeline .year{
  display: inline-block;
  font-size: 50px;
  font-weight: 600;
  color: #fff;
  position: absolute;
  top: 50%;
  left: 7%;
  transform: translateY(-50%);
}

.main-timeline .title{
  font-size: 24px;
  font-weight: 600;
  text-transform: uppercase;
  margin: 0 0 5px 0;
}

.main-timeline .description{
  font-size: 14px;
  margin: 0 0 5px 0;
}

.main-timeline .timeline:nth-child(2n){ padding: 0 50px 0 0; }

.main-timeline .timeline:nth-child(2n):before,
.main-timeline .timeline:nth-child(2n) .year{
  left: auto;
  right: -15px;
}

.main-timeline .timeline:nth-child(2n) .year{ right: 7%; }

.main-timeline .timeline:nth-child(2n):after{
  border-right: none;
  border-left: 30px solid #ee4423;
  left: auto;
  right: 24px;
}

.main-timeline .timeline:nth-child(2n) .inner-content{
  float: none;
  border-radius: 100px 0 0 100px;
  text-align: right;
}

.main-timeline .timeline:nth-child(2){ margin-top: 130px; }

.main-timeline .timeline:nth-child(odd){ margin: -130px 0 0 0; }

.main-timeline .timeline:nth-child(even){ margin-bottom: 80px; }

.main-timeline .timeline:first-child,
.main-timeline .timeline:last-child:nth-child(even){ margin: 0; }

.main-timeline .timeline:nth-child(2n) .timeline-content{ background: #f68829; }

.main-timeline .timeline:nth-child(2n),
.main-timeline .timeline:nth-child(2n) .inner-content{ color: #f68829; }

.main-timeline .timeline:nth-child(2n):after{ border-left-color: #f68829; }

.main-timeline .timeline:nth-child(3n) .timeline-content{ background: #2991d0; }

.main-timeline .timeline:nth-child(3n),
.main-timeline .timeline:nth-child(3n) .inner-content{ color: #2991d0; }

.main-timeline .timeline:nth-child(3n):after{ border-right-color: #2991d0; }

.main-timeline .timeline:nth-child(4n) .timeline-content{ background: #9361aa; }

.main-timeline .timeline:nth-child(4n),
.main-timeline .timeline:nth-child(4n) .inner-content{ color: #9361aa; }

.main-timeline .timeline:nth-child(4n):after{ border-left-color: #9361aa; }

.main-timeline .timeline:nth-child(5n) .timeline-content{ background: #a7be26; }

.main-timeline .timeline:nth-child(5n),
.main-timeline .timeline:nth-child(5n) .inner-content{ color: #a7be26; }

.main-timeline .timeline:nth-child(5n):after{ border-right-color: #a7be26; }


@media only screen and (max-width: 1200px){
  .main-timeline .inner-content{ width: 80%; }
  .main-timeline .year{
      font-size: 45px;
      left: 10px;
      transform: translateY(-50%) rotate(-90deg);
  }
  .main-timeline .timeline:nth-child(2n) .year{ right: 10px; }
}

@media only screen and (max-width: 990px){
  .main-timeline .year{
      font-size: 40px;
      left: 0;
  }
  .main-timeline .timeline:nth-child(2n) .year{ right: 0; }
}

@media only screen and (max-width: 767px){
  .main-timeline:before,
  .main-timeline .timeline:before{
      left: 10px;
      transform: translateX(0);
  }
  .main-timeline .timeline:nth-child(2n):after{
      border-left: none;
      border-right: 30px solid #ee4423;
      right: auto;
      left: 24px;
  }
  .main-timeline .timeline,
  .main-timeline .timeline:nth-child(even),
  .main-timeline .timeline:nth-child(odd){
      width: 100%;
      float: none;
      margin: 0 0 30px 0;
  }
  .main-timeline .timeline:last-child{ margin-bottom: 0; }
  .main-timeline .timeline:nth-child(2n){ padding: 0 0 0 50px; }
  .main-timeline .timeline:before,
  .main-timeline .timeline:nth-child(2n):before{ left: -2px; }
  .main-timeline .inner-content{ width: 85%; }
  .main-timeline .timeline:nth-child(2n) .inner-content{
      float: right;
      border-radius: 0 100px 100px 0;
      text-align: left;
  }
  .main-timeline .timeline:nth-child(2n) .year{
      right: auto;
      left: 0;
  }
  .main-timeline .timeline:nth-child(2n):after{ border-right-color: #f68829; }
  .main-timeline .timeline:nth-child(3n):after{ border-left-color: #2991d0; }
  .main-timeline .timeline:nth-child(4n):after{ border-right-color: #9361aa; }
  .main-timeline .timeline:nth-child(5n):after{ border-left-color: #a7be26; }
}

@media only screen and (max-width: 479px){
  .main-timeline .timeline-content{ padding: 15px; }
  .main-timeline .inner-content{ width: 80%; }
  .main-timeline .year{ font-size: 30px; }
}