.main-timeline{
    overflow: hidden;
    position: relative;
}
.main-timeline .timeline{ position: relative; }
.main-timeline .timeline:before,
.main-timeline .timeline:after{
    content: "";
    display: block;
    width: 100%;
    clear: both;
}
.main-timeline .timeline:before{
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #fff;
    margin: auto;
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    z-index: 2;
}
.main-timeline .timeline-icon{
    width: 16px;
    height: 95%;
    background: #029bbd;
    margin: auto;
    position: absolute;
    top: 5%;
    left: 0;
    bottom: 0;
    right: 0;
    z-index: 1;
}
.main-timeline .timeline-icon:before,
.main-timeline .timeline-icon:after{
    content: "";
    border-bottom: 11px solid #029bbd;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    position: absolute;
    top: -11px;
    left: 0;
}
.main-timeline .timeline-icon:after{
    border-bottom-color: #fff;
    top: auto;
    bottom: 0;
}
.main-timeline .year{
    display: inline-block;
    padding: 5px 35px;
    margin: 0;
    border-radius: 4px;
    font-size: 26px;
    color: #fff;
    background: linear-gradient(to right, #079dc0, #01c2bf);
    text-align: center;
    position: absolute;
    top: 50%;
    left: 32%;
    transform: translateY(-50%);
}
.main-timeline .timeline-content{
    width: 50%;
    float: right;
    padding: 0 60px 30px 60px;
    position: relative;
}
.main-timeline .icon{
    display: inline-block;
    font-size: 40px;
    color: #a7a7a7;
    margin-bottom: 7px;
}
.main-timeline .title{
    font-size: 20px;
    font-weight: bold;
    color: #a7a7a7;
    margin: 0 0 7px 0;
}
.main-timeline .description{
    font-size: 14px;
    color: #a7a7a7;
    line-height: 24px;
    margin: 0;
}
.main-timeline .timeline:nth-child(2n) .year{
    left: auto;
    right: 32%;
}
.main-timeline .timeline:nth-child(2n) .timeline-content{ float: left; }
.main-timeline .timeline:nth-child(2n) .year{ background: linear-gradient(to right, #9e489f, #b64877); }
.main-timeline .timeline:nth-child(2n) .timeline-icon{ background: #9e489f; }
.main-timeline .timeline:nth-child(2n) .timeline-icon:before{ border-bottom-color: #9e489f; }
.main-timeline .timeline:nth-child(3n) .year{ background: linear-gradient(to right, #6ab00f, #9fce26); }
.main-timeline .timeline:nth-child(3n) .timeline-icon{ background: #6ab00f; }
.main-timeline .timeline:nth-child(3n) .timeline-icon:before{ border-bottom-color: #6ab00f; }
.main-timeline .timeline:nth-child(4n) .year{ background: linear-gradient(to right, #d84704, #ea703f); }
.main-timeline .timeline:nth-child(4n) .timeline-icon{ background: #d44908; }
.main-timeline .timeline:nth-child(4n) .timeline-icon:before{ border-bottom-color: #d44908; }
@media only screen and (max-width: 1200px){
    .main-timeline .year{ left: 28%; }
    .main-timeline .timeline:nth-child(2n) .year{ right: 28%; }
}
@media only screen and (max-width: 990px){
    .main-timeline .year{ left: 25%; }
    .main-timeline .timeline:nth-child(2n) .year{ right: 25%; }
}
@media only screen and (max-width: 767px){
    .main-timeline .timeline{ padding-top: 30px; }
    .main-timeline .timeline:before{
        border: 15px solid transparent;
        border-top-color: #029bbd;
        border-bottom: 10px solid transparent;
        margin: 0 auto;
        position: absolute;
        top: 1px;
        left: 0;
        z-index: 2;
    }
    .main-timeline .timeline:nth-child(2n):before{ border-top-color: #9e489f; }
    .main-timeline .timeline:nth-child(3n):before{ border-top-color: #6ab00f; }
    .main-timeline .timeline:nth-child(4n):before{ border-top-color: #d44908; }
    .main-timeline .timeline-icon{
        width: 100%;
        height: 16px;
        margin: 0;
        top: 0;
        left: 0;
    }
    .main-timeline .timeline-icon:before,
    .main-timeline .timeline-icon:after{
        border: 8px solid transparent;
        border-left: 8px solid #fff;
        top: 0;
        left: 0;
    }
    .main-timeline .timeline-icon:after{
        border-left: none;
        border-right: 8px solid #fff;
        left: auto;
        right: 0;
    }
    .main-timeline .year,
    .main-timeline .timeline:nth-child(2n) .year{
        display: block;
        margin: 0 30px 10px 30px;
        position: relative;
        top: 0;
        left: 0;
        transform: translateY(0);
    }
    .main-timeline .timeline-content,
    .main-timeline .timeline:nth-child(2n) .timeline-content{
        width: 100%;
        float: none;
        text-align: center;
        padding: 0 30px 20px;
    }
}