.main-timeline:after{
    content: '';
    display: block;
    clear: both;
}
.main-timeline .timeline{
    width: calc(50% - 1px);
    padding: 3px 0;
    margin: 0 2px 0 0;
    float: left;
}
.main-timeline .timeline-content{
    color: #777;
    background-color: #fff;
    text-align: center;
    padding: 20px 60px 20px 0;
    display: block;
    position: relative;
}
.main-timeline .timeline-content:hover{ text-decoration: none; }
.main-timeline .timeline-content:before{
    content: '';
    background: #629BDD;
    width: 40px;
    transform: skewY(-20deg);
    position: absolute;
    right: -20px;
    top: 0;
    bottom: 0;
}
.main-timeline .timeline-year{
    color: #555;
    background-color: #629BDD;
    font-size: 25px;
    font-weight: 600;
    line-height: 100px;
    height: 100px;
    width: 100px;
    border-radius: 50%;
    transform: translateY(-50%);
    position: absolute;
    top: 50%;
    right: -50px;
    z-index: 1;
}
.main-timeline .timeline-year:before{
    content: '';
    background-color: #fff;
    border-radius: 50%;
    box-shadow: 5px 5px 7px rgba(0,0,0,0.4);
    position: absolute;
    left: 10px;
    right: 10px;
    top: 10px;
    bottom: 10px;
    z-index: -1;
}
.main-timeline .title{
    color: #629BDD;
    font-size: 22px;
    font-weight: 600;
    text-transform: capitalize;
    letter-spacing: 0.5px;
    margin: 0 0 5px;
}
.main-timeline .description{
    font-size: 14px;
    letter-spacing: 1px;
    line-height: 22px;
    margin: 0;
}
.main-timeline .timeline:nth-child(even){ float: right; }
.main-timeline .timeline:nth-child(even) .timeline-content{ padding: 20px 0 20px 60px; }
.main-timeline .timeline:nth-child(even) .timeline-content:before{
    right: auto;
    left: -20px;
}
.main-timeline .timeline:nth-child(even) .timeline-year{
    right: auto;
    left: -50px;
}
.main-timeline .timeline:nth-child(4n+2) .timeline-content:before,
.main-timeline .timeline:nth-child(4n+2) .timeline-year{
    background: #345DAC;
}
.main-timeline .timeline:nth-child(4n+2) .title{ color: #345DAC; }
.main-timeline .timeline:nth-child(4n+3) .timeline-content:before,
.main-timeline .timeline:nth-child(4n+3) .timeline-year{
    background: #BC6ADC;
}
.main-timeline .timeline:nth-child(4n+3) .title{ color: #BC6ADC; }
.main-timeline .timeline:nth-child(4n+4) .timeline-content:before,
.main-timeline .timeline:nth-child(4n+4) .timeline-year{
    background: #ba2574;
}
.main-timeline .timeline:nth-child(4n+4) .title{ color: #ba2574; }
@media screen and (max-width:767px){
    .main-timeline .timeline,
    .main-timeline .timeline:nth-child(even){
        width: 100%;
        margin: 0 0 2px;
    }
    .main-timeline .timeline-content,
    .main-timeline .timeline:nth-child(even) .timeline-content{
        padding: 20px 0 20px 120px;
    }
    .main-timeline .timeline-content:before,
    .main-timeline .timeline:nth-child(even) .timeline-content:before{
        left: 30px;
    }
    .main-timeline .timeline-year,
    .main-timeline .timeline:nth-child(even) .timeline-year{
        left: 0;
        right: auto;
    }
}