timeline style : demo 148

CSS

(Fonts required: Poppins | Roboto Condensed.)
                    .main-timeline{ font-family: 'Roboto Condensed', sans-serif; }
                    .main-timeline:after{
                        content: '';
                        display: block;
                        clear: both;
                    }
                    .main-timeline .timeline{
                        width: calc(50% + 75px);
                        margin: 0 0 20px;
                        float: left; 
                    }
                    .main-timeline .timeline-content{
                        color: #00CBBB;
                        text-align: center;
                        min-height: 100px;
                        padding: 10px 170px 10px 0;
                        display: block;
                        position: relative;
                    }
                    .main-timeline .timeline-content:hover{ text-decoration: none; }
                    .main-timeline .timeline-icon{
                        font-size: 35px;
                        line-height: 35px;
                        transform: translateY(-50%);
                        position: absolute;
                        top: calc(50% - 25px);
                        right: 58px;
                    }
                    .main-timeline .timeline-year{
                        color: #fff;
                        background-color: #00CBBB;
                        font-size: 47px;
                        font-weight: 700;
                        line-height: 45px;
                        letter-spacing: -2px;
                        width: 150px;
                        transform: translateY(-50%);
                        position: absolute;
                        top: calc(50% + 20px);
                        right: 0;
                        clip-path: polygon(0 0, 100% 0, 90% 50%, 100% 100%, 0 100%, 10% 50%);
                    }
                    .main-timeline .title{
                        font-size: 22px;
                        font-weight: 600;
                        text-transform: uppercase;
                        margin: 0 0 10px;
                    }
                    .main-timeline .description{
                        color: #555;
                        font-family: 'Poppins', sans-serif;
                        font-size: 13px;
                        font-weight: 400;
                        letter-spacing: 0.5px;
                        line-height: 18px;
                        margin: 0;
                    }
                    .main-timeline .timeline:nth-child(even){ float: right; }
                    .main-timeline .timeline:nth-child(even) .timeline-content{ padding: 10px 0 10px 170px; }
                    .main-timeline .timeline:nth-child(even) .timeline-icon{
                        right: auto;
                        left: 58px;
                    }
                    .main-timeline .timeline:nth-child(even) .timeline-year{
                        right: auto;
                        left: 0;
                    }
                    .main-timeline .timeline:nth-child(4n+2) .timeline-content{ color: #FE7803; }
                    .main-timeline .timeline:nth-child(4n+2) .timeline-year{ background-color: #FE7803; }
                    .main-timeline .timeline:nth-child(4n+3) .timeline-content{ color: #EC3739; }
                    .main-timeline .timeline:nth-child(4n+3) .timeline-year{ background-color: #EC3739; }
                    .main-timeline .timeline:nth-child(4n+4) .timeline-content{ color: #A42F69; }
                    .main-timeline .timeline:nth-child(4n+4) .timeline-year{ background-color: #A42F69; }
                    @media screen and (max-width:767px){
                        .main-timeline .timeline{
                            width: 100%;
                            margin: 0 0 30px;
                        }   
                    }
                    @media screen and (max-width:576px){
                        .main-timeline .timeline-content,
                        .main-timeline .timeline:nth-child(even) .timeline-content{
                            padding: 110px 10px 10px;
                        }
                        .main-timeline .timeline-icon,
                        .main-timeline .timeline:nth-child(even) .timeline-icon{
                            transform: translateY(0) translateX(-50%);
                            left: 50%;
                            right: auto;
                            top: 0;
                        }
                        .main-timeline .timeline-year,
                        .main-timeline .timeline:nth-child(even) .timeline-year{
                            transform: translateY(0) translateX(-50%);
                            left: 50%;
                            right: auto;
                            top: 41px;
                        }
                    }
                    
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