timeline style : demo 200

CSS

(Fonts required: Poppins.)
                    :root{ --main-color: #D52C63; }
                    .main-timeline{ font-family: 'Poppins', sans-serif; }
                    .main-timeline:after{
                        content: '';
                        display: block;
                        clear: both;
                    }
                    .main-timeline .timeline{
                        width: 52%;
                        margin: 0 0 20px;
                        float: left;
                        position: relative;
                        z-index: 1;
                    }
                    .main-timeline .timeline-content{
                        color: var(--main-color);
                        padding: 0 165px 0 0;
                        display: block;
                        position: relative;
                    }
                    .main-timeline .timeline-content:hover{ text-decoration: none; }
                    .main-timeline .timeline-icon{
                        color: var(--main-color);
                        font-size: 35px;
                        font-weight: 600;
                        text-align: center;
                        line-height: 100px;
                        height: 100px;
                        width: 45px;
                        box-shadow: 0 0 15px rgba(0,0,0,0.25);
                        transform: translateY(-50%);
                        position: absolute;
                        top: 50%;
                        right: 0;
                    }
                    .main-timeline .timeline-year{
                        color: #fff;
                        background-color: var(--main-color);
                        font-size: 20px;
                        line-height: 100px;
                        height: 100px;
                        width: 100px;
                        padding: 0 0 0 12px;
                        transform: translateY(-50%);
                        position: absolute;
                        top: 50%;
                        right: 50px;
                        clip-path: polygon(0 0, 0 100%, 100% 50%);
                    }
                    .main-timeline .title{
                        font-size: 19px;
                        font-weight: 600;
                        text-transform: capitalize;
                        margin: 0 0 10px;
                    }
                    .main-timeline .description{
                        font-size: 13px;
                        letter-spacing: 1px;
                        margin: 0;
                    }
                    .main-timeline .timeline:nth-child(even){
                        float: right; 
                        margin: 0 0 20px 10px;
                    }
                    .main-timeline .timeline:nth-child(even) .timeline-content{ padding: 0 0 0 165px; }
                    .main-timeline .timeline:nth-child(even) .timeline-icon{
                        left: 0;
                        right: auto;
                    }
                    .main-timeline .timeline:nth-child(even) .timeline-year{
                        text-align: right;
                        padding: 0 12px 0 0;
                        left: 50px;
                        right: auto;
                        clip-path: polygon(100% 0, 100% 100%, 0 50%);
                    }
                    .main-timeline .timeline:nth-child(2){ --main-color: #1B92D2; }
                    .main-timeline .timeline:nth-child(3){ --main-color: #ED8C25; }
                    .main-timeline .timeline:nth-child(4){ --main-color: #9e3674; }
                    @media screen and (max-width:767px){
                        .main-timeline .timeline,
                        .main-timeline .timeline:nth-child(even){
                            width: 100%;
                            margin: 0 0 30px;
                        }
                        .main-timeline .timeline-content,
                        .main-timeline .timeline:nth-child(even) .timeline-content{
                            padding: 0 0 0 165px;
                        }
                        .main-timeline .timeline-icon,
                        .main-timeline .timeline:nth-child(even) .timeline-icon{
                            left: 0;
                            right: auto;
                        }
                        .main-timeline .timeline-year,
                        .main-timeline .timeline:nth-child(even) .timeline-year{
                            text-align: right;
                            padding: 0 12px 0 0;
                            left: 50px;
                            right: auto;
                            clip-path: polygon(100% 0, 100% 100%, 0 50%);
                        }
                    }
                    @media screen and (max-width:576px){
                        .main-timeline .timeline-content,
                        .main-timeline .timeline:nth-child(even) .timeline-content{
                            text-align: center;
                            padding: 165px 0 0 0;
                        }
                        .main-timeline .timeline-icon,
                        .main-timeline .timeline:nth-child(even) .timeline-icon{
                            line-height: 51px;
                            width: 100px;
                            height: 50px;
                            transform: translateY(0) translateX(-50%);
                            top: 0;
                            left: 50%;
                        }
                        .main-timeline .timeline-year,
                        .main-timeline .timeline:nth-child(even) .timeline-year{
                            text-align: center;
                            line-height: 140px;
                            width: 100px;
                            height: 100px;
                            padding: 0;
                            transform: translateY(0) translateX(-50%);
                            top: 55px;
                            left: 50%;
                            clip-path: polygon(0 100%, 100% 100%, 50% 0);
                        }
                    }
                    
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