timeline style : demo 182

CSS

(Fonts required: Poppins.)
                    :root{ --main-color: #D64B3D; }
                    .demo{ background: radial-gradient(#fff,#ccc); }
                    .main-timeline{ font-family: 'Poppins', sans-serif; }
                    .main-timeline:after{
                        content: '';
                        display: block;
                        clear: both;
                    }
                    .main-timeline .timeline{
                        width: 50%;
                        padding: 0 0 0 30px;
                        margin: 0 5px 15px 0;
                        float: left;
                        position: relative;
                        z-index: 1;
                    }
                    .main-timeline .timeline-content{
                        background-color: #fff;
                        padding: 35px 75px 35px 40px;
                        box-shadow: 0 0 15px -3px rgba(0,0,0,0.3);
                        display: block;
                        position: relative;
                    }
                    .main-timeline .timeline-content:hover{ text-decoration: none; }
                    .main-timeline .timeline-content:before{
                        content: '';
                        height: 50%;
                        width: 50px;
                        background-color: var(--main-color);
                        transform: translateY(-50%);
                        position: absolute;
                        left: -30px;
                        top: 50%;
                        bottom: 15px;
                        right: 15px;
                        z-index: -1;
                        clip-path: polygon(0 0, 30% 50%, 0 100%, 100% 100%, 100% 0);
                    }
                    .main-timeline .timeline-icon{
                        color: #fff;
                        background: var(--main-color);
                        font-size: 35px;
                        text-align: center;
                        line-height: 80px;
                        width: 80px;
                        height: 80px;
                        transform: translateY(-50%);
                        position: absolute;
                        top: 50%;
                        right: -40px;
                        z-index: 1;
                    }
                    .main-timeline .title{
                        color: #333;
                        font-size: 22px;
                        font-weight: 600;
                        text-transform: uppercase;
                        margin: 0 0 5px;
                    }
                    .main-timeline .description{
                        color: #777;
                        font-size: 13px;
                        letter-spacing: 1px;
                        line-height: 20px;
                        margin: 0;
                    }
                    .main-timeline .timeline:nth-child(even){
                        padding: 0 30px 0 0;
                        margin: 0 0 15px 5px;
                        float: right;
                    }
                    .main-timeline .timeline:nth-child(even) .timeline-content{ padding: 35px 40px 35px 75px; }
                    .main-timeline .timeline:nth-child(even) .timeline-content:before{
                        transform: translateY(-50%) rotateY(180deg);
                        left: auto;
                        right: -30px;
                    }
                    .main-timeline .timeline:nth-child(even) .timeline-icon{
                        left: -40px;
                        right: auto;
                    }
                    .main-timeline .timeline:nth-child(4n+2){ --main-color: #416F7F; }
                    .main-timeline .timeline:nth-child(4n+3){ --main-color: #373B3C; }
                    .main-timeline .timeline:nth-child(4n+4){ --main-color: #89348A; }
                    @media screen and (max-width:767px){
                        .main-timeline .timeline,
                        .main-timeline .timeline:nth-child(even){
                            width: calc(100%);
                            padding: 0 40px 0 30px;
                        }
                        .main-timeline .timeline:nth-child(even){ padding: 0 30px 0 40px; }
                    }
                    @media screen and (max-width:479px){
                        .main-timeline .timeline,
                        .main-timeline .timeline:nth-child(even){
                            width: 100%;
                            padding: 40px 0 30px;
                            margin: 0 0 30px;
                        }
                        .main-timeline .timeline-content,
                        .main-timeline .timeline:nth-child(even) .timeline-content{
                            text-align: center;
                            padding: 70px 25px 35px;
                        }
                        .main-timeline .timeline-content:before,
                        .main-timeline .timeline:nth-child(even) .timeline-content:before{
                            transform: translateY(0) translateX(-50%) rotate(-90deg);
                            left: 50%;
                            right: auto;
                            top: auto;
                            bottom: -65px;
                        }
                        .main-timeline .timeline-icon, 
                        .main-timeline .timeline:nth-child(even) .timeline-icon{
                            transform: translateY(0) translateX(50%);
                            top: -40PX;
                            right: 50%;
                            left: auto;
                        }
                    }
                    
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