timeline style : demo 151

CSS

(Fonts required: Poppins.)
                    .main-timeline{ font-family: 'Poppins', sans-serif; }
                    .main-timeline:after{
                        content: '';
                        display: block;
                        clear: both;
                    }
                    .main-timeline .timeline{
                        width: calc(50% + 17px);
                        padding: 0 30px 30px 0;
                        float: left; 
                        position: relative;
                    }
                    .main-timeline .timeline:before,
                    .main-timeline .timeline:after{
                        content: '';
                        height: 60px;
                        width: 2px;
                        border-left: 2px solid #BB0124;
                        transform: rotate(-45deg);
                        position: absolute;
                        right: 30px;
                        bottom: 0;
                    }
                    .main-timeline .timeline:after{
                        background-color: #fff;
                        height: 20px;
                        width: 20px;
                        border: 6px solid #BB0124;
                        border-radius: 50%;
                        right: 0;
                    }   
                    .main-timeline .timeline-content{
                        color: #555;
                        background: linear-gradient(to right bottom,#FF3653,#BB0124);
                        text-align: center;
                        min-height: 170px;
                        padding: 30px 35px 35px;
                        border-radius: 15px 15px 0 15px;
                        display: block;
                        position: relative;
                        z-index: 1;
                    }
                    .main-timeline .timeline-content:before{
                        content: '';
                        background-color: #fff;
                        position: absolute;
                        left: 17px;
                        right: 17px;
                        top: 17px;
                        bottom: 17px;
                        z-index: -1;
                    }
                    .main-timeline .timeline-content:hover{ text-decoration: none; }
                    .main-timeline .timeline-icon{
                        color: #777;
                        font-size: 35px;
                    }
                    .main-timeline .title{
                        font-size: 22px;
                        font-weight: 700;
                        letter-spacing: 2px;
                        text-transform: uppercase;
                        margin: 0 0 8px;
                    }
                    .main-timeline .description{
                        color: #777;
                        font-size: 13px;
                        font-weight: 400;
                        letter-spacing: 0.5px;
                        line-height: 18px;
                        margin: 0;
                    }
                    .main-timeline .timeline:nth-child(even){
                        padding: 0 0 30px 30px;
                        float: right;
                    }
                    .main-timeline .timeline:nth-child(even):before{
                        transform: rotate(45deg);
                        right: auto;
                        left: 30px;
                    }
                    .main-timeline .timeline:nth-child(even):after{
                        right: auto;
                        left: 0;
                    }
                    .main-timeline .timeline:nth-child(even) .timeline-content{ border-radius: 15px 15px 15px 0; }
                    .main-timeline .timeline:nth-child(4n+2):before,
                    .main-timeline .timeline:nth-child(4n+2):after{
                        border-color: #3DC7EA;
                    }
                    .main-timeline .timeline:nth-child(4n+2) .timeline-content{
                        background: linear-gradient(to top right,#39C6E6,#6AECE9);
                    }
                    .main-timeline .timeline:nth-child(4n+3):before,
                    .main-timeline .timeline:nth-child(4n+3):after{
                        border-color: #FD6552;
                    }
                    .main-timeline .timeline:nth-child(4n+3) .timeline-content{
                        background: linear-gradient(to right bottom,#FCD24E,#FD6552);
                    }
                    .main-timeline .timeline:nth-child(4n+4):before,
                    .main-timeline .timeline:nth-child(4n+4):after{
                        border-color: #225DB0;
                    }
                    .main-timeline .timeline:nth-child(4n+4) .timeline-content{
                        background: linear-gradient(to top right,#225DB0,#62ACEA);
                    }
                    @media screen and (max-width:767px){
                        .main-timeline .timeline{
                            width: 100%;
                            padding: 30px 0 0 30px;
                            margin: 0 0 20px;
                        }   
                        .main-timeline .timeline:before,
                        .main-timeline .timeline:nth-child(even):before{
                            transform: rotate(-45deg);
                            bottom: auto;
                            top: 0;
                            right: auto;
                            left: 30px;
                        }
                        .main-timeline .timeline:after,
                        .main-timeline .timeline:nth-child(even):after{
                            bottom: auto;
                            top: 0;
                            right: auto;
                            left: 0;
                        }
                        .main-timeline .timeline-content,
                        .main-timeline .timeline:nth-child(even) .timeline-content{
                            border-radius: 0 15px 15px 15px;
                        }
                    }
                    
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