timeline style : demo 121

CSS

(Fonts required: Exo 2.)
                        .main-timeline{ font-family: 'Exo 2', sans-serif; }
                        .main-timeline:after{
                            content: '';
                            display: block;
                            clear: both;
                        }
                        .main-timeline .timeline{
                            width: 50%;
                            margin: 0 0 20px 5px;
                            float: right;
                        }
                        .main-timeline .timeline-content{
                            color: #fff;
                            background: linear-gradient(#e52d27, #b31217);
                            padding: 15px 15px 35px 135px;
                            border-radius: 50px 0;
                            border: 20px solid #e7e7e7;
                            display: block;
                            overflow: hidden;
                            position: relative;
                            z-index: 1;
                        }
                        .main-timeline .timeline-content:hover{ text-decoration: none; }
                        .main-timeline .timeline-content:before{
                            content: '';
                            background-color: rgba(255,255,255,0.25);
                            height: 300px;
                            width: 300px;
                            border-radius: 50%;
                            position: absolute;
                            left: -180px;
                            bottom: -125px;
                            z-index: -1;
                        }
                        .main-timeline .timeline-icon{
                            font-size: 60px;
                            position: absolute;
                            left: 20px;
                            bottom: 15px;
                        }
                        .main-timeline .title{
                            font-size: 20px;
                            font-weight: 500;
                            text-transform: uppercase;
                            letter-spacing: 0.5px;
                            margin: 0 0 5px;
                        }
                        .main-timeline .description{
                            font-size: 14px;
                            margin: 0;
                        }
                        .main-timeline .timeline:nth-child(even){
                            margin: 0 5px 20px 0;
                            float: left;
                        }
                        .main-timeline .timeline:nth-child(even) .timeline-content{ padding: 15px 135px 35px 20px; }
                        .main-timeline .timeline:nth-child(even) .timeline-content:before{
                            left: auto;
                            right: -180px;
                        }
                        .main-timeline .timeline:nth-child(even) .timeline-icon{
                            left: auto;
                            right: 20px;
                        }
                        .main-timeline .timeline:nth-child(4n+2) .timeline-content{
                            background: linear-gradient(#ef761a, #FF512F);
                        }
                        @media screen and (max-width:990px){
                            .main-timeline .timeline{ width: 70%; }
                        }
                        @media screen and (max-width:767px){
                            .main-timeline .timeline,
                            .main-timeline .timeline:nth-child(even){
                                width: 100%;
                                margin: 0 0 35px 0;
                            }
                            .main-timeline .timeline-content,
                            .main-timeline .timeline:nth-child(even) .timeline-content{
                                text-align: center;
                                padding: 100px 15px 15px;
                            }
                            .main-timeline .timeline-content:before,
                            .main-timeline .timeline:nth-child(even) .timeline-content:before{
                                transform: translateX(-50%);
                                left: 50%;
                                right: auto;
                                bottom: auto;
                                top: -215px;
                            }
                            .main-timeline .timeline-icon,
                            .main-timeline .timeline:nth-child(even) .timeline-icon{
                                font-size: 40px;
                                transform: translateX(-50%);
                                left: 50%;
                                top: 10px;
                            }
                        }
                    
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