timeline style : demo 28

CSS

                        .main-timeline{
                            overflow: hidden;
                            position: relative;
                        }
                        .main-timeline:before{
                            content: "";
                            width: 5px;
                            height: 70%;
                            background:#333;
                            position: absolute;
                            top: 70px;
                            left: 50%;
                            transform: translateX(-50%);
                        }
                        .main-timeline .timeline{
                            width: 50%;
                            padding-left: 100px;
                            float: right;
                            position: relative;
                        }
                        .main-timeline .timeline:before{
                            content: "";
                            width: 20px;
                            height: 20px;
                            border-radius: 50%;
                            background: #fff;
                            border: 5px solid #333;
                            position: absolute;
                            top: 50%;
                            left: -10px;
                            transform: translateY(-50%);
                        }
                        .main-timeline .timeline-content{
                            display: block;
                            padding-left: 150px;
                            position: relative;
                        }
                        .main-timeline .timeline-content:before{
                            content: "";
                            width: 90px;
                            height: 10px;
                            border-top: 7px dotted #333;
                            position: absolute;
                            top: 50%;
                            left: -92px;
                            transform: translateY(-50%);
                        }
                        .main-timeline .year{
                            display: inline-block;
                            width: 120px;
                            height: 120px;
                            line-height: 100px;
                            border-radius: 50%;
                            border: 10px solid #f54957;
                            font-size: 30px;
                            color: #f54957;
                            text-align: center;
                            box-shadow: inset 0 0 10px rgba(0,0,0,0.4);
                            position: absolute;
                            top: 0;
                            left: 0;
                        }
                        .main-timeline .year:before{
                            content: "";
                            border-left: 20px solid #f54957;
                            border-top: 10px solid transparent;
                            border-bottom: 10px solid transparent;
                            position: absolute;
                            bottom: -13px;
                            right: 0;
                            transform: rotate(45deg);
                        }
                        .main-timeline .inner-content{ padding: 20px 0; }
                        .main-timeline .title{
                            font-size: 24px;
                            font-weight: 600;
                            color: #f54957;
                            text-transform: uppercase;
                            margin: 0 0 5px 0;
                        }
                        .main-timeline .description{
                            font-size: 14px;
                            color: #6f6f6f;
                            margin: 0 0 5px 0;
                        }
                        .main-timeline .timeline:nth-child(2n){ padding: 0 100px 0 0; }
                        .main-timeline .timeline:nth-child(2n):before,
                        .main-timeline .timeline:nth-child(2n) .timeline-content:before,
                        .main-timeline .timeline:nth-child(2n) .year{
                            left: auto;
                            right: -10px;
                        }
                        .main-timeline .timeline:nth-child(2n) .timeline-content{ padding: 0 150px 0 0; }
                        .main-timeline .timeline:nth-child(2n) .timeline-content:before{ right: -92px; }
                        .main-timeline .timeline:nth-child(2n) .year{ right: 0; }
                        .main-timeline .timeline:nth-child(2n) .year:before{
                            right: auto;
                            left: 0;
                            border-left: none;
                            border-right: 20px solid #f54957;
                            transform: rotate(-45deg);
                        }
                        .main-timeline .timeline:nth-child(2){ margin-top: 110px; }
                        .main-timeline .timeline:nth-child(odd){ margin: -110px 0 0 0; }
                        .main-timeline .timeline:nth-child(even){ margin-bottom: 80px; }
                        .main-timeline .timeline:first-child,
                        .main-timeline .timeline:last-child:nth-child(even){ margin: 0; }
                        .main-timeline .timeline:nth-child(2n) .year{
                            border-color: #1ebad0;
                            color: #1ebad0;
                        }
                        .main-timeline .timeline:nth-child(2) .year:before{ border-right-color: #1ebad0; }
                        .main-timeline .timeline:nth-child(2n) .title{ color: #1ebad0; }
                        .main-timeline .timeline:nth-child(3n) .year{
                            border-color: #7cba01;
                            color: #7cba01;
                        }
                        .main-timeline .timeline:nth-child(3) .year:before{ border-left-color: #7cba01; }
                        .main-timeline .timeline:nth-child(3n) .title{ color: #7cba01; }
                        .main-timeline .timeline:nth-child(4n) .year{
                            border-color: #f8781f;
                            color: #f8781f;
                        }
                        .main-timeline .timeline:nth-child(4) .year:before{ border-right-color: #f8781f; }
                        .main-timeline .timeline:nth-child(4n) .title{ color: #f8781f; }
                        @media only screen and (max-width: 1200px){
                            .main-timeline .year{
                                top: 50%;
                                transform: translateY(-50%);
                            }
                        }
                        @media only screen and (max-width: 990px){
                            .main-timeline .timeline{ padding-left: 75px; }
                            .main-timeline .timeline:nth-child(2n){ padding: 0 75px 0 0; }
                            .main-timeline .timeline-content{ padding-left: 130px; }
                            .main-timeline .timeline:nth-child(2n) .timeline-content{ padding: 0 130px 0 0; }
                            .main-timeline .timeline-content:before{
                                width: 68px;
                                left: -68px;
                            }
                            .main-timeline .timeline:nth-child(2n) .timeline-content:before{ right: -68px; }
                        }
                        @media only screen and (max-width: 767px){
                            .main-timeline{ overflow: visible; }
                            .main-timeline:before{
                                height: 100%;
                                top: 0;
                                left: 0;
                                transform: translateX(0);
                            }
                            .main-timeline .timeline:before,
                            .main-timeline .timeline:nth-child(2n):before{
                                top: 60px;
                                left: -9px;
                                transform: translateX(0);
                            }
                            .main-timeline .timeline,
                            .main-timeline .timeline:nth-child(even),
                            .main-timeline .timeline:nth-child(odd){
                                width: 100%;
                                float: none;
                                text-align: center;
                                padding: 0;
                                margin: 0 0 10px 0;
                            }
                            .main-timeline .timeline-content,
                            .main-timeline .timeline:nth-child(2n) .timeline-content{ padding: 0; }
                            .main-timeline .timeline-content:before,
                            .main-timeline .timeline:nth-child(2n) .timeline-content:before{ display: none; }
                            .main-timeline .year,
                            .main-timeline .timeline:nth-child(2n) .year{
                                position: relative;
                                transform: translateY(0);
                            }
                            .main-timeline .year:before,
                            .main-timeline .timeline:nth-child(2n) .year:before{
                                border: none;
                                border-right: 20px solid #f54957;
                                border-top: 10px solid transparent;
                                border-bottom: 10px solid transparent;
                                top: 50%;
                                left: -23px;
                                bottom: auto;
                                right: auto;
                                transform: rotate(0);
                            }
                            .main-timeline .timeline:nth-child(2n) .year:before{ border-right-color: #1ebad0; }
                            .main-timeline .timeline:nth-child(3n) .year:before{ border-right-color: #7cba01; }
                            .main-timeline .timeline:nth-child(4n) .year:before{ border-right-color: #f8781f; }
                            .main-timeline .inner-content{ padding: 10px; }
                        }
                    
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