timeline style : demo 27

CSS

                        .main-timeline{
                            overflow: hidden;
                            position: relative;
                        }
                        .main-timeline:before{
                            content: "";
                            width: 7px;
                            height: 100%;
                            background: #909090;
                            position: absolute;
                            top: 0;
                            left: 50%;
                            transform: translateX(-50%);
                        }
                        .main-timeline .timeline{
                            width: 50%;
                            padding-left: 50px;
                            float: right;
                            position: relative;
                        }
                        .main-timeline .timeline:before{
                            content: "";
                            width: 30px;
                            height: 30px;
                            border-radius: 50%;
                            background: #909090;
                            border: 7px solid #fff;
                            position: absolute;
                            top: 50%;
                            left: -15px;
                            transform: translateY(-50%);
                        }
                        .main-timeline .timeline:after{
                            content: "";
                            display: block;
                            border-right: 30px solid #ee4423;
                            border-top: 20px solid transparent;
                            border-bottom: 20px solid transparent;
                            position: absolute;
                            top: 50%;
                            left: 24px;
                            transform: translateY(-50%);
                        }
                        .main-timeline .timeline-content{
                            display: block;
                            padding: 25px;
                            border-radius: 100px;
                            background: #ee4423;
                            position: relative;
                        }
                        .main-timeline .timeline-content:before,
                        .main-timeline .timeline-content:after{
                            content: "";
                            display: block;
                            width: 100%;
                            clear: both;
                        }
                        .main-timeline .timeline-content:hover{ text-decoration: none; }
                        .main-timeline .inner-content{
                            width: 70%;
                            float: right;
                            padding: 15px 20px 15px 15px;
                            background: #fff;
                            border-radius: 0 100px 100px 0;
                            color: #ee4423;
                        }
                        .main-timeline .year{
                            display: inline-block;
                            font-size: 50px;
                            font-weight: 600;
                            color: #fff;
                            position: absolute;
                            top: 50%;
                            left: 7%;
                            transform: translateY(-50%);
                        }
                        .main-timeline .title{
                            font-size: 24px;
                            font-weight: 600;
                            text-transform: uppercase;
                            margin: 0 0 5px 0;
                        }
                        .main-timeline .description{
                            font-size: 14px;
                            margin: 0 0 5px 0;
                        }
                        .main-timeline .timeline:nth-child(2n){ padding: 0 50px 0 0; }
                        .main-timeline .timeline:nth-child(2n):before,
                        .main-timeline .timeline:nth-child(2n) .year{
                            left: auto;
                            right: -15px;
                        }
                        .main-timeline .timeline:nth-child(2n) .year{ right: 7%; }
                        .main-timeline .timeline:nth-child(2n):after{
                            border-right: none;
                            border-left: 30px solid #ee4423;
                            left: auto;
                            right: 24px;
                        }
                        .main-timeline .timeline:nth-child(2n) .inner-content{
                            float: none;
                            border-radius: 100px 0 0 100px;
                            text-align: right;
                        }
                        .main-timeline .timeline:nth-child(2){ margin-top: 130px; }
                        .main-timeline .timeline:nth-child(odd){ margin: -130px 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) .timeline-content{ background: #f68829; }
                        .main-timeline .timeline:nth-child(2n),
                        .main-timeline .timeline:nth-child(2n) .inner-content{ color: #f68829; }
                        .main-timeline .timeline:nth-child(2n):after{ border-left-color: #f68829; }
                        .main-timeline .timeline:nth-child(3n) .timeline-content{ background: #2991d0; }
                        .main-timeline .timeline:nth-child(3n),
                        .main-timeline .timeline:nth-child(3n) .inner-content{ color: #2991d0; }
                        .main-timeline .timeline:nth-child(3n):after{ border-right-color: #2991d0; }
                        .main-timeline .timeline:nth-child(4n) .timeline-content{ background: #9361aa; }
                        .main-timeline .timeline:nth-child(4n),
                        .main-timeline .timeline:nth-child(4n) .inner-content{ color: #9361aa; }
                        .main-timeline .timeline:nth-child(4n):after{ border-left-color: #9361aa; }
                        .main-timeline .timeline:nth-child(5n) .timeline-content{ background: #a7be26; }
                        .main-timeline .timeline:nth-child(5n),
                        .main-timeline .timeline:nth-child(5n) .inner-content{ color: #a7be26; }
                        .main-timeline .timeline:nth-child(5n):after{ border-right-color: #a7be26; }
                        @media only screen and (max-width: 1200px){
                            .main-timeline .inner-content{ width: 80%; }
                            .main-timeline .year{
                                font-size: 45px;
                                left: 10px;
                                transform: translateY(-50%) rotate(-90deg);
                            }
                            .main-timeline .timeline:nth-child(2n) .year{ right: 10px; }
                        }
                        @media only screen and (max-width: 990px){
                            .main-timeline .year{
                                font-size: 40px;
                                left: 0;
                            }
                            .main-timeline .timeline:nth-child(2n) .year{ right: 0; }
                        }
                        @media only screen and (max-width: 767px){
                            .main-timeline:before,
                            .main-timeline .timeline:before{
                                left: 10px;
                                transform: translateX(0);
                            }
                            .main-timeline .timeline:nth-child(2n):after{
                                border-left: none;
                                border-right: 30px solid #ee4423;
                                right: auto;
                                left: 24px;
                            }
                            .main-timeline .timeline,
                            .main-timeline .timeline:nth-child(even),
                            .main-timeline .timeline:nth-child(odd){
                                width: 100%;
                                float: none;
                                margin: 0 0 30px 0;
                            }
                            .main-timeline .timeline:last-child{ margin-bottom: 0; }
                            .main-timeline .timeline:nth-child(2n){ padding: 0 0 0 50px; }
                            .main-timeline .timeline:before,
                            .main-timeline .timeline:nth-child(2n):before{ left: -2px; }
                            .main-timeline .inner-content{ width: 85%; }
                            .main-timeline .timeline:nth-child(2n) .inner-content{
                                float: right;
                                border-radius: 0 100px 100px 0;
                                text-align: left;
                            }
                            .main-timeline .timeline:nth-child(2n) .year{
                                right: auto;
                                left: 0;
                            }
                            .main-timeline .timeline:nth-child(2n):after{ border-right-color: #f68829; }
                            .main-timeline .timeline:nth-child(3n):after{ border-left-color: #2991d0; }
                            .main-timeline .timeline:nth-child(4n):after{ border-right-color: #9361aa; }
                            .main-timeline .timeline:nth-child(5n):after{ border-left-color: #a7be26; }
                        }

                        @media only screen and (max-width: 479px){
                            .main-timeline .timeline-content{ padding: 15px; }
                            .main-timeline .inner-content{ width: 80%; }
                            .main-timeline .year{ font-size: 30px; }
                        }
                    
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