.main-timeline-section{
    position: relative;
    width: 100%;  
    margin:auto;
}
    .main-timeline-section .timeline-start,
    .main-timeline-section .timeline-end {
        background: #ffd800;
        border-radius: 100px;
        margin: 0 auto;
        width: 30px;
        height: 30px;
    }
.main-timeline-section .conference-center-line {
    position: absolute;
    width: 4px;
    height:100%;
    top: 0;
    left:50%;
    margin-left: -2px;
    background:#ffd800;
    z-index: 0;
}
.timeline-article{
    width:100%;
    position:relative;
    margin: 0px;
    min-height: 135px;
    z-index: 0;
}
.timeline-article .content-date{
    position: absolute;
    top:-20%;
    left:50%; 
    font-size:12px;
    margin-top: 30px;
    margin-left: -250px;
    transform: translateY(50%);
}
    .timeline-article .meta-date {
        position: absolute;
        top: 50%;
        left: 50%;
        width: 20px;
        height: 20px;
        transform: translateY(-50%);
        margin-left: -11px;
        border-radius: 100%;
        background: #fff;
        border: 1px solid #ffd800;
    }
    .timeline-article .content-box {
        position: absolute;
        box-shadow: 2px 2px 4px 0px #c1c1c1;
        border: 1px solid #ffd800;
        border-radius: 5px;
        background-color: #fff;
        width: 40%;
        top: 50%;
        transform: translateY(-50%);
        padding: 8px;
        left: 50%;
        margin-left: 50px;
    }
.content-left-container .content-box{
    left:5%;
    margin-left: 0px;
}
.content-left-container .content-date{
    margin-left: 50px;
}

.content-right-container .content-box:before {
    content: " ";
    position: absolute;
    left: -10px;
    top: 40%;
    transform: translateX(-50%);
    border: 10px solid transparent;
    border-right-color: #ffd800;
    display: block;
}
.content-left-container .content-box:before {
    content: " ";
    position: absolute;
    top: 40%;
    right: -30px;
    transform: translateX(-50%);
    border: 10px solid transparent;
    border-left-color: #ffd800;
}

@media (max-width:460px){ 
    .timeline-article.content-left-container .content-box{
        left: -10px;
    }
    .timeline-article .content-box p{
        height: 100px;
        overflow: hidden;
    }
}