.main-timeline{
    width: 100%;
    margin: 20px auto;
    position: relative;
}
.main-timeline:before{
    content: "";
    display: block;
    width: 2px;
    height: 100%;
    background: #ccc;
    margin: 0 0 0 -1px;
    position: absolute;
    top: 0;
    left: 50%;
}
.main-timeline .timeline{
    width: 100%;
    margin-bottom: 20px;
    position: relative;
}
.main-timeline .timeline:after{
    content: "";
    display: block;
    clear: both;
}
.main-timeline .timeline-content{
    width: 40%;
    float: left;
    border-radius: 6px;
    border:1px solid #ddd;

}
.main-timeline .timeline:nth-child(2n+2) .timeline-content{
    float: right;
}
.main-timeline .date{
    display: block;
    width: 60px;
    height: 60px;
    line-height: 60px;
    border-radius: 50%;
    background: #25303b;
    margin: 0 0 0 -30px;
    position: absolute;
    top: 0;
    left: 50%;
    font-weight: 900;
    text-transform: uppercase;
    color: #ccb17a;
    border: 2px solid #ccb17a;
}
.main-timeline .item{padding:20px;}
.main-timeline .title{
    font-size: 16px; color: #ccb17a;
    margin-bottom: 15px;
    border-bottom: 1px solid #ccc;padding-bottom: 10px
}
.main-timeline .title span{ border-left: 2px solid #ccb17a;padding-left:15px;}

.main-timeline .jiantou{
    position: relative;width: 100%;height: 100%;
}
.main-timeline .jiantou:before{
    content: "";
    position: absolute;
    top: 20px;
    border-left:15px solid #ccc;
    border-top:15px solid transparent;
    border-bottom:15px solid transparent;
}
.main-timeline .jiantou:after{
    content: "";
    position: absolute;
    top: 21px;
    border-left:13px solid #fff;
    border-top:13px solid transparent;
    border-bottom:13px solid transparent;
}

.main-timeline .timeline:nth-child(2n+1) .jiantou:before{
    right: -15px;
}
.main-timeline .timeline:nth-child(2n+1) .jiantou:after{
    right: -13px;
}
.main-timeline .timeline:nth-child(2n+2) .jiantou:before{
    left: -15px;border-left:none;border-right:15px solid #ccc;
}
.main-timeline .timeline:nth-child(2n+2) .jiantou:after{
    left: -12px;border-left:none;border-right:12px solid #fff;
}

.main-timeline .description{
    color: #666;line-height: 22px
}
.main-timeline .imgcon{width: 140px;height: 90px;overflow: hidden;float: right;padding:0 0 15px 15px;}