.timeline-sfd{
    width: 100%;
    color: #222;
    position: relative;
    padding: 0;
}
.timeline-sfd::before{
    position: absolute;
    top: 0;
    left: 148px;
    z-index: 0;
    width: 4px;
    height: calc(100% - 26px);
    content: '';
    background: #f3f3f3;
}
.timeline-sfd li{
    width: 100%;
    min-height: 52px;
    box-sizing: border-box;
    position: relative;
    margin-bottom: 20px;
    overflow: hidden;
}
.timeline-sfd li:hover span{
    color: #901C1F;
    font-weight: bold;
}
.timeline-sfd li:hover i{
    background: #901C1F;
}
.timeline-sfd li:hover div{
    background: #901C1F;
    color: #fff;
}
.timeline-sfd li:hover div:after{
    border-right-color: #901C1F;
}
.timeline-sfd li span{
    width: 144px;
    display: inline-block;
    color: #b8b8b8;
    height: 52px;
    line-height: 52px;
    padding-right: 40px;
    text-align: right;
    float: left;
    font-size: 18px;
    font-weight: bold;
}
.timeline-sfd li i{
    width: 10px;
    height: 10px;
    border-radius: 5px;
    background: #B8B8B8;
    box-shadow: 0 0 0 3px #f3f3f3;
    -webkit-font-smoothing: antialiased;
    display: inline-block;
    position: absolute;
    left: 145px;
    top: 21px;
    z-index: 10;
}
.timeline-sfd li div{
    padding: 15px 20px;
    line-height: 1.4;
    position: relative;
    background: #F6F7F8;
    font-size: 16px;
    font-weight: 400;
    border-radius: 8px;
    font-family: PingFangSC-Regular, PingFang SC;
    width: calc(100% - 210px);
    float: right;
}
.timeline-sfd li div:after {
    right: 100%;
    border: solid transparent;
    content: " ";
    height: 0;
    width: 0;
    position: absolute;
    pointer-events: none;
    border-right-color: #f3f3f3;
    border-width: 10px;
    top: 18px;
}
@media (max-width: 1024px) {
    .content{
        width: 100%;
    }
    .timeline-sfd::before{
        left: 105px;
    }
    .timeline-sfd li span{
        width: 100px;
        padding-right: 0;
        text-align: center;
    }
    .timeline-sfd li i{
        left: 102px;
    }
    .timeline-sfd li div{
        width: calc(100% - 140px);
    }

}
@media (min-width: 1080px) {
    .content{
        width: 720px;
    }
}
@media (min-width: 1152px) {
    .content{
        width: 800px;
    }
}
@media (min-width: 1366px) {
    .content{
        width: 900px;
    }
}
@media (min-width: 1440px) {
    .content{
        width: 900px;
    }
}
@media (min-width: 1920px) {
    .content{
        width: 1200px;
    }
}
@media (min-width: 2160px) {
    .content{
        width: 1350px;
    }
}