.about{
    margin-bottom: 1.5rem;
}
.about .exp{
    font-size: 1.05rem;
    color: #383838;
    line-height: 1.6;
    margin-left: 1.5rem;
    margin-right: 1.5rem;
    margin-top: -3.5rem;
    position: relative;
    padding:1rem;
    border-radius: .3rem;
    background: #fff;
    box-shadow: .25rem .25rem 1rem rgba(0,0,0,.15);
}
.about-video{
    position: relative;
}
.about-video .about-video-icon{
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0,0,0,.15);
    display: flex;
    justify-content: center;
    align-items: center;
}
.about-video .about-video-icon i{
    font-size: 8rem !important;
    color: #fff;
    font-weight: normal;
}
.about-history{
    padding: 1rem;
    height: 30rem;
    width: 100%;
    background: #f8f8f8;
    overflow-x: hidden;
    overflow-y: scroll;
    position: relative;
}
.timeline .timeline-item{
    padding-left: 2rem;
    position: relative;
}
.timeline .timeline-item:before{
    content: '\f1db';
    font-size: 1.4rem !important;
    top: .85rem;
    color: #666;
}
.timeline .timeline-content dd:before{
    content: "\f07b";
    font-size: 1rem !important;
    top: .5rem;
}
.timeline .timeline-item:before,.timeline .timeline-content dd:before{
    font: normal normal normal 14px/1 FontAwesome;
    position: absolute;
    left: 0;
}
.timeline .timeline-item:after{
    content: '';
    position: absolute;
    top: 2.25rem;
    left: .5rem;
    bottom: -.75rem;
    border-left: 1px solid #E6E6E6;
}
.timeline .timeline-item:last-child:after{
    content: none;
}
.timeline .timeline-item dt{
    font-size: 2rem;
    font-weight: 600;
    line-height: 3rem;
    list-style-type:upper-roman;
}
.timeline .timeline-item dd{
    padding-left: 1.5rem;
    font-size: 1rem;
    line-height: 2rem;
    color: #666;
    position: relative;
}
.about-major{
    position: relative;
    height: 21.5rem;
    padding-top: 1rem;
    padding-bottom: 1rem;
    background: url(https://xjwtm.oss-cn-beijing.aliyuncs.com/about/logo.png) center center no-repeat;
    overflow: hidden;
}
.about-major .major-content{
    position: relative;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}
.major-content li{
    font-size: 1rem;
    height: 2.5rem;
    line-height: 2.5rem;
    width: 50%;
    position: absolute;
    transform-origin: 50% 50%;
}
.major-content li:nth-child(2n){
    text-align: right;
}
.major-content li:nth-child(1){
    top: 0;
    left: 3rem;
    animation: scrollsize 1.2s linear 1.2s infinite alternate both;
}
.major-content li:nth-child(2){
    top: 0;
    right: 3rem;
    animation: scrollsize 1.4s linear .4s infinite alternate both;
}
.major-content li:nth-child(3){
    top: 3rem;
    left: 3rem;
    animation: scrollsize 2s linear .8s infinite alternate both;
}
.major-content li:nth-child(4){
    top: 3rem;
    right: 3rem;
    animation: scrollsize 2s linear 1.8s infinite alternate both;
}
.major-content li:nth-child(5){
    top: 6rem;
    left: 3rem;
    animation: scrollsize 2s linear 2s infinite alternate both;
}
.major-content li:nth-child(6){
    top: 6rem;
    right: 3rem;
    animation: scrollsize 2s linear .2s infinite alternate both;
}
.major-content li:nth-child(7){
    top: 9rem;
    left: 3rem;
    animation: scrollsize 1.5s linear 1.6s infinite alternate both;
}
.major-content li:nth-child(8){
    top: 9rem;
    right: 3rem;
    animation: scrollsize 2s linear 1.4s infinite alternate both;
}
.major-content li:nth-child(9){
    top: 12rem;
    left: 3rem;
    animation: scrollsize 2s linear .6s infinite alternate both;
}
.major-content li:nth-child(10){
    top: 12rem;
    right: 3rem;
    animation: scrollsize 2s linear 1s infinite alternate both;
}
.major-content li:nth-child(11){
    top: 15rem;
    left: 3rem;
    animation: scrollsize 2s linear .2s infinite alternate both;
}
.major-content li:nth-child(12){
    top: 15rem;
    right: 3rem;
    animation: scrollsize 2s linear 1.4s infinite alternate both;
}
.major-content li:nth-child(13){
    top: 18rem;
    left: 3rem;
    animation: scrollsize 1.6s linear .6s infinite alternate both;
}
.major-content li:nth-child(14){
    top: 18rem;
    right: 3rem;
    animation: scrollsize 2s linear 1.8s infinite alternate both;
}
@keyframes scrollsize{
    0% {
        color: #E72A0F;
        transform: scale(1);
        transform-origin: 50% 50%;
    }
    20% {
        color: #E72A0F;
    }
    50% {
        color: #0380C9;
        transform: scale(1.25);
        transform-origin: 50% 50%;
    }
    100% {
        color: #0380C9;
        transform: scale(1.5);
        transform-origin: 50% 50%;
    }
}