.banner h1,.banner p{
    color:#fff;
}
.relative-box{
    position:relative;
}
.tab-control{
    border-bottom:1px solid rgba(0,0,0,0.1);
    display:flex;
    align-items:stretch;
    justify-content:center;
    flex-direction:row;
    position:sticky;
    top:0;
    width:100%;
    background-color:#fff;
    transition:transform 0.5s;
    z-index:2;
    overflow-x:auto;
}
.tab-control.down{
    transform:translateY(6.75em);
}
.tab-control a{
    display:block;
    font-size:1.5em;
    height:3.125em;
    line-height:3.125;
    margin-right:2.6em;
}
.tab-control a:last-child{
    margin-right:0;
}
.tab-control a.active{
    color:var(--theme-purple);
}

.sec1{
    text-align:center;
    padding:6.77% 0 12%;
}
.sec1 .inner{
    width:1220px;
}
.sec1 h4{
    font-size:1.625em;
    color:var(--theme-yellow);
    margin-bottom:2em;
}
.sec1 h4 span{
    margin-right:7.4em;
}
.sec1 h4 span:last-child{
    margin-right:0;
}
.sec1 h3{
    font-size:8em;
    color:var(--theme-purple);
}
.sec1 .line{
    height:1px;
    background-color:#000;
    opacity:0.1;
    margin:10.7% 0 8.4%;
}
.sec1 h5{
    font-size:3em;
    color:#333;
    margin-bottom:1em;
}
.sec1 p{
    text-align:left;
    font-size:1.625em;
    color:#333;
    line-height:1.6;
    margin-bottom:0.4em;
}
.sec1 p:last-child{
    margin-bottom:0;
}
.sec1 .video-box{
    position:relative;
    margin-top:6.23%;
}
.sec1 .video-box::before{
    content:"";
    display:block;
    position:absolute;
    left:0;
    top:0;
    width:100%;
    height:100%;
    background-color:#000;
    opacity:0.7;
}
.sec1 .video-box.play::before{
    opacity:0;
    pointer-events:none;
}
.sec1 video{
    object-fit:cover;
}
.sec1 .video-box svg{
    width:4.625em;
    fill:rgba(255, 255, 255, 0.75);
    position:absolute;
    left:50%;
    top:50%;
    z-index:1;
    margin-left:-2.3125em;
    margin-top:-2.3125em;
    cursor:pointer;
}
.sec1 .video-box.play svg{
    opacity:0;
    pointer-events:none;
}



.sec2{
    background-color:#e4e5e7;
    padding:8.85% 0;
    color:#333;
}
.sec2 .inner{
    width:1220px;
}
.sec2 ul{
    margin-bottom:5.4%;
    display:flex;
    align-items:center;
    justify-content:space-between;
    flex-direction:row;
}
.sec2 ul:nth-child(even){
    flex-direction:row-reverse;
}
.sec2 ul:last-child{
    margin-bottom:0;
}
.sec2 li{
    width:46.72%;
}
.sec2 li.all{
    width:100%;
}
.sec2 h5{
    font-size:3em;
    margin-bottom:0.67em;
}
.sec2 h5.ta-c{
    text-align:center;
}
.sec2 p{
    font-size:1.625em;
    line-height:1.54;
}
.sec2 .swiper-pagination{
    bottom:5%;
}
.sec2 .swiper-pagination .swiper-pagination-bullet{
    width:0.5em;
    height:0.5em;
    background-color:#fff;
    opacity:0.3;
    border-radius:0.25em;
    margin:0 0.25em;
}
.sec2 .swiper-pagination .swiper-pagination-bullet.swiper-pagination-bullet-active{
    opacity:1;
    width:1.375em;
}


.sec3{
    padding:7.3% 0 11.46%;
    background-repeat:no-repeat;
    background-image:url(../images/about_sec3_bg.jpg);
    background-position:center center;
    background-size:cover;
}
.sec3 h3{
    font-size:3em;
    color:#333;
    margin-bottom:5.4%;
    text-align:center;
}
.sec3 .relative-box{
    position:relative;
}
.sec3 .img-box{
    width:41.18%;
    margin:0 auto;
}
.sec3 ul{
    position:absolute;
    left:0;
    top:0;
    width:100%;
}
.sec3 li{
    width:29.4%;
    float:left;
    clear:left;
    opacity:0;
    transition:transform 0.75s,opacity 0.75s;
}
.sec3 li:nth-child(even){
    float:right;
    clear:right;
}
.sec3 li .line{
    display:block;
    width:10.875em;
    height:0.3125em;
    background-color:var(--theme-yellow);
    margin-bottom:1.75em;
}
.sec3 li:nth-child(1),.sec3 li:nth-child(2){
    height:19em;    
}
.sec3 h5{
    font-size:2em;
    color:#333;
    line-height:1.5;
}
.sec3 p{
    font-size:1.5em;
    color:#333;
    line-height:1.5;
}


.sec4 li{
    color:#fff;
    position:relative;
}
.sec4 .inner{
    position:absolute;
    left:0;
    right:0;
    bottom:10%;
}
.sec4 h5{
    font-size:3em;
    margin-bottom:0.75em;
}
.sec4 p{
    font-size:2.5em;
    line-height:1.5;
    width:58%;
}
@media only screen and (min-width:1025px){
    .tab-control a:hover{
        color:var(--theme-purple);
    }
    .sec3 li{
        transition-delay:0.5s,0.5s;
    }
    .sec3 li:nth-child(odd){
        transform:translate(-50vw,0);
    }
    .sec3 li:nth-child(even){
        transform:translate(50vw,0);
    }
    .sec3 .relative-box.actived li{
        transform:translate(0,0);
        opacity:1;
    }
}
@media only screen and (max-width:1024px){
    .tab-control{
        justify-content:flex-start;
        padding:0 5%;
    }
    .tab-control.down{
        transform:translateY(8.5em);
    }
    .tab-control a{
        font-size:1.875em;
        white-space:nowrap;
    }

    .section{
        font-size:1.25em;
    }

    .sec1{
        padding:10% 0 15%;
    }


    .sec2{
        padding:15% 0;
    }
    .sec2 ul{
        margin-bottom:15%;
        display:block;
    }
    .sec2 li{
        width:100%;
    }
    .sec2 li:first-child{
       margin-bottom:10%;
    }


    .sec3{
        padding:15% 0 20%;
    }
    .sec3 h3{
        margin-bottom:10%;
    }
    .sec3 .img-box{
        width:100%;
        margin-bottom:10%;
    }
    .sec3 ul{
        position:static;
    }
    .sec3 li{
        width:100%;
        float:none;
        margin-bottom:10%;
        transform:translate(0,20vh);
    }
    .sec3 li.actived{
        transform:translate(0,0);
        opacity:1;
    }
    .sec3 li:nth-child(even){
        float:none;
    }
    .sec3 li:last-child{
        margin-bottom:0;
    }
    .sec3 li:nth-child(1),.sec3 li:nth-child(2){
        height:auto;    
    }
    .sec3 li .line{
        margin-top:1em;
        margin-bottom:1em;
    }

    .sec4 li{
        padding:30% 0 7.5%;
    }
    .sec4 li img{
        position:absolute;
        left:50%;
        top:0;
        height:100%;
        width:auto;
        transform:translateX(-50%);   
    }
    .sec4 .inner{
        position:static;
    }
    .sec4 h5{
        margin-bottom:0.5em;
    }
    .sec4 p{
        font-size:1.5em;
        width:100%;
    }
}