.back-top{
    display: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-image: url("../static/icon/back-top.webp");
    background-size: cover;
    background-color: rgba(0,0,0,.15);
    position: fixed;
    right: 20px;
    bottom: 20px;
    cursor: pointer;
    transition: all .4s ease;
}
.back-top:hover {
    background-image: url("../static/icon/back-top-hover.webp");
    background-color: transparent;
}

.bg-box{
    width: 100%;
    min-height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-top: 120px;
    margin-top: -50px;
    background: linear-gradient(to bottom,#2d8cf0,#5cadff,#fff);
    overflow: hidden;
}
.bg-box i{
    width: 80px;
    height: 80px;
    background: rgba(255,255,255,.15);
    position: absolute;
    left: 10%;
    top: 100%;
    z-index: 1;
    animation: box-anim 20s infinite linear;
}
.bg-box i:nth-child(2){
    width: 30px;
    height: 30px;
    left: 50%;
    animation-delay: 4s;
}
.bg-box i:nth-child(3){
    left: 60px;
    animation-delay: 6s;
}
.bg-box i:nth-child(4){
    left: 30%;
    width: 100px;
    height: 100px;
    animation-delay:10s;
    transform: rotate(-60deg);
}
.bg-box i:nth-child(5){
    left: 60%;
    animation-delay: 2s;
}
.bg-box i:nth-child(6){
    left: 75%;
    width: 40px;
    height: 40px;
    animation-delay: 6s;
    border-radius: 5px;
    transform: rotate(-45deg);
}
.bg-box i:nth-child(7){
    left: 85%;
    width: 60px;
    height: 60px;
    animation-delay: 10s;
}
.bg-box i:nth-child(8){
    left: 90%;
    width: 50px;
    height: 50px;
    animation-delay: 5s;
}
@keyframes box-anim {
    0% {
        opacity: 0.5;
        top: 80%;
        transform: rotate(45deg);
    }
    25% {
        opacity: 0.75;
        top: 60%;
        transform: rotate(90deg) scale(1.1);
    }
    50% {
        opacity: 1;
        top: 40%;
        transform: rotate(135deg) scale(1.5);
    }
    75%{
        opacity: .5;
        top: 20%;
        transform: rotate(165deg) scale(1.3);
    }
    100% {
        opacity: 0;
        top: 0;
        transform:rotate(180deg);
    }
}

.title-box {
    color: #fff;
    text-align: center;
    margin-bottom: 60px;
    z-index: 2;
}
.title-box h1{
    font-size: 36px;
    font-weight: 600;
    line-height: 50px;
    padding-bottom: 10px;
}
.title-box h3{
    font-size: 18px;
    line-height: 30px;
}

.mtqr-box{
    max-width: 800px;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-around;
    z-index: 2;
}
.qr-box{
    width: 300px;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    border-radius: 10px;
    background: #fff;
    box-shadow: 0 0 5px #fff;
    margin: 10px;
}

.qr-box .title{
    width: 100%;
    color: #495060;
    font-size: 16px;
    line-height: 30px;
    text-align: left;
}
.qr-box .title small{
    color: #80848f;
}
.qr-box .qr{
    width: 180px;
    height: 180px;
    margin: 20px;
}
.qr-box .qr-msg{
    display: flex;
    flex-direction: row;
}
.qr-box .qr-msg .icon{
    width: 40px;
    height: 40px;
    margin-right: 10px;
}
.qr-box .qr-msg .title{line-height: 20px;}


.section-box{
    padding: 80px 0;
}
.section-box h1{
    text-align: center;
    font-size: 36px;
    font-weight: normal;
    color: #1c2438;
    margin: 20px 0 20px;
}
.section-box h2{
    text-align: center;
    font-size: 26px;
    font-weight: normal;
    line-height: 30px;
    color: #495060;
    margin-bottom: 40px;
}
.section-box .description{
    color: #80848f;
    font-size: 16px;
    line-height: 1.5;
    margin: 40px auto;
    padding: 0 15px;
}


.what-is-box .description{
    max-width: 700px;
    text-align: center;
}

.mt-box .description{
    max-width: 800px;
    text-indent: 2em;
}
.mt-box .mt-cell-box{
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
}
.mt-box .mt-cell-box .mt-cell{
    max-width: 300px;
    border-radius: 10px;
    box-shadow: 0 0 5px #dddee1;
    margin: 20px;
    overflow: hidden;
}
.mt-box .mt-cell-box .mt-cell .mt-cell-body{
    height: 220px;
    overflow: hidden;
}
.mt-box .mt-cell-box .mt-cell .img{width: 100%;}

.mt-box .mt-cell-box .mt-cell .mt-cell-title{
    font-size: 16px;
    line-height: 40px;
    color: #495060;
    padding: 0 20px;
}
.mt-box .mt-cell-box .mt-cell .mt-cell-content{
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 105px;
    line-height: 1.5;
    color: #80848f;
    padding: 0 20px 20px;
    text-indent: 2em;
}



.race{
    box-shadow: 0 0 20px rgb(204,204,232);
    border-radius: 15px;
    background: #fff;
}
.race .header{
    display: flex;
    flex-direction: row;
    align-items: center;
    padding: 10px 0;
}
.race .header .name{
    flex: 1;
    color: #1c2438;
    line-height: 30px;
    font-size: 16px;
    padding-left: 15px;
    border-left: 4px solid #ff606D;
}
.race .header .type{
    height: 20px;
    line-height: 20px;
    font-size: 12px;
    padding: 0 15px;
    color: #fff;
    margin: 0 15px;
    border-radius: 6px;
    background:linear-gradient(to right,#EE0979,#FF6A00);
}
.race .info-item .title,
.race .info-item .value .unit{
    font-size: 14px;
    color: #80848f;
}
.race .info-item .title{
    line-height: 30px;
}
.race .info-item .value{
    font-size: 15px;
    color: #495060;
}
.race .body{
    display: flex;
    flex-direction: row;
    padding: 10px;
    background: #f8f8ff;
}
.race .body .info-item{
    flex: 1;
    display: flex;
    flex-direction: column;
    text-align: center;
}
.race .body .info-item .value{
    display: flex;
    flex-direction: row;
    justify-content: center;
}

.race .footer{
    padding: 10px;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
}
.race .footer .info-item{
    flex: 1;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
}
.race .footer .info-item .title{padding-right: 5px;}
.race .footer .info-item .value{font-weight: bold;}
.race .footer .info-item .value .unit{
    padding-left: 5px;
    font-weight: normal;
}

.cert{
    display: flex;
    flex-direction: row;
    padding: 0 10px 0 15px;
    border-radius: 10px;
    box-shadow: 0 0 5px rgba(0,0,0,.2);
    margin: 60px 20px 20px;
}
.cert .img-box{
    flex: 2;
    position: relative;
}
.cert .img-box .img{
    width: 80%;
    height: 100px;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    color: #fff;
    background: #5cadff;
    opacity: .6;
    position: absolute;
    bottom: 10px;
}
.cert .info-box{
    flex: 3;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 15px 0 15px 15px;
}
.cert .info-box .name{
    color: #495060;
    font-size: 16px;
    margin-bottom: 20px;
}
.cert .info-box .type{
    color: #5cadff;
    align-self: flex-end;
}

.timeline-box{
    width: 100%;
    position: relative;
}
.timeline-box::before{
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    width: 6px;
    height: 100%;
    margin-left: -3px;
    border-radius: 3px;
    background: #dddee1;
}
.timeline-box .item-year,
.timeline-box .item-text,
.timeline-box .item-img{
    position: relative;
}

.timeline-box .item-year{
    height: 30px;
}
.timeline-box .year{
    width: 60px;
    height: 30px;
    line-height: 30px;
    text-align: center;
    font-weight: bold;
    color: #495060;
    border-radius: 5px;
    border: 1px solid #dddee1;
    background: #fff;
    position: absolute;
    left: 50%;
    margin-left: -30px;
    cursor: default;
}

.timeline-box .item-text,
.timeline-box .item-img{
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px 0 30px 0;
}

.timeline-box .month{
    width: 40px;
    height: 24px;
    line-height: 24px;
    text-align: center;
    position: relative;
    color: #495060;
    background: #dddee1;
    cursor: default;
    transition: all .4s ease;
}
.timeline-box .month::before,
.timeline-box .month::after{
    content: '';
    width: 0;
    height: 0;
    position: absolute;
    left: 0;
    transition: all .4s ease;
}
.timeline-box .month::before{
    border-bottom: 10px solid #dddee1;
    border-left: 20px solid transparent;
    border-right: 20px solid transparent;
    top:-10px;
}
.timeline-box .month::after{
    border-top: 10px solid #dddee1;
    border-left: 20px solid transparent;
    border-right: 20px solid transparent;
    bottom:-10px;
}
.timeline-box .item-text:hover .month,
.timeline-box .item-img:hover .month{
    color: #fff;
    background: #5cadff;
}
.timeline-box .item-text:hover .month::before,
.timeline-box .item-img:hover .month::before{
    border-bottom-color: #5cadff;
}
.timeline-box .item-text:hover .month::after,
.timeline-box .item-img:hover .month::after{
    border-top-color: #5cadff;
}

.timeline-box .item-text .detail,
.timeline-box .item-img .detail{
    max-width: 280px;
    min-height: 40px;
    line-height: 20px;
    border-radius: 8px;
    box-shadow: 0 0 1px rgba(0,0,0,.3);
    overflow: hidden;
    margin-top: -32px;
    transition: all .4s ease;
}
.timeline-box .item-text:hover .detail,
.timeline-box .item-img:hover .detail{
    box-shadow: 0 0 5px #5cadff;
}
.timeline-box .item-text .detail{
    padding: 10px;
    background: #fff;
}
.timeline-box .item-img .detail{
    width: 280px;
    height: 190px;
    background-size: cover;
    background-position: center;
}
.timeline-box .item-img .detail .text{
    padding: 10px;
    color: #fff;
    background: linear-gradient(to bottom,rgba(0,0,0,.6),transparent);
    transition: all .4s ease;
}
.timeline-box .item-text:hover .text,
.timeline-box .item-img:hover .text{
    background: linear-gradient(to bottom,rgba(0,0,0,.9),transparent);
}

.timeline-box .item-text.r .detail,
.timeline-box .item-img.r .detail{
    transform: translateX(50%);
    margin-left: 160px;
}
.timeline-box .item-text.l .detail,
.timeline-box .item-img.l .detail{
    transform: translateX(-50%);
    margin-left: -160px;
}

.history-box .feature{
    color: #5cadff;
    text-align: center;
}

@media(max-width: 768px) {
    .timeline-box .month{margin-bottom: 30px}
    .timeline-box .item-text .detail,
    .timeline-box .item-img .detail{
        margin-top: 0;
    }
    .timeline-box .item-text.r .detail,
    .timeline-box .item-img.r .detail,
    .timeline-box .item-text.l .detail,
    .timeline-box .item-img.l .detail{
        transform: translateX(0);
        margin-left: 0;
    }
}