header{
    height: 74px;
}
.img-box{
    width: 100%;
    height: 100%;
    position: fixed;
    top: 0;
    left: 0;
}
.search-box{
    width: 820px;
}
.input-search{
    width: 700px;
    height: 50px;
    line-height: 50px;
    font-size: 16px;
    color: #545454;
    border-top-left-radius: 3px;
    border-bottom-left-radius: 3px;
    border: none;
    padding: 0 15px;
    float: left;
}
.btn-search{
    width: 120px;
    height: 50px;
    line-height: 50px;
    font-size: 20px;
    background: #39d8bc;
    border-top-right-radius: 3px;
    border-bottom-right-radius: 3px;
    text-align: center;
    float: left;
    transition: all .2s;
}
.btn-search:hover{
    background: #2aad96;
    transition: all .2s;
}
.icon-search{
    width: 120px;
    height: 50px;
    line-height: 50px;
    font-size: 18px;
    color: #fff;
}
.center-box{
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-120%);
}
.text-box{
    line-height: 40px;
    font-size: 34px;
    color: #00c5a3;
    letter-spacing: 3px;
    text-align: center;
    padding-bottom: 20px;
}
.qrcode-box{
    padding: 20px;
    position: fixed;
    bottom: 0;
    right: 0;
}
.qrcode-box img{
    width: 150px;
    height: 150px;
}
.qrcode-box h2{
    line-height: 36px;
    font-size: 15px;
    color: #fff;
    background: rgba(0,0,0,.5);
    text-align: center;
}


.video-box{
    width: 100%;
    height: calc(100vh - 74px);
    overflow: hidden;
}
.video-box video{
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.btn-box{
    display: flex;
    display: -webkit-flex;
    position: absolute;
    top: 50%;
    left: 50%;
    margin-top: -30px;
    margin-left: -198px;
}
.btn-box a{
    line-height: 20px;
    font-size: 18px;
    color: #fff;
    background: #39d8bc;
    box-shadow: 0 0 12px 2px rgba(57,216,188,.3);
    border-radius: 40px;
    letter-spacing: 4px;
    margin: 0 20px;
    padding: 20px 35px;
    transition: all .2s;
}
.btn-box a:hover{
    background: #06af91;
    transition: all .2s;
}