.video-list {
    margin: 0 -10px;
}

.video-list li:nth-child(4n+1) {
    clear: left;
}

.video-list li {
    width: calc((100% / 4) - 0.1px);
    padding: 0 10px 35px;
}

.video-list .box {
    transition: all .2s;
    padding: 12px;
    background: #fdfdfd;
    border: 3px solid #efefef;
    box-sizing: border-box;
    margin: 0 auto;
    position: relative;
}
.video-list .box .cover{
    font-size: 0;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    width: 100%;
    height: 100%;
    z-index:30;
}
.video-list .pic {
    position: relative;
    overflow: hidden;
    margin-bottom: 10px;
height: 0;
    padding-bottom: 75%;
}
.video-list .pic img{
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    object-fit: cover;
}

.video-list .pic img {
    width: 100%;
}

.video-list .pic:before {
    content: '';
    display: block;
    background: rgba(255, 255, 255, 0.3);
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    opacity: 0;
    -webkit-transition: all 0.3s;
    -o-transition: all 0.3s;
    transition: all 0.3s;
}

.video-list .box:hover .pic:before {
    opacity: 1;
}

.video-list .txt {
    padding: 3px 0px 5px 0;
    position: relative;
}

.video-list .name  {
    font-size: 18px;
    white-space: nowrap;
    -ms-text-overflow: ellipsis;
    text-overflow: ellipsis;
    overflow: hidden;
    max-height: 30px;
    margin-bottom: 5px;
}

.video-list .more_box {
    min-height: 60px;
    position: relative;
    width: 100%;
    margin: 0px auto;
    background: #fdfdfd;
    border-top: none;
    box-sizing: border-box;
    padding: 15px 0px;
}

.video-list .more {
    color: #000;
    font-family: 'Roboto', sans-serif;
    cursor: pointer;
    display: block;
    font-size: 13px;
    font-weight: 400;
    line-height: 40px;
    margin: 1em auto 2em;
    text-decoration: none;
    text-transform: uppercase;
    vertical-align: middle;
    width: 100%;
    position: absolute;
    right: 0;
    top: 0;
}

.video-list .more {
    color: #000;
    font-family: 'Roboto', sans-serif;
    text-align: center;
}

.video-list .more svg {
    height: 40px;
    left: 0;
    right: 0;
    margin: auto;
    position: absolute;
    top: 0;
    width: 100%;
}

.video-list .more rect {
    fill: none;
    stroke: #000000;
    stroke-width: 1px;
    stroke-dasharray: 422, 0;
}

.video-list li:hover .more {
    background: rgba(225, 51, 45, 0);
    letter-spacing: 4px;
    transition: all 0.2s;
}

.video-list li:hover .more rect {
    stroke: #009FE8;
    stroke-width: 3;
    stroke-dasharray: 24, 512;
    stroke-dashoffset: 619;
    -webkit-transition: all 1.35s cubic-bezier(0.19, 1, 0.22, 1);
    transition: all 1.35s cubic-bezier(0.19, 1, 0.22, 1);
}

.video-detail {
    margin: 0 auto;
}

.video-detail .title {
    text-align: center;
    font-size: 18px;
    font-weight: bold;
    margin: 0 0 14px;
    /*border-bottom: 1px solid #ddd;*/
    padding-bottom: 10px;
}

.video-detail .pic {
    margin-bottom: 20px;
    
    margin: 0 auto 30px;
    padding: 30px;
}

.video-detail .btn-box {
    padding-top: 30px;
    text-align: center;
}

.video-detail .pic iframe {
     width: 100%;
    height: 480px;
    max-width: 840px;
    margin:auto;
    position:relative;
}
.video-detail .pic .youtubecontent{
    height:auto;
    padding:10px;
}
.content-top {
    display: none;
}

@media screen and (max-width: 1259px) {

    .video-list .more_box {
        padding: 0 0px 0;
    }
}


@media screen and (max-width: 1000px) {
    .video-list li {
        width: 50%;
    }
    .video-list li:nth-child(4n+1) {
        clear: none;
    }
    .video-list li:nth-child(3n+1) {
        clear: none;
    }
    .video-list li:nth-child(2n+1) {
        clear: left;
    }
    .video-list .more {
        position: relative;
        display: block;
        margin: 0 auto;
    }
    .video-detail .btn-box {
        padding-top: 20px;
    }
    .video-detail .title {
    border-bottom: 1px solid #ddd;
    }

}

@media screen and (max-width: 767px) {
    .video-list .txt {
        padding: 0;
    }
    .video-list li:hover .more rect {
        stroke-dasharray: 24, 480;
    }
    .video-list .more_box {
        padding: 0 0px 0;
        margin: 10px 0 -10px;
    }
     .video-detail .pic iframe{
        height: 420px;
    }
    .video-detail .pic{
    padding:0px;
    margin-bottom: 20px;
}
}

@media screen and (max-width: 600px) {
    .video-list {
        margin: 0;
    }
    .video-list li {
        width: 100%;
        padding: 0 0 25px;
    }
    .keyword_box li {
        padding: 0;
    }

    .video-detail .pic {
        padding: 0;
        margin: 0px;
    }
    .video-detail .pic .youtubecontent{
    padding:10px 0px;
}
     .video-detail .pic iframe{
        height: 360px;
    }
}

@media screen and (max-width: 400px) {
    .fb {
        width: 180px;
        overflow: hidden;
    }
     .video-detail .pic iframe{
        height: 220px;
    }
}

@media screen and (max-width: 338px) {

    .video-list .more {
        margin: 16px auto -10px;
    }
}