.video-list {
    margin: 0 -20px;
}
.video-list .item {
    width: 25%;
    padding: 0 20px;
}
.video-list .item:nth-child(4n+1) {
    clear: left;
}
.video-list .box {
    max-width: 330px;
    margin: 0 auto 50px;
    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: 14px;
}
.video-list .txt {
    position: relative;
    line-height: 1.5;
}
.video-list .name {
    position: relative;
    color: #333333;
    font-size: 18px;
    font-weight: normal;
    letter-spacing: 1px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    height: 24px;
    margin: 0 0 8px 0;
    transition: all .5s;
}
.video-list .box:hover .name {
    color: #52A9A4;
}
.video-list .description {
    position: relative;
    box-sizing: border-box;
    color: #535353;
    font-size: 14px;
    letter-spacing: 0.8px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    height: 45px;
}
.video-list .more {
    position: relative;
    box-sizing: border-box;
    display: block;
    width: 100px;
    color: #555555;
    font-size: 15px;
    text-align: center;
    letter-spacing: 1.9px;
    line-height: 30px;
    border-bottom: 2px solid #52A9A4;
    margin: 20px auto 0;
    font-family: 'Cormorant Garamond', serif;
    transition: all .5s ease;
}
.video-list .box:hover .more {
    border-bottom-color: rgb(82, 169, 164, 0.3);
    color: #52A9A4;
}
.video-header {
    max-width: 1000px;
    margin: 0 auto;
}
.video-header .title {
    color: #333;
    font-size: 23px;
    font-weight: normal;
    letter-spacing: 1px;
    line-height: 1.4;
    padding: 0 0 16px;
    border-bottom: 1px solid #ddd;
    margin: 0 auto 32px;
    text-align: center;
}
.video-detail .video_box{
    padding: 0 0 32px;
    border-bottom: 1px solid #ddd;
    margin: 0 auto 24px;
}
.video-detail .title {
    color: #fff;
    border: 1px solid #52A9A4;
    background: #52A9A4;
    width: 135px;
    height: 35px;
    letter-spacing: 1.5px;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    border-radius: 0;
    margin: 0 auto 32px;
    font-family: 'Cormorant Garamond', serif;
}
.video-detail{
    max-width: 1000px;
    margin: 0 auto;
}
@media screen and (max-width: 1300px) {
    .video-list {
        margin: 0 -7px;
    }
    .video-list .item {
        padding: 0 7px;
    }
}
@media screen and (max-width: 1000px) {
    .video-list .name{
        font-size: 16px;
        margin: 0 0 4px 0;
    }
    .video-list .item {
        width: 50%;
    }
    .video-list .item:nth-child(4n+1) {
        clear: none;
    }
    .video-list .item:nth-child(2n+1) {
        clear: left;
    }
    .video-header .title{
        font-size: 18px;
        margin-bottom: 24px;
    }
    .video-detail .video_box {
        padding: 0 0 24px;
        border-bottom: 1px solid #ddd;
        margin: 0 auto 24px;
    }
    .video-detail .title {
        height: auto;
        margin: 0 auto 16px;
    }
}
@media screen and (max-width: 767px) {
    .video-list .box {
        margin-bottom: 30px;
    }
}
@media screen and (max-width: 580px) {
    .video-list .item {
        width: 100%;
    }
    .video-list .item:nth-child(n) {
        clear: none;
    }
}