.video {
    width: 100%;
    display: flex;
    justify-content: left;
    flex-wrap: wrap;
}
.video-item {
    width: calc(25% - 15px);
    margin-right: 20px;
    background-color: #ffffff;
    box-shadow: 0px 0px 10px 0px rgba(66, 117, 255, 0.2);
    transition: all 0.3s ease-out;
}
.video-item:hover {
    transform: scale(1.01);
}
.video .video-item:nth-child(4n) {
    margin-right: 0;
}
.video-img {
    display: block;
    width: 100%;
    position: relative;
    padding-bottom: 56.25%;
}
.video-img img {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.video-img .iconfont {
    width: 55px;
    height: 55px;
    color: #FFFFFF;
    background: rgba(0, 0, 0, 0.4);
    text-align: center;
    line-height: 55px;
    border-radius: 50%;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    font-size: 20px;
}
.video-title {
    padding: 18px 10px;
    padding-left: 20px;
    color: #333333;
    font-weight: bold;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-size: 16px;
}
@media screen and (max-width: 550px){
    .video-item {
        width: 100%;
        margin-right: 0;
        margin-bottom: 15px;
    }
}