.help-content .global {
    width: 100%;
    min-height: 800px;
    background: #fff;
    margin-left: 0;
    padding: 0;
}

.help-content .wrap {
    display: flex;
    margin-top: 30px;
}

.video-box .poster {
    display: block;
    width: 100%;
    height: 100%;
    -o-object-fit: cover;
    object-fit: cover
}

.video-second-body {
    width: 100%;
    min-width: 1000px;
    min-height: 600px
}

.video-second-body .video-class-box {
    margin: 0 auto;
    padding-bottom: 40px;
    min-width: 960px;
    width: 1200px
}

.video-second-body .video-class-box .video-class-banner {
    display: block;
    width: 100%
}

.video-second-body .video-class-box .video-class-title {
    display: block;
    margin: 42px 0 24px;
    font-size: 24px;
    font-weight: 700
}

.video-second-body .video-class-box .video-class-list {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
    width: 100%
}

@-webkit-keyframes video-in {
    from {
        left: 80px;
        opacity: 0
    }
    to {
        left: 0;
        opacity: 1
    }
}

@keyframes video-in {
    from {
        left: 80px;
        opacity: 0
    }
    to {
        left: 0;
        opacity: 1
    }
}

.video-second-body .video-class-box .video-class-list .video-class-item {
    position: relative;
    top: 0;
    left: 0;
    margin-bottom: 24px;
    width: 389px;
    opacity: 0;
    -webkit-animation-name: video-in;
    animation-name: video-in;
    -webkit-animation-duration: .6s;
    animation-duration: .6s;
    -webkit-animation-delay: 0s;
    animation-delay: 0s;
    -webkit-animation-timing-function: ease-out;
    animation-timing-function: ease-out;
    -webkit-animation-fill-mode: forwards;
    animation-fill-mode: forwards
}

.video-second-body .video-class-box .video-class-list .video-class-item .video-box {
    position: relative;
    width: 100%;
    height: 219px
}

.video-second-body .video-class-box .video-class-list .video-class-item .video-box .poster {
    display: block;
    width: 100%;
    height: 100%;
    -o-object-fit: cover;
    object-fit: cover
}

.video-second-body .video-class-box .video-class-list .video-class-item .video-box .share {
    display: none;
    position: absolute;
    top: 5px;
    left: auto;
    right: 10px;
    font-size: 32px;
    color: #fff;
    cursor: copy
}

.video-second-body .video-class-box .video-class-list .video-class-item .video-box .play {
    display: none;
    position: absolute;
    left: calc(50% - 27px);
    top: calc(50% - 27px);
    font-size: 54px;
    color: #fff;
    cursor: pointer
}

.video-second-body .video-class-box .video-class-list .video-class-item .video-box:hover .play, .video-second-body .video-class-box .video-class-list .video-class-item .video-box:hover .share {
    display: block
}

.video-second-body .video-class-box .video-class-list .video-class-item .video-title {
    display: -webkit-box;
    margin: 8px 0;
    max-height: 46px;
    line-height: 24px;
    color: #000;
    font-size: 16px;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden
}

.video-second-body .video-class-box .video-class-list .video-class-item .video-info {
    display: -webkit-box;
    color: #999;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden
}

.video-second-body .video-class-box .video-class-list .video-class-item:nth-child(3n-1) {
    margin-left: calc(33px / 2);
    -webkit-animation-delay: .2s;
    animation-delay: .2s
}

.video-second-body .video-class-box .video-class-list .video-class-item:nth-child(3n) {
    margin-left: calc(33px / 2);
    margin-right: 0;
    -webkit-animation-delay: .4s;
    animation-delay: .4s
}