.header-bottom {
    height: 4.3rem;
}

.header header {
    background-color: rgba(21, 53, 178, .9);
}

.banner {
    position: relative;
    width: 100%;
    height: 31.25rem;
    padding-top: 11.25rem;
    text-align: center;
    background: url('http://static.web3di.com/img/6_pic1@2x.png') no-repeat center;
    background-size: 100% 100%;
    color: #ffffff;
}

.banner h4 {
    font-size: 3.125rem;
    color: #ffffff;
}

.play {
    margin-top: 3rem;
    margin-bottom: 5.125rem;

}

.play img {
    width: 4.375rem;
    height: 4.375rem;
}

.banner-nav {
    height: 3.125rem;
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}

.banner-nav ul {
    width: 32.25rem;
    display: flex;
    margin: 0 auto;
}

.banner-nav li {
    line-height: 3.125rem;
    width: 10.75rem;
    text-align: center;
}

.banner-nav li.avtive {
    background: linear-gradient(90deg, rgba(51, 102, 255, 1) 0%, rgba(51, 153, 254, 1) 100%);
}

.banner-nav li:hover {
    background: linear-gradient(90deg, rgba(51, 102, 255, 1) 0%, rgba(51, 153, 254, 1) 100%);
}
.news-content {
    width: 75rem;
    margin: 0 auto;
}
.news {
    padding: 2.5rem 0;
    background: #f9f9f9;
}
.news-content {
    width: 88.75rem;
    margin: 0 auto;
    display: flex;
}
.content-side{
    width:18.75rem;
    margin-right:1.25rem;
}
.content-right{
    width:18.75rem;
    margin-left:1.25rem;
}
.news-item {
    margin-bottom: 1.25rem;
    background: #ffffff;
}
.news-item>a {
    display: flex;
}
.news-item-left {
    width: 16.125rem;
}
.news-item-right {
    width: 36.735rem;
    padding: 1.25rem 1.375rem;
}
.news-item img {
    width: 16.125rem;
    height: 100%;
}
.news-item h4 {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 1.25rem;
    color: #333333;
}
.news-item p {
    margin: 1.25rem 0;
    font-size: 1rem;
    color: #666666; 
    text-overflow: -o-ellipsis-lastline;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
}
.news-bottom {
    display: flex;
}
.news-time {
    flex: 6;
    font-size: 1rem;
    color: #999999;
}
.news-more {
    text-align: right;
    font-size: .875rem;
    color: #3385FF;
}
.pagination{
    margin:0;
}
.recommend-content{
    margin-top:1.25rem;
}
@media screen and (max-width: 750px) {
    .banner {
        width: 46.875rem;
        height: 15rem;
        padding-top: 4.25rem;
    }
    .news {
        padding:2.875rem 0;
    }
    .banner h4 {
        margin-bottom: 2.25rem;
    }
    .play {
        display: none;
    }
    .banner-nav {
        height: 4.375rem;
    }
    .banner-nav ul {
        width: 100%;
        height: 4.375rem;
        line-height: 4.375rem;
    }
    .banner-nav ul li {
        width: 15.625rem;
        line-height: 4.375rem;
    }
    .news-content {
        width: 41.875rem;
    }
    .news-item {
        margin-top: 0;
    }
    .news-item-left {
        width: 16.125rem;
    }
    .news-item-left img {
        width: 16.125rem;
    }
    .news-item-right {
        width: 25.75rem;
    }
    .news-time {
        flex: 1;
    }
}