/*welocme*/
.welcome {
    width: 1200px;
    margin: 55px auto 120px;
}
.welcome .classic {
    width: 1200px;
    display: flex;
    overflow: hidden;
    justify-content: space-around;
    margin-top: 105px;
}
.classic li {
    width: 227px;
    float: left;
    text-align: center;
}
.welcome h3 {
    font-size: 20px;
    color: #333333;
    margin-top: 44px;
    font-weight: 900;
}
.welcome h4 {
    font-size: 14px;
    color: #666666;
    margin-bottom: 30px;
    font-weight: 800;
}
.welcome .classic p {
    font-size: 12px;
    color: #999999;
    line-height: 24px;
}
.pro-center {
    margin-bottom: 120px;
    position: relative;
}
.pro-list {
    width: 100%;
    overflow: hidden;
    margin-top: 50px;
}
.pro-list li {
    float: left;
    width: 16.666%;
}
.pro-list li img{
    width: 100%;
}
.pro-list li:hover .pro-title {
    background-color: #01a1ff;
    color: white;
}
.pro-list li:hover .pro-title .add {
    background-color: #ffffff;
    color: #01a1ff;
}
.pro-center .pro-title {
    height: 52px;
    display: block;
    background-color: #e5e5e5;
    line-height: 52px;
    font-size: 14px;
    color: #333;
    position: relative;
    margin-top: -2px;
}
.pro-center .pro-title span:first-child {
    padding-left: 20px;
}
.pro-center .pro-title span.add {
    position: absolute;
    width: 15px;
    height: 15px;
    line-height: 15px;
    display: block;
    background-color: #999999;
    border-radius: 50%;
    top: 17.5px;
    right: 15px;
    color: white;
    text-align: center;
}
.pro-center .prev{
    top: 270px;
    left: 270px;
}
.pro-center .next{
    top: 270px;
    right: 270px;
}
/*news center*/
.news-center {
    width: 1200px;
    margin: 0 auto 120px;
}
.news-center .news-show {
    margin-top: 50px;
    overflow: hidden;
}
.news-left {
    float: left;
    position: relative;
}
.news-left p {
    width: 553px;
    line-height: 37px;
    position: absolute;
    font-size: 18px;
    color: white;
    background-color: #01a1ff;
    bottom: 5px;
    left: 0;
    padding-left: 10px;
    box-sizing: border-box;/*让盒子宽度始终为固定宽度，不会因为padding影响到最终宽度*/
}
.news-left li {
    width: 110.5px;
    height: 5px;
    float: left;
    background-color: white;
    margin-top: -2px;
}
.news-left .news-active {
    background-color: #01a1ff;
}
.news-right {
    width: 605px;
    float: right;
}
.news-detali {
    overflow: hidden;
}
.news-date {
    float: left;
    margin-right: 10px;
    display: block;
}
.news-date span:first-child {
    display: block;/*行级标签span不能设置宽高，此条代码让行级标签span变为块级标签，则可以设置宽高*/
    width: 70px;
    line-height: 57px;
    text-align: center;
    border: 1px solid #01a1ff;
    font-size: 40px;
    color: #01a1ff;
    box-sizing: border-box;
}
.news-date span:last-child {
    display: block;
    font-size: 14px;
    width: 70px;
    line-height: 20px;
     background-color: #01a1ff;
    color: white;
     text-align: center;
 }
.news-content {
    float: left;
    width: 523px;
    margin-bottom: 10px;
    display: block;
}
.news-content .h2 {
    font-size: 18px;
    color: #01a1ff;
    margin-top: 10px;
    display: block;
    font-weight: 900;/*文字加粗*/
}
.news-content .p {
    font-size: 12px;
    color: #999999;
    display: block;
    line-height: 20px;/*行高*/
    margin-top: 15px;
}
.clear {
    clear: both;
}
.news-list {
    font-size: 14px;
    color: #666666;
    position: relative;
}
.news-list li {
    padding: 13px 0 10px;
    border-top: 1px dotted #cccccc;/*dotted点虚线*/
}
.news-list li:last-child {
    border-bottom: 1px dotted #cccccc;/*dotted点虚线*/
}
.news-list i {
    font-weight: 900;/*给那个点加粗，让他变大，变明显些*/
    margin-right: 10px;
}
.news-list small {
    font-size: 12px;
    position: absolute;
    right: 0;
}
/*video center*/
.video-center {
    width: 1200px;
    margin: 0 auto;
    position: relative;
}
.video-list {
    margin: 54px 0 144px;
    overflow: hidden;
    padding: 4px;
}
.video-list li {
    float: left;
    width: 252px;
    margin-right: 53px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.video-list li:last-child {
    margin-right: auto;
}
.video-list img {
    width: 260px;
    height: 195px;
    display: block;
}
.video-list .play {
    width: 45px;
    height: 45px;
    display: block;
    border: 3px solid #ffffff;
    background-color: rgba(0,0,0,0.5);/*0.5不透明度*/
    border-radius: 50%;
    position: absolute;
    left: 102px;
    top: 75px;
}
.video-list .play:after {/*画三角形*/
    content: '';/*先设置内容为空*/
    display: block;/*变为块级标签，使后面的15px可以生效*/
    border: 15px solid transparent;/*因为没有内容所以边框线是一个边长为30px的正方形*/
    border-left-color: white;/*边框线设置为透明的，左边设为白色，正方形是由上下左右四个等腰直角三角形组成，所以是一个白色的三角形*/
    position: absolute;/*给这个三角形定位*/
    left: 18px;
    top: 8px;
}
.video-list .video-title {
    margin: 25px 0 10px;
    color: #000000;
    font-size: 16px;
    display: block;
}
.video-list .video-desc {
    font-size: 12px;
    color: #333333;
    display: block;
    margin-bottom: 25px;
}
.video-list li:hover .video-title {
    color: #01a1ff;
    font-weight: bold;/*文字加粗*/
}
.video-list li:hover {
    box-shadow: 3px 3px 3px #01a1ff,-3px -3px 3px #01a1ff;
}
.video-list li:hover .play {
    width: 54px;
    height: 54px;
    border: 3px solid #01a1ff;
    background-color: rgba(255,255,255,0.5);
    left: 100px;
    top: 73px;
}
.video-list li:hover .play:after {
    border-left-color: #01a1ff;
    left: 21px;
    top: 11px;
}
.video-center .prev {
    left: -50px;
    top: 260px;
}
.video-center .next {
    right: -22px;
    top: 270px;
}