@charset "utf-8";
/* CSS Document */
* {margin:0; padding:0; box-sizing: border-box;}
body {
    margin:0;
    padding:0;
    font-family:"微软雅黑","宋体";
    font-size:15px;
    color:#333333;
    width: 100%;
    background-size: contain;
    background: #8FDBD6 url("logo.jpg") 100% 0 no-repeat;
    background-size: 100%;
}
ul,li {list-style:none; margin:0; padding:0;}
a {
    text-decoration: none;
    color: #333333;
}
.clear{
    clear: both;
}
.left{
    float: left;
}
.right{
    float: right;
}
.block{
    display: block;
}
.none{
    display: none;
}
.margin_r0{
    margin-right: 0 !important;
}
.margin_bom0{
    margin-bottom: 0 !important;
}
tr,td{
    padding: 0;
    margin: 0;
}

.mt15 {
    margin-top: 15px;
}
.ml16 {
    margin-left: 16px;
}
/*nav*/
.nav{
    width: 100%;
    height: 100px;
    box-sizing: border-box;
    padding: 45px 20px 0;
}
.nav li{
    float: left;
    font-size: 22px;
    padding: 0 20px;
    background: #2487a3;
    height: 55px;
    margin-right: 19px;
}
.nav li:last-child{
    margin-right: 0;
}
.nav li>a{
    color: #fff;
    text-decoration: none;
    display: block;
    text-align: center;
    width: 100%;
    height: 55px;
    line-height: 55px;
}
.nav li:hover{
    background: #8fdbd6;
}

/*第一部分*/
.first_bt,.two_bt,.three_bt,.four_bt{
    width: 1200px;
    height: 120px;
    margin: 0 auto;
}
.first_bt>a,.two_bt>a,.three_bt>a,.four_bt>a{
    display: block;
    width: 100%;
    height: 150px;
    line-height: 120px;
    font-size: 28px;
    font-weight: 600;
    color: #007CC4;
    text-align: center;
}
.first{
    width: 100%;
    padding-bottom: 50px;
}
.first_box {
    width: 1200px;
    margin: 0 auto;
    overflow: hidden;
}
.first_left {
    width: 1200px;
    padding: 0 20px;
}


/*第二部分*/
.two{
    width: 100%;
    background: #fff;
}
.two_list_box{
    width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}
.two_list_box li{
    width: 376px;
    float: left;
    height: 280px;
    margin-right: 15px;
    background: #333;
    margin-bottom: 15px;
}
.two_list_box li:nth-child(3),.two_list_box li:nth-child(6){
    margin-right: 0;
}
.two_list_box li>a{
    display: block;
    width: 100%;
    height: 100%;
    position: relative;
}
.two_list_box li>a>img{
    width: 376px;
    height: 280px;
    position: absolute;
    left: 0;
    top: 0;
    z-index: 1;
}
.two_list_box li>a>span{
    display: block;
    width: 100%;
    height: 55px;
    background: rgba(0,0,0,0.4);
    color: #fff;
    padding: 10px;
    position: absolute;
    bottom: 0;
    left: 0;
    z-index: 10;
    word-wrap:break-word;
}
/*第三部分/第五部分*/
.three{
    width: 100%;
    background: #fff;
    padding-bottom: 30px;
}
.three_list_box{
    width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}
.three_list_box li{
    float: left;
    width: 570px;
    height: 165px;
    background: #F3F3F3;
    margin-right: 20px;
    margin-bottom: 20px;
}
.three_list_box li:nth-child(2),.three_list_box li:last-child{
    margin-right: 0;
}
.three_list_box li>a{
    display: block;
    width: 100%;
    height: 100%;
}
.three_list_box li>a>img{
    float: left;
    width: 45%;
    height: 100%;
}
.three_list_box li>a>span{
    float: left;
    width: 55%;
    height: 100%;
    padding: 20px;
    word-wrap:break-word;
    line-height: 30px;
}
/*第四部分/第六部分*/
.four{
    width: 100%;
    padding-bottom: 50px;
}
.four_list_box{
    width: 1200px;
    margin: 0 auto;
}
.four_list_box li{
    float: left;
    width: 285px;
    height: 240px;
    margin-right: 20px;
}
.four_list_box li:last-child{
    margin-right: 0;
}
.four_list_box li>a{
    display: block;
    width: 100%;
    height: 100%;
    background: #000;
}
.four_list_box li>a>img{
    float: left;
    width: 100%;
    height: 180px;
}
.four_list_box li>a>span{
    float: left;
    width: 100%;
    height: 60px;
    padding: 5px;
    line-height: 25px;
    color: #fff;
    word-wrap:break-word;
}
.top5{
    width: 1200px;
    padding: 0 20px;
}
.top5 li{
    float: left;
    width: 580px;
    height: 400px;
    margin-bottom: 20px;
    position: relative;
}
.top5 li img{
    position: relative;
    width: 580px;
    height: 400px;
    left: 0;
    top: 0;
    z-index: 10;
}
.top5 li span{
    position: absolute;
    width: 580px;
    height: 400px;
    left: 0;
    top: 0;
    z-index: 100;
    background: rgba(0,0,0,0.8);
    color: #fff;
    padding: 185px 15px 0 15px;
    text-align: center;
    font-weight: 600;
    box-sizing: border-box;
    transition: 0.5s;
    display: none;
}

/*媒体查询*/
@media screen and (max-width: 1200px) {
    html{
        width: 1200px;
    }
    body {
        width: 1200px;
        background-size: contain;
        background: #8FDBD6 url("logo.jpg") no-repeat;
        background-size: 1200px;
    }
    .nav{
        width: 100%;
        height: 100px;
        padding-top: 20px;
    }
}