*{
    padding:0;
    margin:0;
}
ul, li{
    list-style: none;
}
a{
    text-decoration: none;
}
.main_width{
    width: 1200px;
    margin:0 auto;
}
.head{
    position: fixed;
    top:0;
    left: 0;
    height: 90px;
    background-color: rgba(0, 0, 0, 0.5);
    width:100%;
    overflow: hidden;
    z-index: 9999;
}
.logo{
    margin-top: 10px;
    display: block;
    float: left;
}
.nav{
    float: right;
    height: 30px;
    margin-top: 30px;
}
.nav li{
    float: left;
    width: 100px;
    height: 30px;
    text-align: center;
    line-height: 30px;
    border-radius: 15px;
    margin-left: 15px;
    font-size:16px;
}
.nav li a{
    color:white;
}
.nav li:hover{
    background-color: #2b83cb;
}
.nav .focus{
    background-color: #2b83cb;
}
.top_img{
    width: 100%;
}
.top_img img{
    width: 100%;
    height: auto;
}
.title{
    width: 220px;
    height: 60px;
    background-image: url(/img/title.png);
    background-size: 220px 60px;
    background-repeat: no-repeat;
    background-position: 0 0;
    font-size: 25px;
    line-height: 60px;
    text-align: center;
    margin:0 auto;
    margin-top: 50px;
}
.title a{
    color:white;
    color:black;
}
.title2{
    background-image: url(/img/title2.png);
    color:white;
}
.title2 a{
    color:white;
}
.product_ul{
    margin-top: 50px;
}
.product_ul li{
    float: left;
    width: 30%;
    margin-left: 1.66%;
    margin-right: 1.66%;
    overflow: hidden;
    text-align: center;
}
.product_ul li div{
    width: 100%;
    height: 0;
    overflow: hidden;
    border-radius: 10px;
}
.product_ul li img{
    width: 100%;
    height: auto;
}
.product_ul li p{
    line-height: 45px;
    height: 45px;
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.product_ul li p a{
    color:#404040;
}
.blank{
    height: 50px;
    width: 100%;
    clear: both;
}
.introduce{
    width: 100%;
    background-image: url(/img/index_about.png);
    background-size: 100% auto;
    background-repeat: no-repeat;
    background-position: 50% 50%;
    overflow: hidden;
}
.introduce_con{
    margin-top: 50px;
    margin-bottom: 50px;
    text-align: justify;
}
.introduce_con p{
    font-size: 16px;
    line-height: 30px;
    color:white;
    text-indent: 32px;
}
.introduce_btn{
    margin: 0px auto 50px;
    height: 45px;
    line-height: 45px;
    width: 180px;
    background-color: #60b8ff;
    text-align: center;
    font-size: 20px;
}
.introduce_btn a{
    color:white;
}
.swiper_wrapper_box{
    width: 100%;
    height: 0;
    padding-bottom: 140%;
    overflow: hidden;
}
.swiper-slide img {
    width:100%;
}
.qualifications_con{
    margin-top: 50px;
    margin-bottom: 70px;
}
.news{
    width: 100%;
    background-image: url(/img/index_news.png);
    background-size: 100% auto;
    background-repeat: no-repeat;
    background-position: 50% 50%;
    overflow: hidden;
}
.news_con{
    margin-top: 50px;
}
.news_con_left{
    width: 48%;
    float: left;
    position: relative;
    border-radius: 10px;
    overflow: hidden;
}
.news_con_left img{
    width: 100%;
}
.news_con_left_box{
    width: 96%;
    position: absolute;
    left: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.6);
    padding: 2%;
}
.news_con_left_box p{
    color: white;
}
.news_date{
    line-height: 35px;
}
.news_title{
    font-size: 18px;
    line-height: 35px;
}
.news_summary{
    font-size: 16px;
    line-height: 30px; 
    text-indent: 32px;
}
.news_con_right{
    width: 50%;
    float: right;
    color: white;
}
.news_con_right_li{
    height: 100px;
    border-radius: 10px;
    margin-bottom: 38px;
    padding-top: 10px;
    padding-bottom: 10px;
}
.news_con_right_li:hover{
    background-color: #60b8ff;
}
.news_con_right_li_div1{
    float: left;
    width: 100px;
    box-sizing: border-box;
    text-align: center;
    border-right: 2px solid white;
}
.news_con_right_li_div1 p:first-child{
    line-height: 65px;
    font-size: 40px;
}
.news_con_right_li_div1 p:last-child{
    line-height: 35px;
}
.news_con_right_li_div2{
    float: right;
    width: calc(100% - 140px);
    margin-right: 20px;
}
.news_con_right_li_div2 a{
    color:white;
}
.news_con_right_li_div2 p:first-child{
    font-size: 18px;
    line-height: 40px;
}
.news_con_right_li_div2 p:last-child{
    line-height: 25px;
    font-size: 16px;
    text-indent: 32px;
    height: 50px;
    overflow: hidden;
}
.contact_us{
    width: 100%;
    background-image: url(/img/contact.png);
    background-size: 100% auto;
    background-repeat: no-repeat;
    background-position: 50% 0%;
    overflow: hidden;
    margin-top: -60px;
}
.contact_us .main_width{
    margin-top: 13%;
}
.contact_us_con_left{
    width: 40%;
    float: left;
    margin-left: 8%;
    margin-top: 40px;
}
.contact_us_con_left p{
    color: #afafaf;
    font-size: 18px;
    margin-bottom: 40px;
}
.contact_us_con_left p:hover{
    color: #59a6e4;
}
.contact_us_con_right{
    width: 50%;
    float: right;
}
.contact_us_con_right input,.contact_us_con_right textarea{
    background-color: #444444;
    border:none;
    outline: none;
    text-indent: 20px;
    font-size: 16px;
    line-height: 50px;
    color: white;
}
.ipt1{
    width: 48%;
}
.ipt2{
    width: 48%;
    margin-left: 3%;
}
.ipt3{
    width: 100%;
    margin-top: 20px;
}
.ipt4{
    width: 100%;
    margin-top: 20px;
    height: 200px;
}
.contact_btn{
    outline: none;
    color:white;
    border:none;
    display: block;
    margin:20px auto;
}
.bottom{
    background-color: #313131;
    text-align: center;
    font-size: 15px;
    line-height: 24px;
    padding-bottom: 10px;
    padding-top: 10px;
    overflow: hidden;
}
.bottom span, .bottom a{
    color:#afafaf;
}
.bottom span{
    margin-right: 30px;
}
.guohui{
    background-image: url(/img/guohui.png);
    background-size: 20px 20px;
    background-repeat: no-repeat;
    background-position: 0 0;
    padding-left: 25px;
}
.zhichi_ul {
  margin-top: 30px;
}
.zhichi_ul li {
  box-sizing: border-box;
  padding: 20px;
  float: left;
  width: 25%;
  text-align: center;
}
.zhichi_ul li p {
  font-size: 16px;
  line-height: 30px;
}
.zhichi_ul li p:first-child {
  font-weight: bold;
}
@media screen and (min-width: 500px) {
    body {
        min-width: 1200px;
    }
}
.nav_pic{
    display: none;
}
.contact_us .title{
    display: none;
}
.content{
    margin-top: 50px;
    margin-bottom: 50px;
    text-align: justify;
}
@media screen and (max-width: 500px) {
    body{
        width: 100%;
        /* background-color: #f5f5f5; */
    }
    .main_width{
        width: 100%;
    }
    .head{
        height: 60px;
        overflow: visible;
    }
    .logo{
        width: 50px;
        height: 40px;
        margin-left: 10px;
    }
    .nav{
        height:auto;
        background-color: rgba(0, 0, 0, 0.8);
        margin-top: 60px;
        display: none;
    }
    .nav li{
        float: none;
        margin-left: 0;
        border-radius: 0;
        line-height: 40px;
        height: 40px;
    }
    .nav_pic{
        display: block;
        position: absolute;
        top:14px;
        right: 28px;
        width: 40px;
        height: 30px;
    }
    .top_img {
        overflow: hidden;
    }
    .top_img img {
        width: 150%;
        margin-left: -25%;
    }
    .introduce, .news{
        background-size: auto 100%;
    }
    .contact_us {
        background-size: auto 100%;
        background-image: url(/img/contact2.png);
    }
    .introduce_con{
        width: 92%;
        margin-left: 4%;
    }
    .content{
        width: 92%;
        margin-left: 4%;
    }
    .news_con_left{
        width: 100%;
    }
    .news_con_right{
        width: 100%;
        margin-top: 20px;
    }
    .contact_us_con_left, .contact_us_con_right{
        width: 92%;
        margin-right: 4%;
    }
    .contact_us .main_width{
        margin-top: 120px;
    }
    .ipt1,.ipt2{
        margin-left: 0;
        width: 100%;
        margin-top: 20px;
    }
    .bottom .main_width{
        width: 92%;
        margin-right: 4%;
    }
    .bottom span {
        display: block;
        margin-right: 0;
        text-align: left;
    }
    .contact_us .title{
        display: block;
        background:none;
    }
    .zhichi_ul li {
        width: 100%;
        position: relative;
    }
    .zhichi_ul li p {
      text-align: left;
    }
    .zhichi_ul li div:first-child {
      width: 60px;
      height: 60px;
      position: absolute;
      left: 15px;
      top: 50%;
      margin-top: -30px;
    }
    .zhichi_ul li div:last-child {
      float: right;
      width: calc(100% - 80px);
    }
    .zhichi_ul li img {
      width: 60px;
      height: 60px;
    }
    .product_ul li{
        width: 92%;
        margin-left: 4%;
        overflow: hidden;
        text-align: center;
        margin-top: 20px;
    }
}