#introduce_head .section{
    padding-top: 1px;
    /*height: 3000px;*/
}
#introduce_head .section1{
    padding-top: 1px;
    margin: auto;
}
#introduce_head .section2{
    background: url("../img/55.png");
    height: 500px;
    background-size: 100% 500px;
}
#introduce_head .section h3{
    font-size: 20px;
    color: #bbbbbb;
    font-weight: normal;
    text-align: center;
    letter-spacing: 1px;
}
#introduce_head .section1 ul li{
    float: left;
}
#introduce_head .section1 .right .top li{
    height: 100%;
}
#introduce_head .section1 .right .top li:first-child img{
    width: 86%;
    margin: 40px 7% 0;
}
#introduce_head .section1 .right .top li:nth-child(2) img{
    width: 72%;
    margin: 35px 14% 0;
}
#introduce_head .section1 .right .top li:nth-child(3) img{
    width: 100%;
    margin: 37px 0 0;
}
#introduce_head .section1 .right .bottom img{
    width: 100%;
}
#introduce_head .section2{
    padding-top: 1px;
}
#introduce_head .section2 h3{
    margin-top: 80px;
}
#introduce_head .section2 .p1{
    margin: 20px auto 0;
    font-size: 13px;
    text-align: center;
    line-height: 22px;
    color: #bbbbbb;
}
#introduce_head .section2 ul{
    position: relative;
    left: 0;
    top:0;
}
#introduce_head .section2 ul li{
    float: left;
    height: 100%;
    background: url("../img/97.png");
    text-align: center;
}
#introduce_head .section2 ul li .p2{
    color: orange;
}
#introduce_head .section2 .p4{
    font-size: 13px;
    color: #888888;
}
#introduce_head .section2 .p4 img{
    vertical-align: middle;
    width: 15px;
    margin-top: -5px;
}
#introduce_head .section2 .p3{
    font-size: 12px;
    color: #bbbbbb;
    margin: auto;
    text-align: left;
    line-height: 20px;
}
#introduce_head .section2 .orange_line{
    display: block;
    width: 60px;
    height: 2px;
    background: orange;
}
#introduce_head .section2 ul .p6{
    border: 1px solid #eeeeee;
    color: #aaaaaa;
    height: 25px;
    line-height: 25px;
    font-size: 12px;
    background: none;
    cursor: pointer;
    padding: 0;
    letter-spacing: 1px;
    display: inline-block;
    margin: 0;
}
#introduce_head .section2 button:focus{
    outline: none;
}
#introduce_head .section3{
    padding-top: 1px;
    height: auto;
}
#introduce_head .section3 h3{
    margin-top: 150px;
}
#introduce_head .section3 ul li{
    background: url("../img/67.png");
}
#introduce_head .section3 ul li:nth-child(5){
    margin-right: 0;
}
#introduce_head .section3 ul li:nth-child(10){
    margin-right: 0;
}
#introduce_head .section3 img{
    width: 40px;
}
#introduce_head .section3 p{
    font-size: 14px;
    color: #444444;
    margin-top: 10px;
}
#introduce_head .footer{
    width: 100%;
    margin: 0;
    background: black;
    height: 150px;
    padding-top: 1px;
}

@media (min-width: 768px) {
    #introduce_head .head{
        height: 600px;
        background: url('../img/225.png');
        background-size: 100% 600px
    }
    #introduce_head .section1{
        width: 1100px;
        height: 465px;
    }
    #introduce_head .section h3{
        margin-top: 50px;
    }
    #introduce_head .section1 .left{
        width: 480px;
        margin-top: 70px;
    }
    #introduce_head .section1 .right{
        display: inline-block;
        margin-left: 50px;
        width: 550px;
        margin-top: 70px;
        height: 320px;
    }
    #introduce_head .section1 .right .top{
        height: 182px;
    }
    #introduce_head .section1 ul li{
        width: 166px;
        margin-right: 25px;
    }
    #introduce_head .section2 .p1{
        width: 500px;
    }
    #introduce_head .section2 ul{
        width: 1000px;
        height: 350px;
        margin: 60px auto 0;
    }
    #introduce_head .section2 ul li{
        margin-right: 50px;
        width: 300px;
        background-size: 100%;
    }
    #introduce_head .section2 ul li .user_head{
        width: 60px;
        margin-top: 30px;
    }
    #introduce_head .section2 ul li .p2{
        margin-top: 20px;
        font-size: 15px;
    }
    #introduce_head .section2 #phone_p4{
        display: none;
    }
    #introduce_head .section2 .p4{
        margin: 30px auto 15px;
        width: 70%;
    }
    #introduce_head .section2 .p4 span{
        margin:0 6px;
        font-size: 14px;
        font-weight: bold;
    }
    #introduce_head .section2 .p4 .left{
        margin-left: 30px;
    }
    #introduce_head .section2 .p3{
        width: 65%;
    }
    #introduce_head .section2 .orange_line{
        margin: 25px auto 15px;
    }
    #introduce_head .section2 a{
        width: 180px;
    }
    #introduce_head .section3 ul{
        margin: 30px auto 0;
        width: 1000px;
    }
    #introduce_head .section3 ul li{
        background-size: 100%;
        margin-right: 20px;
        width: 180px;
        height: 150px;
        margin-top: 30px;
        /*transform-style:preserve-3d;*/
        transition: all .5s;
        position: relative;
    }
    /*#introduce_head .section3 ul li:hover{*/
        /*transform: translateY(-10px);*/
    /*}*/
    @keyframes li_height {
        0%{height: 0}
        100%{height: 88%}
    }
    #introduce_head .section3 ul li .li_back{
        position: absolute;
        left: 5%;
        top:5%;
        width: 90%;
        height: 0;
        z-index: 1;
        background: #ffc438;
        overflow: hidden;
        /*z-index: 1;*/
    }
    #introduce_head .section3 ul li .li_back .p1{
        color: white;
        margin-top: 30px;
        font-size: 15px;
    }
    #introduce_head .section3 ul li .li_back .p2{
        display: block;
        position: absolute;
        top:80px;
        left: 0;
        right: 0;
        margin: auto;
        border: 1px solid white;
        border-radius: 3px;
        width: 100px;
        height: 28px;
        line-height: 28px;
        font-size: 15px;
        cursor: pointer;
        color: white;
    }
    #introduce_head .section3 ul li:hover .li_back{
        animation: li_height .3s;
        height: 88%;
    }

    #introduce_head .section3 img{
        margin-top: 35px;
    }
    #introduce_head .section3{
        padding-bottom: 60px;
    }
    #introduce_head .footer .footer_middle{
        width: 1000px;
        margin: 40px auto;
        position: relative;
    }

}

@media (max-width: 768px) {
    #introduce_head .head{
        height: 250px;
        background: url('../img/95.png');
        background-size: 100% 250px
    }
    #introduce_head .head .head_words{
        top:120px;
    }
    #introduce_head .section1{
        width: 100%;
        height: 450px;
    }
    #introduce_head .section h3{
        margin-top: 10px;
        font-size: 18px;
    }
    #introduce_head .section1 .left{
        width: 200px;
        margin: 20px auto 0;
        display: block;
    }
    #introduce_head .section1 .right{
        width: 96%;
        margin:auto;
        height: 320px;
    }
    #introduce_head .section1 ul li{
        width: 32%;
        margin-right: 2%;
    }
    #introduce_head .section1 .right .top{
        height: 130px;
    }
    #introduce_head .section1 ul li:nth-child(3){
        margin-right: 0;
    }
    #introduce_head .section2 .p1{
        width: 80%;
    }
    #introduce_head .section2 ul{
        width: 96%;
        height: 330px;
        margin: 30px auto 0;
    }
    #introduce_head .section2 ul li{
        width: 33.3%;
        margin-right: 0;
        background-size: 100% 100%;
    }
    #introduce_head .section2 ul li .user_head{
        width: 50px;
        margin-top: 20px;
    }
    #introduce_head .section2 ul li .p2{
        margin-top: 10px;
        font-size: 13px;
    }
    #introduce_head .section2 .pc_p4{
        display: none;
    }
    #introduce_head .section2 .p4{
        margin: 10px auto 5px;
        width: 80%;
    }
    #introduce_head .section2 .p4 .span1{
        display: block;
    }
    #introduce_head .section2 .p4 .span2{
        display: block;
    }
    #introduce_head .section2 .p4 span{
        margin:0;
        font-size: 13px;
        /*font-weight: bold;*/
    }
    #introduce_head .section2 .p4 .left{
        margin: 0;
    }
    #introduce_head .section2 .p3{
        width: 80%;
        height: 100px;
        overflow: hidden;
    }
    #introduce_head .section2 .orange_line{
        margin: 10px auto;
    }
    #introduce_head .section2 button{
        width: 80%;
    }
    #introduce_head .section3 ul{
        margin: 20px auto 0;
        width: 100%;
    }
    #introduce_head .section3 ul li{
        background-size: 100% 100%;
        margin: 20px 1% 0;
        width: 48%;
        height: 120px;
    }
    #introduce_head .section3 img{
        margin-top: 20px;
    }
    #introduce_head .section3{
        padding-bottom: 30px;
    }
    #introduce_head .footer .footer_middle{
        width: 90%;
        margin: 30px auto;
        position: relative;
    }
    #introduce_head .footer .footer_middle .p2{
        width: auto;
    }
}