html,body{
    color:#333;
    height: 100%;
    position:relative;
    background-color:#FFF;
    overflow-x: hidden;
}
html{
    font-size: 62.5%;
}
body{
    min-width:320px;
    font-size: 1.6rem;
    display: flex;
    flex-direction: column;
    height: auto;
    min-height: 100vh;
}
.tel_one{
    width: 100%;
    background: url('../images/tel_1.jpg') no-repeat;
    background-size: cover;
    height: 46.25vw;
    min-height: 320px;
    margin: 0 auto;
    position: relative;
}
.tel_one_box{
    width:80%;
    max-width:1200px;
    position: absolute;
    top: 50%;
    left: 50%;
    -webkit-transform: translate(-50%, -50%);
    -ms-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
    color:#fff;
}
.tel_one_title {
    font-size: 60px;
    font-weight: bold;
    text-shadow: 0px 2px 10px rgba(0, 0, 0, 0.94);
}
.tel_one_text{
    font-size: 48px;
    padding-top: 36px;
}
.tel_two{
    width: 100%;
    padding:130px 0;
    background: #FFFFFF;
    text-align:center;
}
.tel_two_cont{
    width: 1200px;
    margin: 0 auto;
}
.tel_two_cont_text1{
    font-size: 36px;
    color: #515151;
}
.tel_two_cont_text2{
    font-size: 18px;
    color: #515151;
    padding-top: 19px;
    margin-bottom:80px;
}
.tel_two_cont_ul{
    width:100%;
}
.tel_two_cont_ul li{
    width: 21%;
    padding: 10px 0;
    margin: 0 2%;
    float: left;
}
.tel_two_cont_ul li img{
    width:29%;
    text-align:center;
}
.tel_two_cont_ul_title{
    font-size: 24px;
    color: #515151;
    padding-top: 37px;
    margin-bottom: 8px;
}
.tel_two_cont_ul_text1{
    font-size: 16px;
    color: #515151;
    line-height: 18px;
    margin-bottom: 8px;
}
.tel_two_cont_ul_text2{
    font-size: 16px;
    color: #515151;
    line-height: 18px;
}

.tel_three,.tel_four{
    width: 100%;
    padding:130px 0;
}
.tel_three{
    background: #F7F7F7;
}
.tel_three_cont,.tel_four_cont{
    width: 1200px;
    margin: 0 auto;
}
.tel_three_cont_title,.tel_four_cont_title{
    font-size: 36px;
    color: #515151;
    text-align: center;
}
.tel_three_cont_text1,.tel_four_cont_text1{
    font-size: 18px;
    color: #515151;
    text-align: center;
    padding-top: 20px;
    line-height: 30px;
}
.tel_three_cont_text2,.tel_four_cont_text2{
    font-size: 18px;
    color: #515151;
    line-height: 30px;
    text-align: center;
    margin-bottom:50px;
}
.tel_three_cont .index_three_cont_img,.tel_four_cont .index_four_cont_img{
    width: 900px;
    display:block;
    margin:0 auto;
}
.tel_three_cont .index_three_cont_img,.tel_four_cont .index_four_cont_img{
    display: block;
}
.tel_three_cont .mindex_three_cont_img,.tel_four_cont .mindex_four_cont_img{
    display:none;
}

/*1200px以下导航栏和页脚的样式切换*/
@media (max-width: 1200px) {
    .tel_one_title {
        font-size: 5rem;
    }
    .tel_one_text{
        font-size: 4rem;
        padding-top: 3rem;
    }
    .tel_two{
        padding:10rem 0;
    }
    .tel_two_cont{
        width: 100%;
    }
    .tel_two_cont_text1{
        font-size: 3.2rem;
        width:92%;
        margin:0 auto;
    }
    .tel_two_cont_text2{
        width:92%;
        margin:0 auto;
        margin-bottom:8rem;
    }
    .tel_three,.tel_four{
        padding:10rem 0;
    }
    .tel_three_cont,.tel_four_cont{
        width: 90%;
        margin: 0 auto;
    }
    .tel_three_cont_title,.tel_four_cont_title{
        font-size:3.2rem;
    }
    .tel_three_cont_text1,.tel_four_cont_text1{
        font-size: 1.8rem;
        padding-top: 1.8rem;
        line-height: 2rem;
    }
    .tel_three_cont_text2,.tel_four_cont_text2{
        font-size: 1.8rem;
        padding-top: 1.5rem;
        line-height: 2rem;
        margin-bottom:3rem;
    }
    .tel_three_cont .index_three_cont_img,.tel_four_cont .index_four_cont_img{
        width: 90%;
    }
}
@media (min-width: 769px) and (max-width: 1200px) {

}

/* 媒体查询 - 平板设备 */
/*使用rem作单位*/
@media (max-width: 768px) {
    .tel_one{
        width: 100%;
        height: 100vw;
        min-height: 3rem;
        padding-top: 6rem;
        background: url('../images/mtel_1.jpg') no-repeat;
        background-size: cover;
    }
    .tel_one_box{
        width:90%;
        margin:0 auto;
        top: 0;
        left: 50%;
        -webkit-transform: translate(-50%, 0);
        -ms-transform: translate(-50%, 0);
        transform: translate(-50%,0);
        text-align:center;
        margin-top:20%;
    }
    .tel_one_title {
        font-size: 4.5rem;
    }
    .tel_one_text{
        font-size: 4rem;
        padding-top: 1.5rem;
        font-weight: bold;
    }
    .tel_two{
        padding: 5rem 0 4.5rem 0;
    }
    .tel_two_cont_text1{
        font-size: 2.4rem;
        color: #010101;
    }
    .tel_two_cont_text2{
        font-size: 1.8rem;
        padding-top: 1.8rem;
        margin-bottom:4rem;
    }
    .tel_two_cont_ul{
        width:96%;
        margin:0 auto;
    }
    .tel_two_cont_ul li{
        width: 44%;
        min-height: 40rem;
        padding: 2rem 1%;
        margin: 1.5rem 3%;
        float: left;
        box-shadow: 0rem 0rem 0.8rem 0rem rgba(0, 0, 0, 0.15);
        border-radius: 0.8rem;
        color:#848484;
    }
    .tel_two_cont_ul li img{
        width:29%;
        margin-top:8rem;
    }
    .tel_two_cont_ul_title{
        font-size: 2.2rem;
        padding-top: 2rem;
        color: #333333;
        margin-bottom: 0.8rem;
    }
    .tel_two_cont_ul_text1{
        font-size: 2rem;
        padding-top: 1.5rem;
        color: #333333;
        line-height: 2.2rem;
        margin-bottom: 0.8rem;
    }
    .tel_two_cont_ul_text2{
        font-size: 2rem;
        line-height: 2.2rem;
    }
    .tel_three,.tel_four{
        padding:5rem 0;
    }
    .tel_three_cont_title,.tel_four_cont_title{
        font-size:2.4rem;
        color:#000;
    }
    .tel_three_cont_text2,.tel_four_cont_text2{
        padding-top: 1.5rem;
        margin-bottom:2rem;
    }
}

/* 媒体查询 - 移动设备 */
/*使用rem作单位*/
@media (max-width: 480px) {
    .tel_one_title {
        font-size: 3.4rem;
    }
    .tel_one_text{
        font-size: 2.4rem;
        padding-top: 1rem;
    }
    .tel_two_cont_text2{
        font-size: 1.4rem;
        padding-top: 1.5rem;
        margin-bottom:2rem;
    }
    .tel_two_cont_ul li{
        min-height: 21rem;
    }
    .tel_two_cont_ul li img{
        margin-top:2rem;
    }
    .tel_two_cont_ul_title{
        font-size: 1.4rem;
        padding-top: 1.6rem;
        margin-bottom: 0.6rem;
    }
    .tel_two_cont_ul_text1{
        font-size: 1.2rem;
        padding-top: 0.3rem;
        line-height: 1.6rem;
        margin-bottom: 0.3rem;
    }
    .tel_two_cont_ul_text2{
        font-size: 1.2rem;
        line-height: 1.6rem;
    }
    .tel_three,.tel_four{
        padding:5rem 0;
    }
    .tel_three_cont,.tel_four_cont{
        width: 100%;
    }
    .tel_three_cont p,.tel_four_cont p{
        width:96%;
        margin:0 auto;
    }
    .tel_three_cont_text1,.tel_four_cont_text1{
        font-size: 1.4rem;
    }
    .tel_three_cont_text2,.tel_four_cont_text2{
        font-size: 1.4rem;
        padding-top: 0.9rem;
        padding-bottom: 2rem
    }
    .tel_three_cont .index_three_cont_img,.tel_four_cont .index_four_cont_img{
        display: none;
    }
    .tel_three_cont .mindex_three_cont_img,.tel_four_cont .mindex_four_cont_img{
        display:block;
        width:100%;
    }
}