button:focus{
    outline: none;
}

body{
    position: relative;
}
.body_back{
    width: 100%;
    height: 100%;
    background: black;
    opacity: .5;
    position: fixed;
    left: 0;
    top:0;
    z-index: 20;
    /*display: none;*/
}
.gif{
    position: fixed;
    width: 300px;
    left: 0;
    right: 0;
    top:100px;
    margin: auto;
    z-index: 99;
    /*display: none;*/
}
.close_{
    position: fixed;
    width: 36px;
    height:36px;
    z-index: 999;
    cursor: pointer;
    display: none;
    background:#333;
    border-radius:50%;
    border:1px solid #ccc;
    padding:10px;
}

.sign_logo{
    position: absolute;
}
.sign_p1{
    position: absolute;
    color: #ed9649;
    width: 100%;
    height: 40px;
    line-height: 40px;
    text-align: center;
    left: 0;
}
.sign_p2{
    position: absolute;
    color: #666666;
    width: 100%;
    height: 40px;
    text-align: center;
    left: 0;
}
.sign_now{
    display: block;
    position: absolute;
    left: 0;
    right: 0;
    margin: auto;
    width: 160px;
    height: 45px;
    line-height: 45px;
    color: white;
    background: rgba(237, 150, 73, 0.9);
    border-radius: 5px;
    font-size: 18px;
    border: none;
    text-align: center;
}
.sign_now:hover{
    color: white;
}
.install_class{
    position: absolute;
    left: 0;
    right: 0;
    margin: auto;
    display: block;
    cursor: pointer;
}
.youshi{
    width: 100%;
    position: relative;
}
.buyToUse{
    width: 100%;
    position: relative;
}
.youshi .gray_line,.buyToUse .gray_line{
    height: 3px;
    background: #dddddd;
    margin: auto;
    position: relative;
    z-index: 1;
}
.youshi .gray_line span,.buyToUse .gray_line span{
    width: 80px;
    height: 100%;
    background: #ed9649;
    position: absolute;
    left: 0;
    right: 0;
    z-index: 10;
    top:0;
    margin: auto;
}
.youshi .p1,.buyToUse .p1{
    margin-top: 20px;
    font-size: 20px;
    text-align: center;
}
.youshi ul li{
    position: relative;
}
.youshi ul li:nth-child(2) img{
    left: 0;
    right: 0;
    margin: auto;
}
.youshi ul li:nth-child(3) img{
    right: 0;
}
.youshi ul li .p2{
    position: absolute;
    top:120px;
    width: 220px;
    text-align: center;
    font-size: 15px;
    font-weight: bold;
}
.youshi ul li .p3{
    position: absolute;
    top:170px;
    line-height: 25px;
    width: 160px;
    text-align: center;
    font-size: 13px;
}
.different{
    width: 100%;
    padding-top: 1px;
    position: relative;
}
.different .p1{
    width: 100%;
    text-align: center;
    color: #555555;
}
.different .left .img1{
    width: 100%;
}
.different .left .img2{
    position: absolute;
    left: -5px;
    top:-5px;
    width: 50px;
}
.different .right .img1{
    width: 100%;
}
.different .left p,.different .right p{
    width: 70%;
    margin: auto;
    line-height: 30px;
    position: absolute;
    left: 0;
    right: 0;
}
.different .left .p2,.different .right .p2{
    top:30px;
    font-size: 20px;
    color: #888888;
}
.different .left .p3,.different .right .p3{
    top:70px;
    background:#ed9649 ;
    width: 50px;
    height: 3px;
    left: 15%;
    margin: 0;
}
.different .left .p4,.different .right .p4{
    color: #aaaaaa;
    font-size: 13px;
    line-height: 35px;
}

.buyToUse .img1{
    display: block;
}
.questions{
    width: 100%;
    position: relative;
    padding-top: 1px;
}
.questions .p0{
    text-align: center;
    font-size: 20px;
    color: #555555;
}
.questions ul{
    margin: auto;
}
.questions ul li{
    width: 100%;
    border-bottom: 1px solid #dddddd;
}
.questions ul li .p1{
    font-size: 17px;
    color: #777777;
}
.questions ul li .p2{
    font-size: 13px;
    color: #aaaaaa;
}
.questions ul li:nth-child(7){
    border-bottom: none;
}


@media (min-width: 768px) {
    .phone_login{display: none}
    .sign_logo{
        top:30px;
        left: 50px;
    }
    .sign_p1{
        top:150px;
        font-size: 35px;
    }
    .sign_p2{
        top:200px;
        font-size: 15px;
        line-height: 40px;
    }
    .sign_now{top:280px;}
    .install_class{
        width: 400px;
        top:400px;
    }
    .youshi .gray_line, .buyToUse .gray_line{ width: 800px;}
    .youshi{margin-top: 180px;}
    .youshi ul{
        width: 800px;
        margin: 50px auto;
    }
    .youshi ul li{
        float: left;
        width: 33.3%;
        height: 300px;
    }
    .youshi ul li:first-child img{
        left: 0;
    }
    .youshi ul li img{
        width: 220px;
        position: absolute;
        top:0;
    }
    .youshi ul li .p2{

    }
    .youshi ul li:first-child .p2{
        left: 0;
    }
    .youshi ul li:nth-child(2) .p2{
        left: 0;
        right:0;
        margin: auto;
    }
    .youshi ul li:nth-child(3) .p2{
        right: 0;
    }
    .youshi ul li:first-child .p3{
        left: 30px;
    }
    .youshi ul li:nth-child(2) .p3{
        left: 0;
        right: 0;
        margin: auto;
    }
    .youshi ul li:nth-child(3) .p3{
        right: 30px;
    }
    .different .p1{
        font-size: 20px;
        margin: 60px 0;
    }
    .different .left{
        position: absolute;
        top:150px;
        right: 50%;
        width: 300px;
        height: 400px;
        margin-right: 30px;
    }
    .different .right{
        position: absolute;
        top:150px;
        left: 50%;
        width: 300px;
        height: 400px;
        margin-left: 30px;
    }
    .different{height: 580px;}
    .different .left .p4,.different .right .p4{top:100px}
    .buyToUse{margin-top: 60px}
    .buyToUse .img1{
        width: 800px;
        margin: 80px auto;
    }
    .questions .p0{
        width: 100%;
        margin: 60px 0;
    }
    .questions ul{width: 800px;}
    .questions ul li .p1{
        width: 50%;
        float: left;
        margin-top: 30px;
        margin-bottom: 30px;
    }
    .questions ul li .p2{
        width: 50%;
        float: right;
        margin-top: 30px;
        margin-bottom: 30px;
    }
    .questions{height: 900px;}
    nav.menuOn {display: none;}
    .close_{
        right: 100px;
        top:100px;
    }
}

@media (max-width: 768px) {
    #head_list{display: none}
    .sign_logo{display: none}
    .top_part{height: 360px !important;}
    .sign_p1{
        top:40px;
        font-size: 25px;
    }
    .sign_p2{
        top:90px;
        font-size: 13px;
        width: 80%;
        right:0;
        margin: auto;
        line-height: 20px;
    }
    .sign_now{top:160px;}
    .install_class{
        width: 90%;
        top:240px;
    }
    .youshi .gray_line, .buyToUse .gray_line{ width: 90%;}
    .youshi{margin-top: 150px;}
    .youshi ul{
        width: 90%;
        margin: 20px auto;
    }
    .youshi ul li{
        width: 80%;
        height: 300px;
        margin: auto;
    }
    .youshi ul li img{
        width: 220px;
        position: absolute;
        top:0;
        left: 0;
        right: 0;
        margin: auto;
    }
    .youshi ul li .p2{
        left: 0;
        right: 0;
        margin: auto;
    }
    .youshi ul li .p3{
        left: 0;
        right: 0;
        margin: auto;
    }
    .different .p1{
        font-size: 20px;
        margin: 25px 0;
    }
    .different .left{
        width: 70%;
        margin: 10px auto;
        position: relative;
    }
    .different .right{
        width: 70%;
        margin: 10px auto;
        position: relative;
    }
    .different{padding-bottom: 10px}
    .different .left .p4,.different .right .p4{top:90px}
    .buyToUse .gray_line{display: none}
    .buyToUse .img1{
        width: 95%;
        margin: 40px auto;
    }
    .questions .p0{
        width: 100%;
        margin: 20px auto;
    }
    .questions ul{width: 90%;}
    .questions ul li .p1{
        width: 100%;
        margin-top: 15px;
        margin-bottom: 15px;
    }
    .questions ul li .p2{
        width: 100%;
        margin-bottom: 20px;
    }
    .bottom_part .p1{
        width: 90%;
        margin: 30px auto 0;
    }
     nav.menuOn {
        display: none;
        width: 100%;
        background: #fff;
        position: fixed;
        top: 52px;
        padding: 0 2%;
        z-index: 998;
        height: 100%;
    }
    nav li {
        font-size: 15px;
        line-height: 52px;
        height: 52px;
        border-bottom: 1px solid #eee;
    }
    .close_{
        right: 24px;
        top:84px;
    }
}