.app{
    width: 100%;
    height: auto;
}
.header{
    width: 100%;
    height: 100%;
    position: relative;
}
.header .banner{
    width: 100%;
    height: auto;
}
.logo_box{
    width: 1200px; 
    position: absolute;
    height: 610px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
.logo_box .logo{ 
    display: block;
    position: absolute;
    width: 449px;
    height: 54px;
    top: 0;
    left: 0;
}
.logo_box .logo img{
    width: 100%;
}
.logo_box .btn_link{ 
    display: block;
    position: absolute;
    width: 265px;
    height: 74px;
    background: #FFFFFF;
    border-radius: 37px;
    font-size: 30px;
    font-family: SourceHanSansCN;
    font-weight: 500;
    color: #239FFE;
    line-height: 74px; 
    text-align: center;
    bottom: 0;
    left: 0;
}
.content{
    width: 1100px;
    margin: 0 auto;
    padding: 86px 0;
}
.content h2{
    text-align: center;
    font-size: 26px;
    font-family: SourceHanSansCN;
    font-weight: bold;
    color: #000000;
    margin-bottom: 54px;
    position: relative;
}
.content h2::after{
    content: "";
    display: block;
    position: absolute;
    width: 155px;
    height: 2px;
    background: #000000;
    bottom: 30px;
    right: 316px;
}
.content h2::before{
    content: "";
    display: block;
    position: absolute;
    width: 155px;
    height: 2px;
    background: #000000;
    bottom: 30px;
    left: 316px;
}
.text_box p{
    font-size: 18px;
    font-family: SourceHanSansCN;
    font-weight: 400;
    color: #000000;
    line-height: 40px;
    text-indent: 2em;
}
.content h2 p{
    font-size: 16px;
    font-family: Microsoft YaHei;
    font-weight: bold;
    color: #000000;
    margin-top: 6px;
}
.content_1{
    width: 100%;
    height: auto;
}
.content_2{
    width: 100%;
    padding: 100px 300px;
    box-sizing: border-box;
    height: auto;
}
.content_4{
    width: 100%;
    padding: 70px 400px;
    box-sizing: border-box;
    height: auto;
}
.content_6{
    width: 100%;
    padding: 100px 350px 60px;
    box-sizing: border-box;
    height: auto;
}
.foort{
    width: 100%;
}
.foort img{
    width: 100%;
    height: auto;
}
@media (max-width: 1500px){
    .logo_box{
        width: 800px; 
        position: absolute;
        height: 410px;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
    }
}
@media (max-width: 750px){
    
    .logo_box{
        width: 100%;  
        height: 100%; 
        position: absolute;
        transform: translate(0);
        top: 0;
        left: 0;
        bottom: 0;
        right: 0;
    }
    .logo_box .logo{ 
        display: block;
        position: absolute;
        width: 4.49rem;
        height: .54rem;
        top: .1rem;
        left: 10%; 
    }
    .logo_box .btn_link{ 
        display: block;
        position: absolute;
        width: 2.25rem;
        height: .74rem;
        background: #FFFFFF;
        border-radius: .37rem;
        font-size: .2rem;
        font-family: SourceHanSansCN;
        font-weight: 500;
        color: #239FFE;
        line-height: .74rem; 
        text-align: center;
        bottom: .2rem;
        left: 10%; 
    }
    .content{
        width: 100%; 
        padding: .86rem 0;
    }
    .content h2{
        text-align: center;
        font-size: .26rem;
        font-family: SourceHanSansCN;
        font-weight: bold;
        color: #000000;
        margin-bottom: .54rem;
        position: relative;
    }
    .content h2::after{
        content: "";
        display: block;
        position: absolute;
        width: 1.55rem;
        height: 2px;
        background: #000000;
        bottom: .4rem;
        right: 1.3rem;
    }
    .content h2::before{
        content: "";
        display: block;
        position: absolute;
        width: 1.55rem;
        height: 2px;
        background: #000000;
        bottom: .4rem;
        left: 1.3rem;
    }
    .text_box p{
        font-size: .18rem;
        font-family: SourceHanSansCN;
        font-weight: 400;
        color: #000000;
        line-height: .4rem;
        text-indent: 2em;
    }
    .content h2 p{
        font-size: .16rem;
        font-family: Microsoft YaHei;
        font-weight: bold;
        color: #000000;
        margin-top: 6px;
    }
    .content_2{
        width: 100%;
        padding: 1rem .1rem;
        box-sizing: border-box;
        height: auto;
    }
    .content_4{
        width: 100%;
        padding: 1rem .1rem;
        box-sizing: border-box;
        height: auto;
    }
    .content_6{
        width: 100%;
        padding: 1rem .1rem;
        box-sizing: border-box;
        height: auto;
    }
    .text_box{
        padding: 0 .2rem;
    }
}