.index_banner{
    width: 100%;
    font-size: 0;
    position: relative;
}
.index_banner img{
    width: 100%
}


.index_banner  .layer{
    position: absolute;
    top: 0;
    left: 0;
    background-color: #000;
    width: 100%;
    height: 100%;
    opacity: 0.2;
   z-index: 9;

}




.index_banner  .box{
    width: 100%;
    height: 150px;
    color: #fff;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
    text-align: center;
   z-index: 10;
    
}


.index_banner .box h3{
    font-size: 50px;
}

.index_banner  .box h5{
    font-size: 30px;
    font-weight: 100;
    text-transform: uppercase;
}






.brand{
    width: 100%;
    display: block;
    margin: 0 auto;
    background-color:#F0F0F0;
    position: relative;
    text-align: center;
    padding-top: 150px;
    padding-bottom: 90px;
    box-sizing: border-box;
}


.brand .brands{
    width: 600px;
    height: 144px;
    background-color: #fff;
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 11;
}

.brand .brands ul{
    display: flex;
    align-items: center;
}


.brand .brands ul li{
    float: left;
    width: 300px;
    height: 144px;

    display: block;



}
.brand .brands ul li h3{
   font-size: 26px;
   font-weight: bold;
   margin-top: 35px;
   color: #222222;
}


.brand .brands ul li h5{
   font-size: 12px;
   margin-top: 5px;
   margin-bottom: 5px;
   text-transform: uppercase;
   color: #222222;
}

.brand .brands ul li img{
    width: 20px;
    height: 20px;
    margin: 0 auto;
    display: none;

}



.brand .brands ul  .current{
    transform: scale(1.2);
     background-color: #0536BC;
     border-radius: 5px;
     cursor: pointer;

}

.brand .brands ul  .current img{
    display: block;
}

.brand .brands ul .current h3 {
   font-size: 30px;
   color: #fff;
}


.brand .brands ul .current  h5{
    font-size: 14px;
    color: #fff;
}



.brand   h2{
   color: #0536BC;
   font-size: 29px;

}

.brand   h4{
    color: #5B5B5B;
    text-transform: uppercase;
    font-size: 15px;
    margin-bottom: 40px;
}



.brand  .business{
    width: 1200px;
    height: 300px;
    display: block;
    margin: 0 auto; 

}

.brand  .business ul li{
    float: left;
    width: 23%;
    padding-top: 20px;
    height: 300px;
    box-sizing: border-box;
    box-shadow: 2px 2px 6px rgba(67, 72, 84, 0.5);
    margin-right: 2%;
    transition: transform 0.4s ease;
}

.brand  .business ul li:nth-child(4){
    margin-right: 0;
}
.brand  .business ul li:hover{
    transform: translate(-10px,-10px);
    box-shadow: 5px 5px 15px rgba(67, 72, 84, 0.5);
}


.brand  .business ul li i{
    display: block;
    height: 140px;
    width: 140px;
    background-color: #0536BC;
    border-radius: 50%;
    margin: 0 auto;
    cursor: pointer;
}

.brand  .business ul li i img{
    margin-top: 30px;
}
.brand  .business ul li h5{
    font-size: 16px;
    font-weight: bold;
    margin: 11px 0 18px 0;
    color: #222222;

}

.brand  .business ul li  span{
    font-size: 12px;
    color: #666666;
    font-weight: 600;
}





.service{
    width: 100%;
    height: 780px;
    text-align: center;
    background-color: #D7D7D7;
    padding-top: 116px;
    box-sizing: border-box;
}


.service  h2{
    display: block;
    font-size: 29px;
    color: #0536BC;

  
}


.service  h4{
    font-size: 15px;
    color: #5B5B5B;
    text-transform: uppercase;
    margin-bottom: 55px;
  

}
.service  ul{
    width: 1200px;
    height: 430px;
    display: block;
    margin: 0 auto;
}




.service  ul li{
     width: 380px;
     height: 430px;
     margin-right: 20px;
     float: left;
     font-size: 0;
     box-shadow: 5px 5px 15px rgba(67, 72, 84, 0.5);
     transition: transform 0.4s ease;
}

.service  ul li:hover{
    transform: translate(-10px,-10px);
}

.service  ul li:nth-child(3){
    margin-right: 0;
}

.service  ul li img{
    width: 380px;
    height: 370px;
    transition: transform 0.4s ease;
}

.service  ul li .box{
    width: 380px;
    height: 60px;
    line-height: 60px;
    font-size: 22px;
    background-color: #fff;
    
}









.chain{
    width: 100%;
    text-align: center;
    padding-top: 110px;
    padding-bottom: 150px;
    box-sizing: border-box;
    overflow: hidden;
    background-color: #F0F0F0;
    position: relative;
  
  
 
}

.chain  h2{
    display: block;
    font-size: 29px;
    color: #0536BC;
  
}


.chain  h4{
    font-size: 15px;
    color: #5B5B5B;
    text-transform: uppercase;
    margin-bottom: 60px;
}

.chain .chains{
    width: 85%;
    height: 100%;
    display: block;
    margin: 0 auto;
}
.chain .chains ul{
    width: 100%;
    height: 100%;
}
.chain .chains ul li{
    float: left;
    margin-right: 10px;
    margin-bottom: 10px;
    font-size: 0;
    position: relative;
}



.chain .chains ul li img{
    width: 220px;
    height: 220px;
}

.chain .chains ul li .overlay{
    background-color: #053692;
    font-size: 24px;
    color: #fff;
    position: absolute;
    bottom:  0;
    left: 0;
    width: 100%;
    height: 20%;
    background-color: rgba(5, 54, 146, 0.6); /* 遮层背景颜色和透明度 */
    opacity: 0; /* 默认隐藏遮层 */
    transition: opacity 0.3s ease-in-out; /* 过渡效果 */
    line-height: 40px;
}

.chain .chains ul li:hover  .overlay{
    opacity: 1; /* 鼠标悬停时显示遮层 */
}






.chain_b{
    width: 450px;
    position: absolute;
    bottom:0;
    left: 50%;
    transform: translate(-50%, -50%);
    box-sizing: border-box;
    display: flex;
    justify-content: center;
}

.chain_b button{
    height: 50px;
    display: flex;
    align-items: center;
    border: 0;
    color: #fff;
    background-color: #0536BC;
    padding: 10px 20px;
    box-sizing: border-box;
    cursor: pointer;
    transition: transform 0.4s ease;
}

.chain_b button img{
  margin-right: 10px;
}




.chain_b button:hover{
    transform: translate(-2px,-2px);
    box-shadow: 5px 5px 15px rgba(67, 72, 84, 0.5);
    
}