.bt_brand_area {background:#f6f6f6;padding:50px 0;}
.bt_brand_area .container{max-width:1230px;}
.bt_brand_area ul{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;}
.bt_brand_area ul li img{height:70px;}


@media (max-width:1441px){
.bt_brand_area .container{max-width:1200px;}
}

@media (max-width:1367px){
.bt_brand_area .container{max-width:100%;}
}


@media screen and (max-width:1280px) {
.bt_brand_area{padding:30px 0;}
.bt_brand_area ul{margin:-10px -10px 0;}  
.bt_brand_area ul li{width:20%;padding:10px;}
.bt_brand_area ul li .box{height:90px;background:#fff;box-shadow:0 0 10px rgba(63,62,62,0.05);display:flex;justify-content:center;align-items:center;}  
.bt_brand_area ul li img{height:auto;max-height:60%;max-width:60%;}
}

@media screen and (max-width:992px) {
.bt_brand_area ul li{width:25%;}
}

@media screen and (max-width:768px) {
.bt_brand_area{padding:20px 0;}
.bt_brand_area ul li{width:33.3333%;}
}

@media screen and (max-width:640px) {
.bt_brand_area ul li .box{height:80px;}
}

@media screen and (max-width:640px) {
.bt_brand_area ul li .box{height:60px;}
}