.banner-con{
    background: url(../images/case-bg.jpg) no-repeat;
    background-size: cover;
    color: #ffffff;
}
.case-menu li{
    flex: 1;
}
.case-menu li a{
    color: #1a1a1a;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding-top: 20px;
    padding-bottom: 20px;
}
.case-menu li a p{
    margin-bottom: 0;
    padding: 15px;
}
.case-menu li a p:nth-of-type(1){
    font-size: 20px;
}
.case-menu li a>.icon{
    width: 128px;
    height: 84px;
    display: flex;
    justify-content: center;
    align-items: center;
}
.case-menu li:nth-child(1) a .icon1:before{
    content: "";
    background: url(../images/mobile-crusher-plant.png) no-repeat;
    width: 128px;
    height: 84px;
    display: block;
    mix-blend-mode: multiply;
}
.case-menu li:nth-child(2) a .icon1:before{
    content: "";
    background: url(../images/crusher-plant.png) no-repeat;
     width: 128px;
    height: 84px;
    display: block;
}
.case-menu li:nth-child(3) a .icon1:before{
    content: "";
    background: url(../images/sand-making-plant.png) no-repeat;
    width: 128px;
    height: 84px;
    display: block;
}
.case-menu li:nth-child(4) a .icon1:before{
    content: "";
    background: url(../images/mill-plant.png) no-repeat;
     width: 128px;
    height: 84px;
    display: block;
}
.case-menu li:nth-child(5) a .icon1:before{
    content: "";
    background: url(../images/raw-material.png) no-repeat;
     width: 128px;
    height: 84px;
    display: block;
}
.case-menu li.active a .icon:before{
     content: "";
    background: url(../images/xuanzhong.png) center no-repeat;
     width: 128px;
    height: 84px;
    display: block;
    mix-blend-mode: normal;
}
.case-menu li.active a p{
    color: #ffffff;
}
.case-menu li.active a .line-dian:after{
    display: none;
}
.case-menu li a .line-dian{
    position: relative;
    width: 100%;
}
.case-menu li a .line-dian .icon{
    display: flex;
    justify-content: center;
    align-items: center;
}
.case-menu li a .line-dian .icon:before{
    content: "";
    background: url(../images/contact_false.png) no-repeat;
    width: 33px;
    height: 32px;
    display: block;
    mix-blend-mode: multiply;
}
.case-menu li.active a .line-dian .icon:before{
    content: "";
    background: url(../images/contact_true.png) no-repeat;
    width: 33px;
    height: 32px;
    display: block;
    mix-blend-mode:normal;
}
.case-menu li a .line-dian:after{
    content: "";
    width: 100%;
    height: 1px;
    background: #cccccc;
    position: absolute;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
}
.case-menu li:nth-child(1) a .line-dian:before{
    content: "";
    width: calc((100vw - 1400px) / 2);
    height: 1px;
    background: #cccccc;
    position: absolute;
    top: 50%;
    left: calc((100vw - 1400px) / -2);
    transform: translateY(-50%);
}
.case-menu li:nth-child(5) a .line-dian:before{
    content: "";
    width: calc((100vw - 1400px) / 2);
    height: 1px;
    background: #cccccc;
    position: absolute;
    top: 50%;
    left: calc((100vw - 1400px) / 2);
    transform: translateY(-50%);
    z-index: -1;
}
.case-menu li.active a{
    background: #b94240;
}
.case-list-con .case-list>ul{
    gap: 30px;
}
.case-list-con .case-list>ul>li{
    width: calc((100% - 60px) / 3);
    position: relative;
}
.case-list-con .case-list>ul>li:after{
    content: "";
    width: 0;
    height: 5px;
    background: #b94240;
    position: absolute;
    left: 50%;
    bottom: 0;
    transition: all .5s ease;
}
.case-list-con .case-list>ul>li a{
    display: flex;
    flex-direction: column;
    color: #4c4c4c;
}
.case-list-con .case-list>ul>li a .img{
    overflow: hidden;
}
.case-list-con .case-list>ul>li a .img img{
    transition: all .5s ease;
}
.case-list-con .case-list ul li a .title-attr{
    padding: 20px;
    border: 1px solid #b9bbc1;
}
.case-list-con .case-list ul li a .title{
    font-size: 20px;
    font-weight: bold;
    position: relative;
    padding-left: 20px;
    transition: all .5s ease;
}
.case-list-con .case-list ul li a .title:before{
    content: "";
    width: 10px;
    height: 10px;
    background: #b94240;
    position: absolute;
    left: 0;
    top: 8px;
}
.case-list-con .case-list ul li:hover img{
    transform: scale(1.05);
}
.case-list-con .case-list ul li:hover .title{
    color: #b94240;
}
.case-list-con .case-list>ul>li:hover:after{
    width: 100%;
    left: 0;
}

@media (max-width:1080px){
    .case-menu{
        overflow-x: auto;
    }
    .case-menu ul{
        width: fit-content;
        white-space: nowrap;
    }
    .case-list-con .case-list>ul{
        gap: 15px;
    }
    .case-list-con .case-list>ul>li{
        width: calc((100% - 30px) / 3);
    }
}

@media (max-width:768px){
     .case-list-con .case-list>ul>li{
        width: calc((100% - 15px) / 2);
    }
}

@media (max-width:500px){
    .case-list-con .case-list ul li a .title-attr{
        padding: 10px;
    }
    .case-list-con .case-list ul li a .title{
        font-size: 16px;
    }
    .case-list-con .case-list>ul>li a ul{
        font-size: 14px;
    }
}