.header {
            width: 100%;
            height: 100px;
            text-align: center;
            box-shadow: 1px 3px 7px 0px rgba(0, 0, 0, 0.08);
            z-index: 200;
        }
        
        .header-con {
            width: 1200px;
            height: 100%;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
        }
        
        .header-logo {
            width: 200px;
            display: flex;
            align-items: center;
        }
        
        .header-logo img {
            height: 50px;
            width: auto;
        }
        
        .header-navigation {
            display: flex;
            flex-direction: row;
            list-style: none;
            align-items: center;
        }
        
        .header-navigation li a {
            text-decoration: none;
            color: #6B6B6B;
            font-size: 19px;
            font-weight: 500;
        }
        
        .header-navigation li.active a {
            color: #4990E2;
        }
        
        .header-navigation li {
            padding: 20px 30px;
        }
        
        .header-second,
        .header-service,
        .header-us {
            font-size: 20px;
            font-weight: 500;
            color: #898989;
            /* background: url("../image/public/arrow.png") no-repeat right; */
            position: relative;
        }
        
        .header-second:hover,
        .header-service:hover,
        .header-us:hover {
            color: #4990E2;
            /* background: url("../image/public/arrow-active.png") no-repeat right; */
        }
        
        .productlist,
        .servicelist,
        .aboutuslist {
            position: absolute;
            left: 0;
            top: 60px;
            background: none;
            display: none;
            z-index: 100;
            list-style: none;
            padding: 23px 15px 15px 5px;
            line-height: 35px;
            width: 100%;
            box-sizing: border-box;
            /* background-color: pink; */
            margin-left: -20px;
        }
        
        .productlist li,
        .servicelist li,
        .aboutuslist li {
            padding: 0px 0px;
        }
        
        .productlist div,
        .servicelist div,
        .aboutuslist div {
            width: 140px;
            background: #E4E2E5;
            opacity: 0.85;
            padding: 9px 0;
        }
        
        .productlist li a,
        .servicelist li a,
        .aboutuslist li a {
            padding: 5px;
            font-size: 16px;
            font-weight: 500;
        }
        
        .header-second:hover .productlist,
        .header-service:hover .servicelist,
        .header-us:hover .aboutuslist {
            display: block;
        }
        
        .header-navigation li a:hover {
            color: #4990E2;
        }