@media screen and (max-width:720px){


    /* header */
    .header_bg header {position:relative; height:70px; padding:0 10px;}
    .header_bg header .gnb {display:none;}
    .header_bg header h1 a img {height:20px;}
    /* header > m_nav */
    .header_bg header .m_nav {display:block;}
    .header_bg header .m_nav img {width:35px;}
    .header_bg header .m_nav_open {
        position:absolute; right:10px; top:60px; display:block; width:100px;
    }
    .header_bg header .m_nav_open a {
        color:#222; display:flex; flex-flow:column; align-items:center; padding:10px; transition:0.3s;
        background-color:#fff; border-radius:10px; justify-content:center; width:100%;
        margin-bottom:10px; box-shadow:1px 1px 1px rgba(0,0,0,0.2); font-size:14px; font-weight:700;
    }
    .header_bg header .m_nav_open a:nth-of-type(2) {background-color:#19b8d1;}
    .header_bg header .m_nav_open a:hover {
        background-color:#19b8d1; color:#222; transition:all 0.3s ease; text-shadow:1px 1px 1px rgba(0,0,0,0.2);
    }

    /* product_p1 */
    main .p1_bg {height:330px; margin-bottom:300px;}
    main .p1_bg .p1_Product {padding:100px 0 100px 0;}
    main .p1_bg .p1_Product {padding:130px 20px 170px 20px;}
    main .p1_bg .p1_Product h1 {margin-bottom:60px;}
    main .p1_bg .p1_Product .swiper-container .swiper-wrapper .swiper-slide div img {height:190px;}
    main .p1_bg .p1_Product .swiper-container .swiper-pagination {bottom:130px;}
    /* product_p2 */
    main .p2_mainProduct {padding:30px 0 100px 0;}
    main .p2_mainProduct div {padding:0 20px; flex-flow:row wrap;}
    main .p2_mainProduct .product_l1,
    main .p2_mainProduct .product_l2 {display:none;}
    main .p2_mainProduct .product_m1 {display:flex; justify-content:space-around;}
    main .p2_mainProduct .product_m1 a {width:45%; transition:0.3s;}
    main .p2_mainProduct .product_m1 a:hover {filter:brightness(90%);}
    main .p2_mainProduct .product_m1 a p {margin:10px 0 5px 0; color:#999; font-size:14px;}
    main .p2_mainProduct .product_m1 a h2 {font-size:15px; font-weight:700; margin-bottom:30px; margin-top:10px;}
    /* footer */
    .footer_bg {height:350px;}
    .footer_bg footer {width:100%; padding:0 20px; flex-flow:column;}
    .footer_bg footer .footer_left {display:flex; flex-flow:column; margin-bottom:50px; align-items:center;}
    .footer_bg footer .footer_left h1 {}
    .footer_bg footer .footer_left h1 img {height:20px; margin-bottom:10px;}
    .footer_bg footer .footer_right {text-align:center; width:80%;}
    .footer_bg footer .footer_right p {font-size:14px; line-height:1.8;}
    br {display:none !important;}


}