:root{
      --primary:#0B3D91;
      --primary-dark:#082b68;
      --cyan:#16d9e3;
      --ink:#12213d;
      --muted:#68758b;
      --line:#dfe6f0;
      --surface:#f4f7fb;
      --white:#fff;
      --shadow:0 18px 50px rgba(11,61,145,.12);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:var(--surface);font-family:Arial,"Noto Sans KR",sans-serif;line-height:1.65}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;height:auto}
    button{font:inherit}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}
    .skip-link{position:absolute;left:-9999px;top:10px;padding:10px 16px;background:var(--primary);color:#fff;z-index:1000}
    .skip-link:focus{left:20px}
    .topbar{background:#081b3c;color:#cbd9f0;font-size:13px}
    .topbar-inner{min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar-welcome{margin:0}
    .topbar-contact{display:flex;gap:18px}
    .topbar-contact a:hover{color:var(--cyan)}
    .header{position:relative;background:#fff;border-bottom:1px solid var(--line);z-index:30}
    .header-inner{min-height:76px;display:flex;align-items:center;gap:28px}
    .logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;color:var(--primary);white-space:nowrap}
    .logo img{width:34px;height:34px;object-fit:contain}
    .logo span{font-size:18px}
    .main-nav{flex:1}
    .nav-list{display:flex;align-items:center;justify-content:center;gap:4px;padding:0;margin:0;list-style:none}
    .nav-item{position:relative}
    .nav-link{display:block;padding:27px 13px;font-size:14px;font-weight:700;color:#31415d}
    .nav-link:hover,.nav-item:focus-within>.nav-link{color:var(--primary)}
    .dropdown-panel,.mega-menu{position:absolute;top:calc(100% + 1px);left:50%;transform:translateX(-50%);width:310px;padding:22px;background:#fff;border:1px solid var(--line);border-radius:0 0 16px 16px;box-shadow:var(--shadow);opacity:0;visibility:hidden;pointer-events:none;transition:.2s ease}
    .mega-menu{width:720px}
    .mega-wide{width:920px}
    .nav-item.has-panel:hover>.dropdown-panel,.nav-item.has-panel:focus-within>.dropdown-panel,
    .nav-item.has-panel:hover>.mega-menu,.nav-item.has-panel:focus-within>.mega-menu{opacity:1;visibility:visible;pointer-events:auto}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}
    .dropdown-title,.mega-title{margin:0 0 12px;color:var(--primary);font-weight:800}
    .dropdown-article{display:block;padding:9px 0;border-bottom:1px solid var(--line);font-size:13px}
    .dropdown-article:hover,.panel-more:hover{color:var(--primary)}
    .panel-more{display:block;margin-top:13px;font-size:13px;font-weight:700;color:var(--primary)}
    .mega-layout{display:grid;grid-template-columns:190px 1fr;gap:20px}
    .mega-sidebar{padding-right:16px;border-right:1px solid var(--line);font-size:13px;color:var(--muted)}
    .mega-sidebar p{margin:0 0 13px}
    .mega-sidebar a{display:inline-block;color:var(--primary);font-weight:700}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
    .mega-card{display:block;padding:12px;border:1px solid var(--line);border-radius:12px;background:#fbfdff}
    .mega-card:hover{border-color:var(--cyan);transform:translateY(-2px)}
    .mega-card img{width:100%;height:52px;object-fit:contain;margin-bottom:6px}
    .mega-card strong{display:block;font-size:13px}
    .mega-card small{display:block;color:var(--muted);font-size:11px;line-height:1.45}
    .mega-meta{display:flex;flex-wrap:wrap;gap:7px;margin-top:7px;color:var(--primary);font-size:11px}
    .mega-categories{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
    .mega-categories a{padding:6px 10px;background:#edf4ff;border-radius:30px;color:var(--primary);font-size:12px}
    .header-btns{display:flex;align-items:center;gap:10px}
    .member-entry{font-size:13px;font-weight:700;color:var(--primary)}
    .open-account{padding:10px 15px;border-radius:9px;background:var(--primary);color:#fff;font-size:13px;font-weight:700}
    .open-account:hover{background:var(--primary-dark)}
    .hamburger{display:none;width:42px;height:40px;padding:8px;border:1px solid var(--line);border-radius:9px;background:#fff;cursor:pointer}
    .hamburger span{display:block;width:23px;height:2px;margin:5px auto;background:var(--primary);transition:.2s}
    .hamburger.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
    .drawer-overlay{position:fixed;inset:0;background:rgba(4,16,39,.5);opacity:0;visibility:hidden;z-index:50;transition:.2s}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;top:0;right:0;width:min(370px,88vw);height:100vh;background:#fff;z-index:60;transform:translateX(100%);transition:.25s ease;overflow:auto}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:12px;padding:20px;border-bottom:1px solid var(--line);font-weight:800;color:var(--primary)}
    .drawer-head>a{margin-left:auto;font-size:13px;color:var(--primary)}
    .drawer-close{border:0;background:none;font-size:28px;color:var(--ink);cursor:pointer}
    .drawer-menu{padding:10px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 0;border:0;border-bottom:1px solid var(--line);background:none;text-align:left;font-weight:700;color:var(--ink);cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--primary)}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{display:none;padding:5px 0 8px 15px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:14px}
    .footer{margin-top:70px;background:#081b3c;color:#c5d1e5}
    .footer-main{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:38px;padding:55px 0 42px}
    .footer .logo{color:#fff;margin-bottom:16px}
    .footer-brand p{max-width:330px;margin:0;color:#9fb0ca;font-size:13px}
    .footer h2{margin:0 0 16px;color:#fff;font-size:15px}
    .footer-links{display:grid;gap:9px;font-size:13px}
    .footer-links a:hover,.footer-contact a:hover{color:var(--cyan)}
    .footer-social{margin-top:18px}
    .footer-contact address{display:grid;gap:10px;font-style:normal;font-size:13px}
    .footer-contact span{color:#91a2bd;font-size:12px}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;padding:18px 0;border-top:1px solid rgba(255,255,255,.13);font-size:12px;color:#91a2bd}
    .footer-bottom-links{display:flex;gap:16px}
    .footer-bottom a:hover{color:var(--cyan)}
    .product-page{padding:0 0 20px}
    .product-hero{padding:46px 0 35px;background:linear-gradient(135deg,#edf4ff,#fff)}
    .breadcrumb{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px;color:var(--muted);font-size:13px}
    .breadcrumb a{color:var(--primary)}
    .product-heading{max-width:850px}
    .product-heading h1{margin:0 0 14px;color:var(--ink);font-size:clamp(30px,5vw,56px);line-height:1.15;letter-spacing:-.04em}
    .product-heading p{margin:0;color:var(--muted);font-size:17px}
    .product-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
    .meta-chip{padding:8px 13px;border:1px solid #cbd9ed;border-radius:30px;background:#fff;color:var(--primary);font-size:13px}
    .product-layout{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:28px;align-items:start;margin-top:30px}
    .product-content,.product-aside{min-width:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 25px rgba(15,45,90,.05)}
    .product-content{padding:clamp(22px,4vw,42px)}
    .product-cover{margin:0 0 30px;border-radius:14px;overflow:hidden;background:#eef5ff;text-align:center}
    .product-cover img{display:block;width:100%;max-height:390px;object-fit:cover}
    .product-body{min-width:0;max-width:100%;overflow-x:auto;color:#394861;font-size:16px}
    .product-body img,.product-body table{max-width:100%;height:auto}
    .product-body h2,.product-body h3{color:var(--primary);line-height:1.3}
    .product-body a{color:var(--primary);text-decoration:underline}
    .product-aside{padding:24px;position:sticky;top:20px}
    .product-aside h2{margin:0 0 16px;font-size:19px;color:var(--primary)}
    .aside-list{display:grid;gap:12px}
    .related-product{display:grid;grid-template-columns:70px 1fr;gap:11px;padding-bottom:12px;border-bottom:1px solid var(--line)}
    .related-product img{width:70px;height:55px;object-fit:cover;border-radius:8px;background:#eef5ff}
    .related-product strong{display:block;font-size:13px;line-height:1.35}
    .related-product small{display:block;margin-top:3px;color:var(--muted);font-size:11px}
    .product-actions{display:grid;gap:10px;margin:24px 0 28px}
    .primary-action,.secondary-action{display:block;padding:13px 16px;border-radius:10px;text-align:center;font-weight:800}
    .primary-action{background:var(--primary);color:#fff}
    .secondary-action{border:1px solid #b9c9e0;color:var(--primary)}
    .product-stats{display:grid;gap:10px;padding-top:18px;border-top:1px solid var(--line);font-size:13px}
    .product-stats div{display:flex;justify-content:space-between;gap:10px}
    .product-stats span:first-child{color:var(--muted)}
    @media(max-width:1050px){
      .main-nav{display:none}
      .hamburger{display:block}
      .footer-main{grid-template-columns:repeat(2,1fr)}
      .mega-menu{display:none}
    }
    @media(max-width:760px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-inner{padding:8px 0;align-items:flex-start}
      .topbar-contact{flex-direction:column;gap:2px;text-align:right}
      .header-inner{min-height:66px;gap:12px}
      .member-entry{display:none}
      .open-account{padding:9px 11px;font-size:12px}
      .product-hero{padding:30px 0 24px}
      .product-heading h1{font-size:34px}
      .product-heading p{font-size:15px}
      .product-layout{grid-template-columns:1fr;margin-top:20px}
      .product-aside{position:static}
      .footer-main{grid-template-columns:1fr;gap:28px;padding:40px 0 30px}
      .footer-bottom{flex-direction:column}
    }