:root{
      --primary:#0B3D91;
      --teal:#0891B2;
      --ink:#172033;
      --muted:#617087;
      --line:#dce5ef;
      --soft:#f3f8fb;
      --white:#fff;
      --shadow:0 18px 50px rgba(11,61,145,.12);
      --radius:18px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:#f8fbfd;color:var(--ink);font-family:Arial,"Noto Sans Thai",sans-serif;line-height:1.65}
    body.drawer-lock{overflow:hidden}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button{font:inherit}
    .container{width:min(var(--container),calc(100% - 40px));margin:0 auto}

    .topbar{background:#10243e;color:#dcecf2;font-size:13px}
    .topbar-inner{min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar p{margin:0}
    .topbar-contact{display:flex;gap:20px}
    .topbar-contact a:hover{color:#fff}

    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
    .header-inner{min-height:78px;display:flex;align-items:center;gap:26px}
    .logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;color:var(--primary);white-space:nowrap}
    .logo img{width:38px;height:38px;object-fit:contain}
    .main-nav{margin-left:auto}
    .nav-list{display:flex;align-items:center;gap:3px;list-style:none;margin:0;padding:0}
    .nav-item{position:relative}
    .nav-link{display:block;padding:28px 13px;color:#25364e;font-size:14px;font-weight:700}
    .nav-link:hover,.nav-link:focus{color:var(--teal)}
    .has-arrow:after{content:"⌄";font-size:12px;margin-left:6px}
    .dropdown-panel,.mega-menu{
      position:absolute;top:100%;left:50%;transform:translateX(-50%);
      width:280px;padding:22px;background:#fff;border:1px solid var(--line);
      border-radius:0 0 16px 16px;box-shadow:var(--shadow);opacity:0;visibility:hidden;
      transition:.2s ease;z-index:30
    }
    .mega-menu{width:650px}
    .mega-wide{width:760px}
    .nav-item:after{content:"";position:absolute;left:0;right:0;top:100%;height:12px}
    .nav-item:hover>.dropdown-panel,.nav-item:focus-within>.dropdown-panel,
    .nav-item:hover>.mega-menu,.nav-item:focus-within>.mega-menu{opacity:1;visibility:visible}
    .dropdown-title,.mega-title{margin:0 0 14px;color:var(--primary);font-size:16px;font-weight:800}
    .dropdown-list,.footer-links{display:grid;gap:9px}
    .dropdown-list a,.mega-category-list a{font-size:13px;color:#43536a}
    .dropdown-list a:hover,.mega-category-list a:hover{color:var(--teal)}
    .dropdown-all,.mega-footer{display:inline-block;margin-top:16px;color:var(--teal);font-size:13px;font-weight:800}
    .mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
    .mega-card{display:flex;gap:10px;padding:10px;border:1px solid #e6edf3;border-radius:12px;background:#fbfdfe}
    .mega-card:hover{border-color:#91d9e6;background:#f0fbfd}
    .mega-card>img{width:36px;height:36px;object-fit:contain;border-radius:7px}
    .mega-card-body{min-width:0}
    .mega-card strong{display:block;font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
    .mega-card small,.mega-card p{display:block;margin:2px 0 0;color:var(--muted);font-size:11px;line-height:1.4}
    .mega-category-list{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:15px}
    .mega-category-list a{padding:5px 9px;background:var(--soft);border-radius:99px}

    .header-btns{display:flex;align-items:center;gap:12px}
    .account-link{padding:10px 15px;border-radius:10px;background:var(--primary);color:#fff;font-size:13px;font-weight:800}
    .account-link:hover{background:var(--teal)}
    .hamburger{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;padding:10px}
    .hamburger span{display:block;height:2px;margin:4px 0;background:var(--primary);transition:.2s}
    .hamburger.active span:nth-child(1){transform:translateY(6px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

    .drawer-overlay{position:fixed;inset:0;background:rgba(9,25,45,.58);opacity:0;visibility:hidden;transition:.25s;z-index:40}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;top:0;right:0;width:min(390px,88vw);height:100vh;overflow:auto;background:#fff;transform:translateX(105%);transition:.3s;z-index:50;box-shadow:-15px 0 40px rgba(0,0,0,.18)}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:12px;padding:18px 20px;border-bottom:1px solid var(--line);color:var(--primary);font-weight:800}
    .drawer-head>a{margin-left:auto;color:var(--teal);font-size:13px}
    .drawer-close{border:0;background:transparent;color:var(--ink);font-size:28px;line-height:1;cursor:pointer}
    .drawer-menu{padding:14px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 0;border:0;border-bottom:1px solid #edf1f5;background:none;text-align:left;color:var(--ink);font-weight:700;cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--teal);font-size:20px}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{display:none;padding:6px 0 8px 15px}
    .drawer-submenu.open{display:grid;gap:8px}
    .drawer-submenu a{font-size:13px;color:var(--muted)}

    .ea-content-stack{padding:54px 0 76px}
    .product-breadcrumb{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:26px;color:var(--muted);font-size:13px}
    .product-breadcrumb a{color:var(--teal)}
    .product-hero{display:grid;grid-template-columns:minmax(0,1fr) 350px;gap:42px;align-items:center;padding:38px;background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow)}
    .product-kicker{display:inline-flex;padding:6px 12px;border-radius:99px;background:#e6f8fb;color:#08758a;font-size:12px;font-weight:800}
    .product-hero h1{margin:15px 0 12px;color:var(--primary);font-size:clamp(30px,4vw,52px);line-height:1.1}
    .product-summary{margin:0;color:var(--muted);font-size:17px}
    .product-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;color:var(--muted);font-size:13px}
    .product-meta span{padding:8px 11px;background:var(--soft);border-radius:9px}
    .product-cover{min-height:270px;display:grid;place-items:center;padding:25px;background:linear-gradient(145deg,#e8f9fb,#e8effb);border-radius:20px}
    .product-cover img{max-height:230px;object-fit:contain}
    .product-layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:30px;margin-top:30px;align-items:start}
    .product-body-wrap,.related-products{background:#fff;border:1px solid var(--line);border-radius:20px;padding:30px}
    .section-heading{margin:0 0 20px;color:var(--primary);font-size:24px}
    .product-body{min-width:0;max-width:100%;overflow-x:auto;color:#3f4d60}
    .product-body img,.product-body table{max-width:100%;height:auto}
    .product-body table{border-collapse:collapse}
    .product-body td,.product-body th{padding:9px;border:1px solid var(--line)}
    .product-body h2,.product-body h3{color:var(--primary)}
    .related-products{position:sticky;top:20px}
    .related-products h2{margin:0 0 17px;color:var(--primary);font-size:20px}
    .related-card{display:grid;grid-template-columns:58px 1fr;gap:12px;padding:13px 0;border-bottom:1px solid #edf1f5}
    .related-card:last-child{border-bottom:0}
    .related-card img{width:58px;height:58px;object-fit:contain;padding:7px;background:var(--soft);border-radius:10px}
    .related-card strong{display:block;font-size:14px;color:var(--ink)}
    .related-card p{margin:3px 0 0;color:var(--muted);font-size:12px;line-height:1.45}
    .product-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .button-primary,.button-secondary{display:inline-flex;align-items:center;justify-content:center;padding:12px 18px;border-radius:10px;font-size:14px;font-weight:800}
    .button-primary{background:var(--primary);color:#fff}
    .button-secondary{background:#e7f8fb;color:#08758a}
    .button-primary:hover{background:var(--teal)}

    .footer{padding:52px 0 20px;background:#10243e;color:#dce8f2}
    .footer .logo{color:#fff}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}
    .footer-brand p{max-width:330px;color:#aebfd0;font-size:13px}
    .footer h3{margin:0 0 14px;color:#fff;font-size:15px}
    .footer-links a,.footer-contact{color:#aebfd0;font-size:13px}
    .footer-links a:hover{color:#fff}
    .footer-contact{display:grid;gap:9px}
    .footer-social{margin-top:17px}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:38px;padding-top:18px;border-top:1px solid rgba(255,255,255,.14);color:#91a8bb;font-size:12px}

    @media(max-width:1080px){
      .main-nav{display:none}
      .hamburger{display:block}
      .product-hero{grid-template-columns:1fr 280px}
    }
    @media(max-width:760px){
      .container{width:min(var(--container),calc(100% - 28px))}
      .topbar-inner{padding:7px 0;align-items:flex-start;flex-direction:column;gap:3px}
      .topbar-contact{gap:12px;flex-wrap:wrap}
      .header-inner{min-height:68px}
      .account-link{display:none}
      .ea-content-stack{padding:30px 0 52px}
      .product-hero{grid-template-columns:1fr;padding:22px;gap:24px}
      .product-hero h1{font-size:34px}
      .product-summary{font-size:15px}
      .product-cover{min-height:210px}
      .product-layout{grid-template-columns:1fr}
      .product-body-wrap,.related-products{padding:22px}
      .related-products{position:static}
      .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
      .footer-bottom{flex-direction:column;gap:7px}
    }
    @media(max-width:480px){
      .footer-grid{grid-template-columns:1fr}
      .product-actions a{width:100%}
    }