:root{
      --theme:#0B3D91;
      --ink:#111827;
      --muted:#64748b;
      --line:#e2e8f0;
      --surface:#ffffff;
      --soft:#f5f8fc;
      --accent:#19b5fe;
      --radius:18px;
      --shadow:0 16px 45px rgba(15,35,70,.10);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:var(--soft);font-family:Arial,"Noto Sans Devanagari",sans-serif;line-height:1.65}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button{font:inherit}
    .container{width:min(1180px,calc(100% - 40px));margin:auto}
    .topbar{background:#071b3f;color:#cbd8ef;font-size:13px}
    .topbar-inner,.header-inner{display:flex;align-items:center;justify-content:space-between}
    .topbar-inner{min-height:38px}
    .topbar-contact{display:flex;gap:22px}
    .topbar a:hover{color:#fff}
    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
    .header-inner{min-height:78px;gap:24px}
    .logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--theme);white-space:nowrap}
    .logo img{width:36px;height:36px;object-fit:contain}
    .main-nav{flex:1}
    .nav-list{display:flex;justify-content:center;align-items:center;gap:3px;margin:0;padding:0;list-style:none}
    .nav-item{position:relative}
    .nav-link{display:block;padding:28px 13px;color:#334155;font-size:14px;font-weight:700}
    .nav-link:hover,.nav-link:focus{color:var(--theme)}
    .dropdown-panel,.mega-menu{position:absolute;top:calc(100% - 1px);left:50%;transform:translateX(-50%) translateY(8px);width:350px;padding:20px;background:#fff;border:1px solid var(--line);border-radius:0 0 16px 16px;box-shadow:var(--shadow);opacity:0;visibility:hidden;transition:.2s;z-index:30}
    .mega-menu{width:min(760px,90vw)}
    .has-panel:after{content:"";position:absolute;left:0;right:0;top:100%;height:14px}
    .has-panel:hover .dropdown-panel,.has-panel:focus-within .dropdown-panel,.has-panel:hover .mega-menu,.has-panel:focus-within .mega-menu{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
    .panel-head,.mega-head{display:flex;justify-content:space-between;align-items:center;gap:14px;margin-bottom:14px;font-size:13px}
    .panel-head a,.mega-head a{color:var(--theme);font-size:12px;font-weight:700}
    .dropdown-articles{display:grid;gap:9px}
    .dropdown-article{padding:10px 12px;border-radius:10px;background:var(--soft);font-size:13px}
    .dropdown-article:hover{background:#e8f1ff;color:var(--theme)}
    .mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
    .mega-card{display:flex;gap:10px;padding:11px;border:1px solid var(--line);border-radius:12px;background:#fbfdff;min-width:0}
    .mega-card:hover{border-color:var(--accent);transform:translateY(-2px)}
    .mega-card img{width:42px;height:42px;object-fit:cover;border-radius:9px;flex:0 0 42px}
    .mega-card strong{display:block;font-size:13px;line-height:1.35}
    .mega-card p{margin:4px 0 0;color:var(--muted);font-size:11px;line-height:1.4}
    .mini-meta{display:flex;flex-wrap:wrap;gap:6px;margin-top:5px;color:var(--muted);font-size:10px}
    .mini-meta b{color:var(--theme)}
    .mega-categories{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:14px}
    .mega-categories a{padding:5px 9px;border-radius:99px;background:#eef4ff;color:var(--theme);font-size:11px}
    .header-btns{display:flex;align-items:center;gap:12px;white-space:nowrap}
    .header-btns>a{padding:10px 14px;border-radius:9px;background:var(--theme);color:#fff;font-size:13px;font-weight:700}
    .header-btns>a:hover{background:#082e70}
    .hamburger{display:none;border:0;background:transparent;padding:7px;cursor:pointer}
    .hamburger span{display:block;width:23px;height:2px;margin:5px 0;background:var(--ink);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{display:none;position:fixed;inset:0;background:rgba(2,12,30,.58);z-index:80}
    .drawer-overlay.open{display:block}
    .mobile-drawer{position:fixed;top:0;right:0;bottom:0;width:min(390px,92vw);background:#fff;z-index:90;transform:translateX(100%);transition:.28s;overflow:auto;box-shadow:-14px 0 45px rgba(0,0,0,.18)}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:13px;padding:20px;border-bottom:1px solid var(--line);color:var(--theme);font-weight:800}
    .drawer-head>a{margin-left:auto;padding:8px 10px;border-radius:8px;background:var(--theme);color:#fff;font-size:12px}
    .drawer-close{border:0;background:transparent;font-size:28px;line-height:1;color:var(--muted);cursor:pointer}
    .drawer-menu{padding:12px 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;color:var(--ink);font-weight:700;cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--theme);font-size:20px}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{display:none;padding:5px 0 8px 14px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:9px 0;color:var(--muted);font-size:13px}
    .drawer-submenu a:hover{color:var(--theme)}
    .drawer-locked{overflow:hidden}
    .product-page{padding:54px 0 80px}
    .product-breadcrumb{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px;color:var(--muted);font-size:13px}
    .product-breadcrumb a{color:var(--theme)}
    .product-hero{display:grid;grid-template-columns:minmax(280px,430px) minmax(0,1fr);gap:48px;align-items:center;padding:38px;background:#fff;border:1px solid var(--line);border-radius:26px;box-shadow:var(--shadow)}
    .product-image-wrap{min-height:300px;display:grid;place-items:center;padding:30px;border-radius:22px;background:radial-gradient(circle at 50% 40%,#dff4ff 0,#edf3ff 40%,#f6f8fc 72%);border:1px solid #dbeafe}
    .product-image-wrap img{max-height:320px;width:auto;object-fit:contain;border-radius:16px}
    .product-category{display:inline-flex;padding:7px 12px;border-radius:99px;background:#eaf2ff;color:var(--theme);font-size:12px;font-weight:800}
    .product-title{margin:15px 0 13px;font-size:clamp(30px,4vw,53px);line-height:1.12;letter-spacing:-1px}
    .product-summary{margin:0;color:#526176;font-size:17px;max-width:680px}
    .product-stats{display:flex;flex-wrap:wrap;gap:20px;margin:26px 0;padding:18px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
    .product-stat strong{display:block;color:var(--theme);font-size:20px}
    .product-stat span{display:block;color:var(--muted);font-size:12px}
    .product-actions{display:flex;flex-wrap:wrap;gap:12px}
    .primary-btn,.secondary-btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 19px;border-radius:10px;font-size:14px;font-weight:800}
    .primary-btn{background:var(--theme);color:#fff}
    .secondary-btn{border:1px solid #b8cbe8;color:var(--theme);background:#fff}
    .primary-btn:hover{background:#082e70}
    .secondary-btn:hover{background:#eef5ff}
    .product-content-grid{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px;margin-top:30px}
    .product-content-card,.related-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:30px;box-shadow:0 8px 25px rgba(15,35,70,.05)}
    .product-content-card h2,.related-card h2{margin:0 0 20px;font-size:24px}
    .product-body{min-width:0;max-width:100%;overflow-x:auto;color:#435269}
    .product-body img,.product-body table{max-width:100%}
    .product-body h1,.product-body h2,.product-body h3{color:var(--ink)}
    .product-body a{color:var(--theme);text-decoration:underline}
    .product-meta{display:grid;gap:14px;margin:0}
    .product-meta div{padding-bottom:12px;border-bottom:1px solid var(--line)}
    .product-meta dt{color:var(--muted);font-size:12px}
    .product-meta dd{margin:3px 0 0;font-weight:700}
    .related-products{display:grid;gap:13px}
    .related-product{display:flex;gap:10px;padding:10px;border:1px solid var(--line);border-radius:12px}
    .related-product img{width:54px;height:54px;object-fit:cover;border-radius:9px}
    .related-product strong{font-size:13px;line-height:1.35}
    .related-product p{margin:3px 0;color:var(--muted);font-size:11px}
    .footer{background:#071b3f;color:#c8d4e9}
    .footer-main{padding:55px 0 42px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:35px}
    .footer .logo{color:#fff}
    .footer-brand p{max-width:310px;margin:17px 0;color:#a8b9d3;font-size:13px}
    .footer h3{margin:0 0 15px;color:#fff;font-size:15px}
    .footer-links,.footer-contact{display:grid;gap:9px;font-size:13px}
    .footer-links a:hover,.footer-contact a:hover{color:#7dd3fc}
    .footer-contact span{color:#9eb2cf;font-size:12px}
    .footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:17px 0}
    .footer-bottom-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;font-size:12px;color:#9eb2cf}
    .footer-legal{display:flex;gap:18px}
    .footer-legal a:hover{color:#fff}
    @media(max-width:1050px){
      .nav-link{padding-left:8px;padding-right:8px}
      .header-inner{gap:10px}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:820px){
      .topbar-inner{padding:8px 0;align-items:flex-start;gap:8px}
      .topbar-contact{flex-direction:column;gap:2px;text-align:right}
      .main-nav{display:none}
      .header-btns>a{display:none}
      .hamburger{display:block}
      .product-page{padding:30px 0 55px}
      .product-hero{grid-template-columns:1fr;gap:25px;padding:22px}
      .product-image-wrap{min-height:230px}
      .product-content-grid{grid-template-columns:1fr}
    }
    @media(max-width:560px){
      .container{width:min(100% - 28px,1180px)}
      .topbar{font-size:11px}
      .topbar-welcome{max-width:50%}
      .product-title{font-size:34px}
      .product-summary{font-size:15px}
      .product-content-card,.related-card{padding:21px}
      .footer-grid{grid-template-columns:1fr;gap:28px}
      .footer-bottom-inner{align-items:flex-start;flex-direction:column}
    }