:root{
      --theme:#0B3D91;
      --ink:#162033;
      --muted:#667085;
      --line:#e5e9f0;
      --paper:#f6f8fb;
      --white:#fff;
      --shadow:0 16px 40px rgba(15,38,76,.09);
      --radius:16px
    }
    *{box-sizing:border-box}
    html,body{margin:0;padding:0}
    body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--paper);line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    .container{width:min(1180px,calc(100% - 36px));margin:0 auto}
    .topbar{height:36px;background:#10284e;color:#dce7f8;font-size:13px}
    .topbar .container{height:100%;display:flex;align-items:center;justify-content:space-between}
    .topbar a{color:#fff}
    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
    .header-inner{height:76px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;min-width:180px;color:var(--theme);font-weight:800;font-size:18px}
    .logo img{width:34px;height:34px;object-fit:contain}
    .main-nav{flex:1}
    .nav-list{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0}
    .nav-list>li{position:relative}
    .nav-link{display:block;padding:25px 13px;font-size:14px;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--theme)}
    .has-arrow:after{content:"⌄";font-size:12px;margin-left:5px;color:#8b96a8}
    .dropdown-panel,.mega-menu{position:absolute;top:calc(100% + 1px);left:50%;transform:translateX(-50%) translateY(8px);width:300px;padding:20px;background:#fff;border:1px solid var(--line);border-radius:0 0 14px 14px;box-shadow:var(--shadow);opacity:0;visibility:hidden;transition:.2s;z-index:30}
    .mega-menu{width:620px}
    .nav-list>li:hover .dropdown-panel,.nav-list>li:focus-within .dropdown-panel,.nav-list>li:hover .mega-menu,.nav-list>li:focus-within .mega-menu{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}
    .drop-title,.mega-title{margin:0 0 12px;font-size:13px;color:var(--theme);font-weight:800}
    .drop-item{display:block;padding:8px 0;font-size:13px;border-bottom:1px solid #f0f2f5}
    .drop-item:hover{color:var(--theme)}
    .mega-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
    .mega-card{display:flex;gap:9px;padding:9px;border:1px solid #edf0f5;border-radius:10px;background:#fbfcfe;font-size:11px;min-width:0}
    .mega-card img{width:38px;height:38px;object-fit:cover;border-radius:7px;flex:none}
    .mega-card span{display:block;min-width:0}
    .mega-card strong{display:block;font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .mega-card span span{color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .mega-footer{display:block;margin-top:15px;padding-top:12px;border-top:1px solid var(--line);color:var(--theme);font-size:13px;font-weight:700}
    .header-btns{display:flex;align-items:center;gap:10px}
    .member-btn,.open-btn{padding:8px 13px;border-radius:8px;font-size:13px;white-space:nowrap}
    .member-btn{color:var(--theme);border:1px solid #cbd8ec}
    .open-btn{background:var(--theme);color:#fff}
    .hamburger{display:none;border:0;background:transparent;padding:8px;cursor:pointer}
    .hamburger span{display:block;width:23px;height:2px;background:var(--ink);margin:4px 0;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(8,20,42,.48);opacity:0;visibility:hidden;transition:.2s;z-index:50}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;right:0;top:0;bottom:0;width:min(360px,88vw);background:#fff;z-index:51;transform:translateX(100%);transition:.25s;overflow:auto}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{height:70px;display:flex;align-items:center;gap:14px;padding:0 20px;border-bottom:1px solid var(--line);font-weight:700}
    .drawer-head span{flex:1}
    .drawer-head a{background:var(--theme);color:#fff;border-radius:7px;padding:6px 10px;font-size:13px}
    .drawer-close{font-size:27px;border:0;background:none;color:var(--muted);cursor:pointer}
    .drawer-menu{padding:14px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;text-align:left;border:0;background:none;border-bottom:1px solid #f0f2f5;font:inherit;cursor:pointer}
    .drawer-toggle:after{content:"＋";float:right;color:#98a2b3}
    .drawer-toggle.active:after{content:"－"}
    .drawer-submenu{display:none;padding:4px 0 8px 14px;border-bottom:1px solid #f0f2f5}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:7px 0;color:var(--muted);font-size:14px}
    .footer{margin-top:70px;background:#10284e;color:#d5e0f0;padding:48px 0 18px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:35px}
    .footer-brand{font-size:20px;color:#fff;font-weight:800;margin-bottom:12px}
    .footer p{margin:7px 0;color:#b8c8df;font-size:13px}
    .footer h3{margin:0 0 12px;color:#fff;font-size:15px}
    .footer-grid a{display:block;color:#b8c8df;font-size:13px;margin:7px 0}
    .footer-grid a:hover{color:#fff}
    .footer-social{margin-top:14px}
    .footer-bottom{margin-top:35px;padding-top:16px;border-top:1px solid rgba(255,255,255,.15);font-size:12px;color:#aebed4}
    .ea-content-stack{padding:44px 0 20px}
    .product-breadcrumb{font-size:13px;color:var(--muted);margin-bottom:22px}
    .product-breadcrumb a{color:var(--theme)}
    .product-hero{display:grid;grid-template-columns:minmax(260px,420px) minmax(0,1fr);gap:48px;align-items:center;background:#fff;border:1px solid var(--line);border-radius:22px;padding:34px;box-shadow:var(--shadow)}
    .product-image{height:330px;border-radius:16px;background:#f3f6fb;display:flex;align-items:center;justify-content:center;overflow:hidden}
    .product-image img{width:100%;height:100%;object-fit:contain}
    .product-kicker{display:inline-flex;padding:5px 10px;border-radius:99px;background:#eaf1fc;color:var(--theme);font-size:12px;font-weight:700}
    .product-title{font-size:clamp(28px,4vw,46px);line-height:1.2;margin:15px 0 12px;letter-spacing:-.03em}
    .product-summary{font-size:16px;color:var(--muted);margin:0 0 22px}
    .product-meta{display:flex;flex-wrap:wrap;gap:10px 22px;color:var(--muted);font-size:13px;padding-top:18px;border-top:1px solid var(--line)}
    .product-meta b{color:var(--ink);font-weight:700}
    .product-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:26px;margin-top:28px;align-items:start}
    .product-content,.related-products{background:#fff;border:1px solid var(--line);border-radius:18px;padding:28px;box-shadow:0 8px 25px rgba(15,38,76,.04)}
    .section-heading{margin:0 0 20px;font-size:22px}
    .product-body{min-width:0;max-width:100%;overflow-x:auto;color:#374151}
    .product-body img{max-width:100%;height:auto}
    .product-body table{max-width:100%;display:block;overflow-x:auto;border-collapse:collapse}
    .product-body h2,.product-body h3{color:var(--ink);margin-top:26px}
    .product-body a{color:var(--theme);text-decoration:underline}
    .product-info-line{display:flex;justify-content:space-between;padding:11px 0;border-bottom:1px solid #eef1f5;color:var(--muted);font-size:13px}
    .related-products h2{font-size:19px;margin:0 0 14px}
    .related-card{display:block;padding:13px 0;border-bottom:1px solid #eef1f5}
    .related-card:last-child{border-bottom:0}
    .related-card-inner{display:flex;gap:10px}
    .related-card img{width:62px;height:62px;object-fit:cover;border-radius:9px;background:#f3f6fb}
    .related-card strong{display:block;font-size:14px;line-height:1.4}
    .related-card p{margin:4px 0 0;color:var(--muted);font-size:12px;line-height:1.5}
    .related-more{display:inline-block;margin-top:16px;color:var(--theme);font-size:13px;font-weight:700}
    @media(max-width:980px){
      .main-nav{display:none}
      .hamburger{display:block}
      .product-hero{grid-template-columns:1fr;gap:26px}
      .product-image{height:260px}
      .product-layout{grid-template-columns:1fr}
      .footer-grid{grid-template-columns:1fr 1fr}
    }
    @media(max-width:620px){
      .container{width:min(100% - 28px,1180px)}
      .topbar{height:auto;padding:8px 0}
      .topbar .container{display:block}
      .topbar .contact{display:block;margin-top:2px}
      .header-inner{height:68px;gap:8px}
      .logo{min-width:0;flex:1}
      .member-btn{display:none}
      .open-btn{padding:7px 9px}
      .product-hero{padding:20px}
      .product-content,.related-products{padding:20px}
      .product-title{font-size:30px}
      .product-meta{display:block}
      .product-meta span{display:block;margin:5px 0}
      .footer-grid{grid-template-columns:1fr}
      .footer{margin-top:45px;padding-top:35px}
    }