:root{--primary:#0B3D91;--ink:#10233f;--muted:#65748a;--line:#dce5ef;--ice:#eef6fc;--white:#fff;--shadow:0 16px 45px rgba(18,54,91,.11)}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#f6f9fc;font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    button{font:inherit}
    .container{width:min(1180px,calc(100% - 40px));margin:0 auto}
    .topbar{background:#092b65;color:#dcecff;font-size:13px}
    .topbar-inner{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .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:76px;display:flex;align-items:center;gap:30px}
    .logo{display:flex;align-items:center;gap:10px;white-space:nowrap;font-size:20px;font-weight:800;color:var(--primary)}
    .logo img{width:38px;height:38px;object-fit:contain}
    .main-nav{margin-left:auto}
    .nav-list{display:flex;align-items:center;gap:4px;list-style:none;padding:0;margin:0}
    .nav-item{position:relative}
    .nav-link{display:block;padding:25px 13px;color:#243b5a;font-size:14px;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--primary)}
    .has-arrow:after{content:"";display:inline-block;width:6px;height:6px;margin:0 0 3px 7px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;transform:rotate(45deg)}
    .dropdown-panel,.mega-menu{position:absolute;top:calc(100% + 1px);left:50%;width:350px;padding:22px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);opacity:0;visibility:hidden;transform:translate(-50%,8px);transition:.2s;z-index:30}
    .mega-menu{width:720px}
    .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;transform:translate(-50%,0)}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;top:-12px;left:0;right:0;height:12px}
    .panel-title{margin:0 0 13px;color:var(--primary);font-size:15px}
    .panel-list{display:grid;gap:8px;margin:0;padding:0}
    .panel-list a{font-size:13px;color:#4b607a}
    .panel-list a:hover,.mega-card:hover strong{color:var(--primary)}
    .mega-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px}
    .mega-card{display:flex;gap:10px;padding:8px 0;border-bottom:1px solid #edf1f5}
    .mega-card img{width:36px;height:36px;object-fit:cover;flex:0 0 36px}
    .mega-card span{min-width:0}
    .mega-card strong,.mega-card small{display:block}
    .mega-card strong{font-size:13px}
    .mega-card small{font-size:11px;color:var(--muted);line-height:1.5}
    .mega-footer{display:block;margin-top:17px;padding-top:13px;border-top:1px solid var(--line);color:var(--primary);font-size:13px;font-weight:700}
    .header-btns{display:flex;align-items:center;gap:10px}
    .member-btn,.open-account{padding:8px 13px;font-size:13px;border-radius:3px}
    .member-btn{color:var(--primary);border:1px solid #b8cde7}
    .open-account{background:var(--primary);color:#fff}
    .hamburger{display:none;width:40px;height:38px;border:1px solid var(--line);background:#fff;padding:8px;cursor:pointer}
    .hamburger span{display:block;height:2px;margin:4px 0;background:var(--primary);transition:.2s}
    .hamburger.active span:first-child{transform:translateY(6px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:last-child{transform:translateY(-6px) rotate(-45deg)}
    .drawer-overlay{position:fixed;inset:0;background:rgba(6,27,57,.45);opacity:0;visibility:hidden;transition:.2s;z-index:40}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;top:0;right:-360px;width:min(360px,88vw);height:100vh;background:#fff;z-index:41;overflow:auto;transition:.25s;box-shadow:-12px 0 30px rgba(0,0,0,.16)}
    .mobile-drawer.open{right:0}
    .drawer-head{display:flex;align-items:center;gap:12px;padding:18px;border-bottom:1px solid var(--line);color:var(--primary);font-weight:700}
    .drawer-head span{margin-right:auto}
    .drawer-head a{font-size:13px;color:var(--primary)}
    .drawer-close{border:0;background:transparent;font-size:25px;line-height:1;color:#52657c;cursor:pointer}
    .drawer-menu{padding:10px 18px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid #edf1f5;background:transparent;text-align:left;color:var(--ink);font-size:15px;cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--primary);font-size:19px}
    .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:7px 0;color:var(--muted);font-size:13px}
    .footer{margin-top:80px;background:#0a2349;color:#c2d0e3}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:35px;padding:48px 0 38px}
    .footer strong{color:#fff;font-size:20px}
    .footer h3{margin:0 0 15px;color:#fff;font-size:15px}
    .footer p{margin:7px 0;font-size:13px}
    .footer-grid>div:not(.footer-brand) a{display:block;margin:7px 0;font-size:13px;color:#c2d0e3}
    .footer-grid a:hover{color:#fff}
    .footer-bottom{padding:18px 0;border-top:1px solid rgba(255,255,255,.14);font-size:12px;text-align:center;color:#9fb1c9}
    .ea-content-stack{padding:54px 0 0;min-width:0}
    .product-breadcrumb{margin-bottom:20px;color:var(--muted);font-size:13px}
    .product-breadcrumb a{color:var(--primary)}
    .product-intro{display:grid;grid-template-columns:minmax(280px,420px) minmax(0,1fr);gap:46px;align-items:center;padding:35px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow)}
    .product-cover{display:flex;align-items:center;justify-content:center;min-height:300px;background:var(--ice);border:1px solid #d9e8f5}
    .product-cover img{width:100%;max-height:300px;object-fit:contain}
    .product-summary h1{margin:0 0 13px;font-size:clamp(28px,4vw,44px);line-height:1.25;color:#0b2855}
    .product-summary .summary{margin:0 0 22px;color:var(--muted);font-size:16px}
    .product-meta{display:flex;flex-wrap:wrap;gap:10px 22px;padding:17px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);font-size:13px;color:var(--muted)}
    .product-meta strong{color:var(--ink)}
    .product-action{display:flex;gap:12px;margin-top:22px}
    .primary-action,.secondary-action{display:inline-flex;align-items:center;justify-content:center;padding:11px 22px;border-radius:3px;font-size:14px;font-weight:700}
    .primary-action{background:var(--primary);color:#fff}
    .secondary-action{border:1px solid #bdd0e5;color:var(--primary);background:#fff}
    .product-layout{display:grid;grid-template-columns:minmax(0,1fr) 285px;gap:30px;margin-top:30px;align-items:start}
    .product-content,.related-products{background:#fff;border:1px solid var(--line)}
    .product-content{padding:32px;min-width:0;max-width:100%;overflow-x:auto}
    .product-content h2{margin:0 0 22px;padding-bottom:14px;border-bottom:2px solid var(--primary);font-size:22px;color:#0b2855}
    .product-body{min-width:0;max-width:100%;overflow-x:auto;color:#425570}
    .product-body img,.product-body table{max-width:100%}
    .product-body table{border-collapse:collapse}
    .product-body td,.product-body th{padding:8px;border:1px solid var(--line)}
    .product-body h3{color:var(--ink)}
    .product-side-title{margin:0;padding:20px;border-bottom:1px solid var(--line);font-size:17px;color:#0b2855}
    .related-list{padding:8px 20px 20px}
    .related-card{display:block;padding:15px 0;border-bottom:1px solid #edf1f5}
    .related-card:last-child{border-bottom:0}
    .related-card img{width:58px;height:58px;float:left;margin-right:11px;object-fit:cover;background:var(--ice)}
    .related-card strong{display:block;font-size:14px;color:var(--ink)}
    .related-card p{margin:4px 0 0;color:var(--muted);font-size:12px;line-height:1.5}
    .related-card:after{content:"";display:block;clear:both}
    @media(max-width:1050px){
      .main-nav{display:none}
      .hamburger{display:block}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:760px){
      .container{width:min(100% - 28px,1180px)}
      .topbar-inner{padding:7px 0;align-items:flex-start}
      .topbar-contact{gap:8px;flex-direction:column;text-align:right}
      .header-inner{min-height:66px;gap:12px}
      .header-btns{margin-left:auto}
      .member-btn{display:none}
      .mega-grid{grid-template-columns:1fr}
      .product-intro,.product-layout{grid-template-columns:1fr}
      .product-intro{padding:20px;gap:25px}
      .product-cover{min-height:220px}
      .product-content{padding:22px}
      .footer-grid{grid-template-columns:1fr;gap:24px}
      .footer{margin-top:55px}
    }