:root{
      --theme:#0B3D91;
      --ink:#172033;
      --muted:#687386;
      --line:#e6eaf0;
      --soft:#f5f7fb;
      --white:#fff;
      --shadow:0 18px 50px rgba(20,42,78,.10);
      --radius:18px
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#fff;font-family:Arial,"Microsoft YaHei","PingFang SC",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:#101827;color:#c8d0dc;font-size:13px}
    .topbar .container{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar-links{display:flex;gap:20px}
    .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:34px}
    .logo{display:flex;align-items:center;gap:10px;flex:0 0 auto;font-size:19px;font-weight:800;color:var(--ink)}
    .logo img{width:38px;height:38px;object-fit:contain}
    .main-nav{margin-left:auto}
    .nav-list{display:flex;align-items:center;gap:4px;padding:0;margin:0;list-style:none}
    .nav-item{position:relative}
    .nav-link{display:block;padding:27px 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:6px;color:#8791a2}
    .dropdown-panel,.mega-menu{position:absolute;top:100%;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 ease}
    .mega-menu{width:620px}
    .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:translateX(-50%) translateY(0)}
    .mega-title{margin:0 0 12px;font-size:13px;color:var(--theme);font-weight:800}
    .dropdown-panel>a:not(.mega-footer){display:block;padding:8px 0;border-bottom:1px solid var(--line);font-size:13px}
    .mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
    .mega-card{display:block;padding:12px;border:1px solid var(--line);border-radius:10px;min-height:80px;background:#fff}
    .mega-card:hover{border-color:var(--theme);background:#f7faff}
    .mega-card img{width:28px;height:28px;object-fit:contain;margin-bottom:6px}
    .mega-card strong{display:block;font-size:13px;line-height:1.4}
    .mega-card small{display:block;color:var(--muted);font-size:11px;line-height:1.5;margin-top:3px}
    .mega-footer{display:block;margin-top:16px;color:var(--theme);font-size:13px;font-weight:700}
    .header-btns{display:flex;align-items:center;gap:12px;white-space:nowrap}
    .member-btn{font-size:13px;color:var(--theme);font-weight:700}
    .open-account{padding:9px 16px;border-radius:8px;background:var(--theme);color:#fff;font-size:13px}
    .hamburger{display:none;border:0;background:none;padding:7px;cursor:pointer}
    .hamburger span{display:block;width:24px;height:2px;background:var(--ink);margin:5px 0;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(4,12,27,.52);z-index:40}
    .drawer-overlay.open{display:block}
    .mobile-drawer{position:fixed;z-index:41;top:0;right:-360px;width:min(360px,88vw);height:100vh;background:#fff;overflow:auto;transition:right .25s ease;box-shadow:-12px 0 40px rgba(0,0,0,.18)}
    .mobile-drawer.open{right:0}
    .drawer-head{display:flex;align-items:center;gap:14px;padding:20px;border-bottom:1px solid var(--line);font-weight:700}
    .drawer-head>a{margin-left:auto;color:var(--theme);font-size:13px}
    .drawer-close{border:0;background:none;font-size:28px;line-height:1;cursor:pointer;color:var(--muted)}
    .drawer-menu{padding:12px 20px 28px}
    .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-size:15px;cursor:pointer}
    .drawer-toggle:after{content:"＋";float:right;color:var(--muted)}
    .drawer-toggle.active:after{content:"－"}
    .drawer-submenu{display:none;padding:5px 0 8px 15px;background:var(--soft)}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 10px;color:var(--muted);font-size:13px}
    .footer{margin-top:80px;background:#101827;color:#c6ceda}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:42px;padding:54px 0 42px}
    .footer h3{margin:0 0 15px;color:#fff;font-size:15px}
    .footer-brand strong{display:block;color:#fff;font-size:20px;margin-bottom:12px}
    .footer p{margin:8px 0;color:#9ca8b9;font-size:13px}
    .footer-grid>div:not(.footer-brand)>a{display:block;margin:8px 0;color:#aeb8c7;font-size:13px}
    .footer-grid a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;padding:18px 0;border-top:1px solid rgba(255,255,255,.12);color:#8793a5;font-size:12px}
    .ea-content-stack{padding:56px 0 20px;background:linear-gradient(180deg,#f7f9fc 0,#fff 38%)}
    .product-breadcrumb{margin-bottom:24px;color:var(--muted);font-size:13px}
    .product-breadcrumb a{color:var(--theme)}
    .product-head{display:grid;grid-template-columns:minmax(260px,390px) 1fr;gap:52px;align-items:center;padding:38px;background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow)}
    .product-cover{display:flex;align-items:center;justify-content:center;min-height:270px;padding:28px;background:linear-gradient(145deg,#f2f6fd,#fff);border-radius:18px}
    .product-cover img{max-height:250px;width:auto;object-fit:contain}
    .product-kicker{display:inline-block;margin-bottom:12px;padding:5px 10px;border-radius:999px;background:#eaf1ff;color:var(--theme);font-size:12px;font-weight:700}
    .product-title{margin:0 0 14px;font-size:clamp(28px,4vw,48px);line-height:1.2;letter-spacing:-.03em}
    .product-summary{margin:0 0 22px;color:var(--muted);font-size:16px}
    .product-meta{display:flex;flex-wrap:wrap;gap:12px 22px;padding-top:18px;border-top:1px solid var(--line);color:var(--muted);font-size:13px}
    .product-meta b{color:var(--ink)}
    .product-layout{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:28px;margin-top:30px}
    .product-panel,.related-panel{background:#fff;border:1px solid var(--line);border-radius:18px;padding:30px}
    .product-panel h2,.related-panel h2{margin:0 0 22px;font-size:21px}
    .product-body{min-width:0;max-width:100%;overflow-x:auto;color:#3e4a5d;font-size:15px}
    .product-body img,.product-body video{max-width:100%;height:auto}
    .product-body table{max-width:100%;display:block;overflow-x:auto;border-collapse:collapse}
    .product-body p{margin:0 0 1.1em}
    .product-body h2,.product-body h3{color:var(--ink)}
    .product-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-bottom:24px}
    .stat-box{padding:14px;border-radius:12px;background:var(--soft)}
    .stat-box span{display:block;color:var(--muted);font-size:12px}
    .stat-box strong{display:block;margin-top:3px;color:var(--theme);font-size:18px}
    .related-card{display:block;padding:14px 0;border-bottom:1px solid var(--line)}
    .related-card:last-child{border-bottom:0}
    .related-card strong{display:block;font-size:14px}
    .related-card p{margin:4px 0 0;color:var(--muted);font-size:12px}
    @media(max-width:1050px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-btns{margin-left:auto}
      .product-head{grid-template-columns:1fr}
      .product-cover{min-height:220px}
    }
    @media(max-width:760px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{padding:8px 0;align-items:flex-start;flex-direction:column;gap:2px}
      .topbar-links{gap:12px;flex-wrap:wrap}
      .header-inner{min-height:66px;gap:10px}
      .member-btn{display:none}
      .open-account{padding:8px 11px}
      .ea-content-stack{padding-top:30px}
      .product-head{padding:22px;border-radius:18px;gap:24px}
      .product-layout{grid-template-columns:1fr}
      .product-panel,.related-panel{padding:22px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:28px;padding:38px 0 28px}
      .footer-bottom{display:block}
      .footer-bottom span{display:block;margin-top:7px}
    }
    @media(max-width:480px){
      .footer-grid{grid-template-columns:1fr}
      .product-title{font-size:31px}
      .product-summary{font-size:14px}
    }