:root{
      --theme:#0B3D91;
      --ink:#172033;
      --muted:#687386;
      --line:#e4e9f1;
      --soft:#f5f7fb;
      --white:#fff;
      --shadow:0 16px 45px rgba(22,39,72,.09);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:#f7f9fc;color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",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:#12213d;color:#dbe6fa;font-size:13px}
    .topbar .container{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:16px}
    .topbar a{margin-left:18px;color:#f0f5ff}

    .header{position:relative;z-index:30;background:var(--white);border-bottom:1px solid var(--line)}
    .header-inner{min-height:76px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;white-space:nowrap;font-weight:800;color:#102754;font-size:19px}
    .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 14px;color:#27334b;font-size:15px;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--theme)}
    .has-arrow:after{content:"⌄";font-size:12px;margin-left:6px;color:#8390a4}
    .dropdown-panel,.mega-menu{
      position:absolute;top:calc(100% + 1px);left:50%;transform:translateX(-50%) translateY(8px);
      width:310px;padding:20px;background:var(--white);border:1px solid var(--line);
      border-radius:0 0 16px 16px;box-shadow:var(--shadow);opacity:0;visibility:hidden;
      transition:.2s ease;z-index:50
    }
    .mega-menu{width:570px}
    .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)}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;top:-12px;left:0;right:0;height:12px}
    .drop-title,.mega-title{margin:0 0 12px;color:var(--theme);font-size:14px;font-weight:800}
    .drop-link{display:block;padding:8px 0;border-bottom:1px solid #eef1f5;color:#34415a;font-size:14px}
    .drop-link:hover{color:var(--theme)}
    .drop-link small{display:block;color:var(--muted);font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .mega-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
    .mega-card{display:flex;gap:10px;padding:10px;border:1px solid #edf0f5;border-radius:12px;background:#fbfcfe}
    .mega-card:hover{border-color:#aac0e7;background:#f4f8ff}
    .mega-card img{width:34px;height:34px;object-fit:contain;flex:0 0 34px}
    .mega-card strong{display:block;font-size:13px;color:#20304d}
    .mega-card small{display:block;color:var(--muted);font-size:11px;line-height:1.45}
    .mega-footer{display:block;margin-top:15px;padding-top:13px;border-top:1px solid var(--line);color:var(--theme);font-size:13px;font-weight:700}
    .header-btns{display:flex;align-items:center;gap:9px;margin-left:10px}
    .member-btn,.open-btn{padding:8px 14px;border-radius:8px;font-size:13px;white-space:nowrap}
    .member-btn{color:var(--theme);border:1px solid #b9c9e4}
    .open-btn{background:var(--theme);color:#fff}
    .hamburger{display:none;border:0;background:transparent;padding:7px;cursor:pointer}
    .hamburger span{display:block;width:24px;height:2px;background:#20304d;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{position:fixed;inset:0;background:rgba(10,22,44,.48);opacity:0;visibility:hidden;transition:.2s;z-index:70}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;top:0;right:0;width:min(380px,88vw);height:100vh;background:#fff;z-index:80;transform:translateX(100%);transition:.25s ease;overflow:auto}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:12px;padding:20px;border-bottom:1px solid var(--line);font-weight:800}
    .drawer-head>a{margin-left:auto;color:var(--theme);font-size:14px}
    .drawer-close{border:0;background:transparent;font-size:28px;line-height:1;color:#738096;cursor:pointer}
    .drawer-menu{padding:10px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 0;border:0;border-bottom:1px solid #edf0f5;background:transparent;text-align:left;color:#26344e;cursor:pointer;font-size:15px}
    .drawer-toggle:after{content:"＋";float:right;color:#8793a7}
    .drawer-toggle.active{color:var(--theme)}
    .drawer-toggle.active:after{content:"－"}
    .drawer-submenu{max-height:0;overflow:hidden;transition:max-height .25s ease;padding-left:15px}
    .drawer-submenu.open{max-height:600px}
    .drawer-submenu a{display:block;padding:9px 0;color:#6a7689;font-size:14px}

    .ea-content-stack{padding:48px 0 80px}
    .product-breadcrumb{margin-bottom:22px;color:#79869a;font-size:13px}
    .product-breadcrumb a{color:var(--theme)}
    .product-hero{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(300px,.95fr);gap:38px;align-items:stretch}
    .product-cover,.product-summary,.product-body-card,.related-products{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}
    .product-cover{min-height:420px;padding:28px;display:flex;align-items:center;justify-content:center;background:linear-gradient(145deg,#f7faff,#edf3fb)}
    .product-cover img{max-height:360px;width:100%;object-fit:contain}
    .product-summary{padding:34px}
    .product-kicker{display:inline-flex;padding:5px 10px;border-radius:999px;background:#eaf1ff;color:var(--theme);font-size:12px;font-weight:700}
    .product-summary h1{margin:18px 0 12px;font-size:clamp(28px,4vw,46px);line-height:1.2;color:#14284e}
    .product-intro{margin:0;color:#657188;font-size:16px}
    .product-meta{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:26px 0}
    .meta-item{padding:13px;background:var(--soft);border-radius:10px}
    .meta-item small{display:block;color:#8590a2;font-size:12px}
    .meta-item strong{display:block;margin-top:2px;color:#263b61;font-size:15px}
    .product-action{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
    .primary-action,.secondary-action{display:inline-flex;align-items:center;justify-content:center;padding:12px 22px;border-radius:9px;font-size:14px;font-weight:700}
    .primary-action{background:var(--theme);color:#fff}
    .secondary-action{border:1px solid #b9c9e4;color:var(--theme)}
    .product-note{margin:18px 0 0;color:#8792a4;font-size:12px}
    .product-lower{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:28px;margin-top:30px}
    .product-body-card{padding:34px;min-width:0}
    .section-heading{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:22px;border-bottom:1px solid var(--line);padding-bottom:14px}
    .section-heading h2{margin:0;font-size:23px;color:#172c52}
    .section-heading span{color:#8490a1;font-size:12px}
    .product-body{min-width:0;max-width:100%;overflow-x:auto;color:#48556b;font-size:15px}
    .product-body img,.product-body video,.product-body iframe{max-width:100%;height:auto}
    .product-body table{max-width:100%;display:block;overflow-x:auto;border-collapse:collapse}
    .product-body table td,.product-body table th{padding:9px 12px;border:1px solid var(--line)}
    .product-body h2,.product-body h3{color:#1b3768;margin-top:28px}
    .product-body blockquote{margin:20px 0;padding:14px 18px;border-left:4px solid var(--theme);background:#f3f7fd;color:#5d6b80}
    .related-products{padding:23px}
    .related-products h2{font-size:20px;margin:0 0 15px;color:#172c52}
    .related-card{display:flex;gap:12px;padding:13px 0;border-bottom:1px solid #edf0f5}
    .related-card:last-child{border-bottom:0}
    .related-card img{width:64px;height:64px;border-radius:10px;object-fit:contain;background:#f3f6fa;flex:0 0 64px}
    .related-card strong{display:block;font-size:14px;color:#263a5d}
    .related-card p{margin:4px 0 0;color:#7b8798;font-size:12px;line-height:1.5}

    .footer{background:#101d36;color:#c6d0e1;padding:48px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.35fr 1fr 1fr 1.1fr;gap:34px}
    .footer h3{margin:0 0 12px;color:#fff;font-size:20px}
    .footer h4{margin:0 0 14px;color:#fff;font-size:15px}
    .footer p{margin:7px 0;color:#aebbd0;font-size:13px}
    .footer-grid>div>a{display:block;margin:7px 0;color:#aebbd0;font-size:13px}
    .footer-grid>div>a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:15px;margin-top:35px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);color:#91a0b8;font-size:12px}

    @media (max-width:980px){
      .main-nav{display:none}
      .hamburger{display:block}
      .product-hero,.product-lower{grid-template-columns:1fr}
      .related-products{display:block}
    }
    @media (max-width:640px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{padding:8px 0;align-items:flex-start;flex-direction:column;gap:2px}
      .topbar a{margin-left:0;margin-right:14px}
      .header-inner{min-height:66px;gap:8px}
      .logo{font-size:16px}
      .logo img{width:32px;height:32px}
      .header-btns{margin-left:auto;gap:5px}
      .member-btn{display:none}
      .open-btn{padding:7px 10px}
      .ea-content-stack{padding:28px 0 55px}
      .product-cover{min-height:280px;padding:18px}
      .product-summary,.product-body-card{padding:22px}
      .product-summary h1{font-size:30px}
      .product-meta{grid-template-columns:1fr 1fr}
      .footer-grid{grid-template-columns:1fr 1fr;gap:25px 18px}
      .footer-grid>div:first-child{grid-column:1/-1}
      .footer-bottom{display:block}
      .footer-bottom span{display:block;margin-top:7px}
    }