:root{
      --primary:#0B3D91;
      --primary-dark:#06285f;
      --primary-light:#eaf1ff;
      --accent:#13c8ff;
      --ink:#10213a;
      --muted:#66758b;
      --line:#dfe6f0;
      --surface:#ffffff;
      --surface-soft:#f5f8fc;
      --footer:#07162c;
      --radius:18px;
      --shadow:0 18px 48px rgba(10,38,82,.12);
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:#fff;
      font-family:"Microsoft YaHei","PingFang SC","Noto Sans SC",Arial,sans-serif;
      line-height:1.7;
      overflow-x:hidden;
    }
    body,button,input,textarea,select{font:inherit}
    img{display:block;max-width:100%}
    a{color:inherit;text-decoration:none}
    button{color:inherit}
    .container{width:min(1200px,calc(100% - 40px));margin:0 auto}

    .topbar{
      position:relative;
      z-index:1002;
      color:#dce9ff;
      background:#061a3a;
      font-size:13px;
    }
    .topbar-inner{
      min-height:36px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
    }
    .topbar-links{display:flex;align-items:center;gap:24px}
    .topbar a{transition:color .2s ease}
    .topbar a:hover{color:#fff}

    .header{
      position:relative;
      z-index:1000;
      background:rgba(255,255,255,.98);
      border-bottom:1px solid rgba(11,61,145,.1);
      box-shadow:0 5px 20px rgba(16,33,58,.04);
    }
    .header-inner{
      min-height:78px;
      display:flex;
      align-items:center;
      gap:28px;
    }
    .logo{
      flex:0 0 auto;
      display:flex;
      align-items:center;
      gap:11px;
      color:var(--primary-dark);
      font-size:19px;
      font-weight:800;
      white-space:nowrap;
    }
    .logo img{
      width:42px;
      height:42px;
      object-fit:contain;
      border-radius:10px;
    }
    .main-nav{align-self:stretch;min-width:0;margin-left:auto}
    .nav-list{
      height:100%;
      display:flex;
      align-items:stretch;
      gap:2px;
      margin:0;
      padding:0;
      list-style:none;
    }
    .nav-item{
      position:relative;
      display:flex;
      align-items:center;
    }
    .nav-link{
      height:100%;
      display:flex;
      align-items:center;
      padding:0 12px;
      color:#263a55;
      font-size:15px;
      font-weight:650;
      white-space:nowrap;
      transition:color .2s ease,background .2s ease;
    }
    .nav-link:hover,
    .nav-item:focus-within>.nav-link{
      color:var(--primary);
      background:var(--primary-light);
    }
    .has-arrow::after{
      content:"";
      width:6px;
      height:6px;
      margin:0 0 4px 7px;
      border-right:1.5px solid currentColor;
      border-bottom:1.5px solid currentColor;
      transform:rotate(45deg);
      transition:transform .2s ease;
    }
    .nav-item:hover .has-arrow::after,
    .nav-item:focus-within .has-arrow::after{
      transform:translateY(3px) rotate(225deg);
    }
    .dropdown-panel,
    .mega-menu{
      position:absolute;
      top:100%;
      left:0;
      z-index:50;
      visibility:hidden;
      opacity:0;
      pointer-events:none;
      transform:translateY(10px);
      transition:opacity .18s ease,transform .18s ease,visibility .18s ease;
      background:#fff;
      border:1px solid var(--line);
      border-top:3px solid var(--primary);
      box-shadow:0 22px 60px rgba(14,38,73,.16);
    }
    .dropdown-panel::before,
    .mega-menu::before{
      content:"";
      position:absolute;
      left:0;
      right:0;
      top:-12px;
      height:12px;
    }
    .nav-item:hover>.dropdown-panel,
    .nav-item:focus-within>.dropdown-panel,
    .nav-item:hover>.mega-menu,
    .nav-item:focus-within>.mega-menu{
      visibility:visible;
      opacity:1;
      pointer-events:auto;
      transform:translateY(0);
    }
    .dropdown-panel{
      width:310px;
      padding:18px;
      border-radius:0 0 14px 14px;
    }
    .dropdown-title,
    .mega-heading{
      margin-bottom:12px;
      color:var(--primary-dark);
      font-size:15px;
      font-weight:800;
    }
    .dropdown-panel>a{
      display:block;
      padding:9px 10px;
      color:#45566d;
      font-size:14px;
      border-radius:8px;
    }
    .dropdown-panel>a:hover{color:var(--primary);background:var(--primary-light)}
    .mega-menu{
      left:50%;
      width:min(760px,calc(100vw - 40px));
      padding:24px;
      border-radius:0 0 18px 18px;
      transform:translate(-50%,10px);
    }
    .nav-item:hover>.mega-menu,
    .nav-item:focus-within>.mega-menu{transform:translate(-50%,0)}
    .nav-item:nth-last-child(-n+3) .mega-menu{
      left:auto;
      right:0;
      transform:translateY(10px);
    }
    .nav-item:nth-last-child(-n+3):hover>.mega-menu,
    .nav-item:nth-last-child(-n+3):focus-within>.mega-menu{transform:translateY(0)}
    .mega-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:28px}
    .mega-list{display:grid;gap:8px}
    .mega-list>a{
      display:grid;
      grid-template-columns:42px minmax(0,1fr);
      align-items:center;
      gap:11px;
      padding:8px;
      border-radius:10px;
      transition:background .2s ease;
    }
    .mega-list>a:hover{background:var(--primary-light)}
    .mega-list img{
      width:42px;
      height:42px;
      object-fit:cover;
      border:1px solid var(--line);
      border-radius:9px;
      background:#fff;
    }
    .mega-list a>span{min-width:0}
    .mega-item-title{
      display:block;
      overflow:hidden;
      color:#263a55;
      font-size:14px;
      font-weight:750;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .mega-item-meta{
      display:block;
      overflow:hidden;
      color:#7a8798;
      font-size:12px;
      line-height:1.45;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .mega-categories{display:flex;flex-wrap:wrap;gap:9px}
    .mega-categories a,
    .mega-tools span{
      padding:7px 11px;
      color:#405570;
      background:#f3f6fa;
      border:1px solid var(--line);
      border-radius:999px;
      font-size:13px;
    }
    .mega-categories a:hover{color:#fff;background:var(--primary);border-color:var(--primary)}
    .mega-tools{display:flex;flex-wrap:wrap;gap:8px}
    .mega-footer{
      display:inline-flex;
      margin-top:18px;
      color:var(--primary);
      font-size:14px;
      font-weight:750;
    }
    .header-btns{
      flex:0 0 auto;
      display:flex;
      align-items:center;
      gap:10px;
    }
    .member-link{
      color:var(--primary);
      font-size:14px;
      font-weight:700;
      white-space:nowrap;
    }
    .account-btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:42px;
      padding:0 17px;
      color:#fff;
      background:linear-gradient(135deg,var(--primary),#1266c8);
      border-radius:10px;
      box-shadow:0 10px 22px rgba(11,61,145,.22);
      font-size:14px;
      font-weight:750;
      white-space:nowrap;
    }
    .hamburger{
      width:42px;
      height:42px;
      display:none;
      align-items:center;
      justify-content:center;
      flex-direction:column;
      gap:5px;
      padding:0;
      background:#fff;
      border:1px solid var(--line);
      border-radius:10px;
      cursor:pointer;
    }
    .hamburger span{
      width:19px;
      height:2px;
      background:var(--primary-dark);
      transition:transform .2s ease,opacity .2s ease;
    }
    .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;
      z-index:1098;
      visibility:hidden;
      opacity:0;
      background:rgba(3,15,35,.58);
      backdrop-filter:blur(3px);
      transition:opacity .25s ease,visibility .25s ease;
    }
    .drawer-overlay.open{visibility:visible;opacity:1}
    .mobile-drawer{
      position:fixed;
      top:0;
      right:0;
      z-index:1099;
      width:min(390px,90vw);
      height:100%;
      overflow-y:auto;
      background:#fff;
      box-shadow:-20px 0 60px rgba(3,15,35,.2);
      transform:translateX(105%);
      transition:transform .28s ease;
    }
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{
      min-height:72px;
      display:flex;
      align-items:center;
      gap:12px;
      padding:14px 18px;
      color:#fff;
      background:linear-gradient(135deg,var(--primary-dark),var(--primary));
    }
    .drawer-head>span{font-weight:750}
    .drawer-head>a{
      margin-left:auto;
      padding:6px 13px;
      color:var(--primary-dark);
      background:#fff;
      border-radius:999px;
      font-size:13px;
      font-weight:750;
    }
    .drawer-close{
      width:34px;
      height:34px;
      padding:0;
      color:#fff;
      background:rgba(255,255,255,.12);
      border:1px solid rgba(255,255,255,.25);
      border-radius:50%;
      font-size:25px;
      line-height:1;
      cursor:pointer;
    }
    .drawer-menu{padding:14px 18px 28px}
    .drawer-link,
    .drawer-toggle{
      width:100%;
      display:flex;
      align-items:center;
      justify-content:space-between;
      padding:14px 4px;
      color:#233853;
      background:transparent;
      border:0;
      border-bottom:1px solid var(--line);
      font-size:15px;
      font-weight:750;
      text-align:left;
      cursor:pointer;
    }
    .drawer-toggle::after{
      content:"+";
      color:var(--primary);
      font-size:20px;
      font-weight:400;
    }
    .drawer-toggle.active::after{content:"−"}
    .drawer-submenu{
      max-height:0;
      overflow:hidden;
      padding:0 10px;
      background:var(--surface-soft);
      border-radius:0 0 10px 10px;
      transition:max-height .28s ease,padding .28s ease;
    }
    .drawer-submenu.open{max-height:720px;padding:8px 10px}
    .drawer-submenu a{
      display:block;
      padding:9px 8px;
      color:#5c6e84;
      font-size:14px;
      border-bottom:1px dashed #dce3ec;
    }
    .drawer-submenu a:last-child{border-bottom:0}

    .ea-content-stack{
      min-width:0;
      padding-bottom:76px;
      background:
        radial-gradient(circle at 80% 8%,rgba(19,200,255,.09),transparent 26%),
        linear-gradient(180deg,#f3f7fd 0,#fff 440px);
    }
    .ea-content-stack .product-crumb{
      display:flex;
      align-items:center;
      flex-wrap:wrap;
      gap:8px;
      padding:22px 0;
      color:#708096;
      font-size:14px;
    }
    .ea-content-stack .product-crumb a{color:var(--primary);font-weight:650}
    .ea-content-stack .product-crumb span::before{
      content:"/";
      margin-right:8px;
      color:#a6b1c0;
    }
    .ea-content-stack .product-intro{
      position:relative;
      overflow:hidden;
      display:grid;
      grid-template-columns:minmax(300px,.82fr) minmax(0,1.18fr);
      gap:42px;
      align-items:center;
      padding:42px;
      color:#fff;
      background:
        radial-gradient(circle at 85% 15%,rgba(19,200,255,.28),transparent 25%),
        linear-gradient(135deg,#061a3a 0%,#0B3D91 58%,#0875b8 100%);
      border:1px solid rgba(255,255,255,.12);
      border-radius:28px;
      box-shadow:0 28px 70px rgba(5,34,80,.22);
    }
    .ea-content-stack .product-intro::after{
      content:"";
      position:absolute;
      right:-110px;
      bottom:-150px;
      width:350px;
      height:350px;
      border:1px solid rgba(255,255,255,.16);
      border-radius:50%;
      box-shadow:0 0 0 50px rgba(255,255,255,.035),0 0 0 100px rgba(255,255,255,.025);
      pointer-events:none;
    }
    .ea-content-stack .product-cover{
      position:relative;
      z-index:1;
      padding:18px;
      background:rgba(255,255,255,.1);
      border:1px solid rgba(255,255,255,.19);
      border-radius:22px;
      backdrop-filter:blur(12px);
    }
    .ea-content-stack .product-cover img{
      width:100%;
      aspect-ratio:4/3;
      object-fit:cover;
      background:#eaf1ff;
      border-radius:15px;
      box-shadow:0 18px 44px rgba(0,0,0,.22);
    }
    .ea-content-stack .product-summary{position:relative;z-index:2;min-width:0}
    .ea-content-stack .product-kicker{
      display:inline-flex;
      align-items:center;
      gap:7px;
      padding:6px 12px;
      color:#dff8ff;
      background:rgba(19,200,255,.13);
      border:1px solid rgba(94,222,255,.34);
      border-radius:999px;
      font-size:13px;
      font-weight:700;
    }
    .ea-content-stack .product-kicker::before{
      content:"";
      width:7px;
      height:7px;
      background:#28dcff;
      border-radius:50%;
      box-shadow:0 0 14px #28dcff;
    }
    .ea-content-stack h1{
      margin:18px 0 14px;
      color:#fff;
      font-size:clamp(32px,4.3vw,56px);
      line-height:1.16;
      letter-spacing:-.03em;
      overflow-wrap:anywhere;
    }
    .ea-content-stack .lead{
      max-width:760px;
      margin:0;
      color:#d8e5f8;
      font-size:17px;
      line-height:1.9;
      overflow-wrap:anywhere;
    }
    .ea-content-stack .product-meta{
      display:flex;
      flex-wrap:wrap;
      gap:9px;
      margin-top:24px;
    }
    .ea-content-stack .product-meta span{
      padding:7px 11px;
      color:#e2edff;
      background:rgba(255,255,255,.09);
      border:1px solid rgba(255,255,255,.16);
      border-radius:9px;
      font-size:13px;
    }
    .ea-content-stack .product-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:28px;
    }
    .ea-content-stack .primary-action,
    .ea-content-stack .secondary-action{
      min-height:48px;
      display:inline-flex;
      align-items:center;
      justify-content:center;
      padding:0 20px;
      border-radius:11px;
      font-size:15px;
      font-weight:800;
      transition:transform .2s ease,background .2s ease;
    }
    .ea-content-stack .primary-action{
      color:var(--primary-dark);
      background:#fff;
      box-shadow:0 12px 28px rgba(0,0,0,.16);
    }
    .ea-content-stack .secondary-action{
      color:#fff;
      background:rgba(255,255,255,.08);
      border:1px solid rgba(255,255,255,.28);
    }
    .ea-content-stack .primary-action:hover,
    .ea-content-stack .secondary-action:hover{transform:translateY(-2px)}
    .ea-content-stack .detail-layout{
      min-width:0;
      display:grid;
      grid-template-columns:minmax(0,1fr) 310px;
      gap:28px;
      align-items:start;
      margin-top:34px;
    }
    .ea-content-stack .content-panel,
    .ea-content-stack .side-card{
      min-width:0;
      background:#fff;
      border:1px solid var(--line);
      border-radius:20px;
      box-shadow:var(--shadow);
    }
    .ea-content-stack .content-panel{padding:34px}
    .ea-content-stack .content-heading{
      display:flex;
      align-items:center;
      gap:13px;
      margin:0 0 24px;
      color:#112945;
      font-size:25px;
      line-height:1.3;
    }
    .ea-content-stack .content-heading::before{
      content:"";
      width:5px;
      height:27px;
      background:linear-gradient(180deg,var(--accent),var(--primary));
      border-radius:99px;
    }
    .ea-content-stack .product-body{
      min-width:0;
      max-width:100%;
      overflow-x:auto;
      color:#344b67;
      font-size:16px;
      overflow-wrap:anywhere;
    }
    .ea-content-stack .product-body img,
    .ea-content-stack .product-body video,
    .ea-content-stack .product-body iframe{
      max-width:100%;
      height:auto;
    }
    .ea-content-stack .product-body table{
      width:100%;
      max-width:100%;
      border-collapse:collapse;
    }
    .ea-content-stack .product-body th,
    .ea-content-stack .product-body td{
      padding:10px 12px;
      border:1px solid var(--line);
    }
    .ea-content-stack .product-body a{color:var(--primary);text-decoration:underline}
    .ea-content-stack .product-body h2,
    .ea-content-stack .product-body h3{
      color:#142d4c;
      line-height:1.4;
    }
    .ea-content-stack .sidebar{
      position:sticky;
      top:20px;
      display:grid;
      gap:18px;
    }
    .ea-content-stack .side-card{padding:23px}
    .ea-content-stack .side-card h2{
      margin:0 0 16px;
      color:#173251;
      font-size:19px;
    }
    .ea-content-stack .info-list{
      display:grid;
      gap:0;
      margin:0;
    }
    .ea-content-stack .info-row{
      display:grid;
      grid-template-columns:76px minmax(0,1fr);
      gap:12px;
      padding:11px 0;
      border-bottom:1px solid #e8edf4;
      font-size:14px;
    }
    .ea-content-stack .info-row:last-child{border-bottom:0}
    .ea-content-stack .info-row dt{color:#7a8798}
    .ea-content-stack .info-row dd{
      min-width:0;
      margin:0;
      color:#2d425c;
      font-weight:650;
      overflow-wrap:anywhere;
    }
    .ea-content-stack .notice{
      color:#546a84;
      background:linear-gradient(145deg,#f8fbff,#eef5ff);
      border-left:4px solid var(--primary);
      box-shadow:none;
    }
    .ea-content-stack .notice p{margin:0;font-size:14px}
    .ea-content-stack .related-section{margin-top:58px}
    .ea-content-stack .section-head{
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:20px;
      margin-bottom:22px;
    }
    .ea-content-stack .section-head h2{
      margin:0;
      color:#112945;
      font-size:30px;
    }
    .ea-content-stack .section-head p{margin:0;color:var(--muted)}
    .ea-content-stack .related-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:20px;
    }
    .ea-content-stack .related-card{
      min-width:0;
      overflow:hidden;
      background:#fff;
      border:1px solid var(--line);
      border-radius:17px;
      box-shadow:0 12px 34px rgba(17,45,82,.08);
      transition:transform .22s ease,box-shadow .22s ease;
    }
    .ea-content-stack .related-card:hover{
      transform:translateY(-5px);
      box-shadow:0 20px 44px rgba(17,45,82,.14);
    }
    .ea-content-stack .related-card img{
      width:100%;
      aspect-ratio:16/10;
      object-fit:cover;
      background:#eef3fa;
    }
    .ea-content-stack .related-card-body{padding:18px}
    .ea-content-stack .related-card h3{
      margin:0 0 8px;
      color:#183452;
      font-size:18px;
      line-height:1.45;
      overflow-wrap:anywhere;
    }
    .ea-content-stack .related-card p{
      display:-webkit-box;
      min-height:50px;
      margin:0;
      overflow:hidden;
      color:#68788d;
      font-size:14px;
      line-height:1.75;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }
    .ea-content-stack .related-meta{
      display:flex;
      justify-content:space-between;
      gap:10px;
      margin-top:15px;
      color:#8793a4;
      font-size:12px;
    }
    .ea-content-stack .related-link{
      display:inline-flex;
      margin-top:13px;
      color:var(--primary);
      font-size:14px;
      font-weight:800;
    }

    .footer{
      color:#c6d3e6;
      background:
        radial-gradient(circle at 10% 15%,rgba(19,200,255,.08),transparent 22%),
        var(--footer);
    }
    .footer .container{padding-top:58px}
    .footer-grid{
      display:grid;
      grid-template-columns:1.35fr .85fr .85fr 1fr;
      gap:42px;
      padding-bottom:42px;
    }
    .footer-brand img{
      width:50px;
      height:50px;
      object-fit:contain;
      padding:5px;
      background:#fff;
      border-radius:12px;
    }
    .footer-brand h3{margin:13px 0 7px;color:#fff;font-size:20px}
    .footer-brand p{max-width:340px;margin:0;color:#91a3bc;font-size:14px}
    .footer h4{margin:0 0 15px;color:#fff;font-size:16px}
    .footer-links,
    .footer-contact{display:grid;gap:9px}
    .footer-links a,
    .footer-contact span{
      color:#9cafc7;
      font-size:14px;
      overflow-wrap:anywhere;
    }
    .footer-links a:hover{color:#fff}
    .footer-bottom{
      min-height:70px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:24px;
      padding:18px 0;
      border-top:1px solid rgba(255,255,255,.1);
      color:#8296b0;
      font-size:13px;
    }

    @media (max-width:1100px){
      .main-nav{display:none}
      .hamburger{display:flex}
      .header-inner{min-height:70px}
      .header-btns{margin-left:auto}
      .ea-content-stack .product-intro{grid-template-columns:minmax(260px,.8fr) minmax(0,1.2fr);gap:28px;padding:32px}
      .ea-content-stack .detail-layout{grid-template-columns:minmax(0,1fr) 280px}
    }
    @media (max-width:860px){
      .ea-content-stack .product-intro{grid-template-columns:1fr}
      .ea-content-stack .product-cover{max-width:520px;margin:0 auto;width:100%}
      .ea-content-stack .detail-layout{grid-template-columns:1fr}
      .ea-content-stack .sidebar{position:static;grid-template-columns:1fr 1fr}
      .ea-content-stack .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
      .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
    }
    @media (max-width:680px){
      .container{width:min(100% - 28px,1200px)}
      .topbar-inner{min-height:42px}
      .topbar-inner>span{display:none}
      .topbar-links{width:100%;justify-content:space-between;gap:10px}
      .topbar-links a{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
      .logo span{display:none}
      .member-link{display:none}
      .account-btn{min-height:39px;padding:0 13px}
      .ea-content-stack{padding-bottom:55px}
      .ea-content-stack .product-crumb{padding:16px 0}
      .ea-content-stack .product-intro{padding:20px;border-radius:20px}
      .ea-content-stack h1{font-size:32px}
      .ea-content-stack .lead{font-size:15px}
      .ea-content-stack .product-actions{display:grid;grid-template-columns:1fr}
      .ea-content-stack .content-panel{padding:22px 18px}
      .ea-content-stack .content-heading{font-size:22px}
      .ea-content-stack .sidebar{grid-template-columns:1fr}
      .ea-content-stack .section-head{display:block}
      .ea-content-stack .section-head h2{font-size:26px}
      .ea-content-stack .section-head p{margin-top:4px}
      .ea-content-stack .related-grid{grid-template-columns:1fr}
      .footer .container{padding-top:42px}
      .footer-grid{grid-template-columns:1fr;gap:30px}
      .footer-bottom{align-items:flex-start;flex-direction:column;gap:6px}
    }