:root{
      --theme:#0B3D91;
      --theme-dark:#062967;
      --theme-soft:#eaf1fc;
      --accent:#e6a23c;
      --ink:#152238;
      --muted:#667085;
      --line:#dce4ef;
      --surface:#ffffff;
      --background:#f5f7fb;
      --success:#15805f;
      --shadow:0 16px 44px rgba(11,61,145,.11);
      --radius:18px;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--ink);
      background:var(--background);
      font-family:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",Arial,sans-serif;
      line-height:1.7;
      -webkit-font-smoothing:antialiased;
    }
    body,
    button,
    input{font:inherit}
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    button{color:inherit}
    .container{
      width:min(1180px,calc(100% - 40px));
      margin:0 auto;
    }

    .topbar{
      color:#dce8ff;
      background:var(--theme-dark);
      font-size:13px;
    }
    .topbar .container{
      min-height:38px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
    }
    .topbar-links{
      display:flex;
      align-items:center;
      gap:22px;
    }
    .topbar a{transition:color .2s ease}
    .topbar a:hover{color:#fff}

    .header{
      position:relative;
      z-index:50;
      background:rgba(255,255,255,.98);
      border-bottom:1px solid var(--line);
      box-shadow:0 5px 22px rgba(27,48,84,.05);
    }
    .header-inner{
      min-height:78px;
      display:flex;
      align-items:center;
      gap:28px;
    }
    .logo{
      flex:0 0 auto;
      display:flex;
      align-items:center;
      gap:11px;
      min-width:170px;
      color:var(--theme);
      font-size:20px;
      font-weight:800;
      letter-spacing:.01em;
    }
    .logo img{
      width:42px;
      height:42px;
      object-fit:contain;
      border-radius:10px;
    }
    .main-nav{
      min-width:0;
      flex:1;
      align-self:stretch;
    }
    .nav-list{
      height:100%;
      display:flex;
      align-items:stretch;
      justify-content:center;
      gap:2px;
      margin:0;
      padding:0;
      list-style:none;
    }
    .nav-item{
      position:relative;
      display:flex;
      align-items:stretch;
    }
    .nav-link{
      display:flex;
      align-items:center;
      gap:6px;
      padding:0 13px;
      color:#26354d;
      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(--theme);
      background:var(--theme-soft);
    }
    .has-arrow::after{
      content:"";
      width:6px;
      height:6px;
      margin-top:-4px;
      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{
      margin-top:3px;
      transform:rotate(225deg);
    }
    .dropdown-panel,
    .mega-menu{
      position:absolute;
      top:100%;
      left:50%;
      visibility:hidden;
      opacity:0;
      transform:translate(-50%,10px);
      pointer-events:none;
      background:#fff;
      border:1px solid var(--line);
      border-radius:0 0 16px 16px;
      box-shadow:0 24px 50px rgba(15,35,70,.16);
      transition:opacity .2s ease,transform .2s ease,visibility .2s ease;
    }
    .dropdown-panel::before,
    .mega-menu::before{
      content:"";
      position:absolute;
      right:0;
      bottom:100%;
      left:0;
      height:8px;
    }
    .nav-item:hover>.dropdown-panel,
    .nav-item:hover>.mega-menu,
    .nav-item:focus-within>.dropdown-panel,
    .nav-item:focus-within>.mega-menu{
      visibility:visible;
      opacity:1;
      transform:translate(-50%,0);
      pointer-events:auto;
    }
    .dropdown-panel{
      width:320px;
      padding:20px;
    }
    .mega-menu{
      width:min(760px,calc(100vw - 44px));
      padding:22px;
    }
    .panel-title{
      margin:0 0 12px;
      color:var(--theme);
      font-size:13px;
      font-weight:800;
      letter-spacing:.08em;
    }
    .panel-list{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:8px;
    }
    .dropdown-panel .panel-list{grid-template-columns:1fr}
    .panel-list a{
      min-width:0;
      padding:9px 11px;
      overflow:hidden;
      color:#34435b;
      background:#f7f9fc;
      border-radius:9px;
      text-overflow:ellipsis;
      white-space:nowrap;
      transition:color .2s ease,background .2s ease;
    }
    .panel-list a:hover{
      color:var(--theme);
      background:var(--theme-soft);
    }
    .mega-grid{
      display:grid;
      grid-template-columns:repeat(3,minmax(0,1fr));
      gap:10px;
    }
    .mega-card{
      min-width:0;
      min-height:78px;
      display:flex;
      align-items:center;
      gap:11px;
      padding:11px;
      background:#f7f9fc;
      border:1px solid transparent;
      border-radius:12px;
      transition:transform .2s ease,border-color .2s ease,background .2s ease;
    }
    .mega-card:hover{
      transform:translateY(-2px);
      background:#fff;
      border-color:#bfd0ec;
    }
    .mega-card img{
      flex:0 0 auto;
      width:42px;
      height:42px;
      object-fit:contain;
      background:#fff;
      border-radius:9px;
    }
    .mega-card span{
      min-width:0;
      display:block;
    }
    .mega-card strong,
    .mega-card small{
      display:block;
      overflow:hidden;
      text-overflow:ellipsis;
      white-space:nowrap;
    }
    .mega-card strong{
      margin-bottom:3px;
      color:#243249;
      font-size:14px;
    }
    .mega-card small{
      color:var(--muted);
      font-size:11px;
    }
    .mega-footer{
      display:block;
      margin-top:16px;
      padding:10px 14px;
      color:#fff;
      background:var(--theme);
      border-radius:10px;
      text-align:center;
      font-size:14px;
      font-weight:750;
    }
    .mega-footer:hover{background:var(--theme-dark)}
    .header-btns{
      flex:0 0 auto;
      display:flex;
      align-items:center;
      gap:9px;
    }
    .member-link,
    .open-link{
      padding:9px 14px;
      border-radius:9px;
      font-size:14px;
      font-weight:750;
      white-space:nowrap;
    }
    .member-link{
      color:var(--theme);
      border:1px solid #b9cceb;
      background:#fff;
    }
    .open-link{
      color:#fff;
      border:1px solid var(--theme);
      background:var(--theme);
    }
    .member-link:hover{background:var(--theme-soft)}
    .open-link:hover{background:var(--theme-dark)}
    .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:9px;
      cursor:pointer;
    }
    .hamburger span{
      width:20px;
      height:2px;
      background:var(--theme);
      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;
      z-index:98;
      inset:0;
      visibility:hidden;
      opacity:0;
      background:rgba(9,23,46,.58);
      backdrop-filter:blur(2px);
      transition:opacity .25s ease,visibility .25s ease;
    }
    .drawer-overlay.open{
      visibility:visible;
      opacity:1;
    }
    .mobile-drawer{
      position:fixed;
      z-index:99;
      top:0;
      right:0;
      width:min(390px,92vw);
      height:100vh;
      overflow-y:auto;
      background:#fff;
      box-shadow:-22px 0 54px rgba(8,25,54,.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:10px;
      padding:14px 18px;
      color:#fff;
      background:var(--theme);
    }
    .drawer-head span{
      min-width:0;
      flex:1;
      font-weight:750;
    }
    .drawer-head>a{
      padding:7px 13px;
      border:1px solid rgba(255,255,255,.45);
      border-radius:8px;
      font-weight:700;
    }
    .drawer-close{
      width:36px;
      height:36px;
      padding:0;
      color:#fff;
      background:transparent;
      border:0;
      font-size:30px;
      line-height:1;
      cursor:pointer;
    }
    .drawer-menu{padding:14px 18px 34px}
    .drawer-link,
    .drawer-toggle{
      width:100%;
      display:flex;
      align-items:center;
      justify-content:space-between;
      padding:13px 10px;
      color:#273750;
      background:transparent;
      border:0;
      border-bottom:1px solid #e7ecf3;
      text-align:left;
      font-weight:750;
      cursor:pointer;
    }
    .drawer-toggle::after{
      content:"+";
      color:var(--theme);
      font-size:20px;
      font-weight:400;
    }
    .drawer-toggle.active::after{content:"−"}
    .drawer-submenu{
      display:none;
      padding:7px 0 9px 14px;
      background:#f7f9fc;
      border-radius:0 0 10px 10px;
    }
    .drawer-submenu.open{display:block}
    .drawer-submenu a{
      display:block;
      padding:9px 10px;
      color:#5b687c;
      font-size:14px;
      border-left:2px solid #cbd8ec;
    }
    .drawer-submenu a:hover{
      color:var(--theme);
      border-left-color:var(--theme);
    }

    .ea-content-stack{
      min-width:0;
      padding-bottom:76px;
    }
    .ea-content-stack .product-masthead{
      position:relative;
      overflow:hidden;
      padding:50px 0 44px;
      color:#fff;
      background:
        radial-gradient(circle at 88% 20%,rgba(255,255,255,.14),transparent 26%),
        linear-gradient(135deg,var(--theme-dark),var(--theme) 58%,#416eb4);
    }
    .ea-content-stack .product-masthead::after{
      content:"";
      position:absolute;
      right:-80px;
      bottom:-150px;
      width:360px;
      height:360px;
      border:70px solid rgba(255,255,255,.06);
      border-radius:50%;
    }
    .ea-content-stack .breadcrumb{
      position:relative;
      z-index:1;
      display:flex;
      flex-wrap:wrap;
      align-items:center;
      gap:8px;
      margin-bottom:24px;
      color:#dce8ff;
      font-size:14px;
    }
    .ea-content-stack .breadcrumb a:hover{color:#fff}
    .ea-content-stack .product-heading{
      position:relative;
      z-index:1;
      max-width:900px;
      margin:0 auto;
      text-align:center;
    }
    .ea-content-stack .category-pill{
      display:inline-flex;
      align-items:center;
      padding:6px 14px;
      color:#fff;
      background:rgba(255,255,255,.12);
      border:1px solid rgba(255,255,255,.28);
      border-radius:999px;
      font-size:13px;
      font-weight:750;
    }
    .ea-content-stack .product-heading h1{
      margin:14px 0 12px;
      font-size:clamp(32px,5vw,54px);
      line-height:1.18;
      letter-spacing:-.03em;
    }
    .ea-content-stack .product-heading>p{
      max-width:760px;
      margin:0 auto;
      color:#e8effc;
      font-size:17px;
    }
    .ea-content-stack .product-meta{
      display:flex;
      flex-wrap:wrap;
      justify-content:center;
      gap:10px 20px;
      margin-top:22px;
      color:#d9e7ff;
      font-size:13px;
    }
    .ea-content-stack .product-meta span{
      display:inline-flex;
      align-items:center;
      gap:7px;
    }
    .ea-content-stack .product-meta span::before{
      content:"";
      width:6px;
      height:6px;
      background:#9dbcf1;
      border-radius:50%;
    }

    .ea-content-stack .product-overview{
      position:relative;
      z-index:2;
      display:grid;
      grid-template-columns:minmax(300px,.9fr) minmax(0,1.1fr);
      gap:34px;
      margin-top:-1px;
      padding:42px;
      background:#fff;
      border:1px solid var(--line);
      border-radius:0 0 22px 22px;
      box-shadow:var(--shadow);
    }
    .ea-content-stack .product-image-panel{
      min-width:0;
      display:flex;
      align-items:center;
      justify-content:center;
      min-height:350px;
      padding:28px;
      background:linear-gradient(145deg,#edf3fc,#f9fbff);
      border:1px solid #dae5f5;
      border-radius:18px;
    }
    .ea-content-stack .product-image-panel img{
      width:100%;
      max-height:390px;
      object-fit:contain;
      border-radius:12px;
    }
    .ea-content-stack .summary-panel{
      min-width:0;
      align-self:center;
    }
    .ea-content-stack .eyebrow{
      margin:0 0 8px;
      color:var(--theme);
      font-size:13px;
      font-weight:850;
      letter-spacing:.12em;
    }
    .ea-content-stack .summary-panel h2{
      margin:0 0 15px;
      font-size:30px;
      line-height:1.3;
    }
    .ea-content-stack .product-summary{
      margin:0;
      color:#526176;
      font-size:16px;
    }
    .ea-content-stack .summary-points{
      display:grid;
      grid-template-columns:repeat(2,minmax(0,1fr));
      gap:12px;
      margin:25px 0;
    }
    .ea-content-stack .summary-point{
      padding:14px;
      color:#34445c;
      background:#f7f9fc;
      border:1px solid #e1e8f2;
      border-radius:12px;
    }
    .ea-content-stack .summary-point strong{
      display:block;
      margin-bottom:2px;
      color:var(--theme);
      font-size:14px;
    }
    .ea-content-stack .summary-point span{
      color:var(--muted);
      font-size:13px;
    }
    .ea-content-stack .product-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
    }
    .ea-content-stack .primary-action,
    .ea-content-stack .secondary-action{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      min-height:46px;
      padding:10px 20px;
      border-radius:10px;
      font-size:14px;
      font-weight:800;
      transition:transform .2s ease,background .2s ease;
    }
    .ea-content-stack .primary-action{
      color:#fff;
      background:var(--theme);
    }
    .ea-content-stack .secondary-action{
      color:var(--theme);
      background:var(--theme-soft);
      border:1px solid #c7d7ef;
    }
    .ea-content-stack .primary-action:hover,
    .ea-content-stack .secondary-action:hover{transform:translateY(-2px)}
    .ea-content-stack .primary-action:hover{background:var(--theme-dark)}

    .ea-content-stack .content-layout{
      min-width:0;
      display:grid;
      grid-template-columns:minmax(0,1fr) 300px;
      gap:28px;
      margin-top:32px;
      align-items:start;
    }
    .ea-content-stack .product-article,
    .ea-content-stack .product-sidebar-card{
      min-width:0;
      background:#fff;
      border:1px solid var(--line);
      border-radius:var(--radius);
      box-shadow:0 10px 32px rgba(21,44,80,.06);
    }
    .ea-content-stack .product-article{padding:34px}
    .ea-content-stack .section-title{
      margin:0 0 22px;
      padding-bottom:14px;
      color:#1e2d45;
      border-bottom:1px solid var(--line);
      font-size:25px;
      line-height:1.35;
    }
    .ea-content-stack .section-title::after{
      content:"";
      display:block;
      width:56px;
      height:3px;
      margin-top:14px;
      background:var(--theme);
      border-radius:3px;
    }
    .ea-content-stack .product-body{
      min-width:0;
      max-width:100%;
      overflow-x:auto;
      color:#3c4b61;
      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 h2,
    .ea-content-stack .product-body h3{
      color:#1e2e47;
      line-height:1.4;
    }
    .ea-content-stack .product-body a{
      color:var(--theme);
      text-decoration:underline;
    }
    .ea-content-stack .product-sidebar{
      position:sticky;
      top:24px;
      display:grid;
      gap:18px;
    }
    .ea-content-stack .product-sidebar-card{padding:22px}
    .ea-content-stack .product-sidebar-card h2{
      margin:0 0 16px;
      font-size:18px;
    }
    .ea-content-stack .detail-list{
      display:grid;
      gap:0;
      margin:0;
    }
    .ea-content-stack .detail-list div{
      display:flex;
      justify-content:space-between;
      gap:15px;
      padding:11px 0;
      border-bottom:1px solid #e8edf4;
    }
    .ea-content-stack .detail-list div:last-child{border-bottom:0}
    .ea-content-stack .detail-list dt{
      color:var(--muted);
      font-size:13px;
    }
    .ea-content-stack .detail-list dd{
      margin:0;
      color:#293951;
      font-size:13px;
      font-weight:750;
      text-align:right;
      overflow-wrap:anywhere;
    }
    .ea-content-stack .notice-card{
      color:#39495f;
      background:#fffaf0;
      border-color:#f0ddb6;
    }
    .ea-content-stack .notice-card p{
      margin:0;
      color:#6d5b3c;
      font-size:13px;
    }

    .ea-content-stack .related-section{margin-top:52px}
    .ea-content-stack .related-head{
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:20px;
      margin-bottom:20px;
    }
    .ea-content-stack .related-head h2{
      margin:0;
      font-size:28px;
    }
    .ea-content-stack .related-head p{
      margin:0;
      color:var(--muted);
      font-size:14px;
    }
    .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:16px;
      box-shadow:0 9px 26px rgba(21,44,80,.06);
      transition:transform .2s ease,box-shadow .2s ease;
    }
    .ea-content-stack .related-card:hover{
      transform:translateY(-5px);
      box-shadow:0 16px 34px rgba(21,44,80,.12);
    }
    .ea-content-stack .related-image{
      height:180px;
      display:flex;
      align-items:center;
      justify-content:center;
      padding:18px;
      background:#eef3fa;
    }
    .ea-content-stack .related-image img{
      width:100%;
      height:100%;
      object-fit:contain;
      border-radius:8px;
    }
    .ea-content-stack .related-body{padding:18px}
    .ea-content-stack .related-body h3{
      margin:0 0 9px;
      overflow:hidden;
      color:#21314a;
      font-size:18px;
      line-height:1.45;
      display:-webkit-box;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }
    .ea-content-stack .related-body p{
      min-height:48px;
      margin:0 0 14px;
      overflow:hidden;
      color:var(--muted);
      font-size:13px;
      line-height:1.65;
      display:-webkit-box;
      -webkit-box-orient:vertical;
      -webkit-line-clamp:2;
    }
    .ea-content-stack .related-meta{
      display:flex;
      flex-wrap:wrap;
      justify-content:space-between;
      gap:8px;
      padding-top:12px;
      color:#7b8797;
      border-top:1px solid #e8edf4;
      font-size:12px;
    }

    .footer{
      color:#c8d4e8;
      background:#071c3f;
    }
    .footer .container{padding-top:54px}
    .footer-grid{
      display:grid;
      grid-template-columns:1.5fr 1fr 1fr 1.1fr;
      gap:38px;
      padding-bottom:42px;
    }
    .footer-brand{
      margin-bottom:14px;
      color:#fff;
      font-size:24px;
      font-weight:850;
    }
    .footer p{
      max-width:400px;
      margin:9px 0;
      color:#aebbd0;
      font-size:14px;
    }
    .footer h3{
      margin:2px 0 15px;
      color:#fff;
      font-size:16px;
    }
    .footer-links{
      display:grid;
      gap:9px;
    }
    .footer-links a,
    .footer-links span{
      color:#b8c6da;
      font-size:14px;
      overflow-wrap:anywhere;
    }
    .footer-links a:hover{color:#fff}
    .footer-bottom{
      min-height:66px;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:20px;
      color:#93a5bf;
      border-top:1px solid rgba(255,255,255,.11);
      font-size:13px;
    }

    @media (max-width:1100px){
      .main-nav{display:none}
      .hamburger{display:flex}
      .header-inner{min-height:70px}
      .logo{margin-right:auto}
      .ea-content-stack .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
    }

    @media (max-width:850px){
      .ea-content-stack .product-overview{
        grid-template-columns:1fr;
        padding:26px;
      }
      .ea-content-stack .product-image-panel{min-height:280px}
      .ea-content-stack .content-layout{grid-template-columns:1fr}
      .ea-content-stack .product-sidebar{
        position:static;
        grid-template-columns:repeat(2,minmax(0,1fr));
      }
      .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
    }

    @media (max-width:640px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{
        min-height:48px;
        align-items:flex-start;
        flex-direction:column;
        justify-content:center;
        gap:1px;
        padding:7px 0;
      }
      .topbar-links{
        width:100%;
        justify-content:space-between;
        gap:12px;
      }
      .topbar-links a{
        max-width:50%;
        overflow:hidden;
        text-overflow:ellipsis;
        white-space:nowrap;
      }
      .logo{min-width:0;font-size:17px}
      .logo img{width:36px;height:36px}
      .member-link{display:none}
      .open-link{padding:8px 12px}
      .header-inner{gap:10px}
      .ea-content-stack .product-masthead{padding:34px 0 30px}
      .ea-content-stack .product-heading{text-align:left}
      .ea-content-stack .product-heading>p{font-size:15px}
      .ea-content-stack .product-meta{justify-content:flex-start}
      .ea-content-stack .product-overview{
        margin-top:0;
        padding:18px;
        border-radius:0 0 16px 16px;
      }
      .ea-content-stack .product-image-panel{
        min-height:220px;
        padding:18px;
      }
      .ea-content-stack .summary-panel h2{font-size:24px}
      .ea-content-stack .summary-points{grid-template-columns:1fr}
      .ea-content-stack .product-actions{
        display:grid;
        grid-template-columns:1fr;
      }
      .ea-content-stack .product-article{padding:22px 18px}
      .ea-content-stack .product-sidebar{grid-template-columns:1fr}
      .ea-content-stack .related-head{
        align-items:flex-start;
        flex-direction:column;
        gap:5px;
      }
      .ea-content-stack .related-grid{grid-template-columns:1fr}
      .ea-content-stack .related-image{height:210px}
      .footer-grid{grid-template-columns:1fr;gap:28px}
      .footer-bottom{
        align-items:flex-start;
        flex-direction:column;
        justify-content:center;
        padding:18px 0;
      }
    }