:root{
      --theme:#0B3D91;
      --ink:#142033;
      --muted:#687386;
      --line:#e5eaf1;
      --soft:#f5f8fc;
      --gold:#c99a3d;
      --white:#fff;
      --shadow:0 18px 48px rgba(19,39,72,.10);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#fff;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:#0e1728;color:#dce4f1;font-size:13px}
    .topbar .container{min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:16px}
    .topbar a{margin-left:20px;color:#dce4f1}
    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
    .header-inner{min-height:78px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;white-space:nowrap;font-weight:800;color:var(--theme);font-size:18px}
    .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;margin:0;padding:0}
    .nav-item{position:relative}
    .nav-link{display:block;padding:27px 14px;color:#29364a;font-size:14px;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--theme)}
    .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%;transform:translateX(-50%) translateY(8px);width:310px;padding:22px;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:680px}
    .nav-item:after{content:"";position:absolute;top:100%;left:0;right:0;height:12px}
    .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 13px;color:var(--theme);font-size:14px;font-weight:800}
    .dropdown-panel>a:not(.mega-footer),.mega-links a{display:block;padding:8px 0;border-bottom:1px solid #eef1f5;color:#4c5a6e;font-size:13px}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
    .mega-card{display:block;padding:11px;border:1px solid var(--line);border-radius:10px;background:#fbfcfe;min-width:0}
    .mega-card img{width:100%;height:52px;object-fit:contain;margin-bottom:7px}
    .mega-card strong{display:block;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .mega-card small{display:block;margin-top:4px;color:var(--muted);font-size:11px;line-height:1.45;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
    .mega-footer{display:inline-block;margin-top:16px;color:var(--theme);font-weight:700;font-size:13px}
    .header-btns{display:flex;align-items:center;gap:12px}
    .member-link{color:var(--theme);font-size:13px;font-weight:700}
    .open-account{padding:9px 16px;border-radius:8px;background:var(--theme);color:#fff;font-size:13px;font-weight:700}
    .hamburger{display:none;width:42px;height:40px;border:1px solid var(--line);border-radius:8px;background:#fff;padding:9px}
    .hamburger span{display:block;width:22px;height:2px;margin:4px auto;background:var(--ink);transition:.2s}
    .hamburger.active span:nth-child(1){transform:translateY(6px) rotate(45deg)}
    .hamburger.active span:nth-child(2){opacity:0}
    .hamburger.active span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
    .drawer-overlay{position:fixed;inset:0;background:rgba(4,12,26,.48);opacity:0;visibility:hidden;z-index:30;transition:.2s}
    .drawer-overlay.open{opacity:1;visibility:visible}
    .mobile-drawer{position:fixed;z-index:31;top:0;right:0;width:min(390px,88vw);height:100vh;overflow:auto;background:#fff;transform:translateX(100%);transition:.25s ease}
    .mobile-drawer.open{transform:translateX(0)}
    .drawer-head{display:flex;align-items:center;gap:16px;padding:22px;border-bottom:1px solid var(--line);font-weight:800;color:var(--theme)}
    .drawer-head a{margin-left:auto;font-size:13px}
    .drawer-close{border:0;background:transparent;font-size:28px;line-height:1;color:#536071;cursor:pointer}
    .drawer-menu{padding:12px 22px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 0;border:0;border-bottom:1px solid var(--line);background:#fff;text-align:left;color:var(--ink);font-weight:700;cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--theme);font-size:20px;font-weight:400}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{display:none;padding:4px 0 8px 14px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:13px}
    .footer{margin-top:80px;background:#0d1728;color:#b9c5d5}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:42px;padding:58px 0 42px}
    .footer h3,.footer h4{margin:0 0 15px;color:#fff}
    .footer h3{font-size:21px}
    .footer h4{font-size:15px}
    .footer p{margin:0;color:#aab7c8;font-size:13px}
    .footer-grid>div>a{display:block;margin:7px 0;color:#b9c5d5;font-size:13px}
    .social-links{display:flex;gap:14px;margin-top:18px}
    .social-links a{font-size:13px;color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;padding:18px 0;border-top:1px solid rgba(255,255,255,.12);font-size:12px;color:#8998ac}
    .ea-content-stack{padding:0 0 10px;background:linear-gradient(180deg,#f7faff 0,#fff 360px)}
    .product-crumb{padding:24px 0 12px;color:#78859a;font-size:13px}
    .product-crumb a{color:var(--theme)}
    .product-hero{padding:28px 0 46px}
    .product-intro{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(320px,.92fr);gap:56px;align-items:center}
    .product-image-panel{min-height:355px;padding:38px;border:1px solid var(--line);border-radius:24px;background:#fff;box-shadow:var(--shadow);display:flex;align-items:center;justify-content:center}
    .product-image-panel img{max-height:290px;width:auto;object-fit:contain}
    .product-kicker{display:inline-flex;padding:6px 12px;border-radius:999px;background:#eaf1ff;color:var(--theme);font-size:12px;font-weight:800}
    .product-title{margin:16px 0 12px;font-size:clamp(30px,4vw,52px);line-height:1.18;letter-spacing:-1px;color:#13233c}
    .product-summary{margin:0;color:#607087;font-size:17px;line-height:1.9}
    .product-meta{display:flex;flex-wrap:wrap;gap:10px 22px;margin:24px 0;color:#718096;font-size:13px}
    .product-meta strong{color:#27364d}
    .product-action{display:flex;gap:12px;flex-wrap:wrap}
    .primary-btn,.secondary-btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 22px;border-radius:8px;font-size:14px;font-weight:800}
    .primary-btn{background:var(--theme);color:#fff}
    .secondary-btn{border:1px solid #cfd8e5;background:#fff;color:var(--theme)}
    .product-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:34px;align-items:start}
    .product-content-card,.related-products{border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:0 10px 30px rgba(20,42,76,.05)}
    .product-content-card{padding:34px}
    .section-heading{display:flex;align-items:center;justify-content:space-between;gap:15px;padding-bottom:15px;border-bottom:1px solid var(--line)}
    .section-heading h2{margin:0;font-size:22px;color:#18283f}
    .section-heading span{font-size:12px;color:#8591a1}
    .product-body{min-width:0;max-width:100%;overflow-x:auto;padding-top:24px;color:#48576c;font-size:15px}
    .product-body img,.product-body table{max-width:100%}
    .product-body h2,.product-body h3{color:#1d304b}
    .product-body a{color:var(--theme);text-decoration:underline}
    .product-body table{border-collapse:collapse}
    .product-body td,.product-body th{padding:8px 12px;border:1px solid var(--line)}
    .related-products{padding:22px}
    .related-products h2{margin:0 0 16px;font-size:19px}
    .related-card{display:block;padding:14px 0;border-top:1px solid var(--line)}
    .related-card img{width:100%;height:115px;object-fit:contain;margin-bottom:10px}
    .related-card strong{display:block;font-size:14px;color:#23354d}
    .related-card p{margin:5px 0;color:#7a8798;font-size:12px;line-height:1.6}
    .related-card small{color:#9aa6b5;font-size:11px}
    @media(max-width:1040px){
      .main-nav{display:none}
      .hamburger{display:block}
      .header-btns{margin-left:auto}
      .product-intro{grid-template-columns:1fr;gap:30px}
      .product-image-panel{min-height:280px}
      .product-layout{grid-template-columns:1fr}
      .related-products{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}
      .related-products h2{grid-column:1/-1}
    }
    @media(max-width:700px){
      .container{width:min(100% - 28px,1180px)}
      .topbar .container{align-items:flex-start;flex-direction:column;padding:9px 0;gap:2px}
      .topbar a{margin:0 14px 0 0}
      .header-inner{min-height:68px}
      .member-link{display:none}
      .open-account{padding:8px 12px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
      .footer-grid>div:first-child{grid-column:1/-1}
      .footer-bottom{flex-direction:column}
      .product-crumb{padding-top:18px}
      .product-title{font-size:34px}
      .product-summary{font-size:15px}
      .product-image-panel{min-height:230px;padding:24px}
      .product-content-card{padding:22px 18px}
      .related-products{grid-template-columns:1fr}
      .related-products h2{grid-column:auto}
    }