:root{--theme:#0B3D91;--ink:#142033;--muted:#687386;--line:#e5e9f0;--soft:#f4f7fb;--gold:#c58b36}
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#f7f9fc;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}
    .container{width:min(1180px,calc(100% - 40px));margin:auto}
    .topbar{background:#101b2c;color:#c9d2e1;font-size:13px}
    .topbar .container{height:36px;display:flex;align-items:center;justify-content:space-between}
    .topbar a{color:#fff}
    .topbar-links{display:flex;gap:24px}
    .header{height:78px;background:#fff;border-bottom:1px solid var(--line);position:relative;z-index:20}
    .header-inner{height:100%;display:flex;align-items:center;gap:38px}
    .logo{display:flex;align-items:center;gap:10px;min-width:190px;font-weight:800;color:#10213d;font-size:19px}
    .logo img{width:34px;height:34px;object-fit:contain}
    .main-nav{flex:1}
    .nav-list{display:flex;align-items:stretch;justify-content:center;gap:4px;list-style:none;margin:0;padding:0;height:78px}
    .nav-item{position:relative;display:flex;align-items:center}
    .nav-link{padding:25px 14px;font-size:15px;color:#344158;white-space:nowrap}
    .nav-link:hover,.nav-link:focus{color:var(--theme)}
    .has-arrow:after{content:"⌄";font-size:12px;margin-left:6px;color:#9aa5b7}
    .dropdown-panel,.mega-menu{position:absolute;top:calc(100% - 1px);left:50%;transform:translateX(-50%);background:#fff;border:1px solid var(--line);border-radius:0 0 12px 12px;box-shadow:0 18px 38px #10213d1c;opacity:0;visibility:hidden;pointer-events:none;transition:.2s;z-index:30}
    .dropdown-panel{width:250px;padding:12px}
    .dropdown-panel a{display:block;padding:9px 12px;border-radius:7px;font-size:14px}
    .dropdown-panel a:hover{background:var(--soft);color:var(--theme)}
    .mega-menu{width:700px;padding:20px}
    .nav-item:hover>.mega-menu,.nav-item:focus-within>.mega-menu,.nav-item:hover>.dropdown-panel,.nav-item:focus-within>.dropdown-panel{opacity:1;visibility:visible;pointer-events:auto}
    .mega-menu:before,.dropdown-panel:before{content:"";position:absolute;left:0;right:0;top:-14px;height:14px}
    .mega-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
    .mega-card{display:flex;flex-direction:column;gap:3px;padding:12px;border:1px solid #edf0f5;border-radius:9px;background:#fbfcfe;min-height:70px}
    .mega-card:hover{border-color:#aac0e4;background:#f3f7fd}
    .mega-card img{width:32px;height:32px;object-fit:contain;margin-bottom:3px}
    .mega-card strong{font-size:13px;color:#23324b}
    .mega-card small{display:block;color:#7b8799;font-size:11px;line-height:1.5}
    .mega-footer{display:block;margin-top:15px;padding-top:12px;border-top:1px solid var(--line);font-size:13px;color:var(--theme);font-weight:700}
    .header-btns{display:flex;align-items:center;gap:10px}
    .member-link{font-size:13px;color:var(--theme);white-space:nowrap}
    .open-account{background:var(--theme);color:#fff;padding:8px 16px;border-radius:6px;font-size:13px;white-space:nowrap}
    .hamburger{display:none;border:0;background:transparent;padding:8px;cursor:pointer}
    .hamburger span{display:block;width:23px;height:2px;background:#17253b;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}
    .mobile-drawer{display:none}
    .footer{margin-top:70px;background:#101b2c;color:#b9c5d5;padding:46px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:35px}
    .footer h3{margin:0 0 14px;color:#fff;font-size:15px}
    .footer p{margin:5px 0;font-size:13px}
    .footer-grid>div:not(.footer-brand) a{display:block;font-size:13px;margin:5px 0;color:#b9c5d5}
    .footer-grid>div:not(.footer-brand) a:hover{color:#fff}
    .footer-brand strong{font-size:20px;color:#fff}
    .footer-bottom{border-top:1px solid #2b3b53;margin-top:35px;padding-top:17px;display:flex;justify-content:space-between;font-size:12px;color:#8998ad}
    .ea-content-stack{padding:46px 0 10px;min-height:600px}
    .product-breadcrumb{font-size:13px;color:#7b8799;margin-bottom:22px}
    .product-breadcrumb a{color:var(--theme)}
    .product-head{background:#fff;border:1px solid var(--line);border-radius:16px;padding:30px;display:grid;grid-template-columns:270px minmax(0,1fr);gap:34px;align-items:center;box-shadow:0 12px 30px #17396d08}
    .product-cover{height:210px;border-radius:12px;background:linear-gradient(145deg,#edf3fc,#fff);display:flex;align-items:center;justify-content:center;padding:24px;border:1px solid #e7edf6}
    .product-cover img{max-height:165px;width:auto;object-fit:contain}
    .product-kicker{font-size:13px;color:var(--theme);font-weight:700;letter-spacing:.08em}
    .product-head h1{font-size:clamp(28px,4vw,46px);line-height:1.2;margin:8px 0 12px;color:#13213a}
    .product-summary{font-size:16px;color:#687386;margin:0 0 18px}
    .product-meta{display:flex;flex-wrap:wrap;gap:10px 22px;color:#788497;font-size:13px}
    .product-meta b{color:#263751}
    .product-actions{margin-top:22px;display:flex;gap:12px;flex-wrap:wrap}
    .btn{display:inline-flex;align-items:center;justify-content:center;border-radius:7px;padding:10px 20px;font-size:14px;font-weight:700}
    .btn-primary{background:var(--theme);color:#fff}
    .btn-light{background:#edf3fb;color:var(--theme)}
    .product-layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:25px;margin-top:25px;align-items:start}
    .product-content,.related-products{background:#fff;border:1px solid var(--line);border-radius:14px}
    .product-content{padding:32px;min-width:0;max-width:100%;overflow:hidden}
    .section-title{font-size:21px;margin:0 0 20px;padding-bottom:13px;border-bottom:1px solid var(--line);color:#172a48}
    .product-body{min-width:0;max-width:100%;overflow-x:auto;color:#4f5e73}
    .product-body img{max-width:100%;height:auto}
    .product-body table{max-width:100%;width:100%;border-collapse:collapse}
    .product-body td,.product-body th{border:1px solid var(--line);padding:9px;text-align:left}
    .product-body h2,.product-body h3{color:#172a48}
    .related-products{padding:22px}
    .related-products h2{font-size:18px;margin:0 0 15px}
    .related-card{display:grid;grid-template-columns:65px 1fr;gap:11px;padding:13px 0;border-bottom:1px solid var(--line)}
    .related-card:last-child{border-bottom:0}
    .related-card img{width:65px;height:58px;object-fit:contain;border-radius:7px;background:#f4f7fb}
    .related-card strong{font-size:14px;line-height:1.4;display:block;color:#243654}
    .related-card p{margin:4px 0 0;color:#8994a4;font-size:12px;line-height:1.5}
    .product-notice{margin-top:20px;padding:15px 17px;background:#fff8ea;color:#81622e;border-left:3px solid var(--gold);font-size:13px;border-radius:5px}
    @media(max-width:1050px){
      .header-inner{gap:15px}.nav-link{padding-left:9px;padding-right:9px}.logo{min-width:150px}
    }
    @media(max-width:800px){
      .container{width:min(100% - 28px,620px)}
      .topbar .container{height:auto;min-height:36px;padding:7px 0;display:block}
      .topbar-links{gap:13px;margin-top:2px;flex-wrap:wrap}
      .header{height:66px}.header-inner{justify-content:space-between}
      .main-nav{display:none}.header-btns{margin-left:auto}.member-link{display:none}.hamburger{display:block}
      .mobile-drawer{display:block;position:fixed;z-index:60;top:0;right:0;height:100vh;width:min(350px,88vw);background:#fff;transform:translateX(105%);transition:.25s;box-shadow:-10px 0 30px #07172d29;overflow:auto}
      .mobile-drawer.open{transform:translateX(0)}
      .drawer-overlay{display:block;position:fixed;inset:0;background:#07172d88;z-index:50;opacity:0;visibility:hidden;transition:.2s}
      .drawer-overlay.open{opacity:1;visibility:visible}
      .drawer-head{height:68px;background:var(--theme);color:#fff;display:flex;align-items:center;gap:15px;padding:0 20px;font-weight:700}
      .drawer-head a{margin-left:auto;color:#fff;border:1px solid #ffffff66;border-radius:5px;padding:4px 9px;font-size:13px}
      .drawer-close{color:#fff;background:transparent;border:0;font-size:28px;line-height:1;cursor:pointer}
      .drawer-menu{padding:12px 20px 35px}.drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 0;border:0;border-bottom:1px solid var(--line);background:transparent;text-align:left;color:#263751;font-size:15px;font-family:inherit}
      .drawer-toggle:after{content:"＋";float:right;color:#9aa5b7}.drawer-toggle.active:after{content:"－"}
      .drawer-submenu{max-height:0;overflow:hidden;transition:.25s;padding-left:14px}.drawer-submenu.open{max-height:700px}
      .drawer-submenu a{display:block;padding:9px 0;color:#728097;font-size:13px}
      .drawer-group{border-bottom:1px solid var(--line)}
      .product-head{grid-template-columns:1fr;padding:22px;gap:20px}.product-cover{height:180px}
      .product-layout{grid-template-columns:1fr}.product-content{padding:22px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:25px}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:5px}
    }
    @media(max-width:480px){
      .open-account{padding:7px 11px}.product-head h1{font-size:30px}.product-meta{display:block}.product-meta span{display:block;margin:5px 0}.footer-grid{grid-template-columns:1fr}
    }