:root{
      --theme:#0B3D91;
      --ink:#10233d;
      --muted:#63758d;
      --line:#dce7f2;
      --pale:#f3f8fc;
      --white:#fff;
      --shadow:0 16px 45px rgba(15,55,100,.1);
      --radius:18px
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#f7fbfe;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","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% - 36px));margin:auto}
    .topbar{background:#071d3d;color:#dcecff;font-size:13px}
    .topbar .container{min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:18px}
    .topbar-links{display:flex;gap:22px}
    .topbar a{color:#dcecff}
    .header{position:relative;z-index:20;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);box-shadow:0 4px 18px rgba(21,63,100,.04)}
    .header-inner{height:78px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;min-width:190px;font-size:19px;font-weight:800;color:var(--theme)}
    .logo img{width:38px;height:38px;object-fit:contain}
    .main-nav{flex:1}
    .nav-list{display:flex;align-items:stretch;justify-content:center;gap:3px;list-style:none;padding:0;margin:0}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;height:78px;padding:0 15px;color:#273b55;font-size:15px;white-space:nowrap}
    .nav-link:hover,.nav-item:focus-within>.nav-link{color:var(--theme)}
    .has-arrow:after{content:"";width:6px;height:6px;margin:0 0 3px 8px;border-right:1.5px solid currentColor;border-bottom:1.5px solid currentColor;transform:rotate(45deg)}
    .dropdown-panel,.mega-menu{position:absolute;top:100%;left:50%;transform:translateX(-50%);opacity:0;visibility:hidden;pointer-events:none;transition:.2s ease;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:0 0 16px 16px}
    .dropdown-panel{width:250px;padding:12px}
    .dropdown-panel a{display:block;padding:9px 11px;border-radius:8px;font-size:14px}
    .dropdown-panel a:hover{background:var(--pale);color:var(--theme)}
    .mega-menu{width:min(850px,calc(100vw - 28px));padding:0}
    .mega-inner{padding:24px}
    .mega-title{font-size:16px;font-weight:800;color:var(--theme);margin-bottom:16px}
    .broker-grid,.video-grid,.tool-grid,.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
    .mega-card{display:flex;gap:10px;min-width:0;padding:12px;border:1px solid var(--line);border-radius:12px;background:#fff}
    .mega-card:hover{border-color:#8db2db;background:#f7fbff}
    .mega-card img{width:34px;height:34px;object-fit:contain;flex:none}
    .mega-card>span:last-child{min-width:0}
    .mega-card strong,.mega-card small{display:block;overflow:hidden;text-overflow:ellipsis}
    .mega-card strong{font-size:13px;white-space:nowrap}
    .mega-card small{font-size:11px;color:var(--muted);line-height:1.5}
    .video-play{width:34px;height:34px;display:grid;place-items:center;border-radius:50%;background:var(--theme);color:#fff;flex:none}
    .mega-footer{display:block;margin-top:18px;color:var(--theme);font-weight:700;font-size:13px}
    .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;pointer-events:auto}
    .nav-item>.dropdown-panel:before,.nav-item>.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-18px;height:18px}
    .header-btns{display:flex;align-items:center;gap:10px;white-space:nowrap}
    .member-link{font-size:13px;color:var(--theme)}
    .open-account{padding:9px 16px;border-radius:9px;background:var(--theme);color:#fff;font-size:13px;font-weight:700}
    .hamburger{display:none;border:0;background:none;padding:8px;cursor:pointer}
    .hamburger span{display:block;width:24px;height:2px;background:var(--ink);margin:5px 0;transition:.2s}
    .drawer-overlay{display:none;position:fixed;inset:0;background:rgba(2,16,35,.48);z-index:50}
    .drawer-overlay.open{display:block}
    .mobile-drawer{position:fixed;z-index:60;top:0;right:0;width:min(360px,88vw);height:100vh;overflow:auto;background:#fff;transform:translateX(105%);transition:.3s;box-shadow:-10px 0 35px rgba(0,0,0,.18)}
    .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;color:var(--theme)}
    .drawer-head span{flex:1}
    .drawer-head a{padding:6px 11px;border-radius:7px;background:var(--theme);color:#fff;font-size:13px}
    .drawer-close{border:0;background:none;font-size:28px;color:var(--muted);cursor:pointer}
    .drawer-menu{padding:10px 18px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;border-bottom:1px solid #edf2f7;background:none;text-align:left;color:var(--ink);font-weight:700;cursor:pointer}
    .drawer-toggle:after{content:"＋";float:right;color:var(--theme)}
    .drawer-toggle.active:after{content:"－"}
    .drawer-submenu{display:none;padding:4px 0 8px 16px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:8px 0;color:var(--muted);font-size:14px}
    .footer{margin-top:70px;background:#071d3d;color:#b9cce1}
    .footer .container{padding:52px 0 20px}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:34px}
    .footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:19px;font-weight:800;margin-bottom:14px}
    .footer-brand img{width:36px;height:36px;object-fit:contain}
    .footer p{margin:8px 0;font-size:13px;color:#9fb5cc}
    .footer h3{margin:0 0 14px;color:#fff;font-size:15px}
    .footer a{display:block;margin:7px 0;font-size:13px;color:#b9cce1}
    .footer a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:36px;padding-top:18px;border-top:1px solid rgba(255,255,255,.13);font-size:12px;color:#8fa8c1}
    .product-page{padding:42px 0 10px}
    .breadcrumb{display:flex;gap:8px;align-items:center;color:var(--muted);font-size:13px;margin-bottom:25px}
    .breadcrumb a{color:var(--theme)}
    .product-hero{display:grid;grid-template-columns:340px minmax(0,1fr);gap:38px;padding:34px;background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow)}
    .product-cover{min-height:290px;display:grid;place-items:center;border-radius:18px;background:linear-gradient(145deg,#eaf4ff,#f8fbff);padding:25px}
    .product-cover img{max-height:250px;object-fit:contain}
    .product-summary{min-width:0}
    .product-summary .eyebrow{display:inline-block;padding:5px 12px;border-radius:30px;color:var(--theme);background:#eaf3fc;font-size:12px;font-weight:700}
    .product-summary h1{margin:13px 0 12px;font-size:clamp(28px,4vw,45px);line-height:1.2;color:#092d62}
    .product-intro{margin:0 0 22px;color:var(--muted);font-size:16px}
    .product-meta{display:flex;flex-wrap:wrap;gap:10px 22px;padding:16px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);color:var(--muted);font-size:13px}
    .product-meta strong{color:var(--ink)}
    .product-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
    .primary-btn,.secondary-btn{display:inline-flex;align-items:center;justify-content:center;padding:11px 20px;border-radius:9px;font-weight:700;font-size:14px}
    .primary-btn{background:var(--theme);color:#fff}
    .secondary-btn{border:1px solid #b9cde3;color:var(--theme);background:#fff}
    .product-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:28px;margin-top:30px}
    .content-card,.related-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:28px;box-shadow:0 8px 28px rgba(15,55,100,.05)}
    .content-card h2,.related-card h2{margin:0 0 20px;color:#092d62;font-size:22px}
    .product-body{min-width:0;max-width:100%;overflow-x:auto;color:#41566e}
    .product-body img{max-width:100%;height:auto}
    .product-body table{max-width:100%;display:block;overflow-x:auto;border-collapse:collapse}
    .product-body p{margin:0 0 1em}
    .related-list{display:grid;gap:13px}
    .related-item{display:flex;gap:10px;padding-bottom:13px;border-bottom:1px solid #edf2f7}
    .related-item:last-child{border-bottom:0;padding-bottom:0}
    .related-item img{width:52px;height:52px;object-fit:contain;border-radius:9px;background:var(--pale);padding:5px;flex:none}
    .related-item strong{display:block;font-size:14px;color:var(--ink);line-height:1.45}
    .related-item small{display:block;color:var(--muted);font-size:12px;margin-top:3px}
    @media(max-width:1050px){
      .nav-link{padding:0 9px;font-size:14px}
      .logo{min-width:155px}
      .member-link{display:none}
    }
    @media(max-width:800px){
      .topbar .container{padding:8px 0;align-items:flex-start}
      .topbar-links{gap:8px;flex-direction:column;text-align:right}
      .header-inner{height:68px}
      .main-nav{display:none}
      .hamburger{display:block}
      .open-account{display:none}
      .footer-grid{grid-template-columns:1fr 1fr}
      .product-hero,.product-layout{grid-template-columns:1fr}
      .product-cover{min-height:220px}
    }
    @media(max-width:520px){
      .container{width:min(100% - 26px,1180px)}
      .topbar{font-size:11px}
      .footer-grid{grid-template-columns:1fr}
      .footer-bottom{display:block}
      .footer-bottom span{display:block;margin-top:6px}
      .product-page{padding-top:25px}
      .product-hero{padding:20px}
      .content-card,.related-card{padding:20px}
      .product-summary h1{font-size:30px}
    }