:root{
      --theme:#0B3D91;
      --theme-dark:#082c68;
      --ink:#10233f;
      --muted:#6b7c93;
      --line:#dce7f1;
      --ice:#f3f8fc;
      --white:#fff;
      --shadow:0 16px 42px rgba(13,53,94,.11);
      --radius:16px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:#f7fafc;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","微软雅黑",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:#071d3d;color:#cbd9eb;font-size:13px}
    .topbar .container{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar-links{display:flex;gap:22px}
    .topbar a{color:#d9e7f7;transition:color .2s}
    .topbar a:hover{color:#fff}

    .header{position:relative;z-index:20;background:#fff;border-bottom:1px solid var(--line)}
    .header-inner{height:78px;display:flex;align-items:center;gap:28px}
    .logo{display:flex;align-items:center;gap:10px;min-width:190px;color:var(--theme);font-size:19px;font-weight:800;white-space:nowrap}
    .logo img{width:38px;height:38px;object-fit:contain}
    .main-nav{flex:1}
    .nav-list{display:flex;align-items:center;justify-content:center;gap:4px;list-style:none;margin:0;padding:0}
    .nav-item{position:relative}
    .nav-link{display:flex;align-items:center;gap:5px;padding:28px 13px;color:#233a57;font-size:14px;white-space:nowrap}
    .nav-link:hover{color:var(--theme)}
    .has-arrow:after{content:"";width:6px;height:6px;border-right:1px solid currentColor;border-bottom:1px solid currentColor;transform:rotate(45deg) translateY(-2px)}
    .dropdown-panel,.mega-menu{position:absolute;top:100%;left:50%;transform:translateX(-50%);opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s,transform .2s;z-index:30}
    .dropdown-panel{width:250px;padding:12px;background:#fff;border:1px solid var(--line);border-radius:0 0 12px 12px;box-shadow:var(--shadow)}
    .dropdown-panel a{display:block;padding:10px 13px;color:#344b67;font-size:13px;border-radius:8px}
    .dropdown-panel a:hover{background:var(--ice);color:var(--theme)}
    .mega-menu{width:min(760px,calc(100vw - 30px));padding-top:10px}
    .mega-menu:before{content:"";position:absolute;top:0;left:0;right:0;height:12px}
    .mega-inner{position:relative;background:#fff;border:1px solid var(--line);border-radius:0 0 18px 18px;padding:24px;box-shadow:var(--shadow)}
    .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;transform:translateX(-50%)}
    .mega-title{margin-bottom:14px;color:var(--theme);font-size:15px;font-weight:800}
    .broker-grid,.video-grid,.tool-grid,.product-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
    .mega-card{display:flex;align-items:flex-start;gap:10px;padding:11px;border:1px solid #e5edf4;border-radius:11px;background:#fbfdff;transition:border-color .2s,transform .2s}
    .mega-card:hover{border-color:#9dbcdc;transform:translateY(-2px)}
    .mega-card>img{width:34px;height:34px;object-fit:contain;flex:0 0 34px}
    .mega-card>span:last-child,.mega-card>span:not(.video-play){display:flex;flex-direction:column;min-width:0}
    .mega-card strong{color:#1e3756;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
    .mega-card small{display:block;color:var(--muted);font-size:11px;line-height:1.5;margin-top:2px}
    .video-play{display:grid;place-items:center;width:34px;height:34px;flex:0 0 34px;border-radius:50%;background:var(--theme);color:#fff;font-size:12px}
    .mega-footer{display:block;margin-top:18px;color:var(--theme);font-size:13px;font-weight:700}
    .mega-footer:hover{text-decoration:underline}
    .header-btns{display:flex;align-items:center;gap:9px;white-space:nowrap}
    .member-link{color:var(--theme);font-size:13px;font-weight:700}
    .open-account{padding:9px 15px;border-radius:8px;background:var(--theme);color:#fff;font-size:13px;font-weight:700}
    .open-account:hover{background:var(--theme-dark)}
    .hamburger{display:none;width:40px;height:40px;padding:8px;border:1px solid var(--line);border-radius:8px;background:#fff;cursor:pointer}
    .hamburger span{display:block;height:2px;margin:5px 0;background:var(--theme);transition:transform .2s,opacity .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;position:fixed;inset:0;background:rgba(4,20,43,.52);z-index:40}
    .drawer-overlay.open{display:block}
    .mobile-drawer{position:fixed;top:0;right:-360px;width:min(360px,88vw);height:100vh;overflow:auto;background:#fff;z-index:50;transition:right .25s;box-shadow:-12px 0 32px rgba(0,0,0,.16)}
    .mobile-drawer.open{right:0}
    .drawer-head{display:flex;align-items:center;gap:12px;padding:20px;border-bottom:1px solid var(--line);color:var(--theme);font-weight:800}
    .drawer-head>a{margin-left:auto;padding:7px 12px;border-radius:7px;background:var(--theme);color:#fff;font-size:13px}
    .drawer-close{border:0;background:none;color:#5a6c82;font-size:29px;line-height:1;cursor:pointer}
    .drawer-menu{padding:12px 20px 30px}
    .drawer-link,.drawer-toggle{display:block;width:100%;padding:14px 0;border:0;border-bottom:1px solid #edf2f6;background:none;color:#233a57;text-align:left;font-size:15px;cursor:pointer}
    .drawer-toggle:after{content:"+";float:right;color:var(--theme);font-size:20px;line-height:1}
    .drawer-toggle.active:after{content:"−"}
    .drawer-submenu{display:none;padding:5px 0 8px 15px}
    .drawer-submenu.open{display:block}
    .drawer-submenu a{display:block;padding:9px 0;color:var(--muted);font-size:13px}

    .article-page{padding:54px 0 76px}
    .article-wrap{width:min(900px,100%);margin:0 auto}
    .article-breadcrumb{display:flex;align-items:center;gap:8px;margin-bottom:20px;color:var(--muted);font-size:13px}
    .article-breadcrumb a{color:var(--theme)}
    .article-header{padding:34px 42px 30px;background:#fff;border:1px solid var(--line);border-radius:20px 20px 0 0;box-shadow:0 10px 28px rgba(22,59,96,.05)}
    .article-label{display:inline-flex;padding:5px 12px;border-radius:30px;background:#eaf3fb;color:var(--theme);font-size:12px;font-weight:800}
    .article-title{margin:17px 0 15px;color:#112b4d;font-size:clamp(28px,4vw,42px);line-height:1.25;letter-spacing:-.02em}
    .article-summary{margin:0 0 22px;color:#60738c;font-size:16px}
    .article-meta{display:flex;flex-wrap:wrap;gap:12px 22px;padding-top:18px;border-top:1px solid #edf2f6;color:#718198;font-size:13px}
    .article-meta strong{color:#314b69;font-weight:600}
    .article-cover{background:#fff;border:1px solid var(--line);border-top:0}
    .article-cover img{width:100%;max-height:470px;object-fit:cover}
    .article-content-card{padding:38px 42px;background:#fff;border:1px solid var(--line);border-top:0;border-radius:0 0 20px 20px;box-shadow:0 12px 30px rgba(22,59,96,.06)}
    .article-content{min-width:0;max-width:100%;overflow-x:auto;color:#304863;font-size:16px}
    .article-content p{margin:0 0 1.35em}
    .article-content h2,.article-content h3{margin:1.7em 0 .65em;color:#142f51;line-height:1.4}
    .article-content h2{padding-left:14px;border-left:4px solid var(--theme);font-size:25px}
    .article-content h3{font-size:20px}
    .article-content blockquote{margin:1.5em 0;padding:18px 22px;border-left:4px solid #7aa6d5;background:#f1f7fc;color:#50677f}
    .article-content table{width:100%;min-width:560px;border-collapse:collapse;margin:20px 0}
    .article-content th,.article-content td{padding:12px;border:1px solid #dce7f1;text-align:left}
    .article-content th{background:#edf5fb;color:var(--theme)}
    .article-content img{height:auto;margin:18px auto;border-radius:10px}
    .article-tags{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:30px;padding-top:22px;border-top:1px solid #e7eef5;color:var(--muted);font-size:13px}
    .article-tags a{padding:5px 11px;border:1px solid #cfe0ee;border-radius:20px;color:var(--theme);background:#f8fbfe}
    .article-tags a:hover{background:#eaf3fb}
    .article-nav{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:24px}
    .article-nav a{display:block;padding:17px 20px;border:1px solid var(--line);border-radius:12px;background:#fff;color:#304863}
    .article-nav a:hover{border-color:#9bb9d7;color:var(--theme)}
    .article-nav small{display:block;margin-bottom:5px;color:var(--muted);font-size:12px}
    .article-nav .next{text-align:right}
    .related-articles{margin-top:48px}
    .section-heading{display:flex;align-items:end;justify-content:space-between;gap:15px;margin-bottom:18px}
    .section-heading h2{margin:0;color:#142f51;font-size:25px}
    .section-heading a{color:var(--theme);font-size:13px}
    .related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
    .related-card{overflow:hidden;border:1px solid var(--line);border-radius:14px;background:#fff;transition:transform .2s,box-shadow .2s}
    .related-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
    .related-card img{width:100%;height:145px;object-fit:cover;background:#eaf2f8}
    .related-body{padding:15px}
    .related-body h3{margin:0 0 8px;color:#203b5b;font-size:15px;line-height:1.45}
    .related-body p{display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;overflow:hidden;margin:0 0 10px;color:var(--muted);font-size:13px}
    .related-meta{color:#8795a6;font-size:12px}

    .footer{padding:48px 0 20px;background:#081d3b;color:#b9c9dc}
    .footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:34px}
    .footer-brand{display:flex;align-items:center;gap:9px;margin-bottom:15px;color:#fff;font-size:18px;font-weight:800}
    .footer-brand img{width:35px;height:35px;object-fit:contain}
    .footer p{margin:0 0 10px;font-size:13px;line-height:1.8}
    .footer h3{margin:0 0 15px;color:#fff;font-size:15px}
    .footer-grid>div>a{display:block;margin:0 0 9px;color:#b9c9dc;font-size:13px}
    .footer-grid>div>a:hover{color:#fff}
    .footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:35px;padding-top:18px;border-top:1px solid rgba(255,255,255,.15);color:#8ea4bd;font-size:12px}

    @media (max-width:1050px){
      .header-inner{gap:15px}
      .logo{min-width:auto}
      .nav-link{padding-left:8px;padding-right:8px}
      .member-link{display:none}
    }
    @media (max-width:820px){
      .topbar .container{padding:8px 0;align-items:flex-start}
      .topbar-links{gap:10px;flex-direction:column;text-align:right}
      .header-inner{height:68px}
      .main-nav{display:none}
      .hamburger{display:block}
      .article-page{padding:32px 0 55px}
      .article-header,.article-content-card{padding:26px 22px}
      .article-cover img{max-height:320px}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media (max-width:560px){
      .container{width:min(100% - 28px,1180px)}
      .topbar{font-size:12px}
      .topbar .container{display:block}
      .topbar-links{display:flex;flex-direction:row;justify-content:space-between;margin-top:3px;text-align:left}
      .logo span{font-size:16px}
      .open-account{display:none}
      .article-title{font-size:28px}
      .article-summary{font-size:14px}
      .article-meta{gap:8px 14px}
      .article-content-card{padding:24px 18px}
      .article-content{font-size:15px}
      .article-nav{grid-template-columns:1fr}
      .article-nav .next{text-align:left}
      .related-grid{grid-template-columns:1fr}
      .related-card{display:grid;grid-template-columns:125px 1fr}
      .related-card img{height:100%;min-height:120px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:25px 18px}
      .footer-grid>div:first-child{grid-column:1/-1}
      .footer-bottom{display:block}
      .footer-bottom span{display:block;margin-top:6px}
    }