:root{--blue:#0B3D91;--ink:#182633;--muted:#667581;--line:#dfe6e8;--mist:#f4f7f5;--green:#607b68;--white:#fff}
    *{box-sizing:border-box}html,body{margin:0;padding:0;color:var(--ink);font-family:Arial,"Microsoft YaHei",sans-serif;background:#fff;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:#16242d;color:#dbe5e3;font-size:13px}.topbar .container{height:36px;display:flex;align-items:center;justify-content:space-between}.topbar-right{display:flex;gap:22px}
    .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:35px}
    .logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;white-space:nowrap;color:var(--blue)}.logo img{width:38px;height:38px;object-fit:contain}
    .main-nav{flex:1}.nav-list{list-style:none;padding:0;margin:0;display:flex;justify-content:center;gap:5px}.nav-item{position:relative}.nav-link{display:block;padding:25px 14px;font-size:14px}.nav-link:hover,.nav-link:focus{color:var(--blue)}
    .has-arrow:after{content:"⌄";font-size:12px;margin-left:6px}.dropdown-panel,.mega-menu{position:absolute;top:calc(100% + 1px);left:50%;transform:translateX(-50%);width:300px;padding:20px;background:#fff;border:1px solid var(--line);box-shadow:0 18px 45px #19343d18;opacity:0;visibility:hidden;transition:.2s;z-index:30}.mega-menu{width:650px}.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}
    .dropdown-panel:before,.mega-menu:before{content:"";position:absolute;left:0;right:0;top:-8px;height:8px}.menu-title{margin:0 0 12px;color:var(--blue);font-weight:bold;font-size:14px}.menu-list{display:grid;gap:7px}.menu-list a:hover,.drawer-menu a:hover{color:var(--blue)}
    .mega-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.broker-mini,.video-mini,.tool-mini,.product-mini{display:flex;gap:10px;padding:8px 0;border-bottom:1px solid #edf1f0;font-size:12px}.broker-mini img{width:34px;height:34px;object-fit:contain}.video-mini img,.product-mini img{width:62px;height:42px;object-fit:cover}.tool-mini img{width:28px;height:28px;object-fit:contain}.broker-mini b,.tool-mini b{font-size:13px}.mega-footer{display:block;color:var(--blue);font-size:13px;font-weight:bold;margin-top:13px}
    .header-btns{display:flex;align-items:center;gap:9px;white-space:nowrap}.member-btn,.open-btn{padding:7px 12px;border-radius:4px;font-size:13px}.member-btn{color:var(--blue);border:1px solid var(--blue)}.open-btn{background:var(--blue);color:#fff}
    .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}.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}
    .tool-detail-page{background:var(--mist);padding:54px 0 76px;min-height:620px}.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:24px}.breadcrumb a{color:var(--blue)}
    .tool-layout{display:grid;grid-template-columns:minmax(0,1fr) 310px;gap:30px;align-items:start}.tool-main,.tool-side{background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:0 10px 30px #213b4010}.tool-main{padding:38px}.tool-heading{display:flex;align-items:center;gap:18px;border-bottom:1px solid var(--line);padding-bottom:24px;margin-bottom:28px}.tool-heading img{width:74px;height:74px;object-fit:contain;border-radius:12px;background:#eef3f0;padding:10px}.tool-heading h1{font-size:30px;line-height:1.25;margin:0 0 6px}.tool-intro{color:var(--muted);margin:0}.tool-meta{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 28px}.tool-meta span{background:#edf3f0;color:var(--green);padding:4px 12px;border-radius:20px;font-size:13px}.tool-body{min-width:0;max-width:100%;overflow-x:auto}.tool-body img,.tool-body table{max-width:100%}.tool-body h2,.tool-body h3{color:var(--blue);margin-top:28px}.tool-actions{display:flex;gap:12px;margin-top:30px}.tool-actions a{padding:10px 20px;border-radius:5px;background:var(--blue);color:#fff}.tool-actions a.secondary{background:#e8efec;color:var(--green)}
    .tool-side{padding:24px;position:sticky;top:20px}.tool-side h2{font-size:18px;margin:0 0 15px}.related-tool{display:grid;grid-template-columns:42px 1fr;gap:10px;padding:13px 0;border-bottom:1px solid var(--line)}.related-tool img{width:42px;height:42px;object-fit:contain;background:#f0f4f2;border-radius:6px;padding:5px}.related-tool strong{font-size:14px}.related-tool p{font-size:12px;color:var(--muted);margin:2px 0 0}
    .footer{background:#17252d;color:#d6e0df;padding:48px 0 20px;font-size:13px}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:35px}.footer-brand{font-size:21px;font-weight:bold;color:#fff;margin-bottom:10px}.footer h3{font-size:15px;color:#fff;margin:0 0 13px}.footer-grid a{display:block;color:#c1cfcd;margin:5px 0}.footer-grid a:hover{color:#fff}.footer-bottom{border-top:1px solid #3a4a50;margin-top:30px;padding-top:17px;display:flex;justify-content:space-between;color:#9eaeac}
    @media(max-width:900px){.main-nav{display:none}.hamburger{display:block}.header-btns{margin-left:auto}.mega-menu{width:calc(100vw - 40px)}.tool-layout{grid-template-columns:1fr}.tool-side{position:static}.footer-grid{grid-template-columns:1fr 1fr}}
    @media(max-width:600px){.container{width:min(100% - 28px,1180px)}.topbar .container{height:auto;padding:8px 0;display:block}.topbar-right{gap:12px;margin-top:3px;flex-wrap:wrap}.header{height:68px}.logo{font-size:16px}.member-btn,.open-btn{display:none}.mobile-drawer{display:block;position:fixed;z-index:50;right:-330px;top:0;width:min(330px,88vw);height:100vh;background:#fff;transition:.25s;overflow:auto;box-shadow:-12px 0 35px #0002}.mobile-drawer.open{right:0}.drawer-overlay{position:fixed;inset:0;background:#10232a99;z-index:45;display:none}.drawer-overlay.open{display:block}.drawer-head{display:flex;align-items:center;gap:15px;padding:20px;border-bottom:1px solid var(--line);font-weight:bold}.drawer-head>a{margin-left:auto;color:var(--blue)}.drawer-close{font-size:26px;background:none;border:0;color:var(--muted)}.drawer-menu{padding:10px 20px}.drawer-link,.drawer-toggle{display:block;width:100%;padding:13px 0;border:0;background:none;text-align:left;border-bottom:1px solid #edf0ef;font-size:15px;color:var(--ink)}.drawer-toggle:after{content:"＋";float:right}.drawer-toggle.active:after{content:"－"}.drawer-submenu{display:none;padding:5px 0 8px 14px}.drawer-submenu.open{display:block}.drawer-submenu a{display:block;padding:7px 0;color:var(--muted);font-size:13px}.tool-detail-page{padding:30px 0 50px}.tool-main{padding:22px}.tool-heading{align-items:flex-start}.tool-heading h1{font-size:24px}.tool-heading img{width:58px;height:58px}.footer-grid{grid-template-columns:1fr;gap:22px}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:6px}}